CN204630622U - A kind of critical speed flowmeters amount system - Google Patents
A kind of critical speed flowmeters amount system Download PDFInfo
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- CN204630622U CN204630622U CN201520183985.6U CN201520183985U CN204630622U CN 204630622 U CN204630622 U CN 204630622U CN 201520183985 U CN201520183985 U CN 201520183985U CN 204630622 U CN204630622 U CN 204630622U
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- Prior art keywords
- orifice plate
- data acquisition
- valve body
- temperature sensor
- acquisition module
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Abstract
The utility model discloses a kind of critical speed flowmeters amount system, comprise throttle mechanism and data acquisition measuring mechanism, described throttle mechanism comprises valve body and is arranged on the orifice plate in valve body, described data acquisition measuring mechanism comprises PC, control box, temperature sensor and two pressure units, described temperature sensor and two pressure units are all fixed on valve body, and one of them pressure unit is positioned at the downstream of orifice plate, another pressure unit and temperature sensor are positioned at the upstream side of orifice plate; Be provided with data acquisition module and communication module in described control box, described temperature sensor is all connected with data acquisition module with two pressure units, and the data collected are passed to PC by communication module by described data acquisition module.The utility model can according to the data gathered automatically and exactly Quick Measuring measure the flow of fluid when critical velocity, achieve the object of data acquisition, transmission and metering integrated.
Description
Technical field
The utility model relates to a kind of measurement of fluid flow field, particularly relates to a kind of critical speed flowmeters amount system, is mainly used in the flow metering of critical velocity in the flow rate test processes such as rock gas mine and new well.
Background technology
Natural gas flow produces throttling through orifice plate, as upstream pressure P
1be greater than downstream pressure P
2about one times, i.e. P
2≤ 0.546 P
1time, reach critical gas flows.When critical gas flows, the minimum place of flow velocity section, the flow velocity of rock gas equals the velocity of sound of rock gas at this place's temperature.Now, reduce orifice plate outlet ambient pressure further, at all can not cause the increase of gas output, and increase upstream pressure, though the flow velocity at the minimum place of section does not increase, density can be made to increase airshed to be increased.Illustrate that gas flow and downstream pressure have nothing to do, only depend on upstream pressure.Therefore, the pressure before orifice plate is utilized to calculate gas flow.
Existing technology adopts critical speed flowmeters to measure gas discharge during critical velocity, the prior art being " 200720187244.0 " as China Patent No. also discloses a kind of critical speed flowmeters on November 5th, 2008, its technical scheme is that described a kind of critical speed flowmeters is made up of orifice throttle structure and data acquisition measurement structure two parts, is combined formed orifice throttle structure by orifice plate, orifice plate support, orifice plate room, sealing clamp, bearing plate, sealing offset plate, structure is measured by measurement straight tube, pressure tapping, the collection of thermometer joint composition data, it is characterized in that: orifice plate room is positioned in the middle of orifice plate support, it is a footpath upward opening, in be the slot type structure of lower narrow wide three layers, orifice plate support bottom connects a short tube, short tube is communicated with by the narrow groove of orifice plate room lower floor with orifice plate room, orifice plate radial direction gear is in the middle of short tube, successively by the sealing offset plate being positioned at orifice plate indoor, sealing clamp, bearing plate, screw, the narrow groove of lower floor that short tube is communicated with orifice plate room by jackscrew seals, pressure tapping, thermometer joint is placed in two and measures on straight tube, measure the two ends that straight tube is connected to short tube for two, centre is sealed by straight tube sealing gasket.But this patent, when digitizing collects relevant pressure data and temperature data automatically, needs artificial calculated flow rate, there is the shortcoming that counting yield is low, result of calculation accuracy is low and hand labor intensity is large.
Utility model content
The purpose of this utility model is to overcome the above-mentioned problems in the prior art, a kind of critical speed flowmeters amount system is provided, the utility model can according to the data gathered automatically and exactly Quick Measuring measure the flow of fluid when critical velocity, achieve the object of data acquisition, transmission and metering integrated.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of critical speed flowmeters amount system, it is characterized in that: comprise throttle mechanism and data acquisition measuring mechanism, described throttle mechanism comprises valve body and is arranged on the orifice plate in valve body, described data acquisition measuring mechanism comprises PC, control box, temperature sensor and two pressure units, described temperature sensor and two pressure units are all fixed on valve body, and one of them pressure unit is positioned at the downstream of orifice plate, another pressure unit and temperature sensor are positioned at the upstream side of orifice plate; Be provided with data acquisition module and communication module in described control box, described temperature sensor is all connected with data acquisition module with two pressure units, and the data collected are passed to PC by communication module by described data acquisition module.
