CN206420537U - Gas flow standard device vacuum source limiting pressure control system - Google Patents
Gas flow standard device vacuum source limiting pressure control system Download PDFInfo
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- CN206420537U CN206420537U CN201621277794.7U CN201621277794U CN206420537U CN 206420537 U CN206420537 U CN 206420537U CN 201621277794 U CN201621277794 U CN 201621277794U CN 206420537 U CN206420537 U CN 206420537U
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Abstract
The utility model gas flow standard device vacuum source limiting pressure control system, with gas ring vacuum pump combination, air gas transmission connecting pipe road, buffer container, pneumatic flowrate regulating valve, pressure transmitter and pneumatic on-off valve, wherein, gas ring vacuum pump is combined as source of the gas and occurs equipment, including 1 or many gas ring vacuum pumps, the air inlet of each gas ring vacuum pump is connected by air gas transmission connecting pipe road with buffer container, and the gas outlet of each gas ring vacuum pump is connected to discharge pipe by air gas transmission connecting pipe road；Pneumatic on-off valve, pressure transmitter and pneumatic flowrate regulating valve are located at the air inlet header side that gas ring vacuum pump is combined.The vacuum holding power of system when the utility model improves device detection, and reduce the critical backing pressure ratio of nozzle (compared to without under this mode control condition), improve the applicability of device and the reliability of testing result, science, the validity and reliability of device verification result are improved simultaneously, it is simple in construction, processing technology is succinct, is easy to safeguard, convenient to disassembly.
Description
Technical field
The utility model is related to a kind of control pressurer system, specifically gas flow standard device vacuum source limit pressure
Force control system.
Background technology
Sonic Nozzle Gas Flow Standard Device belongs to Flow Standard Device With Standard Meter Method category, because of gas ring vacuum pump volume
Small, equipment pipeline flowing is succinct, simply by entering outlet pipe connection, is followed without hydrologic cycle cooling system, oil circuit cooling water
Other accessory systems such as loop system and equipment, floor space are small, and noise and vibration is small, the puzzlement of no exhaust emission, energy-conserving and environment-protective, it is deep by
Professional praises highly.
Gas ring vacuum pump end vacuum total pressure head is 300~650mbar of Δ, and being characterized in can only be no more than end vacuum
The calibrating of device is realized under working condition, otherwise can be by the burn-down of electric motor of pump, therefore also it is restricted the detection capability of device.
And for Sonic Nozzle Gas Flow Standard Device, it has to reach that critical pressure ratio could start calibrating when testing,
And back pressure ratio (P2/P0, P2 are Nozzle exit static pressure power, and P0 is nozzle upstream stagnation pressure) will also reach controllable minimum
(being typically not less than 0.65).The back pressure that can be extracted into after nozzle reaches critical pressure ratio for device than more low better,
And compared with the vacuum source of other forms, the vacuum that gaseous ring pump can reach is minimum, back pressure is than maximum.I.e. in nozzle also
When being not reaching to the required value of preferable back pressure ratio (close to nozzle certificate back pressure ratio), gas ring vacuum pump has reached vacuum limit
It is worth and cisco unity malfunction, is discontented with the normal test condition demand of foot unit.
At present, domestic user is general place is small and condition relatively near from office or residential block and that investment allows
Under pay the utmost attention to selection gas ring vacuum pump as gas source feed.For these reasons, user think selection gas ring vacuum pump be
Often produced during Sonic Nozzle Gas Flow Standard Device source of the gas some misgivings, have even because to its practical situations not
Understand very much and have selected the source of the gas of other forms, wait device just to find that actual result is very undesirable after building up, that is, waste place again
The energy is wasted, noise and vibration and exhaust emission are also very serious.
Utility model content
For Sonic Nozzle Gas Flow Standard Device gas ring vacuum pump in the prior art as air supply system due to discontented
, there is the small grade deficiency of application scope, problem to be solved in the utility model is to carry in the normal test condition demand of foot unit
For a kind of effective gas flow standard device vacuum source limiting pressure control system.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
The utility model gas flow standard device vacuum source limiting pressure control system, with gas ring vacuum pump group
Conjunction, air gas transmission connecting pipe road, buffer container, pneumatic flowrate regulating valve, pressure transmitter and pneumatic on-off valve, wherein, gas
Ring vacuum pump is combined as source of the gas and occurs equipment, including 1 or many gas ring vacuum pumps, and the air inlet of each gas ring vacuum pump passes through sky
Gas gas transmission connecting pipe road is connected with buffer container, and the gas outlet of each gas ring vacuum pump is connected to discharge by air gas transmission connecting pipe road
Pipeline；Pneumatic on-off valve, pressure transmitter and pneumatic flowrate regulating valve are located at the air inlet header side that gas ring vacuum pump is combined.
Gas ring vacuum pump combination, which includes 2~6, is used for the gas ring vacuum pump of Sonic Nozzle Gas Flow Standard Device, respectively
Combined by pressure difference △ P=300~650mbar and pressure difference △ P=300~440mbar vavuum pump, each pump is by entering branch
Pipe is connected in parallel on air inlet header.
Pressure difference △ P=300~650mbar pump inspection 64m3/ and following rill flow nozzle, pressure difference △ P=300~
440mba pump inspection 128m3/ and the big flow nozzle of the above.
Air gas transmission connecting pipe road includes air inlet header, air intake branch and vent header, wherein air inlet header, air inlet branch
Pipe connection gas ring vacuum pump combines air inlet to the buffer container port of export, and vent header connection gas ring vacuum pump combination exhaust mouthful is extremely
All pipelines of the discharge pipe port of export.
Pneumatic on-off valve, pressure transmitter and pneumatic flowrate regulating valve are arranged on air inlet header.
Also there is bypass tonifying Qi pipeline, be connected in series with air inlet header.
The utility model has the advantages that and advantage：
The vacuum holding power of system when 1. the utility model improves device detection, and reduce the critical backing pressure of nozzle
Than the applicability of device and the reliability of testing result being improved, while improving the science of device verification result, validity
And reliability.
2. the utility model is simple in construction, processing technology is succinct, is easy to safeguard, convenient to disassembly.
3. the utility model need not increase too many expense, reduce live peace to device global design cost impact less
Technical process is filled, compared to saving certain corollary equipment and installation expense for the source of the gas configuration of other forms.
4. the utility model can create preferable economic benefit and social benefit, and its energy-conserving and environment-protective effect is ratio
More prominent, it is worth in instrument and meter industry wideling popularize application.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Wherein, 1 is the first muffler, and 2 be first gas ring vavuum pump, and 3 be second gas ring vavuum pump, and 4 be that the 3rd compression ring is true
Empty pump, 5 be the 4th gas ring vacuum pump, and 6 be the 5th gas ring vacuum pump, and 7 be vent header, and 8 be pneumatic on-off valve, and 9 hold for buffering
Device, 10 be pressure transmitter, and 11 be air intake branch, and 12 be air inlet header, and 13 be pneumatic flowrate regulating valve, and 14 be the second noise reduction
Device.
Embodiment
The utility model is further elaborated with reference to Figure of description.
As shown in figure 1, the utility model gas flow standard device vacuum source limiting pressure control system, with it is high,
The combination of rough vacuum gas ring vacuum pump, air gas transmission connecting pipe road, buffer container 9, pneumatic flowrate regulating valve 13, pressure transmitter
10 and pneumatic on-off valve 8, wherein, gas ring vacuum pump is combined as source of the gas and occurs equipment, including 1 or many gas ring vacuum pumps,
The air inlet of each gas ring vacuum pump is connected by air gas transmission connecting pipe road with buffer container 9, the gas outlet of each gas ring vacuum pump
Discharge pipe (i.e. vent header 7) is connected to by air gas transmission connecting pipe road；Pneumatic on-off valve 8, pressure transmitter 10 and gas
Dynamic flow control valve 13 is located at the side of air inlet header 12 that gas ring vacuum pump is combined.
Air gas transmission connecting pipe road includes air inlet header 12, air intake branch 11 and vent header 7, wherein air inlet header
12nd, the connection of air intake branch 11 gas ring vacuum pump combines air inlet to the buffer container port of export, including bypass tonifying Qi pipeline.Exhaust converges
Pipe 7 connects gas ring vacuum pump combination exhaust mouthful to all pipelines of the discharge pipe port of export.Pneumatic on-off valve 8, pressure transmitter
10 and pneumatic flowrate regulating valve 13 be installed on the air inlet header 12 on air gas transmission connecting pipe road.
Gas ring vacuum pump combination includes 2~6 gas ring vacuum pumps, and (the present embodiment is 5, i.e. the first~five gas ring vacuum pump
2~6), and combined respectively by pressure difference △ P=300~650mbar and pressure difference △ P=300~440mbar vavuum pump, it is each true
Empty pump into branch pipe by being connected in parallel on air inlet header.Pressure difference △ P=300~650mbar pump examines 64m3/ and following
Rill flow nozzle, pressure difference △ P=300~440mba pump inspection 128m3/ and the big flow nozzle of the above.
The air gas transmission connecting pipe road is that connection air-inlet of vacuum pump to the buffer container port of export and pump exhaust inlet are extremely arranged
All pipelines at tube outlet end are put, include air inlet header, the air intake branch of vacuum pump inlet side, the exhaust of vacuum pump outlet side
Header and exhaust branch pipe and bypass tonifying Qi pipeline (the air inlet header side for being located at pump).
Pressure transmitter 1, pneumatic on-off valve 8 are installed on vavuum pump air inlet header, by observing pressure value, by computer
Vacuum before remote interlocking control vavuum pump, is the safeguard procedures in order to prevent gas ring vacuum pump superpressure from running and take.
Pneumatic flowrate regulating valve 13 is installed on gas ring vacuum pump air inlet header, is super to closing in pump operation in order to ensure
Press the limit, and the remedial measure that device is taken when not reaching selected nozzle back pressure also than requiring, also in gaseous ring pump
Still ensure that device is continuously run under the exhaust capacity that reaches capacity, maximum plays effect of gas ring vacuum pump, complete test job.
The utility model can improve the vacuum holding power when device is detected and reduce the back pressure ratio of nozzle, improve dress
The applicability and the reliability of testing result put.The accuracy of tested flowmeter is increased, increase the measurement device result
Confidence level, can create preferable economic benefit and social benefit, and its energy-conserving and environment-protective effect is than more prominent, value
Obtain and application is widelyd popularize in instrument and meter industry.
Claims (6)
1. gas flow standard device vacuum source limiting pressure control system, it is characterised in that：Combined with gas ring vacuum pump,
Air gas transmission connecting pipe road, buffer container, pneumatic flowrate regulating valve, pressure transmitter and pneumatic on-off valve, wherein, compression ring is true
Empty pump group is combined into source of the gas and occurs equipment, including 1 or many gas ring vacuum pumps, and the air inlet of each gas ring vacuum pump is defeated by air
Gas connecting line is connected with buffer container, and the gas outlet of each gas ring vacuum pump is connected to delivery pipe by air gas transmission connecting pipe road
Road；Pneumatic on-off valve, pressure transmitter and pneumatic flowrate regulating valve are located at the air inlet header side that gas ring vacuum pump is combined.
2. the gas flow standard device vacuum source limiting pressure control system as described in claim 1, it is characterised in that：Gas
Ring vacuum pump combination include 2~6 gas ring vacuum pumps, respectively by pressure difference △ P=300~650mbar and pressure difference △ P=300~
440mbar vavuum pump is combined, and each pump into branch pipe by being connected in parallel on air inlet header.
3. the gas flow standard device vacuum source limiting pressure control system as described in claim 2, it is characterised in that：Pressure
Poor △ P=300~650mbar pump inspection 64m3/ and following rill flow nozzle, pressure difference △ P=300~440mba pump inspection
128m3/ and the above big flow nozzle.
4. the gas flow standard device vacuum source limiting pressure control system as described in claim 1, it is characterised in that：It is empty
Gas gas transmission connecting pipe road includes air inlet header, air intake branch and vent header, wherein air inlet header, air intake branch connection compression ring
Vavuum pump combines air inlet to the buffer container port of export, and vent header connection gas ring vacuum pump combination exhaust mouthful to discharge pipe goes out
All pipelines at mouth end.
5. the gas flow standard device vacuum source limiting pressure control system as described in claim 1, it is characterised in that：Gas
Dynamic switch valve, pressure transmitter and pneumatic flowrate regulating valve are arranged on air inlet header.
6. the gas flow standard device vacuum source limiting pressure control system as described in claim 1, it is characterised in that：Also
With bypass tonifying Qi pipeline, it is connected in series with air inlet header.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621277794.7U CN206420537U (en) | 2016-11-26 | 2016-11-26 | Gas flow standard device vacuum source limiting pressure control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621277794.7U CN206420537U (en) | 2016-11-26 | 2016-11-26 | Gas flow standard device vacuum source limiting pressure control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206420537U true CN206420537U (en) | 2017-08-18 |
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ID=59577792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621277794.7U Active CN206420537U (en) | 2016-11-26 | 2016-11-26 | Gas flow standard device vacuum source limiting pressure control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112871222A (en) * | 2021-01-20 | 2021-06-01 | 美科仪器仪表校准技术服务(无锡)有限公司 | Portable automatic vacuum test bench |
-
2016
- 2016-11-26 CN CN201621277794.7U patent/CN206420537U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112871222A (en) * | 2021-01-20 | 2021-06-01 | 美科仪器仪表校准技术服务(无锡)有限公司 | Portable automatic vacuum test bench |
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