CN219681542U - Improved bearing fixed fire extinguishing system of conventional island steam engine of nuclear power station - Google Patents
Improved bearing fixed fire extinguishing system of conventional island steam engine of nuclear power station Download PDFInfo
- Publication number
- CN219681542U CN219681542U CN202320175465.5U CN202320175465U CN219681542U CN 219681542 U CN219681542 U CN 219681542U CN 202320175465 U CN202320175465 U CN 202320175465U CN 219681542 U CN219681542 U CN 219681542U
- Authority
- CN
- China
- Prior art keywords
- fire
- water
- pipe network
- alarm controller
- action
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 183
- 239000007921 spray Substances 0.000 claims abstract description 54
- 239000003595 mist Substances 0.000 claims abstract description 48
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 230000007613 environmental effect Effects 0.000 claims abstract description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 238000013022 venting Methods 0.000 claims 1
- 230000001629 suppression Effects 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009690 centrifugal atomisation Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Landscapes
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model relates to an improved conventional island steam turbine bearing fixed fire extinguishing system of a nuclear power station, which comprises a fire detector, a fire alarm controller, a pre-action valve group, a water distribution pipe network and a closed directional water mist spray head, wherein the fire detector and the closed directional water mist spray head are arranged in a steam turbine bearing area; when the fire alarm controller judges that a fire disaster occurs in the bearing area of the steam turbine according to the detection signal, the pre-action valve group is controlled to be conducted, the water distribution pipe network is filled with water when the pre-action valve group is conducted, the closed directional water mist spray head is opened when the environmental temperature is higher than the action temperature, and fire water in the water distribution pipe network is sprayed out to extinguish the fire. Only when the pre-action valve group acts during fire, water distribution pipe network is full of water, and the closed water mist spray head above the fire section bearing can be used for opening water, so that the influence on other non-fire section bearings is avoided, and the fire extinguishing reliability is improved.
Description
Technical Field
The utility model relates to the technical field of nuclear power stations, in particular to an improved bearing fixed fire extinguishing system of a conventional island steam turbine of a nuclear power station.
Background
The conventional island of the nuclear power station is a generic name of a steam turbine generator unit in the nuclear power station and supporting facilities and building (construction) structures thereof, the conventional island of the nuclear power station is provided with a water spray fire extinguishing system, and the water spray fire extinguishing system consists of a water source, water supply equipment, a pipeline, a rain alarm valve, a filter and a water mist spray nozzle, and sprays water mist to a protected object to extinguish fire.
Conventional in-island turbine bearing fixed fire extinguishing systems for nuclear power plants typically employ open water spray fire extinguishing systems provided with manual controls. Because the protection object is a multi-section bearing generally, water spray nozzles above all the sections of bearings can spray water when the system acts to extinguish fire. The turbine bearing is an important component of the turbine, and the mode can damage the bearing at the non-fire section, and the manual control is not beneficial to extinguishing early fire. The conventional in-island turbine bearing fixed fire extinguishing system of the nuclear power plant has the defect of low fire extinguishing reliability.
Disclosure of Invention
Based on this, there is a need to provide an improved conventional island steam turbine bearing fixed fire suppression system for nuclear power plants that can improve the reliability of fire suppression in response to the above-described problems.
The improved conventional island steam turbine bearing fixed fire extinguishing system of the nuclear power station comprises a fire detector, a fire alarm controller, a pre-action valve group, a water distribution pipe network and a closed directional water mist spray head, wherein the fire detector and the closed directional water mist spray head are arranged in a steam turbine bearing area, the fire alarm controller is connected with the fire detector and the pre-action valve group, and the water distribution pipe network is connected with the pre-action valve group and the closed directional water mist spray head;
the fire disaster detector sends a detection signal to the fire disaster alarm controller, the fire disaster alarm controller controls the pre-action valve group to be conducted when judging that a fire disaster occurs in a bearing area of the steam turbine according to the detection signal, the pre-action valve group enables the water distribution pipe network to be filled with water when being conducted, and the closed directional water mist spray head is opened when the environmental temperature is higher than the action temperature, so that fire water in the water distribution pipe network is sprayed out to extinguish the fire.
In one embodiment, the system further comprises an exhaust device arranged on the water distribution network, wherein the exhaust device is connected with the fire alarm controller; and when the fire alarm controller judges that a fire disaster occurs in the bearing area of the steam turbine according to the detection signal, the fire alarm controller also controls the starting of the exhaust device to exhaust the water distribution pipe network.
In one embodiment, the exhaust device comprises an electromagnetic valve and an exhaust valve, the exhaust valve is arranged in the water distribution pipe network, and the electromagnetic valve is arranged in the exhaust valve and is connected with the fire alarm controller.
In one embodiment, the system further comprises a fire control pipe network and a fire control water pump, wherein the pre-action valve group is connected with the fire control water pump through the fire control pipe network, and the pre-action valve group guides fire control water in the fire control pipe network to the water distribution pipe network when being conducted.
In one embodiment, the system further comprises a pressure sensor and an air pressure stabilizing device, wherein the pressure sensor is arranged on the fire-fighting pipe network, and the air pressure stabilizing device is connected with the fire-fighting pipe network to maintain the pressure of the fire-fighting pipe network; when the detection signal of the pressure sensor judges that the water pressure in the fire-fighting pipe network is reduced to a preset pressure threshold, the fire-fighting water pump is started to pressurize the water in the fire-fighting water pool to be connected into the fire-fighting pipe network.
In one embodiment, the system further comprises a remote control receiving device connected with the fire alarm controller, and the fire alarm controller controls the pre-action valve group to be conducted according to a remote control instruction received by the remote control receiving device.
In one embodiment, the system further comprises a manual drain valve disposed in the pre-action valve block.
In one embodiment, the system further comprises a pressure switch arranged on the pre-action valve group, the pressure switch is connected with the fire alarm controller, and the fire alarm controller confirms the working state of the system according to an action signal fed back by the pressure switch.
In one embodiment, the system further comprises a hydraulic alarm connected to the pre-action valve block, the hydraulic alarm giving an in situ alarm when the pre-action valve block is turned on.
In one embodiment, the system further comprises an audible and visual signal output device connected to the fire alarm controller.
According to the improved conventional island steam turbine bearing fixed fire extinguishing system of the nuclear power station, in a non-fire state, the water distribution pipe network behind the pre-action valve group is a dry pipe, water is filled in the pipe after the pre-action valve group acts only when the fire occurs, and the closed water mist spray head above the fire section bearing can be opened to discharge water, so that the influence on other non-fire section bearings is avoided, and the fire extinguishing reliability is improved.
Drawings
FIG. 1 is a schematic diagram of a turbo-generator set of a conventional island of a nuclear power plant in an embodiment;
FIG. 2 is a block diagram of a modified conventional island steam turbine bearing fixed fire suppression system for a nuclear power plant in accordance with one embodiment;
FIG. 3 is a block diagram of an improved conventional island steam turbine bearing fixed fire suppression system for a nuclear power plant in accordance with another embodiment;
fig. 4 is a schematic diagram of the operation of a modified conventional island steam turbine bearing fixed fire suppression system in a nuclear power plant in accordance with one embodiment.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
The turbine bearings refer to bearings of the turbo-generator units in the conventional island turbo-generator plants of the nuclear power plant, as shown in fig. 1, the turbo-generator units in the conventional island turbo-generator plants of the nuclear power plant are generally provided with multiple sections of bearings, and the part in a frame line X in the figure is a bearing section. According to current specifications, current turbine bearing fixed fire suppression systems typically employ open water spray fire suppression systems. Meanwhile, the specification is clear from the explanation: the turbine bearing is an important component of the turbine generator unit, and if the turbine bearing water spray fire extinguishing system is in malfunction, the bearing is quenched once, so that the deformation of the shaft can be caused, and the consequences are serious. Therefore, the specification is clear: the control mode of the open water spray fire extinguishing system of the bearing of the motor is manually controlled. The fire detector type is usually cable type linear temperature sensing and flame detector. After the fire disaster occurs and the detector signals act, the fire disaster can be manually confirmed by manually going to the site, and the system can be manually started to extinguish the fire.
The open water spray fire extinguishing system is an automatic water spray fire extinguishing system with open spray heads, and is mainly composed of a pipeline, a rain alarm valve group, a filter, an open water spray head and the like. The main components are detailed as follows: the rain alarm valve group is a device which is composed of a rain alarm valve, an electromagnetic valve, a pressure switch, a hydraulic alarm bell, a pressure gauge and a matched universal valve. The spray head is an open type high-speed centrifugal atomization type water spray nozzle, and the spray head is provided with a columnar filter screen.
According to the above, the existing domestic commonly adopted steam turbine bearing open type water spray fire extinguishing system (manual control) has the following defects: because the protection object is a multi-section bearing generally, when the system acts to extinguish fire, water spray heads above all the sections of bearings can spray water. The turbine bearing is an important component of the turbine, and the bearing of the non-fire section can be damaged in the mode. In addition, manual control is disadvantageous for extinguishing early fires.
Aiming at the current situation, the utility model provides an improved bearing fixed fire extinguishing mode of a conventional island steam engine of a nuclear power station, the system adopts a pre-action fire extinguishing system with a closed directional water mist spray nozzle, the pre-action fire extinguishing system is a closed system which is used for controlling a pre-action device by interlocking a fire automatic alarm system and a pressure switch on an air charging pipeline when water does not exist in a water distribution pipeline in a quasi-working state and supplying water to the water distribution pipeline when a fire disaster occurs, and the closed system adopts an automatic water spraying fire extinguishing system with the closed spray nozzle. Through the fixed fire extinguishing mode of the conventional island steam turbine bearing of the nuclear power station, the dry pipeline is arranged behind the valve bank in a non-fire state, water is filled in the pipeline only after the valve bank acts in a fire disaster, and the closed water mist spray nozzle above the fire section bearing bursts to discharge water, so that the influence on other non-fire section bearings is avoided, and water mist beneficial to electric oil fire extinguishing can be sprayed out.
In one embodiment, as shown in fig. 2, an improved conventional island turbine bearing fixed fire extinguishing system for a nuclear power plant is provided, which comprises a fire detector 101, a fire alarm controller 102, a pre-action valve group 103, a water distribution pipe network 104 and a closed directional water mist nozzle 105, wherein the fire detector 101 and the closed directional water mist nozzle 105 are arranged in a turbine bearing area, the fire alarm controller 102 is connected with the fire detector 101 and the pre-action valve group 103, and the water distribution pipe network 1004 is connected with the pre-action valve group 103 and the closed directional water mist nozzle 105. The fire detector 101 is used for sending a detection signal to the fire alarm controller 102, and the fire alarm controller 102 is used for controlling the pre-action valve group 103 to be conducted when the fire disaster occurs in the bearing area of the steam turbine according to the detection signal, the pre-action valve group 103 enables the water distribution network 104 to be filled with water when being conducted, and the closed directional water mist spray head 105 is opened when the environmental temperature is greater than the action temperature, so that fire water in the water distribution network 104 can be sprayed out for extinguishing fire.
Wherein, a fire detector 101 and a closed directional water mist nozzle 105 can be arranged in each steam turbine bearing area of a conventional island of the nuclear power station so as to detect fire and extinguish fire in each steam turbine bearing area. The type of the fire detector 101 is not the only type, and a cable type linear temperature sensor or a flame detector is generally adopted to monitor the environment to generate a corresponding detection signal to the fire alarm controller 102, and the fire alarm controller 102 analyzes whether a fire occurs by combining the detection signal with a preset comparison threshold value. Taking the cable type linear temperature-sensing detector as an example of the fire detector 101, when the ambient temperature reaches the action temperature of the detector, the fire alarm controller 102 judges that a fire disaster occurs according to the detection signal sent by the cable type linear temperature-sensing detector, the pre-action valve group 103 is conducted to enable the water distribution pipe network 104 to be filled with water, the closed type directional water mist spray head 105 is opened when the ambient temperature is greater than the action temperature, and fire water in the water distribution pipe network 104 is sprayed out to extinguish the fire. The specific value of the action temperature of the closed directional water mist head 105 is not unique, and may be set according to actual needs, and in this embodiment, the action temperature of the closed directional water mist head 105 is set to 141 ℃. When the fire disaster occurs in the bearing area of the automobile, the glass bubbles of the closed directional water mist nozzle 105 arranged above the bearing area of the automobile are broken and opened along with the continuous rising of the temperature of the fire source to reach the action temperature of the closed directional water mist nozzle 105, and fire water is rapidly sprayed out to extinguish the fire. In addition, the closed directional water mist nozzle 105 can specifically adopt a closed directional high-speed centrifugal atomization type water mist nozzle, spray water mist which is beneficial to the fire extinguishment of electric oil, and improve the fire extinguishment effect.
According to the improved conventional island steam turbine bearing fixed fire extinguishing system of the nuclear power station, in a non-fire state, the water distribution pipe network 104 behind the pre-action valve group 103 is a dry pipe, water is filled in the pipe after the pre-action valve group 103 acts in a fire disaster, water can be discharged only through the closed water mist nozzle 105 above the fire section bearing, the influence on other non-fire section bearings is avoided, and the fire extinguishing reliability is improved.
In one embodiment, as shown in FIG. 3, the system further comprises an exhaust device 106 disposed in the water distribution network 104, wherein the exhaust device 106 is connected to the fire alarm controller 102; when the fire alarm controller 102 judges that a fire disaster occurs in the bearing area of the steam turbine according to the detection signal, the exhaust device 106 is also controlled to be opened, and the water distribution network 104 is exhausted. The specific structure of the exhaust device 106 is not unique, in this embodiment, the exhaust device includes an electromagnetic valve and an exhaust valve, the exhaust valve is disposed in the water distribution network 104, and the electromagnetic valve is disposed in the exhaust valve and connected to the fire alarm controller 102. Specifically, a solenoid valve and a quick exhaust valve may be disposed at the highest position of the water distribution network 104, so that the pipeline can be exhausted and filled as soon as possible when the system is running. When a fire disaster occurs in the bearing area of the automobile, the fire alarm controller 102 sends an instruction to the electromagnetic valve, and the electromagnetic valve drives the exhaust valve to open for exhausting, so that the control is quick and reliable.
In one embodiment, with continued reference to fig. 3, the system further includes a fire-fighting pipe network 107 and a fire-fighting water pump 108, the pre-action valve group 103 being connected to the fire-fighting water pump 108 through the fire-fighting pipe network 107, the pre-action valve group 103, when turned on, directing fire-fighting water in the fire-fighting pipe network 107 to the water distribution pipe network 104. Specifically, when no fire occurs in the bearing area of the steam turbine, the fire-fighting water pump 108 is turned off, the fire-fighting water is stored in the fire-fighting pipe network 107 at the front end of the pre-action valve group 103, and the water distribution pipe network 104 at the rear end of the pre-action valve group 103 is a dry pipe, so that erroneous spraying is prevented. When a fire occurs in the bearing area of the turbine, the pre-action valve set 103 is conducted to guide fire water in the fire-fighting pipe network 107 to the water distribution pipe network 104, so that a temporary wet system is formed. As the temperature at the fire source continues to rise, the glass bubbles of the closed directional water mist nozzle 105 arranged above the bearing area of the steam turbine are broken and opened, and fire water is rapidly sprayed out to extinguish fire.
Further, in one embodiment, the system further comprises a pressure sensor and an air pressure stabilizing device 109, wherein the pressure sensor is arranged on the fire-fighting pipe network 107, the air pressure stabilizing device 109 is connected with the fire-fighting pipe network 107, and the pressure of the fire-fighting pipe network 107 is maintained at a certain value; when the detection signal of the pressure sensor judges that the water pressure in the fire-fighting pipe network 107 is reduced to a preset pressure threshold value, the fire-fighting water pump 108 is started to pressurize the water in the fire-fighting water pool to be connected into the fire-fighting pipe network 107. The specific value of the preset pressure threshold is not unique, and can be set according to actual conditions. The air pressure stabilizer 109 serves as emergency fire water for maintaining a stable water pressure of the fire-fighting pipe network 107 and a moment when the fire-fighting water pump 108 is started. When the water mist spray nozzle sprays fire, and the water pressure in the fire pipe network 107 drops to a preset pressure threshold value, the fire water pump 108 is started to supplement fire water for the fire pipe network 107. Specifically, the pressure sensor may be connected to a control cabinet of the fire pump 108, and the control cabinet receives a detection signal of the pressure sensor and starts the fire pump 108 when it is detected that the water pressure in the fire pipe network 107 drops to a preset pressure threshold.
