CN2537963Y

CN2537963Y - Intelligent gas flow meter

Info

Publication number: CN2537963Y
Application number: CN 02232839
Authority: CN
Inventors: 田宏杰; 胡敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-05-21
Filing date: 2002-05-21
Publication date: 2003-02-26
Anticipated expiration: 2012-05-21

Abstract

The utility model discloses an intelligentized gas flowmeter, which can be divided into two parts of an intelligent head and a mechanism channel according to the structure, wherein, the intelligent head consists of a shell, a display, a key-press, a temperature sensor port, a temperature sensing wire, a temperature sensor, a bus transmission port, a pressure sensor port, a pressure sensing wire, a pressure sensor, a flowrate sensor and a flowrate sensor bin; a turbine, a vortex core and a gear assembly are installed inside the mechanism tube; when gas passing the mechanism channel, the turbin rotates, then the turbine, the vortex core and the gear drive system transmit the rotational motion to be transformed into flowrate pulse signal by magnetoelectric isolation so as to be processed by a microprocessor; at the meantime, the microprocessor collects the temperature and the pressure of the media in real time, condensation factor Z and volume flowrate of the gas under the standard state is solved through optimizational mathematical model algorithm, thereby realizing high precision measurement of gas flowrate.

Description

Intelligent gas flowmeter

The utility model belongs to the measuring apparatus of gas flow, more particularly is meant a kind of intelligent gas flowmeter.

Existing measurement of gas flow device is generally mechanical direct-reading or digital.Machinery direct-reading is not owing to considering pressure, temperature and the compressible influence of gas, so will reach about 2.5%, even not have correlation of data in the pressure of gas, the occasion measuring error that temperature can not be constant.Though and existing digital measurement of gas flow device has been considered the influence that gas temperature, pressure change, and does not consider gas compressibility, makes measuring error reach 1.5%, even higher.

Because gas has compressibility, make metering result's accumulated value become the accumulated value of a different pressures, temperature, density, can't estimate and compare more not talkative its accuracy.

Be in the needs of meterage, must adopt continual powered battery mode, improve the metering accuracy and the anti-theft of system, and the battery low capacity during to powered battery detects and compensate, so that manually carry out data estimation.

The purpose of this utility model is to overcome the deficiency of existing flowmeter in the deal with data accuracy, providing a kind of adopts little power consumption intelligent chip to carry out the metrophia compensation of gaseous tension, temperature, compressibility factor correction, make it become volumetric flow rate under the standard state, owing to adopted little power consumption technology, guaranteed battery powered permanence simultaneously; Magnetoelectricity is isolated the security of conversion; The intelligent gas flowmeter of performances such as the long-range transmission of data.

The utility model is to be fixed on the pipeline that gas passes through by the flow sensor storehouse with intelligent gas flowmeter bottom, also two sensors on the flowmeter are connected simultaneously on the pipeline that gas passes through, when gas passes through pipeline, the turbine rotation, to rotatablely move and spread out of by turbine, scroll bar, gear train assembly, convert traffic pulse to by the magnetoelectricity isolation, for microprocessor processes; The while microprocessor is the temperature and pressure of collection medium in real time, obtains the volumetric flow of gas of compressibility factor and standard state by the digital algorithm of optimizing, thereby has realized the high-precision measuring of gas flow.

Intelligent gas flowmeter of the present utility model, comprise intelligent head, mechanical pipe two parts, wherein: (a) the intelligence head is by housing, display screen, button, temperature sensor interface, temperature sensor line, temperature sensor, the bus transfer interface, pressure sensor interface, the pressure sensing line, pressure transducer, the flow sensor storehouse constitutes, the flow sensor storehouse is fixed on the intelligence head on the mechanical pipe with screw, the pressure sensor interface on the housing left side is connected pressure transducer on the mechanical pipe by sense line, the network interface on the housing left side connects on computers, the temperature sensor interface on housing the right is connected temperature sensor on the mechanical pipe by sense line, show the flow that adds up on the display screen on the housing respectively, instantaneous delivery, temperature, data such as pressure, the demonstration of these data is by switching by key control; (b) turbine and scroll bar gearing are installed in the mechanical pipe, the center pit that an end of scroll bar passes the flow sensor storehouse stretches in the intelligence head, and turbine, scroll bar transmission are imported traffic pulse in the intelligence head into by magnetoelectricity isolation transmission.

In the described intelligence head microprocessor, temperature modulate circuit, pressure modulate circuit, flow sensor, hardware counter, storer, system clock, the integrated circuit main board of power management are installed, the synthermal modulate circuit of microprocessor, pressure modulate circuit, flow sensor, hardware counter, storer, system clock, power management connect.

Each interface position on the described intelligence head can be according to design needs reversing of position.

What the display screen on the described intelligence head adopted is 10 LCD video datas, luminous display menu Chinese character and data unit.

Described temperature sensor is to adopt platinum sensor, and pressure transducer is to adopt diffuse si isolation diaphragm sensor.

Described microprocessor is control system precision, energy power consumption, data acquisition, data processing and mathematical model algorithm, data management.

What the power management in the described intelligence head adopted is built-in lithium battery, but continuous working 3 years.

Described intelligent gas flowmeter is applicable to the gasmetry of minute-pressure, low pressure, middle pressure, high-pressure medium, and pressure can be from 0～20kPa～100kPa～1000kPa～2500kPa.

Described intelligent gas flowmeter can be stored the data of clean gas consumption of nearest 12 months moon, nearest 12 start-stop times, clean gas consumption.The housing of intelligence head can be divided into upper casing and lower casing.

The utility model has the advantages that: product structure is simple, and is easy to use, and reliable operation and life-span are long, the system accuracy height; Little to gas disturbance susceptibility, good reproducibility; Intelligentized design and compressibility factor model resolve, and are applicable to any gas medium; Network data transmission is beneficial to data management and charge; The modular design of system software, the system that makes is suitable for the flow metering of minute-pressure, low pressure, middle pressure, high-pressure medium; The combination of software, hardware counting has realized the high precision that system's high precision collecting and low discharge are gathered.

The utility model has following accompanying drawing.

Fig. 1 is an external structure of the present utility model.

Fig. 2 is a theory diagram of the present utility model.

To describe the utility model in detail by the drawings and specific embodiments below, embodiment only limits to illustrate the utility model, does not influence the scope of claim protection.

The utility model is according to the structure separated into two parts, mechanical pipe 6 and intelligence 13.Wherein intelligent 13 is to be made of housing 1, display screen 2, button 3, temperature sensor interface 4, temperature sensor line 5, temperature sensor 12, bus transfer interface 7, pressure sensor interface 8, pressure sensing line 10, pressure transducer 11, flow sensor storehouse 9.

Flow sensor storehouse 9 usefulness screws are fixed on intelligence 13 on the mechanical pipe 6.The pressure sensor interface 8 on housing 1 left side is connected pressure transducer 11 on the mechanical pipe 6 by pressure sensing line 10.The network sensor interface 7 on housing 1 left side is connected with the communication port of computing machine, realizes the remote data transmission.The temperature sensor interface 4 on housing 1 the right is connected temperature sensor 12 on the mechanical pipe 6 by temperature sensor line 5.Display screen 2 on the housing 1 shows data such as the flow that adds up, instantaneous delivery, temperature, pressure respectively, and these data are switched demonstration by button 3 controls.Turbine and scroll bar gearing wherein are installed in the mechanical pipe 6, and the center pit that an end of transmission shaft passes flow sensor storehouse 9 imports flow signal into intelligent 13 by magnetoelectricity isolation conversion.(asking for an interview shown in Figure 1)

In the inside theory diagram (asking for an interview shown in Figure 2) of the utility model intelligence 13, in the intelligence 13 microprocessor, temperature modulate circuit, pressure modulate circuit, flow modulate circuit, hardware counter, storer, system clock, power management etc. are installed and are integrated on the circuit main board.The synthermal modulate circuit of microprocessor, pressure modulate circuit, flow sensor, hardware counter, storer, system clock, power management connect, realize measuring and data processing flow metering.

In the utility model, when gas (noncorrosive gases) passes through mechanical pipe 6, the turbine rotation will be rotatablely moved and be spread out of by turbine, scroll bar, gear train assembly, isolate being converted into traffic pulse by magnetoelectricity, for microprocessor processes; The temperature and pressure of the collection medium that the while microprocessor is real-time obtains the volumetric flow of gas of compressibility factor and standard state by the algorithm of optimizing, thereby has realized the high-precision measuring of gas flow.

Product of the present utility model is multidisciplinary theories such as integrated gas dynamics, fluid mechanics, electromagnetics, single-chip microcomputer theory, little power consumption technology, digital network communication, adopts a kind of new gas flowmeter of advanced optimal design.

Product of the present utility model has temperature, pressure, the flow of detected gas in real time, and can carry out temperature, pressure compensation and compressibility factor correction automatically; Utilize little power consumption design, the serviceable life of having improved battery; Network communication interface, network management and detection have been realized; Have functions such as data are stored automatically, inquired about, processing; It is the essential product that industrial automation detects, measures, controls, manages.

Product of the present utility model can be widely used in the metering of user's consumption, the charge of coal gas, rock gas; The metering of conveyance conduit, pressure-reducing station, control; The industry measurement of other noncorrosive gases, control; It is the standard utensil of gas dosing.

Claims

1, intelligent gas flowmeter comprises intelligence head, mechanical pipe two parts, it is characterized in that:

(a) intelligence head (13) is by housing (1), display screen (2), button (3), temperature sensor interface (4), temperature sensor line (5), temperature sensor (12), bus transfer interface (7), pressure sensor interface (8), pressure sensing line (10), pressure transducer (11), flow sensor storehouse (9) constitutes, flow sensor storehouse (9) is fixed on intelligence head (13) on the mechanical pipe (6) with screw, the pressure sensor interface (8) on housing (1) left side is connected pressure transducer (11) on the mechanical pipe (6) by sense line (10), the network sensor interface (7) on housing (1) left side connects on computers, the temperature sensor interface (4) on housing (1) the right is connected temperature sensor (12) on the mechanical pipe (6) by sense line (5), show instantaneous delivery respectively on the display screen (2) on the housing (1), integrated flux, temperature, pressure data switches by button (3) control;

(b) in the mechanical pipe (6) turbine and scroll bar gearing are installed, the center pit that an end of scroll bar passes flow sensor storehouse (9) stretches in the intelligence head (13), and turbine, scroll bar transmission adopt magnetoelectricity to isolate gearing.

2, gas meter according to claim 1, it is characterized in that: in intelligence head (13) microprocessor, temperature modulate circuit, pressure modulate circuit, flow sensor, hardware counter, storer, system clock, the integrated circuit main board of power management are installed, the synthermal modulate circuit of microprocessor, pressure modulate circuit, hardware counter, storer, system clock, power management connect.

3, according to claim 1,2 described gas meters, it is characterized in that: each interface position on the intelligence head (13) can be according to design needs reversing of position.

4, according to claim 1,2 described gas meters, it is characterized in that: what the display screen (2) on the intelligence head (13) adopted is 10 LCD video datas, luminous display menu Chinese character and data unit.

5, according to claim 1,2 described gas meters, it is characterized in that: the temperature sensor in the intelligence head (13) is to adopt platinum sensor, and pressure transducer is to adopt diffuse si isolation diaphragm sensor.

6, according to claim 1,2 described gas meters, it is characterized in that: microprocessor is control system precision, energy power consumption, data acquisition, data processing and mathematical model algorithm, data management.

7, according to claim 1,2 described gas meters, it is characterized in that: what the power management in the intelligence head (13) adopted is built-in lithium battery, but continuous working 3 years.

8, according to claim 1,2 described gas meters, it is characterized in that: this flowmeter is applicable to the gasmetry of minute-pressure, low pressure, middle pressure, high-pressure medium, and pressure can be from 0～20kPa～100kPa～1000kPa～2500kPa.

9, according to claim 1,2 described gas meters, it is characterized in that: this flowmeter can be stored the data of clean gas consumption of nearest 12 months moon, nearest 12 start-stop times, clean gas consumption.

10, according to claim 1,2 described gas meters, it is characterized in that: the housing (1) of intelligence head (13) can be divided into upper casing and lower casing.