CN204944561U - A kind of low pressure loss surpasses accelerometer measuring device - Google Patents
A kind of low pressure loss surpasses accelerometer measuring device Download PDFInfo
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- CN204944561U CN204944561U CN201520603869.5U CN201520603869U CN204944561U CN 204944561 U CN204944561 U CN 204944561U CN 201520603869 U CN201520603869 U CN 201520603869U CN 204944561 U CN204944561 U CN 204944561U
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- venturi tube
- pressure loss
- low pressure
- measuring device
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Abstract
The utility model relates to a kind of flow measurement device, especially relate to a kind of low pressure loss and surpass accelerometer measuring device, it comprises a Venturi tube, it is characterized in that: this Venturi tube is plug-type outer class Venturi tube, in Venturi tube, be combined with a rectangular tubular generator, Venturi tube with rectangular tubular generator coordinate the pressure pipe that two axially vertical with it; The utility model structure precision that is unique, that solve low reynolds number fluid measurement is low, the narrow problem of range ability, solves the narrow problem of measuring accuracy and range ability under low pressure loss, solves the problem that replacing installed online by measurement instrument.
Description
Technical field
The utility model relates to a kind of flow measurement device, especially relates to a kind of low pressure loss and surpasses accelerometer measuring device.
Background technology
In present differential-pressure instrumentation field of flow measurement, mainly contain a kind of balance flow meter throttling element application number: CN201210559562, the applying date: 2012.12.21, open (bulletin) number: CN103048022A, application (patent right) people: Shanghai Huaqiang Fuluo Instruments Co., Ltd. and venturi shape multi-hole orifice flowmeter: application number: CN201210231520, the applying date: 2012.07.05, open (bulletin) number: CN102735293A, application (patent right) people: China Tianchen Engineering Co., Ltd; Tianjin Tianchen Energy Engineering Technology R&D Co., Ltd.; Utility model people: Li Xinlong, Xing Tao, Li Ye, Liu Zhiwei, Zhang Wei, Wang Luyi, the appearance of this two instrument is all the distribution modes changing throttle orifice based on orifice plate, thus structurally play adjustment flow field, thus improve measuring accuracy, solve the problem that measuring accuracy under the high reynolds number of flow field is not high, but in the use procedure on utility model border, when they are used in the flow field of high reynolds number, measuring accuracy improves, but the congenital problem of their self structure, result in the pressure loss larger.But when the fluid measurement of low reynolds number, precision and range ability cannot ensure.Simultaneously because the increase of the pressure loss, cause the increase of energy consumption.
Also do not overcome the device of above-mentioned defect at present.
Summary of the invention
The purpose of this utility model is the defect overcoming prior art, there is provided a kind of structure precision that is unique, that solve low reynolds number fluid measurement low, the narrow problem of range ability, solve the narrow problem of measuring accuracy and range ability under low pressure loss, solve a kind of low pressure loss that measurement instrument installs the problem of replacing online and surpass accelerometer measuring device.
The utility model realizes in the following way:
A kind of low pressure loss surpasses accelerometer measuring device, it comprises a Venturi tube, it is characterized in that: this Venturi tube is plug-type outer class Venturi tube, is combined with a rectangular tubular generator in Venturi tube, Venturi tube with rectangular tubular generator coordinate the pressure pipe that two axially vertical with it;
The afterbody of described outer class Venturi tube is the shape of the cone that spreads gradually;
The base angle of the cone of described outer class Venturi tube afterbody is α
1, drift angle is β
1, described α
1be 7.5 °, β
1it is 15 °;
The internal diameter of the pipeline of to be 1D, D the be outer class Venturi tube of the spacing between described two pressure pipes.
The utility model has following effect:
1) structure is unique: the device that the utility model provides it comprise a Venturi tube, it is characterized in that: this Venturi tube is plug-type outer class Venturi tube, in Venturi tube, be combined with a rectangular tubular generator, Venturi tube with rectangular tubular generator coordinate the pressure pipe that two axially vertical with it; By utility model fail to be sold at auction determine experimental study find when the fluid in flow field flow through low pressure loss surpass accelerometer measuring device time, a pressure differential is produced before and after it, there is certain funtcional relationship in this pressure differential and flow, low pressure loss surpassed by pressure pipe the differential pressure signal that accelerometer measuring device produces in flow field by two pressures to detect, be then converted into the flow in flow field, utility model border by funtcional relationship.
2) amplification of multiple signal make low pressure loss surpass accelerometer measuring device in the flow field of low reynolds number, measuring accuracy is high, range ability is wide: the meter that the utility model provides structurally has the function of triple amplification differential pressure signal.First, it is played in the flow field of the large pipeline low reynolds number effect that one is reduced circulation area of the structure of plug-type outer class Venturi tube, the flow field velocity flowing through outer class Venturi tube inside is accelerated, the quickening of speed makes the Reynolds number in flow field increase, this is that the first heavy signal amplifies, secondly, the afterbody of class Venturi tube outside, by changing α
1, β
1angle, form the shape of a cone spread gradually, when the fluid in flow field flows through the conical structure of external diffusion, because the physical action of external diffusion cone, a raw suction force along flow field direction can be produced, under the effect of this suction force, the flow field velocity in outer class Venturi tube is accelerated, the Reynolds number in flow field increases, and this is that the second heavy signal amplifies.Finally, outside inside class Venturi tube, a rectangular tubular generator is installed, due to the rectangular configuration of rectangular tubular generator, by regulating the wedge angle α of rectangular tubular generator
2, β
2be 5, α with height H
2be 45 °, β
2be 45 °, H=0.5DD refers to the internal diameter of the pipeline of outer class venturi, makes reducing of the middle part circulation area gradual change of rectangular tubular generator, along with reducing of circulation area, make the increase of flow field medium flow velocity, thus flow field Reynolds number is promoted, this is triple amplification of signal.After this triple signal amplifies, improve by the velocity of medium in flow field, thus improve the Reynolds number in flow field, along with the raising of flow field Reynolds number, the precision of measurement also just improves.On pressure taking structure, the distance that the spacing between pressure port remains on 1D has been accomplished at flow field velocity the fastest, and the local pressure that pressure is minimum, thus the span improving pressure differential, add the range ability of instrument; By the amplification of above-mentioned triple signal, and the choosing of pressure sensor location, utility model has showed the high precision of instrument measurement, wide-range.
3) plug-type structure can reduce the pressure loss measured and bring greatly, reduce power consumption, and can install by the present line of utility model, safeguard that installation is simple and easy: the meter that the utility model provides passes through Flange joint, then the axial centerline of measuring channel is placed in, because this plug-type mounting means can not cause a large amount of minimizings of circulation area on the xsect of whole pipeline, thus when fluid flow through low pressure loss surpass accelerometer measuring device time, the pressure loss of generation is smaller.The mounting means of the duct type instrument that plug-type structure is different from the past, the installation mainly welding of pipeline and the connection of flange bolt of duct type instrument in the past, the result that such connection brings is that the volume ratio of instrument is huger, mount and dismount cumbersome, and plug-in type double square flowmeter just solves the trouble of instrument installation and later maintenance, because structural formula is plug-type, so the volume of instrument is relatively little, installation and maintenance use more convenient.
4) meter that provides of the utility model is compared with the instrument on current market, solve the measuring accuracy problem of low reynolds number, make the measuring accuracy under low reynolds number rise to 0.3% by 0.5% and become possibility, also make the range ability under low reynolds number rise to 30:1 from 10:1.Simultaneously plug-type mounting means solve original instrument cannot the difficult problem changed of the existing on-bne repair of utility model.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the plug-type outer class venturi tube structure schematic diagram of the utility model;
Fig. 3 is the utility model rectangular tubular generator architecture schematic diagram.
Embodiment
A kind of low pressure loss surpasses accelerometer measuring device, it comprises a Venturi tube 1, as shown in Figure 1,2 and 3: this Venturi tube 1 is plug-type outer class Venturi tube, in Venturi tube 1, be combined with a rectangular tubular generator 2, Venturi tube 1 with rectangular tubular generator 2 coordinate the pressure pipe 3 and 4 that two axially vertical with it.
The afterbody of described outer class Venturi tube 1 is the shape of the cone that spreads gradually;
The base angle of the cone of described outer class Venturi tube 1 afterbody is α
1, drift angle is β
1, described α
1be 7.5 °, β
1it is 15 °;
The internal diameter of the pipeline of to be 1D, D the be outer class Venturi tube 1 of the spacing between described two pressure pipes 3 and 4.Spacing between described two pressure pipes 3 and 4 is 25.4mm;
Described rectangular tubular generator 2, as the angle of throat α of Fig. 2 voussoir
2be 4
5 ° ,spread angle β
2be 4
5 °.
Claims (4)
1. a low pressure loss surpasses accelerometer measuring device, it comprises a Venturi tube (1), it is characterized in that: this Venturi tube (1) is plug-type outer class Venturi tube, a rectangular tubular generator (2) is combined with, in Venturi tube (1) and rectangular tubular generator (2) above cooperation two and its axially vertical pressure pipe (3) and (4) in Venturi tube (1).
2. a kind of low pressure loss as claimed in claim 1 surpasses accelerometer measuring device, it is characterized in that: the afterbody of described outer class Venturi tube (1) is the shape of the cone that spreads gradually.
3. a kind of low pressure loss as claimed in claim 1 surpasses accelerometer measuring device, it is characterized in that: the base angle of the cone of described outer class Venturi tube (1) afterbody is α
1, drift angle is β
1, described α
1be 7.5 °, β
1it is 15 °.
4. a kind of low pressure loss as claimed in claim 1 surpasses accelerometer measuring device, it is characterized in that: the internal diameter of the pipeline of to be 1D, D the be outer class Venturi tube (1) of the spacing between described two pressure pipes (3) and (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520603869.5U CN204944561U (en) | 2015-08-12 | 2015-08-12 | A kind of low pressure loss surpasses accelerometer measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520603869.5U CN204944561U (en) | 2015-08-12 | 2015-08-12 | A kind of low pressure loss surpasses accelerometer measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204944561U true CN204944561U (en) | 2016-01-06 |
Family
ID=55011977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520603869.5U Expired - Fee Related CN204944561U (en) | 2015-08-12 | 2015-08-12 | A kind of low pressure loss surpasses accelerometer measuring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN204944561U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043467A (en) * | 2015-08-12 | 2015-11-11 | 银川融神威自动化仪表厂(有限公司) | Low-pressure-drop super acceleration gauge |
| CN107179105A (en) * | 2017-06-05 | 2017-09-19 | 神华集团有限责任公司 | Flow measurement device |
| CN113687098A (en) * | 2021-07-19 | 2021-11-23 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Differential pressure type powder pipe wind speed measuring device and method for coal electric unit |
-
2015
- 2015-08-12 CN CN201520603869.5U patent/CN204944561U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043467A (en) * | 2015-08-12 | 2015-11-11 | 银川融神威自动化仪表厂(有限公司) | Low-pressure-drop super acceleration gauge |
| CN107179105A (en) * | 2017-06-05 | 2017-09-19 | 神华集团有限责任公司 | Flow measurement device |
| CN113687098A (en) * | 2021-07-19 | 2021-11-23 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Differential pressure type powder pipe wind speed measuring device and method for coal electric unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 Termination date: 20210812 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |