CN208350144U - A kind of gas flowmeter - Google Patents
A kind of gas flowmeter Download PDFInfo
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- CN208350144U CN208350144U CN201821101129.1U CN201821101129U CN208350144U CN 208350144 U CN208350144 U CN 208350144U CN 201821101129 U CN201821101129 U CN 201821101129U CN 208350144 U CN208350144 U CN 208350144U
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- fluid channel
- detecting device
- gas flowmeter
- pressure
- temperature
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Abstract
The utility model relates to gas process fields of measurement, a kind of gas flowmeter includes that shell in the enclosure interior has a fluid channel, eddy generator is equipped in the contraction section of the fluid channel, despinner is fixed in the outlet section of the fluid channel, it is equipped with temperature-detecting device on the housing, pressure-detecting device and frequency detecting device are equipped in the diffuser of the fluid channel, the gas flowmeter further includes interconnecting piece, one end of the interconnecting piece is connected with Flow Meter Based, and the other end of the interconnecting piece is fixed on the housing.The utility model non mechanical movable, not perishable, reliable and stable, the service life is long, and longtime running need not special dimension；Effectively inhibit interference signal caused by vibration and pressure oscillation；Intelligent flowmeter integrates flow probe, microprocessor, pressure, temperature sensor, takes built-in combination, keeps structure more compact, improves detection accuracy.
Description
Technical field
The utility model relates to gas process fields of measurement, especially a kind of gas flowmeter.
Background technique
Intelligent liquid turbine flowmeter is sensed using the turbine flow of advanced super low-power consumption single chip microcomputer technology development
Device and the display integrated New Type of Intelligent Instrument of integrating have compact mechanism, the visual and clear, high reliablity of reading, not by the external world
The obvious advantages such as power supply disturbance, anti-lightning, at low cost.Flow velocity is first converted to the revolving speed of turbine by it, then by revolving speed be converted into
The directly proportional electric signal of flow.This flowmeter is frequency for detecting instantaneous flow and total flow integration, output signal,
It is easy to digitize.But the detection accuracy of intelligent liquid turbine flowmeter existing at present is not high, is easy to happen error.
Utility model content
For the defects in the prior art, the utility model provides a kind of gas flowmeter, overcomes the prior art not
Foot, further increases detection accuracy.
To achieve the goals above, a kind of gas flowmeter provided by the utility model, including shell is in the shell
Portion has a fluid channel, eddy generator is equipped in the contraction section of the fluid channel, in the outlet section of the fluid channel
It is fixed with despinner, is equipped with temperature-detecting device on the housing, is equipped with pressure detecting in the diffuser of the fluid channel
Device and frequency detecting device, the gas flowmeter further include interconnecting piece, one end and the Flow Meter Based phase of the interconnecting piece
Even, the other end of the interconnecting piece is fixed on the housing.
As a kind of preferred embodiment of the application, the eddy generator is the helical blade with fixed angle.
As a kind of preferred embodiment of the application, it is respectively arranged in the inducer and outlet section of the fluid channel
Flange.
As a kind of preferred embodiment of the application, the temperature-detecting device includes using Pt100 platinum resistance as temperature
The temperature sensor of sensing element, the signal input part phase of the signal output end of the temperature sensor and the Flow Meter Based
Even.
As a kind of preferred embodiment of the application, the pressure-detecting device includes being with pressure resistance type diffusion silicon bridge road
The pressure sensor of sensing element, the signal input part phase of the signal output end of the pressure sensor and the Flow Meter Based
Even.
As a kind of preferred embodiment of the application, the frequency detecting device includes piezoeletric quartz sensor, described
Transistor sensor is set to the throat of the diffuser of fluid channel.
As a kind of preferred embodiment of the application, the gas flowmeter includes amplifier, A/D converter, preposition
Amplifier, microprocessor and liquid crystal display；The signal output end of the temperature sensor and the pressure sensor with it is described
The signal input part of amplifier is connected, and the signal output end of the amplifier is connected with the signal input part of the A/D converter,
The signal output end of the A/D converter is connected with the signal input part of the microprocessor, the piezoeletric quartz sensor
Signal output end is connected with the signal input part of preamplifier, the signal output end of the preamplifier and microprocessor
Signal input part is connected, and the microprocessor and the liquid crystal display are electrically connected.
The beneficial effects of the utility model are: the utility model non mechanical movable, not perishable, reliable and stable, the longevity
Life length, longtime running need not special dimensions；Effectively inhibit interference signal caused by vibration and pressure oscillation；Intelligent flowmeter
Integrate flow probe, microprocessor, pressure, temperature sensor, take built-in combination, keep structure more compact, improves
Detection accuracy.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model gas flowmeter embodiment；
Fig. 2 is the cross-sectional view of the utility model gas flowmeter embodiment；
Fig. 3 is the state diagram of the utility model fluid embodiment after entering fluid channel；
Fig. 4 is the block diagram of the utility model gas flowmeter embodiment；
Fig. 5 is the flow chart of the utility model gas flow measurement embodiment of the method.
Specific embodiment
Specific embodiment of the utility model is described more fully below, it should be noted that the embodiments described herein is served only for
For example, being not intended to limit the utility model.In the following description, in order to provide the thorough understanding to the utility model,
Elaborate a large amount of specific details.It will be apparent, however, to one skilled in the art that: these certain details need not be used
Section is to carry out the utility model.In other instances, in order to avoid obscuring the utility model, well known circuit is not specifically described,
Software or method.
Throughout the specification, meaning is referred to " one embodiment ", " embodiment ", " example " or " example "
: a particular feature, structure, or characteristic described in conjunction with this embodiment or example is comprised at least one implementation of the utility model
In example.Therefore, the phrase " in one embodiment " in each place appearance of the whole instruction, " in embodiment ", " one
Example " or " example " are not necessarily all referring to the same embodiment or example.Furthermore, it is possible in any suitable combination and or sub-portfolio
By specific feature, structure or characteristic combination in one or more embodiment or examples.In addition, those of ordinary skill in the art
It should be appreciated that diagram is provided to the purpose of explanation provided herein, and diagram is not necessarily drawn to scale.
As shown in Figure 1-3, gas flowmeter shown in first implementation of the utility model includes shell 2 in the shell
There is a fluid channel inside body 2, eddy generator 1 is equipped in the contraction section of the fluid channel, in the fluid channel
Outlet section is fixed with despinner 7, and temperature-detecting device 4 is equipped on the shell 2, is equipped in the diffuser of the fluid channel
Pressure-detecting device 5 and frequency detecting device 6, the gas flowmeter further include interconnecting piece, one end of the interconnecting piece and stream
It measures calculating instrument 3 to be connected, the other end of the interconnecting piece is fixed on the shell 2.
Firstly, when fluid is by generating violent eddy-currents 9 behind eddy generator 1, and pass through the fluid channel
Diffuser be in the center 10 of the violent eddy-currents 9 wherein violent eddy-currents inside fluid channel；Two are carried out again
Secondary rotation forms the vortex precession 11 of gyroscope type.Enter the fluid in fluid channel using the temperature-detecting device 4 detection
Temperature detects local atmospheric pressure value using the pressure-detecting device 5, and utilizes described 6 pairs of frequency detecting device vortex
The frequency of precession is detected.Above-mentioned detection data is transferred to Flow Meter Based 3, the Flow Meter Based 3 is according to above-mentioned
The volumetric flow units of gas under the status of criterion are calculated in detection data.In addition, the despinner 7 is fixed on outlet flow channels
Section, effect are to eliminate eddy-currents, to reduce the influence to downstream instrument function.
Secondly, the volume flow of gas under the status of criterion is calculated according to above-mentioned detection data for the Flow Meter Based 3
Value includes: the volumetric flow units that the gas under operating condition is obtained according to the frequency of the vortex precession, will acquire local atmospheric pressure
The volumetric flow units of gas under value, temperature value, pressure value and operating condition substitute into equation of gaseous state:
Wherein QNFor the volumetric flow units of gas under the status of criterion, QVFor the volumetric flow units of the gas under operating condition, PaFor local atmospheric pressure
Force value, P are the pressure value in fluid channel, PNFor the atmospheric pressure value under standard state, TNFor gas in normal conditions exhausted
To temperature, T is the absolute temperature of detected fluid；ZNFor the compressed coefficient of gas at standard conditions；Z is gas under operating condition
The compressed coefficient.Z is taken when with bell jar or negative pressure calibrationN/ Z=1, to natural gas (ZN/Z)1/2=FZFor supercompressibility factor.By China
Formula in the standard SY/T6143-1996 of Oil and Natural Gas Corporation calculates.
Further, since the frequency of vortex precession is directly proportional to the volumetric flow units of the gas under operating condition, so when obtaining
It takes the frequency of vortex precession that the volumetric flow units of the gas under the operating condition can be obtained, is to those skilled in the art
The prior art, details are not described herein again.
In the present embodiment, the eddy generator 1 is the helical blade with fixed angle.
Specifically, the helical blade is made of aluminium alloy, and according to practical situation with certain angle, and
And it is fixed on the contraction section front of fluid channel, forced fluid generates strong eddy-currents.
In the present embodiment, flange 8 is respectively arranged in the inducer and outlet section of the fluid channel.
Specifically, the gas flowmeter can be mounted on pipeline by the flange 8, it is further to be allowed to practicability
Enhancing.
In the present embodiment, the temperature-detecting device 4 includes using Pt100 platinum resistance as the temperature sensing of temperature-sensing element (device)
Device, the signal output end of the temperature sensor are connected with the signal input part of the Flow Meter Based 3.
Specifically, the Pt100 platinum resistance is in certain temperature range, resistance value and temperature are at corresponding relationship.It has
It is quick on the draw, detection accuracy is high, and production cost is low to be waited a little.It needs to be illustrated, in other one or some realities
Applying in example can also be substituted herein using other kinds of temperature sensor with regard to not enumerated one by one.
In the present embodiment, the pressure-detecting device 5 includes spreading silicon bridge road using pressure resistance type to pass as the pressure of sensing element
Sensor, the signal output end of the pressure sensor are connected with the signal input part of the Flow Meter Based 3.
Specifically, under ambient pressure effect performance of expected change can occur for described pressure resistance type diffusion its arm resistance of silicon bridge road,
Therefore under the effect of certain exciting current, the potential difference of two output end is directly proportional to ambient pressure.Furthermore in others one
In a or some embodiments, other kinds of pressure sensor can also be used.
In the present embodiment, the frequency detecting device 6 includes piezoeletric quartz sensor, and the transistor sensor is set to
The throat of the diffuser of fluid channel.
As shown in figure 4, the gas flowmeter includes amplifier, A/D converter, preamplifier, microprocessor and liquid
Crystal display screen；The signal input part phase of the signal output end of the temperature sensor and the pressure sensor and the amplifier
Even, the signal output end of the amplifier is connected with the signal input part of the A/D converter, the signal of the A/D converter
Output end is connected with the signal input part of the microprocessor, the signal output end of the piezoeletric quartz sensor and preposition amplification
The signal input part of device is connected, and the signal output end of the preamplifier is connected with the signal input part of microprocessor, described
Microprocessor and the liquid crystal display are electrically connected.
Wherein, 16 computer chips are used in the present embodiment, integrated level is high, and small in size, performance is good, and complete machine function is strong.It adopts
With lattice display screen, figure place showing is more, reads intuitive and convenient, can directly display volume flow, the standard under working condition
The parameters such as volume flow, total amount and pressure medium, temperature under state.Using EEPROM technology, parameter setting is convenient, can
Persistence, and can be reserved for for up to 1 year historical data.The exportable frequency pulse of converter, 4~20mA analog signal, 4
~20mA+HART, and there is RS485 interface, it can directly and microcomputer network, transmission range is up to 1.2km.More physical index reports
Alert output, can be one of optional by user.Overall Power Consumption is low, and available interior battery power supply, can also external power supply.
As shown in figure 5, gas flow measurement method shown in the second embodiment of the utility model, is suitable for this reality
The gas flowmeter described in novel first implementation, includes the following steps:
S1 generates violent eddy-currents after enabling flow through the eddy generator；
S2, the diffuser for making the violent eddy-currents enter fluid channel carry out the vortex that secondary rotating forms gyroscope type
Precession；
S3 detects the temperature-detecting device to the temperature value of the fluid under the operating condition in fluid channel, makes institute
It states pressure-detecting device to detect local atmospheric pressure value, examines the frequency detecting device to the frequency of vortex precession
It surveys；And above-mentioned testing result is transferred to the gas flowmeter, the gas flowmeter is obtained according to the testing result
The volumetric flow units of gas under the status of criterion.
In the present embodiment, the gas flowmeter obtains the volume flow of gas under the status of criterion according to the testing result
Value includes:
The volumetric flow units that the gas under operating condition is obtained according to the frequency of the vortex precession, will acquire local atmospheric pressure
The volumetric flow units of gas under value, temperature value, pressure value and operating condition substitute into equation of gaseous state:
Wherein QNFor the volumetric flow units of gas under the status of criterion, QVFor the volumetric flow units of the gas under operating condition, PaFor local atmospheric pressure
Force value, P are the pressure value in fluid channel, PNFor the atmospheric pressure value under standard state, TNFor gas in normal conditions exhausted
To temperature, T is the absolute temperature of detected fluid；ZNFor the compressed coefficient of gas at standard conditions；Z is gas under operating condition
The compressed coefficient.Z is taken when with bell jar or negative pressure calibrationN/ Z=1, to natural gas (ZN/Z)1/2=FZFor supercompressibility factor.By China
Formula in the standard SY/T6143-1996 of Oil and Natural Gas Corporation calculates.
In addition, unmentioned each constituent element and its working method about gas flowmeter and sheet in the present embodiment
Contained fundamental type is just not repeated herein in the first embodiment of application.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type, should all cover in the claim of the utility model and the range of specification.
Claims (7)
1. a kind of gas flowmeter, it is characterised in that: there is a fluid channel in the enclosure interior including shell, in the stream
The contraction section in body channel is equipped with eddy generator, is fixed with despinner in the outlet section of the fluid channel, on the housing
Equipped with temperature-detecting device, pressure-detecting device and frequency detecting device, the gas are equipped in the diffuser of the fluid channel
Flowmeter body further includes interconnecting piece, and one end of the interconnecting piece is connected with Flow Meter Based, and the other end of the interconnecting piece is fixed
On the housing.
2. gas flowmeter according to claim 1, it is characterised in that: the eddy generator is with fixed angle
Helical blade.
3. gas flowmeter according to claim 1, it is characterised in that: in the inducer and outlet section of the fluid channel
It is respectively arranged with flange.
4. gas flowmeter according to claim 1, it is characterised in that: the temperature-detecting device includes with Pt100 platinum
Resistance is the temperature sensor of temperature-sensing element (device), the letter of the signal output end of the temperature sensor and the Flow Meter Based
Number input terminal is connected.
5. gas flowmeter according to claim 4, it is characterised in that: the pressure-detecting device includes being expanded with pressure resistance type
Dissipate the pressure sensor that silicon bridge road is sensing element, the letter of the signal output end of the pressure sensor and the Flow Meter Based
Number input terminal is connected.
6. gas flowmeter according to claim 5, it is characterised in that: the frequency detecting device includes that piezo-electric crystal passes
Sensor, the transistor sensor are set to the throat of the diffuser of fluid channel.
7. gas flowmeter according to claim 6, it is characterised in that: the gas flowmeter includes amplifier, A/D turns
Parallel operation, preamplifier, microprocessor and liquid crystal display；The output of the signal of the temperature sensor and the pressure sensor
End is connected with the signal input part of the amplifier, and the signal output end of the amplifier and the signal of the A/D converter are defeated
Enter end to be connected, the signal output end of the A/D converter is connected with the signal input part of the microprocessor, the piezo-electric crystal
The signal output end of sensor is connected with the signal input part of preamplifier, the signal output end of the preamplifier with it is micro-
The signal input part of processor is connected, and the microprocessor and the liquid crystal display are electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821101129.1U CN208350144U (en) | 2018-07-11 | 2018-07-11 | A kind of gas flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821101129.1U CN208350144U (en) | 2018-07-11 | 2018-07-11 | A kind of gas flowmeter |
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| CN208350144U true CN208350144U (en) | 2019-01-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709594A (en) * | 2018-07-11 | 2018-10-26 | 陕西鑫联仪器仪表有限公司 | A kind of gas flowmeter and gas flow measurement method |
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2018
- 2018-07-11 CN CN201821101129.1U patent/CN208350144U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709594A (en) * | 2018-07-11 | 2018-10-26 | 陕西鑫联仪器仪表有限公司 | A kind of gas flowmeter and gas flow measurement method |
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