CN102661765B - Metering method for diversion measurement of large-diameter pipeline - Google Patents
Metering method for diversion measurement of large-diameter pipeline Download PDFInfo
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- CN102661765B CN102661765B CN201210177982.2A CN201210177982A CN102661765B CN 102661765 B CN102661765 B CN 102661765B CN 201210177982 A CN201210177982 A CN 201210177982A CN 102661765 B CN102661765 B CN 102661765B
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Abstract
The invention relates to a metering method for diversion measurement of a large-diameter pipeline. The metering method is mainly realized by improving mass flowmeters and adding a plurality of auxiliary accessories on the two sides of each mass flowmeter. Two concentrated pipes are arranged on a conveying pipeline; two metering groups are connected between the two concentrated pipes in parallel; and the metering groups comprises the mass flowmeters, metering pipelines positioned between the mass flowmeters and the concentrated pipes, and metering gate valves positioned between the mass flowmeters and the concentrated pipes. The structure is utilized for metering the flow rate of a naphtha ship unloading pipeline. According to the metering method disclosed by the invention, the metering requirements of ship unloading operation of a ten-thousand-tonnage naphtha ship can be met, and the ship unloading time can be shortened.
Description
Technical field
The present invention relates to a kind of flow metering method, relate to concretely a kind of metering method that is applicable to the measuring shunt large diameter pipeline flow of ton harbour naphtha ship-discharging operation use.
Background technology
80000 tons of measuring instruments that harbour naphtha is unloaded a ship and used, 26 cun of mass flowmeters of general employing, pipeline is 24 cun before and after mass flowmeter because at that time mass flowmeter manufacturing capacity and accuracy class limited, so the highest accurate mass flowmeter bore can only be accomplished DN150.And in actual motion, use procedure now, two mass flowmeters allow the biggest quality of circulation medium within the unit interval, the speed of unloading a ship is 1600t/h, and negotiability is less.The clean unloading times of 3.5 ten thousand tons of naphthas need 27 hours under normal circumstances, and total unloading time needs 35 hours (berth, frontier inspection, metering, chemical examination).If be subject to marine Lidar Equation, ship, in alongside at night, unloads disc despatch and will shorten.If fail, unload a ship on schedule, can produce demurrage use, therefore two mass flowmeters can not meet ton naphtha ship ship-discharging operation.
If want, reduce and unload disc despatch, needing increases the flow velocity of mass flowmeter of unloading a ship, if do not transform, and directly adopt, increases mass flowmeter flow velocity, and metering and the hazards of existence are as follows:
If 1 mass flowmeter is everlasting, under large flow status, work, can vibrate and increase and work under ultimate limit state, very easily cause mass flowmeter to damage.
If 2 flows are excessive, the pressure loss is excessive before and after mass flowmeter, very easily causes measured deviation and produces metering dispute.
If 3 flow velocitys are too fast, naphtha and pipeline inwall friction force become and can increase, and security risk increases.
If again increase a new pipeline near this pipeline, increase flow velocity:
1, pipeline modification need to clean naphtha in process pipeline, purge clean rear (welding) condition of getting angry that meets, and this embodiment reclaims difficulty greatly for naphtha.
2, near other pipelines, get angry, have very big potential safety hazard, be unfavorable for safety work.
3, separately increase pipeline and need very big expense.
Summary of the invention
In view of the defect that prior art exists, the object of the invention is to provide a kind of metering method of improved measuring shunt large diameter pipeline, this metering method can meet the measuring requirement of ton naphtha ship ship-discharging operation, improves and unloads disc despatch.
For achieving the above object, the technology used in the present invention solution:
A metering method for measuring shunt large diameter pipeline, mainly by modification quality flowmeter, and adds some auxiliary accessories in the both sides of mass flowmeter and realizes this metering method.
A metering method for measuring shunt large diameter pipeline, is characterized in that: two concetrated pipes are set on delivery line; Two Sets of Measurement groups are connected in parallel between two concetrated pipes; Described metering group comprises mass flowmeter, at the metering pipeline between mass flowmeter and concetrated pipe and the metering gate valve between mass flowmeter and concetrated pipe, utilizes the said structure metering naphtha pipeline flow of unloading a ship.
Described mass flowmeter comprises outside and inner two parts, and described outside comprises shell, is positioned at the associated line of shell lower end and is positioned at the terminal box on associated line; Inside comprises thermopair, and U-shaped flowtube is positioned at the supporter of U-shaped flowtube end, and Electromagnetic Drive coil is set on supporter.
Adopt after such scheme, the present invention has following beneficial effect compared with the conventional method:
The present invention is mainly by modification quality flowmeter, and in the both sides of mass flowmeter, add some auxiliary accessories and realize flow metering, without increasing new pipeline or accelerating, the flow velocity of existing mass flowmeter is reduced and unloads disc despatch, measuring requirement that can ton naphtha ship ship-discharging operation, improves and unloads disc despatch.
Accompanying drawing explanation
Fig. 1 is pipeline syndeton schematic diagram of the present invention;
Fig. 2 is mass flowmeter structural representation of the present invention.
In figure: 1, delivery line, 2, concetrated pipe, 3, mass flowmeter, 3a, shell, 3b, associated line, 3c, terminal box, 3d, U-shaped flowtube, 3e, supporter, 3f, Electromagnetic Drive coil, 3g, thermopair, 4, metering pipeline, 5, metering gate valve.
Embodiment
Below in conjunction with accompanying drawing 1 and accompanying drawing 2, specifically describe the present invention:
A metering method for measuring shunt large diameter pipeline, mainly by modification quality flowmeter, and adds some auxiliary accessories in the both sides of mass flowmeter and realizes this metering method.
A metering method for measuring shunt large diameter pipeline as described in Figure 1, arranges two concetrated pipes 2 on delivery line 1; Two Sets of Measurement groups are connected in parallel between two concetrated pipes 2; Described metering group comprises mass flowmeter 3, at the metering pipeline 4 between mass flowmeter 3 and concetrated pipe 2 and the metering gate valve 5 between mass flowmeter 3 and concetrated pipe 2, utilizes the said structure metering naphtha pipeline flow of unloading a ship.
Described mass flowmeter 3 comprises outside and inner two parts, and described outside comprises shell 3a, is positioned at the associated line 3b of shell 3a lower end and is positioned at the terminal box 3c on associated line 3b; Inside comprises thermopair 3g, and U-shaped flowtube 3d is positioned at the supporter 3e of U-shaped flowtube 3d end, and Electromagnetic Drive coil 3f is set on supporter 3e.
The DN600 pipeline that the preferred harbour of described delivery line is used, and the preferred DN150 pipeline of metering pipeline.
Described mass rate is counted U-shaped flowtube 3d in DN600 pipeline sensor as Fig. 2, when not having fluid to flow through flowtube 3d, flowtube is driven by the Electromagnetic Drive coil 3f that is arranged on flowtube 3d end, its amplitude is less than 1mm, frequency is about 80Hz, and fluid is forced to accept the vertical movement up and down of flowtube 3d while flowing into flowtube 3d.In the half period of upwards vibrating at flowtube 3d, fluid resistance pipe moves upward and flowtube 3d is applied to a downward power; Otherwise the fluid that flows out flowtube 3d applies the power making progress to flowtube 3d and moves downward and its vertical momentum is reduced with resistance pipe.This just causes flowtube 3d to produce distortion, and in the other half period of vibration, flowtube 3d vibrates downwards, and direction of twist is contrary, and this mass flowmeter is section's formula mass flowmeter.
Claims (1)
1. a metering method for measuring shunt large diameter pipeline, mainly by modification quality flowmeter, and adds some auxiliary accessories in the both sides of mass flowmeter and realizes this metering method, it is characterized in that: two concetrated pipes are set on delivery line; Two Sets of Measurement groups are connected in parallel between two concetrated pipes; Described metering group comprises mass flowmeter, at the metering pipeline between mass flowmeter and concetrated pipe and the metering gate valve between mass flowmeter and concetrated pipe, utilizes the said structure metering naphtha pipeline flow of unloading a ship; Described mass flowmeter comprises outside and inner two parts, and described outside comprises shell, is positioned at the associated line of shell lower end and is positioned at the terminal box on associated line; Inside comprises thermopair, and U type flowtube is positioned at the supporter of U type flowtube end, and Electromagnetic Drive coil is set on supporter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210177982.2A CN102661765B (en) | 2012-06-01 | 2012-06-01 | Metering method for diversion measurement of large-diameter pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210177982.2A CN102661765B (en) | 2012-06-01 | 2012-06-01 | Metering method for diversion measurement of large-diameter pipeline |
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| Publication Number | Publication Date |
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| CN102661765A CN102661765A (en) | 2012-09-12 |
| CN102661765B true CN102661765B (en) | 2014-03-12 |
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| CN201210177982.2A Active CN102661765B (en) | 2012-06-01 | 2012-06-01 | Metering method for diversion measurement of large-diameter pipeline |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057333A (en) * | 1990-06-08 | 1991-12-25 | 微运转机械股份有限公司 | Coriolis mass flowmeter with the stability improved |
| CN2366830Y (en) * | 1999-03-26 | 2000-03-01 | 王增瑜 | Large diameter and rotating type coriolis mass flow meter |
| CN1515879A (en) * | 1998-05-29 | 2004-07-28 | 株式会社奥巴尔 | Coriolis mass flowmeter |
| CN2743799Y (en) * | 2004-08-04 | 2005-11-30 | 上海天信仪表有限公司 | Keshi Force mass flowmeter of reducing U-shaped vibration tube |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001108501A (en) * | 1999-10-05 | 2001-04-20 | Oval Corp | Coriolis mass flowmeter |
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2012
- 2012-06-01 CN CN201210177982.2A patent/CN102661765B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057333A (en) * | 1990-06-08 | 1991-12-25 | 微运转机械股份有限公司 | Coriolis mass flowmeter with the stability improved |
| CN1515879A (en) * | 1998-05-29 | 2004-07-28 | 株式会社奥巴尔 | Coriolis mass flowmeter |
| CN2366830Y (en) * | 1999-03-26 | 2000-03-01 | 王增瑜 | Large diameter and rotating type coriolis mass flow meter |
| CN2743799Y (en) * | 2004-08-04 | 2005-11-30 | 上海天信仪表有限公司 | Keshi Force mass flowmeter of reducing U-shaped vibration tube |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2001-108501A 2001.04.20 |
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| CN102661765A (en) | 2012-09-12 |
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