CN201440079U - Liquid turbine flowmeter - Google Patents
Liquid turbine flowmeter Download PDFInfo
- Publication number
- CN201440079U CN201440079U CN2009201616369U CN200920161636U CN201440079U CN 201440079 U CN201440079 U CN 201440079U CN 2009201616369 U CN2009201616369 U CN 2009201616369U CN 200920161636 U CN200920161636 U CN 200920161636U CN 201440079 U CN201440079 U CN 201440079U
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- flowmeter
- temperature
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- rectifier
- sensor
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Abstract
A liquid turbine flowmeter comprises a flowmeter body, a rectifier and a turbine flowmeter, wherein the flowmeter body is provided with a liquid inlet, a liquid outlet and a detector interface; the rectifier comprises a plurality of fine tubes arranged at the liquid inlet in the flowmeter body; and the turbine flowmeter comprises a turbine, a sensor and a flow totalizer and is fixedly arranged in the flowmeter body and is opposite to the liquid outlet of the rectifier, wherein the sensor is oppositely arranged with the detector interface; the flow totalizer comprises a flow operational unit, a temperature compensation unit, a display device and a power supply part and is arranged outside the detector interface and connected with the sensor, wherein the flow operational unit is used for receiving the pulse signal of the sensor and carrying out operational treatment; the temperature compensation unit is used for receiving the temperature signal of the sensor and compensating the variation caused by temperature on a real-time basis; the display device is connected with the flow totalizer and used for displaying the monitored or operated result data; and the power supply part is connected with the flow totalizer. The rectifier and the flowmeter body are integrated into an integrated structure with small volume and reliable performance; and the measurement accuracy is ensured through establishing the temperature compensation of different oil.
Description
Technical field
The utility model relates to a kind of liquid flowmeter, relates in particular to a kind of liquid turbine flowmeter.
Background technology
The flowmeter that petrochemical system is commonly used is mainly by volumeter and velocity flowmeter at present.
When volumeter is measured full-bodied fluid, has higher measuring accuracy.Its principle of work is the flow that will flow through in the pipeline, continuously measures with the metric space with orthobaric volume, according to the volumetric values of this orthobaric volume and the cumulative frequency of continuous coverage, obtains the integrated flux by this flowmeter.During volumeter measurement volumes flow, be not subjected to the influence of fluid density and viscosity, flow state and velocity distribution are not had specific (special) requirements.But the cleanliness factor of its convection cell is had relatively high expectations, because it is to measure flow with the metric space with standard volume, so volume ratio is huger, is not suitable for the liquid meter under the big flow.
Velocity flowmeter commonly used has turbo flow meter, vortex shedding flow meter, electromagnetic flowmeter, ultrasonic flow meter etc.Turbo flow meter is to utilize fluid to flow to promote the impeller rotation, and flow rate of fluid is directly proportional with the angular velocity of rotation of impeller, by measuring the angular velocity of rotation of impeller, just can obtain flow rate of fluid, thereby obtains flow in the pipeline.It has the advantages that volume is little, in light weight, range ratio is wide, conformability is strong.But existing turbo flow meter, rectification body and flowmeter split setting can not reach good steady flow result, and existing turbo flow meter do not take into full account the influence of objective factor, thereby flow metering is not accurate enough.
The utility model content
Technical problem to be solved in the utility model provides a kind of liquid turbine flowmeter, the mode that the change conventional rectifier is separated with flowmeter is with rectifier and the integrated structure of flowmeter bodies, and set up the model of temperature compensation of different oil products, improved the accuracy of flowmeter metering.
To achieve these goals, the utility model provides a kind of liquid turbine flowmeter, it is characterized in that, comprising:
Flowmeter bodies has liquid inlet, liquid outlet and pick-up interface;
Rectifier is arranged in the described flowmeter bodies, comprises many tubules, and described rectifier has fluid inlet end and liquid outlet end, and the fluid inlet end of described rectifier is positioned at the place, liquid inlet of described flowmeter bodies;
Turbo flow meter, it is interior and relative with described rectifier liquid outlet end to be fixedly installed on described flowmeter bodies, described turbo flow meter comprises turbine, sensor, and described sensor and described pick-up interface are oppositely arranged, and described sensor comprises pulse transducer and temperature sensor;
Flow integrator is arranged on the outer described detector interface of described flowmeter bodies and connects described sensor, the signal that receiving sensor is gathered, and described flow integrator comprises again:
The flow arithmetic element, the pulse signal union that receives described pulse transducer is handled;
Temperature compensation unit receives the temperature signal of described temperature sensor and real-Time Compensation because the temperature-induced variations amount;
Display device connects the result data that described flow integrator also shows the exclusive disjunction of monitoring;
Power supply connects described flow integrator.
Above-mentioned liquid turbine flowmeter, wherein, described temperature compensation unit comprises again: be used for directly monitoring the monitoring modular of described fluid temperature, and be used for temperature compensation module according to the temperature compensation of different liquids temperature volume factor real-time online.
Above-mentioned liquid turbine flowmeter, wherein, described flow integrator also comprises information transmission unit, described information transmission unit comprises pulse signal output end mouth, 4～20mA analog signal output mouth and RS-485 PORT COM again.
Above-mentioned liquid turbine flowmeter, wherein, described flow integrator is the little power consumption integrated chip of TMCS-90S-D type series.
Above-mentioned liquid turbine flowmeter, wherein, described flow integrator also comprises the multi-segment nonlinear amending unit, is used to revise the error of described turbo flow meter.
Above-mentioned liquid turbine flowmeter, wherein, the rotor of described turbine is provided with 6 helical blades, and blade tilt is 35 °, and the blade degree of overlapping is 1.1.
Above-mentioned liquid turbine flowmeter, wherein, many tubules of described rectifier setting are stainless-steel tube, its quantity is one of in 19,21,35 or 42.
Above-mentioned liquid turbine flowmeter, wherein, described power supply comprises built-in 3.6V lithium battery and external power supply DC12～24V transformer.
Above-mentioned liquid turbine flowmeter, wherein, the top of described flowmeter bodies is tiltedly installed with protective cover, and described flow integrator, described power supply are fixedly installed in the described protective cover, and described display device is arranged on the described protective cover.
Above-mentioned liquid turbine flowmeter, wherein, described flowmeter bodies is a cylindrical housings, and the two-port place is provided with outer link slot respectively, and described flowmeter bodies bottom is provided with leg, and the top is provided with handle.
Beneficial functional of the present utility model is: the utility model flowmeter adaptive temperature scope compares broad, be used for the metering of light-end products, the integrated structure of rectifier and flowmeter bodies, changed the mode that existing rectifier separates with flowmeter, compact conformation, dependable performance, volume is little, in light weight, uses very conveniently, has solved when carrying oil product under the complicated fluidised form the accurately problem of metering.Bulk temperature Changing Pattern by having taken into full account liquid and viscosity are to the influence factor of instrument coefficient, set up the model of temperature compensation of different oil products, determine temperature compensation coefficient and multi-segment nonlinear modification method, guaranteed the consistance and the accuracy of flowmeter metering.
Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.
Description of drawings
Fig. 1 is the utility model structural drawing;
Fig. 2 is the side view of Fig. 1;
Fig. 3 a is first kind of embodiment structural representation of rectifier;
Fig. 3 b is second kind of embodiment structural representation of rectifier;
Fig. 3 c is the third embodiment structural representation of rectifier;
Fig. 3 d is the 4th kind of embodiment structural representation of rectifier.
Wherein, Reference numeral
1 flowmeter bodies, 2 rectifiers
21 rectifier tubules, 3 big spacers
4 left side supportings, 5 major axis
Spacer 7 turbines before 6
Spacer in 71 turbo blades 8
9 intelligent integral-counting instruments, 10 pick-up interfaces
11 right supporting 12 bearing supports
13 bearings, 14 sensors
15 outer link slot 16 protective covers
17 displays, 18 legs
19 handles, 20 gauge outfit fixed covers
A liquid inlet B liquid outlet
Embodiment
Below in conjunction with accompanying drawing structural principle of the present utility model and principle of work are done concrete description:
See also Fig. 1, Fig. 2 structural drawing of the present utility model.
Embodiment of the present utility model as shown in the figure, the utility model discloses a kind of liquid turbine flowmeter, comprising: flowmeter bodies 1, rectifier 2, turbo flow meter, flow integrator 9, display device 17 and power supply.
As shown in Figure 1, flowmeter bodies 1 has liquid inlet A, liquid outlet B and detector interface 10; Rectifier 2 comprises the many tubules 21 that are arranged in the flowmeter bodies, and rectifier 2 has fluid inlet end and liquid outlet end, and the fluid inlet end of rectifier is positioned at the A place, liquid inlet of flowmeter bodies.Turbo flow meter is fixedly installed in the flowmeter bodies and with respect to rectifier liquid outlet end, turbo flow meter comprises turbine 7, sensor 14, and sensor 14 corresponding pick-up interfaces 10 are provided with, and sensor 14 comprises pulse transducer and temperature sensor again.Flow integrator 9, be arranged on the outer detector interface 10 of flowmeter bodies, and connection sensor 14, the signal that receiving sensor 14 is gathered, flow integrator 9 adopts the little power consumption integrated chip of TMCS-90S-D type series, comprise in this little power consumption integrated chip: flow arithmetic element, temperature compensation unit and multi-segment nonlinear amending unit, temperature compensation unit comprises again, be used for the monitoring modular of direct monitoring liquid temperature, and be used for temperature compensation module according to the temperature compensation of different liquids temperature volume factor real-time online.Display 17 connection traffic integrating instruments 9 are used to show the result data of the exclusive disjunction of monitoring.
The fixed form of turbine 7 is, with about support 4,11 inwalls that are fixed in flowmeter bodies 1 respectively by the bearing support 12 of multijaw, the two ends of one major axis 5 are individually fixed in left side supporting 4 and support on 11, turbine 7 is set on the major axis 5 by pair of bearings 13, spacer 8 in being provided with between the bearing of the left and right sides, spacer 6 before also being provided with between the front end of left bearing 13 and the left side supporting 4.
Also be provided with big spacer 3 on the flowmeter bodies inwall between rectifier 2 and the left side supporting 4.
Liquid is through many tubule rectifications of rectifier 2, and the bearing support through left side supporting 4 acts on the impeller uniformly again.
The flowmeter rotor portion adopts rolling structure, between turbine 7 and the major axis 5 rolling bearing 13 is set, when liquid promotes turbo blade 71 rotations, can drive the overcoat rotation of turbine 7 and rolling bearing 13, the ball of rolling bearing 13 also rotates, and the interior cover of rolling bearing 13 is static, thereby guarantees that major axis 5 does not rotate, and reaches the effect of friction.
When flow of liquid during, under the effect of rectifier baffle, obtain rectification and quicken through sensor.Because turbo blade and flow direction are angled, under the accelerating fluid effect, the impeller moment that rotates, behind overcome friction square and the fluid resistance square, turbine begins rotation, in the certain flow scope, secondary speed is directly proportional with fluid volume flow, impeller rotation cutting magnetic line, change the magnetic flux in the coil periodically, make the coil two ends induce the pulse signal that is directly proportional with fluid volume flow, this signal is sent into the flow arithmetic element of little power consumption integrated chip and is carried out calculation process after amplification, filtering, shaping, and is shown on the display 17.
Temperature compensation unit, the temperature signal of receiving sensor and real-Time Compensation are because the temperature-induced variations amount.The volume of fluid changes with variation of temperature, and in general, temperature raises, volumetric expansion.This attribute of fluid is called thermal expansivity, represents with coefficient of thermal expansion.Different fluid has different expansivitys.
The temperature sensor of turbo flow meter adopts high-precision Pt1000 thermopair, can accurately measure the temperature of carrying liquid.Can carry out (every interval 4s) temperature compensation continuously according to the temperature that records.
The fluid of pipe laying system oil transportation mainly contains three kinds of gasoline, jet fuel and diesel oil.When carrying different fluid, should adopt different volume-temperature coefficients.
For gasoline, when density was 0.710-0.730, the temperature volume factor was 0.00123-0.00115.Can average 0.00119 during calculating.
For jet fuel, when density was 0.775-0.790, the temperature volume factor was 0.00099-0.00095, can average 0.00097 during calculating.
For diesel oil, when density was 0.800-0.830, the temperature volume factor was 0.00089-0.00084.Can average 0.000865 during calculating.
With 20 ℃ is that benchmark converts computing formula: V
20=V
t[1-f (t-20)]
Below by example, calculate the volume change of different liquids when 1 ℃ of the every rising of temperature.
For diesel oil, when density was 0.83, the temperature volume factor was 0.00084,
When temperature raises 1 ℃ the time, volume change is 0.84 ‰, if 10 ℃ of temperature variation will cause 0.84% error in dipping.
For jet fuel, when density was 0.780, the temperature volume factor was 0.00098,
When temperature raises 1 ℃ the time, volume change is 0.981 ‰, if 10 ℃ of temperature variation will cause 0.981% error in dipping.
For gasoline, when density was 0.710, the temperature volume factor was 0.00123,
When temperature raises 1 ℃ the time, volume change is 1.232 ‰, if 10 ℃ of temperature variation will cause 1.232% error in dipping.
Can find out from result of calculation, when gasoline feed, temperature is very big to the influence of volume, when 10 ℃ of temperature variation, can cause 1.232% error in dipping, and the metering of general flowmeter accurately all can reach 0.5%, existing liquid turbine flowmeter, only from improving the precision of instrument, and do not consider that fluid to be measured variation of temperature thereby the measurement result that obtains are inaccurate, can not satisfy the requirement of metering handing-over.The purpose of the utility model temperature compensation be exactly will the actual measurement oil product flow value convert to can be for the flow value under the standard temperature condition (is benchmark with 20 ℃) of metering handing-over.Specifically, be exactly the built-in cubical expansivity of gasoline, jet fuel and diesel oil in little power consumption integrated chip, by the change-over switch that is provided with, can carry out temperature compensation when carrying different oil product.
Adopted the multi-segment nonlinear correction in little power consumption integrated chip that the utility model adopts, turbo flow meter belongs to velocity flowmeter, and in certain flow range, to certain fluid media (medium) viscosity, the anglec of rotation of turbine is directly proportional with the flow velocity of liquid.The pulsed frequency of turbo flow meter output is directly proportional with the flow by flowmeter, and its scale-up factor K is called the instrument coefficient of flowmeter, is formulated as K=f/qv.In the formula, f is the pulsed frequency of turbo flow meter, and qv is the flow by flowmeter.The utility model flow integrator carries out interpolation arithmetic to the instrument coefficient of non-calibrating point, to adopting different instrument coefficients under the different operating modes, has improved the accuracy of metering during computing.
Flow integrator also comprises information transmission unit, realizes information transfer capability, and information transmission unit comprises pulse signal output end mouth, 4～20mA analog signal output mouth and RS-485 PORT COM.
Power supply can adopt built-in 3.6V lithium battery or connect external power source by external power supply DC12～24V transformer.
As shown in Figure 1 and Figure 2; the top of flowmeter bodies 1 is tiltedly installed with protective cover 16; flow integrator is fixed on protective cover 16 and the pick-up interface 10 by gauge outfit fixed cover 20, and power supply is fixedly installed in the protective cover 16, and display device 17 is arranged on the protective cover 16.
Flowmeter bodies 1 is a cylindrical housings, the two-port place is provided with outer link slot 15 respectively, so that connect entering and export pipeline of fluid to be measured, when the pipeline that enters and export that is used to connect fluid to be measured is the spigot-and-socket system, only the outer link slot 15 at flowmeter bodies 1 two-port place need be connected a conversion bell and spigot joint respectively gets final product, the bottom of flowmeter bodies 1 is provided with leg 18, and the top is provided with handle 19.
Physical dimension of the present utility model (length * wide * height) mm:600 * 220 * 380
Weight kg:38
Bore mm:150
Rated pressure MPa:4.0.
See also Fig. 2, as shown in the figure, turbine 7 of the present utility model is made by the magnetic stainless steel material, and helical blade 71 is housed, and the number of blade is 6, and blade tilt is 35 °, and the blade degree of overlapping is 1.1.
Seeing also Fig. 3 a, Fig. 3 b, Fig. 3 c and Fig. 3 d is the different embodiment structural representations of the utility model rectifier.
The velocity distribution of turbo flow meter characteristic and pipeline system has very big relation, ensures that therefore the fluid that enters flowmeter has even velocity and distributes, and is an important prerequisite condition that improves metering accuracy.The rectifier that the liquid turbine flowmeter that the utility model provides is built-in is made up of many stainless steel tubules.
First kind of embodiment, adopting 35 stainless steel tubules is a branch of rectifier.
Second kind of embodiment, adopting 21 stainless steel tubules is a branch of rectifier.
The third embodiment, adopting 19 stainless steel tubules is a branch of rectifier.
The 4th kind of embodiment, adopting 42 stainless steel tubules is a branch of rectifier.
Wherein, be the best with the 4th kind of embodiment, the length of its rectification bundle is 100mm; The interior diameter d=16mm of rectification bundle tubule, rectifier outer diameter D=150mm.
In sum, the liquid turbine flowmeter that provides of the utility model has following characteristics:
(1) the integrated structure of rectifier and flowmeter bodies has changed the mode that existing rectifier separates with flowmeter, compact conformation, dependable performance, and volume is little, in light weight, uses very conveniently, has solved when carrying oil product under the complicated fluidised form the accurately problem of metering.
(2) rectifier inside is provided with tubulose rectification bundle, has eliminated interior velocity flow profile inequality of pipeline and the interior secondary flow of pipeline to the influence of flow measuring accuracy, has guaranteed the accuracy of metering.
(3) the flowmeter rotor portion adopts rolling structure, energy loss when having reduced the parts rotation, solve the problem of the parts galloping that the fluid power deficiency causes under the low flow rate condition, enlarged the range ability of flowmeter, helped guaranteeing the precision and the repeatability of measuring.
(4) bulk temperature Changing Pattern by having taken into full account liquid and viscosity are to the influence factor of instrument coefficient, set up the model of temperature compensation of different oil products, determine temperature compensation coefficient and multi-segment nonlinear modification method, guaranteed the consistance and the accuracy of flowmeter metering.
(5) intelligent flow-integrating instrument and temperature compensation unit can be according to different liquids temperature volume factors, and the temperature of carrying liquid can be directly monitored in the real-time online temperature compensation again.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (10)
1. a liquid turbine flowmeter is characterized in that, comprising:
Flowmeter bodies has liquid inlet, liquid outlet and pick-up interface;
Rectifier is arranged in the described flowmeter bodies, comprises many tubules, and described rectifier has fluid inlet end and liquid outlet end, and the fluid inlet end of described rectifier is positioned at the place, liquid inlet of described flowmeter bodies;
Turbo flow meter, it is interior and relative with described rectifier liquid outlet end to be fixedly installed on described flowmeter bodies, described turbo flow meter comprises turbine, sensor, and described sensor and described pick-up interface are oppositely arranged, and described sensor comprises pulse transducer and temperature sensor;
Flow integrator is arranged on the outer described detector interface of described flowmeter bodies and connects described sensor, the signal that receiving sensor is gathered, and described flow integrator comprises again:
The flow arithmetic element, the pulse signal union that receives described pulse transducer is handled;
Temperature compensation unit receives the temperature signal of described temperature sensor and real-Time Compensation because the temperature-induced variations amount;
Display device connects the result data that described flow integrator also shows the exclusive disjunction of monitoring;
Power supply connects described flow integrator.
2. liquid turbine flowmeter according to claim 1, it is characterized in that, described temperature compensation unit comprises again: be used for directly monitoring the monitoring modular of described fluid temperature, and be used for temperature compensation module according to the temperature compensation of different liquids temperature volume factor real-time online.
3. liquid turbine flowmeter according to claim 1, it is characterized in that, described flow integrator also comprises information transmission unit, and described information transmission unit comprises pulse signal output end mouth, 4～20mA analog signal output mouth and RS-485 PORT COM again.
4. liquid turbine flowmeter according to claim 1 is characterized in that, described flow integrator is the little power consumption integrated chip of TMCS-90S-D type series.
5. liquid turbine flowmeter according to claim 1 is characterized in that described flow integrator also comprises the multi-segment nonlinear amending unit, is used to revise the error of described turbo flow meter.
6. liquid turbine flowmeter according to claim 1 is characterized in that, the rotor of described turbine is provided with 6 helical blades, and blade tilt is 35 °, and the blade degree of overlapping is 1.1.
7. liquid turbine flowmeter according to claim 1 is characterized in that, many tubules of described rectifier setting are stainless-steel tube, and its quantity is one of in 19,21,35 or 42.
