CN100507469C - Expanding volume tube flow measuring device and realizing method - Google Patents
Expanding volume tube flow measuring device and realizing method Download PDFInfo
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- CN100507469C CN100507469C CNB200410052214XA CN200410052214A CN100507469C CN 100507469 C CN100507469 C CN 100507469C CN B200410052214X A CNB200410052214X A CN B200410052214XA CN 200410052214 A CN200410052214 A CN 200410052214A CN 100507469 C CN100507469 C CN 100507469C
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Abstract
The present invention relates to an expanded volume pipe flow metering device. It includes volume pipe self-body; the described volume pipe self-body includes metering cylinder body, piston and lifting valve placed in the cylinder body interior, piston-lifting mechanism and position detector coupled with piston, upstream detection switch and initial downstream detection switch which are fixedly set and an expanded detection switch positioned between upstream detection switch and downstream detection switch. Besides, said invention also provides its working principle and its application rang.
Description
Technical fieldThe present invention relates to flow metering calibrating technology and instrument and meter, particularly change the local measurement reference point and enlarge the device and the implementation method of standard metering parts range.
Background technologyVolume pipe is a kind of novel flow standard parts, particularly little volume volume pipe (Small Volume Provers) is present state-of-the art flow standard parts, insert technology owing to adopt pulse, make it have many advantages such as volume is little, quick to the demarcation of flowmeter, flow range is big, removable, be widely used in joining in-line calibration, container calibrating and the flow standard device etc. of metered flow meter.
Described volume pipe has the above range ratio (maximum flow is than minimum flow) of 1000:1, should be very high, but when being applied to the flow standard device and making flow standard, because the flow standard device need examine and determine the flowmeter of multiple bore and model, the flow range of its requirement is often all greater than the flow range of single volume pipe.In order to expand the flow range of flow standard set-up, often adopt volume pipe to add the standard flowmeter and make the flow working stamndard or directly adopt small one and large one two volume pipe to make standard.No matter adopt which kind of form, consequently increased system cost, increased system complexity, increased occupation of land of device or the like.The overhead of paying for the raising system performance is very big.
According to the application request of described volume pipe, the shortcoming of volume pipe mainly concentrate on its flow range still less than normal on.Though the range ratio of this volume pipe is maximum in all flow measurements and the instrument, ever-increasing application demand requires us further to enlarge its flow range, improves its performance.
Summary of the inventionThe objective of the invention is to propose a kind of technical scheme of range extension, to solve application demand that volume pipe increases day by day contradiction with the flow range deficiency for overcoming above-mentioned the deficiencies in the prior art; Solve the difficult problem in the volume pipe application; Improve the cost performance and the competitive power of volume pipe; Excavate the potentiality of volume pipe, develop into own core technology.
Purpose of the present invention can reach by the following technical solutions:
A kind of expanded type volume pipe flow measurement device comprises the volume pipe body; Described volume pipe body comprises the metering cylinder body, is located at the position probing of interior piston of this cylinder body and lift valve, piston hoisting gear and the axis of the piston interlock, and upstream detection switch S 1 that fixedly installs and initial detected downstream switch S 2; Especially between described detector switch S1 and S2, also be provided with expansion detector switch S3.
A kind of expanded type volume pipe flow metering implementation method is characterized in that:
Expansion detector switch S3 is set between upstream detection switch S 1 and initial detected downstream switch S 2, and following detection step is arranged:
1) begins to demarcate the piston left lateral
2) finish a standard volume operation, piston continues left lateral;
3) hoisting gear starts upward lift block right lateral, piston left lateral;
4) lift block contacts with the piston riser;
5) lift valve is opened, lift block and piston right lateral;
6) lift block and piston right lateral are to top dead centre.
Beneficial effect behind employing the present invention is flow range and a range of application of having expanded volume pipe; Promoted and adopted volume pipe to make the performance of the flow standard device of flow standard; Also expansion adopts volume pipe to make the flow range of the flow standard device of flow standard simultaneously; Reduced and adopted volume pipe to make the cost of the flow standard device of flow standard; Promoted and adopted volume pipe to make the performance of the related application of standard.
Description of drawings
Fig. 1 is the standard configuration figure of core component volume pipe of the present invention;
Fig. 2 is a schematic diagram of the present invention, and wherein standard volume 2 is the standard volumes after improving;
Fig. 3 is specific embodiments synoptic diagram of the present invention;
Fig. 4 is the performing step synoptic diagram of expanded type volume pipe flowmeter of the present invention.
