CN105910947A - Test method of silt siltation characteristic of pipeline - Google Patents
Test method of silt siltation characteristic of pipeline Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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Abstract
The invention discloses a test method of the silt siltation characteristic of a pipeline. The method comprises the following steps: 1, preparing inlet water with the sand content of ; 2, determining the pipeline bottom gradient of a current simulation pipeline, discharging the inlet water with the sand content of from the water inlet of the simulation pipeline, and determining the sand content rho of the simulation pipeline at different time t to obtain a single-trial experiment data group comprising the sand content rho of the outlet water of the simulation pipeline, the corresponding time t and the corresponding pipeline bottom gradient of the simulation pipeline; and 3, adjusting the pipeline bottom gradient of the simulation pipeline, flushing the simulation pipeline, repeating step 1 to step 2 to obtain a preset number of single-trial experiment data groups, and drawing the silt siltation characteristic curve of the simulation pipeline according to the preset number of single-trial experiment data groups. The method has the advantages of reflection of the change process of pipeline silt siltation with time, reflection of the obstruction degree of the pipeline, and accurate and reliable sand content data of the outlet water.
Description
Technical field
The present invention relates to a kind of pipeline Sediment Siltation measuring technology, be specifically related to the method for testing of a kind of pipeline Sediment Siltation.
Background technology
The sewerage system in city is the important civilian infrastructure that modern city is indispensable, and pipeline alluvial blocking is the major issue faced in drainage pipeline networks daily operation management.Sewage is in pipe conveying procedure, and silt and other sediment can occur sediment thus cause impeded drainage, arranges water pollution control in urban areas and city stain, drains flooded fields and control flood and cause grave danger.
The design and construction of drainage pipeline networks lack the technical parameter of pipeline alluvial and backwash at present, the operational management in later stage lacks the technological means of analysis conduit alluvial, it is difficult to the fouling status of evaluation of subterranean drainage pipeline networks, the hydraulic calculation and analysis and maintenance desilting management of drainage pipeline networks lack the data support of necessity.
Chinese patent literature CN 104897188 A discloses a kind of method analyzing drainage pipeline alluvial characteristic and experimental provision on September 9th, 2015, and this Patent equipment includes cistern, constant current water tank, test pipeline, water tank；Cistern flows into the water inlet of test pipeline to described constant current cistern water supply, the water in constant current water tank with default constant flow rate by reflux pump, and the delivery port of test pipeline connects with water tank；Test pipeline is provided with several water level monitoring vertical tubes, and the gradient of test pipeline is adjustable, is provided with the barrier for simulating alluvial situation in test pipeline.
This patented method measures the first monitoring position and the second monitoring position the first hydraulic gradient when clear, the second hydraulic gradient when having a barrier, ratio according to the first hydraulic gradient and the second hydraulic gradient determines pipeline alluvial index, obtain single experiment array, utilize the alluvial situation of pipeline alluvial index reflection pipeline.The method there is the problem that
1, in single group experiment, after single or minority barrier is set, the ratio being had the hydraulic gradient of barrier and the hydraulic gradient of clear by mensuration carrys out reacting pipe chocking-up degree, the method can only measure single barrier deposition conditions, can not barrier or sedimentation change procedure over time in reacting pipe actual motion.It is to say, the method can only test the chocking-up degree of existing obstacle, and can not the forming process of reacting pipe Sediment Siltation.
2, when existing barrier is less or flow is bigger, barrier simulate in pipeline can not stably depositing time, the pressure-measuring pipe reading in water level monitoring vertical tube is difficult to stable, will cause test error to strengthen, and i.e. relatively greatly, test result is inaccurate for the error of data acquisition.
Summary of the invention
For defect of the prior art, the technical problem to be solved is just to provide a kind of pipeline Properties of Sediment Deposition method of testing, and it can scientifically record the data of sedimentation in pipeline.
In order to solve above-mentioned technical problem, a kind of pipeline Properties of Sediment Deposition method of testing that the present invention provides, include following steps:
1, the water inlet that configuration sand factor is；
2, the pipe bottom sloping of present day analog pipeline is measured, simulation pipe water mouth discharge sand factor the water inlet being, and simulation pipeline water outlet sand factor ρ during mensuration t the most in the same time；Obtaining single experiment array, this single experiment array includes simulating pipeline water outlet sand factor ρ, corresponding moment t and the corresponding pipe bottom sloping simulating pipeline；
3, the pipe bottom sloping of described simulation pipeline is adjusted, described simulation pipe flushing is clean, repeating said steps 1 to step 2, it is thus achieved that after the single experiment array of predetermined number, the alluvial characteristic curve of simulation pipeline is drawn according to the single experiment array of predetermined number.
The assay method simulating pipeline water outlet sand factor ρ in above-mentioned steps 2 is:
In t, taking a certain amount of water outlet with the conical flask that quality is ω from simulation pipe water outlet, conical flask and water sample are placed on balance and weigh, being designated as gross mass is M；
Being filtered by above-mentioned water sample, after filter, particle is dried, and determines that sand quality is m；
Check and verify the density p of water at a temperature of testingWater, it may be determined that the water outlet sand factor of simulation pipeline
The characteristic method of alluvial drawing simulation pipeline in above-mentioned steps 3 is: with time t as transverse axis, think the longitudinal axis, draws corresponding conduit slopeiUnder simulation pipeline alluvial characteristic curve.
Owing to the present invention uses the water inlet that sand factor is, in the simulation pipeline of certain slope, Sediment Siltation changes over time, and the sand factor in water outlet starts to gradually decrease, and in water outlet, the blocking of sand factor more novel open conduit is the most serious.By repeatedly single group experiment, draw with time t as transverse axis, the pipeline Properties of Sediment Deposition curve with water outlet sand factor as the longitudinal axis, for design and the parameter of operation management offer science of drainage pipeline networks.
Compared with prior art, the invention have the advantages that
1, by test water outlet sand factor, can reacting pipe sedimentation change procedure over time, again can reacting pipe chocking-up degree, provide parameter more direct, effective for pipeline Sediment Siltation situation；
2, use water outlet sand factor, it is to avoid water wave fluctuates the error caused, measure the data obtained accurately, reliable.
Detailed description of the invention
A kind of pipeline Properties of Sediment Deposition method of testing that the present invention provides, includes following steps:
1, the water inlet that configuration sand factor is；
To add appropriate simulation sand grains (polyvinyl chloride particles) in the pure water of certain mass, sand quality is sand factor with the ratio of the gross mass of mixed liquor；For preventing sand sedimentation, mixed liquor needs to keep flowing or stirring to maintain sand factor stable；
2, the pipe bottom sloping of present day analog pipeline is measured, simulation pipe water mouth discharge sand factor the water inlet being, and simulation pipeline water outlet sand factor ρ during mensuration t the most in the same time；Obtaining single experiment array, this single experiment array includes simulating pipeline water outlet sand factor ρ, corresponding moment t and the corresponding pipe bottom sloping simulating pipeline；
3, the pipe bottom sloping of described simulation pipeline is adjusted, described simulation pipe flushing is clean, repeating said steps 1 to step 2, it is thus achieved that after the single experiment array of predetermined number, the alluvial characteristic curve of simulation pipeline is drawn according to the single experiment array of predetermined number.
The assay method simulating pipeline water outlet sand factor ρ in above-mentioned steps 2 is:
In t, taking a certain amount of water outlet with the conical flask that quality is ω from simulation pipe water outlet, conical flask and water sample are placed on balance and weigh, being designated as gross mass is M；
Being filtered by above-mentioned water sample, after filter, particle is dried, and determines that sand quality is m；
Check and verify the density p of water at a temperature of testingWater, it may be determined that the water outlet sand factor of simulation pipeline
The characteristic method of alluvial drawing simulation pipeline in above-mentioned steps 3 is: with time t as transverse axis, think the longitudinal axis, draws corresponding conduit slopeiUnder simulation pipeline alluvial characteristic curve.
Above-mentioned sand grains uses polyvinyl chloride particles, as simulation sand grains.
Claims (3)
1. a method of testing for pipeline Properties of Sediment Deposition, is characterized in that, includes following steps:
1, the water inlet that configuration sand factor is；
2, the pipe bottom sloping of present day analog pipeline is measured, simulation pipe water mouth discharge sand factor the water inlet being, and simulation pipeline water outlet sand factor ρ during mensuration t the most in the same time；Obtaining single experiment array, this single experiment array includes simulating pipeline water outlet sand factor ρ, corresponding moment t and the corresponding pipe bottom sloping simulating pipeline；
3, the pipe bottom sloping of described simulation pipeline is adjusted, described simulation pipe flushing is clean, repeating said steps 1 to step 2, it is thus achieved that after the single experiment array of predetermined number, the Properties of Sediment Deposition curve of simulation pipeline is drawn according to the single experiment array of predetermined number.
The method of testing of a kind of pipeline Properties of Sediment Deposition the most according to claim 1, is characterized in that, the assay method simulating pipeline water outlet sand factor ρ in described step 2 is:
In t, taking a certain amount of water outlet with the conical flask that quality is ω from simulation pipe water outlet, conical flask and water sample are placed on balance and weigh, being designated as gross mass is M；
Being filtered by above-mentioned water sample, after filter, particle is dried, and determines that sand quality is m；
Check and verify the density p of water at a temperature of testingWater, it may be determined that the water outlet sand factor of simulation pipeline.
The method of testing of a kind of pipeline Properties of Sediment Deposition the most according to claim 2, is characterized in that, the method for the Properties of Sediment Deposition curve drawing simulation pipeline in described step 3 is: with time t as transverse axis, think the longitudinal axis, draws corresponding conduit slopeiUnder simulation pipeline Properties of Sediment Deposition curve.
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| CN201610221432.4A CN105910947A (en) | 2016-04-11 | 2016-04-11 | Test method of silt siltation characteristic of pipeline |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4761997A (en) * | 1984-11-20 | 1988-08-09 | Veli Reijonen Oy | Ground water well dimensioning procedure |
| US6260409B1 (en) * | 1998-03-12 | 2001-07-17 | The Texas A&M University System | Apparatus and methods for prediction of scour related information in soils |
| US6655402B1 (en) * | 2002-06-13 | 2003-12-02 | U.S. Environmental Protection Agency | System and method for vacuum flushing sewer solids |
| US7052206B1 (en) * | 2003-04-30 | 2006-05-30 | Mastromonaco Ralph G | System and method for use of an extention basin as a storm water control device |
| CN202694639U (en) * | 2012-06-27 | 2013-01-23 | 华北电力大学（保定） | Small flow resistance comprehensive laboratory table |
| CN104897188A (en) * | 2015-06-17 | 2015-09-09 | 上海水顿智能科技有限公司 | Method and experiment apparatus for analyzing drainage pipeline siltation characteristics |
-
2016
- 2016-04-11 CN CN201610221432.4A patent/CN105910947A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4761997A (en) * | 1984-11-20 | 1988-08-09 | Veli Reijonen Oy | Ground water well dimensioning procedure |
| US6260409B1 (en) * | 1998-03-12 | 2001-07-17 | The Texas A&M University System | Apparatus and methods for prediction of scour related information in soils |
| US6655402B1 (en) * | 2002-06-13 | 2003-12-02 | U.S. Environmental Protection Agency | System and method for vacuum flushing sewer solids |
| US7052206B1 (en) * | 2003-04-30 | 2006-05-30 | Mastromonaco Ralph G | System and method for use of an extention basin as a storm water control device |
| CN202694639U (en) * | 2012-06-27 | 2013-01-23 | 华北电力大学（保定） | Small flow resistance comprehensive laboratory table |
| CN104897188A (en) * | 2015-06-17 | 2015-09-09 | 上海水顿智能科技有限公司 | Method and experiment apparatus for analyzing drainage pipeline siltation characteristics |
Non-Patent Citations (3)
| Title |
|---|
| 孙丹丹: ""单泵及双泵串联泥沙输送动态特性研究"", 《中国优秀硕士学位论文全文数据库工程科技II辑》 * |
| 罗大鑫: ""管道排沙特性试验研究"", 《中国优秀硕士学位论文全文数据库工程科技II辑》 * |
| 蒋磊: ""淤积固结后粘性泥沙冲刷运动规律试验研究"", 《中国博士学位论文全文数据库工程科技II辑》 * |
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