CN202008376U - Gas mass flow meter with low flow rate and wide measuring range - Google Patents
Gas mass flow meter with low flow rate and wide measuring range Download PDFInfo
- Publication number
- CN202008376U CN202008376U CN2010206414629U CN201020641462U CN202008376U CN 202008376 U CN202008376 U CN 202008376U CN 2010206414629 U CN2010206414629 U CN 2010206414629U CN 201020641462 U CN201020641462 U CN 201020641462U CN 202008376 U CN202008376 U CN 202008376U
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- gauge line
- sensor
- conduit
- sensor base
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Abstract
The utility model relates to the technical field of gas flow detection, in particular to a gas mass flow meter with low flow rate and wide measuring range. The gas mass flow meter is characterized in that a metering through hole vertical to the axis of a conduit is arranged on the wall of the conduit; a metering tube is arranged in the metering through hole; the metering tube is internally provided with a separation board; the separation board divides the metering tube into two independent channels; the lower end of the metering tube is sealed; two fluid through holes communicated with the two independent channels are arranged on the wall of the metering tube, which is positioned at the lower end of the metering tube; a lower flange is arranged at the upper end of the metering tube; a sensor base is provided with a center through hole; an upper flange is arranged at the lower end of the sensor base; through holes of the metering tube are arranged on the upper flange; a through hole of the sensor base is internally provided with a sensor; and the upper flange is connected with the lower flange. The gas mass flow meter has the advantages of simple structure, low cost, wide measuring range for flow measurement, high measuring accuracy, and the like.
Description
Technical field
The utility model 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 utility model proposes 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 at the deficiencies in the prior art.
The utility model 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.
The utility model lower flange is connected with the tube wall of conduit through support or spider, to increase the stability of gauge line.
The utility model 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.
The utility model sensor 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.
The utility model gas 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 in the utility model.
Fig. 3 is the another kind of structural representation of gauge line in the utility model.
Fig. 4 is a sensor profile synoptic diagram in the utility model.
Embodiment.
Below in conjunction with accompanying drawing the utility model 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 is characterised in that conduit 1 of the present utility model 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 utility model 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, the utility model sensor 8 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 utility model is to draw 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 utility model is to draw 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.
The utility model gas 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 the utility model 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.
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 |
|---|---|---|---|
| CN2010206414629U CN202008376U (en) | 2010-12-05 | 2010-12-05 | Gas mass flow meter with low flow rate and wide measuring range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206414629U CN202008376U (en) | 2010-12-05 | 2010-12-05 | Gas mass flow meter with low flow rate and wide measuring range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202008376U true CN202008376U (en) | 2011-10-12 |
Family
ID=44750036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206414629U Expired - Fee Related CN202008376U (en) | 2010-12-05 | 2010-12-05 | Gas mass flow meter with low flow rate and wide measuring range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202008376U (en) |
-
2010
- 2010-12-05 CN CN2010206414629U patent/CN202008376U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111012 Termination date: 20121205 |