Building gas leakage monitoring device based on pressure signals

Abstract

The utility model discloses a building gas leakage monitoring device based on pressure signal, which comprises a shell, a display arranged on the shell, a connecting pipe positioned in the shell, an electromagnetic valve, a pressure sensor and a controller, the electromagnetic valve and the pressure sensor are arranged on the connecting pipe, the controller is connected with the pressure sensor, the electromagnetic valve and the display, and the display is connected with the controller. The controller is connected with a power supply, and two pipe ends of the connecting pipe form connecting ports on the shell. The gas leakage monitoring device is installed on a gas main pipeline behind the pressure regulating box, gas pressure data are collected through the pressure sensor, whether the gas pipeline leaks or not is judged through the controller, gas leakage can be effectively monitored, and gas use safety is improved; the system can provide guidance basis for building low-pressure gas pipeline maintenance operation and accident early warning, and can be widely applied to the field of safety operation of low-pressure gas pipelines.

Description

TECHNICAL FIELD

[0001] The utility model relates to a building gas leakage monitoring device based on pressure signal. BACKGROUND

[0002] Natural gas is an important clean energy and the main fuel of household gas appliances. With the continuous upgrading and optimization of China's energy structure, the position of gas energy based on natural gas in China's energy consumption is continuously improving, and the consumption of natural gas is rapidly growing. However, safety issues in the daily application of gas need to be concerned. Due to the long service life of the pipeline, the sealing ring and the welding seam are not tight during construction, corrosion, third-party damage, and other reasons, the pipeline may leak, and the leaked gas may pollute the air and even cause explosions, endangering the public safety of the city and causing casualties and property losses.

[0003] Currently, the leakage monitoring of downstream gas pipelines of urban natural gas pipe networks mainly adopts the manual inspection method, but this method is low in efficiency and often cannot timely detect the leakage. The leakage monitoring of natural gas in residential homes mainly adopts the method of installing gas alarms. However, the gas alarms can only monitor the leakage within a certain range and cannot effectively monitor the areas such as corridors and bathrooms where the gas alarms are not installed, thus cannot timely detect the leakage and may have a sensor failure, which poses a safety risk.

[0004] Therefore, it is necessary to upgrade the existing leakage monitoring technology of downstream pipelines of urban gas pipe networks. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a building gas leakage monitoring device based on pressure signal which has simple structure, low cost, can effectively monitor gas leakage, and improves the safety of gas use.

[0006] The utility model realizes the purpose by the following technical scheme: a building gas leakage monitoring device based on pressure signal, characterized by comprising a shell, a display installed on the shell, a connecting pipe located in the shell, an electromagnetic valve, a pressure sensor, and a controller, wherein the electromagnetic valve and the pressure sensor are arranged on the connecting pipe, the controller is connected with the pressure sensor, the electromagnetic valve, and the display, the controller is connected with a power supply, and the two pipe ends of the connecting pipe form a connecting port on the shell.

[0007] The utility model is installed on the main gas pipeline after the pressure regulating box, collects the gas pressure data by the pressure sensor, judges whether the gas pipeline leaks or not by the controller, can effectively monitor the gas leakage, and improves the safety of gas use. The utility model can provide guidance basis for the maintenance operation of building low-pressure gas pipelines and accident early warning, and can be widely applied in the safe operation field of low-pressure gas pipelines.

[0008] The building gas leakage monitoring device is connected with the pressure regulating box and installed on the gas main pipeline behind the pressure regulating box.

[0009] The maximum working pressure of the pressure sensor is 10kPa.

[0010] The controller has a 4G communication module, and the controller receives pressure data transmitted by the pressure sensor and performs operation through the 4G communication module and the pressure sensor, and uploads the operation result of judging the leakage level to the server through the 4G communication module and the server.

[0011] The controller is powered by 220V alternating current.

[0012] Compared with the prior art, the utility model has following outstanding technical effects:

[0013] (1) the utility model is installed on the gas main pipeline behind the pressure regulating box, and whether the gas pipeline leaks is judged by the controller through the pressure sensor collecting gas pressure data, which can effectively monitor the gas leakage and improve the safety of gas use.

[0014] (2) the utility model can provide guidance basis for building low-pressure gas pipeline maintenance operation and accident early warning, and can be widely applied to the safe operation field of low-pressure gas pipeline.

[0015] (3) the utility model has simple structure, low cost, strong practicability, and is suitable for being widely promoted and used. DRAWINGS

[0016] The utility model will be further described in combination with the drawings and specific embodiments.

[0017] Figure 1 It is the structural schematic diagram of the utility model;

[0018] Figure 2 It is the internal structure schematic diagram of the utility model.

[0019] In the drawing: 1 - shell, 2 - display, 3 - connecting pipe, 4 - electromagnetic valve, 5 - pressure sensor, 6 - controller, 7 - connecting port, 8 - power line. CONCRETE EMBODIMENT

[0020] The application will be further described by the description of concrete embodiment, but this is not the limitation of the application, and the person skilled in the art can make various modifications or improvements according to the basic idea of the application, as long as the basic idea of the application is not deviated, and it is within the protection scope of the application.

[0021] For example, Figure 1 andFigure 2 The utility model discloses a building gas leakage monitoring device based on pressure signal, including casing 1, install display 2 on casing 1, set up connecting pipe 3 in casing, electromagnetic valve 4, pressure sensor 5 and controller 6, electromagnetic valve 4 and pressure sensor 5 are located on connecting pipe 3, and controller 6 is connected with pressure sensor 5, electromagnetic valve 4, display 2, and controller 6 is connected power supply, and the both pipe ends of connecting pipe 3 form connecting port 7 in casing 1.

[0022] The utility model discloses a building gas leakage monitoring device based on pressure signal, including casing 1, install display 2 on casing 1, set up connecting pipe 3 in casing, electromagnetic valve 4, pressure sensor 5 and controller 6, electromagnetic valve 4 and pressure sensor 5 are located on connecting pipe 3, and controller 6 is connected with pressure sensor 5, electromagnetic valve 4, display 2, and controller 6 is connected power supply, and the both pipe ends of connecting pipe 3 form connecting port 7 in casing 1.

[0023] Pressure sensor 5 is used to detect pipeline pressure data, and the maximum working pressure is 10kPa. Display 2 can display the current pipeline state and can input operation parameters. The electromagnetic valve 4 is installed on the gas main pipeline after the pressure regulating tank, and its function is to cut off the gas supply of the main pipeline under certain conditions. The electromagnetic valve is a special custom model, which is connected with the pipeline by threads. The above-mentioned instruments are all explosion-proof models.

[0024] The controller 6 is powered by 220V AC power supply and connected to the power supply through the power cord 8. The controller 6 has a 4G communication module, and the controller 6 communicates with the pressure sensor 5 through the 4G communication module to receive the pressure data transmitted by the pressure sensor 5 and perform calculations. The controller 6 communicates with the server through the 4G communication module to upload the calculation results of judging the leakage level to the server.

[0025] The utility model can record the gas pressure in the pipeline in real time, and can be cut off and restored by the electromagnetic valve. The pressure and detection information are uploaded by the communication module. The utility model can effectively identify the gas consumption and leakage situation of the pipeline behind the pressure regulating tank, and can automatically monitor periodically to ensure the safety of the pipeline operation. The electromagnetic valve can cut off the gas supply for leakage detection when the pipeline is under maintenance. The utility model has the characteristics of low cost, high reliability and low false alarm rate, and can detect the leakage of the pipeline behind the outlet of the pressure regulating tank.

[0026] The controller of the utility model can determine whether there is gas consumption behavior according to the real-time building pressure regulator outlet pipeline pressure, and can determine whether there is leakage and the leakage level of the building pipeline by combining the no-gas working condition with the theoretical pressure calculation.

[0027] The judgment principle of the controller is as follows:

[0028] Determination of gas use: The basic determination logic can be formed by observing the pipeline pressure data after the building user uses gas. The determination algorithm of gas use is divided into cut-off type and non-cut-off type. The gas-using equipment can still work for a short time at a gas pressure of about 1500 Pa, so the cut-off type can determine according to the change of pipeline pressure after multiple short-time cut-offs, and the non-cut-off type is to speculate and analyze according to the recent pipeline pressure data, including average pressure, range and recent time of pressure change.

[0029] Determination of leakage: In the expected no gas use condition (2-4 am, set according to the habits of the installed users, mainly to avoid gas use at night, such as people who work late, can set 3-5 am, or take a questionnaire survey), cut off the pressure regulator for 30s to record the pressure data. From the 5th second (discard the first 5s), take an actual pipeline pressure every 5 seconds to perform theoretical calculation, and calculate the 5-second theoretical drop value under different leakage orifices (theoretical calculation process is shown below). Compare the calculation results of each aperture with the actual pressure after 5 seconds, and take the leakage aperture corresponding to the nearest theoretical pressure less than the actual pressure as the leakage detection result of this 5 seconds. There are 5 judgments in total for 30 seconds, corresponding to 5 results. Take the result of the largest leakage aperture as the final conclusion of the entire determination. If the pressure drop is less than the lower limit of the tolerable leakage aperture, it is determined to be no leakage. If the pressure drops rapidly after cutting off, the drop value is greater than the drop value of the set maximum aperture, at this time it is determined to be a gas use condition and the gas supply is restored, and the determination is re-determined after a period of time, the time interval is 20 minutes (the interval is 30 minutes in other cases). The majority decision method (3 times) of continuous multiple calculation results is used to determine whether it is leakage, that is, a total of 3x5=15 times of determination. If leakage is detected, an alarm will be given through the communication system.

[0030] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application, therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical idea disclosed by the present application should be covered by the claims of the present application.

Claims

1. A building gas leakage monitoring device based on pressure signal, characterized in that: The device comprises a shell, a display installed on the shell, a connecting pipe arranged in the shell, a solenoid valve and a pressure sensor arranged on the connecting pipe, and a controller connected with the pressure sensor, the solenoid valve and the display, wherein the controller is connected with a power supply, and two pipe ends of the connecting pipe form connecting ports on the shell.

2. The pressure signal based building gas leakage monitoring device according to claim 1, characterized in that: The building gas leakage monitoring device is connected with the main gas pipeline behind the pressure regulating box through the connecting ports and is installed on the main gas pipeline behind the pressure regulating box.

3. The pressure signal based building gas leakage monitoring device according to claim 2, characterized in that: The maximum working pressure of the pressure sensor is 10 kPa.

4. The pressure signal based building gas leakage monitoring device according to claim 3, characterized in that: The controller has a 4G communication module, communicates with the pressure sensor through the 4G communication module to receive pressure data transmitted by the pressure sensor and performs calculation, and communicates with a server through the 4G communication module to upload the calculation result of judging the leakage level to the server.

5. The pressure signal based building gas leakage monitoring device according to claim 4, characterized in that: The controller is powered by 220V alternating current.

Images