AU2010228003A1 - Delivery pressure detection system for long distance slurry pipeline and detection method thereof - Google Patents
Delivery pressure detection system for long distance slurry pipeline and detection method thereof Download PDFInfo
- Publication number
- AU2010228003A1 AU2010228003A1 AU2010228003A AU2010228003A AU2010228003A1 AU 2010228003 A1 AU2010228003 A1 AU 2010228003A1 AU 2010228003 A AU2010228003 A AU 2010228003A AU 2010228003 A AU2010228003 A AU 2010228003A AU 2010228003 A1 AU2010228003 A1 AU 2010228003A1
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- AU
- Australia
- Prior art keywords
- ring pipe
- differential pressure
- detection
- slurry
- pipe
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/907—Measuring or control devices, e.g. control units, detection means or sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/37—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction the pressure or differential pressure being measured by means of communicating tubes or reservoirs with movable fluid levels, e.g. by U-tubes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F5/00—Measuring a proportion of the volume flow
- G01F5/005—Measuring a proportion of the volume flow by measuring pressure or differential pressure, created by the use of flow constriction
Abstract
A delivery pressure detection system for a long distance slurry pipeline and a detection method thereof, wherein the detection system includes a detection ring pipe (2), a micro-differential pressure transmitter (4) and a mercury U-tube differential pressure gauge (3), the detection ring pipe (2) and a main pipe (1) are exactly the same and are arranged in parallel, the micro-differential pressure transmitter (4)and the mercury U-tube differential pressure gauge (3) are arranged at two ends of the detection ring pipe (2), a main pipe valve (7) is arranged in the main pipe (1), a ring pipe inlet valve (5) is arranged at the inlet end of the detection ring pipe (2) and a ring pipe outlet valve (6) is arranged at the outlet end thereof. The detection method includes the following steps: the main pipe valve (7) is closed, the ring pipe inlet valve (5) and the ring pipe outlet valve (6) are opened when the slurry is transported, so that the slurry can pass through the detection ring pipe (2) before entering into a main pump (9); the micro-differential pressure transmitter (4) detects the pressure difference of two ends of the detection ring pipe (2) and sends the detected differential pressure value to a programmable logic controller; a pipeline operation expert system obtains the differential pressure value from the programmable logic controller, and calculates the on-way resistance per unit length under current flow velocity and concentration by combining with the actual length of the detection ring pipe (2).
Description
DELIVERY PRESSURE DETECTION SYSTEM FOR LONG DISTANCE SLURRY PIPELINE AND DETECTION METHOD THEREOF Field of the invention The present invention relates to a field of long distance slurry pipeline delivery, particularly to a delivery pressure detection system for a long distance slurry pipeline and a detection method of the system. Background of the invention While performing a long distance pipeline delivery of solid materials under hydraulic principles, since the delivery distance ranges from tens of kilometers to thousands of kilometers, a plurality of pressure detection stations for monitoring operation states of fluid in the pipeline are required to be increased depending on topography variations on a pipeline path. During an actual pipeline delivery, since process parameters such as delivery concentration and flow velocity may vary to a certain extent, rheological properties of the fluid vary accordingly. Therefore, on-way resistance of the fluid in the whole pipeline varies accordingly, and parameters of each pressure detection station vary accordingly. Consequently, the technical problem to be solved in a long distance pipeline delivery is how to detect parameters of the fluid in the pipeline and further adjust parameters of each pressure detection station in accordance with the detected parameters. Summary of the invention In order to precisely calculate on-way resistance of slurry under different concentrations and different flow velocities, the present invention discloses a delivery pressure detection system for a long distance slurry pipeline and a detection method of the system, and more particularly, discloses the technical solutions as follows: A delivery pressure detection system for a long distance slurry pipeline includes a detection ring pipe, a micro-differential pressure transmitter and a mercury U-tube differential pressure gauge; the detection ring pipe and a main pipe are exactly the same and are arranged in parallel; the micro-differential pressure
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transmitter and the mercury U-tube differential pressure gauge are arranged at two ends of the detection ring pipe; a main pipe valve is arranged in the main pipe, a ring pipe inlet valve is arranged at an inlet end of the detection ring pipe and a ring pipe outlet valve is arranged at an outlet end thereof. The micro-differential pressure transmitter converts a detected pressure difference between the two ends of the detection ring pipe into an analog signal which is identifiable for a programmable logic controller, sends the analog signal to the programmable logic controller, and then the analog signal is transmitted to a pipeline operation expert system, which calculates the on-way resistance per unit length under current flow velocity and concentration by combining with an actual length of the detection ring pipe. The detection ring pipe is approximately 200 meters in length. A delivery slurry pressure detection method for a long distance slurry pipeline includes steps as follows: closing the main pipe valve, opening the ring pipe inlet valve and the ring pipe outlet valve when transporting slurry, so that the slurry passes through the detection ring pipe before entering a main pump; detecting the pressure difference between the two ends of the detection ring pipe with the micro-differential pressure transmitter, and sending a