CN209640374U - A kind of calibrating installation of Pitot tube current meter - Google Patents
A kind of calibrating installation of Pitot tube current meter Download PDFInfo
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- CN209640374U CN209640374U CN201920250760.6U CN201920250760U CN209640374U CN 209640374 U CN209640374 U CN 209640374U CN 201920250760 U CN201920250760 U CN 201920250760U CN 209640374 U CN209640374 U CN 209640374U
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- current meter
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Abstract
The utility model belongs to measurement technology mechanism and monitoring of environment systems technology field, is related to a kind of calibrating installation of Pitot tube current meter, and calibrating installation includes wind-tunnel, supplementary controlled system and the measurement workbench being adjusted for the position to Pitot tube current meter；The motor of wind-tunnel uses centrifugation frequency blower, and centrifugation frequency blower is connect with supplementary controlled system；When examining and determine Pitot tube current meter, Pitot tube current meter is installed on measurement workbench, and the control route of Pitot tube current meter is connect with supplementary controlled system；After Pitot tube current meter is installed on measurement workbench, the force samples mouth of Pitot tube current meter is located at the stabilization area of wind-tunnel air outlet, and the force samples mouth of Pitot tube current meter is vertical with wind-tunnel air outlet.The calibrating installation of the Pitot tube current meter of the utility model solve be currently used for current meter calibrating the closed construction of wind tunnel of closed-circuit wind tunnel-it is complicated, cost of manufacture is high, the influence factor that is subject to is more, complicated for operation, the problems such as taking up a large area.
Description
Technical field
The utility model belongs to measurement technology mechanism and monitoring of environment systems technology field, is related to a kind of Pitot tube current meter
Calibrating installation, the utility model can meet the instrument of a variety of differential pressure types such as Pitot tube, differential pressure transmitter, Pitot tube current meter
Or the calibrating of equipment.
Background technique
In today that environmental pollution constantly aggravates, people are look for various methods to control pollution or reduce pollution, Gu
Pollution sources are determined in addition to SO2、NOx, the parameters such as flue dust carry out outside real-time monitoring, it is also necessary to the flow velocity of flue gas, pressure, temperature etc.
Parameter is monitored, to be adjusted in time to boiler combustion situation and flue gas emission situation.It is arranged in China's stationary source
It puts pollutant and carries out concentration and overall control, discharge the flow velocity (flow) of flue gas, be the important parameter of the determining total amount of pollutant.
The method of flow monitoring is mainly Pitot tube differential pressure method and supercritical ultrasonics technology currently on the market, wherein Pitot tube differential pressure method
Because its is simple for structure, easy for installation, lower-price characteristic is in occupation of mainstream market；But it is domestic at present only to Pitot tube
The standard verification specification and method of coefficient, there are no the devices of the calibrating specifically for Pitot tube current meter or the standard of formulation to advise
Model and method.It is reported that the manufacturer of live Pitot tube current meter, mainly by closed loop closed-circuit wind tunnel, either
It is examined and determine by pressure generator.But being currently used for the closed wind-tunnel of closed-circuit wind tunnel-that current meter is examined and determine, there are structures to answer
It is miscellaneous, cost of manufacture is high, the influence factor that is subject to is more, complicated for operation, the problems such as taking up a large area.
Utility model content
To solve problems of the prior art, the purpose of this utility model is to provide for a kind of Pitot tube current meter
Calibrating installation, the calibrating installation can according to national metrological verification regulations, realize to coefficient of Pitot tube detection, current meter mark
Fixed/detection, differential pressure voice changer calibration/detection；Have the characteristics that area occupied is few, structurally reasonable, easy to operate.
The technical solution adopted in the utility model is as follows:
A kind of calibrating installation of Pitot tube current meter, including wind-tunnel, supplementary controlled system and for Pitot tube flow velocity
The measurement workbench that the position of instrument is adjusted；The motor of wind-tunnel uses centrifugation frequency blower, and centrifugation frequency blower and auxiliary are controlled
System connection processed；When examining and determine Pitot tube current meter, Pitot tube current meter is installed on measurement workbench, and Pitot tube flow velocity
The control route of instrument is connect with supplementary controlled system；After Pitot tube current meter is installed on measurement workbench, Pitot tube current meter
Force samples mouth is located at the stabilization area of wind-tunnel air outlet, and the force samples mouth of Pitot tube current meter is vertical with wind-tunnel air outlet.
Wind-tunnel further includes the inducer being sequentially coaxially arranged, contraction section, diffuser, stable section and jet pipe, centrifugation frequency
The entrance of the air outlet of blower and inducer connects, and the outlet of inducer and the entrance of contraction section connect, the outlet of contraction section with
The entrance of diffuser connects, and the outlet of diffuser and the entrance of stable section connect, and the outlet of stable section and the entrance of jet pipe connect,
The outlet of jet pipe is the outlet of entire wind-tunnel.
The outlet of contraction section and the inlet of diffuser are equipped with throttling set, and throttling set is provided with wind speed adjustable plate, wind
The circular vent coaxial with diffuser is offered on fast adjustable plate.
Wind speed adjusts board ends and is connected to air bag, and differential pressure gauge is respectively connected on air bag, and differential pressure gauge is used for defeated to flow velocity
Fine tuning compensation out.
The differential pressure gauge is compensate-type micropressure meter.
Stable section is provided with honeycomb rectifier.
Measuring workbench includes four-way lead screw module, measuring device supporting plate and measuring device support frame, measuring device supporting plate
It is installed in four-way lead screw module, four-way lead screw module can drive measuring device supporting plate to be moved to predeterminated position simultaneously in horizontal plane
It is fixed；Measuring device support frame is installed on measuring device supporting plate；When examining and determine Pitot tube current meter, Pitot tube current meter peace
Loaded on measuring device supporting plate, and it is supported by measuring device support frame.
Four-way lead screw module includes the straight direction guiding rail of hand-rail type and hand-rail type cross slide way, the straight direction guiding rail of hand-rail type and wind-tunnel axis
Line is vertical, and the straight direction guiding rail of hand-rail type and hand-rail type cross slide way include guide rail, lead screw and sliding block, and lead screw is set in guide rail,
Sliding block and threads of lead screw are cooperatively connected, and guide rail can be slider guide；It is straight that the guide rail of hand-rail type cross slide way is installed on hand-rail type
On the sliding block of direction guiding rail, measuring device supporting plate is installed on the sliding block of hand-rail type cross slide way.
It further include measurement Board for adjusting vision distance, measurement Board for adjusting vision distance is set to the outlet of wind-tunnel, for fixing the pressure of Pitot tube current meter
The force samples mouth of power thief hatch and instruction Pitot tube current meter is apart from the position that wind-tunnel exports.
The utility model has the following beneficial effects:
The calibrating installation of the utility model Pitot tube current meter is when examining and determine Pitot tube current meter, by Pitot tube current meter
It is installed on measurement workbench and the control route of Pitot tube current meter is connect with supplementary controlled system；Pitot tube current meter
After being installed on measurement workbench, workbench is measured by adjusting, the force samples mouth of Pitot tube current meter is made to be located at wind-tunnel outlet air
The stabilization area of mouth, the force samples mouth of Pitot tube current meter are vertical with wind-tunnel air outlet；By above structure it is found that the utility model
The calibrating installation of Pitot tube current meter make a kind of open calibrating installation, structure is simple, occupied area is small, therefore is fabricated to
This is relatively small；When to the calibrating of Pitot tube current meter, started using supplementary controlled system control centrifugation frequency blower, and with default
Frequency work makes the wind speed of hole air outlet reach preset value, and supplementary controlled system obtains the flow velocity output valve of Pitot tube current meter,
And the error analysis between the flow velocity output valve and preset flow value for passing through Pitot tube current meter is assessed by trustship flow velocity to be measured
The performance of instrument, thus it is easy to operate.The calibrating installation of the utility model can be according to national metrological verification regulations simultaneously, realization pair
Coefficient of Pitot tube detection, current meter calibration/detection, differential pressure voice changer calibration/detection.In conclusion the skin support of the utility model
The calibrating installation of pipe current meter solves the closed construction of wind tunnel complexity of closed-circuit wind tunnel-, the system for being currently used for current meter calibrating
Make that influence factor that is at high cost, being subject to is more, complicated for operation, the problems such as taking up a large area.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the calibrating installation of the utility model Pitot tube current meter.
In figure, 1- wind-tunnel cabinet, 2- centrifugation frequency blower, 3- wind-tunnel, 4- wind speed adjustable plate, 5- measures Board for adjusting vision distance, and 6- leads
Rail cabinet, the straight direction guiding rail of 7- hand-rail type, 8- hand-rail type cross slide way, 9- measuring device supporting plate, 10- measuring device, 11- measurement are set
Standby support frame, 12- workbench, 13- control computer, 14- frequency converter, 15- differential manometer.
Specific embodiment
With reference to embodiment and compares attached drawing the utility model is further described.
Each component models and embodiment introduction in the utility model embodiment:
Wind-tunnel cabinet 1: being the platform for placing centrifugation frequency blower 2 and wind-tunnel 3, and the bottom of wind-tunnel cabinet 1 is uniformly divided
Cloth 6 for adjusting 3 axis of wind-tunnel in horizontal Level tune support leg.
Centrifugation frequency blower 2: centrifugation frequency blower 2 is connected with component frequency converter 14, by the output for adjusting frequency converter 14
Frequency can control the rotation speed of fan of centrifugation frequency blower 2, to provide different size of wind speed for wind-tunnel 3, further make wind-tunnel 3
The wind speed of air outlet reaches preset value.
Wind-tunnel 3: material can be glass reinforced plastic, using the good advantage of its high-strength light, designability, simple process once at
Type.
Wind speed adjustable plate 4: being choke block, and aperture is variant, selects suitable orifice plate according to institute's velocity measurement range.
Measurement Board for adjusting vision distance 5: it is used to indicate from spout horizontal measurement position and installation standard pitot tube.
Guide rail cabinet 6: installation four-way lead screw module and measurement measuring device supporting plate.
The straight direction guiding rail 7 of hand-rail type: lead screw is controlled by rocking handle, drives equipment supporting plate vertically movable；
Hand-rail type cross slide way 8: lead screw is controlled by rocking handle, drives equipment supporting plate transverse shifting；
Measuring device supporting plate 9: for placing measuring device 10, measuring device supporting plate 9 is equipped with measuring device support frame 11,
To guarantee the calibration equipment i.e. longitudinal direction of Pitot tube current meter (i.e. the axial direction of the straight direction guiding rail 7 of hand-rail type shown in Fig. 1) position.
Measuring device 10: Pitot tube current meter i.e. to be examined and determine.
Measuring device support frame 11: offering length thereon is 150mm semi-circular recesses, and the diameter in semi-circular recesses is equal to
The outer diameter of Pitot tube on Pitot tube current meter；
Workbench 12: for placing control computer 13.
Control computer 13: for setting the flow velocity size of wind-tunnel outlet outflow fluid and reading the flow velocity of Pitot tube current meter
Output valve or measured value；
Frequency converter 14: it is worked for controlling centrifugation frequency blower 2 with predeterminated frequency.
Differential manometer 15: the positive and negative pressure mouth of differential manometer is connected to the air bag of 4 two sides of wind speed adjustable plate by rubber tube.
As shown in Figure 1, the calibrating installation of the Pitot tube current meter of the utility model, including wind-tunnel 3, supplementary controlled system with
And the measurement workbench being adjusted for the position to Pitot tube current meter, auxiliary system include qin formula console containing PC machine,
Balance vibration isolators, air gauge, thermometer, standard pitot tube, difference gauge；Wind-tunnel 3 includes centrifugation frequency blower 2 and wind tunnel
Body, wind tunnel body include the inducer being sequentially coaxially arranged, contraction section, diffuser, stable section and jet pipe, above-mentioned each functional section
It is in the same pipeline.The air outlet of centrifugation frequency blower 2 and the entrance of inducer connect, the outlet and contraction of inducer
The entrance connection of section, the outlet of contraction section and the entrance of diffuser connect, and the outlet of diffuser and the entrance of stable section connect, surely
The entrance of the outlet and jet pipe of determining section connects, and the outlet of jet pipe is the outlet of entire wind-tunnel, the outlet of contraction section and diffuser
Inlet is equipped with throttling set, and throttling set is provided with wind speed adjustable plate 4, offers on wind speed adjustable plate 4 coaxial with diffuser
Circular vent, 4 both ends of wind speed adjustable plate are connected to air bag, be respectively connected with differential pressure gauge on air bag, differential pressure gauge for pair
The fine tuning compensation of flow velocity output, differential pressure gauge is compensate-type micropressure meter, and stable section is provided with honeycomb rectifier, and honeycomb rectifier is
The stainless steel disk of core lattice size 6mm, core lattice length 100mm.Stable section is realized for the first time by primary rectifier plate and long sections of straight pipe
Rectify current stabilization.Centrifugation frequency blower 2 is centrifugal multiblade centrifugation frequency blower, in centrifugation frequency blower 2 and supplementary controlled system
Frequency converter 14 connects, and controls rotation speed of fan size by adjusting the output frequency of external frequency converter to meet obstructed flow velocity and export
Demand；Measuring workbench includes four-way lead screw module, measuring device supporting plate 9 and measuring device support frame 11, measuring device support
Plate 9 is installed in four-way lead screw module, and four-way lead screw module can drive measuring device supporting plate 9 to be moved to default position in horizontal plane
It sets and fixes；Measuring device support frame 11 is installed on measuring device supporting plate 9；When examining and determine Pitot tube current meter, Pitot tube
Current meter is installed on measuring device supporting plate 9, and is supported by measuring device support frame 11.Four-way lead screw module includes hand
The straight direction guiding rail 7 of formula and hand-rail type cross slide way 8 are shaken, the straight direction guiding rail 7 of hand-rail type is vertical with wind-tunnel axis, the straight direction guiding rail 7 of hand-rail type
It include guide rail, lead screw and sliding block with hand-rail type cross slide way 8, lead screw is set in guide rail, and sliding block and threads of lead screw cooperation connect
It connects, guide rail can be slider guide；The guide rail of hand-rail type cross slide way 8 is installed on the sliding block of the straight direction guiding rail 7 of hand-rail type, measurement
Equipment supporting plate 9 is installed on the sliding block of hand-rail type cross slide way 8.When examining and determine Pitot tube current meter, Pitot tube current meter peace
Loaded on measurement workbench, and the control route of Pitot tube current meter is connect with supplementary controlled system；The installation of Pitot tube current meter
After measuring workbench, the force samples mouth of Pitot tube current meter is located at the stabilization area of wind-tunnel air outlet, Pitot tube current meter
Force samples mouth is vertical with wind-tunnel air outlet, when adjusting, using the straight direction guiding rail 7 of hand-rail type adjust hand-rail type cross slide way 8 with
Measuring device supporting plate 9 it is whole along longitudinal direction on position, be further able to adjust the position of the force samples mouth of Pitot tube current meter,
The force samples mouth of Pitot tube current meter is set to be located at the stabilization area of wind-tunnel air outlet, the general pressure for adjusting Pitot tube current meter is adopted
Sample mouth is located on the axis of wind-tunnel air outlet；According to the measurement request of the wind speed of wind-tunnel outlet and Pitot tube, hand-rail type is utilized
Cross slide way 8 adjusts the position horizontally of measuring device supporting plate 9, further adjust the force samples mouth of Pitot tube current meter away from
With a distance from wind-tunnel outlet.
Utilize the specific workflow of the calibrating installation calibrating Pitot tube current meter of the Pitot tube current meter of the utility model
It is as follows:
Pitot tube current meter to be examined and determine is installed on measuring device supporting plate 9 first, determines and needs wind-tunnel is default to occur
Flow velocity size, the force samples of Pitot tube current meter are made by adjusting hand-rail type cross slide way 8 and the straight direction guiding rail 7 of hand-rail type
Mouth is located at wind-tunnel air outlet centered position；Then the corresponding centrifugation frequency blower 2 under the wind speed is obtained by check table
Compensation pressure size b at wind speed adjustable plate 4 of blower frequency a and wind-tunnel 3；Then adjustment differential manometer 15 brings it about size
For the compensation pressure of b, the output frequency that frequency converter 14 is arranged is a and starts frequency converter；Then Pitot tube stream is measured with multimeter
The output flow velocity milliampere value of fast instrument and the flow velocity output valve for calculating Pitot tube current meter, or skin support is directly read by control computer
The flow velocity output valve of pipe current meter；Come finally by the error analysis between the output valve and preset flow value of Pitot tube current meter
Assessment is by the performance of trustship current meter to be measured.Same Pitot tube current meter need to generally be chosen high, medium and low three in its range ability
A or more measurement point position carries out Performance Evaluation.
It is as follows to the periodic check process of the calibrating installation of the utility model Pitot tube current meter:
Standard pitot tube is mounted on measurement Board for adjusting vision distance 5 first, it is desirable that the measurement mouth of standard pitot tube is in wind-tunnel mouth
Central axes near；Standard pitot tube connects checked digital pressure gauge by leather hose；Then minute-pressure is adjusted by the table of comparisons
Meter 15 and setting frequency converter 14 after and open frequency converter 14, then read digital pressure gauge on pressure and under wind speed setting
Pressure is compared, and makes two pressure values equal by correcting frequency converter frequency；Revised frequency is recorded at this time and uses this
Frequency replaces the frequency in the table of comparisons, forms the new table of comparisons.
The example that above-described embodiment gives a limited range the utility model is described in detail, and it cannot be said that
The embodiments of the present invention is only limitted to this, all for the utility model person of an ordinary skill in the technical field
Any simple modification and equivalent structure transformation or modification, belong to the utility model according to made by the spirit of the present invention essence
The protection scope that the claims submitted determine.
Claims (8)
1. a kind of calibrating installation of Pitot tube current meter, which is characterized in that including wind-tunnel, supplementary controlled system and for skin
The measurement workbench that the position of trustship current meter is adjusted；The motor of wind-tunnel uses centrifugation frequency blower (2), centrifugation frequency wind
Machine (2) is connect with supplementary controlled system；When examining and determine Pitot tube current meter, Pitot tube current meter is installed on measurement workbench
On, and the control route of Pitot tube current meter is connect with supplementary controlled system；After Pitot tube current meter is installed on measurement workbench,
The force samples mouth of Pitot tube current meter is located at the stabilization area of wind-tunnel air outlet, the force samples mouth and wind-tunnel of Pitot tube current meter
Air outlet is vertical.
2. a kind of calibrating installation of Pitot tube current meter according to claim 1, which is characterized in that wind-tunnel further includes successively
Inducer, contraction section, diffuser, stable section and the jet pipe of coaxial arrangement, the air outlet and inducer of centrifugation frequency blower (2)
Entrance connection, the entrance of the outlet of inducer and contraction section connects, and the outlet of contraction section and the entrance of diffuser connect, diffusion
The outlet of section and the entrance of stable section connect, and the outlet of stable section and the entrance of jet pipe connect, and the outlet of jet pipe is entire wind-tunnel
Outlet.
3. a kind of calibrating installation of Pitot tube current meter according to claim 2, which is characterized in that the outlet of contraction section with
The inlet of diffuser is equipped with throttling set, and throttling set is provided with wind speed adjustable plate (4), and wind speed adjustable plate offers on (4)
The coaxial circular vent with diffuser.
4. a kind of calibrating installation of Pitot tube current meter according to claim 3, which is characterized in that wind speed adjustable plate (4)
Both ends are connected to air bag, and differential pressure gauge is respectively connected on air bag, and the fine tuning that differential pressure gauge is used to export flow velocity compensates.
5. a kind of calibrating installation of Pitot tube current meter according to claim 2, which is characterized in that stable section is provided with bee
Nest rectifier.
6. a kind of calibrating installation of Pitot tube current meter according to claim 1, which is characterized in that measuring workbench includes
Four-way lead screw module, measuring device supporting plate (9) and measuring device support frame (11), measuring device supporting plate (9) are installed on four-way silk
In thick stick module, four-way lead screw module can drive measuring device supporting plate (9) to be moved to predeterminated position and fixation in horizontal plane；Measurement
Equipment support (11) is installed on measuring device supporting plate (9)；When examining and determine Pitot tube current meter, the installation of Pitot tube current meter
It is supported on measuring device supporting plate (9), and by measuring device support frame (11).
7. a kind of calibrating installation of Pitot tube current meter according to claim 6, which is characterized in that four-way lead screw module packet
The straight direction guiding rail of hand-rail type (7) and hand-rail type cross slide way (8) are included, the straight direction guiding rail of hand-rail type (7) is vertical with wind-tunnel axis, hand-rail type
Straight direction guiding rail (7) and hand-rail type cross slide way (8) include guide rail, lead screw and sliding block, and lead screw is set in guide rail, sliding block and silk
Thick stick is threadedly engaged connection, and guide rail can be slider guide；The guide rail of hand-rail type cross slide way (8) is installed on the straight direction guiding rail of hand-rail type
(7) on sliding block, measuring device supporting plate (9) is installed on the sliding block of hand-rail type cross slide way (8).
8. a kind of calibrating installation of Pitot tube current meter according to claim 1, which is characterized in that further include measurement spacing
Plate (5), measurement Board for adjusting vision distance (5) is set to the outlet of wind-tunnel, for fixing force samples mouth and the instruction of Pitot tube current meter
The force samples mouth of Pitot tube current meter is apart from the position that wind-tunnel exports.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920250760.6U CN209640374U (en) | 2019-02-27 | 2019-02-27 | A kind of calibrating installation of Pitot tube current meter |
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| CN201920250760.6U CN209640374U (en) | 2019-02-27 | 2019-02-27 | A kind of calibrating installation of Pitot tube current meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113390603A (en) * | 2021-06-17 | 2021-09-14 | 哈尔滨工业大学 | Wind speed measuring device for low-pressure high-speed Mars wind tunnel and precision improving method thereof |
-
2019
- 2019-02-27 CN CN201920250760.6U patent/CN209640374U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113390603A (en) * | 2021-06-17 | 2021-09-14 | 哈尔滨工业大学 | Wind speed measuring device for low-pressure high-speed Mars wind tunnel and precision improving method thereof |
| CN113390603B (en) * | 2021-06-17 | 2022-09-13 | 哈尔滨工业大学 | Wind speed measuring device for low-pressure high-speed Mars wind tunnel and precision improving method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A verification device for pitot tube current meter Effective date of registration: 20211201 Granted publication date: 20191115 Pledgee: Pudong Development Bank of Shanghai Limited by Share Ltd. Xi'an branch Pledgor: XI'AN DINGYAN TECHNOLOGY CO.,LTD. Registration number: Y2021610000379 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20221215 Granted publication date: 20191115 Pledgee: Pudong Development Bank of Shanghai Limited by Share Ltd. Xi'an branch Pledgor: XI'AN DINGYAN TECHNOLOGY CO.,LTD. Registration number: Y2021610000379 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Calibration Device for Pitot Tube Velocimeter Effective date of registration: 20221220 Granted publication date: 20191115 Pledgee: Pudong Development Bank of Shanghai Limited by Share Ltd. Xi'an branch Pledgor: XI'AN DINGYAN TECHNOLOGY CO.,LTD. Registration number: Y2022610000815 |