CN111696296A - Fire alarm system - Google Patents
Fire alarm system Download PDFInfo
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- CN111696296A CN111696296A CN201910181887.1A CN201910181887A CN111696296A CN 111696296 A CN111696296 A CN 111696296A CN 201910181887 A CN201910181887 A CN 201910181887A CN 111696296 A CN111696296 A CN 111696296A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
- G05B19/41845—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by system universality, reconfigurability, modularity
Abstract
The invention provides a fire alarm system, which aims to solve the problem of low safety of the conventional fire alarm system. The fire alarm system includes: the system comprises a multi-column centralized fire alarm controller, a plurality of image-text working devices and a plurality of operation terminals; the multi-column centralized fire alarm controller, the plurality of image-text working devices and the plurality of operation terminals are connected in series to form a closed loop; the multiple rows of centralized fire alarm controllers are connected in series; each row of centralized fire alarm controllers is connected with a plurality of fire alarm junction boxes, and the fire alarm junction boxes are used for receiving signals of fire detectors; each row of centralized fire alarm controllers comprises a main controller and a redundant controller which are connected in series; the plurality of image-text working devices and the plurality of operation terminals are connected in sequence through connecting wires. Thus, if any end of the loop fails, the alarm can still be given through the other route. The safety of the fire alarm system is improved.
Description
Technical Field
The invention relates to the technical field of nuclear power, in particular to a fire alarm system.
Background
A nuclear power plant is a power plant that converts nuclear energy into heat energy to generate steam for a steam turbine, which in turn drives a generator to generate commercial power. Nuclear power plants generate electricity by establishing systems and devices that convert nuclear energy released by nuclear fission into electrical energy, with lower fuel costs and reduced pollution. However, once a safety accident such as a fire occurs in a nuclear power plant, a nuclear leakage will have serious consequences.
The nuclear power plant is composed of a nuclear island, a conventional island and an auxiliary building, and the automatic fire alarm system covers all areas of the nuclear power plant. In the existing fire alarm system, the fire detector in each area transmits fire information to a corresponding centralized fire alarm controller, and then the system alarms through the fire alarm controller. Each centralized fire alarm controller is independently arranged, when a line in a certain area breaks down, fire alarm cannot be timely carried out, and the safety of a fire alarm system is low.
Disclosure of Invention
The embodiment of the invention provides a fire alarm system, which aims to solve the problem of low safety of the existing fire alarm system.
In order to solve the technical problem, the invention is realized as follows:
the embodiment of the invention provides a fire alarm system, which comprises:
the system comprises a multi-column centralized fire alarm controller, a plurality of image-text working devices and a plurality of operation terminals; the multi-column centralized fire alarm controller, the plurality of image-text working devices and the plurality of operation terminals are connected in series to form a closed loop;
the multiple rows of centralized fire alarm controllers are connected in series; each row of centralized fire alarm controllers is connected with a plurality of fire alarm junction boxes, and the fire alarm junction boxes are used for receiving signals of fire detectors; each row of centralized fire alarm controllers comprises a main controller and a redundant controller which are connected in series;
the plurality of image-text working devices and the plurality of operation terminals are connected in sequence through connecting wires.
Optionally, each image-text working device is connected with a row of centralized fire alarm controllers; each operation terminal is connected with one image-text working device; the plurality of operation terminals are connected in series.
Optionally, each operation terminal is connected with a row of centralized fire alarm controllers; each image-text working device is connected with an operation terminal; the image-text working equipment is connected in series.
Optionally, each fire alarm junction box is connected to a plurality of fire detectors.
Optionally, each fire alarm junction box forms a closed loop with a corresponding plurality of connected fire detectors.
Optionally, the fire alarm junction box is connected with the centralized fire alarm controller through a signal line.
Optionally, the signal line is a shielded cable.
Optionally, the fire alarm system further comprises:
a plurality of regional fire alarm controllers forming a closed loop with a matching centralized fire alarm controller.
Optionally, the fire alarm system further comprises:
and each hydrogen detection device is connected with the matched centralized fire alarm controller.
Optionally, the fire alarm system further comprises:
and the display equipment is connected with the matched centralized fire alarm controller and is used for displaying the data information of the corresponding area.
In an embodiment of the present invention, there is provided a fire alarm system, including: the system comprises a multi-column centralized fire alarm controller, a plurality of image-text working devices and a plurality of operation terminals; the multi-column centralized fire alarm controller, the plurality of image-text working devices and the plurality of operation terminals are connected in series to form a closed loop. The multiple rows of centralized fire alarm controllers are connected in series; each row of centralized fire alarm controllers is connected with a plurality of fire alarm junction boxes, and the fire alarm junction boxes are used for receiving signals of fire detectors; each row of centralized fire alarm controllers comprises a main controller and a redundant controller which are connected in series; the plurality of image-text working devices and the plurality of operation terminals are connected in sequence through connecting wires. Thus, if any end of the loop fails, the alarm can still be given through the other route. The safety of the fire alarm system is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is one of the block diagrams of a fire alarm system according to an embodiment of the present invention;
fig. 2 is a second block diagram of a fire alarm system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, 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 protection scope of the present invention.
Referring to fig. 1 and 2, fig. 1 is one of the structural diagrams of a fire alarm system according to an embodiment of the present invention; fig. 2 is a second block diagram of a fire alarm system according to an embodiment of the present invention. The fire alarm system provided by the embodiment of the invention is applied to a nuclear power plant, and the nuclear power plant generally comprises a nuclear island, a conventional island and corresponding balance of plant (BOP). Due to the particularity of the nuclear power plant, the problem of how to better protect the personal safety of workers when a fire disaster occurs is particularly important. The fire alarm system of the embodiment of the invention comprises:
the system comprises a multi-column centralized fire alarm controller 1, a plurality of image-text working devices 2 and a plurality of operation terminals 3; the multi-column centralized fire alarm controller 1, the plurality of image-text working devices 2 and the plurality of operation terminals 3 are connected in series to form a closed loop;
the multiple rows of centralized fire alarm controllers 1 are connected in series; each row of centralized fire alarm controllers 1 is connected with a plurality of fire alarm junction boxes 4, and the fire alarm junction boxes 4 are used for receiving signals of fire detectors; each row of centralized fire alarm controllers 1 comprises a main controller 11 and a redundant controller 12 which are connected in series;
the plurality of teletext work apparatuses 2 and the plurality of operation terminals 3 are connected in series by a connection line.
In this embodiment, fig. 1 and 2 take an example of a fire alarm system including two rows of centralized fire alarm controllers 1, two teletext devices 2, and two operation terminals 3.
Wherein the central fire alarm controller 1 is a heart of a fire alarm system, and may be used to receive a fire signal and activate a fire alarm device. It can also be used to indicate the fire location and record related information. For example, a general sound and light alarm signal and a failure signal are activated, and text display, print operation and control information are transmitted to the fire alarm device. The fire alarm device may include a graphic work apparatus 2, an operation terminal 3, and the like. Optionally, the centralized fire alarm controller 1 may be disposed in the centralized fire alarm control cabinet.
The embodiment of the invention comprises a plurality of rows of centralized fire alarm controllers 1, wherein each row of centralized fire alarm controllers 1 receives data information of a corresponding area. Further, each area can be divided into a plurality of small areas, each small area can collect fire information through a fire alarm junction box 4 connected with the centralized fire alarm controller 1, each fire alarm junction box 4 is connected with a plurality of fire detectors 5, and the fire alarm junction box 4 can be used for receiving signals of the fire detectors 5. The fire detectors 5 may be distributed at different locations in each small area. And, each fire detector 5 has a different address code.
The centralized fire alarm controller 1 can judge whether a fault or a fire occurs by the address codeThe specific location of the fire detector 5 where a fire or malfunction occurs. In this embodiment, each column of centralized fire alarm controllers 1 includes a main controller 11 and a redundant controller 12, and the data information of the corresponding area received by the main controller 11 and the redundant controller 12 is the same. For example, the position of the fire detector 5 corresponding to the fire alarm connection box connected to the main controller 11 is A1Region, A2AreanAnd (4) a region. The position of the fire detector 5 corresponding to the fire alarm connection box in which the redundant controller 12 is connected to the main controller 11 is a1Region, A2AreanAnd (4) a region. That is, in A1Region, A2AreanAt least two fire detectors 5 are provided in each of the zones, and the fire detectors 5 in each of the same zones can transmit data to the main controller 11 and the redundant controller 12, respectively. In the case of no failure, the data information received by the primary controller 11 and the redundant controller 12 is the same.
The centralized fire alarm controller 1 of the nuclear island is placed in a standard cabinet, and the front and the back of the standard cabinet are required to be maintained. The centralized fire alarm controller 1 firstly synthesizes basic information on the states of circuits and various device components, which is required to check good working order of the entire system, and secondly synthesizes all fire alarms, that is: sound, light alarm and each light alarm in each detection area.
The centralized fire alarm controller 1 includes a main power supply, a standby power supply, and an auxiliary power supply.
The main power supply adopts 220V alternating current power supply. Standby power supply (centralized fire alarm controller 1 is provided with): when the main power supply fails, the emergency power supply arranged in the fire alarm control cabinet supplies power, the emergency power supply is charged for 24 hours under the condition of discharging to the termination voltage, and the capacity of the emergency power supply can provide the capacity for the controller and all other related equipment such as communication, interfaces and the like in the cabinet thereof to continuously work for 30 minutes under the alarm state after the controller and all other related equipment in the cabinet work for 8 hours under the monitoring state. The power supply is configured, so that the fire alarm system of the nuclear power plant can operate stably and reliably, and the fire-fighting linkage of the whole plant can operate smoothly. Auxiliary power supply (centralized fire alarm controller 1 with): an auxiliary alarm power supply is arranged in the cabinet and is independent of the first two power supplies, and is used for power-off alarm when the first two power supplies are both invalid, and the alarm time is not less than 1 hour.
The power supply is configured, so that the fire alarm system of the nuclear power plant can operate stably and reliably, and the fire-fighting linkage of the whole plant can operate smoothly.
The centralized fire alarm controller 1 has good compatibility, friendly interface, Chinese/English display modes and free switching. The centralized fire alarm empty box seven 1 is responsible for transmitting data from the fire detectors and the modules and making correct alarm and fault judgment. In addition, the fire alarm controller may be provided with at least three levels of password protection (and needs to be provided to the staff), corresponding to: a person on duty; a general operator; a high-level manager who has the right to modify the keys, change the password and the like. The centralized fire alarm controller 1 is internally provided with a multi-stage microprocessor and a storage system, and all data of the system can not disappear when the main power supply and the standby power supply are powered off. The centralized fire alarm controller 1 adopts a modular architecture so as to facilitate the capacity expansion of each loop. The centralized fire alarm controller 1 can also have an independent fire-fighting linkage function and retain the function of receiving linkage commands sent by other networking equipment.
The graphic work device 2 is a device capable of displaying events and alarm information of the fire alarm controller 1 in a text and graphic manner. The image-text working equipment 2 can send out total sound-light alarm signals and fault signals, and graphically display the working states of the whole fire alarm system and related fire protection systems (such as the normal work, alarm and fault of a fire detector, the switching states of a fire valve and a smoke exhaust valve, the operating conditions of a smoke exhaust fan and the like). When an alarm occurs, a flashing light signal is used for reminding on the display interface, and the color of the position indicated by the alarm on the screen is required to be changed. The printed message should be a4 size and the text content is consistent with the text content of the alarm card and the alarm card.
The image-text working equipment 2 is arranged in a main control room, a remote shutdown station and a technical support center, and each machine set is provided with a plurality of sets of image-text working equipment 2. The graphic work device 2 controls the work station based on the graphic display of a high-performance desktop industrial PC. A command center is formed by adopting special hardware and software, and all network nodes and network time can be displayed and controlled in a text and graphic mode. All information of the centralized fire alarm controller 1 can be displayed on the image-text working equipment 2, and all alarms should give an alarm to the image-text working equipment 2. Alternatively, the teletext work arrangement 2 may be a teletext workstation.
The main power supply of the image-text working equipment 2 is 220V alternating current power supply. When the main power supply fails, the standby power supply arranged in the table cabinet of the image-text working equipment 2 supplies power, the standby power supply is charged for 24 hours under the condition of discharging stopping voltage, the capacity of the standby power supply can provide that all other related equipment such as communication and interfaces in the image-text working equipment 2 and the cabinet thereof can work for 8 hours under the monitoring and control state, the standby power supply can still work for 30 shares under the alarm state, and colleagues can provide that the fire-fighting telephone host machine can work for 8 hours under the monitoring state and continue to work for 30 minutes under the conversation state. The power supply is configured, so that the fire alarm system of the nuclear power plant can operate stably and reliably, and the fire-fighting linkage of the whole plant can operate smoothly.
The operation terminal 3 can be used for confirming and resetting the alarm information of the centralized fire alarm controller, and controlling the centralized fire alarm controller 1.
The operation terminal 3 is a remote display and control panel of the centralized fire alarm controller 1 and is located in a main control room. The control of the fire alarm system by the main control room is completed through the operation terminal 3, such as sound and light alarm of fire and fault information, display and printing of information processing process and the like. In addition, the operation terminal 3 of the main control room is also provided with a switching control device of a reactor coolant pump air suction type smoke fire detector.
The operation terminal 3 is disposed in the main control room. The fire alarm system has the function of automatically and manually triggering fire alarm, and when the fire detector 5 acts, signals can be sent to the centralized fire alarm controller 1, the operation terminal 3, the image-text working equipment 2 and other display equipment. The fire alarm controller and the operation terminal can confirm and reset the alarm information.
