CN211207465U

CN211207465U - Explosion-proof early warning system of natural gas

Info

Publication number: CN211207465U
Application number: CN202020124298.8U
Authority: CN
Inventors: 贾传圣; 王凯奇; 田佳英
Original assignee: Jiangsu Normal University
Current assignee: Jiangsu Normal University
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-08-07
Anticipated expiration: 2030-01-19

Abstract

The utility model discloses an explosion-proof early warning system of natural gas, this system carry out the monitoring of the natural gas condition of revealing through detecting element, and the data of monitoring simultaneously still include the temperature and the smog dense fog of indoor environment, carry out data processing with the data transmission that detecting element acquireed to the main control unit, contrast with normal threshold value, surpass and set for the function that the threshold value interval then passes through control circuit control alarm device, fire control switch and natural gas control valve. For further improvement safety monitoring ability, the utility model discloses well main control unit still realizes the interconnection with mobile terminal through communication module, data transmission and video monitoring including detecting element show. Explosion-proof early warning system of natural gas improves home safety nature through the controlgear of natural gas and fire-fighting equipment's emergency control, still has long-range early warning function simultaneously, further promotion house intelligent control's the control of being incorporated into the power networks.

Description

Explosion-proof early warning system of natural gas

Technical Field

The utility model belongs to monitoring system, concretely relates to explosion-proof early warning system of natural gas.

Background

Natural gas belongs to a new energy source which gradually replaces the traditional non-renewable energy source, is not only applied in home, but also serves as a power source spring of an automobile, and plays an important role in life and generation.

As a combustible explosive gas, although various process devices and the like have good control power on the application of natural gas, the safety early warning cannot be prevented from loosening, the safety accidents caused by the existing natural gas application field, personnel factors or the environment occur sometimes, and the monitoring on the natural gas is insufficient. The monitoring of the prior art to the natural gas generally includes two aspects, firstly manual multiple safety investigation, secondly to natural gas storage and butt joint mouth of pipe etc. carry out pressure monitoring, but to the house or do not realize merging well with intelligent control system in the indoor environment of key test.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the not enough problem of natural gas monitoring technique to under the house indoor environment, the utility model provides an explosion-proof early warning system of natural gas.

The technical scheme is as follows: the utility model provides an explosion-proof early warning system of natural gas, includes detecting element, main control unit, control circuit, communication module, alarm device, fire-fighting equipment, natural gas control valve and mobile terminal, detecting element transmit the main control unit with the methane concentration data, temperature value and the smog concentration that acquire, the main control unit and then export two way signals, connect control circuit all the way, there is alarm device, fire control switch and natural gas control valve's operating condition through control circuit control, another way signal of main control unit passes through communication module with data information transmission to user's mobile terminal, the main control unit still be connected with video collector, video collector also shows video data at mobile terminal through communication module.

Furthermore, the detection unit is provided with a methane concentration detector, a temperature sensor and a smoke sensor which are distributed at the position of a natural gas household pipeline opening and a natural gas cooking bench.

The system is also provided with a screen display device, the screen display device is connected with the main control unit, and the main control unit controls the screen display device to display the monitoring data transmitted by the detection unit.

The control circuit and the communication module are respectively provided with a power supply module for supplying power to the control circuit and the communication module, including supplying power to a system.

The communication module is a wireless transmission module and comprises a GSM communication unit and a mobile terminal for video data interconnection.

The fire control switch and the natural gas control valve are electromagnetic valves.

Furthermore, the video collector comprises a camera and an infrared imaging device.

Has the advantages that: compared with the prior art, the system monitors the methane concentration, the temperature and the smoke concentration, not only aims at the natural gas, but also carries out safety early warning from the aspect of environmental factor change possibly existing in natural gas leakage, and improves the detection capability of the application range of the system; in another aspect, the utility model discloses still be connected with long-range mobile monitoring terminal, realize the control of being incorporated into the power networks through wireless transmission technique and current cloud family, improved intelligent house life quality.

Drawings

Fig. 1 is a schematic diagram of the system of the present invention;

fig. 2 is a schematic diagram of a control circuit structure of the main control unit according to the present invention;

fig. 3 is a schematic diagram of a circuit structure of the power module of the present invention, which uses a photovoltaic module to supply power;

fig. 4 is a schematic diagram of a voltage stabilizing circuit of a control circuit in the system of the present invention;

fig. 5 is a schematic circuit structure diagram of an NRF 24L 01 single chip microcomputer selected for wireless communication in embodiment 2;

FIG. 6 is a schematic view of a connection circuit configuration of an infrared imaging apparatus in embodiment 2;

FIG. 7 is a schematic view showing a connection circuit configuration of the temperature sensor in embodiment 2;

FIG. 8 is a schematic view showing the connection of an audible and visual alarm device in the alarm apparatus according to embodiment 2;

FIG. 9 is a schematic view of a connection circuit of the smoke sensor in embodiment 2;

fig. 10 is a graph showing changes in the methane concentration prediction failure data.

Detailed Description

In order to explain the technical solution disclosed in the present invention in detail, the following description and specific examples are further provided.

Example 1

To the explosion-proof early warning problem of natural gas among the daily life, the utility model provides an explosion-proof early warning system of natural gas. As shown in figure 1, the system mainly comprises a detection unit, a main control unit, a control circuit, a communication module, an alarm device, fire-fighting equipment, a natural gas control valve and a mobile terminal. For the leakage of natural gas, the methane concentration detector of the system monitors and is arranged at an interface of a natural gas inlet pipeline, a natural gas pressure valve in a household, an electromagnetic valve and an ignition device of gas using equipment, such as a cooking bench and other places of a kitchen. The system of the utility model can also be used for the safety monitoring of gas station. The environment monitoring sensor also comprises a temperature sensor and a smoke sensor, and natural gas is combusted in the use process, so that the temperature and smoke are generated, environmental parameters in a kitchen are changed, and the environment monitoring sensor is also one of important factors for fire fighting monitoring. In this embodiment, the temperature sensor and the smoke sensor are partially arranged according to the spatial position of actual use, are distributed in a plurality of areas in a kitchen room, and are connected to the main control unit, the main control unit acquires various data from the sensors, the main control unit compares the size of the transmitted data with the data in a preset safety value range, and then makes corresponding instructions and sends the corresponding instructions to the control circuit to control various emergency response devices.

The main control unit adopts singlechip or P L C controller, and the use of this controller is not repeated in the application of automation field, and in this embodiment, the control unit still shows the demonstration of methane concentration numerical value, the demonstration of temperature value and the numerical value display of smog concentration through the screen display device, and the screen display device is L ED or L CD display screen.

When the sensor value acquired by the main control unit is larger than a set threshold value, the control circuit controls the alarm device to respond, an audible and visual alarm is given to prompt field personnel to process, and when the temperature exceeds the standard or the smoke concentration is too high, the control circuit starts a fire control switch, such as a fire control shower nozzle, fire extinguishing gas and the like, and controls a control valve of natural gas to enable an electromagnetic valve of the natural gas to be in a closed state.

The control circuit and the communication module are both provided with a power module, and the power module is connected with a mains supply for power storage or an external solar battery pack. The control circuit includes a basic circuit common knowledge of those skilled in the art such as an amplifier circuit and a regulator circuit.

The utility model discloses in, the main control unit still is equipped with video collector and carries out video acquisition, arrange infrared ray imaging device including setting up kitchen camera control and key region to through main control unit controller video image data transmission, transmit mobile terminal through communication module, mobile terminal is electronic equipment such as cell-phone, and the user realizes video image's acquirement through GSM communication when outside, and the scene that leaks or the fire control to natural gas confirms, prevents the wrong report. The utility model discloses it can also further expand and insert current cloud home network.

Example 2

The system configuration and circuit base in this embodiment that are the same as those in embodiment 1 are not described again. Wherein, a natural gas explosion-proof equipment includes: the system comprises a main control module, a power supply module, a detection module, a wireless communication module, a user terminal and a wireless communication terminal; the power module is respectively connected with the detection module, the main control module and the wireless communication module, the detection module, the main control module and the wireless communication module are sequentially connected, and the wireless communication module is in communication with the user terminal and is connected with the terminal of the carrying computer processing chip. The power supply module supplies power to the main control module, the detection module, the wireless communication module, the user terminal communication module and the computer terminal by utilizing solar energy; the detection module is used for detecting various indexes of the natural gas and sending the measured parameters to the main control module; the main control module judges the methane concentration and the smoke concentration according to various parameters and various indexes, the main control module transmits the detection result to the user terminal through the wireless communication module to give an alarm and control the natural gas valve to be disconnected, and if the fire is on, the fire extinguishing device is started.

As shown in FIG. 2, the main control module is an AT89C51 single chip microcomputer, and has a full-duplex serial port P3.0, P3.1, which respectively corresponds to RXD (data receiving) and TXD (data transmitting) functions to realize serial data transmission between the single chip microcomputer and other devices, and realizes the RE L AY function by P2.0. the detection module detects that the data is transmitted to the corresponding port of the AT89C51 single chip microcomputer, calculates corresponding digital signals through rapid A/D conversion, and transmits all the data to the user equipment terminal through connecting the wireless communication module.

As shown in fig. 3, the power module is a photovoltaic cell of a high-performance solar battery pack, and includes an overcharge prevention circuit, a reverse charge prevention circuit, and a voltage stabilizing circuit; wherein the overcharge preventing circuit comprises a first resistor R₁A second resistor R₂Two-way voltage stabilizing diode VD₃And IGBT (T)₁)，IGBT(T₁) Respectively with the first resistor R₁The positive pole of lithium cell and prevent reverse charging circuit connection, the collecting electrode of IGBT respectively with photovoltaic module with prevent reverse charging circuit connection, the grid of IGBT respectively with two-way zener diode VD₃Another terminal of (1), a first resistor R₁And the other end of the second resistor R₂Is connected to one end of a second resistor R₂The other end of the anode is respectively connected with the negative electrodes of the photovoltaic module and the lithium battery. Bidirectional voltage stabilizing diode VD₃The input circuit is used for driving the IGBT to normally work and protecting the grid electrode of the IGBT at the same time. The reverse charge preventing circuit comprises a first diode VD₁And a second diode VD₂First diode VD₁Of the negative electrodeIs respectively connected with a second diode VD₂The negative electrode of the voltage stabilizing circuit is connected with the voltage stabilizing circuit; the second diode VD₂The positive electrodes of the photovoltaic module and the IGBT are respectively connected with the collector electrodes of the photovoltaic module and the IGBT. The voltage regulator circuit comprises a first capacitor C₁A second capacitor C₂A third capacitor C₃And a three-terminal regulator 7805, a first port of the three-terminal regulator 7805 and the first capacitor C respectively₁Another terminal of (1), a second capacitor C₂Another terminal of (1), a third capacitance C₃The other end of the three-terminal voltage stabilizer 7805 is connected with the reverse charging prevention circuit, and the second port of the three-terminal voltage stabilizer is respectively connected with the third capacitor C₃One end of the three-terminal voltage stabilizer is connected with the anode of the output end, and the third port of the three-terminal voltage stabilizer is respectively connected with the first capacitor C₁Another terminal of (1), a second capacitor C₂Another terminal of (1), a third capacitance C₃Is connected to the negative pole of the output terminal, wherein a second capacitor C is used₂And a third capacitance C₃The frequency compensation is realized, and the high-frequency interference generated by the voltage stabilizer is suppressed. The power module can prevent the overcharge problem of the current placed in the overcharge circuit and reuse VD₁、VD₂To prevent reverse charging, a 12V constant voltage is then output through the two-terminal regulator 7805. When the weather is clear, the solar panel directly outputs 12V voltage through the three-terminal voltage stabilizer; when the load is normal, the lithium battery is in a floating charge state, and sufficient electric energy is stored; when the household electricity cannot supply power, the lithium battery is used for supplying power. The device can solve the emergency of short power failure, saves certain electric energy, saves cost and is more convenient to use electricity.

The detection module utilizes various sensors to detect, transmits the detected value into an AT89C51 singlechip, converts the detected voltage value into a temperature value by utilizing an A/D conversion function in need of modulization, and stores data in real time.

As shown in fig. 4, the voltage stabilizing circuit includes a three-terminal regulator W7805, a fifth capacitor, a sixth capacitor, a seventh capacitor, a second resistor, and a second zener diode. And a third port of the three-terminal voltage-stabilizing tube is respectively connected with the other end of the fifth capacitor, the other end of the sixth capacitor, the other end of the seventh capacitor and the cathode of the output end.

As shown in fig. 5, the wireless communication module adopts a small-sized and low-power wireless radio frequency chip, the model is NRF 24L, NRF 24L 01 communicates with an AT89C51 single chip microcomputer through SPI (serial peripheral interface), specific connection pins are shown in fig. 2 and fig. 5, AT89C51 communicates with NRF 24L 01 through an SPI bus, after a P0.2 pin corresponds to SPI-SCK, a P0.3 pin corresponds to SPI-MISO, a P0.4 pin corresponds to SPI-MOSI, and a P0.5 pin is connected to NRF 24L 01 chip to receive or transmit a datagram, the microprocessor can be configured to interrupt, the NRF 24L 01 chip can operate in a global open SIM frequency band of 2.4GHz to 2.5GHz, a modulation mode adopts GFSK, a higher transmission rate, a plurality of communication channels are provided, 125 are provided, multi-point communication can be realized, meanwhile, a special data channel is adopted for communication, a frequency modulation technology and data encryption are provided, interference between signals can be reduced, and long-distance transmission can be realized, and stable and data transmission can be ensured, so that the whole electric network can operate stably.

As shown in fig. 6, 7, 8 and 9, the gas infrared sensor, the temperature sensor, the sound sensor and the smoke sensor are connected with the single chip microcomputer in a wiring mode in the figure and transmit data in real time.

Fig. 10 illustrates a data variation of the system of the present invention in detecting the concentration of methane in natural gas.

Specifically, the use steps after the system arrangement of the present invention are summarized as follows:

step 1: a master control electromagnetic valve is installed on the whole device, and is sucked into a closed circuit state under the condition of power supply, and is disconnected under the conditions of power failure, air leakage and the like to form an open circuit state.

Step 2: a plurality of sensors and fire extinguishing devices are uniformly arranged in places which are easy to catch fire.

And step 3: the detection module in each sensor transmits the detection result to the corresponding main control module; and each main control module calculates the change rate of the methane concentration according to the received data and monitors the change rate by combining preset change curves of the methane concentration in different states.

And 4, step 4: and each main control module sends the judgment result of the step 3 to the computer terminal through the corresponding wireless communication module. If the fault occurs, the electromagnetic valve is remotely disconnected through the computer terminal, the air source is cut off, and then the switch of the fire extinguishing device is opened to extinguish the fire, so that the fault source can be accurately cut off in time and hidden dangers can be solved.

Claims

1. The utility model provides an explosion-proof early warning system of natural gas which characterized in that: including detecting element, main control unit, control circuit, communication module, alarm device, fire-fighting equipment, natural gas control valve and mobile terminal, detecting element methane concentration data, temperature value and the transmission of smog concentration data to the main control unit that will acquire, the main control unit and then export two way signals, connect control circuit all the way, through the operating condition of control circuit control alarm device, fire control switch and natural gas control valve, another way signal of main control unit passes through communication module with data information transmission to user's mobile terminal, the main control unit still be connected with video collector, video collector also shows video data at mobile terminal through communication module.

2. The natural gas explosion-proof early warning system of claim 1, wherein: the detection unit is provided with a methane concentration detector, a temperature sensor and a smoke sensor which are distributed at the position of a natural gas household pipeline opening and a natural gas cooking bench.

3. The natural gas explosion-proof early warning system of claim 1, wherein: the system is also provided with a screen display device, the screen display device is connected with the main control unit, and the main control unit controls the screen display device to display the monitoring data transmitted by the detection unit.

4. The natural gas explosion-proof early warning system of claim 1, wherein: the control circuit and the communication module are respectively provided with a power supply module for supplying power, including supplying power to the system.

5. The natural gas explosion-proof early warning system of claim 1, wherein: the communication module is a wireless transmission module and comprises a GSM communication unit and a mobile terminal for video data interconnection.

6. The natural gas explosion-proof early warning system of claim 1, wherein: the fire control switch and the natural gas control valve are electromagnetic valves.

7. The natural gas explosion-proof early warning system of claim 1, wherein: the video collector comprises a camera and an infrared imaging device.