Also be provided with safety barrier in described control box, described temperature sensor is all connected with data acquisition module by safety barrier with two pressure units.
The quantity of described safety barrier is three, and described temperature sensor is connected with data acquisition module respectively by three safety barriers with two pressure units.
Described throttle mechanism also comprises top board, pressing plate and rain cover, described valve body offers slot, described orifice plate is arranged in valve body by slot, described pressing plate and top board are fixed on the valve body above orifice plate successively, pressing plate coordinates fixing orifice plate with top board, described rain cover is fixed on valve body, and top board and pressing plate are all positioned at rain cover.
The pressure unit of described orifice plate upstream side is identical with the diameter of the pipeline of conveying fluid to the distance of orifice plate, and the pressure unit in described orifice plate downstream is identical with the radius of the pipeline of conveying fluid to the distance of orifice plate.
Employing the utility model has the advantage of:
One, the utility model is by the cooperation of PC, data acquisition module, pressure unit and the temperature sensor in data acquisition measuring mechanism, can according to the data gathered automatically and exactly Quick Measuring measure the flow of fluid when critical velocity, achieve the object of data acquisition, transmission and metering integrated, be conducive to, under the prerequisite reducing hand labor intensity, improving measurement efficiency and metering accuracy.And, the data that pressure unit and temperature sensor gather each time and each metric results can both show in real time, store on PC, both be conducive to setting up various database and form, be conducive to again people and change orifice plate at any time according to uninterrupted, thus make the conveying of fluid reach optimum condition.
Two, in the utility model, because temperature sensor and pressure unit are all fixed on the valve body at natural gas transport scene, field condition is comparatively dangerous, therefore safety barrier is set at data acquisition module and between temperature sensor and data acquisition module, the stable transfer of signal can either be ensured, can not security incident be caused again, improve safety in utilization.
Three, in the utility model, temperature sensor is connected with data acquisition module respectively by three safety barriers with two pressure units, can improve safety in utilization further.
Four, in the utility model, coordinate fixing orifice plate by pressing plate with top board, can either prevent orifice plate from loosening, be conducive to again the Fast Installation dismounting of orifice plate, the experiment proved that, after adopting this structure, only need the replacing that just can complete orifice plate for 3 ~ 5 minutes consuming time, and do not need the entirety dismantling valve body.Can prevent extraneous rainwater or dust etc. from entering valve inner from the gap between top board and valve body by rain cover, decrease the impact of external environment on valve body, be conducive to the serviceable life of improving valve body.
Five, in the utility model, the pressure unit of orifice plate upstream side is identical with the diameter of the pipeline of conveying fluid to the distance of orifice plate, the pressure unit in orifice plate downstream is identical with the radius of the pipeline of conveying fluid to the distance of orifice plate, adopt and arrange like this, can, without the need to changing efflux coefficient, be conducive to improving measurement efficiency when in use changing the orifice plate of different throttle diameter.
Six, utility model point of the present utility model is data acquisition measuring mechanism to be combined with throttle mechanism, employing system integration designs, a complete set of system integrates the functions such as data acquisition, flow rate calculation, data storage management, not only there is the function of running parameter input, amendment, inquiry, field working conditions data query and daily paper, monthly magazine data base querying, also there is sound and light of alarm during the tested value amount of transfiniting; The flow of fluid when critical velocity can be measured quickly and accurately, achieve the object of data acquisition, transmission and metering integrated.
The production of the equipment seven, in the utility model, assembling and debugging all complete in factory, fluid upstream and downstream pipeline flange only need be connected with valve body by user, connect corresponding data line again and cable can put into operation, be convenient to in-site installation, migration, on-site installation work amount is few, short construction period.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Be labeled as in figure: 1, PC, 2, control box, 3, pressure unit, 5, temperature sensor, 6, throttle mechanism, 7, data acquisition module, 8, safety barrier, 9, communication module.
Embodiment
Embodiment 1
A kind of critical speed flowmeters amount system, comprise throttle mechanism 6 and data acquisition measuring mechanism, described throttle mechanism 6 comprises valve body and is arranged on the orifice plate in valve body, described data acquisition measuring mechanism comprises PC 1, control box 2, temperature sensor 5 and two pressure units 3, described temperature sensor 5 and two pressure units 3 are all fixed on valve body, and one of them pressure unit 3 is positioned at the downstream of orifice plate, another pressure unit 3 and temperature sensor 5 are positioned at the upstream side of orifice plate; Data acquisition module 7 and communication module 9 is provided with in described control box 2, described temperature sensor 5 is all connected with data acquisition module 7 with two pressure units 3, and the data collected are passed to PC 1 through the RS-485 of standard and RS-232 interface by communication module 9 by described data acquisition module 7.
In the present embodiment, described control box 2 is lightning protection explosion-proof control box 2.
In the present embodiment, be also provided with safety barrier 8 in described control box 2, described temperature sensor 5 is all connected with data acquisition module 7 by safety barrier 8 with two pressure units 3.Wherein, the effect of safety barrier 8 is explosive areas (non-intrinsically safe safety) beyond control box 2 and between the place of safety (non-intrinsically safe safety) in control box 2 during bi-directional electric signal, avoid causing spark, and the place of safety caused because of fault can be limited pass on to the energy in explosive area.
Further, the quantity of described safety barrier 8 is three, and described temperature sensor 5 is connected with data acquisition module 7 respectively by three safety barriers 8 with two pressure units 3.
In the present embodiment, described throttle mechanism 6 also comprises top board, pressing plate and rain cover, described valve body offers slot, described orifice plate is arranged in valve body by slot, described pressing plate and top board are fixed on the valve body above orifice plate successively, and top board is bolted on valve body, and pressing plate coordinates fixing orifice plate with top board, described rain cover is fixed on valve body, and top board and pressing plate are all positioned at rain cover.
In the present embodiment, described safety barrier 8 is Intelligent isolation type safety grid 8, and its model is NPEXA-31P, and supply voltage is 24VDC, and the response time is 0.2ms, and input signal is 4-20mA, and output signal is 4-20mA, and working temperature is-10 DEG C-5 DEG C.
Embodiment 2
A kind of critical speed flowmeters amount system, comprise throttle mechanism 6 and data acquisition measuring mechanism, described throttle mechanism 6 comprises valve body and is arranged on the orifice plate in valve body, described data acquisition measuring mechanism comprises PC 1, control box 2, temperature sensor 5 and two pressure units 3, described temperature sensor 5 and two pressure units 3 are all fixed on valve body, and one of them pressure unit 3 is positioned at the downstream of orifice plate, another pressure unit 3 and temperature sensor 5 are positioned at the upstream side of orifice plate; Data acquisition module 7 and communication module 9 is provided with in described control box 2, described temperature sensor 5 is all connected with data acquisition module 7 with two pressure units 3, and the data collected are passed to PC 1 through the RS-485 of standard and RS-232 interface by communication module 9 by described data acquisition module 7.
In the present embodiment, the pressure unit 3 of described orifice plate upstream side is identical with the diameter of the pipeline of conveying fluid to the distance of orifice plate, and the pressure unit 3 in described orifice plate downstream is identical with the radius of the pipeline of conveying fluid to the distance of orifice plate.Wherein, the diameter of the pipeline of conveying fluid and radius are respectively diameter and the radius of circulation passage, are namely respectively in pipeline.
Apply AC 1.5kV voltage industrial frequency AC in the utility model between live part and non-live part, keep 60s flicker free, do not puncture.
Valve body in the utility model adopts integral cast steel structure, and two ends and pipeline adopt the Flange joint of API standard.Compare original technology, no one pad of the device of this integral structure, decrease unnecessary leakage hidden danger, seal more reliable.Further, adopt the structure of Flange joint, do not need specific purpose tool when mounted with pipeline, later maintenance dismounting is convenient.Flange sealing surface adopts the hard sealing of API substandard BX or R series metal ring pad, is particularly useful for the gasser station under the bad working environments such as high pressure, high temperature difference environment.
Because the measuring principle of critical speed flowmeters calculates flow by the pressure differential between orifice plate upstream extremity and downstream end in the utility model, if the circulation passage of orifice plate rims and fluid does not have positiver sealing, detected fluid all can not flow to downstream by orifice plate throttle orifice, affect measuring accuracy.And orifice plate of the present utility model adopts double sealing structure, then solve the problems referred to above well, concrete structure is: be provided with stainless steel seal valve seat with orifice plate contact portion in valve body, seal valve seat and valve body adopt disposable finishing to form, ensure that the valve seat both sides depth of parallelism is better, guarantee seal valve seat and pore plate by sealing circle both sides end face close contact, upstream fluid by during orifice plate except throttle orifice upstream and downstream cut off completely, thus ensure that measuring accuracy and orifice flow count repeatable characteristic.
In the utility model, measuring accuracy is affected because orifice plate is same with the coaxiality error of circulation duct, therefore the utility model adopts upper location and side location structure to locate orifice plate, specific as follows: upper location is that consistance that is high by valve axis center and the high-accuracy processing dimension in orifice plate seat center ensures, location, side is that the register pin of passing hole plate valve seat and pressing plate and the register pin of pressing plate and valve body carry out dual guarantee.The great advantage of this structural design is, after repeated disassembled and assembled, still can ensure the right alignment of orifice plate and circulation duct, improves the repeatability of continuous data further.
Concrete metering process of the present utility model is: the temperature sensor 5 of orifice plate upstream and the pressure transducer of orifice plate upstream and downstream collect fluid by time pressure and temperature 4 ~ 20mA current signal after, the safety barrier 8 in control box 2 is inputed to by sheathed cable line, after carrying out corresponding lightning-arrest and isolation, then pass to PC 1 by communication module 9 after converting these signals to digital signal by data acquisition module 7.PC 1 pair of gas discharge carries out high-precision real time measure and flow accumulation, thus realizes the management function such as display, storage, statistics, inquiry of continuous data.
Claims (5)
1. a critical speed flowmeters amount system, it is characterized in that: comprise throttle mechanism (6) and data acquisition measuring mechanism, described throttle mechanism (6) comprises valve body and is arranged on the orifice plate in valve body, described data acquisition measuring mechanism comprises PC (1), control box (2), temperature sensor (5) and two pressure units (3), described temperature sensor (5) and two pressure units (3) are all fixed on valve body, and one of them pressure unit (3) is positioned at the downstream of orifice plate, another pressure unit (3) and temperature sensor (5) are positioned at the upstream side of orifice plate, data acquisition module (7) and communication module (9) is provided with in described control box (2), described temperature sensor (5) is all connected with data acquisition module (7) with two pressure units (3), and the data collected are passed to PC (1) by communication module (9) by described data acquisition module (7).
2. a kind of critical speed flowmeters amount system as claimed in claim 1, it is characterized in that: be also provided with safety barrier (8) in described control box (2), described temperature sensor (5) is all connected with data acquisition module (7) by safety barrier (8) with two pressure units (3).
3. a kind of critical speed flowmeters amount system as claimed in claim 2, it is characterized in that: the quantity of described safety barrier (8) is three, described temperature sensor (5) is connected with data acquisition module (7) respectively by three safety barriers (8) with two pressure units (3).
4. a kind of critical speed flowmeters amount system as claimed in claim 1, it is characterized in that: described throttle mechanism (6) also comprises top board, pressing plate and rain cover, described valve body offers slot, described orifice plate is arranged in valve body by slot, described pressing plate and top board are fixed on the valve body above orifice plate successively, pressing plate coordinates fixing orifice plate with top board, described rain cover is fixed on valve body, and top board and pressing plate are all positioned at rain cover.
5. a kind of critical speed flowmeters amount system according to any one of claim 1-4, it is characterized in that: the pressure unit (3) of described orifice plate upstream side is identical with the diameter of the pipeline of conveying fluid to the distance of orifice plate, the pressure unit (3) in described orifice plate downstream is identical with the radius of the pipeline of conveying fluid to the distance of orifice plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520183985.6U CN204630622U (en) | 2015-03-30 | 2015-03-30 | A kind of critical speed flowmeters amount system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520183985.6U CN204630622U (en) | 2015-03-30 | 2015-03-30 | A kind of critical speed flowmeters amount system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204630622U true CN204630622U (en) | 2015-09-09 |
Family
ID=54049639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520183985.6U Expired - Fee Related CN204630622U (en) | 2015-03-30 | 2015-03-30 | A kind of critical speed flowmeters amount system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204630622U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713603A (en) * | 2015-03-30 | 2015-06-17 | 德阳市迪信佳阀门制造有限公司 | Critical speed flow metering system |
| CN110219623A (en) * | 2019-07-21 | 2019-09-10 | 中石化石油工程技术服务有限公司 | A kind of branch line flow distribution device and its metering method |
| CN114704947A (en) * | 2022-03-31 | 2022-07-05 | 唐山同海净化设备有限公司 | Air volume adjusting valve capable of accurately measuring air volume |
-
2015
- 2015-03-30 CN CN201520183985.6U patent/CN204630622U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713603A (en) * | 2015-03-30 | 2015-06-17 | 德阳市迪信佳阀门制造有限公司 | Critical speed flow metering system |
| CN104713603B (en) * | 2015-03-30 | 2018-03-13 | 德阳市迪信佳阀门制造有限公司 | Critical speed flowmeters amount system |
| CN110219623A (en) * | 2019-07-21 | 2019-09-10 | 中石化石油工程技术服务有限公司 | A kind of branch line flow distribution device and its metering method |
| CN110219623B (en) * | 2019-07-21 | 2023-06-20 | 中石化石油工程技术服务有限公司 | Branch pipeline flow distribution device and metering method thereof |
| CN114704947A (en) * | 2022-03-31 | 2022-07-05 | 唐山同海净化设备有限公司 | Air volume adjusting valve capable of accurately measuring air volume |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 Termination date: 20190330 |