Fire detection system and cable system

Abstract

The invention relates to the technical field of fire detection, and discloses a fire detection system and a cable system. The detection system comprises a temperature detection device which is laid along the overall length of a cable in a plurality of target areas in a cable vestibule and is used for detecting the temperature of the cable in each area and sending the temperature when the temperature in any area exceeds a threshold value; the flame detection device comprises a plurality of flame detectors which are respectively arranged in the plurality of target areas and is used for detecting whether radiation wavelength of flame exists around the corresponding areas and sending the radiation wavelength when the radiation wavelength is detected; and the control device is used for giving a fire alarm for any area under the condition of receiving data sent by the flame detector and the temperature detection device in any area. According to the invention, the distributed temperature sensor and the flame detection device are adopted to comprehensively monitor the fire condition in the cable vestibule, so that the probability of false alarm is effectively reduced through a dual-confirmation mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of fire detection, and in particular to a fire detection system and a cable system. Background Art

[0002] With the continuous development of industrial production, the safety of cable corridors, as an important channel for industrial power transmission, has received increasing attention. Especially in the overhead cable corridors in industrial plants, due to the dense distribution of cables, once a fire occurs, the fire can spread rapidly, causing serious losses to industrial production. At present, most of the cable corridors in industrial plants in the industry are not equipped with fire detection and fire extinguishing protection equipment due to their long distances and openness. Some projects that have installed fire detection and fire extinguishing protection equipment also have problems such as high false alarm rate, slow response speed, and low fire extinguishing efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a fire detection system and a cable system, which, based on the open environmental characteristics of the cable corridor, adopts distributed temperature sensors and flame detection devices to comprehensively monitor the fire situation in the cable corridor, thereby effectively reducing the probability of false alarms through a double confirmation mechanism.

[0004] In order to achieve the above-mentioned objectives, the first aspect of the present invention provides a fire detection system, which includes: a temperature detection device, which is laid along the entire length of the cable in multiple target areas in the cable corridor, and is used to detect the temperature of the cable in each target area, and send the temperature when the temperature in any target area exceeds a threshold; a flame detection device, which includes a plurality of flame detectors respectively arranged in the multiple target areas, wherein the flame detector is used to detect whether there is a radiation wavelength of a flame around the corresponding target area, and send the radiation wavelength when the radiation wavelength is detected; and a control device, which is used to issue a fire alarm for any target area when receiving data sent by the flame detector and the temperature detection device in any target area.

[0005] Preferably, the fire detection system also includes: an infrared thermal imaging device, the infrared thermal imaging device includes a plurality of infrared thermal imagers respectively arranged in the plurality of target areas, wherein the infrared thermal imagers are used to obtain images in the corresponding target areas, and the control device is also used to, when it is determined that a fire has occurred in any of the target areas, analyze the images in any of the target areas to reconfirm whether a fire has occurred: when it is reconfirmed that no fire has occurred in any of the target areas, confirm a false alarm; or when it is reconfirmed that a fire has occurred in any of the target areas, issue a fire alarm for any of the target areas.

[0006] Preferably, the temperature detection device is an optical fiber temperature sensor or a cable temperature sensor; and / or the flame detector is an infrared flame detector or an ultraviolet flame detector.

[0007] Preferably, the flame detector is arranged on the top of the cable corridor.

[0008] Preferably, the fire detection system further comprises: a fire protection device, the fire protection device comprising a plurality of fire protection units respectively arranged in the plurality of target areas, wherein the fire protection units comprise fire walls and / or fire blocking.

[0009] Preferably, the control device is also used to deploy fire-fighting equipment in the factory area where the cable corridor is located to extinguish the fire according to the target area where the fire is located.

[0010] Preferably, the fire fighting device comprises: a fire fighting vehicle, a water sprinkler system and / or a gas fire fighting system.

[0011] Preferably, the control device is also used to perform the following operations: upon receiving data sent by one of the flame detector and the temperature detection device in any target area, triggering the other to re-detect; and upon receiving data sent by the other in any target area, issuing a fire alarm for any target area.

[0012] Preferably, the control device is also used for not issuing a fire alarm when receiving data sent only from a flame detector or a temperature detection device in any target area.

[0013] Through the above technical scheme, the present invention creatively lays a temperature detection device along the entire length of the cable in multiple target areas in the cable corridor, which is used to detect the temperature of the cable in each target area, and sends the temperature when the temperature in any target area exceeds a threshold; a flame detection device is set, which includes multiple flame detectors respectively arranged in the multiple target areas, which are used to detect whether there is a radiation wavelength of flame around the corresponding target area, and send the radiation wavelength when the radiation wavelength is detected; when the control device receives data sent by the flame detector and the temperature detection device in any target area, a fire alarm is issued for any target area. Therefore, based on the open environmental characteristics of the cable corridor, the present invention adopts distributed temperature sensors and flame detection devices to comprehensively monitor the fire situation in the cable corridor, thereby effectively reducing the probability of false alarms through a double confirmation mechanism.

[0014] A second aspect of the present invention provides a cable system, the cable system comprising: a cable located in a cable corridor; and the fire detection system.

[0015] The specific details and benefits of the cable system provided by the embodiment of the present invention can be found in the above description of the fire detection system, which will not be repeated here.

[0016] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0018] Figure 1 is a structural schematic diagram of a fire detection system provided by an embodiment of the present invention;

[0019] Figure 2 is a structural schematic diagram of a fire detection system provided by an embodiment of the present invention;

[0020] Figure 3 It is a structural diagram of a firewall provided by an embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of the structure of a fire wall and a fireproof plug provided by an embodiment of the present invention; and

[0022] Figure 5 It is a schematic diagram of a fire detection process provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0024] After research, the inventor found that if corresponding detection means (such as temperature sensors or smoke detectors) are used, the fire situation cannot be accurately judged, resulting in a high false alarm rate; at the same time, since most cable corridors are open and the environment is complex, direct sunlight may cause local cable temperature to rise and cause false alarms; in windy weather, when the cable catches fire in the early stage, the smoke is blown away by the wind and cannot gather, causing the smoke detector to be unable to detect accurately.

[0025] In view of the above-mentioned defects, the present invention aims to provide a fire detection system for an above-ground cable corridor, which reduces the probability of false alarms and improves the fire safety performance of the cable corridor by comprehensively applying at least two fire detection means (for example, a distributed temperature detection device and a flame detection device) and a double confirmation mechanism; at the same time, fire walls and fireproof plugs are arranged at intervals in the cable corridor to block the spread of fire, and by setting up emergency plans, fire-fighting vehicles within the factory area are promptly deployed for fire-fighting, thereby improving the fire-fighting efficiency.

[0026] Figure 1 FIG. 1 is a schematic diagram of the structure of a fire detection system provided by an embodiment of the present invention. Figure 1 As shown, the fire detection system includes: a temperature detection device 10, which is laid along the entire length of the cable in multiple target areas in the cable corridor, and is used to detect the temperature of the cable in each target area, and send the temperature when the temperature in any target area exceeds a threshold; a flame detection device 20, which includes a plurality of flame detectors respectively arranged in the multiple target areas, wherein the flame detector is used to detect whether there is a radiation wavelength of a flame around the corresponding target area, and send the radiation wavelength when the radiation wavelength is detected; and a control device 30, which is used to issue a fire alarm for any target area when receiving data sent by the flame detector and the temperature detection device 10 in any target area.

[0027] The control device 30 may be arranged at a remote side.

[0028] For example, a temperature detection device (such as a distributed optical fiber temperature sensor) is laid along the entire length of the cable to monitor the temperature changes of the cable in real time. Once an abnormal increase in the cable temperature is detected, that is, exceeding a preset threshold, the relevant data is transmitted to the control device 30 (such as a central control system).

[0029] The radiation of flame has gas radiation with discrete spectrum and solid radiation with continuous spectrum, and its wavelength range is wide, which can be detected by light with specific wavelength. A flame detector is set at each key position or at a certain distance in the cable corridor, and the infrared / ultraviolet radiation wavelength of the fire within a specific range is detected. When the infrared / ultraviolet radiation wavelength of the fire is detected, the relevant data is transmitted to the control device 30 (such as a central control system). At the same time, a double confirmation mechanism is formed with the temperature detection device (such as a distributed optical fiber temperature sensor).

[0030] If data is received from two devices in a target area, a fire alarm is triggered for the target area. In order to improve the accuracy of fire detection and avoid false alarms, the present invention introduces a double confirmation mechanism. Only when the two detection means detect the same or similar abnormalities will the system trigger a formal fire alarm signal. The alarm signal is displayed on the control device 30 (such as a central control system) and alerts the on-duty personnel.

[0031] Therefore, this embodiment can make up for the defect of high false alarm rate caused by related detection means. For example, when the temperature of a cable exposed to the sun somewhere is higher than a threshold value, since no flame is detected, it is impossible to confirm that no fire has occurred through the double confirmation mechanism, and no alarm will be issued; or, when the wind blows away the smoke, the presence of the flame can still be detected. If the temperature detection device in the same target area also detects that the cable temperature is higher than the threshold value, the double confirmation mechanism is passed, and it is confirmed that a fire has occurred, and a fire alarm will be issued for the target area.

[0032] In one embodiment, the control device 30 is also used to perform the following operations: upon receiving data sent by one of the flame detector and the temperature detection device 10 in any target area, triggering the other to re-detect; and upon receiving data sent by the other in any target area, issuing a fire alarm for any target area.

[0033] In order to improve the accuracy of fire detection and avoid false alarms, the present invention introduces a double confirmation mechanism and takes into account the inconsistent or asynchronous data collection speeds of different types of detection equipment. When any detection means in the temperature detection device 10 (such as a distributed optical fiber temperature sensor) or the flame detection device 20 in a target area detects an abnormality, the system will automatically enter the double confirmation process. At this time, the other detection means will also re-detect the same area. Only when both detection means detect the same or similar abnormalities will the system trigger a formal fire alarm signal. The alarm signal is displayed on the control device 30 (such as a central control system) and alerts the on-duty personnel.

[0034] In one embodiment, the control device is further configured to not issue a fire alarm when data is received only from a flame detector or a temperature detection device 10 in any target area.

[0035] When data is received from only one detection means (ie, one detection means detects a fire), it indicates that the double confirmation mechanism has not been passed, and the control device 30 determines that there is no fire in the corresponding target area and does not issue a fire alarm.

[0036] In one embodiment, the temperature detection device 10 may be an optical fiber temperature sensor or a cable temperature sensor.

[0037] In one embodiment, the flame detector may be an infrared flame detector or an ultraviolet flame detector.

[0038] The radiation of flame has discrete spectrum gas radiation and continuous spectrum solid radiation, and its wavelength range is wide. In order to avoid interference from other signals, ultraviolet or infrared rays with specific wavelengths can be used for detection. The flame detector can be an infrared flame detector, more specifically, the infrared flame detector can be a three-band infrared flame detector; or, the flame detector can be an ultraviolet flame detector.

[0039] The flame detector can be arranged on the top of the cable corridor. On the one hand, the flame detector arranged on the top is not easily affected by the fire, and the whole fire detection system is safe and reliable; on the other hand, the flame detector has a larger detection range, and a smaller number of flame detectors can be used to monitor the same cable corridor, and the detection cost is reduced.

[0040] like Figure 2 As shown, the fire detection system further includes: an infrared thermal imaging device 40, wherein the infrared thermal imaging device 40 includes a plurality of infrared thermal imagers respectively arranged in the plurality of target areas, wherein the infrared thermal imagers are used to acquire images in the corresponding target areas.

[0041] Correspondingly, the control device 30 is also used to, when it is determined that a fire has occurred in any of the target areas, analyze the image in any of the target areas to reconfirm whether a fire has occurred: when it is reconfirmed that no fire has occurred in any of the target areas, confirm the false alarm; or when it is reconfirmed that a fire has occurred in any of the target areas, issue a fire alarm for any of the target areas.

[0042] Infrared thermal imaging cameras are installed at key locations or at intervals in the cable corridor, and the images in each target area are collected by the cameras. Then, when the control device 30 detects a fire in a target area through the two detection means described above, it automatically identifies the image in the target area through image recognition technology to confirm whether there is an abnormally high temperature area. If so, it is reconfirmed that a fire has occurred in the target area and a fire alarm is issued for the target area; if not, it is reconfirmed that no fire has occurred in the target area, and a false alarm is confirmed, and no alarm is issued.

[0043] After receiving the official fire detection signal, the on-duty personnel or management personnel will further confirm the fire situation by checking the images of the infrared thermal imaging camera corresponding to the alarm area. If a fire is confirmed, the system will immediately start the fire extinguishing protection program.

[0044] By comprehensively applying three fire detection methods (such as distributed temperature detection devices, flame detection devices, and infrared thermal imaging devices) and a triple confirmation mechanism, the probability of false alarms can be reduced and the fire safety performance of the cable corridor can be improved.

[0045] In one embodiment, the fire detection system may further include: a fire protection device (not shown), the fire protection device including a plurality of fire protection units respectively arranged in the plurality of target areas, wherein the fire protection units include fire walls and / or fire blocking.

[0046] Fire walls 50 (such as Figure 3 As shown) and fire blocking 60 (as Figure 4 Fire walls and fire blocking are constructed with flame retardant materials to ensure good fire resistance. These facilities can effectively control the fire within a certain range and provide conditions for fire trucks to enter and extinguish the fire.

[0047] Of course, the location and quantity of facilities such as fire walls and fire blocking can be reasonably planned according to the layout of the cable corridor and the cable laying conditions. Fire walls and fire blocking can be constructed with flame retardant materials that meet national standards and requirements to ensure good fire resistance.

[0048] In one embodiment, the control device 30 is also used to deploy fire-fighting equipment in the factory area where the cable corridor is located to extinguish the fire according to the target area where the fire is located.

[0049] Wherein, the fire fighting equipment includes: a fire fighting vehicle, a water sprinkler system and / or a gas fire fighting system.

[0050] For example, when the double confirmation mechanism (or through infrared thermal imaging devices or manual) confirms that a fire has indeed occurred, fire trucks within the factory area will be deployed in time according to the location of the fire to extinguish the fire in time to ensure that the fire is under control. The deployment of fire trucks can follow pre-planned routes and plans to ensure that they can quickly reach the fire scene and start firefighting work. At the same time, the system will also adjust the deployment plan of fire trucks in a timely manner according to the severity and spread of the fire to maximize the control of the fire and reduce the losses caused by the fire.

[0051] Of course, the fire truck deployment routes and plans can be planned in advance according to the layout and direction of the cable corridor to ensure that the fire trucks can reach the fire scene quickly when a fire occurs.

[0052] In addition to fire trucks, other fire extinguishing methods can also be used, such as automatic sprinkler systems, gas fire extinguishing systems, etc., to meet the fire extinguishing needs in different scenarios. However, when the cable corridor is open, the effect of the automatic fire extinguishing system cannot be guaranteed. At the same time, the cable corridor is long, and the automatic fire extinguishing system requires a very large cost investment to achieve full coverage.

[0053] Specifically, Figure 5 Take fire detection and protection process as an example to illustrate.

[0054] Step S501, using distributed optical fiber temperature sensors to detect whether a fire occurs in each target area, if so, executing step S503, otherwise, repeating step S501.

[0055] Step S502, using the three-band infrared flame detectors in each target area to detect whether a fire occurs in the corresponding target area, if so, execute step S503, otherwise, repeat step S501.

[0056] Step S503, whether the double confirmation mechanism is passed, if so, execute step S504; otherwise, execute steps S505-S506.

[0057] For example, a double confirmation mechanism is used to confirm whether a fire occurs in the same target area (eg, target area A) (ie, both methods detect a fire in target area A). If so, step S504 is executed; otherwise, the double confirmation mechanism is not passed.

[0058] Step S504, confirm whether a fire occurs in the target area through an infrared thermal imaging camera, if so, execute steps S507 and S510; otherwise, execute steps S508-S509.

[0059] The target area refers to the target area through the double confirmation mechanism, for example, the target area A involved in step S503.

[0060] Step S505, failed.

[0061] The double confirmation mechanism failed.

[0062] Step S506, confirm that there is no fire.

[0063] Confirm that there is no fire and end the process.

[0064] Step S507, start the fire extinguishing process.

[0065] Step S508, failed.

[0066] The triple confirmation mechanism failed.

[0067] Step S509, confirming the false alarm.

[0068] Step S510, execute the plan and deploy fire trucks.

[0069] To summarize, the present invention creatively lays a temperature detection device along the entire length of the cable in multiple target areas in the cable corridor, which is used to detect the temperature of the cable in each target area, and sends the temperature when the temperature in any target area exceeds a threshold; a flame detection device is set, which includes multiple flame detectors respectively arranged in the multiple target areas, which are used to detect whether there is a radiation wavelength of flame around the corresponding target area, and send the radiation wavelength when the radiation wavelength is detected; when the control device receives data sent by the flame detector and the temperature detection device in any target area, a fire alarm is issued for any target area. Therefore, based on the open environmental characteristics of the cable corridor, the present invention adopts distributed temperature sensors and flame detection devices to comprehensively monitor the fire situation in the cable corridor, thereby effectively reducing the probability of false alarms through a double confirmation mechanism.

[0070] An embodiment of the present invention provides a cable system, which includes: a cable located in a cable corridor; and the fire detection system.

[0071] The specific details and benefits of the cable system provided by the embodiment of the present invention can be found in the above description of the fire detection system, which will not be repeated here.

[0072] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0073] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0074] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A fire detection system, characterized in that: The fire detection system comprises: A temperature detection device is laid along the entire length of the cable in multiple target areas in the cable corridor, and is used to detect the temperature of the cable in each target area and send the temperature when the temperature in any target area exceeds a threshold; a flame detection device, the flame detection device comprising a plurality of flame detectors respectively arranged in the plurality of target areas, wherein the flame detectors are used to detect whether there is a radiation wavelength of a flame around the corresponding target area, and transmit the radiation wavelength when the radiation wavelength is detected; and The control device is used to issue a fire alarm for any target area when receiving data sent by the flame detector and the temperature detection device in any target area.

2. The fire detection system according to claim 1, characterized in that: The fire detection system further comprises: An infrared thermal imaging device, the infrared thermal imaging device comprising a plurality of infrared thermal imagers respectively arranged in the plurality of target areas, wherein the infrared thermal imagers are used to acquire images in the corresponding target areas, The control device is further configured to, when it is determined that a fire has occurred in any of the target areas, analyze the image in any of the target areas to reconfirm whether a fire has occurred: When it is reconfirmed that no fire occurs in any of the target areas, the false alarm is confirmed; or when it is reconfirmed that a fire occurs in any of the target areas, a fire alarm is issued for the any of the target areas.

3. The fire detection system according to claim 1 or 2, characterized in that: The temperature detection device is an optical fiber temperature sensor or a cable temperature sensor; and / or the flame detector is an infrared flame detector or an ultraviolet flame detector.

4. The fire detection system according to claim 1 or 2, characterized in that: The flame detector is arranged on the top of the cable corridor.

5. The fire detection system according to claim 1 or 2, characterized in that: The fire detection system further comprises: A fire protection device, comprising a plurality of fire protection units respectively arranged in the plurality of target areas, wherein the fire protection units comprise fire walls and / or fire blocking.

6. The fire detection system according to claim 1 or 2, characterized in that: The control device is also used to deploy fire-fighting equipment in the factory area where the cable corridor is located to extinguish the fire according to the target area where the fire is located.

7. The fire detection system according to claim 6, characterized in that: The fire fighting device comprises: a fire fighting vehicle, a water sprinkler system and / or a gas fire fighting system.

8. The fire detection system according to claim 1, characterized in that: The control device is also used to perform the following operations: When receiving data sent by one of the flame detector and the temperature detection device in any target area, triggering the other to re-detect; as well as When the data sent by the other one in any one of the target areas is received, a fire alarm is issued for the any one of the target areas.

9. The fire detection system according to claim 1 or 8, characterized in that: The control device is also used for not issuing a fire alarm when only receiving data sent by a flame detector or a temperature detection device in any target area.

10. A cable system, characterized in that: The cable system comprises: Cables, located in cable corridors; and A fire detection system according to any one of claims 1 to 9.

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