In one embodiment, the system further comprises a remote control receiving device 110 connected to the fire alarm controller 102, and the fire alarm controller 102 controls the pre-action valve group 103 to be conducted according to a remote control command received by the remote control receiving device 110. Further, after the remote control receiving device 110 receives the remote control instruction, the fire alarm controller 102 controls the pre-action valve group 103 to be turned on, and also controls the air exhaust device 106 to open to exhaust the water distribution network 104. In special cases, firefighters can send instructions to open the pre-action valve group 103 and the exhaust device 106 through the remote control terminal, so that the rear pipeline of the pre-action valve group 103 can be filled with water rapidly, and water is sprayed to extinguish the fire after the closed directional water mist spray head 105 is opened. The remote control terminal can be a mobile phone, a wearable device and the like. Further, in one embodiment, the system further comprises a manual drain valve disposed in the pre-action valve block 103. In special cases, fire fighters can also open a manual water drain valve at the position of the pre-action valve group 103 to perform on-site emergency mechanical opening, so that the rear pipeline of the pre-action valve group 103 can be rapidly filled with water, and water is sprayed to extinguish the fire after the closed directional water mist spray head 105 is opened.
In one embodiment, the system further comprises a pressure switch arranged on the pre-action valve group 103, the pressure switch is connected with the fire alarm controller 102, and the fire alarm controller 102 confirms the working state of the system according to an action signal fed back by the pressure switch. Specifically, the pressure switch feedback action signal is different according to whether the pre-action valve group 103 is in an open or closed state, and the fire alarm controller 102 can determine whether the pre-action valve group 103 is open according to the pressure switch feedback action signal. Further, the fire alarm controller 102 also receives an air low-pressure alarm signal and an overhaul signal butterfly valve position signal which are fed back to the pre-action valve group 103, and confirms the working state of the pre-action system by combining the three signals.
In one embodiment, the system further comprises a hydraulic alarm connected to the pre-action valve block 103, the hydraulic alarm alerting the pre-action valve block 103 in situ when it is turned on. Specifically, the main outlet of the pre-action valve group 103 is connected with a water distribution network 104, and the pre-action valve group 103 is also connected with a hydraulic alarm bell through a branch. The pre-action valve group 103 enables the water distribution pipe network 104 to be filled with water after being conducted, and meanwhile, water is output to the hydraulic alarm bell through the branch, so that the hydraulic alarm bell is triggered to alarm on site. Furthermore, in one embodiment, the system also includes an audible and visual signal output device coupled to the fire alarm controller 102. When the fire alarm controller 102 judges that a fire occurs in the bearing area of the steam turbine, the fire alarm controller 102 also controls the sound and light signal output device to output sound and light signals for alarm so that operators can know the sound and light signals in time.
In order to facilitate a better understanding of the improved conventional island steam turbine bearing fixed fire suppression system of a nuclear power plant described above, a detailed explanation will be provided below in connection with specific embodiments.
The utility model provides an improved conventional island gas turbine bearing fixed fire extinguishing system mode of a nuclear power plant, which mainly aims at: (1) On the premise of meeting the fire extinguishing requirement, the influence on the unit is reduced: when fire occurs, only the water mist spray nozzle above the fire section bearing is used for discharging water to extinguish the fire, and the influence on other non-fire section bearings is avoided. (2) An automatic control mode is adopted to extinguish early fire as soon as possible.
The improved conventional island gas machine bearing fixed fire extinguishing system of the nuclear power plant adopts a pre-acting fire extinguishing system with a closed directional water mist spray nozzle, a dry pipeline is arranged behind a valve group in a non-fire state, water is filled in the pipeline after the valve group acts in fire, the closed water mist spray nozzle above a fire section bearing bursts to discharge water, the influence on other non-fire section bearings is avoided, and water mist which is beneficial to the fire extinguishment of electrical oil can be sprayed.
As shown in fig. 4, the fire extinguishing system mainly comprises a pipeline, a pre-action alarm valve group, a filter, a closed directional high-speed centrifugal atomization type water mist spray head and the like. Wherein, the action temperature of the closed directional water mist nozzle is primarily supposed to be 141 ℃.
Under normal conditions, the air pressure in the control pipeline of the pre-acting valve group enables the valve group to be kept in a closed state, and meanwhile, the air automatic supply system matched with the pre-acting valve group maintains the air pressure in the water distribution pipe network behind the valve group. When the fire detector detects the occurrence of fire in the bearing area of the automobile, the fire alarm controller is linked to open the control electromagnetic valve and the exhaust valve, the air pressure in the pipe network is reduced along with the control electromagnetic valve and the exhaust valve, and the fire alarm controller simultaneously controls the pre-action valve group to be quickly opened, so that the pipeline behind the valve is filled with water, and the temporary wet system is formed. Along with the continuous rising of the temperature of the fire source (to about 141 ℃ in the initial assumption), the glass bubbles of the closed directional water mist nozzle arranged above the bearing area of the automobile are broken and opened, fire water is rapidly sprayed out to extinguish fire, and meanwhile, the hydraulic alarm bell is matched for on-site alarm. The pressure switch action signal, the air low-pressure alarm signal and the overhaul signal of the valve bank of the pre-action valve are fed back to the fire alarm controller to confirm the working state of the pre-action system. Under special conditions, firefighters can also remotely open the control electromagnetic valve on each level of monitoring discs, or open a manual water drain valve (namely, open on-site emergency machinery) at a pre-action valve group station, so that a pipeline behind the alarm valve can be rapidly filled with water, and water is sprayed to extinguish fire after the closed directional water mist spray nozzle is opened.
The air pressure stabilizing device is used as emergency fire-fighting water for maintaining stable water pressure of the fire-fighting pipe network and starting moment of the fire-fighting pump. When the water pressure in the fire-fighting pipe network drops to a certain value during the fire-extinguishing of the water spray nozzle, the fire pump is automatically started in an interlocking way. The electromagnetic valve and the quick exhaust valve are arranged at the highest position of each set of water distribution pipe network of the pre-acting facility, so that the pipeline can be exhausted and filled with water as soon as possible when the system operates, and in addition, the tail end water testing devices can be arranged at the positions of each closed directional water mist spray head, so that the reliability of the system can be tested.
According to the improved conventional island steam turbine bearing fixed fire extinguishing system of the nuclear power station, only the water mist spray heads above the fire section bearings are used for discharging water to extinguish fire in a fire disaster, and the influence on other non-fire section bearings is avoided. The impact on the unit will be minimal. The pre-action system is adopted, and a dry pipeline is arranged behind the valve group in a non-fire state, so that misspraying is prevented. Meanwhile, an automatic control mode is adopted to extinguish early fire as soon as possible. The closed directional high-speed centrifugal atomizing type water mist nozzle is adopted to spray water mist which is beneficial to the extinguishment of electric oil. The system combines the pre-action system and the water spray system into a whole by adopting the pre-action fire extinguishing system with the closed directional water spray nozzle, so that the influence on a unit is reduced to the minimum on the premise of meeting the fire extinguishing requirement.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The improved conventional island steam turbine bearing fixed fire extinguishing system for the nuclear power station is characterized by comprising a fire detector, a fire alarm controller, a pre-action valve group, a water distribution pipe network and a closed directional water mist spray head, wherein the fire detector and the closed directional water mist spray head are arranged in a steam turbine bearing area, the fire alarm controller is connected with the fire detector and the pre-action valve group, and the water distribution pipe network is connected with the pre-action valve group and the closed directional water mist spray head;
the fire disaster detector sends a detection signal to the fire disaster alarm controller, the fire disaster alarm controller controls the pre-action valve group to be conducted when judging that a fire disaster occurs in a bearing area of the steam turbine according to the detection signal, the pre-action valve group enables the water distribution pipe network to be filled with water when being conducted, and the closed directional water mist spray head is opened when the environmental temperature is higher than the action temperature, so that fire water in the water distribution pipe network is sprayed out to extinguish the fire.
2. The system of claim 1, further comprising an exhaust device disposed in the water distribution network, the exhaust device being coupled to the fire alarm controller; and when the fire alarm controller judges that a fire disaster occurs in the bearing area of the steam turbine according to the detection signal, the fire alarm controller also controls the starting of the exhaust device to exhaust the water distribution pipe network.
3. The system of claim 2, wherein the venting device comprises a solenoid valve and a vent valve, the vent valve is disposed in the water distribution network, and the solenoid valve is disposed in the vent valve and is connected to the fire alarm controller.
4. The system of claim 1, further comprising a fire pipe network and a fire pump, wherein the pre-action valve set is connected to the fire pump through the fire pipe network, and wherein the pre-action valve set directs fire water in the fire pipe network to the water distribution network when turned on.
5. The system of claim 4, further comprising a pressure sensor disposed in the fire pipe network and a pressure stabilizing device connected to the fire pipe network to maintain the pressure of the fire pipe network; when the detection signal of the pressure sensor judges that the water pressure in the fire-fighting pipe network is reduced to a preset pressure threshold, the fire-fighting water pump is started to pressurize the water in the fire-fighting water pool to be connected into the fire-fighting pipe network.
6. The system of any one of claims 1-5, further comprising a remote control receiving device coupled to the fire alarm controller, the fire alarm controller controlling the pre-action valve block to conduct in accordance with a remote control command received by the remote control receiving device.
7. The system of any one of claims 1-5, further comprising a manual drain valve disposed in the pre-action valve block.
8. The system of any one of claims 1-5, further comprising a pressure switch disposed in the pre-action valve block, the pressure switch being coupled to the fire alarm controller, the fire alarm controller confirming a system operating condition based on an action signal fed back by the pressure switch.
9. The system of any one of claims 1-5, further comprising a hydraulic alarm connected to the pre-action valve block, the hydraulic alarm alerting in situ when the pre-action valve block is turned on.
10. The system of any one of claims 1-5, further comprising an audible and visual signal output device coupled to the fire alarm controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320175465.5U CN219681542U (en) | 2023-02-02 | 2023-02-02 | Improved bearing fixed fire extinguishing system of conventional island steam engine of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320175465.5U CN219681542U (en) | 2023-02-02 | 2023-02-02 | Improved bearing fixed fire extinguishing system of conventional island steam engine of nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219681542U true CN219681542U (en) | 2023-09-15 |
Family
ID=87965663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320175465.5U Active CN219681542U (en) | 2023-02-02 | 2023-02-02 | Improved bearing fixed fire extinguishing system of conventional island steam engine of nuclear power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219681542U (en) |
-
2023
- 2023-02-02 CN CN202320175465.5U patent/CN219681542U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201612961U (en) | Fire extinguishing plant and fire extinguishing system for wind power generator cabin | |
| CN104524734A (en) | Method and device for collecting data information of fire fighting device system | |
| CN101485926B (en) | Fire-fighting smoke alarm and automatic spray linked system, and working method thereof | |
| CN109893818A (en) | A kind of automatic fire alarm system based on big data | |
| CN201299918Y (en) | Fire water supply equipment online monitor device | |
| CN219681542U (en) | Improved bearing fixed fire extinguishing system of conventional island steam engine of nuclear power station | |
| CN215309892U (en) | High-pressure water mist fire extinguishing system with pressure and liquid level monitoring function | |
| CN116236733A (en) | Improved bearing fixed fire extinguishing system of conventional island steam engine of nuclear power station | |
| CN112002096A (en) | Vehicle-mounted fire alarm controller for rail transit | |
| CN219896881U (en) | Linkage superfine dry powder fire extinguishing equipment for ground garage | |
| CN217548844U (en) | Cooling and fire extinguishing suppression system for electrochemical energy storage cabin | |
| CN213724586U (en) | Intelligent water fire control system | |
| CN112870615A (en) | Fire extinguishing control method for compressed air foam system | |
| JP4424570B2 (en) | Sprinkler fire extinguishing equipment | |
| JPH105365A (en) | Sprinkler fire extinguishing equipment | |
| CN219941641U (en) | Pumped storage generator motor with fire extinguishing system | |
| CN114272531A (en) | Water fire control system and method for main transformer of transformer substation | |
| JP2004290430A (en) | Sprinkler fire-fighting facility | |
| JP4553220B2 (en) | Sprinkler fire extinguishing equipment | |
| CN113144487A (en) | Building outer wall external insulation automatic fire extinguishing system | |
| JP4481412B2 (en) | Sprinkler fire extinguishing equipment | |
| CN219140521U (en) | Pipe network leakage monitoring device | |
| CN220471826U (en) | Fire-fighting machinery smoke protection and exhaust Internet of things management system | |
| CN221831534U (en) | Energy storage fire extinguishing system | |
| CN217311745U (en) | Combined automatic control device of fire-fighting preaction automatic fire extinguishing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |