CN211856306U - Freeze-thaw, salt corrosion and dry-wet coupling effect simulation test device - Google Patents
Freeze-thaw, salt corrosion and dry-wet coupling effect simulation test device Download PDFInfo
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- CN211856306U CN211856306U CN202020590528.XU CN202020590528U CN211856306U CN 211856306 U CN211856306 U CN 211856306U CN 202020590528 U CN202020590528 U CN 202020590528U CN 211856306 U CN211856306 U CN 211856306U
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Abstract
The utility model discloses a freeze thawing, salt corrosion and dry-wet coupling effect simulation test device, which at least comprises an external heat preservation box body, a circulating spraying system, a freezing and drying system and a control system, and the utility model can ensure that the temperature in the box body reaches the expected requirement and simultaneously reduce the risk of operation tests of test personnel by using the external heat preservation box body; the circulating spraying system can control the flow of the liquid required by the test, and the liquid can be recycled; the freezing system in the freezing and drying system can use an air cooling mode to enable the temperature in the box body to reach minus 20 ℃ at most, and the drying system can enable the box body to keep dry and constant temperature; the control system can automate the test steps, thereby greatly reducing the labor intensity; the device combines a circulating spraying system and a freezing and drying system, thereby saving the test space and simplifying the test steps; and a large amount of manpower is saved on the premise of ensuring the accuracy of the test.
Description
Technical Field
The utility model relates to a municipal works technical field especially relates to a freeze thawing, salt lose and do wet coupling effect analogue test device.
Background
The asphalt concrete pavement is one of the main forms of high-grade highways in the world, and has the advantages of comfortable driving, quick construction, low noise and the like. The wide saline soil areas are distributed in northern areas of China, the municipal departments can use deicing salt on roads whenever the southern areas are in rainy and snowy days in winter, the freeze-thaw, salt corrosion and dry-wet coupling effects put higher requirements on the durability of asphalt concrete pavement materials, and at present, domestic test devices for integrating freeze-thaw, salt corrosion and dry-wet coupling effects are in a blank stage.
Therefore, it is necessary to develop an automatic simulation test device for multiple factors such as freeze thawing, salt erosion and dry-wet test.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks of the prior art, the technical purpose of the present invention is to solve the problems mentioned in the background art.
In order to realize the technical purpose, the utility model provides a freeze thawing, salt etching and dry-wet coupling effect simulation test device, which at least comprises an external heat preservation box body, a circulating spraying system, a freezing and drying system and a control system;
the circulating spraying system at least comprises a rain falling device, an asphalt concrete test piece, an anti-corrosion solution tank, a Y-shaped filter, a valve, a magnetic driving circulating pump, a flowmeter, a water conveying pipeline and a support, wherein the Y-shaped filter is arranged in the anti-corrosion solution tank;
the freezing and drying system at least comprises a protective shell, an anticorrosive axial flow fan, a heater, a drying box, a refrigeration compressor, a ventilation pipeline, a ventilation switch and an adjustable ventilation port cover;
the control system is a circuit integrated box, and the circuit integrated box at least comprises a temperature controller and a programmable controller.
Preferably, the external frame of the external heat insulation box body is made of steel plate welding structural materials, and the external heat insulation box body is composed of an external steel plate frame, a polyurethane foam heat insulation plate, a cement mortar leveling layer, a waterproof air barrier layer, cement mortar and heat-proof anti-freezing toughened glass in sequence from outside to inside.
Preferably, the support is cast by low-temperature resistant concrete, and anti-corrosion and anti-skid floor tiles are laid on the support.
Preferably, the adjustable vent cover is a grille-type vent.
The utility model has the advantages that:
the utility model discloses because above-mentioned structural design, 1, through outside insulation box's use, not only can guarantee that the box internal temperature reaches the anticipated requirement, also reduced the experimental risk of testing personnel operation simultaneously.
2. The circulating spraying system can control the flow of the liquid required by the test, and the liquid can be recycled.
3. In the freezing and drying system, the freezing system can use an air cooling mode to enable the temperature in the box body to reach minus 20 ℃ at most, and the drying system can enable the box body to keep dry and constant temperature.
4. The control system can automate the test steps, thereby greatly reducing the labor intensity; such as: firstly, the asphalt concrete test piece is subjected to freeze-thaw cycle and then to dry-wet cycle.
5. The device combines a circulating spraying system and a freezing and drying system, thereby saving the test space and simplifying the test steps; and a large amount of manpower is saved on the premise of ensuring the accuracy of the test.
Drawings
Fig. 1 is a schematic overall structure diagram of the present invention;
FIG. 2 is a schematic structural view of the freezing and drying system of the present invention;
fig. 3 is a schematic structural view of the middle rain device of the present invention.