detected differential pressure value signal to the programmable logic controller; obtaining the differential pressure value of the slurry from the programmable logic controller by a pipeline operation expert system, and calculating the on-way resistance per unit length under current flow velocity and concentration by combining with the actual length of the detection ring pipe. A theoretical pressure value of respective pressure detection points is calculated according to length and altitude of respective pressure detection points on the path of the main pipeline, and a fluid movement state of the slurry in the pipeline is determined by comparing the theoretical pressure value with the actual detected value. The mercury U-tube differential pressure gauge is used for calibrating accuracy of the micro-differential pressure transmitter before the micro-differential -2pressure transmitter detects the pressure difference between the two ends of the detection ring pipe. Using the system disclosed in the present invention for detection solves a techncial problem that an error between a theoretical calculation value and an actual value is large under a turbulent state of two-phase flow, and guarantees that the long distance slurry pipeline operates securely, stably and high-efficiently. Brief Description of the Drawing Fig. 1: a schematic diagram illustrating a delivery pressure detection system for a long distance slurry pipeline of the invention. Reference remarks: 1- main pipe; 2- detection ring pipe; 3- mercury U-tube differential pressure gauge; 4- micro-differential pressure transmitter; 5- ring pipe inlet valve; 6- ring pipe outlet valve; 7- main pipe valve; 8- feed pump; 9- main pump inlet. Detailed Description of the Preferred Embodiment The present invention is described in detail with reference to the accompanying drawing. As shown in Fig. 1, in front of a main pump inlet (9) of a source pump station, that is, between a feed pump (8) and the main pump inlet (9), a detection ring pipe (2) which is exactly the same as a main pipe (1) is arranged in parallel to the main pipe (1), and the detection ring pipe (2) is approximately 200 meters in length. A micro-differential pressure transmitter (4) and a mercury U-tube differential pressure gauge (3) are arranged at two ends of the detection ring pipe (2). A main pipe valve (7) is closed, and a ring pipe inlet valve (5) and a ring pipe outlet valve (6) are opened when transporting slurry, so that the slurry passes through the detection ring pipe (2) before entering a main pump. Therefore, concentration and flow velocity of the slurry in the detection ring pipe (2) are the same as those in the main pipe (1). Firstly, the mercury U-tube differential pressure gauge (3) is used for calibrating accuracy of the micro-differential pressure transmitter (4). Then, a differential pressure value signal detected by the corrected -3micro-differential pressure transmitter (4) is sent to a PLC (programmable logic controller). A pipeline operation expert system obtains the differential pressure value from the PLC, and precisely calculates on-way resistance per unit length under the current flow velocity and concentration by combining with an actual length of the detection ring pipe (2). A theoretical pressure value of respective pressure detection points can be precisely calculated according to length and altitude of respective pressure detection points on the path of a main pipeline, and a fluid movement state of the slurry in the pipeline can be determined by comparing the theoretical pressure value with the actual detected value, reminding and instructing operators to perform corresponding operations in time. -4-
Claims (6)
1. A delivery pressure detection system for a long distance slurry pipeline, characterized in that, the delivery pressure detection system comprises a detection ring pipe (2), a micro-differential pressure transmitter (4) and a mercury U-tube differential pressure gauge (3); the detection ring pipe (2) and a main pipe (1) are exactly the same and are arranged in parallel; the micro-differential pressure transmitter (4) and the mercury U-tube differential pressure gauge (3) are arranged at two ends of the detection ring pipe (2); a main pipe valve (7) is arranged in the main pipe (1), a ring pipe inlet valve (5) is arranged at an inlet end of the detection ring pipe (2) and a ring pipe outlet valve (6) is arranged at an outlet end thereof.
2. The delivery pressure detection system for a long distance slurry pipeline according to claim 1, characterized in that, the micro-differential pressure transmitter (4) converts a detected pressure difference between the two ends of the detection ring pipe (2) into an analog signal which is identifiable for a programmable logic controller, sends the analog signal to the programmable logic controller and then the analog signal is transmitted to a pipeline operation expert system, which calculates on-way resistance per unit length under current flow velocity and concentration by combining with an actual length of the detection ring pipe (2).
3. The delivery pressure detection system for a long distance slurry pipeline according to claim 1 or 2, characterized in that, the detection ring pipe (2) is approximately 200 meters in length.
4. A method of performing slurry pressure detection by using the delivery pressure detection system for a long distance slurry pipeline according to claim 1, characterized in that, the method comprises steps as follows: closing the main pipe valve (7), opening the ring pipe inlet valve (5) and the -5 - ring pipe outlet valve (6) when transporting slurry, so that the slurry passes through the detection ring pipe (2) before entering a main pump; detecting a pressure difference between the two ends of the detection ring pipe with the micro-differential pressure transmitter (4), and sending a detected differential pressure value signal to a programmable logic controller; obtaining a differential pressure value of the slurry from the programmable logic controller by a pipeline operation expert system, and calculating on-way resistance per unit length under current flow velocity and concentration by combining with an actual length of the detection ring pipe (2).
5. The method according to claim 4, characterized in that, calculating a theoretical pressure value of respective pressure detection points according to length and altitude of respective pressure detection points on the path of a main pipeline, and determining a fluid movement state of the slurry in the pipeline by comparing the theoretical pressure value with the actual detected value.
6. The method according to claim 4 or 5, characterized in that, calibrating accuracy of the micro-differential pressure transmitter (4) by using the mercury U-tube differential pressure gauge (3) before detecting the pressure difference between the two ends of the detection ring pipe with the micro-differential pressure transmitter (4). -6-
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101197425A CN101532897B (en) | 2009-03-26 | 2009-03-26 | Long distance slurry pipeline transportation pressure detection system and detection method |
| CN200910119742.5 | 2009-03-26 | ||
| PCT/CN2010/000092 WO2010108380A1 (en) | 2009-03-26 | 2010-01-21 | Delivery pressure detection system for long distance slurry pipeline and detection method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2010228003A1 true AU2010228003A1 (en) | 2011-10-27 |
| AU2010228003B2 AU2010228003B2 (en) | 2012-10-18 |
Family
ID=41103629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2010228003A Active AU2010228003B2 (en) | 2009-03-26 | 2010-01-21 | Delivery pressure detection system for long distance slurry pipeline and detection method thereof |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN101532897B (en) |
| AU (1) | AU2010228003B2 (en) |
| BR (1) | BRPI1009374B1 (en) |
| WO (1) | WO2010108380A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532897B (en) * | 2009-03-26 | 2010-11-24 | 云南大红山管道有限公司 | Long distance slurry pipeline transportation pressure detection system and detection method |
| WO2011153659A1 (en) * | 2010-06-09 | 2011-12-15 | 云南大红山管道有限公司 | Delivery pressure detecting system for long distance slurry pipeline |
| CN102507078B (en) * | 2011-11-14 | 2014-06-18 | 北京宇航系统工程研究所 | Precision measuring system and method for conveying pipe flow resistance |
| CN103808449A (en) * | 2012-11-13 | 2014-05-21 | 北京华德创业环保设备有限公司 | Mechanism for measuring micro differential pressure of pressure generation system and protecting micro differential pressure sampling measuring instrument |
| CN104315343A (en) * | 2014-10-13 | 2015-01-28 | 云南大红山管道有限公司 | Slurry pipeline conveying system for controlling accelerated flow and accelerated flow control method |
| CN106482890B (en) * | 2015-08-27 | 2018-12-14 | 北京环鼎科技有限责任公司 | A kind of test method of indirect measuring instrument suffered thrust in a fluid |
| CN106555606B (en) * | 2016-11-30 | 2018-11-30 | 长沙矿山研究院有限责任公司 | The automatic outlet device and method of flushing water in a kind of filling pipeline |
| CN109556993B (en) * | 2018-11-30 | 2023-08-18 | 中煤科工集团武汉设计研究院有限公司 | Long-distance slurry pipeline safety detection loop system |
| CN113532734B (en) * | 2021-04-24 | 2022-05-20 | 中国测试技术研究院流量研究所 | Static pressure characteristic test and effective area verification method for piston pressure gauge of differential pressure transmitter |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1003611B (en) * | 1985-04-01 | 1989-03-15 | 冶金工业部长沙黑色冶金矿山设计研究院 | Analogue method and device of slurry conduit transport design parameters |
| US5454912A (en) * | 1992-09-25 | 1995-10-03 | Dougherty; Steven J. | Suspension quality monitoring apparatus |
| CN1143185A (en) * | 1995-08-17 | 1997-02-19 | 水利部黄河水利委员会河南河务局 | Measuring method for slurry concentration in pipeline |
| CN2280898Y (en) * | 1996-05-31 | 1998-05-06 | 郭伟 | Pulp tube pressure meter sensor |
| JPH11118638A (en) * | 1997-10-09 | 1999-04-30 | Yamatake Corp | Apparatus for measuring pressure loss or flow rate of high viscosity slurry fluid and manufacture of its measuring tube |
| CN201397213Y (en) * | 2009-03-26 | 2010-02-03 | 云南大红山管道有限公司 | Long-distance slurry conduit conveying pressure check-out system |
| CN101532897B (en) * | 2009-03-26 | 2010-11-24 | 云南大红山管道有限公司 | Long distance slurry pipeline transportation pressure detection system and detection method |
-
2009
- 2009-03-26 CN CN2009101197425A patent/CN101532897B/en active Active
-
2010
- 2010-01-21 WO PCT/CN2010/000092 patent/WO2010108380A1/en active Application Filing
- 2010-01-21 AU AU2010228003A patent/AU2010228003B2/en active Active
- 2010-01-21 BR BRPI1009374A patent/BRPI1009374B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010108380A1 (en) | 2010-09-30 |
| BRPI1009374A2 (en) | 2016-03-15 |
| CN101532897B (en) | 2010-11-24 |
| AU2010228003B2 (en) | 2012-10-18 |
| BRPI1009374B1 (en) | 2019-08-13 |
| CN101532897A (en) | 2009-09-16 |
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