CN101451940A - Multifunctional base injection type cavitation corrosion test device - Google Patents
Multifunctional base injection type cavitation corrosion test device Download PDFInfo
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- CN101451940A CN101451940A CN 200810249618 CN200810249618A CN101451940A CN 101451940 A CN101451940 A CN 101451940A CN 200810249618 CN200810249618 CN 200810249618 CN 200810249618 A CN200810249618 A CN 200810249618A CN 101451940 A CN101451940 A CN 101451940A
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Abstract
The invention belongs to a multifunctional submerged jet type cavitation test device in the fields of cavitation erosion resistance and erosion corrosion resistance of metal materials, a detachable upper end cover arranged closely is provided on top of a tank, a pressure valve and a pressure release valve are arranged on a side wall of the sealed tank, a nozzle is detachably arranged on an inner end of the tank of the same tube of the pressure valve, a testing bracket and a testing sample wafer are arranged on the other side wall of the sealed tank, a plug screw and a traverse education through hole for testing thereon are arranged at a lower part of the same side wall of the sealed tank and the pressure valve, the traverse and the education through hole are sealed through sealant; a pressure gauge is arranged on an upper part of the sealable tank matching with the pressure release valve; the plug screw and the sealed tank are sealed through a seal ring. The device is reliable in structure theory, low in manufacturing cost, handy in working use, precise in experiment effect, long in service life and reduced in energy consumption.
Description
Technical field:
The invention belongs to the anti-cavitation corrosion of metal material and a kind of test unit in the anti-erosion corrosion field, be specifically related to a kind of multifunctional base injection type cavitation corrosion test device with cavitation ionization meter and electrochemical measurement, the erosion that can simulate material under the different pressures environment, cavitation corrosion performance.
Background technology:
In marine environment, the a lot of situations of hardware contact with flowing seawater, sometimes relative velocity is very high, as the screw propeller on the condenser of boats and ships and Binhai Generator Station, naval vessel and rudder plate etc., erosion corrosion or cavitation damage just might take place in this, in this case with static seawater in the corrosion of metal behavior obviously different, therefore need the moving aqueous corrosion of corresponding test unit simulation, the corrosion behavior of evaluating material in moving water could provide reliable foundation for development, research and the application of new material as far as possible accurately.Can wash away at present or the test unit of cavitation damage mainly contains: three types of rotation, pipe stream and magnetostriction etc., its three's the relative merits and the scope of application have nothing in common with each other; The rotation test device is divided into rotating circular disk and rotor again, simple to operation, can well simulate the corrosion condition of screw propeller, but easy generation is trembled acutely during high speed rotating, therefore can't carry out the test of high flow velocities, and electrochemical signals is derived inconvenience, can not load the electro-chemical test system, in addition, the centrifugal force during owing to rotation makes that the flow characteristics of fluid is wayward, but the present domestic usefulness of this device is comparatively general, and there is this kind equipment in how tame units such as Shenyang metal institute of the Chinese Academy of Sciences; Pipe flow field simulation experimental provision can well be simulated the actual working conditions of pipeline, be easy to control the flow characteristics of fluid, but the solution amount that needs is big, complicated operation, expense height; The advantage of magnetostriction test unit is the test method simple possible, test specimen itself does not bear vibration and corresponding stress, can't carry out quantitative measurment and should not adopting and the unconformable test(ing) liquid of the chemical activity of material for test to extent of cavitation, a plurality of units such as the 725th of the China Shipbuilding Industry Corporation and Chinese Academy of Sciences corrosion institute have this kind equipment or its improvement type at home.Latter stage in 20th century, Britain non-ferrous metal research association has proposed the jet impact test method, promptly vertically be injected in specimen surface with high velocity liquid stream, this method can accurately be controlled the speed of impacting liquid stream, and flow velocity can be very high, test period is short, sample maintains static during jet impact, and institute is so that carry out electro-chemical test, after this method proposes, University of Nottingham carried out applied research, did not occur but still there is ripe test unit at present.Because the seawater corrosive medium is stronger, wash away or the process of cavitation corrosion in should take into full account the effect of corrosion, in addition along with the exploitation of deep-sea resources and the development of deep diving technology, need simulation different depth seawater to wash away evaluation with the cavitation corrosion performance.Domestic and international existing relevant device also still can't satisfy above-mentioned requirements fully at present.
Summary of the invention:
The objective of the invention is to overcome the shortcoming that prior art exists, seek to design a kind of simulation test device close of in the laboratory, setting up with actual working conditions, simulation different depth briny environment, carry out cavitation erosion test and erosion corrosion test, and in process of the test, carry out electrochemical measurement simultaneously, gather multi-function in integral whole, satisfy the cavitation corrosion in the different depth seawater and wash away evaluation, for the development research and the application of new material provides reliable test simulation environment and evaluation method.
To achieve these goals, the present invention selects the subsurface injection formula to produce high-velocity flow, so that simulate the cavitation corrosion under the different pressures state and wash away environment, realize that simultaneously galvanochemistry estimates fast, control by flow velocity realizes cavitation damage and erosion corrosion test, be provided with pressure transducer in the test cavity, so that detect and controlled pressure.
Agent structure of the present invention comprises upper end cover, tank body, bolt, tensimeter, pressure relief valve, pressurization valve, test carriage, tested print, plug screw, measurement lead, pick-up unit, high pressure reciprocating pump, pressure control valve, O-ring seal, through hole, annular boss, O RunddichtringO, groove and nozzle, and critical component wherein is the pressure-bearing test cavity and the nozzle of tank body and inner chamber thereof; The tank body top is provided with the detachable upper end cover of airtight installation, sealed shell of tank one sidewall is provided with pressurization valve and pressure relief valve, locate the detachable nozzle that is provided with the pressurization valve with on the pipeline jar of the inner, going here and there another sidewall in the sealed shell of tank is provided with test carriage and test sample, on the sealed shell of tank with pressurization valve homonymy wall on the bottom be provided with plug screw and on the measurement lead of test usefulness draw through hole, measure lead and draw between the through hole and seal by fluid sealant; The sealed shell of tank top is equipped with tensimeter with the pressure relief valve place; Seal by O-ring seal between plug screw and the sealed shell of tank; Sealed shell of tank and upper end cover are bolted to connection, and recessed embedding formula is provided with the O RunddichtringO between upper end cover and the tank body; Pressure relief valve, pressurization valve, tensimeter, plug screw all communicate with tank inner chamber by the pipeline of ganging up tank body.
Upper end cover of the present invention is circular tabular, and tank body and the upper end cover place of connecting are equipped with and are useful on the annular groove that the O RunddichtringO is installed, on the upper end cover corresponding position processing be shaped on tank body on the boss that is complementary of annular groove; The pressure relief valve place is provided with pressure control valve; Tensimeter, pressure relief valve, pressurization valve, pressure control valve and high pressure reciprocating pump pressure communication.
Apparatus of the present invention can be simulated the pressure environment under 0～600m depth of water, and can regulate pressure easily, realize the electrochemical property test in material cavitation-corrosion-resistant and erosion corrosion performance evaluation and the respective process; Tank inner chamber of the present invention is of a size of Φ 400 * 600mm; Used nozzle diameter is 2mm; Range adjustable extent between nozzle and the detected test print is 0-80mm; Its high pressure reciprocating pump technical requirement is pressure: 〉=12MPa, flow: 〉=1.5m
3/ h; Power :≤10kW.
Test unit of the present invention carries out cavitation erosion test and erosion corrosion test respectively, and in process of the test, carry out electrochemical measurements such as corrosion potential monitoring, electrochemical impedance spectroscopy, the result shows that this device can be good at realizing the control of pressure and flow velocity, can carry out electrochemical measurement in the process of test; This apparatus structure principle is reliable, and cost of manufacture is low, and it is easy to operate to work, and experiment effect is accurate, and long service life is saved the energy.
Description of drawings:
Fig. 1 is an agent structure principle schematic of the present invention.
A among Fig. 2 is respectively tank body of the present invention is connected and detects the through hole with upper end cover structural principle synoptic diagram with b.
Fig. 3 is a designs of nozzles structural principle synoptic diagram of the present invention.
Embodiment:
Also be described further in conjunction with the accompanying drawings below by embodiment.
The agent structure of present embodiment comprises upper end cover 1, tank body 2, bolt 3, tensimeter 4, pressure relief valve 5, pressurization valve 6, test carriage 7, tested print 8, plug screw 9, measure lead 10, pick-up unit 11, high pressure reciprocating pump 12, pressure control valve 13, O-ring seal 14, through hole 15, annular boss 16, O RunddichtringO 17, groove 18 and nozzle 19, test cavity has the tank body 2 of circular cross section and upper end cover 1 sealing to surround formation in the tank body, upper end cover 1 is circular slab construction, fix by several bolts 3 between upper end cover 1 and the tank body 2, upper end cover 1 is provided with O-ring seal 14 with the joint flange face of tank body 2, wherein be processed with annular recess 18 on the flange face of tank body 2, it is interior and corresponding with groove 18 that O RunddichtringO 17 is assemblied in groove 18, be processed with annular boss 16 on the flange face of upper end cover 1, after upper end cover 1 assembled with tank body 2 sealings, boss 16 matched to merge with groove 18 and is pressed against on 0 RunddichtringO 17.
Present embodiment is ganged up and is respectively arranged with tensimeter 4, pressure relief valve 5 and pressurization valve 6 on the pipeline that connects tank body 2, and the valve 6 that wherein pressurizes links to each other with high pressure reciprocating pump 12 by anti-corrosion tubing, for guaranteeing also to be provided with pressure control valve 13 on the safe way pipeline; Be provided with the test carriage 7 that is used to lay sample and calibrating terminal in the tank body 2, be provided with the plug screw 9 of through hole on the sidewall of tank body 2, seal by O-ring seal 14 between plug screw 9 and the tank body 2; The measurement lead 10 that links to each other with tested print 8 by the through hole on the plug screw 9 15 drawn tank body 2 outer and with pick-up unit 11 electric connections, measure between lead 10 and the through hole 15 and seal by fluid sealant; For not measuring the plug screw 9 that lead 10 passes, both available fluid sealant is with its through hole 15 sealings, and is also available not alternative with the plug screw of through hole, with screw sealing on this place's tank body.
When present embodiment uses, at first coupons 8 is fixed on the carriage 7, will measures lead 10 and draw tank body 2 and be connected on the pick-up unit 11, will fill seawater in the tank body 2 then, and with upper end cover 1 sealing and fixing, at last by pressurizeing in 12 pairs of sealed shell of tank of high pressure reciprocating pump; Because 5 pressure intensity of setting in the seal of blowdown valve, therefore apply different pressure by giving in the sealed shell of tank 2, just can simulate different ocean depth environment, test sample piece performance termly, thereby judge the chemical property and the corrosion resisting property of metal material sample, the data of gained promptly can be used as the foundation of judging metal material performance in respective environment in the actual monitoring.
Embodiment:
Use the test unit of above-mentioned embodiment preparation, adopt best experimental factor that the different tests material is tested, determine this test unit to material can both obtain with actual condition under identical test findings, its test parameters is as follows:
Coefficient of scouring: 0.03 (working pressure 10MPa, confined pressure 0.3MPa);
Erosion distance: 15mm;
Test period: 4 hours;
Water temperature: 20 ℃ ± 5 ℃;
Test material: ZQAl 12-8-3-2, ZCCu3.
This example is tested according to standard test method above-mentioned material, as requested sample is tested aftertreatment, and erosion profile is observed, and the corrosion resisting property of evaluating material is as follows:
By erosion profile observation and test weighing results are calculated,, verified the accuracy of the test unit of present embodiment with the data of literatures basically identical.
Claims (2)
1, a kind of multifunctional base injection type cavitation corrosion test device, agent structure comprises upper end cover, tank body, bolt, tensimeter, pressure relief valve, the pressurization valve, the test carriage, tested print, plug screw, measure lead, pick-up unit, high pressure reciprocating pump, pressure control valve, O-ring seal, through hole, annular boss, the O RunddichtringO, groove and nozzle, it is characterized in that the tank body top is provided with the detachable upper end cover of airtight installation, sealed shell of tank one sidewall is provided with pressurization valve and pressure relief valve, locate the detachable nozzle that is provided with the pressurization valve with on the pipeline jar of the inner, going here and there another sidewall in the sealed shell of tank is provided with test carriage and test sample, on the sealed shell of tank with pressurization valve homonymy wall on the bottom be provided with plug screw and on the measurement lead of test usefulness draw through hole, measure lead and draw between the through hole and seal by fluid sealant; The sealed shell of tank top is equipped with tensimeter with the pressure relief valve place; Seal by O-ring seal between plug screw and the sealed shell of tank; Sealed shell of tank and upper end cover are bolted to connection, and recessed embedding formula is provided with the O RunddichtringO between upper end cover and the tank body; Pressure relief valve, pressurization valve, tensimeter, plug screw be pipeline and the tank inner chamber pressure communication by ganging up tank body all.
2, multifunctional base injection type cavitation corrosion test device according to claim 1, it is characterized in that upper end cover is circular tabular, tank body and the upper end cover place of connecting are equipped with and are useful on the annular groove that the O RunddichtringO is installed, on the upper end cover corresponding position processing be shaped on tank body on the boss that is complementary of annular groove; The pressure relief valve place is provided with pressure control valve; Tensimeter, pressure relief valve, pressurization valve, pressure control valve and high pressure reciprocating pump pressure communication.
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| CN 200810249618 CN101451940A (en) | 2008-12-25 | 2008-12-25 | Multifunctional base injection type cavitation corrosion test device |
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| CN 200810249618 CN101451940A (en) | 2008-12-25 | 2008-12-25 | Multifunctional base injection type cavitation corrosion test device |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169071A (en) * | 2011-01-21 | 2011-08-31 | 东南大学 | Rotating disk cavitation test bench based on flexible rotor |
| CN102175561A (en) * | 2011-01-21 | 2011-09-07 | 大连海事大学 | Cavitation erosion test equipment for testing material performance and test method thereof |
| CN102353601A (en) * | 2011-07-12 | 2012-02-15 | 中国石油大学(北京) | Erosion testing machine capable of applying pulling force |
| CN102589999A (en) * | 2012-02-05 | 2012-07-18 | 南昌航空大学 | Test machine for testing wear performance of metal material in high-pressure environment |
| CN102721525A (en) * | 2012-07-05 | 2012-10-10 | 重庆大学 | Submerging jet flow testing box and testing method |
| CN102735560A (en) * | 2012-07-06 | 2012-10-17 | 东南大学 | Constant-pressure water jet cavitation test device |
| CN105234826A (en) * | 2015-09-28 | 2016-01-13 | 重庆大学 | Downhole confining pressure abrasive material jet flow simulation experimental device and method |
| CN105717040A (en) * | 2016-04-07 | 2016-06-29 | 青岛科技大学 | Clamp device for pipe flow type dynamic galvanic corrosion tests |
| CN107238566A (en) * | 2017-05-09 | 2017-10-10 | 常州大学 | The experimental provision corroded outside simulation pipeline |
| CN107656160A (en) * | 2017-10-18 | 2018-02-02 | 南方电网科学研究院有限责任公司 | Testing device and analysis method for aging characteristics of stranded carbon fiber conductor |
| CN110132828A (en) * | 2019-05-17 | 2019-08-16 | 常州大学 | A kind of anti-sand setting tests the speed erosion corrosion testing machine |
| CN111189769A (en) * | 2020-01-10 | 2020-05-22 | 重庆大学 | Metal material high-temperature oxidation simulation experiment device and experiment method |
| CN111693646A (en) * | 2020-05-08 | 2020-09-22 | 成都西油华巍科技有限公司 | Device and method for testing high-temperature high-pressure sedimentation stability of working fluid of oil-gas well |
| CN112113871A (en) * | 2020-09-18 | 2020-12-22 | 哈尔滨工业大学 | Surface microstructure fluid erosion resistance testing device |
| CN114965134A (en) * | 2022-08-02 | 2022-08-30 | 北京科技大学 | Device and method for testing cavitation erosion resistance of material |
-
2008
- 2008-12-25 CN CN 200810249618 patent/CN101451940A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169071A (en) * | 2011-01-21 | 2011-08-31 | 东南大学 | Rotating disk cavitation test bench based on flexible rotor |
| CN102175561A (en) * | 2011-01-21 | 2011-09-07 | 大连海事大学 | Cavitation erosion test equipment for testing material performance and test method thereof |
| CN102169071B (en) * | 2011-01-21 | 2012-11-28 | 东南大学 | Rotating disk cavitation test bench based on flexible rotor |
| CN102353601A (en) * | 2011-07-12 | 2012-02-15 | 中国石油大学(北京) | Erosion testing machine capable of applying pulling force |
| CN102353601B (en) * | 2011-07-12 | 2013-07-31 | 中国石油大学(北京) | Erosion testing machine capable of applying pulling force |
| CN102589999A (en) * | 2012-02-05 | 2012-07-18 | 南昌航空大学 | Test machine for testing wear performance of metal material in high-pressure environment |
| CN102721525A (en) * | 2012-07-05 | 2012-10-10 | 重庆大学 | Submerging jet flow testing box and testing method |
| CN102721525B (en) * | 2012-07-05 | 2015-04-22 | 重庆大学 | Submerging jet flow testing box and testing method |
| CN102735560A (en) * | 2012-07-06 | 2012-10-17 | 东南大学 | Constant-pressure water jet cavitation test device |
| CN105234826A (en) * | 2015-09-28 | 2016-01-13 | 重庆大学 | Downhole confining pressure abrasive material jet flow simulation experimental device and method |
| CN105717040A (en) * | 2016-04-07 | 2016-06-29 | 青岛科技大学 | Clamp device for pipe flow type dynamic galvanic corrosion tests |
| CN105717040B (en) * | 2016-04-07 | 2018-08-10 | 青岛科技大学 | A kind of fluid-guiding type dynamic galvanic corrosion test fixture device |
| CN107238566A (en) * | 2017-05-09 | 2017-10-10 | 常州大学 | The experimental provision corroded outside simulation pipeline |
| CN107238566B (en) * | 2017-05-09 | 2020-09-08 | 常州大学 | Experimental device for simulating corrosion outside pipeline |
| CN107656160A (en) * | 2017-10-18 | 2018-02-02 | 南方电网科学研究院有限责任公司 | Testing device and analysis method for aging characteristics of stranded carbon fiber conductor |
| CN110132828A (en) * | 2019-05-17 | 2019-08-16 | 常州大学 | A kind of anti-sand setting tests the speed erosion corrosion testing machine |
| CN111189769A (en) * | 2020-01-10 | 2020-05-22 | 重庆大学 | Metal material high-temperature oxidation simulation experiment device and experiment method |
| CN111693646A (en) * | 2020-05-08 | 2020-09-22 | 成都西油华巍科技有限公司 | Device and method for testing high-temperature high-pressure sedimentation stability of working fluid of oil-gas well |
| CN112113871A (en) * | 2020-09-18 | 2020-12-22 | 哈尔滨工业大学 | Surface microstructure fluid erosion resistance testing device |
| CN112113871B (en) * | 2020-09-18 | 2024-01-26 | 哈尔滨工业大学 | Surface microstructure fluid scouring resistance testing device |
| CN114965134A (en) * | 2022-08-02 | 2022-08-30 | 北京科技大学 | Device and method for testing cavitation erosion resistance of material |
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Open date: 20090610 |