In the figure: the device comprises an external heat insulation box body 1, a rain falling device 2, an asphalt concrete test piece 3, an anticorrosive solution tank 4, a Y-type filter 5, a valve 6, a magnetic drive circulating pump 7, a flowmeter 8, a water delivery pipeline 9, a support 10, a protective shell 11, an anticorrosive axial flow fan 12, a heater 13, a drying box 14, a refrigeration compressor 15, a ventilation pipeline 16, a ventilation switch 17, an adjustable ventilation opening cover 18, a temperature controller 19 and a programmable controller 20.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Example (b):
as shown in figures 1-3, the freeze-thaw, salt corrosion and dry-wet coupling effect simulation test device at least comprises an external heat preservation box body 1, a circulating spraying system, a freezing and drying system and a control system.
The circulating spray system at least comprises a rain falling device 2, an asphalt concrete test piece 3, an anti-corrosion solution tank 4, a Y-shaped filter 5, a valve 6, a magnetic drive circulating pump 7, a flowmeter 8, a water conveying pipeline 9 and a support 10, wherein the Y-shaped filter 5 is installed in the anti-corrosion solution tank 4 and is driven by the magnetic drive circulating pump 7, a solution finally enters the rain falling device 2 through the valve 6, the flowmeter 8 and the water conveying pipeline 9, and the liquid sprayed by the rain falling device 2 flows along a drainage ditch and returns to the anti-corrosion solution tank 4.
The freezing and drying system at least comprises a protective shell 11, an anticorrosive axial flow fan 12, a heater 13, a drying box 14, a refrigeration compressor 15, a ventilating pipeline 16, a ventilating switch 17 and an adjustable ventilating port cover 18, wherein the heater 13 and the drying box 14 are combined to play a heating and drying role and are in a parallel connection state with the refrigeration compressor 15; the ventilation switch 17 is in a closed state when no current exists, and is opened when being electrified; the drying box 14 is filled with a drying agent and is of a replaceable filter element type.
The control system is a circuit integrated box, the circuit integrated box at least comprises a temperature controller 19 and a programmable controller, and the temperature controller 19 can accurately control the temperature of the freeze-thaw test and the ventilation drying in the external heat preservation box body 1; the programmable controller can set the working process according to different test requirements, and the single working time, the intermittent time and the large-cycle working times of each working program.
Specifically, the external frame of the external heat preservation box body 1 is made of steel plate welding structural materials, and the external heat preservation box body 1 is composed of an external steel plate frame, a polyurethane foam heat preservation plate, a cement mortar leveling layer, a waterproof air barrier layer, cement mortar and heat-proof anti-freezing toughened glass in sequence from outside to inside.
Specifically, the support 10 is cast by low temperature resistant concrete, and anti-corrosion and anti-slip floor tiles are laid on the support 10.
Specifically, the adjustable vent cover 18 is a grille-type vent, which can adjust the wind direction while preventing liquid from entering the ventilation duct 16 during spraying.
The test implementation steps are as follows:
And 2, putting the asphalt concrete test piece 3 into a chloride solution with fixed concentration, soaking for 7 days, and putting into an external heat insulation box body 1.
And step 3, opening a freezing system, and performing freeze-thaw damage on the asphalt concrete test piece 3 (one freeze-thaw cycle is freezing at minus 15 +/-2 ℃ for 12 hours, and the freeze-thaw cycle is melting at 6 +/-2 ℃ for 12 hours).
When the refrigeration system is opened, the refrigeration compressor 15 rapidly reduces the air temperature, the anticorrosive axial flow fan 12 provides wind power through the ventilation pipeline 16, and when the refrigeration time reaches 12 hours, the refrigeration system is closed; the drying system was turned on and the air was allowed to warm rapidly to 6 ℃. + -. 2 ℃ and remain stable (at this point the filter cartridge was removed from the 18 cabinet). The freeze-thaw test is cycled for 6 times.
And 4, opening a drying and spraying system, and performing dry-wet circulation (spraying for 11h, standing for 1h, and drying for 12h at 50 +/-2 ℃ under heating and ventilation).
And (3) starting a spraying system, starting from an anti-corrosion solution tank 4 of a circulating water supply system, driving a circulating pump 7 through magnetic force, filtering through a Y-shaped filter 5, enabling the solution to pass through a valve 6, a flowmeter 8 and a water conveying pipeline 9, finally entering a rain fall device 2, rebounding through a box body glass top plate to form simulated rainfall through the rain fall device 2, and finally spraying out liquid and returning to the anti-corrosion solution tank 4 along a drainage ditch, thereby forming water supply circulation.
When the drying system is opened, the heater 16 rapidly heats air, the anticorrosive axial flow fan 15 provides wind power through the ventilation pipeline 16, and the drying box 18 filters moisture in the air; the dry-wet test was cycled 6 times.
Step 5, the step 3 and the step 4 are a large cycle, the control system is used for setting the working process, and the working time, the intermittent time and the working times of the large cycle of each working program are respectively set; meanwhile, the control system can control the temperature to be kept in a constant state during freezing and heating ventilation.
After the test is finished, the test component after the coupling action is subjected to a corresponding mechanical property test, then the normal component and the component after the coupling action are compared in mechanical property, test data are analyzed, and meanwhile, the law of the change of the mechanical property of the asphalt concrete test piece under the coupling action of freeze thawing, salt corrosion and dry-wet is summarized through finite element software analysis, so that guidance is provided for actual engineering.
To sum up, the utility model discloses the influence problem to asphalt concrete member mechanical properties under freeze thawing, salt corrosion and dry wet coupling effect can be researched. The circulating spraying system, the freezing system and the drying system are integrated in a unified way through the control system, so that the systems are carried out according to the sequence of test steps, the test space is saved, a large amount of manpower is saved, and the test accuracy is guaranteed.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (4)
1. A freeze thawing, salt etching and dry-wet coupling effect simulation test device is characterized in that: at least comprises an external heat preservation box body (1), a circulating spraying system, a freezing and drying system and a control system;
the circulating spraying system at least comprises a rain falling device (2), an asphalt concrete test piece (3), an anti-corrosion solution tank (4), a Y-shaped filter (5), a valve (6), a magnetic drive circulating pump (7), a flowmeter (8), a water conveying pipeline (9) and a support (10), wherein the Y-shaped filter (5) is arranged in the anti-corrosion solution tank (4);
the freezing and drying system at least comprises a protective shell (11), an anti-corrosion axial flow fan (12), a heater (13), a drying box (14), a refrigeration compressor (15), a ventilation pipeline (16), a ventilation switch (17) and an adjustable ventilation port cover (18);
the control system is a circuit integrated box, and the circuit integrated box at least comprises a temperature controller (19) and a programmable controller.
2. The freeze-thaw, salt-etch and dry-wet coupling simulation test device according to claim 1, wherein: the external heat preservation box body (1) is characterized in that an external frame of the external heat preservation box body (1) is made of steel plate welding structural materials, and the external heat preservation box body (1) is composed of an external steel plate frame, a polyurethane foam heat preservation plate, a cement mortar leveling layer, a waterproof air-proof layer, cement mortar and heat-proof anti-freezing toughened glass in sequence from outside to inside.
3. The freeze-thaw, salt-etch and dry-wet coupling simulation test device according to claim 1, wherein: the support (10) is cast by low-temperature-resistant concrete, and anti-corrosion and anti-skid floor tiles are paved on the support (10).
4. The freeze-thaw, salt-etch and dry-wet coupling simulation test device according to claim 1, wherein: the adjustable vent cover (18) is a grid type vent.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020590528.XU CN211856306U (en) | 2020-04-20 | 2020-04-20 | Freeze-thaw, salt corrosion and dry-wet coupling effect simulation test device |
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| CN202020590528.XU CN211856306U (en) | 2020-04-20 | 2020-04-20 | Freeze-thaw, salt corrosion and dry-wet coupling effect simulation test device |
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| CN211856306U true CN211856306U (en) | 2020-11-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112763404A (en) * | 2021-01-27 | 2021-05-07 | 太原理工大学 | Test system for joint coupling effect of salt spray corrosion and fatigue load |
| CN113820210A (en) * | 2021-09-13 | 2021-12-21 | 华能澜沧江水电股份有限公司 | Rotary rockfill triaxial dry-wet cycle test device and test method |
| CN114486512A (en) * | 2022-03-09 | 2022-05-13 | 东北林业大学 | Concrete durability test device under load and multi-environment factor coupling effect |
-
2020
- 2020-04-20 CN CN202020590528.XU patent/CN211856306U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112763404A (en) * | 2021-01-27 | 2021-05-07 | 太原理工大学 | Test system for joint coupling effect of salt spray corrosion and fatigue load |
| CN113820210A (en) * | 2021-09-13 | 2021-12-21 | 华能澜沧江水电股份有限公司 | Rotary rockfill triaxial dry-wet cycle test device and test method |
| CN114486512A (en) * | 2022-03-09 | 2022-05-13 | 东北林业大学 | Concrete durability test device under load and multi-environment factor coupling effect |
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