CN102095460A - Low-velocity wide-range gas mass flowmeter - Google Patents
Low-velocity wide-range gas mass flowmeter Download PDFInfo
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- CN102095460A CN102095460A CN2010105728483A CN201010572848A CN102095460A CN 102095460 A CN102095460 A CN 102095460A CN 2010105728483 A CN2010105728483 A CN 2010105728483A CN 201010572848 A CN201010572848 A CN 201010572848A CN 102095460 A CN102095460 A CN 102095460A
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Abstract
The invention relates to the technical field of gas flow measurement, and in particular relates to a low-velocity wide-range gas mass flowmeter. The low-velocity wide-range gas mass flowmeter is characterized in that a measurement via hole vertical to the axis of a guide pipe is formed on the wall of the guide pipe; a measurement pipe is arranged in the measurement via hole; a separator is placed in the measurement pipe to divide the measurement pipe into two independent channels; the lower end of the measurement pipe is closed; two fluid via holes respectively communicated with the two independent channels are formed on the wall of the lower end part of the measurement pipe; a lower flange is arranged on the upper end part of the measurement pipe; a sensor base has a central via hole; an upper flange is arranged on the lower end of the sensor base; the upper flange has a via hole for mounting the measurement pipe; a sensor is arranged in the via hole of the sensor base; and the upper flange is connected with the lower flange. The low-velocity wide-range gas mass flowmeter has the advantages of simple structure, low cost, wide measurement range, high measurement accuracy and the like.
Description
Technical field
The present invention relates to gas flow detection technique field, specifically a kind of simple in structure, measuring accuracy is high, the pressure loss is little low flow velocity wide-range mass-flow gas meter.
Background technology
As everyone knows, flow measurement is widely used in commercial production and other field, as oil, chemical industry, steel-making, heat supply, national defence, meteorology, food, medicine, building, the people's livelihood etc., along with further refinement requirement, further requirement has been proposed all for the use and the accuracy of flow measurement device to technological process.The measurement of torch gas, the air measuring of the blowing device of steelworks, coal gas, the natural gas transport flow, occasions such as flue gas flow measuring amount, the common feature of these application scenarios is that pipe diameter is big, a lot of DN800 that surpass, discharge pressure is low, flow is big relatively, pressure is relatively low, the pressure of this moment is often low to having only several kPas, so common conventional flowmeter, no matter adopt the flowmeter that still adopts the volume principle to make of Throttle Principle, its deficiency is that the pressure loss is bigger, measuring accuracy is low, especially traditional Throttle Principle flowmeter has no idea accurately to measure at all, adds the bulky of flowmeter bodies, processing, transportation, install, safeguard all difficultly, the cost increase is very big.
At present, also go out to serve the flowmeter of putting forth effort to solve this kind occasion problems of measurement in the industry.It is external import that this class flowmeter begins, and costs an arm and a leg.Domestic afterwards reference foreign technology has also been copied the flowmeter of several similar principles, and it adopts differential pressure principle to make, so the differential pressure that forms is also very low, common differential pressure pick-up is difficult to accurately measure, and causes flow measurement inaccurate, and zero point drift is serious, the high deficiency of cost.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose the low flow velocity wide-range mass-flow gas meter that a kind of no pressure loss, volume are little, easy to operate, need not carry out the temperature and pressure compensation.
The present invention can reach by following measure.
A kind of low flow velocity wide-range mass-flow gas meter, be provided with table body and sensor base, the table body is one section conduit, the two ends of conduit are respectively equipped with flange, the tube wall that it is characterized in that conduit is provided with the metering through hole perpendicular to the conduit axis, be provided with gauge line in the metering through hole, be provided with division board in the gauge line, gauge line is divided into two independently passages in the division board, the gauge line lower end closed, the tube wall of the bottom of gauge line is provided with two fluid through-holes that are connected with two autonomous channels respectively, and the gauge line upper end is provided with lower flange, and sensor base is provided with central through hole, the sensor base lower end is provided with upper flange, upper flange is provided with the through hole that gauge line is installed, and is provided with sensor in the sensor base through hole, and upper flange is connected with lower flange.
Lower flange of the present invention is connected with the tube wall of conduit through support or spider, to increase the stability of gauge line.
The present invention can be provided with at least two fluid through-holes on the tube wall of a passage of gauge line, carry out the measurement of different-diameter point, improves measuring accuracy, to adapt to the detection of different bore table body canals.
Sensor of the present invention can be located at the bottom of sensor base through hole, and sensing data line via through holes is drawn, and sensor also can be with the interior upper end that sensor is located at the sensor base through hole.
Gas of the present invention becomes the simple function relation at the flow of table body canal with the flow in the large pipeline, thereby record the flow that table body canal low discharge obtains large pipeline, be applicable to multiple drainage form and size, better react the actual conditions of gas flow in the large pipeline, can adopt spot measurement and multi-point average to measure, sampling value is more reasonable, has following advantage: 1, simple in structure, processing, transportation, erected cost are low, easily send out dress, safeguard; 2, the pressure loss is extremely low, can ignore; 3, measure the flow broad quantum, far above traditional differential pressure type, volume class and speed class flowmeter; 4, accuracy of measurement height; 5, the temperature and pressure sensor need not be installed, directly export the mass rate of gas.
Description of drawings.
Fig. 1 is that synoptic diagram is adorned with novel structure in this pass.
Fig. 2 is the structural representation of gauge line among the present invention.
Fig. 3 is the another kind of structural representation of gauge line among the present invention.
Fig. 4 is a sensor profile synoptic diagram among the present invention.
Embodiment.
Below in conjunction with accompanying drawing the present invention is further described.
As shown in drawings, a kind of low flow velocity wide-range mass-flow gas meter, be provided with table body 1 and sensor base 2, table body 1 is one section conduit, the two ends of conduit are respectively equipped with flange 3, the tube wall that the invention is characterized in conduit 1 is provided with the metering through hole perpendicular to the conduit axis, be provided with gauge line 4 in the metering through hole, be provided with division board 5 in the gauge line 4, gauge line 4 is divided into two independently passages in the division board 5, and division board 5 is located at the middle place of gauge line 4, gauge line 4 is divided into two, gauge line 4 lower end closed, the tube wall of the bottom of gauge line 4 are provided with two fluid through-holes that are connected with two autonomous channels respectively, and the gauge line upper end is provided with lower flange 6, lower flange 6 is connected with the tube wall of conduit through support or spider, to increase the stability of gauge line, sensor base 2 is provided with central through hole, and sensor base 2 lower ends are provided with upper flange 7, upper flange 7 is provided with the through hole that gauge line is installed, be provided with sensor 8 in sensor base 2 through holes, upper flange 6 is connected with lower flange 7
The present invention can be provided with at least two fluid through-holes on the tube wall of the inlet channel of gauge line 4, carry out the measurement of different-diameter point, improve measuring accuracy, to adapt to the detection of different bore table body canals, in addition, sensor 8 of the present invention can be located at the bottom of sensor base 2 through holes, and sensing data line via through holes is drawn, sensor 8 also can be with the interior upper end that sensor is located at the sensor base through hole
The present invention draws a low discharge in large pipeline, through low flow sensor, low flow sensor adopts thermal resistance constant difference method, what measure is voltage signal, enter single-chip microcomputer through the A/D change-over circuit, the funtcional relationship that single-chip microcomputer obtains according to demarcation, calculate conversion, thereby can show the flow in the large pipeline, the transmission that also can realize analog current measures flow in the drainage tube, and this flow becomes the simple function relation with flow in the large pipeline, can know flow in the pipeline, the multicomponent gas flow measurement of stablizing blending ratio in suitable single-component gas flow measurement or the process, low flow velocity wide-range mass-flow gas meter at this point, the low flow sensor that adopts, thus can realize the range ability of maximum 300:1.
The present invention draws a low discharge in large pipeline, through flowing out the drainage tube assembly behind the low flow sensor, again import in the large pipeline, the draining hole of drainage tube can be multiple shape, also can adopt the porous mode, thereby produce certain flow rate at low flow sensor place, this flow velocity must become simple relation with the large pipeline flow velocity, makes things convenient for the back data processing.
Gas of the present invention becomes the simple function relation at the flow of table body canal with the flow in the large pipeline, thereby record the flow that table body canal low discharge obtains large pipeline, be applicable to multiple drainage form and size, better react the actual conditions of gas flow in the large pipeline, can adopt spot measurement and multi-point average to measure, sampling value is more reasonable, has following advantage: 1, simple in structure, processing, transportation, erected cost are low, easily send out dress, safeguard; 2, the pressure loss is extremely low, can ignore; 3, measure the flow broad quantum, far above traditional differential pressure type, volume class and speed class flowmeter; 4, accuracy of measurement height; 5, the temperature and pressure sensor need not be installed, directly export the mass rate of gas.A kind of gas flow detection technique field that the present invention relates to, specifically a kind of simple in structure, measuring accuracy is high, the pressure loss is little low flow velocity wide-range mass-flow gas meter.
Claims (4)
1. one kind low flow velocity wide-range mass-flow gas meter, be provided with table body and sensor base, the table body is one section conduit, the two ends of conduit are respectively equipped with flange, the tube wall that it is characterized in that conduit is provided with the metering through hole perpendicular to the conduit axis, be provided with gauge line in the metering through hole, be provided with division board in the gauge line, gauge line is divided into two independently passages in the division board, the gauge line lower end closed, the tube wall of the bottom of gauge line is provided with two fluid through-holes that are connected with two autonomous channels respectively, and the gauge line upper end is provided with lower flange, and sensor base is provided with central through hole, the sensor base lower end is provided with upper flange, upper flange is provided with the through hole that gauge line is installed, and is provided with sensor in the sensor base through hole, and upper flange is connected with lower flange.
2. a kind of low flow velocity wide-range mass-flow gas meter according to claim 1 is characterized in that lower flange is connected with the tube wall of conduit through spider.
3. a kind of low flow velocity wide-range mass-flow gas meter according to claim 1 is characterized in that the tube wall of a passage of gauge line is provided with at least two fluid through-holes.
4. a kind of low flow velocity wide-range mass-flow gas meter according to claim 1 is characterized in that sensor is located at the bottom of sensor base through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105728483A CN102095460A (en) | 2010-12-05 | 2010-12-05 | Low-velocity wide-range gas mass flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105728483A CN102095460A (en) | 2010-12-05 | 2010-12-05 | Low-velocity wide-range gas mass flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102095460A true CN102095460A (en) | 2011-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105728483A Pending CN102095460A (en) | 2010-12-05 | 2010-12-05 | Low-velocity wide-range gas mass flowmeter |
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| CN (1) | CN102095460A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674129A (en) * | 2013-09-09 | 2014-03-26 | 山西潞安环保能源开发股份有限公司 | Gas drainage pipeline flow measuring device |
| CN113670394A (en) * | 2021-08-12 | 2021-11-19 | 河北工大科雅能源科技股份有限公司 | Metering management and control device for wide-range self-adjusting instrument parameters |
-
2010
- 2010-12-05 CN CN2010105728483A patent/CN102095460A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674129A (en) * | 2013-09-09 | 2014-03-26 | 山西潞安环保能源开发股份有限公司 | Gas drainage pipeline flow measuring device |
| CN113670394A (en) * | 2021-08-12 | 2021-11-19 | 河北工大科雅能源科技股份有限公司 | Metering management and control device for wide-range self-adjusting instrument parameters |
| CN113670394B (en) * | 2021-08-12 | 2023-07-28 | 河北工大科雅能源科技股份有限公司 | Metering control device for wide-range self-adjusting instrument parameters |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110615 |