CN205403911U - A commutator for gas flow standard device - Google Patents
A commutator for gas flow standard device Download PDFInfo
- Publication number
- CN205403911U CN205403911U CN201620169206.1U CN201620169206U CN205403911U CN 205403911 U CN205403911 U CN 205403911U CN 201620169206 U CN201620169206 U CN 201620169206U CN 205403911 U CN205403911 U CN 205403911U
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- China
- Prior art keywords
- seal
- diverter
- port
- commutator
- gas flow
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Abstract
The utility model discloses a commutator for gas flow standard device, it is including the first port that is located the side of admitting air, second port with bypass export intercommunication, the third port of being connected with the volumetric standard, first seal port, second seal port and third seal port have on the main part passageway of commutator be provided with a valve rod in the commutator be provided with the gasket on the valve rod. This novel commutator is applicable to the simple standard device of gas flow, can carry out offsetting of additional mass through this commutator, has realized that standard device uncertainty horizontally is showing to improve.
Description
Technical field
This utility model the invention belongs to detection of gas flow rate field, particularly relates to a kind of diverter for gas flow standard device.
Background technology
As the simple standard set-up of gas flow, " malleation inflow formula " gas flow standard device becomes one of preferred plan of setting up mass method and the simple standard set-up of volumetric method gas flow with its cost and technical advantage；Especially in the simple device of high-pressure gas flow, this advantage becomes apparent from.Additional volume, the volume of the pipeline portions being namely connected with volumetric standard, additional mass is additional volume in the forward and backward mass change of air inlet, and its impact is important that such device uncertainty affects in component.
When adopting PPCM gas standard device normalization critical flow nozzle or gas flow instrument, flowing through the gas being calibrated part and enter the volumetric standard of cut-off valve isolation, the volume of this portion gas or quality can by accurate measurements；But in additional volume, the pressure of gas, temperature, volume and quality are then difficult to accurately be measured, and reason is: additional volume normally shape is complicated, it is difficult to accurately determine by physical dimension measuring method；When plant running is when high pressure conditions, the volume of volumetric standard or weighing container is often less, and now additional volume accounts for the proportion increase in total measurement (volume), and additional mass impact is very important；Therefore, lower the impact that additional volume brings is the emphasis paid close attention at present as far as possible.
Summary of the invention
The purpose of this utility model is to provide a kind of Novel commutator for gas flow standard device, realize additional mass by this diverter to offset, reduce the additional mass impact on uncertainty of measurement, make the uncertainty degree that additional mass produces can ignore or be cancelled, and then be obviously improved the overall uncertainty of gas flow standard device.
This utility model provides a kind of diverter for gas flow standard device, it the first port including being positioned at air inlet side；The second port connected with bypass outlet；The 3rd port being connected with volumetric standard；The body passageways of described diverter has the first seal, the second seal and the 3rd seal, described diverter is provided with a valve rod, described valve rod is provided with diaphragm seal.
Wherein, described first seal and the second seal lay respectively at the both sides of body passageways corresponding below the first port.
Wherein, one end of described valve rod is connected to driving cylinder, and the other end of valve rod connects grating signalling generator.
Wherein, between described first seal and the second seal, it is provided with the first diaphragm seal.
Wherein, the second diaphragm seal and the 3rd diaphragm seal position it are respectively arranged with in the both sides of the 3rd seal.
This Novel commutator is applicable to the simple standard set-up of gas flow, can be carried out the counteracting of additional mass by this diverter, it is achieved that significantly improving of standard set-up uncertainty level.
Accompanying drawing explanation
The structural representation of Fig. 1 gas flow standard device of the present utility model；
Fig. 2 is the first status architecture schematic diagram of diverter of the present utility model；
Fig. 3 is the second status architecture schematic diagram of diverter of the present utility model；
Fig. 4 is the third state structural representation of diverter of the present utility model.
Detailed description of the invention
For the ease of understanding this utility model, below in conjunction with accompanying drawing, embodiment of the present utility model is illustrated, it will be appreciated by those skilled in the art that following explanation only to facilitate utility model is made an explanation, not as the concrete restriction to its scope.
It is illustrated in figure 1 the structural representation of gas flow standard device.For gas flow meter, described device have for carrying out the source of the gas detected, source of the gas can be carried out on-off control by stop valve 1, in the side of stop valve 1, there is critical flow nozzle 3, as further preferred version, the effusion meter 2 of calibrating can be arranged to, naturally it is also possible to be not provided with described effusion meter 2 between described stop valve 1 and described critical flow nozzle 3.Described critical flow nozzle 3 is by pipeline or other connection members or is directly connected with the first air valve V1 and the second air valve V2, volume between described critical flow nozzle 3 and the first air valve V1, the second air valve V2 is additional volume 9, described first air valve V1 connects with bypass outlet, can be provided with temperature sensor Ti and pressure transducer Pi between described critical flow nozzle 3 and described second air valve V2；Described second air valve V2 is connected with volumetric standard 5 by snap joint 4, wherein said volumetric standard 5 can also be weighing container, described volumetric standard 5 is connected to measurement the temperature sensor Ts of its content temperature and pressure, pressure transducer Ps, described volumetric standard 5 has farther included gas outlet, this gas outlet is connected with vacuum pump 8, can be provided with vacuum valve 6 and snap joint 7 between described gas outlet and vacuum pump 8.
In calibration process, first, open vacuum pump 8, control the unlatching of vacuum valve and snap joint 7, vacuum pump 8 is relied on to be extracted out by the air in volumetric standard 5, when vacuum pump 8 carries out extracting air, described first air valve V1 and described second air valve V2 is in closed mode, by temperature sensor Ts and pressure transducer Ps, the pressure and temperature in volumetric standard is measured, after the pressure and temperature in volumetric standard reaches predetermined value, closing control vacuum valve 6 and snap joint 7, close vacuum pump 8 afterwards.When demarcating beginning, the upstream of described critical flow nozzle 3 connects with source of the gas, opens described first air valve V1, sets up suitable flow in nozzle；Then described first air valve V1 closes, and described second air valve V2 opens simultaneously, and gas injects volumetric standard 5.Guarantee that nozzle 3 is in critical state all the time in calibration process, when pressure rises to predetermined value in volumetric standard 5, close described second air valve V2 in order, open described first air valve V1；Should ensure that the moment that volumetric standard 5 does not connect with bypass outlet, namely described first air valve V1 and described second air valve V2 can not be simultaneously in opening.After in stable condition in volumetric standard, again measure the pressure and temperature in container, calculate the clean quality of gas collected in volumetric standard.By calculating the efflux coefficient of nozzle, complete the validation program of nozzle.
Fig. 2 is the structural representation of diverter of the present utility model.Diverter of the present utility model is improved by, and is integrated in a diverter by the first air valve V1 and the second air valve V2, is realized the gating of air valve by the switching of snap switch.As shown in Figure 2, in the side of stop valve 1, there is critical flow nozzle 3, described critical flow nozzle 3 is connected with diverter, this diverter includes three ports, wherein the first port of diverter is connected with described critical flow nozzle 3, second port of diverter connects with bypass outlet, and the 3rd port of diverter is connected with volumetric standard.As shown in Figure 2, the body passageways of described diverter has first seal the 15, second seal the 16, the 3rd seal 17, wherein the first seal 15 and the second seal 16 lay respectively at the both sides of body passageways corresponding below the first port, and described 3rd seal 17 is near the second port of diverter.Being provided with a valve rod 12 in described diverter, one end of described valve rod 12 is connected to driving cylinder 13, and the other end of valve rod 12 connects grating signalling generator 14, and described grating signalling generator 14 transmits photosignal according to the action of valve rod 12.Described driving cylinder 13 and described grating signalling generator 14 lay respectively at the both sides of the body passageways of described diverter.Described valve rod 12 is respectively arranged with the diaphragm seal coordinated with first, second, third seal.Wherein the first diaphragm seal is between the first seal 15 and the second seal 16, and it can carry out coordinating with the first seal 15 or the second seal 16 and realizes opening or closing of passage；Second diaphragm seal and the 3rd diaphragm seal are positioned at the both sides of the 3rd seal 17, described second diaphragm seal or the 3rd diaphragm seal and realization can be coordinated with the 3rd seal respectively to seal, and wherein said second diaphragm seal and the 3rd diaphragm seal can be integral type parts.Valve rod 12 is provided with the spring 11 being connected with above-mentioned diaphragm seal.
In the first state started, when the first air valve V1 and the second air valve V2 is turned off, as in figure 2 it is shown, the first seal 15 is combined with the first diaphragm seal；3rd seal 17 is combined with the 3rd diaphragm seal.
When the second state forming flow, it is necessary to when opening the first valve V1, realize sealing as it is shown on figure 3, the second diaphragm seal and the 3rd seal 17 casees coordinate.
When needing third state when inflating in volumetric standard, as shown in Figure 4, first valve V1 closes, second valve V2 opens, now, under the effect of first diaphragm seal spring on valve rod 12, the first seal 15 position moving to the second seal 16, this first diaphragm seal and the second seal 16 match and realize sealing.
It will be seen that by the end of valve rod 12 under the driving driving cylinder 13, achieve the first air valve and the switch of the second air valve in different positions from Fig. 2 to Fig. 4.
Although it is understood that this utility model discloses as above with preferred embodiment, but above-described embodiment is not limited to this utility model.For any those of ordinary skill in the art, without departing under technical solutions of the utility model ambit, all may utilize the technology contents of the disclosure above and technical solutions of the utility model are made many possible variations and modification, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content without departing from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all still fall within the scope of technical solutions of the utility model protection.
Claims (5)
1. for a diverter for gas flow standard device, it the first port including being positioned at air inlet side；The second port connected with bypass outlet；The 3rd port being connected with volumetric standard；It is characterized in that: there is the first seal, the second seal and the 3rd seal in the body passageways of described diverter, described diverter is provided with a valve rod, described valve rod is provided with diaphragm seal.
2. diverter as claimed in claim 1, it is characterised in that: described first seal and the second seal lay respectively at the both sides of body passageways corresponding below the first port.
3. diverter as claimed in claim 1, it is characterised in that: one end of described valve rod is connected to driving cylinder, and the other end of valve rod connects grating signalling generator.
4. diverter as claimed in claim 1, it is characterised in that: between described first seal and the second seal, it is provided with the first diaphragm seal.
5. diverter as claimed in claim 1, it is characterised in that: the second diaphragm seal and the 3rd diaphragm seal position it is respectively arranged with in the both sides of the 3rd seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620169206.1U CN205403911U (en) | 2016-03-04 | 2016-03-04 | A commutator for gas flow standard device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620169206.1U CN205403911U (en) | 2016-03-04 | 2016-03-04 | A commutator for gas flow standard device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205403911U true CN205403911U (en) | 2016-07-27 |
Family
ID=56444105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620169206.1U Expired - Fee Related CN205403911U (en) | 2016-03-04 | 2016-03-04 | A commutator for gas flow standard device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205403911U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110857875A (en) * | 2018-08-23 | 2020-03-03 | 中国石油天然气股份有限公司 | Quality measuring system for natural gas primary standard device |
-
2016
- 2016-03-04 CN CN201620169206.1U patent/CN205403911U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110857875A (en) * | 2018-08-23 | 2020-03-03 | 中国石油天然气股份有限公司 | Quality measuring system for natural gas primary standard device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160727 Termination date: 20180304 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |