CN110672186A - Method for reducing wall-hanging effect of commutator of flow device - Google Patents
Method for reducing wall-hanging effect of commutator of flow device Download PDFInfo
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- CN110672186A CN110672186A CN201910970444.0A CN201910970444A CN110672186A CN 110672186 A CN110672186 A CN 110672186A CN 201910970444 A CN201910970444 A CN 201910970444A CN 110672186 A CN110672186 A CN 110672186A
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- commutator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
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Abstract
The invention discloses a method for reducing the wall-hanging effect of a flow device commutator, relates to a method for reducing the wall-hanging effect of the flow device commutator for calibrating and verifying liquid flow, and belongs to the field of calibrating and verifying liquid flow. According to the invention, the super-hydrophobic and oleophobic coating is sprayed on the inner surface of the shell of the inlet side of the commutator, so that the surface energy of the wall surface is reduced, the contact angle between the fluid and the wall surface is increased, the characteristic of strong hydrophilicity and lipophilicity between the fluid and the original wall surface is replaced by the super-hydrophobic and oleophobic property, the surface tension and the adhesive force of the fluid on the inner wall surface of the commutator are reduced, the sliding speed of liquid beads is increased, the weighing waiting time is reduced, and the working efficiency of a flow standard device is improved; or the effective liquid collection amount in the same weighing waiting time is increased, and the system error caused by the wall hanging effect is reduced. The invention can make up the inherent defects of the traditional mass method and volume method liquid flow standard device and improve the working efficiency and accuracy of the flow standard device.
Description
Technical Field
The invention relates to a method for reducing the wall-hanging effect of a flow device commutator, in particular to a method for reducing the wall-hanging effect of the flow device commutator for calibrating and verifying liquid flow, belonging to the field of calibrating and verifying liquid flow.
Background
The commutator is an important component of mass method and volume method liquid flow standard device, and is used for changing flow direction of fluid medium, making the fluid flow into weighing apparatus (standard container) or bypass pipeline, and the commutator is also one of main uncertainty sources of flow standard device. At the end of a certain calibration process, the diverter will perform a swap out operation and the fluid is switched from the weighing container to the bypass line. The commutator shell is generally made of metal, and common liquids (water and oil) and metal are in a wetting relationship. After the commutator is replaced, the splashed fluid medium is attached to the commutator shell, and the downward flow of liquid beads is prevented or delayed by the adhesive force, which is called wall-hanging effect. If the weight of the liquid drops is larger than the adhesive force, the liquid drops can flow into the weighing container and can be weighed as effective mass, but the weighing waiting time is greatly increased, and the working efficiency of the standard device is influenced; if the weight of the liquid drops is smaller than the adhesive force, the liquid drops cannot flow into the weighing container, so that the effective mass is reduced, a system error is caused, and the condition of small flow is particularly obvious. Thus limiting the application of mass and volumetric liquid flow rate calibration devices to medium and high viscosity fluid media.
Disclosure of Invention
In order to solve the problems of accuracy and working efficiency of a flow device caused by the wall-hanging effect of a commutator, the invention discloses a method for reducing the wall-hanging effect of the commutator of the flow device, which aims to solve the technical problems that: the surface tension and the adhesive force of the fluid on the inner wall surface of the commutator can be reduced, and the accuracy and the working efficiency of the commutator wall-hanging effect on the flow device are further improved.
The purpose of the invention is realized by the following technical scheme.
The invention discloses a method for reducing the wall-mounted effect of a commutator of a flow device, which is characterized in that a super-hydrophobic and oleophobic coating is sprayed on the inner surface of a shell of a commutator incoming side, so that the surface energy of a wall surface is reduced, the contact angle between fluid and the wall surface is increased, the characteristic of strong hydrophilicity and lipophilicity between the fluid and the original wall surface is replaced by super-hydrophobic and oleophobic property, and the surface tension and the adhesive force of the fluid on the inner wall surface of the commutator are reduced.
Preferably, the super-hydrophobic oleophobic coating is used for enabling a fluid contact angle on the wall surface of the commutator to be larger than 90 degrees, and the super-hydrophobic oleophobic coating material comprises a fluorine/silicon material, a synthetic high molecular melt polymer and an organic-inorganic hybrid material.
The invention discloses a method for reducing the wall-mounted effect of a commutator of a flow device, wherein a super-hydrophobic and oleophobic coating is sprayed on the inner surface of a shell of a switching-in side of the commutator, so that the surface energy of the wall surface is reduced, the contact angle between fluid and the wall surface is increased, the characteristic of strong hydrophilicity and lipophilicity between the fluid and the original wall surface is replaced by super-hydrophobic and oleophobic property, the surface tension and the adhesive force of the fluid on the inner wall surface of the commutator are reduced, the falling speed of liquid beads is increased, the weighing waiting time is reduced, and the working efficiency of a flow standard device is; or the effective liquid collection amount in the same weighing waiting time is increased, and the system error caused by the wall hanging effect is reduced.
Has the advantages that:
the invention discloses a method for reducing the wall-mounted effect of a commutator of a flow device, wherein a super-hydrophobic oleophobic coating is sprayed on the inner surface of a shell of a side-in exchanger of the commutator, so that the original hydrophilicity and lipophilicity between fluid and a wall surface are changed into hydrophobicity and lipophilicity, the adhesion force of the wall surface to liquid beads is effectively reduced, the sliding speed of the liquid beads is increased, the weighing waiting time is reduced, and the working efficiency of a flow standard device is improved; or the effective liquid collection amount in the same weighing waiting time is increased, and the system error caused by the wall hanging effect is reduced.
Drawings
FIG. 1 is a schematic diagram of a method for reducing wall built-up effect of a commutator of the invention.
Wherein: 1-water inlet pipe, 2-nozzle, 3-exchange side, 4-hydrophobic and oleophobic coating, 5-exchange side, 6-baffle, 7-photoelectric switch.
Detailed Description
For a better understanding of the objects and advantages of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Example 1:
take an open commutator as an example. The commutator comprises a water inlet pipe 1, a nozzle 2, a changing-in side 3, a hydrophobic and oleophobic coating 4, a changing-out side 5, a baffle 6 and a photoelectric switch 7.
As shown in fig. 1, in the method for reducing the wall-hanging effect of the diverter of the flow device disclosed in this embodiment, fluid flows in through a water inlet pipe 1, when the diverter is in a switch-in state, the fluid enters a switch-in side 3 through a nozzle 2, the fluid enters a collection container, and a baffle 6 leaves a photoelectric switch 7; this calibration is ended, and the operation commutator gets into and trades out the state, and the fluid passes through nozzle 2 and gets into and trades out side 5, and baffle 6 shelters from photoelectric switch 7, and 3 inner walls in the side of trading in probably contact with the fluid wall and set up hydrophobic oleophobic coating 4, super hydrophobic oleophobic coating material is nanometer inorganic material. The original hydrophilicity and lipophilicity between the fluid and the wall surface are changed into hydrophobicity and lipophilicity, so that the adhesive force of the wall surface to the liquid beads is effectively reduced, the falling speed of the liquid beads is increased, the weighing waiting time is reduced, and the working efficiency of the flow standard device is improved; or the effective liquid collection amount in the same weighing waiting time is increased, and the system error caused by the wall hanging effect is reduced.
The traditional commutator changing side 3 is not provided with the hydrophobic and oleophobic coating 4, when fluid flows into the changing side 3 through the nozzle 2, part of the fluid is sprayed to the inner wall surface of the commutator shell, and due to the hydrophilic and oleophilic characteristics of the fluid and the shell wall surface, after the commutator is switched to the changing side 5, liquid beads sprayed to the shell wall surface cannot slide down in a short time, so that the amount of the liquid flowing into the collecting container is less than the actual outflow amount of the nozzle 2; through 3 internal face at the side of trading in spraying hydrophobic oleophobic coating 4, when the fluid flowed into the side of trading in through nozzle 2, the fluid will splash 4 surfaces on the coating, owing to be hydrophobic oleophobic characteristic between coating and the fluid, will impel the rapid landing of splash liquid pearl, shorten the latency that the fluid was collected greatly for the volume that flows into collection container more is close to the actual outflow of nozzle 2.
The above detailed description is intended to illustrate the objects, aspects and advantages of the present invention, and it should be understood that the above detailed description is only exemplary of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. A method for reducing the wall-hanging effect of a commutator of a flow device is characterized in that: the inner surface of the shell of the inlet side of the commutator is sprayed with the super-hydrophobic and oleophobic coating, so that the surface energy of the wall surface is reduced, the contact angle between the fluid and the wall surface is increased, the characteristic of strong lipophilicity between the fluid and the original wall surface is replaced by the super-hydrophobic and oleophobic property, and the surface tension and the adhesive force of the fluid on the inner wall surface of the commutator are reduced.
2. The method for reducing the wall built-up effect of the diverter of the flow device as claimed in claim 1, wherein: the super-hydrophobic oleophobic coating is used for enabling a fluid contact angle on the wall surface of the commutator to be larger than 90 degrees.
3. The method for reducing the wall built-up effect of the diverter of the flow device as claimed in claim 2, wherein: the super-hydrophobic oleophobic coating material comprises a fluorine/silicon material, a synthetic high molecular melt polymer and an organic-inorganic hybrid material.
4. A method of reducing the wall built-up effect of a diverter of a flow device according to claim 1, 2 or 3, wherein: the falling speed of the liquid beads is increased, the weighing waiting time is reduced, and the working efficiency of the flow standard device is improved; or the effective liquid collection amount in the same weighing waiting time is increased, and the system error caused by the wall hanging effect is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910970444.0A CN110672186A (en) | 2019-10-13 | 2019-10-13 | Method for reducing wall-hanging effect of commutator of flow device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910970444.0A CN110672186A (en) | 2019-10-13 | 2019-10-13 | Method for reducing wall-hanging effect of commutator of flow device |
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| CN110672186A true CN110672186A (en) | 2020-01-10 |
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| CN201910970444.0A Pending CN110672186A (en) | 2019-10-13 | 2019-10-13 | Method for reducing wall-hanging effect of commutator of flow device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1661249A (en) * | 2004-02-23 | 2005-08-31 | 日本电产株式会社 | Fluid dispensation method |
| CN106679740A (en) * | 2016-12-08 | 2017-05-17 | 中国石油集团工程设计有限责任公司 | Cavity wall gushing water collector and application |
| CN108267196A (en) * | 2016-12-30 | 2018-07-10 | 宁波瑞森仪器仪表有限公司 | Rotary body nozzle-type commutator |
| CN108266546A (en) * | 2017-12-29 | 2018-07-10 | 丹东意邦计量仪器仪表有限公司 | A kind of electric rotary-type fluid commutator |
| CN108593028A (en) * | 2018-06-20 | 2018-09-28 | 中国科学技术大学 | A kind of liquid discrete topology and device for measuring volumetric flow of fluid |
| CN110146141A (en) * | 2019-04-26 | 2019-08-20 | 浙江大学 | Improve the liquid detection device and method of socket type sample needle |
| US20200080880A1 (en) * | 2017-05-05 | 2020-03-12 | Brighton Technologies Llc | Method and device for measuring minute volume of liquid |
-
2019
- 2019-10-13 CN CN201910970444.0A patent/CN110672186A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1661249A (en) * | 2004-02-23 | 2005-08-31 | 日本电产株式会社 | Fluid dispensation method |
| CN106679740A (en) * | 2016-12-08 | 2017-05-17 | 中国石油集团工程设计有限责任公司 | Cavity wall gushing water collector and application |
| CN108267196A (en) * | 2016-12-30 | 2018-07-10 | 宁波瑞森仪器仪表有限公司 | Rotary body nozzle-type commutator |
| US20200080880A1 (en) * | 2017-05-05 | 2020-03-12 | Brighton Technologies Llc | Method and device for measuring minute volume of liquid |
| CN108266546A (en) * | 2017-12-29 | 2018-07-10 | 丹东意邦计量仪器仪表有限公司 | A kind of electric rotary-type fluid commutator |
| CN108593028A (en) * | 2018-06-20 | 2018-09-28 | 中国科学技术大学 | A kind of liquid discrete topology and device for measuring volumetric flow of fluid |
| CN110146141A (en) * | 2019-04-26 | 2019-08-20 | 浙江大学 | Improve the liquid detection device and method of socket type sample needle |
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Application publication date: 20200110 |