CN102628853B - The surface film drag-reduction effect tester of visco-plasticity material pipe conveying - Google Patents
The surface film drag-reduction effect tester of visco-plasticity material pipe conveying Download PDFInfo
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- CN102628853B CN102628853B CN201210076098.XA CN201210076098A CN102628853B CN 102628853 B CN102628853 B CN 102628853B CN 201210076098 A CN201210076098 A CN 201210076098A CN 102628853 B CN102628853 B CN 102628853B
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Abstract
The surface film drag-reduction effect tester of visco-plasticity material pipe conveying, belongs to experimental facilities.Comprise experiment table, dynamic plate, lifting gear, level adjustment system, air compressor machine and vacuum machine, it is characterized in that: test plate (panel) is fixed on dynamic plate, spray tested surface film, and put test specimen; One end of dynamic plate connects lifting gear, is provided with the scale of vertical height; The Vib. of an adjustable frequency and amplitude is set under dynamic plate.There is principle simple, convenience of calculation, close to live, the feature that comparability is strong.The surface film selected is applied in engineering and makes throughput rate larger, and defeated apart from farther, energy consumption is more economized.Be applicable to selection and the test of the drag reduction surface film in the conveying of various visco-plasticity material pipe.
Description
Technical field
Testing tool selected by the surface film that the present invention relates in the conveying of visco-plasticity material pipe, belongs to experimental facilities.
Background technology
Chinese patent surface film drag reduction method and visco-plasticity transportation technology (ZL20071026557.X) are the achievements of the early-stage Study of inventor.The surface film drag reduction method of the epidermal mucus of bionic animal enteron aisle film and alepidote, adopt material and pipeline enclosure arrange surface film by film method, a kind of inwall of feeding pipe reduces the surface treatment method of wall friction power.Make the internal friction of material be much higher than tube wall frictional force, reduction wall friction power problem is highlighted the principal contradiction become in pipe-line transportation system, and in Cemented filling, other a lot of complicated problems, all reduce to negligible secondary contradiction.A very complicated question simplification, just research reduces wall friction power problem emphatically, overcomes the glutinousness of soft sticky material and inner-walls of duct, and the difficult problem that visco-plasticity material remote pipe is carried just is solved.
Because feeding pipe is high energy surface, the surface energy of tube wall is very large, so adhesion work is also very large between tube wall and material, the adhesive attraction of material on tube wall is very strong, causes feeding pipe resistance very large.When feeding pipe processes, tube wall increases adsorbed layer, and add surfactant.In course of conveying, surfactant enters and is adsorbed on the inwall of pipeline, thus forms one deck firmly surface film.Make between tube wall and material, to be lined with one deck suspension film, avoid the direct friction between material and pipeline, with reduce the disturbance of visco-plasticity material and with tube wall viscosity resistance, make simultaneously material and pipeline isolated, decrease the wearing and tearing of pipeline.As the surfactant that adds during transporting clay and water, just can sprawl on tube wall, surfactant is just adsorbed on tube wall with hydrophobic hydrocarbon chain, polar group with layer of surface film stretches in pipe and is adsorbed on tube wall, the tube wall of original high energy surface is covered by surface film, the now movement of clay is carried out on surface film, and its adhesion reduces, transporting resistance is reduced.Visco-plasticity material is carried under the prerequisite of low energy consumption, realizes the remote pipe conveying of various visco-plasticity material.
The selection of surface film is one of gordian technique of long-distance sand transport visco-plasticity material, selects different surface film according to convey materials, carries out test most important to the drag-reduction effect of the surface film of different formulations.But there is no the testing tool of the selection and comparison of surface film up to now.
Summary of the invention
In order to address this problem, at Zhejiang Province's Natural Science Fund In The Light " research of visco-plasticity mud tubes conveying new method and mechanism " (M503164), under the subsidy of " soft clay---visco-plasticity material pipe post stream conveying characteristic is studied " (Y505041).The drag reduction surface film having invented the conveying of visco-plasticity material pipe selects tester.
The surface film drag-reduction effect tester of visco-plasticity material pipe conveying of the present invention, comprise experiment table, dynamic plate, lifting gear, level adjustment system, air compressor machine and vacuum machine, it is characterized in that: test plate (panel) is fixed on dynamic plate, spray tested surface film, and put test specimen; One end of dynamic plate connects lifting gear, is provided with the scale of vertical height; The Vib. of an adjustable frequency and amplitude is set under dynamic plate.
Described Platform board for experiment arranges dynamic plate and level adjustment system, fixing lifting gear, tensimeter and vacuum meter.
Described dynamic plate is used for fixing test plate (panel), and one end connects lifting gear, can regulate the angle of inclination of test plate (panel).
Described test specimen can adopt and conveying pipeline inner wall same material and same surface-treated surface plate, also can adopt the bent plate close with conveyance conduit curvature, or directly adopt conveyance conduit.Make test closer to the feed status of reality.
Advantage of the present invention
1. the one end owing to have employed dynamic plate connects lifting gear, is provided with the scale of vertical height, can obtains the various angles of inclination of test specimen.When the contact area of the weight of test specimen, test specimen and test plate (panel) and dynamic board size known, not only can draw best superficial film by relative method, but also can calculate, test specimen is to parameters such as the wall friction power of the sliding force of the normal pressure of test plate (panel), test specimen, test plate (panel) and horizontal angle, viscous friction coefficient and material and pipeline.
2. owing to arranging the Vib. of an adjustable frequency and amplitude, select different frequency from test out different drag-reduction effects in various amplitude.The problem of a lot of complicated mechanics is had in Cemented filling, the present invention catches the principal contradiction reduced in this pipe-line transportation system of wall friction power, just emphatically research reduces wall friction power problem, overcomes the glutinousness of soft sticky material and inner-walls of duct, a very complicated question simplification.Not only can draw best superficial film, but also the correlation parameter of frequency and amplitude and Cemented filling can be measured.
3. owing to fixing test plate (panel) on dynamic plate, sprayed surface film on test plate (panel), and put test specimen.Select the best surface film of specific material thus, the comparison of surface film drag-reduction effect, just become light, convenient, accurate.
4., due to the actual conditions in model engineering, adopt the bent plate identical with conveyance conduit curvature, or the conveyance conduit in direct Practical Project makes test plate (panel), the experimental data of gained, closer to the operating mode in Practical Project, has good directiveness.
So it is simple that the present invention has principle, convenience of calculation, close to live, the feature that comparability is strong.The surface film selected is applied in engineering and makes throughput rate larger, and defeated apart from farther, energy consumption is more economized.
Accompanying drawing explanation
Fig. 1 is that test pattern selected by embodiment plane test plate (panel) surface film, and Fig. 2 is that pipe surface film selects test pattern, and Fig. 3 is curved surface test plate (panel) sectional view.Superficial film (1) is comprised in figure, test plate (panel) (2), test specimen (3), hinge (4), scale (5), top board (6), hydraulic control lever (7), hydraulic cylinder (8), push rod (9), level meter (10), Vib. (11), dynamic plate (12), Platform board for experiment (13), regulate knob (14), air compressor machine (15), vacuum machine (16), tensimeter (17), vacuum table (18), climbing (19), pipeline (20), curved surface test plate (panel) (21), circular test specimen (22).
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As shown in Figure 1, surface film selects tester to comprise to embodiment: an experiment table having a level adjustment system, and level meter (10) is embedded on Platform board for experiment (13), and experiment table pin is respectively equipped with horizontal adjusting knob (14); The upper dynamic plate (12) arranged of Platform board for experiment (13), side is provided with the scale (5) of lifting gear and vertical height, installs air compressor machine (15), vacuum machine (16) under Platform board for experiment (13); Dynamic plate (12) one end connects lifting gear, arranges the Vib. (11) of an adjustable frequency and amplitude under dynamic plate (12), at the upper fixing test plate (panel) (2) of dynamic plate (12); Test plate (panel) sprays tested superficial film (1), and place test specimen (3).
Lifting gear adopts hydraulic mandril (9), and top board (6) is connected by hinge (4) with dynamic plate (12).
Superficial film (1) selects the easy degradable material of environmental protection according to the material of conveying, and the drag-reduction effect of different superficial films (1) is different, can adopt the potpourri etc. of water, lubrication activity agent, gas-development agent.When carrying soft clay, surface film liquid adopts the aqueous solution of one or more mixing in polyacrylamide (PAM), sodium n-alkylbenzenesulfonate (LAS), sodium sulfate of polyethenoxy ether of fatty alcohol (AES), AESA (AESA), sldium lauryl sulfate (K12), dispersing agent NNO, dispersing agent MF.
In order to make test closer to the feed status of reality, the material that the test plate (panel) (2) adopted is identical with conveying pipeline inner wall also does same surface treatment, also can adopt the curved surface test plate (panel) (21) close with conveyance conduit curvature, or directly adopt conveyance conduit (20).
Lower opposed face film selects the use of tester to be further described.
1. test selected by plane test plate (panel) surface film:
1st step fixes test plate (panel) (2): the material identical with conveying pipeline inner wall is made test plate (panel) (2), be fixed on the dynamic plate (12) of tester, rotate and regulate knob (14), see level meter (10), Platform board for experiment (13) is adjusted to horizontality;
2nd step sprayed surface film: test plate (panel) (2) is divided into several region, and respectively several surface film liquid is sprayed on the respective region of test plate (panel) (2), form superficial film (1);
3rd step presses the weight of following formula determination test specimen (3) and the contact area of test specimen (3) and test plate (panel) (2):
The weight of W-test specimen, unit: g,
The contact area of S-test specimen and test plate (panel), unit: cm
2,
The internal diameter of d-conveyance conduit, unit: cm,
The density of ρ-convey materials, unit: g/cm
3,
The inwall value length of l-conveyance conduit, unit: cm;
4th step puts test specimen (2): the material that need carry is filled as test specimen (2) in the container made by above formula, and test specimen (2) is inverted in the respective region of test plate (panel);
5th step starts tester: the push rod (9) stirred on hydraulic control lever (7) hydraulic cylinder (8) promotes top board (6) and drives one end of dynamic plate (12) slowly to raise, stop when test specimen (2) starts to slide rising, be good with the surface film on sliding area at first, record scale (5) reading, repeated multiple times like this checking, gets rid of contingency;
6th step vibration is compared: select Vib. (11) different frequency and amplitude to carry out above-mentioned test, and so repeatedly, record reading, averages, compare the best surface film and correlation parameter that show that this material pipe is carried.
2. pipeline selects test as the surface film of test plate (panel):
As shown in Figure 2, first fix a feeding pipe (20) in dynamic plate (12) upper climbing (19), surface film liquid is sprayed at pipeline (20) inwall, put test specimen (3).Then one end slowly raises, and stops rising when this section of material test specimen starts to slide, record scale (5) reading, and repeated multiple times like this checking, with the minimum superficial film (1) of scale (5) reading for good.Open Vib. (11), select different frequency and amplitude to carry out above-mentioned test, draw the best surface film that this material pipe is carried and correlation parameter.
3. the surface film in pipeline (20) and the test of thrust:
One section of material is housed in a feeding pipe (20), between material and tube wall, is provided with surface film liquid layer (1), make the internal friction of material be greater than wall friction power between material and feeding pipe.Connect air compressor machine (15) in one end of pipeline (20) and connect tensimeter (17), apply a pressure from low to high.When material is pushed, record in this root feeding pipe, the thrust needed for promotion material under surface film condition be:
F-promotes the thrust of material in pipeline, units/kg,
The internal diameter of d-conveyance conduit, unit: cm,
P-applies port pressure, unit: kg/cm
2,
The length of material in L-pipeline, unit: cm,
γ-viscous drag coefficient, unit: kg/cm
2,
The thrust of gained is exactly the viscosity resistance of feeding pipe inwall and material.The minimum superficial film (1) of thrust is for good.Pipeline (20) is placed as different angles, the relation of thrust and angle can be recorded.Open Vib. (11) and thrust and superficial film (1) relation at different frequency and amplitude can be recorded.
4. the test of the surface film in pipeline suction material:
The vacuum machine (16) that is tightly connected in one end of pipeline (20) connects vacuum table (18), is provided with surface film liquid layer (1) at tube wall, and pipeline (20) is inserted material with different angles.The relation of superficial film (1) and angle when aspirating material can be recorded.Open Vib. (11) and suction material and superficial film (1) relation at different frequency and amplitude can be recorded.
5. curved surface test plate (panel) upper surface film selects test.
As shown in Figure 3, dynamic plate (12) is fixed wtih 3 curved surface test plate (panel)s (21), and its curvature is identical with conveyance conduit curvature, and the material identical with conveying pipeline inner wall do same surface treatment.At the surface film liquid that the upper spraying 3 kinds of each curved surface test plate (panel) (21) is different, form superficial film (1), then put 3 identical circular test specimens (22) gently.Experimental technique and plane test plate (panel) surface film are selected to test identical.The experimental data of such gained closer to the operating mode in actual fed.
Claims (2)
1. the surface film drag-reduction effect tester of visco-plasticity material pipe conveying, it is characterized in that: an experiment table having a level adjustment system, level meter (10) is embedded on Platform board for experiment (13), experiment table pin is respectively equipped with horizontal adjusting knob (14), the upper dynamic plate (12) arranged of Platform board for experiment (13), side is provided with the scale (5) of lifting gear and vertical height, air compressor machine (15) is installed under Platform board for experiment (13), vacuum machine (16), dynamic plate (12) one end connects lifting gear, the Vib. (11) of an adjustable frequency and amplitude is set under dynamic plate (12), at the upper fixing test plate (panel) (2) of dynamic plate (12), test plate (panel) sprays tested superficial film (1), and place test specimen (3), surface film liquid adopts the aqueous solution of one or more mixing in polyacrylamide (PAM), sodium n-alkylbenzenesulfonate (LAS), sodium sulfate of polyethenoxy ether of fatty alcohol (AES), AESA (AESA), sldium lauryl sulfate (K12), dispersing agent NNO, dispersing agent MF, the weight of test specimen (3) and test specimen (3) are calculated as follows with the contact area of test plate (panel) (2):
The weight of W-test specimen, unit: g,
The contact area of S-test specimen and test plate (panel), unit: cm
2,
The internal diameter of d-conveyance conduit, unit: cm,
The density of ρ-convey materials, unit: g/cm
3,
The inwall value length of l-conveyance conduit, unit: cm;
The thrust needed for promotion material under surface film condition is:
F-promotes the thrust of material in pipeline, units/kg,
The internal diameter of d-conveyance conduit, unit: cm,
P-applies port pressure, unit: kg/cm
2,
The length of material in L-pipeline, unit: cm,
γ-viscous drag coefficient, unit: kg/cm
2,
The thrust of gained is exactly the viscosity resistance of feeding pipe inwall and material.
2. the surface film drag-reduction effect tester of visco-plasticity material pipe conveying as claimed in claim 1, it is characterized in that: the material that the test plate (panel) (2) of employing is identical with conveying pipeline inner wall also does same surface treatment, also can adopt the curved surface test plate (panel) (21) close with conveyance conduit curvature, or directly adopt conveyance conduit (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210076098.XA CN102628853B (en) | 2012-03-12 | 2012-03-12 | The surface film drag-reduction effect tester of visco-plasticity material pipe conveying |
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| CN201210076098.XA CN102628853B (en) | 2012-03-12 | 2012-03-12 | The surface film drag-reduction effect tester of visco-plasticity material pipe conveying |
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| CN102628853A CN102628853A (en) | 2012-08-08 |
| CN102628853B true CN102628853B (en) | 2015-09-09 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201091276Y (en) * | 2007-10-15 | 2008-07-30 | 陈元水 | Shoes lining and inner-pad surface friction resistance dynamic angle experimental apparatus |
| CN102279145A (en) * | 2011-06-30 | 2011-12-14 | 云南三环中化化肥有限公司 | Device for determining relative roundness of granular material and determination method thereof |
| CN102302249A (en) * | 2011-07-26 | 2012-01-04 | 广州市质量监督检测研究院 | Tester for testing surface frictional property of shoe lining and insole |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202057575U (en) * | 2011-03-08 | 2011-11-30 | 宁波大学 | Measuring device for friction factor of materials |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201091276Y (en) * | 2007-10-15 | 2008-07-30 | 陈元水 | Shoes lining and inner-pad surface friction resistance dynamic angle experimental apparatus |
| CN102279145A (en) * | 2011-06-30 | 2011-12-14 | 云南三环中化化肥有限公司 | Device for determining relative roundness of granular material and determination method thereof |
| CN102302249A (en) * | 2011-07-26 | 2012-01-04 | 广州市质量监督检测研究院 | Tester for testing surface frictional property of shoe lining and insole |
Non-Patent Citations (1)
| Title |
|---|
| 姚同玉等.用原子力显微镜研究聚丙烯酰胺膜的结构形貌.《2003年纳米和表面科学与技术全国会议(北京)论文摘要集》.2003,第106页. * |
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