Main pump fire alarm detection device and detection method

Abstract

The invention discloses a main pump fire alarm detection device and method. The main pump fire alarm detection device is deployed in a reactor building, and the reactor building comprises an area where a main pump is located and an area where a non-main pump is located; the main pump fire alarm detection device comprises at least one of an air sampling detection device and an infrared flame detection device with a standby branch; the air sampling detection device is arranged in an area where the main pump is not located, and comprises a sampling air pipe connected to the area where the main pump is located; the infrared flame detection device with the standby branch comprises a flame detector, a junction box and a fire alarm controller which are connected in sequence; the flame detector is arranged in the area where the main pump is located, and the junction box and the fire alarm controller are arranged in the area where the non-main pump is located. According to the invention, the accuracy and timeliness of fire alarm detection can be ensured, the dose radiation suffered by maintenance personnel can be reduced to the greatest extent, and the overall safety and reliability of a fire alarm detection system can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power plant production operation, and particularly relates to a main pump fire detection device and a detection method. Background Art

[0002] All kinds of detectors of the JDT (fire detection system) are distributed throughout the entire nuclear power plant, just like the "fiery eyes" implanted in each major plant building, constantly monitoring the fire safety of the nuclear power plant. As the most critical building in the nuclear power plant, the fire safety of the reactor building is of utmost importance. During the normal operation of the nuclear power plant, the environment where the fire detectors in the reactor building are located is extremely complex, and the on-site laying range is extensive, and it is necessary to face the influence of harsh conditions such as high temperature, dust, and radiation. In addition, the reactor building is completely enclosed by the containment during normal operation. Therefore, if a detector in the radiation red zone (such as the area where the main pump is located) fails, it will face the problem of being unable to enter for maintenance.

[0003] The minimum requirement for the radiation resistance of the nuclear island fire alarm system is that during the operation of 18 months, false alarms or functional failures shall not be caused by radiation factors. Among them, as the core equipment of the reactor building, the main pump has a relatively high radiation level in the environment where it is located during normal operation (see a radiation zoning map in the Figure 1 example). Therefore, the fire detectors in the area where the main pump is located must have higher radiation resistance. For the fire detection in the area where the main pump is located, how to ensure the long-term reliable operation of the detector and avoid false alarms or functional failures is a technical problem that needs to be solved urgently at present. Summary of the Invention

[0004] The purpose of the present invention is to provide a main pump fire detection device and a detection method, aiming to solve the problem of how to ensure the long-term reliable operation of the detector and avoid false alarms or functional failures when dealing with the fire detection in the area where the main pump is located.

[0005] To solve the above technical problems, the purpose of the present invention is achieved through the following technical solutions: Provide a main pump fire detection device deployed in the reactor building, and the reactor building includes an area where the main pump is located and an area where the main pump is not located; the main pump fire detection device includes at least one of an air sampling detection device and an infrared flame detection device with a standby branch;

[0006] Wherein, the air sampling detection device is arranged in the area where the main pump is not located, and the air sampling detection device includes a sampling air duct connected to the area where the main pump is located;

[0007] Among them, the infrared flame detection device with a standby branch includes a flame detector, a junction box, and a fire alarm controller that are connected in sequence; the flame detector is arranged in the area where the main pump is located, and the junction box and the fire alarm controller are arranged in the area where the main pump is not located.

[0008] Furthermore, the air sampling detection device further includes:

[0009] A smoke sensing analysis component, connected to the sampling air duct, and used for detecting smoke in the air sample collected from the area where the main pump is located by the sampling air duct;

[0010] An air extraction pump, connected to the smoke sensing analysis component, and used for pumping the air sample in the area where the main pump is located to the smoke sensing analysis component through the sampling air duct.

[0011] Furthermore, the smoke sensing analysis component includes:

[0012] A smoke detector, connected to the sampling air duct;

[0013] A flow meter, arranged at the connection between the sampling air duct and the smoke detector.

[0014] Furthermore, the number of the smoke sensing analysis components is the same as the number of floors between layers in the area where the main pump is located; one of the smoke sensing analysis components is connected to one of the layers in the area where the main pump is located through one of the sampling air ducts.

[0015] Furthermore, the number of smoke detectors in each of the smoke sensing analysis components is multiple.

[0016] Furthermore, multiple air extraction pumps are provided, and each air extraction pump is connected to all the smoke sensing analysis components through pipelines.

[0017] Furthermore, multiple flame detectors are provided and distributed at multiple positions in the area where the main pump is located; among them, some of the multiple flame detectors are on-line flame detectors, and the rest are standby flame detectors;

[0018] The junction box is switched and connected to the on-line flame detector and the standby flame detector.

[0019] Furthermore, a smoke sensor probe is added to the flame detector, the smoke sensor probe is connected to the fire alarm controller, and the smoke sensor probe is used to trigger the fire alarm controller to send out a fire alarm signal when detecting smoke.

[0020] An embodiment of the present invention also provides a main pump fire alarm detection method, which is applied to the main pump fire alarm detection device as described above. When the main pump fire alarm detection device adopts the air sampling detection device, the main pump fire alarm detection method includes:

[0021] Start the air extraction pump to suck an air sample from the area where the main pump is located through the sampling air duct and transport it to the smoke analysis component;

[0022] Detect whether there are smoke particles in the air sample through the smoke analysis component. If so, trigger a fire alarm signal; if not, continue the detection.

[0023] An embodiment of the present invention further provides a main pump fire detection method, which is applied to the main pump fire detection device as described above. When the main pump fire detection device adopts an infrared flame detection device, the main pump fire detection method includes:

[0024] Detect specific infrared light wavelengths at multiple positions in the area where the main pump is located through multiple on-line flame detectors;

[0025] When specific infrared light wavelengths are detected at any position, trigger a fire alarm signal through the fire alarm controller;

[0026] Switch the control of the junction box so that its connection changes from being connected to the on-line flame detector to being connected to the standby flame detector.

[0027] The beneficial effects of the embodiment of the present invention are as follows:

[0028] When an air sampling detection device is adopted, the air sample in the area where the main pump is located is transmitted through the sampling air duct to the air sampling detection device in the area other than the area where the main pump is located (preferably the low-radiation area) for analysis, which can avoid false alarms caused by the influence of high-dose radiation on the electrical components of the air sampling detection device and improve the reliability of the main pump fire detection. In addition, when the air sampling detection device needs to be maintained, the maintenance personnel only need to reach the low-radiation area to carry out the maintenance, which can reduce the dose radiation of the maintenance personnel.

[0029] When an infrared flame detection device with a standby branch is adopted, the flame detector is set in the area where the main pump is located, which can directly monitor the flame situation of the main pump and its surrounding environment, improving the accuracy and timeliness of fire detection; at the same time, the junction box and the fire alarm controller are set in the area other than the area where the main pump is located, avoiding the influence of adverse factors such as high temperature and radiation generated by the operation of the main pump on the junction box and the fire alarm controller, thus ensuring the stability and reliability of the device. In addition, the setting of the standby branch further improves the redundancy and safety of the detection device. Even if a certain branch fails, the maintenance personnel only need to reach the low-radiation area to carry out the maintenance and standby branch switching, which can reduce the dose radiation of the maintenance personnel. Description of the Drawings

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0031] Figure 1 It is an exemplary diagram of radiation zoning for the reactor building provided by an embodiment of the present invention.

[0032] Figure 2 It is a schematic structural diagram of the air sampling detection device provided by an embodiment of the present invention.

[0033] Figure 3 It is a schematic diagram of the system principle structure of air sampling detection provided by an embodiment of the present invention.

[0034] Figure 4 It is a schematic flowchart of a process in the main pump fire detection method provided by an embodiment of the present invention.

[0035] Figure 5 It is another schematic flowchart of a process in the main pump fire detection method provided by an embodiment of the present invention.

[0036] Explanation of the markings in the figure:

[0037] 1. Sampling air duct; 2. Smoke sensing analysis component; 21. Flowmeter; 22. Smoke detector; 3. Air extraction pump; 4. Valve. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0039] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0040] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0041] It should be further understood that the term "and / or" used in the description and appended claims of the present invention refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0042] Please refer to Figure 1 , Figure 1 , which is an example diagram of radiation zoning for the reactor building provided by an embodiment of the present invention. Figure 1 In the figure, the red area is the high-radiation area, and the irradiation dose rate can reach up to 0.5 Sv / h at most; the orange area is the medium-radiation area, and the irradiation dose rate can reach up to 100 mSv / h at most; the yellow area is the low-radiation area, and the irradiation dose rate can reach up to 2 mSv / h at most.

[0043] Please refer to Figure 2 and Figure 3 , an embodiment of the present invention provides a main pump fire detection device deployed in the reactor building. The reactor building includes the area where the main pump is located (i.e., Figure 1 the high-radiation area shown in the example) and the area where the main pump is not located (i.e., Figure 1 the medium-radiation area and the low-radiation area shown in the example); the main pump fire detection device includes at least one of an air sampling detection device and an infrared flame detection device with a standby branch.

[0044] Among them, the air sampling detection device is arranged in the area where the main pump is not located. The air sampling detection device includes a sampling air duct 1 connected to the area where the main pump is located;

[0045] Among them, the infrared flame detection device with a standby branch includes a flame detector, a junction box, and a fire alarm controller connected in sequence; the flame detector is arranged in the area where the main pump is located, and the junction box and the fire alarm controller are arranged in the area where the main pump is not located.

[0046] In this embodiment, when the air sampling detection device is adopted, the air sample in the area where the main pump is located is transmitted through the sampling air duct 1 to the air sampling detection device in the area where the main pump is not located (preferably the low-radiation area, i.e., the yellow area) for analysis, which can avoid false alarms caused by the influence of high-dose radiation on the electrical components of the air sampling detection device and improve the reliability of main pump fire detection. In addition, when the air sampling detection device needs to be maintained, the maintenance personnel only need to reach the low-radiation area for maintenance, which can reduce the dose radiation of the maintenance personnel.

[0047] In this embodiment, when an infrared flame detection device with a standby branch is adopted, the flame detector is arranged in the area where the main pump is located, which can directly monitor the flame conditions of the main pump and its surrounding environment, improving the accuracy and timeliness of fire alarm detection. At the same time, the junction box and the fire alarm controller are arranged in the area where the main pump is not located (preferably in the low-radiation area, i.e., the yellow area), avoiding the influence of adverse factors such as high temperature and radiation generated by the operation of the main pump on the junction box and the fire alarm controller, thus ensuring the stability and reliability of the device. In addition, the setting of the standby branch further improves the redundancy and safety of the detection device. Even if a certain branch fails, the maintenance personnel only need to reach the low-radiation area to carry out maintenance and standby branch switching, which can reduce the dose radiation of the maintenance personnel.

[0048] Based on this, no matter which one of the above two main pump fire alarm detection devices is selected, or two sets of devices are used together to work in coordination, it can ensure the accuracy and timeliness of fire alarm detection while minimizing the dose radiation received by the maintenance personnel and improving the overall safety and reliability of the fire alarm detection system. This design not only reflects the concern for personnel safety but also demonstrates an in-depth understanding and optimization of the equipment operating environment. Through reasonable layout and configuration, the main pump fire alarm detection system can still maintain an efficient and stable working state in a harsh environment, providing a strong guarantee for the safe operation of the nuclear power plant.

[0049] Please continue to refer to Figure 2 and Figure 3 , and the structure and working process of the air sampling detection device will be specifically introduced below.

[0050] In one embodiment, the air sampling detection device further includes a smoke analysis component 2 and an air extraction pump 3; the smoke analysis component 2 is connected to the sampling air duct 1, and the smoke analysis component 2 is used to detect the smoke in the air sample collected from the area where the main pump is located by the sampling air duct 1; the air extraction pump 3 is connected to the smoke analysis component 2, and the air extraction pump 3 is used to pump the air sample from the area where the main pump is located through the sampling air duct 1 to the smoke analysis component 2.

[0051] In this embodiment, the sampling air duct 1, the smoke analysis component 2, and the air extraction pump 3 are connected in sequence to form an air flow path. One end of the sampling air duct 1 is in the area where the main pump is located, and the smoke analysis component 2 is in the area where the main pump is not located and is connected to the other end of the sampling air duct 1. After the air extraction pump 3 is started, the air sample from the area where the main pump is located can be sucked into one end of the sampling air duct 1 and enter the smoke analysis component 2 from the other end of the sampling air duct 1 for smoke concentration detection, and the detected air sample is discharged after passing through the air extraction pump 3.

[0052] In this embodiment, a plurality of air inlet holes facing different directions may be formed at one end of the sampling air duct 1 to ensure that air samples can be inhaled from multiple directions, thereby improving the accuracy of smoke detection. In addition, the design of the plurality of air inlet holes can make the flow of the air samples in the sampling air duct 1 more uniform, avoiding the influence of too high or too low local concentration on the detection result.

[0053] In one embodiment, the smoke sensing and analyzing component 2 includes a smoke detector 22 and a flow meter 21; the smoke detector 22 is connected to the sampling air duct 1; the flow meter 21 is arranged at the connection between the sampling air duct 1 and the smoke detector 22.

[0054] In this embodiment, the flow meter 21 is used to monitor the air flow rate in the sampling air duct 1, and a fault signal is sent when the air flow rate is lower or higher than the set value. If the air extraction pump 3 fails and causes a sudden drop in the flow rate, the flow meter 21 should also send a fault signal.

[0055] Specifically, the number of smoke detectors 22 in the smoke sensing and analyzing component 2 is multiple. The multiple smoke detectors 22 are used simultaneously, which can avoid the risk of the entire smoke sensing and analyzing component 2 failing due to the failure of a single smoke detector 22. It should be noted that the number of smoke detectors 22 is not specifically limited and can be set according to actual needs.

[0056] In one embodiment, there are multiple interlayers in the area where the main pump is located. In order to detect each interlayer, the number of smoke sensing and analyzing components 2 is the same as the number of interlayers in the area where the main pump is located. One smoke sensing and analyzing component 2 is connected to one of the layers in the area where the main pump is located through a sampling air duct 1.

[0057] In this embodiment, each smoke sensing and analyzing component 2 works independently and monitors the smoke concentration of the respective connected interlayer in real time. When the smoke detection of a certain interlayer exceeds the preset set value, the fire alarm signal of that interlayer is confirmed by the detection information of the corresponding smoke sensing and analyzing component 2. In addition, in order to ensure the high reliability and accuracy of the system, all smoke sensing and analyzing components 2 are connected to the central monitoring system, which can receive and display the smoke detection data of each interlayer in real time.

[0058] In one embodiment, there are multiple air extraction pumps 3, and each air extraction pump 3 is connected to all smoke sensing and analyzing components 2 through a pipeline.

[0059] In this embodiment, all the smoke detection components 2 share these air extraction pumps 3 to ensure the uniform extraction and analysis of air samples. Each air extraction pump 3 has high efficiency and can quickly respond and extract air samples from each layer in the area where the main pump is located, and then transport them to the corresponding smoke detection components 2 for smoke analysis respectively. In addition, the design of multiple air extraction pumps 3 also enhances the redundancy of the device. Even if one of the air extraction pumps 3 fails, the other air extraction pumps 3 can still continue to work, ensuring the continuous operation of the system and the accuracy of the data. It should be noted that only one of the multiple air extraction pumps 3 needs to be turned on each time. A micro switch can be set on each air extraction pump 3 to control its opening and closing. In addition, a corresponding valve 4 is provided at the rear end of each air extraction pump 3, and the opening and closing of the valve 4 are synchronized with that of the air extraction pump 3.

[0060] Please continue to refer to Figure 3 , based on the structure and working process of the air sampling detection device introduced above; in a specific example scenario, assume that there are three layers with heights of 8m, 11m, and 16m in the area where the main pump is located (corresponding to Figure 3 the first floor of the main pump room, the second floor of the main pump room, and the third floor of the main pump room in

[0061] . Correspondingly, the air sampling detection device of the present invention can be provided with 3 sampling air ducts 1, 3 smoke detection components 2, and 2 air extraction pumps 3.

[0062] Among them, the 3 sampling air ducts 1 are respectively used to connect the three layers in the area where the main pump is located and the 3 smoke detection components 2, so as to realize the independent detection of the air samples in the three layers by transporting them to the 3 smoke detection components 2 respectively.

[0062] Among them, each smoke detection component 2 includes 1 flow meter 21 and 2 smoke detectors 22 (i.e., Figure 3 the detector 1 and detector 2 in

[0063] . Among them, the 2 air extraction pumps 3 (i.e., Figure 3 the extraction fan column A and extraction fan column B in Figure 3 Figure 3 are connected to the 3 smoke detection components 2 through the same pipeline. The opening and closing and operation power adjustment of the 2 air extraction pumps 3 can be controlled by the SAM cabinet. The SAM cabinet can be set outside the reactor building or in the area where the main pump is not located. The SAM cabinet is provided with a remote / local fan operation control panel to realize the control of the air extraction pump 3. The remote / local fan operation control panel sends an opening and closing instruction to the air extraction pump 3 through the control card to realize the opening and closing of the air extraction pump 3; the remote / local fan operation control panel sends an adjustment instruction to the air extraction pump 3 through the adjustment card to realize the operation power adjustment of the air extraction pump 3.

[0064] Among them, the detection data of the air samples by the 3 smoke detection components 2 are all transmitted to the fire alarm control host through the input module for smoke analysis.

[0065] The above scenario is a preferred embodiment of this application. In actual applications, the configuration and parameters of the air sampling detection device can be flexibly adjusted according to different scenarios and requirements.

[0066] The following specifically introduces the structure and working process of the infrared flame detection device with a standby branch.

[0067] In one embodiment, multiple flame detectors are provided and distributed at multiple positions in the area where the main pump is located; some of the multiple flame detectors are on-line flame detectors, and the rest are standby flame detectors; the junction box is switchably connected to the on-line flame detectors and the standby flame detectors.

[0068] In this embodiment, the on-line flame detector is used to monitor the situation in the area where the main pump is located in real time. Once a flame signal is detected, the alarm system is immediately triggered to ensure timely response. The standby flame detector is in a standby state. When the on-line flame detector fails or needs maintenance, it can be quickly switched to the standby flame detector through the junction box to ensure the continuity of the monitoring work. This not only improves the reliability of flame detection but also effectively avoids the occurrence of monitoring blind spots due to detector failures.

[0069] In some embodiments, the flame detector can detect the specific infrared light wavelength emitted by the combustion flame (using a photocell to detect visible light and infrared light that changes at a frequency of 5 - 25 Hz), but is insensitive to other light sources. Therefore, it can be used in occasions with X-rays and γ-rays, with high reliability and few false alarms, but it can only detect open flames. Based on this, a smoke detector probe can be added to the flame detector. The smoke detector probe is connected to the fire alarm controller, and the smoke detector probe is used to trigger the fire alarm controller to send a fire alarm signal when detecting smoke.

[0070] Specifically, multiple smoke detector probes can be set and distributed at different positions in the area where the main pump is located. Some of them are on-line smoke detector probes, and the rest are standby smoke detector probes. When the on-line smoke detector probe fails, maintenance personnel can manually connect the standby smoke detector probe to the detection circuit in the area outside the main pump (low radiation area, i.e., yellow area) using the junction box and withdraw the original on-line smoke detector probe. Based on this, multiple fire detections are carried out through the added smoke detector probes, improving the accuracy and reliability of fire monitoring. The smoke detector probe and the flame detector work together to quickly respond and trigger a fire alarm signal at the initial stage of a fire, that is, when smoke is generated.

[0071] Please refer to Figure 4 , Figure 4 which is a flowchart of a main pump fire alarm detection method provided by an embodiment of the present invention. Applied to the main pump fire alarm detection device as described above, when the main pump fire alarm detection device uses an air sampling detection device, the main pump fire alarm detection method includes:

[0072] S401. Start the air extraction pump 3 to suck an air sample from the area where the main pump is located through the sampling air duct 1 and transport it to the smoke analysis component 2;

[0073] S402. Detect whether there are smoke particles in the air sample through the smoke analysis component 2. If so, trigger a fire alarm signal; if not, continue the detection.

[0074] In this embodiment, when using an air sampling detection device, the air sample in the area where the main pump is located is transmitted through the sampling air duct 1 to the smoke analysis component 2 in the area where the main pump is not located for analysis, which can avoid false alarms caused by the influence of high-dose radiation on the electrical components of the air sampling detection device and improve the reliability of the main pump fire detection. In addition, when the air sampling detection device needs to be maintained, the maintenance personnel only need to reach the low-radiation area for maintenance, which can reduce the dose radiation of the maintenance personnel.

[0075] Please refer to Figure 5 , Figure 5 which is another flow schematic block diagram in the main pump fire detection method provided by the embodiment of the present invention and is applied to the main pump fire detection device as described above. When the main pump fire detection device uses an infrared flame detection device, the main pump fire detection method includes:

[0076] S501. Detect the specific infrared light wavelength at multiple positions in the area where the main pump is located through multiple on-line flame detectors;

[0077] S502. When the specific infrared light wavelength is detected at any position, trigger a fire alarm signal through the fire alarm controller;

[0078] S503. Switch the control of the junction box so that its connection is changed from being connected to the on-line flame detector to being connected to the standby flame detector.

[0079] In this embodiment, when using an infrared flame detection device with a standby branch, the flame detector is set in the area where the main pump is located, which can directly monitor the flame situation of the main pump and its surrounding environment, improving the accuracy and timeliness of fire detection; at the same time, the junction box and the fire alarm controller are set in the area where the main pump is not located, avoiding the influence of adverse factors such as high temperature and radiation generated by the operation of the main pump on the junction box and the fire alarm controller, thus ensuring the stability and reliability of the device. In addition, the setting of the standby branch further improves the redundancy and safety of the detection device. Even if a certain branch fails, the maintenance personnel only need to reach the low-radiation area for maintenance and standby branch switching, which can reduce the dose radiation of the maintenance personnel.

[0080] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A main pump fire detection device is deployed in the reactor building, and the reactor building includes an area where the main pump is located and an area where the main pump is not located; characterized in that, The main pump fire detection device includes at least one of an air sampling detection device and an infrared flame detection device with a standby branch; Among them, the air sampling detection device is arranged in the area where the non-main pump is located, and the air sampling detection device includes a sampling air duct connected to the area where the main pump is located; Among them, the infrared flame detection device with a standby branch includes a flame detector, a junction box, and a fire alarm controller connected in sequence; the flame detector is arranged in the area where the main pump is located, and the junction box and the fire alarm controller are arranged in the area where the non-main pump is located.

2. The main pump fire detection device according to claim 1, wherein The air sampling detection device further includes: A smoke analysis component, connected to the sampling air duct, and used for detecting smoke in the air sample collected from the area where the main pump is located by the sampling air duct; An air extraction pump, connected to the smoke analysis component, and used for pumping the air sample in the area where the main pump is located to the smoke analysis component through the sampling air duct.

3. The main pump fire detection device according to claim 2, characterized in that, The smoke analysis component includes: A smoke detector, connected to the sampling air duct; A flowmeter, arranged at the connection between the sampling air duct and the smoke detector.

4. The main pump fire detection device according to claim 2, characterized in that, The number of the smoke analysis components is the same as the number of floors between the layers in the area where the main pump is located; one of the smoke analysis components is connected to one of the layers in the area where the main pump is located through one sampling air duct.

5. The main pump fire detection device according to claim 4, characterized in that, The number of smoke detectors in each of the smoke analysis components is multiple.

6. The main pump fire detection device according to claim 4, characterized in that, There are multiple air extraction pumps, and each air extraction pump is connected to all the smoke analysis components through pipelines.

7. The main pump fire detection device according to claim 1, characterized in that, There are multiple flame detectors and they are distributed at multiple positions in the area where the main pump is located; among them, some of the multiple flame detectors are on-line flame detectors, and the rest are standby flame detectors; The junction box is switched to be connected to the on-line flame detector and the standby flame detector alternately.

8. The main pump fire detection device according to claim 7, characterized in that, A smoke sensor probe is additionally provided in the flame detector, and the smoke sensor probe is connected to the fire alarm controller, and the smoke sensor probe is used for triggering the fire alarm controller to send out a fire alarm signal when detecting smoke.

9. A main pump fire detection method, applied to the main pump fire detection device according to any one of claims 2-6 above, characterized in that, When the main pump fire detection device adopts an air sampling detection device, the main pump fire detection method includes: Starting the air extraction pump, so that the sampling air duct sucks an air sample from the area where the main pump is located and transports it to the smoke analysis component; Detecting whether the air sample contains smoke particles through the smoke analysis component, if so, triggering a fire alarm signal, if not, continuing to detect.

10. A main pump fire detection method, applied to the main pump fire detection device according to any one of the above claims 7-8, characterized in that, When the main pump fire detection device adopts an infrared flame detection device, the main pump fire detection method includes: Detecting a specific infrared light wavelength at multiple positions in the area where the main pump is located through multiple on-line flame detectors; When detecting a specific infrared light wavelength at any position, triggering a fire alarm signal through the fire alarm controller; Switching the control of the junction box so that its connection is changed from being connected to the on-line flame detector to being connected to the standby flame detector.

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