The operation terminals are remote display and control panels of the fire alarm controller, and a plurality of operation terminals are arranged on each unit and are respectively connected with the main controller 11 and the redundant controller 12.
The plurality of image-text working devices 2 and the plurality of operation terminals 3 are connected with the multi-column centralized fire alarm controller through connecting wires. Alternatively, the connection line may be a mesh line.
The multi-column centralized fire alarm controller 1, the plurality of image-text working devices 2 and the plurality of operation terminals 3 are connected in series to form a closed loop. The multi-column centralized fire alarm controller 1, the image-text working devices 2 and the operation terminals 3 can be connected through single-mode optical fibers or RS-485 cables or multimode optical fibers. Moreover, the centralized alarm controller 1 has a self-checking function, and can perform fault detection on equipment and lines in a loop, and when the equipment or the lines of the loop have faults, the centralized alarm controller 1 can prompt a worker to confirm the following faults possibly occurring at relevant parts: short circuit, open circuit, failure of the fire detector, etc. Short-circuit isolators (single-point isolation) are arranged in the fire detectors 5, the centralized fire alarm controllers 1, the image-text working devices 2 and the operating terminals 3, and an independent short-circuit isolation module is not needed to be additionally arranged on a loop.
In addition, the data communication protocol of the system network should ensure that the system can still normally operate when one end of the line is short-circuited or short-circuited. The operation levels of each area controller and each detection point in the network can be flexibly set according to the operation requirement. The system equipment should have strong electromagnetic compatibility capability and need to meet the relevant requirements corresponding to the electromagnetic compatibility test in the relevant equipment specification. The protocol type may be: MODBUS-RTU. Therefore, no matter which node in the loop fails, the signal can still be transmitted from other connecting lines, and the fire alarm system can still work normally, so that the situation that the alarm is not timely due to the failure can be reduced, and the safety of the fire alarm system is effectively improved.
It should be noted that the field device should have a strong protection capability and can bear the influence of strong corrosion, and the corrosion should meet the relevant requirements of the specification and the field environment. The system equipment has excellent moisture resistance and can stably run for a long time under the conditions of dewing and 100 percent of humidity. The system equipment should have good grounding measures and provide specific grounding modes and requirements. Should be equipped with overvoltage protection device, should be able to conveniently dismantle, change, maintenance and debugging.
As an alternative embodiment, as shown in fig. 1, each teletext processor arrangement 2 is connected to a train of centralized fire alarm controllers 1; each operation terminal 3 is connected with one image-text working device 2; the plurality of operation terminals 3 are connected in series.
In this embodiment, each column of fire alarm controllers 1 corresponds to one image-text working device 2 and one operation terminal 3. For example, it is assumed that the fire alarm system includes a first main controller 111, a first redundant controller 121, a second main controller 112, a second redundant controller 122, a first teletext work arrangement 21, a second teletext work arrangement 22, a first operator terminal 31 and a second operator terminal 32, and that the elements are connected in series to form a loop. Wherein the first main controller 111 and the first redundant controller 121 correspond to the first teletext work arrangement 21 and the first operation terminal 31; the first teletext work arrangement 21 and the first operating terminal 31 receive messages sent by the first main controller 111 and the first redundant controller 121; the second main controller 112 and the second redundant controller 122 correspond to the second teletext work arrangement 212 and the second operation terminal 312; the second teletext work arrangement 212 and the second operator terminal 312 receive the relationship of the second main controller 112 and the second redundant controller 122. And the first main controller 111, the first redundant controller 121, the second main controller 112, and the second redundant controller 122 are connected in series.
In this way, information can be transmitted from the other connection line to the corresponding teletext work arrangement and operator terminal, regardless of a failure at either end of the loop. For example, if a fault occurs between the first main controller 111 and the first teletext work arrangement 21, the signal may be transmitted over the lines of the first main controller 111, the first redundant controller 121, the second main controller 112, the second redundant controller 122, the second teletext work arrangement 22, the second operator terminal 32, the first operator terminal 31, the first teletext work arrangement 21. The transmission of signals cannot be influenced, the fire alarm system can still work normally, and the safety of the fire alarm system is effectively improved.
As an alternative embodiment, as shown in fig. 2, each operation terminal 3 is connected to a column of centralized fire alarm controllers 1; each image-text working device 2 is connected with an operation terminal 3; the image-text working devices 2 are connected in series.
In this embodiment, each row of fire alarm controllers 1 corresponds to one operation terminal 3 and one image-text working device 2. For example, it is assumed that the fire alarm system includes a first main controller 111, a first redundant controller 121, a second main controller 112, a second redundant controller 122, a first teletext work arrangement 21, a second teletext work arrangement 22, a first operator terminal 31 and a second operator terminal 32, and that the elements are connected in series to form a loop. Wherein the first main controller 111 and the first redundant controller 121 correspond to the first teletext work arrangement 21 and the first operation terminal 31; the first teletext work arrangement 21 and the first operating terminal 31 receive messages sent by the first main controller 111 and the first redundant controller 121; the second main controller 112 and the second redundant controller 122 correspond to the second teletext work arrangement 212 and the second operation terminal 312; the second teletext work arrangement 212 and the second operator terminal 312 receive the relationship of the second main controller 112 and the second redundant controller 122. And the first main controller 111, the first redundant controller 121, the second main controller 112, and the second redundant controller 122 are connected in series. In this way, information can be transmitted from the other connection line to the corresponding teletext work arrangement and operator terminal, regardless of a failure at either end of the loop. For example, if a fault occurs between the first main controller 111 and the first operation terminal 31, the signal may be transmitted through the lines of the first main controller 111, the first redundant controller 121, the second main controller 112, the second redundant controller 122, the second operation terminal 32, the second teletext work apparatus 22, the first teletext work apparatus 21, and the first operation terminal 31. The transmission of signals cannot be influenced, the fire alarm system can still work normally, and the safety of the fire alarm system is effectively improved.
As an alternative embodiment, each fire alarm connection box 4 is connected to a plurality of fire detectors 5 (one fire alarm connection box 4 is illustrated as an example), and each fire alarm connection box 4 forms a closed loop with a corresponding plurality of fire detectors 5.
In this embodiment, the fire detector 5 is a device for detecting a fire in a nuclear power plant. The fire detector 5 is disposed at a fixed position requiring a side space and divides a detection area. The selection of the type and installation location of the fire detector 5 should take into account: according to the specific conditions (such as temperature, flame, smoke, gas flammability and the like) of the fire room or the place where the equipment is located; should be compatible with the environmental conditions at the location (e.g., accessibility, ambient temperature, ambient humidity, ionizing radiation, gas corrosiveness, space air pressure, etc.). Each fire detector 5 carries a different address code and a fire alarm connection box 4 may be connected to a plurality of fire detectors 5. The fire alarm junction box 4 and the corresponding plurality of fire detectors 5 form a closed loop which is powered by a direct current power supply and can be equipped with various types of fire detectors. Covering a defined geographical zone, and dividing the same detection loop into a plurality of different detection areas.
The type, number and location of the fire detectors 5 are selected so that the fire detection is reliable and efficient, and several different types of fire detectors can be used in the same detection area as desired. Such as smoke, flame, and temperature detectors. If the air suction type smoke fire detector is used, the smoke fire detector can be set in a main control room and display equipment to become a module, can be programmed and displayed, has a passive contact output terminal for power failure alarm, has passive contact output terminals for other fault alarm (non-power failure), and can be reset in the display equipment and remotely. All types of fire detectors 5 should be suitable for the same detection circuit. Therefore, the fire detectors 5 are connected with the fire alarm junction box only through one line, the structure is simple, and the cost is saved.
As an alternative embodiment, the fire alarm junction box 4 is connected to the central fire alarm controller 1 through a signal line.
In this embodiment, the signal line is used to transmit the signal of the fire alarm junction box 4 to the centralized fire alarm controller 1, wherein the signal line may be of various types.
Optionally, the signal line is a shielded cable. Shielded cables are transmission lines in which signal wires are wrapped with a metallic mesh braid. The braid is typically red copper or tin-plated copper. Interference signals can be prevented from entering the inner conductor to interfere, and unnecessary electromagnetic waves can be effectively filtered.
It should be noted that, the external wiring of the centralized fire alarm controller 1 of the present embodiment is made of shielded cables, and the fire detector 5 and other fire equipments should provide shielded wire terminals unless the equipment and the system of the equipment have no requirement for interference resistance and shielding and the shielded wires are supported to be suspended.
As an alternative embodiment, the fire alarm system further comprises:
a plurality of regional fire alarm controllers 6, the plurality of regional fire alarm controllers 6 forming a closed loop with the matched centralized fire alarm controller 1.
In this embodiment, the structure of the above embodiment may be used to collect fire information for a nuclear island, and a conventional island and a corresponding BOP may collect fire and fault information through the regional fire alarm controller 6. The area fire alarm controllers 6 are respectively provided in the respective areas of the conventional island and the BOP.
The plurality of regional fire alarm controllers 6 and the matched centralized fire alarm controllers 1 form a closed loop, wherein the centralized fire alarm controllers 1 can be any one or more centralized fire alarm controllers in a fire alarm system. For example, assuming that the zone fire alarm controllers 6 include the first zone fire alarm controller 61 and the second fire alarm controller 61, if the first zone fire alarm controller 61, the second zone fire alarm controller 62, and the second redundant controller 122 form a loop, the detection information of the first zone fire alarm controller 61 and the second zone fire alarm controller 62 may be transmitted to the second redundant controller 122. If the line between the first area fire alarm controller 61 and the second redundant controller 122 is failed, information cannot be transmitted. At this time, the data of the first area fire alarm controller 61 may still be transmitted through the lines of the second fire alarm controller 61, the second redundant controller 122. The information transmission of the system is not influenced. Through gathering the conflagration and the fault information in each region, can also monitor conventional island and BOP's information to, when one end circuit broke down, also can follow the other end and transmit information to concentrated fire alarm controller, improve fire alarm system's security.
In addition, the centralized fire alarm controller 1 and the plurality of regional fire alarm controllers 6 form a loop, so that a nuclear island fire alarm system and fire alarm systems such as a conventional island and a BOP (blow-off valve) are networked. The state and alarm of the conventional island fire alarm system can be displayed and alarmed in the nuclear island fire alarm system, and the nuclear island fire alarm system can perform fire-fighting linkage control on the conventional island. The centralized fire alarm controller 1 should have various standard network interfaces, and can be conveniently connected with other fire alarm controllers through optical fibers or cables (such as additionally provided with a photoelectric conversion card) to change the way. Optionally, the number of nodes allowed by the ring network formed by each fire alarm control system should not be less than 64.
As an alternative embodiment, the fire alarm system further comprises:
and a plurality of hydrogen detection devices 7, wherein each hydrogen detection device 7 is connected with the matched centralized fire alarm controller 1.
In this embodiment, the hydrogen detection device 7 can monitor the condition of the hydrogen to be set in real time. The hydrogen detection device 7 can continuously monitor each area in the nuclear island plant where hydrogen is likely to accumulate, and automatically inform operators whether hydrogen is leaked.
For example, when the hydrogen content of a certain area is higher than a set value, it is determined that hydrogen leakage occurs, and thus alarm information is issued through the concentrated fire alarm controller 1 connected to the hydrogen detection device 7 of the area. For example, assuming that the hydrogen detection device 7 is connected to the first main controller 111, when the hydrogen detection device 7 detects that the hydrogen concentration in the region detected by the first main controller 111 is greater than a set value, data is sent to the first main controller 111, and the first main controller 111 alarms through each fire alarm device (such as a graphic work device and an operation terminal). Therefore, gas leakage can be timely alarmed, workers are informed to timely handle the gas leakage, and the conditions of gas leakage, even explosion and the like in the nuclear power plant are prevented. The safety of the fire alarm system is improved.
In addition, the hydrogen gas detection device may include a main power supply and a backup power supply. The main power supply adopts 220V alternating current power supply. The standby power supply is used for automatically supplying power for 8 hours by the maintenance-free storage battery pack when the main power supply fails. The above power supply system should be equipped with overload protection and short-circuit protection devices, while being equipped with isolation devices. When any of the main and standby power supplies is insufficient, an alarm is sent out, and meanwhile acousto-optic alarm information is sent out on the image-text working equipment 2. The main power supply of the power supply cabinet adopts a 220V alternating current power supply. The standby power supply of the power supply cabinet is used for automatically supplying power for 8 hours by the maintenance-free storage battery pack when the main power supply fails, and can still continuously work for 30 minutes under the alarm state. The power supply is configured, so that the fire alarm system of the nuclear power plant can operate stably and reliably, and the fire-fighting linkage of the whole plant can operate smoothly.
As an alternative embodiment, the fire alarm system further comprises:
and a plurality of display devices (not shown) connected to the matched central fire alarm controllers 1 for displaying data information of the corresponding areas.
In this embodiment, the display device refers to a plurality of display devices distributed in a nuclear island of a nuclear power plant, and is disposed in a common area such as a main plant entrance, a corridor, an aisle, a personnel transfer area, and the like. Wherein the display device may be an in-situ simulation disk. And the fire alarm information display device is used for displaying the fire alarm information of the corresponding area. The display equipment receives the fire alarm information of the corresponding area sent by the centralized fire alarm controller 1, sends out sound and light alarm, indicates and keeps the information of the position where the fire happens; the light alarm signal cannot be manually eliminated before the centralized fire alarm controller 1 is reset; the sound alarm signal can be eliminated manually and has silencing prompt. The alarm signal reported by the display device is cleared through the image-text working device 2 after the fire is extinguished, and cannot be executed on site.
The content of the display device includes: civil engineering professional related information, building plane graphs, room numbers and the like; representing fire zones, namely representing different series of safe fire zones, non-safe fire zones, people evacuation channel fire zones and refuges by using boundaries with different colors; the status indicator light of the fire detector of each fire prevention area is in double-color display, red indicates fire alarm, red light flickers to indicate first alarm, and green indicates detector failure; the field test button is used for testing various display lamps; a power state indication; indicating the position of the present simulated disc in the figure.
The display equipment repeatedly displays the working state of the fire alarm system in the corresponding area in a graphic mode, and controls fire fighting equipment such as a fire valve, a smoke exhaust valve and the like in the area through buttons. The failure of one display device does not affect the operation of other display devices and the operation of the system. The button actions and faults of the display device (including internal faults of the display device and communication faults with the outside) should be alarmed at the matched centralized fire alarm controller. Through alarming in the display equipment in different areas respectively, the staff can be informed nearby, corresponding investigation and processing are carried out on the fire condition, and the processing efficiency of the fire can be improved.
According to the size of the display equipment and the field conditions, a floor or wall-mounted installation mode is adopted. The protection grade of the display device installed indoors is not lower than IP54, and the protection grade of the display device installed outdoors and in humid environment is not lower than IP 65. The backup time of the standby power supply of the display device is kept consistent with that of the centralized fire alarm controller, and the power failure and the device failure need to display an alarm in the centralized fire alarm controller 1.
It should be noted that the optical fiber fusion splicing boxes required by the centralized fire alarm controller 1, the display device, and the like must be installed in the equipment cabinet, and all cabinet bodies need to be painted or sprayed with plastic according to the program.
As an alternative embodiment, the fire alarm system further comprises:
and the digital instrument control equipment is connected with the plurality of centralized fire alarm controllers and is used for controlling the working state of the fire-fighting device.
In this embodiment, the digital control device is responsible for executing control of a fire valve, a smoke exhaust valve and the like related to fire protection, and sending the state information of the valves to the centralized fire alarm controller 1 for display in a main control room and display of a plurality of display devices. The hydrogen detection device 7 can send alarm information to the digital instrument control device through the centralized fire alarm controller 1. The primary alarm signal and the secondary alarm signal of each hydrogen detection device and the fault signal of each hydrogen alarm controller are sent to the digital instrument control device.
It should be noted that the environmental requirements of the embodiment of the present invention may be explosion-proof rooms. The equipment in some areas (such as a storage battery chamber and an oil storage chamber) requires to select explosion-proof equipment, wherein the temperature-sensing and smoke-sensing detectors are of intrinsic safety type. Nuclear islands are areas of nuclear safety concern. The seismic requirements for the installation of detectors and pipelines and related equipment of the system in areas of nuclear islands relevant to nuclear safety should be such as to ensure proper operation in the event of a safe shutdown earthquake. All the devices should be considered in the environment to ensure their adaptability and durability.
The fire alarm equipment is installed in each area of a nuclear island plant, wherein the fire detection equipment installed in a red area (D >0.1Sv/h, 1Sv ≈ 102rad) carries out irradiation resistance test according to a plurality of month accumulated dose: the device comprises a point type smoke detector, a temperature sensing detector 18000Gy, a temperature sensor 18000Gy and an input module 700 Gy.
For installation of the fire detector 5, there are several installation standards and bases for various detectors, depending on the environmental conditions: installation when the environmental conditions are dry; installation when the environmental conditions are humid; installation of outdoor environment; installation of difficult passages; mounting in an explosion-proof environment; pre-buried installation (suspended ceiling installation) in the office ceiling.
It is required to complete installation testing to ensure the accuracy of the location of the fire detector. Depending on the fire load, the installation test will be carried out both in the presence and in the absence of the operation of the ventilation system, and with the use of a specific flue gas generator, the flue gas generated by the flue gas generator should have the same characteristics as the room fire load and not have any adverse consequences for the other system equipment. The installation needs to meet the requirement that only simple operation is carried out, important field operation tests can be carried out on the automatic fire alarm system of the nuclear island, and the automatic fire alarm system can be checked, cleaned and overhauled.
