CN201016765Y - Gas Roots type flow-meter - Google Patents
Gas Roots type flow-meter Download PDFInfo
- Publication number
- CN201016765Y CN201016765Y CNU2007200357724U CN200720035772U CN201016765Y CN 201016765 Y CN201016765 Y CN 201016765Y CN U2007200357724 U CNU2007200357724 U CN U2007200357724U CN 200720035772 U CN200720035772 U CN 200720035772U CN 201016765 Y CN201016765 Y CN 201016765Y
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- sensor
- roots type
- waist
- gas
- flow
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Abstract
The utility model relates to a gas roots type flow meter comprising a flow integrating meter, a shell, a flow sensor, a magneto-dependent sensor, a temperature sensor, a pressure sensor and a pair of waist wheels; the top surfaces of both sides of the waist wheels are separately equipped with two blow-down grooves in the axial direction and across the whole side. With the blow-down action of the four blow-down grooves equipped on the top surfaces of both sides of the waist wheel, the rate of waist wheel being blocked is reduced; the reliability and flexibility of the flow meter are increased and the service life is prolonged.
Description
Technical field
The utility model belongs to a kind of volumetric flow metering instrument---gas Roots type flowmeter.
Background technology
Gas Roots (claiming the waist wheel again) flowmeter is the high-precision gas flow-meter, is used for the gas gross of precision measurement flow through closed conduct.Be suitable for measuring rock gas, town gas, propane, nitrogen, industrial inertia gas etc.Since mid-term in last century, combustion gas is as one of the energy in city, and consumption increases sharply.Thing followed measurement problem is also outstanding day by day.The instrument of measuring combustion gas has deaphragm gas meter, gas turbine meter, gas Roots type flowmeter and ultrasonic flow meter.As the industrial table of termination charge metering, it is only having only Roots type flowmeter.Roots type flowmeter generally comprises flow integrator, housing, flow sensor, magneto-dependent sensor, temperature sensor, pressure transducer and rotor (waist wheel).The key component rotor one waist wheel of gas Roots type flowmeter, its end surface shape can be made up of different curves.The rotor that forms with internal and external cycloids has characteristics such as lifting surface area is big, staring torque is little, makes small-bore gauging table easily but the shortcoming that also exists, is promptly blocked by the foul in the gas easily, influences gas Roots type flowmeter operate as normal and measuring accuracy.
Summary of the invention
The purpose of this utility model be for overcome the deficiencies in the prior art provide a kind of be difficult for by the foul in the gas block, the gas Roots type flowmeter of reliable operation.
For achieving the above object, technical solution of the present utility model is: a kind of gas Roots type flowmeter, comprise flow integrator, housing, flow sensor, magneto-dependent sensor, temperature sensor, pressure transducer and a pair of waist wheel, it is characterized in that: the both sides top surface of described waist wheel runs through whole side symmetry vertically and respectively is provided with two blowdown grooves.
Because the side at waist wheel increases by four blowdown grooves, when having foul such as dust in the gas, in the waist wheel rotary course, fouls such as dust are scraped in the blowdown groove, therefore can reduce stuck probability, have improved reliability.
Below in conjunction with the drawings and specific embodiments the utility model is further specified.
Description of drawings
Fig. 1 is the schematic appearance of the utility model specific embodiment;
Fig. 2 is the utility model specific embodiment inner structure synoptic diagram;
Fig. 3 is waist wheel cross-sectional geometry synoptic diagram;
Fig. 4 is the inner structure synoptic diagram of temperature of the present utility model, pressure.
Embodiment
As Fig. 1, shown in 2, the gas Roots type flowmeter of the utility model specific embodiment still comprises flow integrator 1, housing 2, flow sensor 3, magneto-dependent sensor 4, temperature sensor 5, pressure transducer and a pair of waist wheel 6 (being rotor), waist wheel 6 is arranged in housing 2 inner chambers, housing 2 left sides, right two ends are respectively equipped with protecgulum 7 and bonnet 8 sealings, protecgulum 7 is provided with support 9, flow integrator 1 is fixed on the support 9, two side roof parts (being the tooth top part) the surface sections outline line geometric configuration of waist wheel 6 is made of epicycloid, waist (being the tooth root part) the surface sections outline line geometric configuration of waist wheel 6 is by hypocycloid, referring to Fig. 3.Run through whole side symmetry vertically at the both sides top surface of waist wheel 6 and respectively be provided with two blowdown grooves 10, blowdown groove 10 is preferably between waist is taken turns 6 °～18 ° of 6 transversal face length axis of symmetry both sides.For making flowmeter seem more compact structure, attractive in appearance on the whole, in addition, the volume of gas and temperature, pressure dependence are close, and therefore measuring gas must measure temperature and pressure simultaneously.Measure the position of the sensor of temperature and pressure, have on the pipeline of flowmeter front and back, also have to be contained on the flowmeter.Layout not only can strengthen the space that occupies like this, and measurement result can be subjected to the influence that external environment condition changes.More satisfactory way is as for Roots's flow sensor 3 inside the temperature and pressure sensor.For this reason, in the present embodiment, temperature sensor 5 and pressure transducer adopt embedding structure, are fixed on the protecgulum 7, and all sealing is arranged in the flow sensor 3, and only signal wire exposes, referring to Fig. 4.
Claims (3)
1. gas Roots type flowmeter, comprise flow integrator, housing, flow sensor, magneto-dependent sensor, temperature sensor, pressure transducer and a pair of waist wheel, it is characterized in that: the both sides top surface of described waist wheel runs through whole side symmetry vertically and respectively is provided with two blowdown grooves.
2. gas Roots type flowmeter according to claim 1 is characterized in that: described blowdown groove is between waist is taken turns 6 °～18 ° of transversal face length axis of symmetry both sides.
3. gas Roots type flowmeter according to claim 1 and 2 is characterized in that: described temperature sensor and pressure transducer all seal and are arranged in the flow sensor, and only signal wire exposes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200357724U CN201016765Y (en) | 2007-03-27 | 2007-03-27 | Gas Roots type flow-meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200357724U CN201016765Y (en) | 2007-03-27 | 2007-03-27 | Gas Roots type flow-meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201016765Y true CN201016765Y (en) | 2008-02-06 |
Family
ID=39057257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200357724U Expired - Fee Related CN201016765Y (en) | 2007-03-27 | 2007-03-27 | Gas Roots type flow-meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201016765Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108153937A (en) * | 2017-12-03 | 2018-06-12 | 长春黄金研究院 | The design of shape line and processing method of a kind of two blade profiles rotor profile |
| CN110672173A (en) * | 2019-10-09 | 2020-01-10 | 东台市竹林高科技材料有限公司 | Intelligent gas waist wheel flowmeter and use method thereof |
-
2007
- 2007-03-27 CN CNU2007200357724U patent/CN201016765Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108153937A (en) * | 2017-12-03 | 2018-06-12 | 长春黄金研究院 | The design of shape line and processing method of a kind of two blade profiles rotor profile |
| CN110672173A (en) * | 2019-10-09 | 2020-01-10 | 东台市竹林高科技材料有限公司 | Intelligent gas waist wheel flowmeter and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Effective date of registration: 20091111 Pledge (preservation): Pledge |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Effective date of registration: 20091111 Pledge (preservation): Pledge |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20120711 Granted publication date: 20080206 Pledgee: Bank of Wenzhou Limited by Share Ltd Ouhai branch Pledgor: Fuma Instrument Co., Ltd., Zhejiang Prov. Registration number: 2009330000639 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Gas roots type flow meter Effective date of registration: 20120711 Granted publication date: 20080206 Pledgee: Bank of Wenzhou Limited by Share Ltd Ouhai branch Pledgor: Fuma Instrument Co., Ltd., Zhejiang Prov. Registration number: 2012990000363 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20140421 Granted publication date: 20080206 Pledgee: Bank of Wenzhou Limited by Share Ltd Ouhai branch Pledgor: Fuma Instrument Co., Ltd., Zhejiang Prov. Registration number: 2012990000363 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080206 Termination date: 20160327 |