EmbodimentBelow in conjunction with accompanying drawing in detail embodiments of the invention are described in detail.
A kind of expanded type volume pipe flow measurement device comprises the volume pipe body; Described volume pipe body comprises metering cylinder body 2, is located at the position probing 10 of interior piston of this cylinder body and lift valve 3, piston hoisting gear 6 and the axis of the piston interlock, and upstream detection switch S 1 that fixedly installs and initial detected downstream switch S 2; Especially between described detector switch S1 and S2, also be provided with expansion detector switch S3.
The distance of described expansion detector switch S3 and upstream detection switch S 1 be between this upstream detection switch S 1 and the initial detected downstream switch S 3 distance 1/5th.
The distance of described expansion detector switch S3. and upstream detection switch S 1 be between this upstream detection switch S 1 and the initial detected downstream switch S 3 distance 1/10th.
Be provided with switching device shifter between described initial detected downstream switch S 2 and the expansion detector switch S3.
Described switching device shifter can be hand switching device shifter or self-action switching device shifter.
A kind of expanded type volume pipe flow metering implementation method is provided with expansion detector switch S3, and following detection step is arranged between upstream detection switch S 1 and initial detected downstream switch S 2:
1) begins to demarcate the piston left lateral;
2) finish a standard volume operation, piston continues left lateral;
3) hoisting gear starts upward lift block right lateral, piston left lateral;
4) lift block contacts with the piston riser;
5) lift valve is opened, lift block and piston right lateral;
6) lift block and piston right lateral are to top dead centre.
In the practicality, the version of the particularly little volume volume pipe of volume pipe, main structure is as shown in Figure 1.Volume pipe generally all is the hollow piston structure of band lift valve.Volume pipe shown in Figure 1 adopts the chain hoisting gear, and two relative positions are installed by dragging piece on the chain, and chain is by driven by motor, and its standard volume also is the verified volume section volume of corresponding upstream detection switch S 1 and detected downstream switch S 2.
Other volume pipe adopts hydraulic pressure lift and nitrogen assist system in addition, and its standard volume is the verified volume section volume of corresponding upstream detection switch S 1 and detected downstream switch S 2.
As can be seen, the version of this volume pipe is the same basically.
The flow range of volume pipe is meant the flow interval from the minimum flow to the maximum flow that it guarantees precision.Determining of the maximum flow of volume pipe and minimum flow by analyzing and testing and finish.The analysis aspect has the following aspects in main.
Determining of the maximum flow of volume pipe mainly by following factor decision.
The maximum flow of volume pipe is subject to the maximum movement speed of piston;
According to the 4.3.4.3 joint requirement of API 4.3, the maximal rate of volume pipe piston is 1.5m/s, and this rate request mainly is unlikely to cause damages such as piston and detector switch based on the motion of piston component.
The maximum flow of volume pipe is subject in the verification process piston in the working time of upstream detection switch and detected downstream switch;
This condition is based on following 2 points: during the calibrating flowmeter, need to collect enough flowmeter pulse numbers; The precision of the detector switch of volume pipe and repeatability are limited.
The maximum flow of volume pipe is directly proportional with the orthobaric volume of volume pipe; The orthobaric volume of volume pipe is big more, and corresponding metering cylinder diameter is big more, and under identical flow, the movement velocity of piston is slow more.Orthobaric volume is big more, and piston is long more through the time of upstream detection switch and detected downstream switch.Therefore, the maximum flow of volume pipe is directly proportional with the orthobaric volume of volume pipe.
The maximum flow of volume pipe is relevant with the version of volume pipe;
The lifting version of volume pipe is the main factor of flow of having the greatest impact, and when adopting the hydraulic pressure lift mode, the demarcation stroke of piston can be subjected to bigger resistance, thereby has restricted the travelling speed of piston, has reduced the maximum flow of volume pipe.Other aspects comprise that piston structure, encapsulant and form can influence the maximum flow of volume pipe equally.
The minimum flow of volume pipe is mainly by following factor decision.
The minimum flow of volume pipe is subject to the longest run time of demarcating stroke piston; Substantially be exactly the time to the calibrating of flowmeter single the working time of demarcating stroke piston, and this time can not be oversize.If long can reduction the demarcation efficient, can cause the temperature and pressure variation range to exceed the desired limit value of vertification regulation.
The minimum flow of volume pipe is directly proportional with the sealing property of piston component; In general, the sealing property of piston component is good more, and the minimum flow of volume pipe is more little.The minimum flow of volume pipe is directly proportional with the running resistance of piston; The running resistance of piston is more little, and the pressure surge that its convection cell caused is more little, the operation of piston is steady more, more little to the influence of detector switch, thereby the running resistance of piston is more little, and its minimum flow is more little.
The minimum flow of volume pipe is directly proportional with the orthobaric volume of volume pipe; Volume pipe orthobaric volume little, the working time of demarcating stroke piston is just little, its minimum flow is also accordingly little.
The minimum flow of volume pipe is relevant with employed dielectric property.The good greasy property of medium reduces the running resistance of piston, and the high viscosity of medium can reduce leakage rate, and therefore, the minimum flow of volume pipe is correlated with employed dielectric property.
For the flow range of extended volume pipe, the one, can enlarge its maximum flow, the 2nd, can reduce the minimum flow of volume pipe.Consider to enlarge the feasibility of maximum flow first.From the analysis of front as can be known, at a certain concrete volume pipe, the maximum operational speed of its piston and orthobaric volume have been mapped with the maximum flow of its nominal, and its version determines that also it is impossible obviously increasing the volume pipe maximum flow.Therefore the unique method of extended volume pipe flow range is to reduce minimum flow.
In fact, the minimum flow of volume pipe is the most directly related with its orthobaric volume.When orthobaric volume hour, also reduce synchronously the working time of demarcating stroke piston.The method that we will adopt reduces orthobaric volume exactly.For the convenience of representing, we describe with the volume pipe of top Fig. 1 form.
Specific embodiment is seen shown in Figure 4.Between the upstream detection switch S 1 of volume pipe and detected downstream switch S 2, increase a detector switch S3, also form a less verified volume section between S1 and the S3 accordingly.When forbidding S3 work, volume pipe is equal to nothing and does any change, and the maximum flow of volume pipe does not change more precisely; And when forbidding S2 work, the orthobaric volume of volume pipe just has only the part of primary standard volume, and standard volume reduces greatly, thereby has reached the purpose that reduces the volume pipe minimum flow.
The specific embodiment of volume pipe flow expansion as shown in Figure 3.
The enforcement of volume pipe flow expansion is fairly simple, software, control section and structure to volume pipe do not need to do any change, what unique needs were done is to increase a detector switch on the standard detection assembly of volume pipe, disposes a switching signal switching part again, specific as follows:
One. between volume pipe upstream detection switch S 1 and detected downstream switch S 2, increase detector switch S3;
Two .S3 orientate as, and S3 equals S2 to 1/5th of the distance of S1 to the distance of S1.If making the standard volume between corresponding S1 and the S2 is V
S1, the standard volume between corresponding S1 and the S3 is V
S2, then
Three. increase the selection switching device shifter of a detector switch S2 and S3;
Four. corresponding V
S2Volume pipe minimum flow Q
2minEqual corresponding V
S2Volume pipe minimum flow Q
1min1/5th;
Five. the range ratio of general volume pipe is 1000:1, and after the flow expansion, the range ratio of volume pipe has reached 5000:1.
The volume pipe working method is described as follows:
Volume pipe is operated in one of dual mode, promptly makes upstream detection switch, S2 with S1 and makes the orthobaric volume working method of detected downstream switch and make the little orthobaric volume working method that upstream detection switch, S3 are made the detected downstream switch with S1;
S2 and S3 adopt manual or automatic form to switch, and when switching to S2, for the orthobaric volume working method, when switching to S3, are little orthobaric volume working method.
The course of work when adopting the little verified volume section of volume pipe is: when the needs volume pipe is operated in little verified volume section, select S3 to make the detected downstream switch, its course of work as shown in Figure 4.
1) begin to demarcate, piston is (downstream) motion left under the effect of fluid, and lift valve cuts out in the motion process, when the position of piston arrives S1 correspondence, begins to demarcate metering;
2) piston continues operation left, when arriving detected downstream switch S 3, demarcates metering and finishes.
3) piston continues operation left, and the piston hoisting gear starts simultaneously, and the lift block on the hoisting gear moves right, and is opposite with the direction of motion of piston;
4) lift block on the hoisting gear contacts with the piston riser, and piston stops to move left;
5) under the double action of fluid and piston hoisting gear, the lift valve in the piston is opened, whole piston operation to the right under the drive of hoisting gear simultaneously;
6) piston continues operation to the right, and when arriving after top dead center, travel switch S0 moves, and hoisting gear stops, and volume pipe enters next staking-out work process.
Claims (6)
1, a kind of expanded type volume pipe flow measurement device comprises the volume pipe body; Described volume pipe body comprises metering cylinder body (2), is located at the position probing (10) of interior piston of this cylinder body and lift valve (3), piston hoisting gear (6) and the axis of the piston interlock, and upstream detection switch S 1 that fixedly installs and initial detected downstream switch S 2; It is characterized in that:
Between described detector switch S1 and S2, also be provided with expansion detector switch S3, be provided with switching device shifter between described initial detected downstream switch S 2 and the expansion detector switch S3, when switching to S2, for the orthobaric volume working method, when switching to S3, be little orthobaric volume working method.
2, expanded type volume pipe flow measurement device according to claim 1 is characterized in that:
The distance of described expansion detector switch S3 and upstream detection switch S 1 be between this upstream detection switch S 1 and the initial detected downstream switch S 3 distance 1/5th.
3, expanded type volume pipe flow measurement device according to claim 1 is characterized in that:
The distance of described expansion detector switch S3 and upstream detection switch S 1 be between this upstream detection switch S 1 and the initial detected downstream switch S 3 distance 1/10th.
4, expanded type volume pipe flow measurement device according to claim 1 is characterized in that:
Described switching device shifter is the hand switching device shifter.
5, expanded type volume pipe flow measurement device according to claim 1 is characterized in that:
Described switching device shifter is the self-action switching device shifter.
6, a kind of expanded type volume pipe flow metering implementation method is characterized in that:
Expansion detector switch S3 is set between upstream detection switch S 1 and initial detected downstream switch S 2, and following detection step is arranged:
1) begins to demarcate the piston left lateral;
2) finish a standard volume operation, piston continues left lateral;
3) hoisting gear starts upward lift block right lateral, piston left lateral;
4) lift block contacts with the piston riser;
5) lift valve is opened, lift block and piston right lateral;
6) lift block and piston right lateral are to top dead centre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410052214XA CN100507469C (en) | 2004-11-11 | 2004-11-11 | Expanding volume tube flow measuring device and realizing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410052214XA CN100507469C (en) | 2004-11-11 | 2004-11-11 | Expanding volume tube flow measuring device and realizing method |
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| Publication Number | Publication Date |
|---|---|
| CN1773224A CN1773224A (en) | 2006-05-17 |
| CN100507469C true CN100507469C (en) | 2009-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB200410052214XA Expired - Fee Related CN100507469C (en) | 2004-11-11 | 2004-11-11 | Expanding volume tube flow measuring device and realizing method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426046B (en) * | 2011-08-26 | 2013-07-24 | 重庆耐德工业股份有限公司 | Closed type internal circulation detecting system of piston type standard volume tube |
| US8511138B2 (en) * | 2011-10-31 | 2013-08-20 | Honeywell International, Inc. | Piston prover apparatus, method and system |
| CN102944293B (en) * | 2012-12-03 | 2016-03-30 | 中国航空工业集团公司北京长城计量测试技术研究所 | The passive piston volume tube of raster pattern |
| US10215616B2 (en) * | 2016-07-18 | 2019-02-26 | Honeywell International Inc. | Coaxial linear drive-end for small volume prover |
| CN112129384B (en) * | 2020-10-20 | 2023-07-25 | 南宁学院 | Metering calibrating device for liquid volume detection |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2627237Y (en) * | 2003-04-08 | 2004-07-21 | 朱红渭 | Piston type hydraulic pump |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2627237Y (en) * | 2003-04-08 | 2004-07-21 | 朱红渭 | Piston type hydraulic pump |
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Owner name: SHENZHEN CITY JIANHENG MEASUREMENT + CONTROL CO., Free format text: FORMER NAME: SHENZHEN JIANHENG INDUSTRIAL AUTOMATION SYSTEM CO., LTD. |
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Address after: 2 floor, T3 District, A building, seven South Road, Nanshan District Science Park, Shenzhen, Guangdong, China Patentee after: GENTOS MCASUREMENT & CONTROL Co.,Ltd. Address before: Guangdong city of Shenzhen province Futian District Tairan Industrial Park Tairan industrial building four floor East Patentee before: Shenzhen Jianheng Industrial Automation System Co.,Ltd. |
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Granted publication date: 20090701 Termination date: 20131111 |