8. liquid turbine flowmeter according to claim 1 is characterized in that, described power supply comprises built-in 3.6V lithium battery and external power supply DC12～24V transformer.
9. liquid turbine flowmeter according to claim 1; it is characterized in that; the top of described flowmeter bodies is tiltedly installed with protective cover, and described flow integrator, described power supply are fixedly installed in the described protective cover, and described display device is arranged on the described protective cover.
10. liquid turbine flowmeter according to claim 1 is characterized in that, described flowmeter bodies is a cylindrical housings, and the two-port place is provided with outer link slot respectively, and described flowmeter bodies bottom is provided with leg, and the top is provided with handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201616369U CN201440079U (en) | 2009-02-10 | 2009-07-17 | Liquid turbine flowmeter |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920105367.4 | 2009-02-10 | ||
| CN2009201616369U CN201440079U (en) | 2009-02-10 | 2009-07-17 | Liquid turbine flowmeter |
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|---|---|
| CN201440079U true CN201440079U (en) | 2010-04-21 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201616369U Expired - Fee Related CN201440079U (en) | 2009-02-10 | 2009-07-17 | Liquid turbine flowmeter |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267545A (en) * | 2013-05-17 | 2013-08-28 | 杭州冠一流体技术有限公司 | Procession vortex flow meter |
| CN103987315A (en) * | 2011-10-17 | 2014-08-13 | 科斯梅德有限公司 | Antibacterial filter and turbine flowmeter for tests on respiratory functionality |
| CN107024248A (en) * | 2017-05-27 | 2017-08-08 | 南京保立隆包装机械有限公司 | Liquid turbine flowmeter with ceramic spacer |
| CN108040100A (en) * | 2017-12-05 | 2018-05-15 | 北京捷思锐科技股份有限公司 | A kind of monitoring and managing method and maintenance device of Aerial spraying operation |
| CN110522391A (en) * | 2019-07-23 | 2019-12-03 | 广东美的白色家电技术创新中心有限公司 | The respirator of dish-washing machine and dish-washing machine with it |
| CN110926559A (en) * | 2019-11-07 | 2020-03-27 | 芜湖秒算电子科技有限公司 | Adjustable flow integrating instrument |
| CN113899412A (en) * | 2020-06-19 | 2022-01-07 | 哈尔滨理工大学 | Turbine flowmeter |
| CN115790732A (en) * | 2022-12-06 | 2023-03-14 | 成都众柴科技有限公司 | PQT single-row integral type sensor and pulse output connection structure |
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2009
- 2009-07-17 CN CN2009201616369U patent/CN201440079U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103987315A (en) * | 2011-10-17 | 2014-08-13 | 科斯梅德有限公司 | Antibacterial filter and turbine flowmeter for tests on respiratory functionality |
| CN103987315B (en) * | 2011-10-17 | 2016-08-17 | 科斯梅德有限公司 | The antibacterial air filter of test and turbine flowmeter for respiratory function |
| CN103267545A (en) * | 2013-05-17 | 2013-08-28 | 杭州冠一流体技术有限公司 | Procession vortex flow meter |
| CN103267545B (en) * | 2013-05-17 | 2016-01-13 | 杭州冠一流体技术有限公司 | Precession spiral flowmeter |
| CN107024248A (en) * | 2017-05-27 | 2017-08-08 | 南京保立隆包装机械有限公司 | Liquid turbine flowmeter with ceramic spacer |
| CN108040100A (en) * | 2017-12-05 | 2018-05-15 | 北京捷思锐科技股份有限公司 | A kind of monitoring and managing method and maintenance device of Aerial spraying operation |
| CN110522391A (en) * | 2019-07-23 | 2019-12-03 | 广东美的白色家电技术创新中心有限公司 | The respirator of dish-washing machine and dish-washing machine with it |
| CN110926559A (en) * | 2019-11-07 | 2020-03-27 | 芜湖秒算电子科技有限公司 | Adjustable flow integrating instrument |
| CN113899412A (en) * | 2020-06-19 | 2022-01-07 | 哈尔滨理工大学 | Turbine flowmeter |
| CN115790732A (en) * | 2022-12-06 | 2023-03-14 | 成都众柴科技有限公司 | PQT single-row integral type sensor and pulse output connection structure |
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| 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: 20100421 Termination date: 20100717 |