CN2108927U - Differential pressure flow and velocity sensor - Google Patents
Differential pressure flow and velocity sensor Download PDFInfo
- Publication number
- CN2108927U CN2108927U CN 91233359 CN91233359U CN2108927U CN 2108927 U CN2108927 U CN 2108927U CN 91233359 CN91233359 CN 91233359 CN 91233359 U CN91233359 U CN 91233359U CN 2108927 U CN2108927 U CN 2108927U
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- China
- Prior art keywords
- pressure pipeline
- pipeline
- intubate
- differential pressure
- sensing device
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Abstract
The utility model provides a differential pressure sensing device used for measuring the flow velocity and the flow quantity of fluids which continuously pass the inner of a closed pipeline. Comprising a dual chamber flute intubation tube, a dynamic pressure pipeline, a steady pressure pipeline and a differential pressure transmitter, the utility model is characterized in that the cross section of the flute-shaped intubation tube presents a flat ovoid shape, a flow regulating valve is connected in series in the steady pressure pipeline, and a zeroing controlling valve is arranged between the steady pressure pipeline and the dynamic pressure pipeline. The utility model has the advantages of simple structure, convenient installation and maintenance, high precision, high stability and little fluid resistance, and the device is suitable for various fluid convey pipelines with different standards.
Description
The utility model relates to a kind of continuous flow velocity of closed conduct inner fluid and the device of flow, especially a kind of differential pressure type flow rate sensing device of passing through that be used to measure.
Be used at present measuring continuously and mainly contain orifice-plate type, venturi tubular type, turbine type and ultrasonic type flow velocity, flowmeter by the flow velocity of closed conduct inner fluid or the device of flow, the most volume of test transducing part of these measurement mechanisms is bigger, make complicated, installation and maintenance also bother, and measuring accuracy is not high, and the sensing less stable be the more important thing is because the resistance of convection cell is bigger, cause the fluid crushing to increase, expend lot of energy.Chinese patent CN87212304U is called that to disclose a kind of architectural feature in " streamlined section porous pitot tube flowmeter " be that the transversal section of two-chamber porous pitot tube is fusiform sensing device.Though this architectural feature has to a certain degree improvement for above-mentioned phenomenon, but it manufactures still complicated, processing request is higher, when particularly the pitot tube of streamlined transversal section places fluid, its preceding end resistance reduces and converges, collides upset flow field owing to the both sides a fluid stream at this in the rear end that is fine stern shape, and then produce self-excitation and form the recirculating zone, make the static pressure of being surveyed depart from, fluctuate, influence measuring accuracy and stability.
The purpose of this utility model provides a kind of simple in structure with regard to being to overcome above-mentioned weak point of the prior art, manufacturing and easy to use, and the little power consumption of fluid crushing is low, the differential pressure type flow rate sensing device of measuring accuracy height and good stability.
The purpose of this utility model can reach by the enforcement of following measures.Be at an xsect and be provided with two dynamic pressure cavity and static pressure chambeies of separating mutually in the flat avette flute shape intubate, they are connected with the static pressure pipeline with the dynamic pressure pipeline respectively.Throttling valve of serial connection is used for the fluctuation of fluid in the buffering pipe in the static pressure pipeline, also and connect an operation valve that is used for adjusting zero point, returns to zero immediately when causing zero point drift so that change in environmental baseline between dynamic pressure pipeline and static pressure pipeline.
The utility model also can obtain better effect by adopting following measures:
(1) when measuring fluid liquid, can settle the air collector of a band vent valve at the output terminal of dynamic pressure pipeline and static pressure pipeline respectively, be used for collecting and get rid of gas in the fluid, improve the degree of accuracy of test sensing.
(2) two-chamber flute shape intubate can be made of intubate seat, intubate capping and the metal garden pipe that is fixed on the X-shaped cramp bar on the intubate seat and embeds two band cecums in the cramp bar groove.This structure is convenient to make and assembling, and structural strength also increases to some extent.
(3) on metal garden pipe, offer the taper pressure tap of 4～10 even numbers, on metal garden pipe, offer the cylindricality pressure tap of 3～9 odd numbers as the static pressure chamber as dynamic pressure cavity.All pressure taps are that axis of symmetry is symmetrically distributed with the center line that the back tested pipeline is installed.
Accompanying drawing 1 is a mounting structure synoptic diagram of the present utility model.
Accompanying drawing 2 is transversal section cut-open views of two-chamber flute shape intubate in the utility model.
The utility model describes in further detail below in conjunction with embodiment and accompanying drawing.Both sides of fixing welding have the X-shaped metal support bar 2 of groove on intubate seat 1, embed the stainless steel garden pipe 3,4 of a band cecum in its groove respectively, be connected with intubate capping 9 with bolt on the intubate seat 1, constitute two-chamber flute shape intubate 5 thus, on garden pipe 3, have 6 taper pressure taps 6 as dynamic pressure cavity, have 5 cylindricality pressure taps 7 on the garden pipe 4 as the static pressure chamber, they are that axis of symmetry is symmetrically distributed with the center line that back tested pipeline 8 is installed all.Garden pipe 3 is connected with static pressure pipeline 11 with dynamic pressure pipeline 10 respectively by intubate capping 9 with 4, and its output terminal is equipped with the air collector 12,13 of a band vent valve respectively, by the one side respectively introduction pipe link to each other with differential pressure transmitter 14.Polyphone is installed a throttling valve 15 in static pressure pipeline 11, between dynamic pressure pipeline 10 and static pressure pipeline 11 and be connected with a solenoid valve 16 that is used for adjusting zero point.This device can be installed in flow velocity or the flow that is used to measure water in the aqueduct of various different sizes, becomes the information of sending by its sensing and can directly import on the secondary instrument and show, also can handle, control through computing machine.
The utility model has following significant advantage compared with prior art:
(1) simple in structure, installation and maintenance are convenient. Adopt the metal support bar to be embedded in the flute shape intubate of metal garden pipe, simple in structure, be easy to make assembling, to install, use and keep in repair all easily, service life is also longer.
(2) crushing is little, and it is low to consume energy. Adopt the intubate in flat avette cross section to reduce fluid resistance, avoided the generation of self-excitation, eddy current, the pressure head loss is reduced, its irrecoverable crushing only accounts for 2～15% of differential pressure, far below 40～80% of conventional orifice plate or turbine type.
(3) degree of accuracy height, stability is good. Owing to set up air collector, regularly exhaust has been eliminated in the fluid gas to the impact of pressure measurement, in addition the fluctuation of static pressure pipeline serial connection choke valve buffer fluid and and connect that control valve is carried out automatically, in time zeroing, the degree of accuracy of its test sensing is improved, and stability is better.
Claims (4)
1, a kind of differential pressure type flow rate sensing device, constituted by flute shape intubate, dynamic pressure pipeline, static pressure pipeline and differential pressure transmitter, the transversal section that it is characterized in that two-chamber flute shape intubate 5 is flat avette, be serially connected with a throttling valve 15 in the static pressure pipeline 11, between dynamic pressure pipeline 10 and static pressure pipeline 11, go back and be connected to the operation valve 16 of a zeroing usefulness.
2, differential pressure type flow rate sensing device according to claim 1 is characterized in that the output terminal of dynamic pressure pipeline 10 and static pressure pipeline 11 is connected to the air collector 12 and 13 of a band vent valve respectively.
3, differential pressure type flow rate sensing device according to claim 1 and 2 is characterized in that two-chamber flute shape intubate 5 is by intubate capping 9, intubate seat 1 and is fixed on the intubate seat 1 and the X-shaped cramp bar 2 that is embedded with the metal garden pipe 3,4 of two band cecums is constituted.
4, differential pressure type flow rate sensing device according to claim 3 is characterized in that managing the taper pressure tap 6 that has 4～10 even numbers on 3 as the metal garden of dynamic pressure cavity, has the cylindricality pressure tap 7 of 3～9 odd numbers on the metal garden pipe 4 as the static pressure chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91233359 CN2108927U (en) | 1991-12-29 | 1991-12-29 | Differential pressure flow and velocity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91233359 CN2108927U (en) | 1991-12-29 | 1991-12-29 | Differential pressure flow and velocity sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2108927U true CN2108927U (en) | 1992-07-01 |
Family
ID=4938216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91233359 Granted CN2108927U (en) | 1991-12-29 | 1991-12-29 | Differential pressure flow and velocity sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2108927U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893644A (en) * | 2010-06-23 | 2010-11-24 | 江西省智成测控技术研究所有限责任公司 | Extraction method and extraction device of static pressure of differential pressure type navigational speed measuring instrument |
| CN101253394B (en) * | 2005-07-14 | 2012-01-25 | 西斯泰克控制测量及工程股份有限公司 | Stamping probe |
| CN103399170A (en) * | 2013-08-16 | 2013-11-20 | 中煤科工集团重庆研究院 | Automatic reset differential pressure module and method for measuring wind speed and wind direction |
| CN103399171A (en) * | 2013-08-16 | 2013-11-20 | 中煤科工集团重庆研究院 | Detecting device and method for bi-directionally measuring wind speed and wind direction |
| CN106018876A (en) * | 2016-07-31 | 2016-10-12 | 江阴市嘉臣光电科技有限公司 | Intelligent flowing speed meter |
-
1991
- 1991-12-29 CN CN 91233359 patent/CN2108927U/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101253394B (en) * | 2005-07-14 | 2012-01-25 | 西斯泰克控制测量及工程股份有限公司 | Stamping probe |
| CN101893644A (en) * | 2010-06-23 | 2010-11-24 | 江西省智成测控技术研究所有限责任公司 | Extraction method and extraction device of static pressure of differential pressure type navigational speed measuring instrument |
| CN103399170A (en) * | 2013-08-16 | 2013-11-20 | 中煤科工集团重庆研究院 | Automatic reset differential pressure module and method for measuring wind speed and wind direction |
| CN103399171A (en) * | 2013-08-16 | 2013-11-20 | 中煤科工集团重庆研究院 | Detecting device and method for bi-directionally measuring wind speed and wind direction |
| CN106018876A (en) * | 2016-07-31 | 2016-10-12 | 江阴市嘉臣光电科技有限公司 | Intelligent flowing speed meter |
| CN106018876B (en) * | 2016-07-31 | 2019-12-10 | 江苏嘉臣环境科技有限公司 | Intelligent current meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |