CN103471983B - The durability test device of oceanic tide effect is simulated in artificial environment - Google Patents
The durability test device of oceanic tide effect is simulated in artificial environment Download PDFInfo
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- CN103471983B CN103471983B CN201310352690.2A CN201310352690A CN103471983B CN 103471983 B CN103471983 B CN 103471983B CN 201310352690 A CN201310352690 A CN 201310352690A CN 103471983 B CN103471983 B CN 103471983B
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- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 51
- 238000005260 corrosion Methods 0.000 claims abstract description 40
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 54
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- 235000020679 tap water Nutrition 0.000 claims description 19
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 17
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- 239000000463 material Substances 0.000 claims description 8
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- 150000003673 urethanes Chemical class 0.000 claims description 6
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- 230000007613 environmental effect Effects 0.000 abstract description 5
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- 229920000647 polyepoxide Polymers 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses the durability test device of simulating oceanic tide effect in a kind of artificial environment, this device comprises tidal control system, temperature and humidity control system, blowing control system, test casing and controller, test casing is connected with blowing control system, temperature and humidity control system, tidal control system, the corrosion tank placing test specimen is placed in test casing, be connected with the insulation brine pit of chamber external body by tidal control system, blower system, temperature and humidity control system and tidal control system are connected with the PLC control module in controller respectively.The invention has the beneficial effects as follows: not only can automatic imitation tidal action, accurately can also control the environmental baseline in tide process; Structure is simple, automaticity is high, stability is strong, self good endurance, and has good user interface, is applicable to the tidal action simulation of different marine environment completely.
Description
Technical field
The present invention relates to the durability test device of simulating oceanic tide effect in a kind of artificial environment.
Background technology
Reinforced concrete structure combines reinforcing bar and concrete advantage, is the first-selected pattern of civil engineering structure design.Ocean development is in recent years subject to most attention, and reinforced concrete structure at sea production vessel, bridge spanning the sea is widely applied in building.But the reinforced concrete structure be in marine environment can be subject to the erosion of villaumite, and its endurance issues becomes a global difficult problem gradually.There are some researches show, under marine environmental conditions, the corresponding hazardous medium of tidal action regional structure concrete corrodes the most serious, therefore it can be used as the key of durability design of structure.
In the transmitting procedure of villaumite, the storage of moisture in concrete and migration serve vital effect.Tidal action makes Surface layer's concrete there is moisture convective region, and the convection pass effect of moisture accelerates etching medium greatly to the transmission speed in concrete.Marine environment difference is huge all over the world, even if in areal, marine environment also can with seasonal variations, day-night change and changing, be mainly reflected in the continuous change of environment temperature, humidity and wind speed three important parameters, these three factors are directly related with concrete surface moisture diffusion speed, affect the degree of depth of Surface layer's concrete moisture convective region.Will under experiment desk research tidal action the permanance of reinforced concrete structure, must tidal action exactly in simulating natural environment, accurately control artificial environment condition.
A kind of eroding acceleration simulation test device for concrete chloride in seawater tide zone is disclosed in the Chinese utility model patent of the number of patent application 201020579952.0 of mandate on May 25th, 2011, this device can tide simulation effect, but can not apply artificial environment condition; The automatic test device for simulating ocean tide environment is disclosed at the Chinese invention patent of the number of patent application 201010193132.2 of mandate on November 21st, 2012, blowing device is added under the condition of tide simulation effect, but what be blown into is natural air outside test unit, and can not humiture be controlled, wind speed is non-adjustable.
Summary of the invention
The present invention is directed to current eroding acceleration simulation test device for concrete chloride in seawater tide zone and have that cannot to add artificial environment conditioned disjunction be to control humiture, the nonadjustable problem of wind speed, propose that a kind of stability is high, structure be simple, different artificial environmental baseline can be realized under carry out robotization tidal action test unit, the durability test device of simulating oceanic tide effect in effective simulated person's work environment is carried out to ocean tide environment.
The durability test device of oceanic tide effect is simulated in artificial environment of the present invention, it is characterized in that: comprise tidal control system, temperature and humidity control system, blowing control system, test casing and controller, described tidal control system comprises corrosion tank, brine pit, supplying drainage, tap water water inlet pipe, described corrosion tank is placed in described test casing, described corrosion tank is connected through supplying drainage with between brine pit, described corrosion tank arranges level sensor and first time level sensor on first, described brine pit inside arranges level sensor and second time level sensor on second, described tap water water inlet pipe is connected with described brine pit through the first solenoid valve, stretch into tap water water inlet pipe end in brine pit to be connected with the float switch that brine pit inside is arranged, and the height of described float switch is greater than the height of level sensor on described second, on level sensor on the first described solenoid valve, described first, described first time level sensor, described second, level sensor is all connected with described controller with described second time level sensor,
Described temperature and humidity control system comprises Temperature Humidity Sensor, evaporator, air-conditioning system, first blower fan, first motor and above-mentioned tap water water inlet pipe, described tap water water inlet pipe is connected with described evaporator, described Temperature Humidity Sensor, evaporator, air-conditioning system, first blower fan, first motor is installed in the seal cavity on described test casing side, and described Temperature Humidity Sensor is positioned at the air outlet place of the first described blower fan, the hole of described seal cavity by test casing and the inner space of test casing, and the first described blower fan, the first described motor, described air-conditioning system, described evaporator is all connected with described controller with described Temperature Humidity Sensor,
Described blower system comprises blower, air velocity transducer, the second blower fan and the second motor, installs the second blower fan and air velocity transducer in described blower, the air outlet alignment test sample of described blower; Described air velocity transducer is connected with controller, and the described magnetic drive pump that draws water, described draining magnetic drive pump, the second described blower fan, the second described motor are connected with described controller by frequency converter.
Described controller is made up of three PLC module, controls tidal control system, warm and humid control system and blowing control system respectively by also connection control device of programming.
Described blower system sets up two wind deflector supports, peg, wind deflectors, being arranged on bottom described corrosion tank outside, chamber of wind deflector support symmetry described in two, described peg is fixed on described wind deflector support by height adjustment bolt; Described wind deflector horizontally suspends on the peg described in being positioned at above blower air outlet, and described wind deflector suspension height is identical with corrosion tank coboundary.
Described chamber inside and outside wall adopts fiberglass (epoxy resin and glass fibre), moderate soak material adopts hard foamed urethanes, bottom adopts H profile steel to reinforce, and sidewall installs heating anti-condensation organic glass observation window, pressure-equalizing passageway, data detection signal line threading preformed hole.
How many described corrosion tank internal side wall, along highly arranging draw-in groove, determines the installation site of level sensor on first according to test specimen; Described corrosion tank highly installs first time level sensor in bottom far from bottom surface 5cm, and does not arrange first row water pipe and second row water pipe in test casing bottom part.
The liquid level tube of external display liquid level bottom described brine pit.
The insulation brine pit lid with pressure compensation opening is installed on described brine pit top, and bottom connects supplying drainage and the 3rd drainpipe.
The inside of described brine pit adopts SUS316L corrosion resistant plate, and outside employing fiberglass, moderate soak material adopts hard foamed urethanes to be incubated.
On the test casing described in experimenter, the hinged Warm keeping sheet with the identical material of test casing, uniform thickness opens the door.
Before on-test, test specimen is put into corrosion tank, the volume of salt solution needed for the volume calculations of concrete sample volume and corrosion tank, close the manually-operated gate of first row water pipe and the 3rd drainpipe, pour load weighted solid salt into brine pit, according to control program operation control, manual unlocking first solenoid valve, size according to required brine concentration and brine pit determines the liquid level of added tap water in liquid level tube, and the upper level sensor in brine pit is fixed on this height of water level, add water complete closedown first solenoid valve; Draw water magnetic drive pump and the second solenoid valve of mating with the magnetic drive pump that draws water (now by controller is manually opened, 3rd closed electromagnetic valve of draining magnetic drive pump and control draining magnetic drive pump), when the water level decreasing in brine pit is to manual-lock second solenoid valve during lower level sensor in brine pit and the magnetic drive pump that draws water, height according to corrosion tank middle water level installs level sensor on first, installs wind deflector subsequently in place; Test parameters is set on the controller, the complete start-up routine of optimum configurations; After program starts, air-conditioning system, the first motor and the first blower fan start running, evaporator, the second motor and the second blower fan do not operate, in operational process, controller constantly obtains temperature signal from Temperature Humidity Sensor, temperature in Adjustment Tests case until desired temperature, and keeps stable, and the salt solution in corrosion tank also can reach set temperature gradually; After running to dry run, controller sends signal, 3rd solenoid valve is opened, the magnetic drive pump of draining simultaneously starts running, when the water level decreasing in corrosion tank is to the height of first time level sensor, controller obtains signal from first level sensor, draining magnetic drive pump shuts down, 3rd closed electromagnetic valve simultaneously, now, (1) controller starts level sensor from second brine pit and obtains signal, if water level is lower than level sensor on second, controller sends signal, and the first solenoid valve is opened, and tap water water inlet pipe adds water to brine pit; After water level rises to the height of level sensor on second, controller obtains signal from level sensor second, closes the first solenoid valve, completes supplementing water bit motion; (2) evaporator runs, and controller obtains the humidity value test casing from Temperature Humidity Sensor, and the humidity value controlled in evaporator Adjustment Tests casing reaches setting value, and the condensate water formed in temperature and humidity regulation process is discharged by second row water pipe; (3) second motors and the second blower fan bring into operation, and controller obtains wind velocity signal from air velocity transducer, and change the rotating speed of the second motor by frequency converter, and adjustment wind speed is to setting value; At the end of running to drying, controller sends signal, second motor, the second fan evaporator shut down, second solenoid valve is opened, the magnetic drive pump that simultaneously draws water starts running, when height of water level in water level decreasing in brine pit to the height or corrosion tank of second time level sensor reaches the height of level sensor on first, the second closed electromagnetic valve, the magnetic drive pump that simultaneously draws water shuts down; So, program repeat runs, and after reaching setting cycle index, equipment runs and stops, and the Waste brine corroded in tank and brine pit is discharged by first row water pipe and the 3rd drainpipe respectively.
The invention has the beneficial effects as follows: can the effect of automatic analog oceanic tide, accurately control the time of dry run and immersion process, cycle index, can automatically supplement the water evaporated in process of the test, and add the protective device that adds water, improve security; Achieve the accurate control of artificial environment condition in tide analog process, especially to realize after accurate simulation ebb in concrete surface dry run environment temperature, humidity and wind speed to the impact of moisture drying speed, make that whole process of the test accurately controls, environmental baseline can quantize; Achieve blast velocity control in blowing process, aerial temperature and humidity controls.Permanance accelerated test can also be realized by arranging artificial environment parameter; Device is simple, easy to operate, cheap, really can realize the tidal action endurancing that environmental baseline is controlled.
Accompanying drawing explanation
Fig. 1 is structural framing figure of the present invention.
Fig. 2 is the part-structure schematic diagram of test unit of the present invention.
Fig. 3 is each assembly of the present invention and controller connection diagram.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing
With reference to accompanying drawing:
The durability test device of oceanic tide effect is simulated in embodiment 1 artificial environment of the present invention, comprise tidal control system 1, temperature and humidity control system 2, blowing control system 3, test casing 4 and controller 5, described tidal control system 1 comprises corrosion tank 11, brine pit 12, supplying drainage 13, tap water water inlet pipe 14, described corrosion tank 11 is placed in described test casing 4, described corrosion tank 11 is connected through supplying drainage 13 with between brine pit 12, described corrosion tank 11 arranges level sensor 111 and first time level sensor 112 on first, described brine pit 12 inside arranges level sensor 121 and second time level sensor 122 on second, described tap water water inlet pipe 14 is connected with described brine pit 12 through the first solenoid valve 141, stretch into tap water water inlet pipe 14 end in brine pit 12 to be connected with the float switch 123 that brine pit 12 inside is arranged, and the height of described float switch 123 is greater than the height of level sensor 121 on described second, on level sensor 111 on described the first solenoid valve 141, described first, described first time level sensor 112, described second, level sensor 121 is all connected with described controller 5 with described second time level sensor 122,
Described temperature and humidity control system 2 comprises Temperature Humidity Sensor 21, evaporator 22, air-conditioning system 23, first blower fan 24, first motor 25 and above-mentioned tap water water inlet pipe 14, described tap water water inlet pipe 14 is connected with described evaporator 22, described Temperature Humidity Sensor 21, evaporator 22, air-conditioning system 23, first blower fan 24, first motor 25 is installed in the seal cavity on described test casing 4 side, and described Temperature Humidity Sensor is positioned at the air outlet place of the first described blower fan, the hole of described seal cavity by test casing and the inner space of test casing, and the first described blower fan 24, the first described motor 25, described air-conditioning system 23, described evaporator 22 is all connected with described controller 5 with described Temperature Humidity Sensor 21,
Described blower system 3 comprises blower 31, air velocity transducer 32, second blower fan 33 and the second motor 34, installs the second blower fan 33 and air velocity transducer 32 in described blower 31, the air outlet alignment test sample 6 of described blower 31; Described air velocity transducer 32 is connected with controller 5, and the second described blower fan 33, the second described motor 34 are connected with described controller 5 by frequency converter.
