CN216366392U - Fire extinguishing system for extinguishing fire between emergency diesel generators - Google Patents

Abstract

The utility model discloses a fire-fighting system for fighting fire between emergency diesel generators, which comprises a spraying device, a control device, a proportional mixer, a foam supply device and a water supply device, wherein the input end of the proportional mixer is respectively communicated with the water supply device and the foam supply device, the output end of the control device is communicated with the spraying device, the control device comprises a fire detector and a control component, the fire detector comprises a smoke-sensitive detector and an infrared flame detector, the control component comprises a controller, the smoke-sensitive detector and the infrared flame detector are respectively and electrically connected with the controller, when the smoke concentration is sensed to reach the concentration threshold value and the flame is sensed, a first signal and a second signal are respectively sent to the controller, when the controller receives the two signals simultaneously, and controlling the first valve and the second valve to be opened simultaneously, so that the water and the foam concentrate enter the proportioner simultaneously to be mixed proportionally. The fire-fighting system can effectively reduce the risk of misoperation of the fire-fighting system while ensuring that a fire disaster is extinguished.

Description

Fire extinguishing system for extinguishing fire between emergency diesel generators

Technical Field

The utility model relates to a fire-fighting system for fighting fire between emergency diesel generators.

Background

Under the condition that the nuclear power station loses power outside the main plant and the auxiliary plant, the emergency diesel generator set has operation capacity when and after any design benchmark accident occurs, so that an emergency power supply is provided for important equipment in the plant and plays an important role in nuclear safety, and therefore the fire safety of the emergency diesel generator set is also an important component of the nuclear safety.

The emergency diesel generator set is generally arranged in an independent factory building, the fire hazard of the emergency diesel generator set mainly comes from a fuel oil pipeline, a part of lubricating oil pipelines and the like of the diesel generator set, the ignition point of the fuel oil is generally about 60 ℃, once a fire disaster occurs, the fire spread rapidly, and the emergency diesel generator set belongs to a liquid flowing type fire disaster. In the prior art, the fire sensing sensitivity of a fire protection system for an emergency diesel generator set is too high, and when a fire disaster does not happen, the situation of mistaken spraying can be caused by the situations of too high temperature of a factory building, equipment faults and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of the prior art, and provides a fire fighting system for fighting fire between emergency diesel generators, wherein the fire fighting system can start blasting spraying only when the ambient temperature reaches the temperature set by a spray head, so that the error spraying can be effectively reduced.

In order to solve the problems, the utility model adopts the following technical scheme:

the utility model provides a fire extinguishing system who puts out conflagration between emergent diesel generator, includes spray set, controlling means, proportioner, foam feeding device and water feeding device, two inputs of proportioner respectively with water feeding device and foam feeding device intercommunication, its output with the spray set intercommunication, spray set sets up at the fire prevention district for spray the fire prevention district, controlling means includes fire detector, control assembly and valve member, fire detector includes smoke detector and infrared flame detector, control assembly includes controller and valve control unit, smoke detector with the controller electricity is connected for send first signal for when sensing to smog concentration and reaching the concentration threshold value the controller, infrared flame detector with the controller electricity is connected, the valve assembly comprises a first valve and a second valve, the first valve is arranged at the input end of the proportional mixer communicated with the water supply device, the second valve is arranged at the input end of the proportional mixer communicated with the foam supply device, the first valve and the second valve are electrically connected with the controller through a valve control unit, the controller is used for sending a third signal to the valve control unit when simultaneously receiving the first signal and the second signal, the valve control unit controls the first valve and the second valve to be simultaneously opened so that water in the water supply device and foam liquid in the foam supply device simultaneously enter the proportional mixer and are proportionally mixed to form mixed liquid, and the mixed liquid enters the spraying device.

Preferably, controlling means still includes the alarm subassembly, the alarm subassembly includes first alarm and second alarm, the controller still with first alarm electricity is connected for control first alarm and send one-level alarm sound when receiving first signal and not receiving the second signal, the controller still with the second alarm electricity is connected for control second alarm and send one-level alarm sound when receiving the second signal and not receiving first signal, the controller still is used for controlling first alarm and/or second alarm and send second-level alarm sound when receiving first signal and second signal simultaneously.

