CN205539047U - Pressure sensing formula open channel tachymeter - Google Patents
Pressure sensing formula open channel tachymeter Download PDFInfo
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- CN205539047U CN205539047U CN201620303611.8U CN201620303611U CN205539047U CN 205539047 U CN205539047 U CN 205539047U CN 201620303611 U CN201620303611 U CN 201620303611U CN 205539047 U CN205539047 U CN 205539047U
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- hollow
- cavity
- outlet pipe
- tachymeter
- hollow water
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Abstract
The utility model discloses a pressure sensing formula open channel tachymeter, the cavity of depositing the wire including cavity inlet tube, cavity outlet pipe, pressure sensor, inside hangs the circuit case of pole and control current surveying, the cavity inlet tube intersects vertically with the cavity outlet pipe, pressure sensor lie in in the middle of the inside side of cavity outlet pipe just to cavity inlet tube department, cavity hangs perpendicular setting of pole and vacates water piping connection department top in with at the cavity inlet tube, cavity hangs the circuit case that there is the control current surveying on pole upper portion. The utility model discloses the device is applicable to the sectional average flowing speed of open channel and measures, the device principle, simple structure, and convenient operation with low costs and easily carry, has avoided present most rivers tachymeters shortcoming with high costs, awkward, can be widely used in hydrologic monitoring and experiment measurement.
Description
Technical field
This utility model belongs to data acquisition equipment field, relates to a kind of current speed measuring device, particularly relates to a kind of pressure sensing
Formula open-channel flow tachymeter.
Background technology
The measurement of fluid velocity has very for the interaction mechanism between the characteristics of motion and the internal fluid granule of Study of Fluid
Important meaning.Current meter is the instrument measuring the water body water velocities such as river, lake and channel.Currently mainly there is machinery, move
Potential energy, electrical measurement and ultrasonic four types.It is divided into propeller type current meter, Pitot tube all to put flow velocity tachymeter, electromagnetic type flow velocity
Instrument, ultrasonic flow-velocity instrument for measuring and calculating.
Propeller type current meter is the type that current research and production is conventional, and measurement data is accurate, and performance is more stable, but actual measurement
During need manual operation cumbersome, be additionally inconvenient to carry.Owing to being rotation paddle structure, rotor is exposed outside, by high speed mud
Sandstone impacts, it is easy to impaired, and maintenance cost is high, in-convenience in use.When using Pitot tube velocity measurement, it is necessary to first by Pitot
Pipe and rubber tube in air eject, then the lower end of Pitot tube is put in current, but actually used during, bubble
Being difficult to get rid of totally, lower end once departs from the water surface, needs aerofluxus again after entering bubble.Current meter and ultrasonic flow-velocity on battery
Instrument for measuring and calculating use cost is higher, and higher to using environmental requirement, its restricted application.
At present, market is simple and convenient to operate in the urgent need to a kind of principle, uses simple novel current tachymeter.
Summary of the invention
In order to solve above-mentioned technical problem, the utility model proposes a kind of pressure sensing type open-channel flow tachymeter, utilize specific
In the case of corresponding relation between flow rate of water flow and its flowing pressure produced, cash out by the form of flow rate of water flow pressure.
By pressure transducer (i.e. varistor), the size of pressure is converted into the size of electric current in related circuit, finally realizes electricity consumption
The size of the size performance flow rate of water flow of stream, it is achieved measure the purpose of flow rate of water flow.
Above-mentioned technical problem of the present utility model is mainly addressed by following technical proposals:
A kind of pressure sensing type open-channel flow tachymeter, including: hollow water inlet pipe, hollow water outlet pipe, pressure transducer, inside
Deposit the hollow hanger bar of wire, control the circuit box of flow measurement；Described hollow water inlet pipe intersects vertically with hollow water outlet pipe；Described
Pressure transducer be positioned in the middle of the inner side of hollow water outlet pipe just to hollow water inlet pipe at；Described hollow hanger bar is vertically arranged
At hollow water inlet pipe and top, hollow water outlet pipe junction；The circuit box controlling flow measurement is arranged at described hollow hanger bar top；In described
Pressure transducer is connected by the wire within hovering peg with the flow measurement circuit in circuit box.
Described circuit box is provided with power supply, on and off switch, protective resistance R1, galvanometer A；Described power supply, galvanometer A,
Protective resistance R1, on and off switch be sequentially connected with, between described power supply and on and off switch connect pressure transducer.
Preferably, the outer surface of described hollow water inlet pipe outer surface, hollow water outlet tube outer surface and both junctions is all in streamlined.
Preferably, the top of described hollow hanger bar is provided with the fixing end for fixing this current tachymeter.
The beneficial effects of the utility model are: a kind of pressure sensing type open-channel flow Flow speed measurer is applicable to the section of open-channel flow
Mean flow rate is measured, and principle, simple in construction are easy to operate, low cost and being easy to carry about with one, it is to avoid current major part current
Tachymeter cost shortcoming high, awkward, can be widely used in hydrologic monitoring and experiment are measured.
Accompanying drawing explanation
Fig. 1: for structure diagram of the present utility model.
Fig. 2: for principle sketch of the present utility model.
Fig. 3: for flow measurement circuit diagram of the present utility model.
In figure, 1 hollow water inlet pipe；2 hollow water outlet pipes；3 pressure transducers；4 hollow hanger bar；5 circuit box；
6 fixing ends；7 on and off switch；8 wires.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described further.
Asking for an interview Fig. 1 and Fig. 2, this utility model be the technical scheme is that a kind of pressure sensing type open-channel flow tachymeter,
Including:
Hollow water inlet pipe 1, hollow water outlet pipe 2, pressure transducer 3, the hollow hanger bar 4 of internal storage wire, control flow measurement
Circuit box 5；Described hollow water inlet pipe 1 intersects vertically with hollow water outlet pipe 2；Described pressure transducer 3 is positioned at hollow
In the middle of the inner side of outlet pipe 2 (just to hollow water inlet pipe 1)；Described hollow hanger bar 4 is vertically set on hollow water inlet pipe
1 with place to the rear, top, hollow water outlet pipe 2 junction；The circuit box 5 controlling flow measurement is arranged at described hollow hanger bar 4 top；Described
Hollow hanger bar 4 internal have wire 8 to be connected with the flow measurement circuit in circuit box 5 by pressure transducer 3.
See Fig. 2, when current flow into from hollow water inlet pipe 1, by the resistance of the pressure transducer 3 of hollow water outlet pipe 2 side
Hinder effect so that current are therefrom vacated water pipe 2 both sides and flowed out, and now current are V from the speed that hollow water inlet pipe 1 flows to1, from
The speed that hollow water outlet pipe 2 flows out is V2, the current dynamic pressure size that pressure transducer 3 is subject to is equal to pressure transducer 3 to water
The pressure F of stream, can derive F and V by hydraulic formula1Between relation: F=PV1 2A, wherein P is the density of water body,
Units/kg/m3, A is the water inlet cross-sectional area of hollow water inlet pipe 1, unit m2, F is the pressure transducer 3 pressure to current,
Unit N, V1The water velocity of hollow water inlet pipe 1, unit m/s is flow to for water.
See Fig. 3, described circuit box has power supply, on and off switch 7, protective resistance R1, galvanometer A: the power supply told,
Galvanometer A, protective resistance R1, on and off switch 7 be sequentially connected with, between described power supply and on and off switch 7 connect pressure sensing
Device 3 (i.e. varistor R).
Described hollow water inlet pipe 1 is all fairing ace with hollow water outlet tube-surface 2 and surface, junction thereof.
The top of described hollow hanger bar 4 is provided with fixing end 6.
During use, tachymeter is put at a certain measuring point of open-channel flow section to be measured, make hollow water inlet pipe 1 be completely submerged in current
In, fluid inlet alignment water (flow) direction, turn on the power switch 7, now pressure transducer is by water flow pressure effect, its resistance
Value changes and will be finally stable near a certain value, and the all-in resistance of the flow measurement circuit in circuit box 5 changes and final the most therewith
Stable near a certain value, now ammeter A has one to stablize reading.
Supply voltage is U, and the resistance value of protective resistance is R1, according to current value (the i.e. reading of ammeter A in flow measurement circuit
I) relation and between the resistance R of pressure transducer: R=U/I R1, and pressure transducer is to water flow pressure F and pressure biography
The relation of sensor resistance R: F=KR (k is a certain coefficient relevant with pressure transducer self), and water inlet water velocity
V1Relation with F: F=PV1 2A, can be according to the flow rate of water flow measured by the reading reaction of ammeter.Final realization is measured bright
The purpose of canal section somewhere flow rate of water flow.
Concrete control realization of the present utility model is prior art, and this utility model only provides apparatus structure design technology project.
The above is most preferred embodiment of the present utility model, and this utility model not makees any pro forma restriction, every depends on
Any simple modification, equivalent variations and the modification made above example according to technical spirit of the present utility model, all still falls within this reality
With in novel protection domain.
Claims (4)
1. a pressure sensing type open-channel flow tachymeter, it is characterised in that including: hollow water inlet pipe (1), hollow water outlet pipe
(2), pressure transducer (3), the hollow hanger bar (4) of internal storage wire (8), the circuit box (5) of control flow measurement；Institute
State hollow water inlet pipe (1) to intersect vertically with hollow water outlet pipe (2)；Described pressure transducer (3) is positioned at hollow water outlet pipe (2)
Inner side in the middle of just to hollow water inlet pipe (1) place；Described hollow hanger bar (4) is vertically set on hollow water inlet pipe (1)
With hollow water outlet pipe (2) top, junction；The circuit box (5) controlling flow measurement is arranged at described hollow hanger bar (4) top；Described
Pressure transducer (3) is connected by the wire (8) of hollow hanger bar (4) inside with the flow measurement circuit in circuit box (5).
A kind of pressure sensing type open-channel flow tachymeter the most according to claim 1, it is characterised in that: described circuit box (5)
In have power supply, on and off switch (7), protective resistance R1, galvanometer A；Described power supply, galvanometer A, protective resistance R1, electricity
Source switch (7) is sequentially connected with, and connects pressure transducer (3) between described power supply and on and off switch (7).
A kind of pressure sensing type open-channel flow tachymeter the most according to claim 1 and 2, it is characterised in that: described hollow
The outer surface of water inlet pipe (1) outer surface, hollow water outlet pipe (2) outer surface and both junctions is all in streamlined.
A kind of pressure sensing type open-channel flow tachymeter the most according to claim 1 and 2, it is characterised in that: described hollow
The top of hanger bar (4) is provided with the fixing end (6) for fixing this current tachymeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620303611.8U CN205539047U (en) | 2016-04-12 | 2016-04-12 | Pressure sensing formula open channel tachymeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620303611.8U CN205539047U (en) | 2016-04-12 | 2016-04-12 | Pressure sensing formula open channel tachymeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205539047U true CN205539047U (en) | 2016-08-31 |
Family
ID=56791543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620303611.8U Expired - Fee Related CN205539047U (en) | 2016-04-12 | 2016-04-12 | Pressure sensing formula open channel tachymeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205539047U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114814282A (en) * | 2022-04-13 | 2022-07-29 | 武汉大学 | Velocity of flow perpendicular distribution measuring device |
-
2016
- 2016-04-12 CN CN201620303611.8U patent/CN205539047U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114814282A (en) * | 2022-04-13 | 2022-07-29 | 武汉大学 | Velocity of flow perpendicular distribution measuring device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20170412 |