CN1080400A - Device for measuring flow speed of gas - Google Patents
Device for measuring flow speed of gas Download PDFInfo
- Publication number
- CN1080400A CN1080400A CN 92115088 CN92115088A CN1080400A CN 1080400 A CN1080400 A CN 1080400A CN 92115088 CN92115088 CN 92115088 CN 92115088 A CN92115088 A CN 92115088A CN 1080400 A CN1080400 A CN 1080400A
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- gas
- measurement plate
- velocity measurement
- connecting rod
- measuring
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Abstract
The present invention is a kind of device for measuring flow speed of gas.In the past, big caliber device for measuring flow speed of gas adopts the differential pressure measurement method more in the commercial production, and when flow velocity was low, pressure difference signal was little, and measuring accuracy is low, and measuring channel is easily stopped up by smokeshade.This device adopts novel velocity measurement plate, and does not adopt pressure differential method to measure, thereby has avoided the shortcoming of original technology.
Description
The present invention relates to a kind of fluid speed measuring device, particularly a kind of device for measuring flow speed of gas that is applicable to the online detection of industrial big caliber gas flow rate.
At present, in commercial production, the device that is used to measure big caliber gas flow rate has dual oviduct, wing pitot tube, even speed tube or the like.These devices are to adopt the method for measuring pressure reduction to come measurement flow rate mostly, and when the survey gas flow rate was low, the output pressure difference signal was little, and measuring accuracy is lower.In addition, this method is had relatively high expectations to the gas cleanliness, and when measuring flue gas, the measuring tube appearance of a street is easily stopped up by the dust particle in the flue gas, thereby influences normal online detection metering.
The purpose of this invention is to provide a kind of measuring accuracy height, and the gas cleanliness are required lower big caliber device for measuring flow speed of gas.
Above-mentioned purpose is to be realized by following technical scheme: in a pipe, it is airfoil type that a front portion is arranged, the rear portion is dull and stereotyped velocity measurement plate, in the both sides at velocity measurement plate middle part rotating shaft being housed respectively connects with the implementation activity of pipe two side, the velocity measurement plate afterbody links mutually with connecting rod, the connecting rod other end stretches out from the opening part on the pipe, links to each other with the dynamometry variator.
Said apparatus is installed in the tested horizontal pipe, mixes up the initial position of velocity measurement plate, and when gas stream is out-of-date, the wing template of velocity measurement plate front portion will produce lift, and the connecting rod that its rear portion is hinged will produce displacement, demonstrates reading from the dynamometry converter again.The lift that velocity measurement plate produced is determined by following formula:
F＝K·/2·Sv
2
In the formula: the lift that the F-velocity measurement plate obtains;
The density of-tested gas;
The S-velocity measurement plate produces the useful area of lift;
The flow velocity of the tested gas of v-;
The K-proportionality constant, with position of the fulcrum, the initial angle of attack of velocity measurement plate is relevant.
Following formula as seen, velocity measurement plate and gas flow rate square and the useful area of velocity measurement plate be directly proportional, and relevant with the fulcrum and the angle of attack of velocity measurement plate, as long as increase the useful area of velocity measurement plate, select the rational bearing position and the angle of attack, can obtain the bigger lift and the sensitivity of measurement.Thereby it is low to have overcome existing measuring technique measuring accuracy, the susceptible to plugging shortcoming of measuring channel.
Introduce a kind of embodiment below in conjunction with accompanying drawing.
Fig. 1 is the main pseudosection of present embodiment.
Fig. 2 is the top plan view of present embodiment.
Fig. 3 is the left view of present embodiment.
As shown in the figure, this measurement mechanism is as overcoat by the smooth steel pipe (1) of one section inside and outside wall, in pipe (1), adorn the velocity measurement plate (2) that a stainless steel is made, the longitudinal profile of velocity measurement plate (2) first half is " airfoil type ", latter half of is dull and stereotyped, a bearing holder (housing, cover) (3) respectively is equipped with in middle both sides, bearing holder (housing, cover) has an axis hole on (3), a round recess is arranged at the axis hole bottom, in put a steel ball (4), in the both sides of steel pipe (1) along the diametrical position of steel pipe (1) xsect, open two concentric holes, be welded with nut (6) outside the hole, have a screw rod that matches with nut (6) to make little axle (7), screw in pipe (1) and penetrate axle sleeve (3) from nut (6), withstand on the steel ball (4), mix up the gap with the opening of screwdriver by little axle (7) outer end again, install set nut (5) again additional, velocity measurement plate (2) just can rotate around little (7) in steel pipe (1).Before the work, at first to adjust the balancing weight (8) of velocity measurement plate (1) back to pipe (1) horizontal positioned, make velocity measurement plate (2) occupy suitable position, promptly keep the suitable angle of attack, be connected in the connecting rod (12) of velocity measurement plate (2) afterbody again by adjustment, the reading that makes the dynamometry transmitter is zero.During work, pipe (1) is placed in the tested horizontal pipe, make the front portion of velocity measurement plate (2) relative with airflow direction, when gas stream out-of-date, the airfoil type part of flow measurement prelaminar part will produce lift, thereby to fulcrum is the on line generation moment of two little axles (7), makes the connecting rod (12) of afterbody produce displacement thus, drives the dynamometry transmitter again and demonstrates reading.
For easy for installation, connecting rod (12) also can directly not link to each other with the dynamometry transmitter, and connects the dynamometry transmitter by reverse mechanism.Promptly outside the opening on pipe (1), be provided with a break-in cover (11), in the commutator segment (14) that is rectangular in shape is arranged, the middle part of commutator segment (14), all there is together arbor hole (15) both sides, and round bead bear is all arranged in the axis hole of both sides, have through hole and are welded with nut (10) in break-in cover (11) both sides, inwardly respectively screw in a semiaxis (9) by nut (10), push up to carry out on the ball in the axis hole (15) of commutator segment (14) and flexibly connect.The two ends of commutator segment are hinged with connecting rod (12), (13) respectively or flexibly connect.Connecting rod (13) stretches out from the opening on the tested pipeline, connects the dynamometry transmitter.Two right-angle sides of commutator segment are uneven in length, connect connecting rod (13) one side be longer than another side, can the displacement signal of connecting rod (12) be amplified like this, thus the sensitivity that improves this device.
Claims (2)
1, the present invention relates to a kind of fluid speed measuring device, it is a kind of device for measuring flow speed of gas that is applicable to the online detection of big caliber gas flow rate in the commercial production, it is characterized in that, in a pipe (1), it is airfoil type that a front portion is arranged, the rear portion is dull and stereotyped velocity measurement plate (2), on pipe (1) two side, concentric rotating shafts (7) is housed respectively, and carry out flexible connection with the both sides, middle part of velocity measurement plate (2), velocity measurement plate (2) afterbody and connecting rod (12) are hinged, and link to each other with the dynamometry transmitter by connecting rod (12).
2, device for measuring flow speed of gas according to claim 1 is characterized in that, said connecting rod (12) also can link to each other with a commutator segment (14), is linked to each other with another connecting rod (13) by commutator segment (14) again, links to each other with the dynamometry converter again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92115088 CN1080400A (en) | 1992-12-29 | 1992-12-29 | Device for measuring flow speed of gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92115088 CN1080400A (en) | 1992-12-29 | 1992-12-29 | Device for measuring flow speed of gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1080400A true CN1080400A (en) | 1994-01-05 |
Family
ID=4947260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92115088 Pending CN1080400A (en) | 1992-12-29 | 1992-12-29 | Device for measuring flow speed of gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1080400A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110303887A (en) * | 2019-06-18 | 2019-10-08 | 武汉科技大学 | A kind of overspeed alarm device and automobile-used braking system |
-
1992
- 1992-12-29 CN CN 92115088 patent/CN1080400A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110303887A (en) * | 2019-06-18 | 2019-10-08 | 武汉科技大学 | A kind of overspeed alarm device and automobile-used braking system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |