阅读说明：本技术 一种智能化燃气计量系统 (Intelligent gas metering system ) 是由 何文 杨敏 于 2019-10-11 设计创作，主要内容包括：本发明涉及智燃气计量领域,具体是一种智能化燃气计量系统,包括：压力检测单元,用于对管道内或电子计量装置内的气压进行跟踪检测,当出现超压或欠压时发出燃气阀门开关信号至计量检测、信号处理单元；流量判断单元,用于通过检测数码轮的转数和时间来计算出一定时间段内的平均流速并判断是否处于超流量或微流量状态；当处于超流量或微流量状态时,给出超限信号至计量检测、信号处理单元；还包括控制单元、数据上报单元和计量检测、信号处理单元。本发明把对超压、欠压、超流量和微流量等异常情况的信号采集与现有的电子计量装置进行集成,提高燃气使用过程中的安全防范能力,相较巡检处理模式大大降低能耗。(The invention relates to the field of intelligent gas metering, in particular to an intelligent gas metering system, which comprises: the pressure detection unit is used for tracking and detecting the air pressure in the pipeline or the electronic metering device, and sending a gas valve switching signal to the metering detection and signal processing unit when overpressure or underpressure occurs; the flow judging unit is used for calculating the average flow speed in a certain time period by detecting the revolution and the time of the digital wheel and judging whether the flow judging unit is in an over-flow or micro-flow state; when the system is in an over-flow or micro-flow state, an over-limit signal is sent to a metering detection and signal processing unit; the device also comprises a control unit, a data reporting unit and a metering detection and signal processing unit. The invention integrates the signal acquisition of abnormal conditions such as overpressure, underpressure, overflow, micro-flow and the like with the existing electronic metering device, improves the safety precaution capability in the use process of the fuel gas, and greatly reduces the energy consumption compared with the routing inspection processing mode.)

1. An intelligent gas metering system, comprising:

the pressure detection unit (10) is used for tracking and detecting the air pressure in a pipeline or an electronic metering device, and sending a gas valve switching signal to the metering detection and signal processing unit (50) when overpressure or underpressure occurs;

a flow rate judging unit (20) for calculating an average flow rate in a certain period of time by detecting the number of revolutions and time of the digital wheel and judging whether the flow rate is in a super-flow or micro-flow state; when the device is in an over-flow or micro-flow state, an over-limit signal is sent to a metering detection and signal processing unit (50);

the control unit (30) is used for controlling the on and off of the gas valve;

the data reporting unit (40) is used for reporting to the data center when abnormal conditions of overpressure, underpressure, overflow and micro-flow are detected; and

and the metering detection and signal processing unit (50) is respectively communicated with the pressure detection unit (10), the flow judgment unit (20), the control unit (30) and the data reporting unit (40) and is used for carrying out calculation processing according to externally detected data and controlling the on-off of the gas valve and data reporting.

2. The intelligent gas metering system according to claim 1, wherein the overpressure, underpressure, overflow and micro-flow anomalies detected by the data reporting unit (40) are handled in an interrupt mode.

3. The intelligent gas metering system according to claim 1 or 2, characterized in that the pressure detection unit (10) extracts the gas valve switching signal mechanically.

4. The intelligent gas metering system according to claim 3, wherein the pressure detection unit (10) comprises a housing (106), a tension membrane (104) is arranged in the housing (106), a connecting rod (102) is fixed in the middle of the upper side of the tension membrane (104), the connecting rod (102) extends out of the top of the housing (106), a micro switch device (101) is connected to the upper end of the connecting rod (102), a damping device (103) is installed on the connecting rod (102) in the housing (106), and a gas guide pipe (105) is arranged at the bottom of the housing (106).

5. The intelligent gas metering system according to claim 4, wherein a pipeline pressure is introduced to the lower part of the tension membrane (104) through the gas conduit (105) and forms a pressure balance with the damping device (103); when overpressure or underpressure occurs, the tension membrane (104) triggers the microswitch device (101) to send out a signal through the connecting rod (102).

6. The intelligent gas metering system according to claim 5, wherein the metering detection and signal processing unit (50) comprises an electronic metering device.

7. The intelligent gas metering system of claim 6, wherein the gas valve is disposed within an electronic metering device.

Technical Field

The invention relates to the field of intelligent gas metering, in particular to an intelligent gas metering system.

Background

With the continuous improvement of the technology of automatic instruments and meters, the basic automation of the gas metering devices used by users at present is realized, for example, an IC card gas metering device can detect the gas consumption and control the on and off of a gas meter through a cut-off valve in the gas meter. With the upgrading and updating of communication technology, an internet of things intelligent metering system with internet and big data as a core appears. In the process of gradual intellectualization of the metering system, the monitoring of the safety factor of the gas consumption of the user is not included in the use range. The existing gas safety protection function is mainly realized by independent external equipment such as a mechanical self-closing valve, an electromagnetic valve and the like, and the investment cost is inevitably increased.

Due to the restriction of self energy consumption of an independent power supply and metering device, no metering device which integrates the functions of trade metering and protection against phenomena such as overpressure, underpressure, overflow, micro-flow and the like is available at present. Therefore, in view of the above current situation, there is an urgent need to develop an intelligent gas metering system which relies on an intelligent gas metering device, expands the application range of electronic technology, and increases a gas use safety monitoring function, so as to overcome the shortcomings in the current practical application.

Disclosure of Invention

An object of an embodiment of the present invention is to provide an intelligent gas metering system, so as to solve the problems proposed in the background art.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

an intelligent gas metering system comprising:

the pressure detection unit is used for tracking and detecting the air pressure in the pipeline or the electronic metering device, and sending a gas valve switching signal to the metering detection and signal processing unit when overpressure or underpressure occurs;

the flow judging unit is used for calculating the average flow speed in a certain time period by detecting the revolution and the time of the digital wheel and judging whether the flow judging unit is in an over-flow or micro-flow state; when the system is in an over-flow or micro-flow state, an over-limit signal is sent to a metering detection and signal processing unit;

the control unit is used for controlling the on and off of the gas valve;

the data reporting unit is used for reporting to the data center when abnormal conditions of overpressure, underpressure, overflow and micro-flow are detected; and

and the metering detection and signal processing unit is respectively communicated with the pressure detection unit, the flow judgment unit, the control unit and the data reporting unit and is used for carrying out calculation processing according to externally detected data and controlling the on-off of the gas valve and data reporting.

As a further scheme of the invention: and the abnormal conditions of overpressure, underpressure, overflow and micro-flow detected by the data reporting unit are processed by adopting an interrupt mode.

As a further scheme of the invention: the pressure detection unit extracts a gas valve switching signal in a mechanical mode.

As a further scheme of the invention: the pressure detection unit comprises a shell, a tension film is arranged in the shell, a connecting rod is fixed in the middle of the upper side of the tension film, the connecting rod extends out of the top of the shell, a micro-switch device is connected to the upper end of the connecting rod, a damping device is installed on the connecting rod in the shell, and a gas guide pipe is arranged at the bottom of the shell.

As a further scheme of the invention: the pipeline pressure is introduced to the lower part of the tension membrane through the gas guide pipe and forms pressure balance with the damping device; when overpressure or undervoltage occurs, the tension film triggers the micro-switch device to send out signals through the connecting rod.

As a further scheme of the invention: the metering detection and signal processing unit comprises an electronic metering device.

As a further scheme of the invention: the gas valve is arranged in the electronic metering device.

Compared with the prior art, the embodiment of the invention has the beneficial effects that:

this intelligent gas metering system integrates the signal acquisition to unusual conditions such as superpressure, under-voltage, super flow and miniflow with current electronic metering device, makes the metering device who adopts electronic type measurement further intelligent, improves the safety precaution ability in the gas use, and the processing mode greatly reduced energy consumption of patrolling and examining compares.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a pressure detection unit according to an embodiment of the present invention.

In the figure: 10-a pressure detection unit, 101-a microswitch device, 102-a connecting rod, 103-a damping device, 104-a tension membrane, 105-a gas conduit, 106-a shell, 20-a flow judgment unit, 30-a control unit, 40-a data reporting unit and 50-a metering detection and signal processing unit.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.