Preferably, the valve control unit includes an electromagnetic release valve and a first pipeline, the electromagnetic release valve is disposed on the first pipeline, one end of the first pipeline is communicated with the first valve, the other end of the first pipeline is communicated with the drainage end, the foam supply device includes a storage tank, a second pipeline, a third pipeline and a fourth pipeline, the second valve is a three-way valve and includes a first port, a second port and a third port, one end of the second pipeline is communicated with the storage tank, the other end of the second pipeline is communicated with the first port of the second valve, one end of the third pipeline is communicated with the proportional mixer, the other end of the third pipeline is communicated with the second port of the second valve, one end of the fourth pipeline is communicated with the third port of the second valve, the other end of the fourth pipeline is communicated with the first node of the first pipeline, the first node is located on the first pipeline, and the first valve and the second valve are both pressure control valves, the electromagnetic release valve is electrically connected with the controller, the controller sends a third signal to the electromagnetic release valve when receiving a first signal and a second signal at the same time, so that the electromagnetic release valve is controlled to be opened, water in the second pipeline and the third pipeline enters the first pipeline through the fourth pipeline, the water in the first pipeline is drained and decompressed through the drainage end, the first valve and the second valve are synchronously opened, and the water in the water supply device and foam liquid in the storage tank can enter the proportional mixer at the same time.

Preferably, the valve control unit further comprises a manual starting valve and a fifth pipeline, the fifth pipeline is connected with the first pipeline in parallel, the manual starting valve is arranged on the fifth pipeline, and when the manual starting valve and/or the electromagnetic release valve are opened, water is drained and decompressed through the first pipeline and/or the fifth pipeline.

Preferably, spray set includes shower and shower nozzle, the shower nozzle sets up on the shower and be in the top of fire prevention district, and the quantity of shower nozzle is a plurality of, and a plurality of shower nozzles are in interval arrangement on the shower, the shower nozzle adopts closed foam nozzle, closed foam nozzle has fixed blasting temperature threshold value, and when its ambient temperature that is located is higher than when blasting temperature, closed foam nozzle breaks to make the mixed liquid that comes from the proportioner spray and go out.

Preferably, the blasting temperature threshold of the closed foam nozzle is 93 ℃. Preferably, the water supply device includes a water source port, a water flow indicator, a sixth pipe, a seventh pipe, the first valve is arranged at the input end of the sixth pipeline, the output end of the sixth pipeline is communicated with the proportional mixer, the input end of the seventh pipeline is communicated with a water source port, the first valve is arranged at the output end of the seventh pipeline, the water flow indicator is arranged on the sixth pipeline and is electrically connected with the controller, an alarm flow threshold value is arranged in the water flow indicator, when the water flow in the sixth pipeline exceeds the alarm flow threshold value, the water flow indicator sends a fourth signal to the controller, the alarm component also comprises a third alarm which is electrically connected with the controller, and when the controller receives the fourth signal, the third alarm is controlled to send out a third-level alarm sound.

Preferably, the water supply device further comprises an alarm pipeline and a purging unit, the alarm pipeline comprises an eighth pipeline, a pressure monitor, a filter and a hydraulic alarm bell, an input end of the eighth pipeline is communicated with an output end of a first valve arranged on the sixth pipeline, an output end of the eighth pipeline is communicated with the drainage end, water from the water supply device flows into the eighth pipeline through the first valve and further flows to the eighth pipeline, the pressure detector, the filter and the hydraulic alarm bell are all arranged on the eighth pipeline, the filter is used for filtering sundries in water in the eighth pipeline to ensure that the hydraulic alarm bell gives out a sound alarm in time, the pressure monitor is electrically connected with the controller and is used for monitoring the water pressure in the eighth pipeline and further monitoring the opening state of the first valve, and when the water pressure in the eighth pipeline is smaller than a pressure threshold value, send open abnormal signal give the controller for whether detect first valve normally opens, it is used for weathering to sweep the unit moisture in each pipeline in the fire extinguishing system, it includes air compressor and air supply line to sweep the unit, air supply line's input with air compressor intercommunication, its output with the sixth pipeline communicates in the second node, the second node is located on the sixth pipeline, and be located rivers indicator with between the proportional mixer.

Preferably, the storage tank is a capsule type tank body, the inside and the outside of the capsule of the storage tank are respectively used for storing foam liquid fire-fighting water, the foam supply device further comprises a ninth pipeline, an on-site liquid level meter and a safety valve, one end of the ninth pipeline is communicated with the seventh pipeline at a third node, the third node is located on the seventh pipeline, the other end of the ninth pipeline is communicated with the storage tank, the on-site liquid level meter is communicated with the bottom of the storage tank and used for calibrating and checking the volume of the foam liquid in the foam tank, and the safety valve is communicated with the top of the storage tank and used for opening and releasing pressure when the pressure in the storage tank is greater than a set threshold value of the safety valve.

Preferably, an isolation valve is arranged on the seventh pipeline, and the isolation valve is arranged between the third node and the water source port.

The fire fighting system provided by the utility model adopts the double fire detection sensors, the fire fighting system can be started only when two fire signals are simultaneously acquired, and the spraying device adopts the closed blasting nozzle which can blast and spray only when the environmental temperature is higher than the blasting temperature, so that the accuracy of fire detection is greatly improved, and the condition of mistaken spraying is effectively prevented.

Drawings

Fig. 1 is a schematic structural diagram of a fire fighting system in an embodiment of the present invention.

In the figure: 1-fire-prevention area, 2-smoke-sensitive detector, 21-infrared flame detector, 3-isolation valve, 4-first valve, 5-storage tank, 6-second valve, 7-proportioning mixer, 8-electromagnetic release valve, 9-manual starting valve, 10-pressure monitor, 11-filter, 12-hydraulic alarm bell, 13-water flow indicator, 14-gas supply pipeline, 15-water supply device, 16-local liquid level meter, 17-second pipeline, 171-third pipeline, 172-fourth pipeline, 173-fifth pipeline, 174-sixth pipeline, 175-seventh pipeline, 176-eighth pipeline, 177-ninth pipeline, 178-first pipeline, 18-spray pipe, 19-closed foam nozzle, 20-a first node, 201-a second node, 202-a third node, 22-a safety valve, 23-a controller, 24-a third valve, 25-a fourth valve, 26-a first check valve, 27-a second check valve, and 28-an emergency diesel generator set.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.

In the description of the present invention, it should be noted that the indication of orientation or positional relationship, such as "on" or the like, is based on the orientation or positional relationship shown in the drawings, and is only for convenience and simplicity of description, and does not indicate or imply that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected," "disposed," "mounted," "fixed," and the like are to be construed broadly, e.g., as being fixedly or removably connected, or integrally connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.

The utility model provides a fire fighting system for fighting fire between emergency diesel generators, which comprises a spraying device, a control device, a proportional mixer, a foam supply device and a water supply device, wherein two input ends of the proportional mixer are respectively communicated with the water supply device and the foam supply device, the output end of the proportional mixer is communicated with the spraying device, the spraying device is arranged in a fire-proof area and is used for spraying on the fire-proof area, the control device comprises a fire detector, a control assembly and a valve assembly, the fire detector comprises a smoke-sensitive detector and an infrared flame detector, the control assembly comprises a controller and a valve control unit, the smoke-sensitive detector is electrically connected with the controller and is used for sending a first signal to the controller when the smoke concentration is sensed to reach a concentration threshold value, the infrared flame detector is electrically connected with the controller, the valve assembly comprises a first valve and a second valve, the first valve is arranged at the input end of the proportional mixer communicated with the water supply device, the second valve is arranged at the input end of the proportional mixer communicated with the foam supply device, the first valve and the second valve are electrically connected with the controller through a valve control unit, the controller is used for sending a third signal to the valve control unit when simultaneously receiving the first signal and the second signal, the valve control unit controls the first valve and the second valve to be simultaneously opened so that water in the water supply device and foam liquid in the foam supply device simultaneously enter the proportional mixer and are proportionally mixed to form mixed liquid, and the mixed liquid enters the spraying device.

Examples

As shown in fig. 1, the embodiment discloses a fire fighting system for fighting fire between emergency diesel generators, which comprises a spraying device, a control device, a proportioner 7, a foam supply device and a water supply device 15, wherein two input ends of the proportioner 7 are respectively communicated with the water supply device 15 and the foam supply device, the output end of the proportioner is communicated with the spraying device, the spraying device is arranged in a fire-proof area 1 and is used for spraying to the fire-proof area 1, the control device comprises a fire detector, a control component and a valve component, the fire detector comprises a smoke-sensitive detector 2 and an infrared flame detector 21, the control component comprises a controller 23 and a valve control unit, the smoke-sensitive detector 2 is electrically connected with the controller 23 and is used for sending a first signal to the controller 23 when sensing that the smoke concentration reaches a concentration threshold value, the infrared flame detector 21 is electrically connected with the controller 23, the valve assembly comprises a first valve 4 and a second valve 6, the first valve 4 is arranged at the input end of the proportional mixer 7 communicated with the water supply device 15, the second valve 6 is arranged at the input end of the proportional mixer 7 communicated with the foam supply device, the first valve 4 and the second valve 6 are electrically connected with the controller 23 through a valve control unit, the controller 23 is used for sending a third signal to the valve control unit when simultaneously receiving the first signal and the second signal, and the valve control unit controls the first valve 4 and the second valve 6 to be opened simultaneously so that the water in the water supply device 15 and the foam liquid in the foam supply device simultaneously enter the proportional mixer 7 and are mixed in proportion to form mixed liquid, and the mixed liquid enters the spraying device.

In this embodiment, the smoke detector 2 and the infrared flame detector 21 are two different types of detectors, and are both disposed in the fire protection area 1, wherein the smoke detector 2 is configured to sense a smoke concentration in the fire protection area 1, and when the sensed concentration is higher than a concentration threshold value set therein, send a first signal to the controller 23. The infrared flame detector 21 is used for sensing the intensity of infrared heat radiation emitted by the flame, and when the sensed intensity is higher than an intensity threshold value set inside, a second signal is sent to the controller 23.

In this embodiment, the control device further comprises an alarm assembly, the alarm assembly comprises a first alarm and a second alarm, the controller 23 is further electrically connected with the first alarm, for controlling the first alarm to emit a primary alarm sound when receiving the first signal but not the second signal, the controller 23 is also electrically connected to the second alarm, for controlling the second alarm to emit a primary alarm sound when receiving the second signal but not the first signal, the controller 23 is further configured to control the first alarm and/or the second alarm to emit a secondary alarm sound when receiving the first signal and the second signal at the same time, and when the controller 23 receives the first signal and the second signal at the same time, i.e., a secondary alarm sound, the controller 23 controls the first valve 4 and the second valve 6 to be opened, so that the water and the foam concentrate are simultaneously introduced into the proportioner 7 to be mixed. The fire-fighting system adopts two fire detectors in different forms, so that the detection accuracy of the fire is effectively improved, and the condition of mistaken spraying is reduced.

As shown in fig. 1, the valve control unit includes an electromagnetic release valve 8, a first pipe 178, the electromagnetic release valve 8 is disposed on the first pipe 178, one end of the first pipe 178 is communicated with the first valve 4, the other end of the first pipe 178 is communicated with the drain end, the foam supplying device includes a storage tank 5, a second pipe 17, a third pipe 171 and a fourth pipe 172, the second valve 6 is a three-way valve including a first port, a second port and a third port, one end of the second pipe 17 is communicated with the storage tank 5, the other end is communicated with the first port of the second valve 6, one end of the third pipe 171 is communicated with the proportional mixer 7, the other end is communicated with the second port of the second valve 6, one end of the fourth pipe 172 is communicated with the third port of the second valve 6, the other end is communicated with the first pipe 178 at a first node 20, the first node 20 is disposed on the first pipe 178, and is located between the electromagnetic release valve and the first valve, first valve 4 and second valve 6 are pressure control valves, first valve 4 and second valve 6 are electrically connected with controller 23 through electromagnetic release valve 8, specifically, when receiving the first signal and the second signal simultaneously, controller 23 sends the third signal to electromagnetic release valve 8, thereby control electromagnetic release valve 8 to open, and then make the water in second pipeline 17 and third pipeline 171 enter first pipeline 178 through fourth pipeline 172, the water in first pipeline 178 is again through drainage end drainage pressure release, and then make first valve 4 and second valve 6 open synchronously, and then make the water in water feeding mechanism 15 and the foam liquid in storage tank 5 can enter proportioner 7 simultaneously.

As shown in fig. 1, a third valve 24 is disposed on the second pipeline 17, the third valve 24 is used for controlling the connection between the foam tank and the second valve 6, and the third valve 24 is always kept in a normally open state during use. The third pipe 171 is provided with a first check valve 26 for preventing the mixed liquid in the proportioner 7 from flowing back.

As shown in fig. 1, the valve control unit further includes a manual start valve 9 and a fifth pipeline 173, the fifth pipeline 173 is connected in parallel with the first pipeline 178, one end of the fifth pipeline 173 is communicated with the first pipeline 178, the other end of the fifth pipeline is communicated with the water discharge end, the manual start valve 9 is disposed on the fifth pipeline 173, the manual start valve 9 is used for controlling the electromagnetic release valve 8 to fail or in a special emergency, at this time, an operator can open the manual start valve 9 to enable the first pipeline 178 to be communicated with the water discharge end through the fifth pipeline 173, so that the purpose of water discharge and pressure relief is achieved, and it is further ensured that the first valve 4 and the second valve 6 can be opened in time. When the electromagnetic release valve 8 receives the third signal sent by the controller 23 or the operator receives a secondary alarm sound, the controller 23 controls the electromagnetic release valve 8 to open and/or the operator opens the manual starting valve 9, so that the water flow in each pipeline is discharged and decompressed through the first pipeline 178 and/or the fifth pipeline 173.

In this embodiment, the spraying device comprises a spraying pipe 18 and a plurality of spraying heads, the spraying heads are arranged on the spraying pipe 18 and above the fire prevention area 1, the plurality of spraying heads are arranged on the spraying pipe 18 at intervals, and the input end of the spraying pipe 18 is communicated with the output end of the proportioning mixer 7. The shower nozzle adopts closed foam nozzle 19, and closed foam nozzle 19 has fixed blasting temperature, and when its ambient temperature who locates was higher than blasting temperature, closed foam nozzle 19 broke to make the foam concentrate that comes from proportioner 7 spray with the mixed liquid of water and go out, closed foam nozzle 19 has further guaranteed the accuracy that fire extinguishing system surveyed the conflagration through its blasting temperature, thereby prevents that fire extinguishing system from taking place the condition that the mistake sprayed.

In this embodiment, the fire protection system is used to ensure the fire safety of the emergency diesel generator set 28 of the nuclear power plant, the emergency diesel generator set 28 is used to supply power to the emergency shutdown system of the nuclear power plant, and the emergency shutdown system is used to control the shutdown of the nuclear reactor when a nuclear accident occurs. Emergent diesel generating set 28 sets up the fire prevention district 1 at the factory building of nuclear power station, and spray set sets up the top at fire prevention district 1, and when the conflagration breaing out, spray set sprays the fire extinguishing to emergent diesel generating set 28 to can guarantee the safety of the emergent energy of nuclear power station, and then guarantee nuclear safety. Emergent diesel generating set 28 needs certain start-up time, and in this embodiment, emergent diesel generating set 28's start-up time needs 15 seconds, just can reach its full load power to control the action of emergency shutdown system, because this fire extinguishing system's conflagration detection rate of accuracy is higher, adopts closed foam nozzle 19 moreover, can satisfy emergent diesel generating set 28 to the requirement of start-up time.

In this embodiment, the blasting temperature of closed foam nozzle 19 is 93 ℃, after the conflagration takes place, only reach 93 ℃ when the temperature of flame retardant zone 1, closed foam nozzle 19 just can blast and spray, wherein, the blasting temperature of closed foam nozzle 19 is decided by the material of locating its intraoral spray control unit, because spray control unit's material is different, its blasting temperature also can be different, in this embodiment, spray control unit adopts the quartz glass ball, because the material thermal behavior of quartz glass ball, when flame retardant zone 1 temperature reaches 93 ℃, the quartz glass ball breaks, thereby open closed foam nozzle 19's the mouth that sprays, so that the mixed liquid in shower 18 spouts from the mouth that sprays. The specific value of the ratio of the mixed liquid formed by mixing the foam concentrate and the water is controlled by the proportioner 7, in this embodiment, the ratio of the foam concentrate to the water is 3:97, and the mixed liquid has a good effect on extinguishing fire.

In this embodiment, the water supply device 15 includes a water source port, a water flow indicator 13, a sixth pipeline 174, and a seventh pipeline 175, the first valve 4 is disposed at an input end of the sixth pipeline 174, an output end of the sixth pipeline 174 is communicated with the proportional mixer 7, an input end of the seventh pipeline 175 is communicated with the water source port, the first valve 4 is disposed at an output end of the seventh pipeline 175, water from the water source port is delivered to the proportional mixer 7 through the seventh pipeline 175, the first valve 4, and the sixth pipeline 174, the water flow indicator 13 is disposed on the sixth pipeline 174 and electrically connected to the controller 23, the water flow indicator 13 has an alarm flow threshold, when the water flow in the sixth pipeline 174 exceeds the alarm flow threshold, the water flow indicator 13 sends a fourth signal to the controller 23, the alarm assembly further includes a third alarm, the third alarm is electrically connected to the controller 23, when the controller 23 receives the fourth signal transmitted from the water flow indicator 13, it controls the third alarm to emit a third-level alarm sound, so that it is confirmed that the water flows through the sixth pipe 174, and thus the occurrence of a fire can be further confirmed.

In this embodiment, the water supply device 15 further comprises an alarm line and a purging unit, the alarm line comprises an eighth pipeline 176, a pressure monitor 10, a filter 11, and a hydraulic alarm 12, an input end of the eighth pipeline 176 is connected to an output end of the first valve 4 on the sixth pipeline 174, an output end of the eighth pipeline is connected to a drain end, and part of water from the water supply device 15 flows into the sixth pipeline 174 through the first valve 4 and then flows into the eighth pipeline 176; the pressure monitor 10, the filter 11 and the alarm bell 12 are all installed on the eighth pipeline 176, and the filter 11 is used for filtering sundries in the water in the eighth pipeline (176), so that the alarm bell 12 can normally give out an alarm sound. The pressure monitor 10 is electrically connected to the controller 23 and is configured to monitor the water pressure in the eighth pipeline 176, so as to monitor the opening state of the first valve 4, and send an opening abnormal signal to the controller 23 when the water pressure in the eighth pipeline 176 is smaller than a pressure threshold, and after receiving the opening abnormal signal, the controller 23 sends a third signal to the electromagnetic release valve again to control the electromagnetic release valve to open, so as to ensure that the first valve is normally opened; if the electromagnetic release valve can not be normally opened all the time, at the moment, the first pipeline can be guaranteed to discharge water and release pressure through the manual pneumatic valve, and therefore the first valve is opened. The blowing unit is used for blowing dry moisture in each pipeline in the fire fighting system, the blowing unit comprises an air compressor and an air supply pipeline 14, the input end of the air supply pipeline 14 is communicated with the air compressor, the output end of the air supply pipeline 14 is communicated with a sixth pipeline 174 through a second node 201, the second node 201 is located on the sixth pipeline 174 and is located between a water flow indicator 13 and a proportion mixer 7, after drainage and pressure relief of each pipeline, compressed air from the air compressor blows dry moisture in each pipeline in the fire fighting system through the air supply pipeline 14, and pipeline corrosion is prevented.

As shown in fig. 1, the storage tank 5 is a capsule type tank, the storage tank 5 includes a foam liquid side and a storage water side surrounding the foam liquid, the foam supply device further includes a ninth pipe 177, an in-situ liquid level meter 16 and a safety valve 22, one end of the ninth pipe 177 and a seventh pipe 175 are communicated with a third node 202, the third node 202 is located on the seventh pipe 175, the other end of the ninth pipe 177 is communicated with the storage tank 5, so that water is filled into the storage tank through the seventh pipe 175 and pressurized, the pressure of the storage water side is transmitted to the foam liquid inside the storage tank, so that the foam liquid in the storage tank is controlled to reach the interior of the proportional mixer 7 along the second pipe 17 and the third pipe 171, in this embodiment, the ninth pipe 177 is provided with a second check valve 27 and a fourth valve 25, the fourth valve 25 is used for controlling the communication between the storage tank 5 and a water source port, so as to control the water pressure of the storage tank 5, the second check valve 27 is arranged between the storage tank 5 and the fourth valve 25, for preventing the water in the storage tank 5 from flowing back. The on-site liquid level meter 16 is communicated with the bottom of the storage tank 5 and is used for calibrating and checking the volume of the foam liquid in the storage tank 5, and the safety valve 22 is communicated with the top of the storage tank 5 and is used for opening and releasing pressure when the pressure in the storage tank 5 is greater than the set threshold value of the safety valve 22.

Optionally, an isolation valve 3 is disposed on the seventh pipe 175, the isolation valve 3 is disposed between the third node 202 and the water source port, and the water source port is controlled to start or stop delivering water into the seventh pipe 175 by opening and closing the isolation valve 3.

In this embodiment, the working process of the fire fighting system is as follows:

after a fire disaster occurs in the fireproof area 1, the smoke detector 2 sends a first signal to the controller 23 when detecting that the smoke concentration of the fireproof area 1 reaches a set concentration threshold value, and the infrared flame detector 21 sends a second signal to the controller 23 when detecting that the infrared radiation intensity sent by the flame of the fireproof area 1 is higher than the intensity threshold value set in the fireproof area 1. When the controller 23 receives the first signal and the second signal at the same time, the first alarm and/or the second alarm are controlled to send out a second-level alarm sound, a third signal is sent to the electromagnetic release valve 8, the electromagnetic release valve 8 is opened, water in the second pipeline 17 and the third pipeline 171 enters the first pipeline 178 through the fourth pipeline 172, water in the first pipeline 178 is drained and decompressed through the drainage end, the first valve 4 and the second valve 6 are opened synchronously, when the electromagnetic release valve 8 breaks down, the manual starting valve 9 can be opened by an operator, and water in the first pipeline 178 flows through the fifth pipeline 173 to be drained and decompressed. The water from the water supply device 15 and the foam liquid in the storage tank 5 can simultaneously enter the proportioner 7 to form a mixed liquid.

When the temperature of the fire-protection area 1 further rises to reach the explosion temperature of the closed foam nozzles 19, the mixed liquid in the spray pipes 18 is sprayed out from the plurality of closed foam nozzles 19, thereby extinguishing the fire. At this time, the flow rate of water flowing through the sixth pipe 174 increases.

When water flows through the water flow indicator 13 of the sixth pipeline 174 and when the water flow in the sixth pipeline 174 exceeds the alarm flow threshold of the water flow indicator 13, the water flow indicator 13 sends a fourth signal to the controller 23, and after receiving the fourth signal, the controller 23 controls the third alarm to send a third-level alarm sound, so that the water flow is confirmed to pass through the sixth pipeline 174, and further the occurrence of a fire is confirmed.

Part of the water flowing through the first valve 4 from the water supply means 15 flows into the eighth conduit 176 and the pressure monitor is adapted to monitor the water pressure in the eighth conduit 176, thereby monitoring the opening state of the first valve 4, and to send an opening abnormality signal to said controller 23 when the water pressure in the eighth conduit 176 is less than its pressure threshold, and the alarm bell 12 sounds when the water in the eighth conduit 176 flows past the alarm bell 12.

In this embodiment, fire extinguishing system adopts dual fire detector, only when the controller receives two kinds of fire signals simultaneously, fire extinguishing system just can start, and spray set adopts closed blasting nozzle, only when ambient temperature is higher than its blast temperature, spray set just can begin to spray, when guaranteeing to put out the conflagration, can effectively reduce the risk of fire extinguishing system malfunction, reduce the influence of spraying that causes to emergent diesel generating set 28, satisfy the nuclear power station under accident situation simultaneously, emergent diesel generating set 28 is to the requirement of activation time, this fire extinguishing system has higher security, reliability and economic nature.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the utility model, and these modifications and improvements are also considered to be within the scope of the utility model.

Claims (10)

1. A fire fighting system for fighting fire between emergency diesel generators is characterized by comprising a spraying device, a control device, a proportional mixer (7), a foam supply device and a water supply device (15),

two input ends of the proportioner (7) are respectively communicated with the water supply device (15) and the foam supply device, the output end of the proportioner is communicated with the spraying device,

the spraying device is arranged in the fire-proof area (1) and is used for spraying the fire-proof area (1),

the control device comprises a fire detector, a control component and a valve component, the fire detector comprises a smoke-sensitive detector (2) and an infrared flame detector (21),

the control assembly comprises a controller (23) and a valve control unit,

the smoke-sensitive detector (2) is electrically connected with the controller (23) and used for sending a first signal to the controller (23) when the smoke concentration is sensed to reach a concentration threshold value,

the infrared flame detector (21) is electrically connected with the controller (23) and is used for sending a second signal to the controller (23) when the flame is sensed,

the valve assembly comprises a first valve (4) and a second valve (6), the first valve (4) is arranged at the input end of the proportional mixer (7) communicated with the water supply device (15), the second valve (6) is arranged at the input end of the proportional mixer (7) communicated with the foam supply device, the first valve (4) and the second valve (6) are electrically connected with the controller (23) through a valve control unit,

the controller (23) is used for sending a third signal to the valve control unit when receiving the first signal and the second signal simultaneously, the valve control unit controls the first valve (4) and the second valve (6) to be opened simultaneously, so that water in the water supply device and foam liquid in the foam supply device enter the proportional mixer (7) simultaneously and are mixed in proportion to form mixed liquid, and the mixed liquid enters the spraying device again.

2. A fire protection system as defined in claim 1, wherein the control device further includes an alarm assembly including a first alarm and a second alarm,

the controller (23) is also electrically connected with the first alarm and is used for controlling the first alarm to send out primary alarm sound when receiving the first signal but not receiving the second signal,

the controller (23) is also electrically connected with the second alarm and is used for controlling the second alarm to send out primary alarm sound when receiving the second signal but not receiving the first signal,

the controller (23) is also used for controlling the first alarm and/or the second alarm to give out secondary alarm sound when the first signal and the second signal are received simultaneously.

3. A fire fighting system as defined in claim 2, characterized in that the valve control unit comprises a solenoid release valve (8), a first conduit (178),

the electromagnetic release valve (8) is arranged on the first pipeline (178), one end of the first pipeline (178) is communicated with the first valve (4), the other end is communicated with the water drainage end,

the foam supply device comprises a storage tank (5), a second pipeline (17), a third pipeline (171) and a fourth pipeline (172),

the second valve (6) is a three-way valve and comprises a first connector, a second connector and a third connector,

one end of the second pipeline (17) is communicated with the storage tank (5), the other end of the second pipeline is communicated with a first port of a second valve (6), one end of the third pipeline (171) is communicated with the proportional mixer (7), the other end of the third pipeline is communicated with a second port of the second valve (6),

one end of the fourth pipeline (172) is communicated with the third port of the second valve (6), the other end of the fourth pipeline is communicated with the first pipeline (178) and is communicated with a first node (20), the first node (20) is positioned on the first pipeline (178) and is positioned between the electromagnetic release valve (8) and the first valve (4),

the first valve (4) and the second valve (6) are both pressure control valves,

the electromagnetic release valve (8) is electrically connected with the controller, the controller (23) sends a third signal to the electromagnetic release valve (8) when receiving a first signal and a second signal simultaneously, so that the electromagnetic release valve (8) is controlled to be opened, water in the second pipeline (17) and the third pipeline (171) enters the first pipeline (178) through the fourth pipeline (172), water in the first pipeline (178) is drained and decompressed through the drainage end, the first valve (4) and the second valve (6) are synchronously opened, and water in the water supply device (15) and foam liquid in the storage tank (5) can enter the proportional mixer (7) simultaneously.

4. A fire fighting system as defined in claim 3, characterized in that the valve control unit further comprises a manually activated valve (9) and a fifth conduit (173),

the fifth pipeline (173) is connected with the first pipeline (178) in parallel, the manual starting valve (9) is arranged on the fifth pipeline (173),

when the manually actuated valve (9) and/or the solenoid release valve (8) are opened, the water flow is drained through the first (178) and/or fifth (173) conduits to be depressurized.

5. A fire fighting system as defined in claim 4, characterized in that the spray device comprises a spray pipe (18) and a spray head,

the spray heads are arranged on the spray pipes (18) and above the fire prevention area (1), the number of the spray heads is multiple, the spray heads are arranged on the spray pipes (18) at intervals,

the spray head adopts a closed foam spray head (19), the closed foam spray head (19) has a fixed blasting temperature threshold value, and when the environment temperature where the closed foam spray head is located is higher than the blasting temperature, the closed foam spray head (19) is broken so that the mixed liquid from the proportional mixer (7) is sprayed out.

6. A fire fighting system as defined in claim 5, characterized in that the burst temperature threshold of the closed foam nozzle (19) is 93 ℃.

7. A fire fighting system as defined in claim 6, characterized in that the water supply (15) comprises a water source port, a water flow indicator (13), a sixth conduit (174), a seventh conduit (175),

the first valve (4) is arranged at the input end of the sixth pipeline (174), the output end of the sixth pipeline (174) is communicated with the proportional mixer (7),

the input end of the seventh pipeline (175) is communicated with a water source port, the first valve (4) is arranged at the output end of the seventh pipeline (175),

the water flow indicator (13) is arranged on the sixth pipeline (174) and is electrically connected with the controller (23), an alarm flow threshold value is arranged in the water flow indicator (13), when the water flow in the sixth pipeline (174) exceeds the alarm flow threshold value, the water flow indicator (13) sends a fourth signal to the controller (23),

the alarm assembly further comprises a third alarm, the third alarm is electrically connected with the controller (23), and when the controller (23) receives a fourth signal, the third alarm is controlled to give out a third-level alarm sound.

8. A fire fighting system as defined in claim 7, characterized in that the water supply device (15) further comprises an alarm line and a purge unit,

the alarm pipeline comprises an eighth pipeline (176), a pressure monitor (10), a filter (11) and a hydraulic alarm bell (12),

the input end of the eighth pipeline (176) is communicated with the output end of the first valve (4) arranged on the sixth pipeline (174), the output end of the eighth pipeline is communicated with the drainage end, water from the water supply device (15) flows into the sixth pipeline (174) through the first valve (4) and further flows to the eighth pipeline (176), the pressure monitor (10), the filter (11) and the hydraulic alarm bell (12) are all arranged on the eighth pipeline (176),

the filter (11) is used for filtering sundries in the water in the eighth pipeline (176) so as to ensure that the hydraulic alarm bell (12) gives out sound alarm in time,

the pressure monitor (10) is electrically connected with the controller (23) and is used for monitoring the water pressure in the eighth pipeline (176) so as to monitor the opening state of the first valve (4), and sending an opening abnormal signal to the controller (23) when the water pressure in the eighth pipeline (176) is smaller than a pressure threshold value,

the blowing unit is used for drying moisture in each pipeline in the fire fighting system, the blowing unit comprises an air compressor and an air supply pipeline (14), the input end of the air supply pipeline (14) is communicated with the air compressor, the output end of the air supply pipeline is communicated with a sixth pipeline (174) through a second node (201), and the second node (201) is located on the sixth pipeline (174) and located between the water flow indicator (13) and the proportioning mixer (7).

9. A fire fighting system as defined in claim 8, characterized in that the tank (5) is a capsule tank, and the inside and outside of the capsule of the tank (5) are provided with foam concentrate and fire water, respectively, and the capsule can transmit the water pressure from the outside to the foam concentrate from the inside,

the foam supply device further comprises a ninth pipe (177), an in-situ liquid level gauge (16) and a safety valve (22),

one end of the ninth pipeline (177) is communicated with the seventh pipeline (175) at a third node (202), the third node (202) is positioned on the seventh pipeline (175), and the other end of the ninth pipeline (177) is communicated with the storage tank (5),

the on-site liquid level meter (16) is communicated with the bottom of the storage tank (5) and is used for calibrating and checking the volume of the foam liquid in the foam tank,

the safety valve (22) is communicated with the top of the storage tank (5) and is used for opening pressure relief when the pressure in the storage tank (5) is greater than a set threshold value of the safety valve (22).

10. A fire fighting system as defined in claim 9, characterized in that an isolation valve (3) is provided on the seventh pipe (175),

the isolation valve (3) is disposed between the third node (202) and the water source port.

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