All or part of the components of the related equipment are convenient to replace. All electrical and mechanical characteristics that affect the interchangeability of devices and the corresponding tolerance ranges should be described. The installation of the equipment should be designed to minimize the replacement time. The physical characteristics of the components or equipment involved should reduce the number of operations to be performed during installation and removal, taking into account possible replacement at a later time. The identity of the model of the device and the identity of the component should be identical for both the standby device and the installed device. In addition, the base of the detector is designed to be universal for any type of detector, for example, a point smoke detector can be replaced by a point temperature detector without any modification to the mounting.
The embodiment of the invention also needs to perform periodic test on the system, and the periodic test of the system mainly aims at: each detection device normally operates, the fire alarm controller and the components thereof normally operate, the local simulation disc normally operates, and the air suction type smoke sensing detection system between the main pumps normally operates in an automatic state and a manual state. The periodic test of the system can be carried out under the normal operation condition of the power plant, and the periodic test is completed by the detection equipment arranged in the reactor factory building during the material changing period.
The tests mainly included a true fire test, the remaining tests mainly included: the method comprises the steps of circuit non-leakage inspection, inspection of various operations for ensuring personnel and equipment safety, operation inspection of equipment components, insulation voltage resistance inspection and specific measurement function inspection. Checking the setting values of each protection device and regulator, if necessary.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A fire alarm system, characterized in that the fire alarm system comprises: the system comprises a multi-column centralized fire alarm controller, a plurality of image-text working devices and a plurality of operation terminals; the multi-column centralized fire alarm controller, the plurality of image-text working devices and the plurality of operation terminals are connected in series to form a closed loop;
the multiple rows of centralized fire alarm controllers are connected in series; each row of centralized fire alarm controllers is connected with a plurality of fire alarm junction boxes, and the fire alarm junction boxes are used for receiving signals of fire detectors; each row of centralized fire alarm controllers comprises a main controller and a redundant controller which are connected in series;
the plurality of image-text working devices and the plurality of operation terminals are connected with the multi-column centralized fire alarm controller through connecting wires in sequence.
2. A fire alarm system according to claim 1, wherein each teletext work arrangement is connected to a column of centralised fire alarm controllers; each operation terminal is connected with one image-text working device; the plurality of operation terminals are connected in series.
3. A fire alarm system according to claim 1, wherein each operation terminal is connected to a column of centralized fire alarm controllers; each image-text working device is connected with an operation terminal; the image-text working equipment is connected in series.
4. A fire alerting system as claimed in claim 1, wherein a plurality of fire detectors are connected to each fire alarm junction box.
5. A fire alerting system as claimed in claim 4, wherein each fire alarm junction box forms a closed loop with a corresponding connected plurality of fire detectors.
6. A fire alarm system according to claim 1, wherein the fire alarm junction box is connected to the central fire alarm controller by a signal line.
7. The fire alerting system of claim 6, wherein the signal line is a shielded cable.
8. A fire alerting system as claimed in claim 1, further comprising:
a plurality of regional fire alarm controllers forming a closed loop with a matching centralized fire alarm controller.
9. A fire alerting system as claimed in claim 1, further comprising:
and each hydrogen detection device is connected with the matched centralized fire alarm controller.
10. A fire alerting system as claimed in claim 1, further comprising:
and the display equipment is connected with the matched centralized fire alarm controller and is used for displaying the data information of the corresponding area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910181887.1A CN111696296A (en) | 2019-03-11 | 2019-03-11 | Fire alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910181887.1A CN111696296A (en) | 2019-03-11 | 2019-03-11 | Fire alarm system |
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| Publication Number | Publication Date |
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| CN111696296A true CN111696296A (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910181887.1A Pending CN111696296A (en) | 2019-03-11 | 2019-03-11 | Fire alarm system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112660320A (en) * | 2020-12-29 | 2021-04-16 | 招商局金陵船舶(南京)有限公司 | Water intake alarm system for ro-ro passenger ship |
| CN113362552A (en) * | 2021-06-01 | 2021-09-07 | 蚌埠依爱消防电子有限责任公司 | Method for simultaneously transmitting energy information and communication information by using optical fiber |
-
2019
- 2019-03-11 CN CN201910181887.1A patent/CN111696296A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112660320A (en) * | 2020-12-29 | 2021-04-16 | 招商局金陵船舶(南京)有限公司 | Water intake alarm system for ro-ro passenger ship |
| CN112660320B (en) * | 2020-12-29 | 2023-03-07 | 招商局金陵船舶(南京)有限公司 | Water inlet alarm system for ro-ro passenger ship |
| CN113362552A (en) * | 2021-06-01 | 2021-09-07 | 蚌埠依爱消防电子有限责任公司 | Method for simultaneously transmitting energy information and communication information by using optical fiber |
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