Material test temperature zone control device under water-salt-temperature coupling environment effect

Abstract

The utility model discloses a material test temperature zoning control device under a water-salt-temperature coupling environment effect, which comprises a main test box temperature zoning control device, a protective shell is arranged on one side of the main test box temperature zoning control device, a base plate is arranged in the protective shell through a support, and the base plate is provided with a water inlet and a water outlet. And an inner test box is arranged above the base plate. The temperature zoning control device can be used for performing temperature zoning control on a sample in the inner test box and simulating the working conditions of a buried engineering structure material in an underground water salt environment and an overground low-temperature environment; the temperature gradient and temperature zone control of an engineering structure material in a frozen area above a soil body freezing front surface and an unfrozen area below the freezing front surface is realized; by adjusting and controlling the temperature gradient of a low-temperature freezing area at the top of a sample in the inner test box and the temperature gradient of an unfrozen area at the bottom of the inner test box, the movement of a freezing front surface position and the control of freezing depth are realized, so that the test can accurately and truly simulate water-salt temperature environment working conditions of areas with different freezing depths.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering material special environment work performance test test equipment technical field more specifically, relate to a material test temperature partition control device of water-salt-temperature coupling environment action. BACKGROUND

[0002] South Xinjiang has vast saline soil area, and the road subgrade engineering in south Xinjiang will be affected by dry-wet-salt freeze-thaw cycle, freeze-thaw cycle, dry-wet-cycle, so that the structure is damaged. Freeze-thaw cycle is very serious to the structure damage, and is the focus of the test. Usually, the material in the test cylinder is frozen and thawed by controlling the test piece during the test.

[0003] The existing water-salt-temperature coupling system has certain drawbacks, only considering single freezing and thawing effect. The formation of freezing front and the effect on the structure when freezing at low temperature are not considered. The road engineering subgrade part of the engineering building will form a freezing front under the action of low temperature, and the buried engineering structure part of the bridge will form two freezing fronts under the action of low temperature, one in the river water and one in the riverbed soil. However, the existing test cylinder cannot realize the temperature partition control technology, and can only be completely frozen or thawed, so that the freezing front cannot be formed. The test has certain limitations and inaccuracy. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of temperature partition control devices of water-salt-temperature coupling environment action of material test, the temperature partition control device can carry out temperature partition control to the sample in inner test box, simulate buried engineering structure material in groundwater salt environment and above ground low temperature environment working condition, realize the temperature gradient and temperature partition control of frozen region above the freezing front of engineering structure material in soil and frozen region below the freezing front, the movement of freezing front position and the control of freezing depth are realized by adjusting and controlling the temperature gradient of sample top low-temperature freezing region of inner test box and the temperature gradient of inner test box bottom unfrozen region, so that test can accurately and truly simulate the water salt temperature environment working condition of different freezing depth region.

[0005] In order to realize the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0006] The utility model provides a kind of temperature partition control device of material test of water-salt-temperature coupling environmental action, including main test box temperature partition control device, one side of the main test box temperature partition control device is equipped with protective housing, the inside of the protective housing is equipped with base plate by support, the top of the base plate is equipped with inner test box, the inside of the inner test box is equipped with six sample steel cylinders of equidistant spacing, the four corners of the periphery of the base plate are all equipped with counterforce support upwards and the counterforce support passes through protective housing and is connected to the lower surface of loading device support plate upwards, the loading device support plate is embedded and installed with the hydraulic cylinder of six sample steel cylinders respectively and lower position, wherein each hydraulic cylinder is equipped with energy storage device below and the energy storage device is equipped with pressure sensor below, the pressure sensor is pressed to upper pressing plate by force link below, the surface of the base plate below six sample steel cylinders is embedded and installed with lower pressing plate, the side of the six sample steel cylinders is all processed into hollow area and the hollow area is filled with annular lifting sealing ring, the front end of the lifting sealing ring is connected with height indicating handle.

[0007] As further optimization of the present scheme, the surface of the upper pressing plate and the lower pressing plate is all processed with discrete through holes, the outside of the inner test box is communicated with circulating water inlet pipe and circulating backwater pipe, the circulating water inlet pipe and the circulating backwater pipe are circumscribed with temperature control liquid storage tank, the temperature control liquid storage tank is equipped with control panel on one side and refrigeration and heating system on the other side, the hydraulic cylinder is communicated to the hydraulic pump above through pipeline and six-way valve.

[0008] As further optimization of the present scheme, the upper surface of the inner test box is embedded and installed with six displacement sensors and the probes of the six displacement sensors are all downward on the upper surface of the upper pressing plate, the upper surface of the inner test box is also equipped with liquid level indicator.

[0009] As further optimization of the present scheme, the outside of the six sample steel cylinders is all processed with vertical through slot and the through slot extends into the hollow area of the sample steel cylinder, the height indicating handle moves up and down inside the through slot and drives the lifting sealing ring inside to move up and down, the front end of the hollow area of the six sample steel cylinders is communicated with hot air pipeline, the hot air pipeline is circumscribed with small hot air machine, the small hot air machine is embedded and installed to the inside of the side slot of protective housing, the surface of the height indicating handle is vertically through guide rod, the guide rod is processed with thread on the rod body and the height indicating handle is limited height on the guide rod by upper and lower nuts.

[0010] As further optimization of the present scheme, the six sample steel cylinders are put into material sample of curing completion inside.

[0011] As a further optimization of the scheme, the inside surface of the hollow area of the sample steel cylinder is sequentially provided with a plurality of sensor mounting holes in a spiral distribution from top to bottom, and the inside of the sensor mounting hole is provided with a moisture sensor, a salt sensor and a temperature sensor.

[0012] As a further optimization of the scheme, the moisture sensor, the salt sensor, the temperature sensor, the displacement sensor, the pressure sensor and the liquid level indicator are all connected to the corresponding interfaces of the external data acquisition monitoring system through lines.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] In the utility model, six sample steel cylinders with hollow sides and vertical grooves are arranged, and lifting sealing rings and height indicating handles are arranged in the hollow areas, the hollow areas are connected to the air heater, the sample steel cylinders are heated in different zones, the height of the height indicating handle of each sample steel cylinder is adjusted, the hollow area of each sample steel cylinder is heated at different heights, the upper area of the sample steel cylinder is heated by the high-temperature or low-temperature water bath, the lower area of the sample steel cylinder is heated by the hot air, the temperature of the sample steel cylinder is controlled, the temperature gradient and temperature zoning control of the frozen area above the freezing front and the unfrozen area below the freezing front of the engineering structure material in the soil body are realized, the position of the freezing front and the depth of freezing are controlled by adjusting the temperature gradient of the low-temperature frozen area at the top of the sample and the temperature gradient of the unfrozen area at the bottom of the sample, and the water salt temperature environment of the freezing depth area is simulated. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front structure schematic view of the material test temperature zoning control device of the utility model (in order to conveniently observe the connecting structure of components, part of the protective shell and the sample steel cylinder shell are removed, and the inner test box is transparent);

[0016] Figure 2 It is a sample steel cylinder connecting structure schematic view of the utility model (in order to conveniently observe the connecting structure of components, part of the protective shell and the sample steel cylinder shell are removed, and the inner test box is transparent);

[0017] Figure 3 It is a lifting sealing ring and height indicating handle connecting structure schematic view of the utility model (in order to conveniently observe the connecting structure of components, part of the protective shell and the sample steel cylinder shell are removed, and the inner test box is transparent);

[0018] Figure 4 This is a schematic diagram of the rear structure of the material testing temperature zone control device of this utility model;

[0019] In the diagram: 1. Main test chamber temperature zone control device; 2. Protective outer shell; 3. Sliding bracket; 4. Inner test chamber; 5. Reaction bracket; 6. Loading device support plate; 7. Hydraulic pump; 8. Circulating water inlet pipe; 9. Circulating water return pipe; 10. Temperature-controlled liquid storage tank; 11. Hydraulic cylinder; 12. Energy storage device; 13. Pressure sensor; 14. Force transmission rod; 15. Sample steel cylinder; 16. Upper pressure plate; 17. Lower pressure plate; 18. Liquid level indicator; 19. Displacement sensor; 20. Small hot air blower; 21. Hot air duct; 22. Hollow area; 23. Sensor mounting hole; 24. Guide rod; 25. Lifting sealing ring; 26. Height indicator handle. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0021] To address the limitations and inaccuracies inherent in existing experimental chambers that cannot achieve zoned temperature control (resulting in either complete freezing or thawing without the formation of a freezing front), further research is needed. Figure 1 As shown, this application includes a main test chamber temperature zone control device 1. A protective shell 2 is provided on one side of the main test chamber temperature zone control device 1. A sliding bracket 3 is installed at the bottom inside the protective shell 2. An inner test chamber 4 is placed on top of the sliding bracket 3. Here, in order to facilitate the observation of the component connection structure, part of the protective shell 2 and the sample steel cylinder 15 shell are removed and the inner test chamber 4 is made transparent. In fact, the inner test chamber 4 is made of stainless steel.

[0022] like Figure 2 As shown, six sample steel cylinders 15 are evenly spaced inside the inner test chamber 4. Vertical reaction supports 5 are provided at the four corners of the sliding support 3, and the vertical reaction supports 5 pass through the top plate of the protective shell 2 and connect upward to the lower surface of the loading device support plate 6. Hydraulic cylinders 11 are embedded in the loading device support plate 6 and are respectively aligned with the six sample steel cylinders 15 below. Each hydraulic cylinder 11 is provided with an energy storage device 12 below it and a pressure sensor 13 is provided below the energy storage device 12. The pressure sensor 13 is pressed down onto the upper pressure plate 16 through the force transmission rod 14. Lower pressure plates 17 are embedded in the surface of the base plate 4 below the six sample steel cylinders 15. Discrete through holes are machined on the surfaces of the upper pressure plate 16 and the lower pressure plate 17.

[0023] like Figure 1As shown, the inner test box 4 outer side is communicated with circulating water inlet pipe 8 and circulating backwater pipe 9, circulating water inlet pipe 8 and circulating backwater pipe 9 are connected with temperature control liquid storage tank 10, temperature control liquid storage tank 10 is provided with control panel on one side and refrigeration and heating system on the other side, hydraulic cylinder 11 is communicated to the hydraulic pump 7 above through pipeline and six-way valve;

[0024] As shown in the figure, Figure 2 As shown, the inner test box 4 upper surface is embedded with six displacement sensors 19 and the six displacement sensors 19 probes are all downwardly abutting on the upper surface of the upper pressing plate 16, the inner test box 4 upper surface is also provided with liquid level indicator 18;

[0025] As shown in the figure, Figure 3 As shown, the six sample steel cylinders 15 side are all processed into hollow shape and the hollow area 22 is filled with annular lifting sealing ring 25, the lifting sealing ring 25 front end is connected with height indicating handle 26, the six sample steel cylinders 15 outer side are all processed with vertical through slot and the through slot extends into the hollow area 22 of the sample steel cylinder 15, the height indicating handle 26 moves up and down in the through slot and drives the lifting sealing ring 25 inside to move up and down, the hollow area 22 front end of the six sample steel cylinders 15 is communicated with hot air pipeline 21, the hot air pipeline 21 is connected with small hot air machine 20, the height indicating handle 26 surface vertically passes through guide rod 24, the guide rod 24 rod is processed with screw and the height indicating handle 26 is limited height on the guide rod 24 through upper and lower nuts, the sample steel cylinder 15 hollow area 22 inner side is sequentially provided with several sensor mounting holes 23 which are distributed in spiral from top to bottom, the sensor mounting holes 23 are internally installed with moisture sensor, salt content sensor, temperature sensor;

[0026] As shown in the figure, Figure 4 As shown, the small hot air machine 20 is embedded and installed into the side slot inside the protective shell 2, the height indicating handle surface vertically passes through the guide rod;

[0027] In the specific test, the six sample steel cylinders 15 are placed in the cured material samples, the moisture sensor, the salt sensor, the temperature sensor, the displacement sensor 19, the pressure sensor 13 and the liquid level indicator 18 are connected to the corresponding interfaces of the external data acquisition monitoring system through the lines, the test personnel can adjust the height position of the height indicator 26 of each sample steel cylinder 15 and limit the position on the guide rod 24 through the nut, and the hollow area 22 of each sample steel cylinder 15 has a heating area at different heights, in the test, the upper area of the sample steel cylinder 15 is input into the high-temperature or low-temperature external circulating water bath through the temperature control liquid storage tank 10 for temperature adjustment, the water bath enters the through hole of the lower pressing plate 17 through the through hole above the base plate 3, the water infiltrates from the bottom, simulates the effect of water and salt migration, the force transmission rod 14 connects the upper pressing plate 16 and the pressure sensor 13 to measure the stress change of the sample, and the liquid level indicator 18 obtains the liquid level height of the salt solution to simulate the damage effect of the no groundwater recharge condition and the different groundwater depth conditions on the sample;

[0028] When the temperature partition control is performed, the small hot air blower 20 corresponding to the sample steel cylinder 15 is started to work, different temperature hot air is input into the heating area surrounded by the hollow area 23 and the lifting sealing ring 25 through the hot air pipeline 21, the temperature in the variable area is changed, and then the temperature of the sample inside is changed, combined with the temperature sensor inside the sample steel cylinder 15, the temperature partition control of the material sample in the sample steel cylinder is realized, the real environment condition that the engineering structure material part of the bridge is in water and part is in soil is simulated, two freezing fronts are formed, the test simulation accuracy is better, and the real engineering structure material freezing condition can be better reflected.

[0029] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.

[0030] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A water-salt-temperature coupling environmental action material test temperature partition control device, comprising a main test box temperature partition control device, one side of the main test box temperature partition control device is provided with a protective shell, the inside of the protective shell is provided with a base plate through a support, the top of the base plate is provided with an inner test box, the inside of the inner test box is provided with six sample steel cylinders at equidistant intervals, the four corner positions of the periphery of the base plate are all provided with a counterforce support upward, and the counterforce support passes through the protective shell and is connected to the lower surface of a loading device support plate upward, a hydraulic cylinder is embedded and installed on the loading device support plate, and the lower surface of each hydraulic cylinder is provided with an energy storage device, and the lower surface of the energy storage device is provided with a pressure sensor, the pressure sensor is pressed downward to an upper pressing plate through a force transmission rod, and the surface of the base plate below the six sample steel cylinders is embedded and installed with a lower pressing plate, characterized in that: Six sample steel cylinders are hollowed out and filled with annular lifting sealing rings, and the front end of the lifting sealing ring is connected with a height indicator.

2. The temperature partition control device for material testing in a water-salt-temperature coupled environment according to claim 1, characterized in that: The upper and lower pressing plates are provided with discrete through holes, the outer side of the inner test box is connected with a circulating water inlet pipe and a circulating water return pipe, the circulating water inlet pipe and the circulating water return pipe are connected with a temperature control liquid storage tank, one side of the temperature control liquid storage tank is provided with a control panel and the other side is provided with a refrigeration and heating system, and the hydraulic cylinder is connected to the upper hydraulic pump through a pipeline and a six-way valve.

3. The temperature zoned control device for material testing in a water-salt-temperature coupled environment according to claim 1, wherein: Six displacement sensors are embedded on the upper surface of the inner test box, and the probes of the six displacement sensors are downwardly arranged on the upper surface of the upper pressing plate.

4. The temperature partition control device for material testing under water-salt-temperature coupled environmental action according to claim 1, characterized in that: The outer side of the six sample steel cylinders is provided with vertical grooves, the grooves extend into the hollow area of the sample steel cylinders, the height indicator moves up and down in the groove and drives the lifting sealing ring inside to move up and down, the front end of the hollow area of the six sample steel cylinders is connected with a hot air pipeline, the hot air pipeline is connected with a small hot air machine, the small hot air machine is embedded in the side slot of the protection shell, the height indicator vertically passes through a guide rod, the guide rod is provided with threads on the rod body, and the height indicator is limited in height on the guide rod by upper and lower nuts.

5. The temperature zoned control device for material testing in water-salt-temperature coupled environmental action according to claim 4, characterized in that: The six sample steel cylinders are filled with cured material samples.

6. The temperature zoned control device for material testing in water-salt-temperature coupled environment according to claim 3, characterized in that: The inner side of the hollow area of the sample steel cylinder is provided with a plurality of sensor mounting holes in a spiral distribution from top to bottom, and the sensor mounting holes are internally provided with moisture sensors, salt sensors and temperature sensors.

7. The temperature zoned control device for material testing in water-salt-temperature coupled environmental action according to claim 6, characterized in that: The moisture sensors, salt sensors, temperature sensors, displacement sensors, pressure sensors and liquid level indicators are connected to the corresponding interfaces of the external data acquisition and monitoring system through lines.

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