CN214539513U - Power cable fire prevention gas monitoring system - Google Patents
Power cable fire prevention gas monitoring system Download PDFInfo
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- CN214539513U CN214539513U CN202120755290.6U CN202120755290U CN214539513U CN 214539513 U CN214539513 U CN 214539513U CN 202120755290 U CN202120755290 U CN 202120755290U CN 214539513 U CN214539513 U CN 214539513U
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Abstract
The utility model relates to a power cable fire prevention gas monitoring system, including data acquisition terminal, data concentration terminal and backstage service terminal, the data acquisition terminal sets up to a plurality ofly and gathers and transmit multichannel monitoring data to the data concentration terminal through Lora wireless transmission module, the data concentration terminal will assemble data transmission to backstage service terminal through 4G wireless transmission module, carries out the continuity monitoring and discerns the fault location to the cable heating condition; the data acquisition terminal comprises a sensor acquisition unit, the sensor acquisition unit comprises a gas sensor array, and the gas sensor array is composed of a plurality of gas sensors containing different gas sensitive materials. The utility model discloses can realize the real-time on-line monitoring to VOC class, aromatic hydrocarbons, chlorine alkene class, chlorine alkane class gas, realize the continuation monitoring to the cable condition of generating heat, based on the distributing type deployment of sensor simultaneously, can quick effectual discernment fault location.
Description
Technical Field
The utility model belongs to the technical field of the fire monitoring, concretely relates to gaseous monitoring system of power cable conflagration prevention.
Background
Power cables are an important part of electrical engineering and are used for transmitting and distributing electrical energy. The power cable is composed of an insulating core wire, an insulating sheath, a protective layer and the like, and is designed to have good insulating property, waterproof property and mechanical property in order to adapt to various complex laying environments. However, when the cable is overheated due to overcurrent in the cable loop, various performances of the cable are changed, and then a fire disaster occurs, and the cable fire disaster of the substation has a great influence, and the cable fire disaster may possibly cause impact on operating equipment in the substation. And the cable fire accident damages the cable and equipment, causes direct power failure, has long repair time, delays production, and has serious influence on the production schedule, efficiency and economic benefit of enterprise production.
In recent years, power cables are monitored, most of which give alarms in the middle of things and do not have early preventive capability. At present, most of domestic power piping corridors take fire control measures to be dry powder fire extinguishers, and in view of the fact that cables belong to inflammable substances, if the fire disaster initial stage is not found in time, the fire disaster is extremely easy to cause to spread rapidly, so that the personnel are difficult to rescue, and the handheld fire extinguishers are difficult to play a role. Therefore, under the background, the power pipe gallery should be matched with intelligent early warning equipment, monitor the operating state of the cable in real time, and early warn states such as overhigh cable temperature or cable fire in advance.
The gas monitoring sensor in present cable piping lane, tunnel is mostly single gas monitoring, the whole condition of synthesis in the unable effectual judgement tunnel can not carry out systematic analysis. Meanwhile, the fault point cannot be accurately positioned by the conventional optical fiber temperature measurement sensing.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a power cable fire prevention gas monitoring system just for solving above-mentioned problem.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
a power cable fire prevention gas monitoring system comprises a plurality of data acquisition terminals, a data concentration terminal and a background service terminal, wherein the data acquisition terminals are arranged and converge and transmit multiple paths of monitoring data to the data concentration terminal through a Lora wireless transmission module, the data concentration terminal transmits the converged data to the background service terminal through a 4G wireless transmission module, the heating condition of a cable is continuously monitored, and the fault position is identified;
the data acquisition terminal comprises a sensor acquisition unit, the sensor acquisition unit comprises a gas sensor array, and the gas sensor array is composed of a plurality of gas sensors containing different gas sensitive materials.
As the utility model discloses a further optimization scheme, data acquisition terminal and data centralized terminal all include power management unit, main control unit and Lora wireless transmission module, through Lora wireless transmission module wireless connection between data acquisition terminal and the data centralized terminal.
As a further optimization scheme of the utility model, the gas sensor array comprises eight gas sensors, and the gas of eight gas sensor monitoring is gaseous for VOC class, aromatic hydrocarbon gas, chlorine-containing olefin gas, chlorine-containing alkane gas and smog respectively.
As a further optimization scheme of the utility model, the sensor acquisition unit still includes temperature sensor and humidity transducer.
As the utility model discloses a further optimization scheme, the data acquisition terminal is gas detector, and this gas detector is including the main casing body that is provided with the locating hole, install in the probe casing of main casing body bottom and install in the digital display module of main casing internal chamber front side, temperature sensor, humidity transducer and eight gas sensor all install on the collection PCB board in the probe casing and the surface covering has waterproof ventilated membrane, and the power management unit, the main control unit and the Lora wireless transmission module at data acquisition terminal are installed in the main casing.
As the utility model discloses a further optimization scheme, the digital display module is provided with three charactron and four LED pilot lamps including showing the PCB board on showing the PCB board, is used for instructing current operating condition.
As the utility model discloses a further optimization scheme, data set terminal is relay controller, relay controller is including the installation casing that is provided with the locating hole, power management unit, main control unit and Lora wireless transmission module and the 4G wireless transmission module at data set terminal are installed in the installation casing.
As the utility model discloses a further optimization scheme, the main control unit at data set terminal is connected with LED display module, and a plurality of LED lamps are connected to LED display module, and the LED lamp sets up on the installation casing.
The beneficial effects of the utility model reside in that:
1) the utility model discloses the gas sensor array comprises the gas sensor who contains different gas-sensitive materials, can realize the real-time on-line monitoring to VOC class, aromatic hydrocarbon, chlorine alkene, chlorine alkane class gas, the monitoring data that the gas sensor collected assembles to relay controller through the Lora ad hoc network, relay controller passes back monitoring data to the backstage through 4G communication network, realize the continuation monitoring to the cable condition of generating heat, simultaneously based on the distributed deployment of sensor, can be fast effectual discernment fault location;
2) the utility model discloses gas detector can effectively discern the cable and generate heat to the unusual gas that gives out in the combustion process to the concentration of monitoring, and monitoring data passes through wireless feedback to thing networking backstage, realizes taking early warning in the conflagration emergence, carries out conflagration preliminary discharge measure;
3) the utility model discloses can use in cable pipe gallery, cable pit of transformer substation, transmission line cable tunnel, intelligent city cable pipe gallery, scene such as municipal gas transportation pipeline.
Drawings
Fig. 1 is a system topology diagram of the present invention.
Fig. 2 is the structure block diagram of the data acquisition terminal of the present invention.
Fig. 3 is a block diagram of the data centralized terminal structure of the present invention.
Fig. 4 is a front view of the gas detector of the present invention.
Fig. 5 is a front view of the relay controller of the present invention.
In the figure: 1. a data acquisition terminal; 101. an array of gas sensors; 102. a temperature sensor; 103. a humidity sensor; 2. a data centralizing terminal; 3. a background service terminal; 4. a Lora wireless transmission module; 5. a 4G wireless transmission module; 6. a digital display module; 7. a probe housing; 8. installing a shell; 9. an LED display module; 10. a main housing.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention; in the description of the present invention, "a plurality" or "a plurality" means two or more unless otherwise specified.
Example 1
As shown in fig. 1-5, a power cable fire prevention gas monitoring system includes a data acquisition terminal 1, a data centralized terminal 2 and a background service terminal 3, where the data acquisition terminal 1 is provided in plurality and gathers and transmits multiple paths of monitoring data to the data centralized terminal 2 through a Lora wireless transmission module 4, the data centralized terminal 2 transmits the gathered data to the background service terminal 3 through a 4G wireless transmission module 5, and continuously monitors the heating condition of a cable and identifies a fault position;
the data acquisition terminal 1 comprises a sensor acquisition unit, the sensor acquisition unit comprises a gas sensor array 101, and the gas sensor array 101 is composed of a plurality of gas sensors containing different gas sensitive materials.
The data acquisition terminal 1 and the data centralized terminal 2 both comprise a power management unit, a master control unit and a Lora wireless transmission module 4.
The main control unit selects STM32F103R8T6 of STM32F1 series of Italian semiconductor ST company with extremely high share in the current market and STM32F1 is based on Cortex-M3 kernel of ARM company, belongs to STM32F1 enhanced MCU, and 12-bit ADC acquisition of LQFP-64 packaged MCU can reach 16 acquisition channels at most, and a plurality of selectable sensors are provided for our acquisition; STM32F1 has the dominant frequency up to 72Mhz, can guarantee real-time performance and high efficiency for acquisition and uploading of product data, is mainly responsible for acquiring data of a gas sensor, performing algorithm operation, then performing wireless transmission through a Lora wireless transmission module 4, and sending the data to a data centralized terminal 2; including the control of nixie tubes and LED display peripherals. The minimal system of STM32F103R8T6 includes a master chip.
The power management unit collects a 12V external power supply, and simultaneously backs up the lithium battery to supply power to other modules and units in the data collection terminal 1 and the data concentration terminal 2, so that the operation of the terminals is kept. In order to improve the efficiency of the power supply, a high-efficiency DCDC power supply chip is adopted to supply power to the main control unit, the gas sensor, the Lora wireless transmission module 4, the 4G wireless transmission module 5 and the like, and meanwhile, the efficiency of the terminal when data is not collected and light load is concerned when the type is selected, so that the energy is utilized to the maximum extent.
In order to facilitate the universality of the equipment and the acquisition terminal, the power management unit, the main control unit and the Lora wireless transmission module 4 adopted by the data acquisition terminal 1 and the data centralized terminal 2 are the same.
The data acquisition terminal 1 and the data centralized terminal 2 are in wireless connection through the Lora wireless transmission module 4, and Lora can complete quick networking and realize the gathering transmission of a plurality of data centralized terminal 2 detection data. For the Lora wireless transmission module 4, E22-400T30S of hundred million company is adopted, the maximum transmitting power of the module is up to 30dBm, an official manual of an open and shelterless place shows that the communication distance can reach 10km, the receiving sensitivity is high, the working temperature can be-40-85 ℃, the Lora wireless transmission module 4 can be suitable for application scenes, a 5V power supply is adopted for supplying power, and the Lora wireless transmission module is communicated with a main chip of a main control unit through a serial port uart.
The 4G full-network transmission module adopts a 4G transmission module of everyone in Shandong, supports full-network communication, has 2-channel Socket transparent transmission, has high speed and low time delay, and can be quickly linked with a background server.
The gas sensor array 101 is composed of eight gas sensors, and the gases monitored by the eight gas sensors are respectively VOC gas, aromatic hydrocarbon gas, chloroolefin gas, chloroalkane gas and smoke. The VOC gas is ethanol and hydrogen sulfide, the aromatic hydrocarbon gas is dimethylbenzene and styrene, the chlorine-containing olefin gas is dichloroethylene, and the chlorine-containing alkane gas is trichloromethane.
The sensor acquisition unit further comprises a temperature sensor 102 and a humidity sensor 103.
The digital display module 6 comprises a display PCB board, and three nixie tubes and four LED indicating lamps are arranged on the display PCB board and used for indicating the current working state. The four LED indicator lamps comprise operation lamps (operation state indication of display equipment), warning lamps (warning and early warning state of the indicator equipment), pairing lamps (pairing state indication of a detector and a relay controller) and fault lamps (equipment operation fault indication), eight gas sensors integrated in the gas detector are all provided with warning threshold values, when the data of two sensors are monitored to reach the threshold values, warning is reported, and when the data of more than four sensors are detected to reach the threshold values, warning is reported. And under the early warning and alarming states, the detector continuously sends monitoring data information to the relay controller.
The system alarm state is comprehensively displayed through a nixie tube and an alarm lamp on the equipment:
1. when the detection of the external gas environment is normal, the nixie tube displays the number of the current detector equipment, and the warning lamp is normally turned off;
2. when the detector monitors that the early warning level is reached, the nixie tube displays Err, the warning lamp flickers, and the interval of the flickers is 1 s/time;
3. when the detector monitors that the alarm level is reached, the nixie tube displays Err, and the alarm lamp is normally on.
Data set terminal 2 is relay controller, relay controller is including the installation casing 8 that is provided with the locating hole, data set terminal 2's power management unit, main control unit and Lora wireless transmission module 4 and 4G wireless transmission module 5 are installed in installation casing 8.
The main control unit of the data centralized terminal 2 is connected with an LED display module 9, the LED display module 9 is connected with a plurality of LED lamps, the LED lamps are arranged on the installation shell 8, the main control unit controls the LED display module 9 according to detection data, namely, the LED lamps are controlled to operate, and the LED lamps comprise operation lamps (equipment power supply state indication), data lamps (detector data indication is received), fault lamps (equipment operation state indication) and signal lamps (equipment receiving 4G signal indication).
The gas detector equipment integrates 8 gas sensors +1 temperature sensors 102+1 humidity sensors 103, real-time online monitoring of VOC, aromatic hydrocarbon, chloroolefin and chloroalkane gases is achieved, the external environment gas condition is detected, gas data comprehensively detected by the detector are transmitted to the relay controller through LoRa wireless transmission, and the transmission time interval can be configured.
The gas sensor array 101, the temperature sensor 102 and the humidity sensor 103 are connected with a main control unit, and the main control unit controls the gas sensor array 101, controls the sampling time and period, and performs data processing on data sampled by the sensors. The sorted sensor data is transmitted to the relay controller by the Lora wireless transmission module 4;
relay controller has integrateed Lora wireless transmission module 4 and 4G wireless transmission module 5, and Lora wireless transmission module 4 is mainly responsible for receiving the data of each gas detector monitoring, and 4G wireless transmission module 5 forwards the data collection that gathers to backstage service terminal 3, realizes the continuation monitoring to the cable condition of generating heat, and the while is based on the distributed deployment of sensor, can be fast effectual discernment fault location.
When the system is arranged, the data acquisition terminals 1 can be respectively deployed in a power cable pipe gallery, the relay controller is connected with the gas detector in a LoRa wireless networking mode, and the relay controller is connected with the Internet of things platform of the background service terminal 3 in a 4G wireless transmission mode;
equipment installation: the gas detector adopts a vertical wall hanging mode, the gas collecting probe faces downwards vertically, and the gas collecting probe is screwed into the expansion screw for fixing through the mounting positioning hole. The installation height is determined according to the field environment.
The relay controller supports horizontal installation and vertical installation modes, and is screwed into the expansion screw for fixing through the installation positioning hole. The specific installation mode is selected according to the field situation.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (8)
1. The utility model provides a gaseous monitoring system of power cable fire prevention which characterized in that: the monitoring system comprises a plurality of data acquisition terminals (1), a data centralized terminal (2) and a background service terminal (3), wherein the data acquisition terminals (1) are arranged in a plurality of ways, multiple paths of monitoring data are converged and transmitted to the data centralized terminal (2) through a Lora wireless transmission module (4), the data centralized terminal (2) transmits the converged data to the background service terminal (3) through a 4G wireless transmission module (5), the heating condition of a cable is continuously monitored, and the fault position is identified;
the data acquisition terminal (1) comprises a sensor acquisition unit, the sensor acquisition unit comprises a gas sensor array (101), and the gas sensor array (101) is composed of a plurality of gas sensors containing different gas sensitive materials.
2. A power cable fire prevention gas monitoring system according to claim 1, wherein: data acquisition terminal (1) and data centralized terminal (2) all include power management unit, main control unit and Lora wireless transmission module (4), through Lora wireless transmission module (4) wireless connection between data acquisition terminal (1) and data centralized terminal (2).
3. A power cable fire prevention gas monitoring system according to claim 2, wherein: the gas sensor array (101) is composed of eight gas sensors, and gases monitored by the eight gas sensors are respectively VOC gas, aromatic hydrocarbon gas, chlorine-containing olefin gas, chlorine-containing alkane gas and smoke.
4. A power cable fire prevention gas monitoring system according to claim 3, wherein: the sensor acquisition unit further comprises a temperature sensor (102) and a humidity sensor (103).
5. A power cable fire prevention gas monitoring system according to claim 4, wherein: data acquisition terminal (1) is gas detector, and this gas detector is including the main casing body (10) that is provided with the locating hole, install in probe casing (7) of main casing body (10) bottom and install in digital display module (6) of main casing body (10) inner chamber front side, temperature sensor (102), humidity transducer (103) and eight gas sensor all install on the collection PCB board in probe casing (7) and the surface covering has waterproof ventilated membrane, and the power management unit, main control unit and the Lora wireless transmission module (4) of data acquisition terminal (1) are installed in main casing body (10).
6. A power cable fire prevention gas monitoring system according to claim 5, wherein: the digital display module (6) comprises a display PCB board, and three nixie tubes and four LED indicating lamps are arranged on the display PCB board.
7. A power cable fire prevention gas monitoring system according to claim 2, wherein: data set terminal (2) are relay controller, relay controller is including installation casing (8) that are provided with the locating hole, power management unit, the main control unit and the Lora wireless transmission module (4) and 4G wireless transmission module (5) of data set terminal (2) are installed in installation casing (8).
8. A power cable fire prevention gas monitoring system according to claim 7, wherein: the main control unit of the data concentration terminal (2) is connected with an LED display module (9), the LED display module (9) is connected with a plurality of LED lamps, and the LED lamps are arranged on the installation shell (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120755290.6U CN214539513U (en) | 2021-04-12 | 2021-04-12 | Power cable fire prevention gas monitoring system |
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| CN202120755290.6U CN214539513U (en) | 2021-04-12 | 2021-04-12 | Power cable fire prevention gas monitoring system |
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| CN214539513U true CN214539513U (en) | 2021-10-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114613093A (en) * | 2022-03-16 | 2022-06-10 | 国网山东省电力公司泰安供电公司 | Gas sensor array device based on crosslinked polyethylene combustion products and detection method |
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2021
- 2021-04-12 CN CN202120755290.6U patent/CN214539513U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114613093A (en) * | 2022-03-16 | 2022-06-10 | 国网山东省电力公司泰安供电公司 | Gas sensor array device based on crosslinked polyethylene combustion products and detection method |
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