CN2462357Y - Gas flowmeter - Google Patents
Gas flowmeter Download PDFInfo
- Publication number
- CN2462357Y CN2462357Y CN 00249373 CN00249373U CN2462357Y CN 2462357 Y CN2462357 Y CN 2462357Y CN 00249373 CN00249373 CN 00249373 CN 00249373 U CN00249373 U CN 00249373U CN 2462357 Y CN2462357 Y CN 2462357Y
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- CN
- China
- Prior art keywords
- gas
- impeller
- valve
- flow meter
- gas flow
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a gas flow meter, which comprises a meter body, a meter cover, impellers and a counting display. A valve device is arranged between an air inlet of the meter body and an upper air chamber provided with the impellers; the just front side of an outlet of the valve is provided with a gas shunting passage. Through the rational design of the valve device and the gas shunting passage, the flow speed of gas is quickened when small flow; the increased amplitude of the gas flow rate is decelerated when large flow. The utility model has the advantages of wide metering range, high metering precision, good stability, long service life, etc., and is suitable for metering the flow of dry type gas such as industrial or domestic gas, natural gas, air, etc.
Description
The utility model relates to a kind of flowmeter, specifically about a kind of measurement of gas flow instrument.The utility model is applicable to the flow metering of dry type gases such as coal gas, natural gas, air.
The structural shape of existing measurement of gas flow device is a lot, porose board-like, vane type, eddy currents or the like, the gas flow meter that these structural shapes constituted, its range ratio is all less, measures range is narrower, so can not be applicable to the very big occasions of fluctuations in discharge scope such as family gas, rock gas.Existing gas measurement instrument, employing be the membrane type structure, utilize the contraction of leather bag under gas pressure changes to promote gearing, thereby drive rolling counters forward, reach the purpose of metering.This gas meter is because leather bag is tired easily, uses precise decreasing after a period of time, and fragile, the metering poor reliability.The disclosed patent No. of Patent Office of the People's Republic of China is 96225001.5 vane type domestic gas meter, the split channel that adopts several nozzles to form, spray the promotion impeller by main burner during low discharge, open diverting valve during big flow, several conical nozzles of outer air chamber spray coal gas, with the common drive impeller of main burner.This vane type domestic gas meter flow when the diverting valve opening and closing can produce sudden change, and its quantification stability is poor, precision is low, the enforcement so this patented technology fails to achieve success.At above problem, it is 98245096.6 gas-flow scale that our company has developed a kind of patent No., this gas-flow scale is provided with valve gear in the import of table body with the upper chamber joint that impeller is installed, utilize valve gear to regulate aperture automatically because of the variation of gas flow, make impeller when low discharge, improve sensitivity, slow down rotating speed during big flow and increase amplitude, it is big to have range ratio, advantages of simple structure and simple.But this gas-flow scale is under heavy traffic condition, and the rotating speed of its impeller is still very fast, and the wearing and tearing of impeller shaft are quite big, has influenced measuring accuracy and the quantification stability and the serviceable life of instrument.Therefore the patented product is not effectively implemented yet.
The purpose of this utility model is the problem that exists at prior art, provides a kind of and has both had that measures range is wide, range ratio is big, has the measuring accuracy height again, the gas flow meter of good stability, long service life.
The technical solution of the utility model comprises the table body, the table lid, impeller, impeller cover, air flow controller, counting display device and seal and fabricated section, be shaped on air intake opening on the table body, gas outlet and upper chamber, lower chamber, air intake opening communicates with upper chamber, the gas outlet communicates with lower chamber, impeller is installed in the upper chamber by impeller shaft, air flow controller is one to regulate the valve gear of aperture voluntarily, this valve gear is between air intake opening and the upper chamber, its gordian technique is to be provided with the gas split channel in outlet the place ahead of valve gear, and this gas split channel communicates with the gas outlet.