Described controller 5 is made up of three PLC module, controls tidal control system 1, warm and humid control system 2 and blowing control system 3 respectively by also connection control device of programming.
Described supplying drainage 13 is installed in parallel draw water magnetic drive pump 15 and draining magnetic drive pump 16, and the described magnetic drive pump 15 that draws water configures the second solenoid valve 151, described draining magnetic drive pump 16 configures the 3rd solenoid valve 161, the described magnetic drive pump 15 that draws water, described draining magnetic drive pump 16, the second described solenoid valve 151, the 3rd described solenoid valve 161 are all connected with described controller 5.
Described blower system 3 sets up two wind deflector supports 35, peg 36, wind deflector 37, being arranged on bottom described corrosion tank 11 outside, chamber 4 of wind deflector support 35 symmetry described in two, described peg 36 is by being fixed on described wind deflector support 35 by height adjustment bolt 38; Described wind deflector 37 horizontally suspends on described peg 36, and described wind deflector 37 suspension height is identical with corrosion tank 11 coboundary.
Described test casing 4 inside and outside wall adopts fiberglass (epoxy resin and glass fibre), moderate soak material adopts hard foamed urethanes, bottom adopts H profile steel 41 to reinforce, and sidewall installs heating anti-condensation organic glass observation window 42, pressure-equalizing passageway 43, data detection signal line threading preformed hole 44.
How many described corrosion tank 11 internal side wall, along highly arranging draw-in groove, determines the installation site of level sensor 111 on first according to test specimen; Described corrosion tank 11 highly installs first time level sensor 112 in bottom far from bottom surface 5cm, and connects first row water pipe 113 and second row water pipe 114 respectively bottom test casing 4.
The liquid level tube 124 of external display liquid level bottom described brine pit 12.
The insulation brine pit lid 125 with pressure compensation opening 1251 is installed on described brine pit 12 top, and bottom connects supplying drainage 13 and the 3rd drainpipe 126.
The inside of described brine pit 12 adopts SUS316L corrosion resistant plate, outside employing fiberglass (epoxy resin and glass fibre), the hard foamed urethanes insulation material of middle employing.
On the test casing 4 described in experimenter, the hinged Warm keeping sheet with the identical material of test casing, uniform thickness opens the door.
Embodiment 2 is tested with the test unit of embodiment 1: arrange test parameters on the controller: environment temperature 35 DEG C, relative humidity are 70%, wind speed is 2m/s, tide system is 9:00 ~ 21:00 immersion process, 21:00 ~ 9:00 dry run, circulates 60 times.Suppose to be now 9:00.The complete start-up routine of optimum configurations:
Before on-test, test specimen is put into corrosion tank 11, the volume of salt solution needed for the volume calculations of concrete sample volume and corrosion tank 11, close the manually-operated gate of first row water pipe 113 and the 3rd drainpipe 126, pour load weighted solid salt into brine pit 12, according to control program operation control 5, manual unlocking first solenoid valve 141, size according to required brine concentration and brine pit 12 determines the liquid level of added tap water in liquid level tube 124, and level sensor on second 121 is fixed on this height of water level, add water complete closedown first solenoid valve 141, draw water magnetic drive pump 15 and the second solenoid valve 151(of mating with the magnetic drive pump 15 that draws water now by controller 5 is manually opened, 3rd solenoid valve 161 of draining magnetic drive pump 16 and control draining magnetic drive pump 16 cuts out), when the water level decreasing in brine pit 12 is to manual-lock second solenoid valve during second time level sensor 122 151 and the magnetic drive pump 15 that draws water, height according to corrosion tank 11 middle water level installs level sensor 111 on first, installs wind deflector 37 subsequently in place, controller 5 arranges test parameters, the complete start-up routine of optimum configurations,
After program starts, air-conditioning system 23, first motor 25 and the first blower fan 24 start running, evaporator 22, second motor 34 and the second blower fan 33 do not operate, in operational process, controller 5 constantly obtains temperature signal from Temperature Humidity Sensor 21, temperature in Adjustment Tests case until temperature reaches setting value, and keeps stable, and the salt solution in corrosion tank 11 also can reach set temperature gradually, run to 21:00, 3rd solenoid valve 161 is opened, the magnetic drive pump of draining simultaneously 16 starts running, when the water level decreasing in corrosion tank 11 is to the height of first time level sensor 112, controller 5 obtains signal from first level sensor 112, draining magnetic drive pump 16 shuts down, 3rd solenoid valve 161 cuts out simultaneously, now, (1) controller 5 starts level sensor 121 from second brine pit 12 and obtains signal, if water level is lower than level sensor 121 on second, controller 5 sends signal, first solenoid valve 141 is opened, tap water water inlet pipe 14 adds water to brine pit 12, after water level rises to the height of level sensor 121 on second, controller 5 obtains the signal of level sensor 121 on second, closes the first solenoid valve 141, (2) evaporator 22 runs, controller 5 obtains the humidity value test casing 4 from Temperature Humidity Sensor 21, the humidity value controlled in evaporator 22 Adjustment Tests casing 4 reaches setting value, and the condensate water formed in temperature and humidity regulation process is discharged by second row water pipe 114, (3) second motors 34 and the second blower fan 33 bring into operation, and controller 5 obtains wind velocity signal from air velocity transducer 32, and changes the rotating speed of the second motor 34 by frequency converter, and adjustment wind speed is to setting value, run to 9:00, controller 5 sends signal, second motor 34, second blower fan 33 evaporator 22 shuts down, second solenoid valve 151 is opened, the magnetic drive pump 15 that simultaneously draws water starts running, when height of water level in water level decreasing in brine pit 12 to the height or corrosion tank 11 of second time level sensor 122 reaches the height of level sensor 111 on first, the second solenoid valve 151 cuts out, and the magnetic drive pump 15 that simultaneously draws water shuts down, so, program repeat operation, after 60 circulations, equipment run and stop, and the Waste brine corroded in tank 11 and brine pit 12 is discharged by first row water pipe 113 and the 3rd drainpipe 126 respectively.
Content described in this instructions embodiment is only enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also comprises those skilled in the art and conceives the equivalent technologies means that can expect according to the present invention.
Claims (10)
1. in artificial environment, simulate the durability test device of oceanic tide effect, it is characterized in that: comprise tidal control system, temperature and humidity control system, blowing control system, test casing and controller, described tidal control system comprises corrosion tank, brine pit, supplying drainage, tap water water inlet pipe, described corrosion tank is placed in described test casing, described corrosion tank is connected through supplying drainage with between brine pit, described corrosion tank arranges level sensor and first time level sensor on first, described brine pit inside arranges level sensor and second time level sensor on second, described tap water water inlet pipe is connected with described brine pit through the first solenoid valve, stretch into tap water water inlet pipe end in brine pit to be connected with the float switch that brine pit inside is arranged, and the height of described float switch is greater than the height of level sensor on described second, on level sensor on the first described solenoid valve, described first, described first time level sensor, described second, level sensor is all connected with described controller with described second time level sensor,
Described temperature and humidity control system comprises Temperature Humidity Sensor, evaporator, air-conditioning system, first blower fan, first motor and above-mentioned tap water water inlet pipe, described tap water water inlet pipe is connected with described evaporator, described Temperature Humidity Sensor, evaporator, air-conditioning system, first blower fan, first motor is installed in the seal cavity on described test casing side, and described Temperature Humidity Sensor is positioned at the air outlet place of the first described blower fan, the hole of described seal cavity by test casing and the inner space of test casing, and the first described blower fan, the first described motor, described air-conditioning system, described evaporator is all connected with described controller with described Temperature Humidity Sensor,
Described blower system comprises blower, air velocity transducer, the second blower fan and the second motor, installs the second blower fan and air velocity transducer in described blower, the air outlet alignment test sample of described blower; Described air velocity transducer is connected with controller, and the second described blower fan, the second described motor are connected with described controller by frequency converter.
2. in artificial environment as claimed in claim 1, simulate the durability test device of oceanic tide effect, it is characterized in that: described controller is made up of three PLC module, control tidal control system, warm and humid control system and blowing control system respectively by also connection control device of programming.
3. in artificial environment as claimed in claim 2, simulate the durability test device of oceanic tide effect, it is characterized in that: described supplying drainage is installed in parallel draw water magnetic drive pump and draining magnetic drive pump, and the described magnetic drive pump that draws water configures the second solenoid valve, described draining magnetic drive pump configuration the 3rd solenoid valve, and the described magnetic drive pump that draws water, described draining magnetic drive pump, the second described solenoid valve, the 3rd described solenoid valve are all connected with described controller.
4. in artificial environment as claimed in claim 3, simulate the durability test device of oceanic tide effect, it is characterized in that: described blower system sets up two wind deflector supports, peg, wind deflectors, being arranged on bottom described corrosion tank outside, chamber of wind deflector support symmetry described in two, described peg is fixed on described wind deflector support by height adjustment bolt; Described wind deflector horizontally suspends on the peg described in being positioned at above blower air outlet, and described wind deflector suspension height is identical with corrosion tank coboundary.
5. in artificial environment as claimed in claim 4, simulate the durability test device of oceanic tide effect, it is characterized in that: described chamber inside and outside wall adopts fiberglass, moderate soak material adopts hard foamed urethanes, bottom adopts H profile steel to reinforce, and sidewall installs heating anti-condensation organic glass observation window, pressure-equalizing passageway, data detection signal line threading preformed hole.
6. simulating the durability test device of oceanic tide effect in artificial environment as claimed in claim 5, it is characterized in that: how many described corrosion tank internal side wall, along highly arranging draw-in groove, determines the installation site of level sensor on first according to test specimen; Described corrosion tank highly installs first time level sensor in bottom far from bottom surface 5cm, and does not arrange first row water pipe and second row water pipe in test casing bottom part.
7. simulate the durability test device of oceanic tide effect in artificial environment as claimed in claim 6, it is characterized in that: the liquid level tube of external display liquid level bottom described brine pit.
8. simulate the durability test device of oceanic tide effect in artificial environment as claimed in claim 7, it is characterized in that: the insulation brine pit lid with pressure compensation opening is installed on described brine pit top, bottom connects supplying drainage and the 3rd drainpipe.
9. in artificial environment as claimed in claim 8, simulate the durability test device of oceanic tide effect, it is characterized in that: the inside of described brine pit adopts SUS316L corrosion resistant plate, outside employing fiberglass, moderate soak material adopts hard foamed urethanes to be incubated.
10. simulate the durability test device of oceanic tide effect in artificial environment as claimed in claim 9, it is characterized in that: the hinged Warm keeping sheet with the identical material of test casing, uniform thickness opens the door on the test casing described in experimenter.
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| CN103900888A (en) * | 2014-02-26 | 2014-07-02 | 深圳大学 | Ocean reinforced concrete natural corrosion simulator and simulating method |
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| CN104596913B (en) * | 2015-01-12 | 2017-10-31 | 深圳大学 | A kind of high temperature drying and watering cycle automated experiment equipment of simulation strand corrosive environment |
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