Gas meter integrated with combustible gas detection function

Abstract

A gas meter integrated with a combustible gas detection function comprises an outer shell, and a gas metering module is arranged in the outer shell and used for monitoring gas flow in real time; the combustible gas detection module comprises a multispectral photoelectric smoke detector, a sensor management chip and an exhaust fan interface; in conclusion, a multi-stage detection strategy (photoelectric / ionization sensor primary screening + NDIR spectrum secondary verification) is combined with an LSTM neural network algorithm, the detection precision is less than or equal to 50ppm, and the response speed is improved by three times compared with that of a traditional system; a built-in emergency electromagnetic valve can cut off an air source within 3 seconds, an alarm is pushed to a user and a supervision platform through NB-IoT / LoRa dual-mode communication synchronously, and an exhaust system and a smart home are linked to form closed-loop safety protection. Modularized design (IP65 protection and dual power supply) adapts to a complex environment, supports seamless joint with a smart city system, and realizes real-time and intelligent management of gas safety.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas metering, and particularly relates to a gas meter integrated with a combustible gas detection function. Background Art

[0002] Traditional gas meters have a single function and are difficult to meet the safety requirements of modern families. Although discrete combustible gas alarms can detect leaks, their installation positions are limited, the wiring is complex and the cost is high. At the same time, the information between alarms is isolated, making it difficult to form an effective linkage protection. Some integrated solutions on the market attempt to integrate metering and monitoring, but due to technical limitations, the false alarm rate is relatively high and response delays occur frequently. These problems not only increase the economic burden of users, but may also fail at critical moments, bringing potential safety hazards to families. Therefore, it is particularly important to develop an intelligent gas monitoring system with high efficiency, low false alarms, and easy installation and maintenance. Content of the Utility Model

[0003] The utility model aims to provide a gas meter integrated with a combustible gas detection function, and solve the technical problem that the existing hoisting system for prefabricated building wall panels has certain potential safety hazards during operation.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A gas meter integrated with a combustible gas detection function includes an outer housing, and a gas metering module is arranged inside the outer housing for real-time monitoring of gas flow;

[0006] A combustible gas detection module, which includes a multi-spectral photoelectric smoke detector, a sensor management chip and an exhaust fan interface;

[0007] A main control module for processing the data of the combustible gas detection module and controlling the operation state of the gas meter;

[0008] A safety control module, which includes a high-response emergency cut-off solenoid valve and a valve drive chip;

[0009] A communication module for data interaction with the user's intelligent device or cloud server, supporting NB-IoT / LoRa dual-mode wireless transmission and Bluetooth 5.0 local communication;

[0010] A power module for providing power support for the gas meter;

[0011] A gas sampling port is arranged on the front side of the outer housing, and the position of the gas sampling port corresponds to the multi-spectral photoelectric smoke detector.

[0012] Furthermore, the combustible gas detection module integrates a temperature and humidity compensation unit, and the detection accuracy is ≤50 ppm.

[0013] Furthermore, the power module includes a 5VDC power interface, a built-in replaceable lithium battery, a DC power adapter, and a power management chip. The DC power adapter is connected to the 5VDC power interface via a wire.

[0014] Compared with existing technologies, the advantages of this invention are as follows: This invention deeply integrates gas meters with combustible gas detection functions, upgrading traditional metering equipment into intelligent safety terminals, significantly reducing user and management costs; it adopts a multi-level detection strategy (initial screening with photoelectric / ionization sensors + secondary verification with NDIR spectroscopy) combined with an LSTM neural network algorithm, achieving a detection accuracy of ≤50ppm, a false alarm rate of <0.5 times / year, and a response speed 3 times faster than traditional systems; the built-in emergency solenoid valve can cut off the gas supply within 3 seconds, simultaneously pushing alarms to users and monitoring platforms via NB-IoT / LoRa dual-mode communication, and linking with ventilation systems and smart homes to form a closed-loop safety protection system. The modular design (IP65 protection + dual power supply) adapts to complex environments, reducing overall costs by 40%, and supports seamless integration with smart city systems, enabling real-time and intelligent management of gas safety. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is an isometric view of a gas meter that integrates combustible gas detection function according to this utility model.

[0017] Figure 2 This is a cross-sectional view of a gas meter that integrates combustible gas detection function according to this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The present invention will be further described in detail below with reference to the embodiments.

[0020] like Figure 1 and Figure 2 As shown, a specific embodiment of a gas meter integrating combustible gas detection function provided by this utility model is as follows:

[0021] A gas meter with integrated combustible gas detection function includes a housing 100, and a gas metering module 1 is provided inside the housing 100 for real-time monitoring of gas flow.

[0022] Combustible gas detection module 2 includes a multispectral photoelectric smoke detector 3, a sensor management chip 4, and an exhaust fan interface 5, used to detect the concentration of liquefied petroleum gas, propane, hydrogen, and natural gas; combustible gas detection module 2 integrates a temperature and humidity compensation unit, with a detection accuracy of ≤50ppm; a gas sampling port 101 is provided on the front side of the outer casing 100, and the position of the gas sampling port 101 corresponds to that of the multispectral photoelectric smoke detector 3;

[0023] The main control module 6 is used to process the data from the combustible gas detection module 2 and control the operating status of the gas meter; it is configured to process detection data and perform dynamic calibration, and has a built-in LSTM neural network algorithm and multi-level alarm thresholds; the main control module 6 is equipped with a false alarm filtering algorithm to reduce the false alarm rate by distinguishing between cooking steam and real smoke.

[0024] Safety control module 7 includes a high-response emergency shut-off solenoid valve 8 and a valve drive chip 9. The response time of the high-response emergency shut-off solenoid valve 8 is <3s.

[0025] The communication module 10 is used to interact with the user's smart device or cloud server, and supports NB-IoT / LoRa dual-mode wireless transmission and Bluetooth 5.0 local communication.

[0026] The power module 11 provides power to the gas meter. The power module 11 includes a 5VDC power interface 12, a built-in replaceable lithium battery 13, a power management chip 102, and a DC power adapter 14, which is connected to the 5VDC power interface 12 via a wire.

[0027] The working method of a gas meter with integrated combustible gas detection function is as follows:

[0028] 1. Multi-level detection strategy

[0029] (1) Primary test

[0030] Combustible gas detection module 2 collects ambient gas data in real time through multispectral photoelectric smoke detector 3. The photoelectric sensor detects smoke particles (such as cooking steam and dust interference) in the visible light range, and the ionization sensor detects tiny particles through the ionization chamber (suitable for early smoke or combustible gas leaks). When the sensor detects that the concentration of combustible gas exceeds the first threshold (e.g., 1000 ppm), the secondary verification process is initiated.

[0031] (2) Secondary verification

[0032] After receiving the primary detection over-limit signal, the main control module 6 activates the NDIR (non-dispersive infrared) spectral sensor. The NDIR sensor emits infrared light of a specific wavelength (selected according to the absorption spectrum of the target gas, for example, methane absorbs at a wavelength of 3.3 μm), and calculates the gas concentration by detecting the light intensity attenuation.

[0033] (3) Linked detection

[0034] After secondary verification confirms the leak, the system enters a high-sensitivity monitoring mode and automatically activates the combustible gas detection module 2 to enhance monitoring.

[0035] 2. Emergency Response Procedures

[0036] (1) Local response: The main control module 6 sends a command to the safety control module 7 to drive the high-response emergency shut-off solenoid valve 8 to cut off the gas passage within <3 seconds;

[0037] (2) Remote notification: The communication module 10 uploads alarm data (including concentration value, location and timestamp) to the cloud monitoring platform through the NB-IoT / LoRa dual-mode network.

[0038] (3) Linkage control: The main control module 6 sends instructions to the smart home hub via Bluetooth 5.0 or cloud API (such as MQTT protocol) to start the exhaust fan and turn off kitchen appliances.

[0039] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas meter integrated with a combustible gas detection function, characterized by: The gas meter comprises an outer shell, a gas metering module arranged in the outer shell, and a combustible gas detection module arranged in the outer shell. The combustible gas detection module comprises a multi-spectrum photoelectric smoke detector, a sensor management chip and an exhaust fan interface. The main control module is used for processing data of the combustible gas detection module and controlling an operation state of the gas meter. The safety control module comprises a high-response emergency cut-off electromagnetic valve and a valve driving chip. The communication module is used for data interaction with a smart device or a cloud server of a user, supports NB-IoT / LoRa dual-mode wireless transmission and Bluetooth 5.0 local communication. The power module is used for providing power support for the gas meter. A gas sampling port is arranged on a front side of the outer shell, and the gas sampling port corresponds to the multi-spectrum photoelectric smoke detector.

2. The gas meter integrated with combustible gas detection function according to claim 1, characterized in that: The combustible gas detection module integrates a temperature and humidity compensation unit, and the detection precision is less than or equal to 50 ppm.

3. The gas meter integrated with combustible gas detection function according to claim 1, characterized in that: The power module comprises a 5VDC power interface, a built-in replaceable lithium battery, a DC power adapter and a power management chip, and the DC power adapter is connected with the 5VDC power interface through a wire.

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