The utility model beneficial effect compared with prior art is in outlet the place ahead of valve the gas split channel to be set, by appropriate design to valve and gas split channel structure, low-angle is opened valve during low discharge, increase gas flow rate fast, the drive impeller rotation, improved meter sensitivity, when flow increases, the opening angle of valve increases thereupon, the gas split channel in the place ahead of valve outlet simultaneously also increases by a certain percentage to the shunt volume of gas, slow down the increasing degree that acts on gas flow rate on the impeller, thereby in same flow range, reduced the range of speeds of impeller.The action sensitivity of impeller and measuring accuracy when having improved low discharge, the increasing degree of wheel speed when reducing big flow is avoided influencing metering instrument precision and quantification stability and product serviceable life because of the impeller shaft wearing and tearing.Both had that range ratio is big, measures range is wide, its range ratio reaches 160, has advantages such as measuring accuracy height, good stability, long service life again.
Fig. 1 is the structure cut-open view of the utility model embodiment.
Fig. 2 is the vertical view of raising among Fig. 1 behind the above structural member of impeller cover.
Now describe structure of the present utility model in conjunction with the accompanying drawings and embodiments in detail.
The utility model structure comprises table body 1, table covers 7, impeller 4, impeller cover 6, air flow controller, counting display device and seal and fabricated section, be shaped on air intake opening 3 on the table body 1, gas outlet 9 and upper chamber 5, lower chamber 2, air intake opening 3 communicates with upper chamber 5, gas outlet 9 communicates with lower chamber 2, impeller 4 is installed in the upper chamber 5 by impeller shaft 8, air flow controller is one to regulate the valve gear of aperture voluntarily, this valve gear is between air intake opening 3 and upper chamber 5, outlet the place ahead at valve gear is provided with gas split channel 15, and this gas split channel 15 communicates with the gas outlet.
Valve gear is made of valve seating 10, valve 11, locating shaft 12 and permanent magnet 13,14, as shown in Figure 2.Valve seating 10 is blocked the passage of 5 of air intake opening 3 and upper chambers, valve 11 is installed on the valve seating 10 by locating shaft 12, permanent magnet 13 is housed on valve 11, this permanent magnet 13 is on the same circumference in valve 11 switching processes with the permanent magnet of showing on the body 1 14, the polarity of two permanent magnets 13,14 is identical, the magnetic flux of choose reasonable two permanent magnets 13,14, valve 11 is just closed with valve seating 10 when making zero flow.Under closure state, leave between valve 11 and the valve seating 10 and meet the crack, make small-flow gas directly meet the crack drive impeller by this.
Gas split channel 15 is positioned at valve gear outlet dead ahead, and its cross section is an isosceles triangle, and the summit of this isoceles triangle shape is towards valve 11 opening end directions.Gas split channel 15 other ends communicate with the gas outlet, as shown in Figure 2.
The outer end, back is the pinnacle shape on the blade of impeller 4, as shown in Figure 2.The blade lateral surface is a workplace 16, between this workplace 16 and the longitudinal axis through impeller 4 summits an angle is arranged.Impeller 4 is installed in the upper chamber 5 by impeller shaft 8.Impeller 4 is sealed by impeller cover 6, and the reduction gear on impeller shaft 8 passes impeller cover 6 and is installed in impeller cover 6 is connected, and reduction gear is connected with counting display device, and seals by showing to cover 7.Reduction gear can adopt worm and gear to slow down, as shown in Figure 1.
In above embodiment, the rotating speed of impeller can, pass through the electromagnetic riveting machine signal dispensing device, be converted to electric impulse signal input counting display device with the electromagnetic riveting machine signal receiving trap, its electromagnetic riveting machine signal dispensing device rotates with impeller 4, and the electromagnetic riveting machine signal receiving trap is fixedly mounted on the impeller cover 6.
The rotating speed of impeller 4 can also be converted to electric impulse signal input counting display device by the photosignal sending and receiving apparatus.Its concrete structure scheme is for adorning a frequency modulated light plate that is shaped on light tank on impeller 8, in the both sides of frequency modulated light plate photosignal emitter and photosignal receiving trap are installed respectively, the output signal end of its photosignal receiving trap is connected with the input end of counting display device.
Counting display device can adopt electronic counting display, single-chip microcomputer or intellectual micro computer count display etc.
Claims (7)
1, a kind of gas flow meter, comprise table body (1), table lid (7), impeller (4), impeller cover (6), air flow controller, counting display device and seal and fabricated section, be shaped on air intake opening (3) on the table body (1), gas outlet (9) and upper chamber (5), lower chamber (2), air intake opening (3) is connected with upper chamber (5), gas outlet (9) communicates with lower chamber (2), impeller (4) is installed in the upper chamber (5) by impeller shaft (8), air flow controller is one to regulate the valve gear of aperture voluntarily, this valve gear is between air intake opening (3) and the upper chamber (5), it is characterized in that being provided with gas split channel (15) in outlet the place ahead of valve gear, this gas split channel (15) communicates with gas outlet (9).
2, gas flow meter according to claim 1, the cross sectional shape that it is characterized in that described gas split channel (15) is an isosceles triangle, the summit of this isoceles triangle shape is towards valve (11) opening end direction.
3, gas flow meter according to claim 1 and 2, it is characterized in that on the described impeller shaft (8) the electromagnetic riveting machine signal dispensing device being housed, impeller cover is equipped with the electromagnetic riveting machine signal receiving trap on (6), and the output signal of this electromagnetic riveting machine signal receiving trap terminates to the input end of counting display device.
4, gas flow meter according to claim 1 and 2, it is characterized in that adorning on the described impeller shaft (8) a frequency modulated light plate that is shaped on light tank, in frequency modulated light plate both sides photosignal emitter and photosignal receiving trap are housed respectively, the output signal end of its photosignal receiving trap is connected with the input end of counting display device.
5, gas flow meter according to claim 1 and 2 is characterized in that described valve (11) is equipped with the identical permanent magnet of polarity (13,14) respectively with the corresponding position of table body (1).
6, gas flow meter according to claim 3 is characterized in that described valve (11) is equipped with the identical permanent magnet of polarity (13,14) respectively with the corresponding position of table body (1).
7, gas flow meter according to claim 4 is characterized in that described valve (11) is equipped with the identical permanent magnet of polarity (13,14) respectively with the corresponding position of table body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00249373 CN2462357Y (en) | 2000-09-20 | 2000-09-20 | Gas flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00249373 CN2462357Y (en) | 2000-09-20 | 2000-09-20 | Gas flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2462357Y true CN2462357Y (en) | 2001-11-28 |
Family
ID=33607828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00249373 Expired - Lifetime CN2462357Y (en) | 2000-09-20 | 2000-09-20 | Gas flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2462357Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011029261A1 (en) * | 2009-09-09 | 2011-03-17 | 南京西奥仪表测控有限公司 | Intelligent control turbine flowmeter |
| CN104089661A (en) * | 2014-07-14 | 2014-10-08 | 重庆邮电大学 | Air flow meter |
| CN105773439A (en) * | 2016-04-12 | 2016-07-20 | 胡和萍 | Airflow controller of mobile sand blasting machine |
| CN106323389A (en) * | 2016-10-28 | 2017-01-11 | 超达阀门集团丽水有限公司 | Impeller type gas flow metering device |
| CN114661072A (en) * | 2022-03-25 | 2022-06-24 | 安徽皖控自动化仪表有限公司 | Automatic control flow rate metering method and flow limiting mechanism thereof |
-
2000
- 2000-09-20 CN CN 00249373 patent/CN2462357Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011029261A1 (en) * | 2009-09-09 | 2011-03-17 | 南京西奥仪表测控有限公司 | Intelligent control turbine flowmeter |
| CN104089661A (en) * | 2014-07-14 | 2014-10-08 | 重庆邮电大学 | Air flow meter |
| CN105773439A (en) * | 2016-04-12 | 2016-07-20 | 胡和萍 | Airflow controller of mobile sand blasting machine |
| CN106323389A (en) * | 2016-10-28 | 2017-01-11 | 超达阀门集团丽水有限公司 | Impeller type gas flow metering device |
| CN114661072A (en) * | 2022-03-25 | 2022-06-24 | 安徽皖控自动化仪表有限公司 | Automatic control flow rate metering method and flow limiting mechanism thereof |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20100920 Granted publication date: 20011128 |