CN209166602U - Positive pressure method gas flow caliberating device - Google Patents
Positive pressure method gas flow caliberating device Download PDFInfo
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- CN209166602U CN209166602U CN201822251397.8U CN201822251397U CN209166602U CN 209166602 U CN209166602 U CN 209166602U CN 201822251397 U CN201822251397 U CN 201822251397U CN 209166602 U CN209166602 U CN 209166602U
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000007781 pre-processing Methods 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims description 18
- 230000006837 decompression Effects 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013102 re-test Methods 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model discloses a kind of positive pressure method gas flow caliberating devices, including controller, gas pre-processing assembly, preposition regulation component, gas supply assembly, postposition regulation component and measurement component, the gas pre-processing assembly, preposition regulation component, gas supply assembly, postposition regulation component and measurement component are sequentially connected with, the air inlet of the gas pre-processing assembly and the gas outlet of air compressor machine connect, the gas supply assembly includes stagnation container, several sonic nozzles and third pressure transmitter are provided on the stagnation container, the air inlet of the stagnation container is connected to the gas outlet of preposition regulation component, the gas outlet of the sonic nozzle is connected to the air inlet of postposition regulation component, the controller is connect with third pressure transmitter and preposition regulation component signal respectively.The utility model adjusts preposition regulation component according to the gas pressure detection result in stagnation container, improves the pressure precision and stability of the gas of gas supply assembly offer.
Description
Technical field
The utility model relates to gas flowmeter calibration facility fields, demarcate more particularly to a kind of positive pressure method gas flow
Device.
Background technique
With the fast development of scientific research technology in recent years, the research of gas flow caliberating device and using more and more extensive.
Can as standard high-precision gas flowmeter at present substantially there are two types of, sonic nozzle type and coriolis force type.For low pressure (pressure
Power is lower than 1MPa) calibration of gas, sonic nozzle has precision high (2 ‰), re-testing periods long (5 years), and component is reliable, performance
The advantages that stable, easy to maintain；And coriolis force type will reach 2 ‰ precision, gas pressure needs to reach 5MPa or more, therefore energy
Consumption is high, and investment is big, thus coriolis force type applied in terms of fluid flow calibration it is more.
Sonic nozzle gas flow caliberating device is divided into positive pressure method and two kinds of negative pressure method.Negative pressure method structure is relatively easy, skill
Art is more mature, and application is wider.Positive pressure method requires height to gas source, and control difficulty is big, needs the higher pressure control program of technology,
Device flow calibration range is wide.Most importantly flow instruments most of on the market are higher than atmospheric pressure at present, and positive pressure method is in quilt
Pressure is adjustable before examining flowmeter, close with the operating condition of tested flowmeter, can play simulation effect well, flow to research
Influence etc. of the variation of meter dynamic response characteristic, gas pressure and density to flowmeter has profound significance, therefore
Positive pressure method has higher researching value.Existing positive pressure method gas flow caliberating device there are precision not high enough, stability is not
The deficiencies of good.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of positive pressure method gas flow calibration dress
It sets.
The purpose of this utility model is achieved through the following technical solutions: positive pressure method gas flow caliberating device, packet
Include controller, gas pre-processing assembly, preposition regulation component, gas supply assembly, postposition regulation component and measurement component, the gas
Pre-processing assembly, preposition regulation component, gas supply assembly, postposition regulation component and measurement component are sequentially connected with, and the gas is located in advance
The gas outlet of the air inlet and air compressor machine of managing component connects, and the gas supply assembly includes stagnation container, is set on the stagnation container
It is equipped with several sonic nozzles and third pressure transmitter, the air inlet of the stagnation container and the gas outlet of preposition regulation component
Connection, the gas outlet of the sonic nozzle is connected to the air inlet of postposition regulation component, the controller respectively with third pressure
Transmitter is connected with preposition regulation component signal.
Preferably, the gas pre-processing assembly include sequentially connected first filter, drying machine, the second filter,
Air accumulator and shut-off valve, the air inlet of the first filter are connected to the gas outlet of air compressor machine, the gas outlet of the shut-off valve
It is connected to the air inlet of preposition regulation component.
Preferably, the preposition regulation component includes sequentially connected first pneumatic ball valve, third filter, the first pressure regulation
The air inlet of valve, vacuum tank and pressure regulation valve group, first pneumatic ball valve is connected to the gas outlet of gas pre-processing assembly, described
The gas outlet of pressure regulation valve group is connected to the air inlet of gas supply assembly, is equipped between first pressure regulator valve and gas pre-processing assembly
First pressure transmitter and the first temperature transmitter are equipped with second pressure transmitter between first pressure regulator valve and vacuum tank,
First pneumatic ball valve, the first pressure regulator valve, first pressure transmitter, second pressure transmitter, the first temperature transmitter and tune
Pressure valve group is connect with controller signals.
Preferably, the pressure regulation valve group includes several second pressure regulator valves in parallel, the air inlet of second pressure regulator valve
The gas outlet of vacuum tank connects, and the gas outlet of second pressure regulator valve and the air inlet of gas supply assembly connect, second pressure regulation
Valve is connect with controller signals.
Preferably, several second temperature transmitters and emergency decompression valve are also equipped on the stagnation container, it is described urgent
The first muffler is connected on relief valve, the second temperature transmitter and emergency decompression valve are connect with controller signals.
Preferably, the postposition regulation component includes several Pneumatic ball valve groups, confluence container, third pressure regulator valve and confluence
Pipe, the Pneumatic ball valve group, confluence container, third pressure regulator valve and collecting pipe are sequentially connected with, the air inlet of the Pneumatic ball valve group
It connects one to one with the gas outlet of sonic nozzle, the gas outlet of the collecting pipe is connect with the air inlet of measurement component, described
The 5th pressure transmitter, the Pneumatic ball valve group, the 5th pressure transmitter and third pressure regulator valve and control are provided on confluence container
Device signal connection processed.
Preferably, the Pneumatic ball valve group includes two the second pneumatic ball valves being serially connected, two the second pneumatic ball valves
Between be equipped with the 4th pressure transmitter, second pneumatic ball valve and the 4th pressure transmitter are connect with controller signals.
Preferably, the measurement component includes several measuring units, evacuated tube, the 4th pressure regulator valve and the second muffler,
The measuring unit, evacuated tube, the 4th pressure regulator valve and the second muffler are sequentially connected with, the air inlet and postposition of the measuring unit
The gas outlet of regulation component connects, and the measuring unit and the 4th pressure regulator valve are connect with controller signals.
Preferably, the measuring unit includes third pneumatic ball valve, the 4th pneumatic ball valve, by test specimen mounting structure and differential pressure
Transmitter, the third pneumatic ball valve are sequentially connected with by test specimen mounting structure and the 4th pneumatic ball valve, the third pneumatic ball valve
Air inlet connect with the gas outlet of postposition regulation component, the air inlet of the gas outlet of the 4th pneumatic ball valve and evacuated tube connects
It connects, each both ends by test specimen mounting structure are parallel with a differential pressure transmitter, and the third pneumatic ball valve is installed with by test specimen
The 6th pressure transmitter and third temperature transmitter, the third pneumatic ball valve, the 4th pneumatic ball valve, differential pressure are equipped between structure
Transmitter, the 6th pressure transmitter and third temperature transmitter are connect with controller signals.
The beneficial effects of the utility model are:
(1) gas pressure in stagnation container is detected by third pressure transmitter in the utility model, and according to detection
As a result it is adjusted using preposition regulation component, the pressure precision and stability of the gas of gas supply assembly offer is provided, it is whole
Precision is 4 ‰, and stability is 3 ‰；
(2) first filter, the second filter and third filter constitute three-level gas filtering structure, can effectively filter out gas
Impurity in body guarantees the cleanliness of the gas entered in subsequent device；
(3) first mufflers and the second muffler can effectively reduce the noise that device discharges gas, improve operation ring
Border condition；
(4) other than artificial clamping is detected flowmeter well, other operations can calculated the utility model by operator
It is completed on the controllers such as machine, it is easy to operate；
(5) caliberating device works under level pressure, is combined by sonic nozzle in parallel, constitutes different flow point.
Detailed description of the invention
Fig. 1 is a kind of composition block diagram of positive pressure method gas flow caliberating device；
Fig. 2 is a kind of composition schematic diagram of positive pressure method gas flow caliberating device；
In figure, 1-shut-off valve, 2-first pressure transmitters, the 3-the first temperature transmitter, the 4-the first pneumatic ball valve,
5-third filters, the 6-the first pressure regulator valve, 7-second pressure transmitters, 8-vacuum tanks, the 9-the first safety valve, 10-pressures
Power table, the 11-the second pressure regulator valve, 12-stagnation containers, 13-sonic nozzles, 14-third pressure transmitters, the 15-the second temperature
Degree transmitter, the 16-the second safety valve, 17-emergency decompression valves, the 18-the first muffler, the 19-the second pneumatic ball valve, 20-the
Four pressure transmitters, 21-confluence containers, the 22-the five pressure transmitter, 23-third pressure regulator valves, 24-collecting pipes, 25-the
Three pneumatic ball valves, the 26-the six pressure transmitter, 27-third temperature transmitters, 28-by test specimen mounting structure, 29-differential pressures
Transmitter, the 30-the four pneumatic ball valve, 31-evacuated tubes, the 32-the four pressure regulator valve, the 33-the second muffler.
Specific embodiment
Below in conjunction with embodiment, the technical solution of the utility model is clearly and completely described, it is clear that retouched
The embodiment stated is only the utility model a part of the embodiment, instead of all the embodiments.Based in the utility model
Embodiment, those skilled in the art's every other embodiment obtained under the premise of not making the creative labor, all belongs to
In the range of the utility model protection.
Refering to fig. 1-2, a kind of positive pressure method gas flow caliberating device is present embodiments provided:
As shown in Figure 1, positive pressure method gas flow caliberating device, including controller, gas pre-processing assembly, preposition pressure regulation group
Part, gas supply assembly, postposition regulation component and measurement component, the gas pre-processing assembly, preposition regulation component, gas supply assembly,
Postposition regulation component and measurement component are sequentially connected with, and the air inlet of the gas pre-processing assembly and the gas outlet of air compressor machine connect
It connects.The equipment such as computer can be used in the controller.
As shown in Fig. 2, the gas pre-processing assembly includes sequentially connected first filter, drying machine, the second filtering
Device, air accumulator and shut-off valve 1, the air inlet of the first filter are connected to the gas outlet of air compressor machine.
The preposition regulation component includes the first pneumatic ball valve 4, third filter 5, the first pressure regulator valve 6, vacuum tank 8 and adjusts
Pressure valve group, the pressure regulation valve group include several second pressure regulator valves 11 in parallel, first pneumatic ball valve 4, the first pressure regulator valve
6, vacuum tank 8 and the second pressure regulator valve 11 are sequentially connected with, and the air inlet of first pneumatic ball valve 4 and the gas outlet of shut-off valve 1 connect
It connects；Between first pressure regulator valve 6 and shut-off valve 1 be equipped with first pressure transmitter 2 and the first temperature transmitter 3, described first
Second pressure transmitter 7 is equipped between pressure regulator valve 6 and vacuum tank 8, the vacuum tank 8 is equipped with the first safety valve 9；Described first
Pneumatic ball valve 4, the first pressure regulator valve 6, the second pressure regulator valve 11, first pressure transmitter 2, second pressure transmitter 7, the first temperature become
Device 3 and the first safety valve 9 is sent to connect with controller signals.
The gas supply assembly includes stagnation container 12, the outlet of the air inlet of the stagnation container 12 and the second pressure regulator valve 11
Mouth connection；Several sonic nozzles 13, several second temperature transmitters 15, third pressure are provided on the stagnation container 12
Transmitter 14, the second safety valve 16 and emergency decompression valve 17 are connected with the first muffler 18 on the emergency decompression valve 17；It is described
Second temperature transmitter 15, third pressure transmitter 14, the second safety valve 16 and emergency decompression valve 17 are connect with controller signals.
The postposition regulation component includes several Pneumatic ball valve groups, confluence container 21, third pressure regulator valve 23 and collecting pipe
24, the Pneumatic ball valve group, confluence container 21, third pressure regulator valve 23 and collecting pipe 24 are sequentially connected with, the Pneumatic ball valve group
The gas outlet of air inlet and sonic nozzle 13 connects one to one；The Pneumatic ball valve group includes two the second gas being serially connected
Dynamic ball valve 19 is equipped with the 4th pressure transmitter 20 between two the second pneumatic ball valves 19, and the is provided on the confluence container 21
Five pressure transmitters 22；Second pneumatic ball valve 19, the 4th pressure transmitter 20, the 5th pressure transmitter 22 and third pressure regulation
Valve 23 is connect with controller signals.
The measurement component includes several measuring units, evacuated tube 31, the 4th pressure regulator valve 32 and the second muffler 33, institute
Stating measuring unit includes third pneumatic ball valve 25, the 4th pneumatic ball valve 30, by test specimen mounting structure 28 and differential pressure transmitter 29, institute
State third pneumatic ball valve 25, by test specimen mounting structure 28, the 4th pneumatic ball valve 30, evacuated tube 31, the 4th pressure regulator valve 32 and second
Muffler 33 is sequentially connected with；The air inlet of the third pneumatic ball valve 25 is connect with the gas outlet of collecting pipe 24, each by test specimen
The both ends of mounting structure 28 are parallel with a differential pressure transmitter 29, the third pneumatic ball valve 25 with by test specimen mounting structure 28
Between be equipped with the 6th pressure transmitter 26 and third temperature transmitter 27；The third pneumatic ball valve 25, the 4th pneumatic ball valve 30,
Differential pressure transmitter 29, the 6th pressure transmitter 26, third temperature transmitter 27 and the 4th pressure regulator valve 32 are connect with controller signals.
Working principle are as follows: the compressed air that air compressor machine provides is through first filter, drying machine, the second filter and air accumulator
Third filter 5 is reached, first filter, the second filter and third filter 5 constitute three-stage filtration structure, and gas is through filtering
Reach the quality requirements of Acceptance Test gas source afterwards, the pressure of gas is in 850kPa at this time.Open the first pneumatic ball valve 4, gas into
Enter the first pressure regulator valve 6, the pressure of compressed air in vacuum tank 8 is adjusted to 650kPa ± 10kPa by the first pressure regulator valve 6, then again
Intense adjustment is carried out by pressure of second pressure regulator valve 11 to air, so that the air-pressure stable in stagnation container 12 is in 550kPa
± 5kPa (pressure test sensor accuracy ± 0.1%).The stable gas source of pressure is after sonic nozzle 13 in stagnation container 12
Third pressure regulator valve 23 is reached, third pressure regulator valve 23 is adjusted the outlet pressure of sonic nozzle 13, to meet the velocity of sound chosen
Nozzle 13 works within the scope of critical pressure (≤550kPa ± 5kPa), while the inlet pressure for controlling tested flowmeter exists
In coverage.Gas source enters the second muffler 33 after tested flowmeter, by the 4th regulating valve, finally drains emptying into big
Gas.
For example, when if necessary to Acceptance Test 1550kg/h flow, as required, choosing sonic nozzle when Acceptance Test
13W1 (50kg/h), W2 (100kg/h), W3 (200kg/h), W4 (400kg/h), W5 (800kg/h) are worked at the same time, and opening pair
The pneumatic ball valve answered (all pneumatic ball valves are all normally offs)；According to the bore of tested flowmeter and installation site gating pair
The pneumatic ball valve of pipeline is answered to complete.
Self-driven pressure-adjusting valve, the vacuum tank 8, stagnation container can be used in first pressure regulator valve 6 and third pressure regulator valve 23
12, pressure gauge 10 is equipped on confluence container 21 and collecting pipe 24.
Proving flowmeter is illustrated below, 13 mass flow calculation formula of sonic nozzle is,
In formula, qmFor mass flow (kg/s), A*For throat's inner section product (m2), C is efflux coefficient, C*For critical flow letter
Number, P0It is universal gas constant for stagnation pressure (Pa), R, M is molal weight (g/mol), T0For stagnation temperature (K).
Throat's inner section product A of sonic nozzle 13*With efflux coefficient C by having the calibration of the metering institute of data, critical flow
C*, universal gas constant R and molal weight M be fixed value, consult reference materials, universal gas constant R is 8.3143J/kg
The molal weight of mol, dry air are 0.0289634kg/mol, and device measures stagnation pressure P0With stagnation temperature T0Formula is substituted into,
Normal stream magnitude can be calculated.
Device precision (uncertainty) is analyzed below.According to 13 mass flow calculation formula of sonic nozzleSince the calibrating of sonic nozzle 13 is identical, throat's inner section product with use condition, medium
A*, critical flow C*, universal gas constant R and molal weight M value be it is identical, their uncertainty can be ignored.Cause
This, testing stand analysis on Uncertainty mainly considers: efflux coefficient C, stagnation pressure P0, stagnation temperature T0, press before tested flowmeter
Temperature and TT&C system capture card before power, tested flowmeter.
The uncertainty of efflux coefficient C: by vertification regulation requirement, under 95% fiducial probability, U=0.2% (sonic nozzle
13 uncertainty, the calibration of metering institute, China), because pendulous frequency is 6, ta=2.45, then
ur(C)=0.2%/2.45=0.1%.
Stagnation pressure P before sonic nozzle 130Uncertainty: by vertification regulation requirement, pressure measuring instruments accuracy
Grade is not less than 0.1 grade, and in order to improve the precision of device, the precision of pressure transmitter is increased to 0.05 grade, and pressure uncertainty is
± 0.05%, pressure uses at full scale 2/3, considers by the rectangular distribution, then
Stagnation temperature T before sonic nozzle 130Uncertainty: by vertification regulation requirement, the scale division value of temperature measuring instrument
Not less than 0.1 DEG C, class of accuracy is not less than 0.1 grade, and gas temperature is 20 DEG C, considers by the rectangular distribution, then
The uncertainty of pressure before tested flowmeter: analysis method is the same as stagnation pressure P before sonic nozzle 130It is uncertain
Degree, ur(Pm)=0.000433.
The uncertainty of temperature before tested flowmeter: analysis method is the same as stagnation temperature T before sonic nozzle 130It is uncertain
Degree, ur(Tm)=0.000197.
Capture card uncertainty: ur(Rm)=0.0003.
Device combined standard uncertainty:
Device expanded uncertainty: according to vertification regulation, fiducial probability is about 95%, k=2, then expanded uncertainty is
U=k × u=2 × 0.001242=0.002484.
The some experimental data of the caliberating device of the present embodiment is provided below.
The above is only the preferred embodiment of the utility model, it should be understood that the utility model is not limited to herein
Disclosed form, should not be regarded as an exclusion of other examples, and can be used for other combinations, modifications, and environments, and
Can be in contemplated scope described herein, modifications can be made through the above teachings or related fields of technology or knowledge.And this field
The modifications and changes that personnel are carried out do not depart from the spirit and scope of the utility model, then all should be in right appended by the utility model
It is required that protection scope in.
Claims (9)
1. positive pressure method gas flow caliberating device, which is characterized in that including controller, gas pre-processing assembly, preposition pressure regulation group
Part, gas supply assembly, postposition regulation component and measurement component, the gas pre-processing assembly, preposition regulation component, gas supply assembly,
Postposition regulation component and measurement component are sequentially connected with, and the air inlet of the gas pre-processing assembly and the gas outlet of air compressor machine connect
Connect, the gas supply assembly includes stagnation container (12), be provided on the stagnation container (12) several sonic nozzles (13) and
The air inlet of third pressure transmitter (14), the stagnation container (12) is connected to the gas outlet of preposition regulation component, the sound
The gas outlet of fast nozzle (13) is connected to the air inlet of postposition regulation component, the controller respectively with third pressure transmitter
(14) it is connected with preposition regulation component signal.
2. positive pressure method gas flow caliberating device according to claim 1, which is characterized in that the gas pre-processing assembly
Including sequentially connected first filter, drying machine, the second filter, air accumulator and shut-off valve (1), the first filter
Air inlet is connected to the gas outlet of air compressor machine, and the gas outlet of the shut-off valve (1) is connected to the air inlet of preposition regulation component.
3. positive pressure method gas flow caliberating device according to claim 1, which is characterized in that the preposition regulation component packet
Sequentially connected first pneumatic ball valve (4), third filter (5), the first pressure regulator valve (6), vacuum tank (8) and pressure regulation valve group are included,
The air inlet of first pneumatic ball valve (4) is connected to the gas outlet of gas pre-processing assembly, the gas outlet of the pressure regulation valve group
It is connected to the air inlet of gas supply assembly, first pressure pick-up is equipped between first pressure regulator valve (6) and gas pre-processing assembly
Device (2) and the first temperature transmitter (3) are equipped with second pressure transmitter between first pressure regulator valve (6) and vacuum tank (8)
(7), first pneumatic ball valve (4), the first pressure regulator valve (6), first pressure transmitter (2), second pressure transmitter (7),
One temperature transmitter (3) and pressure regulation valve group are connect with controller signals.
4. positive pressure method gas flow caliberating device according to claim 3, which is characterized in that if the pressure regulation valve group includes
Dry the second pressure regulator valve (11) in parallel, the gas outlet connection of the air inlet vacuum tank (8) of second pressure regulator valve (11) are described
The gas outlet of second pressure regulator valve (11) and the air inlet of gas supply assembly connect, and second pressure regulator valve (11) and controller signals connect
It connects.
5. positive pressure method gas flow caliberating device according to claim 1, which is characterized in that on the stagnation container (12)
It is also equipped with several second temperature transmitters (15) and emergency decompression valve (17), is connected with first on the emergency decompression valve (17)
Muffler (18), the second temperature transmitter (15) and emergency decompression valve (17) are connect with controller signals.
6. positive pressure method gas flow caliberating device according to claim 1, which is characterized in that the postposition regulation component packet
Several Pneumatic ball valve groups, confluence container (21), third pressure regulator valve (23) and collecting pipe (24) are included, the Pneumatic ball valve group is converged
Stream container (21), third pressure regulator valve (23) and collecting pipe (24) are sequentially connected with, and the air inlet and velocity of sound of the Pneumatic ball valve group spray
The gas outlet of mouth (13) connects one to one, and the gas outlet of the collecting pipe (24) is connect with the air inlet of measurement component, described
The 5th pressure transmitter (22) is provided in confluence container (21), the Pneumatic ball valve group, the 5th pressure transmitter (22) and the
Three pressure regulator valves (23) are connect with controller signals.
7. positive pressure method gas flow caliberating device according to claim 6, which is characterized in that the Pneumatic ball valve group includes
Two the second pneumatic ball valves (19) being serially connected are equipped with the 4th pressure transmitter between two the second pneumatic ball valves (19)
(20), second pneumatic ball valve (19) and the 4th pressure transmitter (20) are connect with controller signals.
8. positive pressure method gas flow caliberating device according to claim 1, which is characterized in that if the measurement component includes
A dry measuring unit, evacuated tube (31), the 4th pressure regulator valve (32) and muffler (33), the measuring unit, evacuated tube (31), the
Four pressure regulator valves (32) and muffler (33) are sequentially connected with, and the air inlet of the measuring unit and the gas outlet of postposition regulation component connect
It connects, the measuring unit and the 4th pressure regulator valve (32) are connect with controller signals.
9. positive pressure method gas flow caliberating device according to claim 8, which is characterized in that the measuring unit includes the
Three pneumatic ball valves (25), the 4th pneumatic ball valve (30), by test specimen mounting structure (28) and differential pressure transmitter (29), the third gas
Dynamic ball valve (25) are sequentially connected with, the third pneumatic ball valve (25) by test specimen mounting structure (28) and the 4th pneumatic ball valve (30)
Air inlet connect with the gas outlet of postposition regulation component, the gas outlet of the 4th pneumatic ball valve (30) and evacuated tube (31)
Air inlet connection, each both ends by test specimen mounting structure (28) are parallel with a differential pressure transmitter (29), and the third is pneumatic
Ball valve (25) and by between test specimen mounting structure (28) be equipped with the 6th pressure transmitter (26) and third temperature transmitter (27), institute
State third pneumatic ball valve (25), the 4th pneumatic ball valve (30), differential pressure transmitter (29), the 6th pressure transmitter (26) and third temperature
Degree transmitter (27) is connect with controller signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822251397.8U CN209166602U (en) | 2018-12-29 | 2018-12-29 | Positive pressure method gas flow caliberating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822251397.8U CN209166602U (en) | 2018-12-29 | 2018-12-29 | Positive pressure method gas flow caliberating device |
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| Publication Number | Publication Date |
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| CN209166602U true CN209166602U (en) | 2019-07-26 |
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ID=67328032
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686758A (en) * | 2019-09-26 | 2020-01-14 | 西安航天计量测试研究所 | Sound velocity nozzle gas flow standard device capable of switching pressure sources and control method thereof |
-
2018
- 2018-12-29 CN CN201822251397.8U patent/CN209166602U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686758A (en) * | 2019-09-26 | 2020-01-14 | 西安航天计量测试研究所 | Sound velocity nozzle gas flow standard device capable of switching pressure sources and control method thereof |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Positive pressure gas flow calibration device Effective date of registration: 20210207 Granted publication date: 20190726 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: Chengdu Oukai Technology Co.,Ltd. Registration number: Y2021980001103 |
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