CN2456137Y - High precision small flow gas meter - Google Patents
High precision small flow gas meter Download PDFInfo
- Publication number
- CN2456137Y CN2456137Y CN 00258151 CN00258151U CN2456137Y CN 2456137 Y CN2456137 Y CN 2456137Y CN 00258151 CN00258151 CN 00258151 CN 00258151 U CN00258151 U CN 00258151U CN 2456137 Y CN2456137 Y CN 2456137Y
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- CN
- China
- Prior art keywords
- gas
- flow
- flexible pipe
- utility
- rotary encoder
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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 - Fee Related
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Abstract
The utility model relates to a flow measurement instrument. The utility model comprises a main flow pipe which is provided with a gas inlet, a gas outlet and a high-precision pressure switch, wherein, the gas outlet is connected with a flexible pipe. The flexible pipe is connected with a pneumatic peristaltic pump which is driven by an electric motor. The gas outlet end of the pneumatic peristaltic pump is connected with a rotary encoder. The rotary encoder is connected with a computer through a numbered card. The utility model measures the flow capacity of the small flow gas in high precision and full automatic, saves the labor, realizes the metering automation of the small flow gas, and is widely suitable for the fields of petroleum engineering, petrifaction, chemical engineering, medicine, biologic pharmacy, etc.
Description
The utility model relates to a kind of flowrate measuring tool, particularly can accurately measure the surveying instrument of the flow of small-flow gas.
Small-flow gas mainly is meant the gas that flow velocity is low, flow is little, because its flow velocity is low, flow is little, can not drive common flowmeter.The measurement about small-flow gas mainly is the moving metering of armrest in the engineering at present, promptly use suspended body flowmeter measurement gas flow: gas flows to suspended body flowmeter by pipeline, be provided with foam in the suspended body flowmeter, go out the scale that foam flows through and calculate volume by the manual read, measure the time with stopwatch, calculate gas flow.The major defect of this method is that measuring accuracy is low, error is big, and it is time-consuming to take the people.
The novel purpose of this use is at above-mentioned defective, can high precision, the flow of all automatic measurement small-flow gas, save manually, and realize the robotization of small-flow gas flow metering.
The purpose of this utility model is achieved in that it comprises that one is provided with the main flow pipe of gas access, gas vent and high-precision pressure switch, described gas vent links to each other with a flexible pipe, described flexible pipe links to each other with a Pneumatic creeping pump by driven by motor, the outlet side of described Pneumatic creeping pump links to each other with rotary encoder, and described rotary encoder is connected with computing machine by numbered card.
The above-mentioned gas outlet can connect a threeway, and two endpiece of described threeway are connected with described high-precision pressure switch and described flexible pipe respectively.
When the utility model has small-flow gas to flow into when the gas access, the pressure of trace changes immediately by the perception of high-precision pressure switch in the main flow pipe, and generation electric signal control driven by motor Pneumatic creeping pump work, the volume that the Pneumatic creeping pump is extracted out is read by rotary encoder, goes out real-time gas flow by COMPUTER CALCULATION.Employing Pneumatic creeping pump extracting gases is respectively measured in real time and is accurately calculated by computing machine, just can realize the flow of high precision, all automatic measurement small-flow gas, saves manually, realizes the robotization of small-flow gas flow metering.
Below in conjunction with accompanying drawing the utility model is further described.
Accompanying drawing is the structural representation of a kind of embodiment of the utility model.
1 is the gas access in the accompanying drawing, 2 is main flow pipe, the gas vent 3 of present embodiment is connected with a threeway 4, high-precision pressure switch 5 and flexible pipe 6 are connected in two outlets of threeway 4 respectively, flexible pipe 6 links to each other with a Pneumatic creeping pump 8 that is driven by motor 7, the outlet side of Pneumatic creeping pump 8 links to each other with rotary encoder 9, and described rotary encoder 9 is connected with computing machine 10 by numbered card.
The utility model in use, the gas access 1 of main flow pipe 2 is connected in the gas circuit, when having small-flow gas to flow the micro-pressure reduction of generation in the main flow pipe 2, high-precision pressure switch 5 is experienced pressure immediately and is changed, present embodiment is when the force value of high-precision pressure switch 5 surpasses P=1.007 atmospheric pressure, high-precision pressure switch 5 provides an electric signal by opening Pneumatic creeping pump 8 exhausts that motor 7 drives, when the atmospheric pressure of pressure P=1.0, close Pneumatic creeping pump 8, rotary encoder 9 is measured the volume of the gas of Pneumatic creeping pump 8 extractions, accurately calculates the cumulative volume and the volumetric flow rate of gas by computing machine at last.Can read gas buildup volume and different flows constantly continuously by computer control of the present utility model.There is not stochastic error in whole metering process, has only systematic error, knows system error by demarcation, can calculate the degree of accuracy of measured value.Pneumatic creeping pump 8 of the present utility model is the flexible pipe peristaltic pump that is complementary with low discharge, and rotary encoder 9 is a high-precision encoder.The utility model is widely used in fields such as petroleum engineering, petrochemical complex, chemical engineering, medical treatment, bio-pharmaceuticals.
Claims (2)
1. high precision small-flow gas flowmeter, it is characterized in that it comprises that one is provided with the main flow pipe of gas access, gas vent and high-precision pressure switch, described gas vent links to each other with a flexible pipe, described flexible pipe links to each other with a Pneumatic creeping pump by driven by motor, the outlet side of described Pneumatic creeping pump links to each other with rotary encoder, and described rotary encoder is connected with computing machine by numbered card.
2. high precision small-flow gas flowmeter according to claim 1 is characterized in that described gas vent can connect a threeway, and two endpiece of described threeway are connected with described high-precision pressure switch and described flexible pipe respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00258151 CN2456137Y (en) | 2000-10-18 | 2000-10-18 | High precision small flow gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00258151 CN2456137Y (en) | 2000-10-18 | 2000-10-18 | High precision small flow gas meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2456137Y true CN2456137Y (en) | 2001-10-24 |
Family
ID=33614529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00258151 Expired - Fee Related CN2456137Y (en) | 2000-10-18 | 2000-10-18 | High precision small flow gas meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2456137Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319901A (en) * | 2019-07-02 | 2019-10-11 | 东莞市美迪格电子科技有限公司 | A kind of devices and methods therefor measuring nebulizer gas volume |
-
2000
- 2000-10-18 CN CN 00258151 patent/CN2456137Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319901A (en) * | 2019-07-02 | 2019-10-11 | 东莞市美迪格电子科技有限公司 | A kind of devices and methods therefor measuring nebulizer gas volume |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |