CN205808520U - The big flow detector of closed loop gas low flow velocity - Google Patents
The big flow detector of closed loop gas low flow velocity Download PDFInfo
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- CN205808520U CN205808520U CN201620655952.1U CN201620655952U CN205808520U CN 205808520 U CN205808520 U CN 205808520U CN 201620655952 U CN201620655952 U CN 201620655952U CN 205808520 U CN205808520 U CN 205808520U
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- gas
- closed loop
- high pressure
- flow velocity
- centrifugal high
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Abstract
This utility model belongs to gauge check and collimation technique field, particularly relates to the closed loop big flow detector of gas low flow velocity.I.e. for the big flow instrument of gas low flow velocity real stream examination criteria device, it is particularly directed to the device that the DN600 DN1200 above gas flow of millimeter bore carries out detecting.This utility model includes centrifugal high pressure fan, specifically it is sequentially connected with making-up air device, deafener by centrifugal high pressure fan, the deafener other end connects heat exchanger, the heat exchanger other end connects vacuum tank, the vacuum tank other end connects regulation valve, regulation valve is connected with gas standard table, gas standard table is connected with pneumatic control valve, pneumatic control valve another end is connected with signal piping, tested effusion meter successively by pneumatic test system, and tested effusion meter another end and centrifugal high pressure fan are connected to form closed loop system.The detection of heavy caliber low flow velocity big flow gas flow instrument and the detection of calibration standard set-up can be realized, it is to avoid artificial installation brings alignment error.
Description
Technical field
This utility model belongs to gauge check and collimation technique field, particularly relates to the inspection of closed loop gas low flow velocity big flow
Survey device.I.e. for the big flow instrument of gas low flow velocity real stream examination criteria device, it is particularly directed to DN600 DN1200 millimeter
The above gas flow of bore carries out the device detected.
Background technology
At present flow detection and calibration industry field the most at home or even in world wide, to more than DN600 DN1200 milli
Gas flowmeter more than rice bore does not also accomplish that carrying out real stream with gas detects or the accuracy of calibration product.For exceeding
Its detection method of gas flowmeter more than DN600 DN1200 millimeter bore can only rely on Theoretical Calculation or with water flow standard
Device tests for band gas flow standard device, then calculates instrument coefficient.And also exist certain in actual applications
Error, especially the most prominent to embodying in nonstandard product testing calibration process, give use unit management on bring many not
Just.
Summary of the invention
This utility model is in order to solve above-mentioned DN600 DN1200 millimeter bore above heavy caliber detection of gas flow rate standard
Device problem and provide a kind of closed loop big flow detector of gas low flow velocity and method.
For achieving the above object, this utility model is achieved in the following ways:
Centrifugal high pressure fan is sequentially connected with making-up air device, deafener, and the other end of deafener connects heat exchanger, heat exchanger
The other end connect vacuum tank, the other end of vacuum tank connects regulation valve, and regulation valve is connected with gas standard table, gas standard table
Be connected with pneumatic control valve, the other end of pneumatic control valve by pneumatic test system successively with signal piping, tested effusion meter
Being connected, the other end of tested effusion meter is connected with centrifugal high pressure fan, thus constitutes closed loop system.
Described closed loop system is connected with microcomputer room.
Advantage of the present utility model and providing the benefit that:
One of this utility model advantage is to achieve detection and the calibration of heavy caliber low flow velocity big flow gas flow instrument
The detection function of standard set-up.
The two of this utility model advantage are that system process temperature requirement utilizes cold water circulating system control system with heat exchanger
During system realizes detection, temperature is accurately controlled, and Stress control can eliminate Pulse Pressure with High Frequency fluctuation accurately.
The three of this utility model advantage are the standard scales in on-line calibration device, it is to avoid bring in dismounting and installation process
Artificial systematic error.
This utility model device is owing to using the design of cooling recirculation system and heat exchanger phase structure, it is possible to accurately control
Process gas temperature processed changes, and utilizes gas vacuum tank to eliminate the pulsation phenomenon that gas produces.Use standard scale on-line checking school
Accurate, it is to avoid artificial installation brings alignment error.Can be widely applied to the fields such as gauge check and calibration, there is preferable market
Application prospect.This utility model will make irreplaceable contribution for China's gauge check industry, and having preferable market should
Use prospect.
Below in conjunction with the accompanying drawings and specific embodiment, this utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation,
Fig. 2 is the structure for amplifying schematic diagram of sonic nozzle standard set-up dynamical system part in Fig. 1；
Fig. 3 is the structure for amplifying schematic diagram of sonic nozzle standard set-up detecting system part in Fig. 1；
Fig. 4 is the structure for amplifying schematic diagram of Fig. 1 medium power source of the gas part.
In figure: centrifugal high pressure fan 1, making-up air device 2, deafener 3, heat exchanger 4, vacuum tank 5, regulate valve 6, gas standard
Table 7, pneumatic control valve 8, pneumatic test system 9, signal piping 10, tested effusion meter 11, microcomputer room 12, sonic nozzle standard fills
Put 13.
Detailed description of the invention
Embodiment 1:
This utility model is a kind of closed loop big flow detector of gas low flow velocity, as Figure 1-Figure 4, concrete structure
As follows: to include centrifugal high pressure fan 1, making-up air device 2, deafener 3, heat exchanger 4, vacuum tank 5, regulate valve 6, gas standard table 7,
Pneumatic control valve 8, pneumatic test system 9, signal piping 10, tested effusion meter 11, microcomputer room 12, sonic nozzle standard set-up
13.Composition loop-type gas flow standard device.
Wherein: centrifugal high pressure fan 1 is sequentially connected with making-up air device 2, deafener 3, the other end of deafener 3 connects heat exchange
Device 4, the other end of heat exchanger 4 connects vacuum tank 5, and the other end of vacuum tank 5 connects regulation valve 6, regulation valve 6 and gas standard table
7 connect, gas standard table 7 is connected with pneumatic control valve 8, the other end of pneumatic control valve 8 by pneumatic test system 9 successively with
Signal piping 10, tested effusion meter 11 are connected, and the other end of tested effusion meter 11 is connected with centrifugal high pressure fan 1, thus
Constitute closed loop system.Whole system controls to be operated by microcomputer room 12.Forming closed-loop system main purpose is to reduce to detect
The impact that in journey, gas temperature change and head fluctuation produce.The noise utilizing deafener to produce blower fan processes, and reaches
To environmental protection requirement.
The present invention selects cooling recirculation system detecting system gas technology temperature accurately to be controlled with heat exchanger；Use
Vacuum tank eliminates pulse process gases phenomenon；And standard scale can be calibrated with on-line checking.
Specific works process of the present utility model is as follows:
By centrifugal high pressure fan 1 delivery air, enter deafener 3 by pipeline, enter heat exchanger through deafener 3 gas
4 carry out heat exchange.Gas after heat exchange enters vacuum tank 5 and eliminates pulsation phenomenon, then through overregulate valve 6, gas standard table 7,
Flow is regulated by pneumatic control valve 8.By pipeline and pneumatic test system 9, signal piping 10, after being connected with tested effusion meter 11
Return to centrifugal high pressure fan 1 and form closed loop system.Gas standard table 7 is by signal piping and upper level sonic nozzle standard set-up
13 are connected carries out on-line checking.
By centrifugal high pressure fan 1 by measured instrument necessary flow requirement by VFC discharge quantity of fan,
The noise utilizing deafener to produce blower fan processes, and reaches environmental protection requirement.
Air, before entering the instrument of detection and calibration, makes air be situated between by the energy exchange of heat exchanger 4
Matter is maintained under calibrating and calibration condition, and then ensures technological requirement.
Air, through the adjustment of vacuum tank 5, filters the dither in system, for standard scale group 7 provide one the most steady
Fixed fluid field pressure.
Standard scale group 7, under the regulation of the regulation valve 8 in respective downstream, is operated in the range of flow that each self calibration is crossed, obtains
Obtain device calibrating required standard flow.
Air enters signal piping and tested effusion meter 11 by pipeline again, eventually passes back to the entrance of centrifugal high pressure fan 1,
Form closed circulation system.
The air lost is supplemented during detection by making-up air device 2 system, it is ensured that system source of the gas supplies.
System process temperature and pressure oscillation are accurately controlled by this utility model；Control to have employed heat exchanger to system temperature
4 devices realize detecting temperature process requirement, control to take vacuum tank 5 and through CFD to the pressure oscillation during detection
Computed in software is verified, can filter the dither in system, provides a relatively stable fluid field pressure for system.Pressure bow wave
Move in the range of caning be controlled in 0.2%.
The calibration of online standard scale: the generally standard scale 7 on flow standard device needs often to disassemble to deliver to higher level
Detection department is detected.Not only waste time and energy, due also to install different with demarcation state from use condition and produce measurement by mistake
Standard scale is switched to sonic nozzle standard set-up 13 by suitable pipe arrangement by this device of difference, it is achieved the reality of standard scale 7
Time calibration, it is to avoid reinstall the error of generation.
Claims (2)
1. the big flow detector of closed loop gas low flow velocity, including centrifugal high pressure fan (1), is characterized in that: centrifugal high pressure wind
Machine (1) is sequentially connected with making-up air device (2), deafener (3), and the other end of deafener (3) connects heat exchanger (4), heat exchanger (4)
The other end connect vacuum tank (5), the other end of vacuum tank (5) connects regulation valve (6), regulation valve (6) and gas standard table (7)
Connecting, gas standard table (7) is connected with pneumatic control valve (8), and the other end of pneumatic control valve (8) is by pneumatic test system
(9) it is connected with signal piping (10), tested effusion meter (11) successively, the other end of tested effusion meter (11) and centrifugal high pressure wind
Machine (1) is connected, thus constitutes closed loop system.
The closed loop big flow detector of gas low flow velocity the most according to claim 1, is characterized in that: described closed loop system
It is connected with microcomputer room (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620655952.1U CN205808520U (en) | 2016-06-28 | 2016-06-28 | The big flow detector of closed loop gas low flow velocity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620655952.1U CN205808520U (en) | 2016-06-28 | 2016-06-28 | The big flow detector of closed loop gas low flow velocity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205808520U true CN205808520U (en) | 2016-12-14 |
Family
ID=57506126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620655952.1U Active CN205808520U (en) | 2016-06-28 | 2016-06-28 | The big flow detector of closed loop gas low flow velocity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205808520U (en) |
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2016
- 2016-06-28 CN CN201620655952.1U patent/CN205808520U/en active Active
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |