CN202562533U - A gas flow measuring device metering from zero - Google Patents
A gas flow measuring device metering from zero Download PDFInfo
- Publication number
- CN202562533U CN202562533U CN2012202299936U CN201220229993U CN202562533U CN 202562533 U CN202562533 U CN 202562533U CN 2012202299936 U CN2012202299936 U CN 2012202299936U CN 201220229993 U CN201220229993 U CN 201220229993U CN 202562533 U CN202562533 U CN 202562533U
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- zero
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- gas
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Abstract
The present utility model relates to a gas flow measuring device metering from zero, which includes a gas flow measuring device main body, a signal processing device mounted on the main body and used for displaying gas flow, a to-be-measured gas inlet and a to-be-measured gas outlet both disposed on the main body, and a hot-type mass flow sensor, a pressure sensor and a precession vortex flow meter probe all respectively disposed on the gas path channel from the to-be-measured gas inlet to the to-be-measured gas outlet and having their signals connected with the signal processing device. The present utility model has novel and simple structure, basically solves the problem of existing small gas flow measurement via combined sensors, and realizes metering and display of flow measurement from zero.
Description
Technical field
The utility model relates to the flow measurement field of gas, particularly a kind of gas flow measurement device from " zero " metering.
Background technology
For the flow measurement of gas, the measurement of low discharge is a key point and difficult point, and it has not only reacted the measurement performance of measurement mechanism or instrument, also is the technical essential that at present a lot of fields are concerned about very much.Find through investigation; For the flow measurement of gas, following several kinds of forms are arranged basically: 1, differential pressure flowmeter now: this flowmeter with a long history has very strong experimental data as the basis; But receive the restriction of differential pressure transmitter; Its range ratio and can't be measured low discharge generally between 1:3～1:10, can not satisfy the demand; 2, velocity flowmeter: this flowmeter can keep well linear in the range ratio scope of 1:10～1:15, but for the low discharge of flow velocity less than 5m/s, can not reach good measurement effect; 3, Coriolis flowmeter: though Coriolis flowmeter can be measured the gas of low discharge, cost an arm and a leg, and, can not accomplish accurate measurement for low discharge very.
Summary of the invention
The purpose of the utility model is a kind of gas flow measurement device technique scheme from " zero " metering that proposes to the problems referred to above; This scheme utilizes the combination function of multiple sensors to realize from " zero " metering gas flow through multiple sensors is set in flowmeter.
To achieve these goals; The scheme of the utility model is: a kind of gas flow measurement device from " zero " metering; Comprise the gas flow measurement device body, the signal processing apparatus that shows gas flow is installed on body, said body is provided with tested gas feed and tested gas feed; Wherein, the gas channels from tested gas feed to tested gas feed is respectively arranged with thermal mass flow sensor, pressure transducer and vortex precession flowmeter probe; The signal of said thermal mass flow sensor, pressure transducer and vortex precession flowmeter probe is connected to signal processing apparatus.
Said tested gas feed is a spiral vortex type flowmeter passage to the gas channels of tested gas feed; Tested gas feed place at passage is provided with eddy generator, and said thermal mass flow sensor, pressure transducer and vortex precession flowmeter probe vertically are arranged on after the eddy generator successively.
Said signal processing apparatus comprises signal acquisition circuit, digital processing circuit, output circuit, operation push-button and display screen; Said thermal mass flow sensor, pressure transducer and vortex precession flowmeter probe signal are delivered to signal acquisition circuit; Signal acquisition circuit is passed to digital processing circuit with signal; Signal after digital processing circuit will be handled shows at display screen; Said output circuit is that said operation push-button is connected with digital processing circuit by the 4～20mA analog quantity delivery outlet and the RS485 communication interface of digital processing circuit output.
The beneficial effect that the utility model produces is: simple in structure, fundamentally solved an existing little gas flow measurement difficult problem through combination sensor, and realized that the zero-based metering of flow measurement shows.
Below in conjunction with accompanying drawing and embodiment the utility model is made a detailed description.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model signal processing apparatus circuit block diagram;
Fig. 3 is the utility model spiral vortex type flowmeter structure synoptic diagram.
Embodiment
A kind of gas flow measurement device embodiment from " zero " metering; Referring to Fig. 1 and Fig. 2; Said device comprises gas flow measurement device body 1, and the signal processing apparatus 2 that shows gas flow is installed on body, and said body is provided with tested gas feed 1-1 and tested gas feed 1-2; Wherein, the gas channels 1-3 from tested gas feed to tested gas feed is respectively arranged with thermal mass flow sensor 3, pressure transducer 4 and vortex precession flowmeter probe 5; The signal of said thermal mass flow sensor, pressure transducer and vortex precession flowmeter probe is connected to signal processing apparatus; The form that the tested gas feed of device body adopts flange 6 to connect to tested gas feed
The sensor of thermal mass flow described in the embodiment, pressure transducer and vortex precession flowmeter probe are sealed in the metal handle 1-4 of body simultaneously, and the end 1-5 of metal handle installs the signal processing apparatus that shows gas flow.Said signal processing apparatus comprises signal acquisition circuit 2-1, digital processing circuit 2-2, output circuit 2-3, operation push-button 2-4 and display screen 2-5; Said thermal mass flow sensor, pressure transducer and vortex precession flowmeter probe signal are delivered to signal acquisition circuit; Signal acquisition circuit is passed to digital processing circuit with signal; Signal after digital processing circuit will be handled shows at display screen; Said output circuit is that said operating key is connected with digital processing circuit by the 4～20mA analog quantity delivery outlet and the RS485 communication interface of digital processing circuit output; Certainly, also comprise power circuit in the said signal processing apparatus, said power circuit can be supported AC180V～AC235V or DC18V～DC36V.Said digital processing circuit is little process chip, is a kind of mature technology, has adopted the pure digi-tal processing, at a high speed, accurate, anti-interference.Said output circuit can be supported the output of (4～20) mA analog quantity, pulse output, and support the RS485 communication.Said operation push-button partly is a button operation, and said display screen is 4 row LCDs, has backlight.
Present embodiment is the improvement of on the basis of embodiment 1, carrying out; The part identical in the present embodiment with embodiment 1; Please understand with reference to disclosed content among the embodiment 1, embodiment 1 disclosed content should not be repeated in this description as the content of present embodiment here yet.
With reference to Fig. 3; The said tested gas feed of present embodiment is a spiral vortex type flowmeter passage to the gas channels of tested gas feed; Tested gas feed place at passage is provided with eddy generator 7, and said thermal mass flow sensor, pressure transducer and vortex precession flowmeter probe vertically are arranged on after the eddy generator successively.
Claims (3)
- One kind from " zero " metering the gas flow measurement device; Comprise the gas flow measurement device body; The signal processing apparatus that shows gas flow is installed on body; Said body is provided with tested gas feed and tested gas feed, it is characterized in that, the gas channels from tested gas feed to tested gas feed is respectively arranged with thermal mass flow sensor, pressure transducer and vortex precession flowmeter probe; The signal of said thermal mass flow sensor, pressure transducer and vortex precession flowmeter probe is connected to signal processing apparatus.
- 2. a kind of gas flow measurement device according to claim 1 from " zero " metering; It is characterized in that; Said tested gas feed is a spiral vortex type flowmeter passage to the gas channels of tested gas feed; Tested gas feed place at passage is provided with eddy generator, and said thermal mass flow sensor, pressure transducer and vortex precession flowmeter probe vertically are arranged on after the eddy generator successively.
- 3. a kind of gas flow measurement device from " zero " metering according to claim 1 is characterized in that said signal processing apparatus comprises signal acquisition circuit, digital processing circuit, output circuit, operation push-button and display screen; Said thermal mass flow sensor, pressure transducer and vortex precession flowmeter probe signal are delivered to signal acquisition circuit; Signal acquisition circuit is passed to digital processing circuit with signal; Signal after digital processing circuit will be handled shows at display screen; Said output circuit is that said operation push-button is connected with digital processing circuit by the 4～20mA analog quantity delivery outlet and the RS485 communication interface of digital processing circuit output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202299936U CN202562533U (en) | 2012-05-22 | 2012-05-22 | A gas flow measuring device metering from zero |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202299936U CN202562533U (en) | 2012-05-22 | 2012-05-22 | A gas flow measuring device metering from zero |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202562533U true CN202562533U (en) | 2012-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202299936U Expired - Lifetime CN202562533U (en) | 2012-05-22 | 2012-05-22 | A gas flow measuring device metering from zero |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202562533U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075760A (en) * | 2014-03-07 | 2014-10-01 | 卢玖庆 | Flowmeter for gas and liquid |
| CN109189109A (en) * | 2018-09-29 | 2019-01-11 | 广州南控自动化设备有限公司 | A kind of precision gas flow automatic control system |
-
2012
- 2012-05-22 CN CN2012202299936U patent/CN202562533U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075760A (en) * | 2014-03-07 | 2014-10-01 | 卢玖庆 | Flowmeter for gas and liquid |
| CN109189109A (en) * | 2018-09-29 | 2019-01-11 | 广州南控自动化设备有限公司 | A kind of precision gas flow automatic control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170622 Address after: 101399 Beijing City Cai Industrial Park Shunyi District Nancai town CAIDA Street No. 102 Building No. Patentee after: Beijing Fortune Technology Development Co., Ltd. Address before: 101300 Beijing City Cai Industrial Park Shunyi District Nancai town CAIDA Street No. 1 Patentee before: Beijing Fishermeter Instrument Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121128 |