Temperature-adjusting sealing structure and accelerated loading test system

Abstract

The utility model provides a temperature adjusting sealing structure and an acceleration loading test system. The temperature adjusting sealing structure comprises a machine shell, an air conditioning unit and a geothermal assembly. Wherein the lower bottom of the shell is open, and the peripheral edge of the bottom wall hermetically abuts against a test pavement; a return air inlet is formed in the other end of the shell; the air conditioning unit is arranged on the outer side of the machine shell and provided with an air supply pipeline and an air return pipeline, the air supply pipeline is connected with the air supply opening, and the air return pipeline is connected with the air return opening. The geothermal assembly is buried under a test pavement; the air conditioning unit and the geothermal assembly are used for regulating and controlling the air temperature and the road surface temperature in the machine shell in a matched mode. According to the temperature adjusting sealing structure provided by the utility model, the enclosure is used for creating a closed space for the loading device, the air temperature in the enclosure is adjusted through the air conditioning unit, and the pavement temperature is adjusted and controlled through the geothermal assembly, so that actual pavement conditions under different regional environment conditions can be simulated, and the limitation of environmental factors on an accelerated loading test is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of road performance testing technology, specifically relating to a temperature-regulating sealing structure and an accelerated loading test system. Background Technology

[0002] Accelerated loading tests are used to comprehensively simulate the actual service conditions of pavement materials and structures under special geographical environments. They simulate different axle load compositions from various vehicles and employ full-scale testing to conduct scientific research on the accelerated loading of new structures, materials, and processes. During the test, a loading vehicle simulates real axle loads on the test pavement to test the performance of pavement materials and structures. Currently, accelerated loading tests can largely replicate or closely approximate real traffic conditions in terms of axle load, vehicle speed, and pavement load. However, because the performance of pavement materials and structures is closely related to ambient and pavement temperatures, accurate test data can only be obtained through local testing methods. It is currently impossible to conduct tests at the same test site for different regional environmental conditions, resulting in significant limitations that urgently need to be addressed. Utility Model Content

[0003] This utility model provides a temperature-controlled sealing structure and an accelerated loading test system, which aims to reduce the limitations of actual environmental factors on accelerated loading tests and improve the adaptability of accelerated loading tests to different regional environmental conditions.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a temperature-regulating and sealing structure is provided, including a casing, an air conditioning unit, and a geothermal component; wherein, the bottom of the casing is open and the four edges of the bottom wall are sealed and pressed against the test road surface; one end of the casing is provided with an air supply port and the other end is provided with a return air port; the air conditioning unit is located on the outside of the casing and has an air supply duct and a return air duct, the air supply duct being connected to the air supply port and the return air duct being connected to the return air port; the geothermal component is buried under the test road surface; wherein, the air conditioning unit and the geothermal component are used to cooperate in regulating the air temperature inside the casing and the road surface temperature.

[0005] In conjunction with the first aspect, in one possible implementation, an air conditioning unit is provided on each side of the casing, the air supply ducts of the two air conditioning units are connected to the air supply outlet, and the return air ducts of the two air conditioning units are connected to the return air outlet; wherein, the two air conditioning units are used to operate alternately.

[0006] In some embodiments, air valves are installed in both the return air duct and the supply air duct of the two air conditioning units.

[0007] For example, the geothermal component includes fluid pipelines uniformly distributed beneath the test pavement, within which a heat transfer medium or a coolant is circulated to heat or cool the test pavement.

[0008] In some embodiments, the housing includes two side plates, two end plates, and a top cover; the two side plates are connected by a number of spaced crossbeams, the two end plates are respectively encapsulated at both ends of the two side plates, and the four edges of the top cover are respectively sealed to the top surfaces of the two side plates and the two end plates; wherein, both the side plates and the end plates are provided with thermal insulation layers.

[0009] In one possible implementation, rigid polyurethane foam is provided within the insulation interlayer.

[0010] In some embodiments, a number of supports are arranged circumferentially at intervals on the bottom of the casing, and a base is provided on the test surface for corresponding connection of each support; wherein, each base and its corresponding support are provided with insulation walls on both sides, and the upper and lower surfaces of the insulation walls are respectively sealed and pressed against the bottom surface of the casing and the test surface.

[0011] For example, a sealing gasket is provided on the test surface along the bottom circumference of the casing, and the sealing gasket is in contact with the insulation wall.

[0012] For example, the casing contains a first temperature sensor and a second temperature sensor. The first temperature sensor is used to detect the air temperature inside the casing, and the second temperature sensor is used to detect the road surface temperature.

[0013] The beneficial effects of the temperature-regulating sealing structure provided by this utility model are as follows: Compared with the prior art, the temperature-regulating sealing structure of this utility model utilizes the casing sealing and pressing against the test road surface to obtain a sealed space for placing the loading device. On this basis, the air temperature inside the casing is regulated by the air conditioning unit supplying air to the air outlet through the air supply duct and returning air to the air conditioning unit through the return air outlet. Furthermore, the geothermal components buried under the test road surface can regulate the road surface temperature, thereby simulating the actual road surface conditions under different regional environmental conditions, reducing the limitations of environmental factors on accelerated loading tests, and enabling the accelerated loading test system in the same site to meet the road performance test requirements under different regional environmental conditions, thereby improving the data accuracy and scientific nature of accelerated loading tests.

[0014] Secondly, this utility model embodiment also provides an accelerated loading test system, including the above-mentioned temperature-controlled sealing structure.

[0015] The beneficial effects of the accelerated loading test system provided by this utility model are as follows: Compared with the prior art, the accelerated loading test system of this utility model adopts the above-mentioned temperature-regulating and sealing structure. It uses the casing to seal and press against the test road surface to obtain a closed space for placing the loading device. On this basis, the air temperature inside the casing is regulated by the air conditioning unit supplying air to the air outlet through the air supply duct and returning air to the air conditioning unit through the return air outlet. Furthermore, the geothermal components buried under the test road surface can regulate the road surface temperature, thereby simulating the actual road surface conditions under different regional environmental conditions, reducing the limitations of environmental factors on the accelerated loading test, and enabling the accelerated loading test system in the same site to meet the road performance test requirements under different regional environmental conditions, thereby improving the data accuracy and scientific nature of the accelerated loading test. Attached Figure Description

[0016] Figure 1 A longitudinal sectional view of the temperature-regulating sealing structure provided in this embodiment of the utility model;

[0017] Figure 2 A cross-sectional view of the temperature-regulating sealing structure provided in this embodiment of the utility model;

[0018] Figure 3 This is a top view of the temperature-regulating sealing structure provided in an embodiment of the present invention.

[0019] In the diagram: 10. Housing; 101. Air supply outlet; 102. Air return outlet; 11. Side panel; 12. End panel; 13. Top cover; 14. Crossbeam; 15. Insulation interlayer; 16. Support; 17. First temperature sensor; 18. Second temperature sensor; 20. Air conditioning unit; 21. Air supply duct; 22. Air return duct; 23. Air valve; 30. Geothermal component; 40. Test road surface; 41. Base; 42. Insulation wall; 43. Sealing gasket. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] It should be noted that when an element is referred to as being "set on" or "connected to" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0022] Please refer to the following: Figures 1 to 3 The temperature-regulating sealing structure provided by this utility model will now be described. The temperature-regulating sealing structure includes a housing 10, an air conditioning unit 20, and a geothermal component 30. The housing 10 has an open bottom and its bottom wall edges are sealed against the test road surface 40. One end of the housing 10 has an air supply port 101, and the other end has a return air port 102. The air conditioning unit 20 is located outside the housing 10 and has an air supply duct 21 and a return air duct 22. The air supply duct 21 connects to the air supply port 101, and the return air duct 22 connects to the return air port 102. The geothermal component 30 is buried under the test road surface 40. The air conditioning unit 20 and the geothermal component 30 are used to coordinate and regulate the air temperature inside the housing 10 and the road surface temperature.

[0023] It should be noted that there are usually two types of accelerated loading tests: linear accelerated loading and circular accelerated loading. This embodiment is applicable to the linear accelerated loading test. The loading is carried out by running along a vertically set circular track. The test surface 40 is loaded in the lower straight section of the circular track. Therefore, the housing 10 is a lower open structure consisting of four side walls and a cover plate. The lower ends of the four side walls are sealed with the test surface 40, such as by filling the gaps with sealant or foam. This makes the entire loading device placed in a closed space.

[0024] It should be understood that the air conditioning unit 20 can generate circulating air within the casing 10 through the supply air duct 21 and return air duct 22, thereby regulating the air temperature within the casing 10 and causing changes in the surface temperature of the test road surface 40, i.e., the road surface temperature. The geothermal component 30, buried underground, is used to transfer heat from the bottom up to regulate the ground temperature. Thus, the combined effect of the air conditioning unit 20 and the geothermal component 30 can improve the efficiency of road surface temperature regulation. In addition, since the actual road surface temperature in extremely cold regions is below zero, it is impossible to achieve such low-temperature conditions by relying solely on the air conditioning unit 20. Therefore, the ground temperature can be regulated for low-temperature requirements by introducing a refrigerant, such as a coolant, into the geothermal component 30. This can meet the testing requirements of both high-temperature and low-temperature environments.

[0025] Compared with the prior art, the temperature-regulating sealing structure provided in this embodiment utilizes the housing 10 to seal and press against the test road surface 40 to obtain a sealed space for placing the loading device. On this basis, the air temperature inside the housing 10 is regulated by the air conditioning unit 20 supplying air to the air outlet 101 through the air supply duct 21 and returning air to the air conditioning unit 20 through the return air outlet 102 through the return air duct 22. Furthermore, the road surface temperature can be regulated by the geothermal component 30 buried under the test road surface 40. This allows for the simulation of actual road surface conditions under different regional environmental conditions, reducing the limitations of environmental factors on accelerated loading tests. Consequently, the accelerated loading test system in the same site can meet the road performance test requirements under different regional environmental conditions, improving the accuracy and scientific nature of the accelerated loading test data.

[0026] In some embodiments, see Figure 2 and Figure 3 An air conditioning unit 20 is installed on each side of the casing 10. The air supply ducts 21 of the two air conditioning units 20 are connected to the air outlet 101, and the return air ducts 22 of the two air conditioning units 20 are connected to the return air outlet 102. The two air conditioning units 20 are used for alternating operation. Since the air conditioning units 20 need to cool during low-temperature environment testing, the moisture in the air during long-term operation will cause the defrost unit of the air conditioning unit 20 to freeze. Therefore, the air conditioning units 20 need to be shut down periodically for defrosting and de-icing. In order to ensure that the air conditioning units 20 maintain the low temperature of the air inside the casing 10, the two air conditioning units 20 are used to operate alternately to ensure the continuity of cooling of the air inside the casing 10. At the same time, it allows the two air conditioning units 20 to be shut down alternately for defrosting and de-icing, avoiding the defrosting and de-icing process from affecting the low-temperature environment inside the casing 10, thereby ensuring the continuity of the accelerated loading test under low-temperature conditions and the accuracy of the test data.

[0027] It should be noted that, as Figure 3As shown, both the return air duct 22 and the supply air duct 21 of the two air conditioning units 20 are equipped with air valves 23. By setting the air valves 23, the return air duct 22 and the supply air duct 21 can be opened or closed, thereby preventing the supply and return air of the air conditioning unit 20 from entering the air conditioning unit 20 in the shutdown state for defrosting and de-icing. The air valves 23 used here can be electric valves. When the air conditioning unit 20 is turned on, the air valve 23 opens accordingly, and when it is turned off, the air valve 23 closes accordingly, thereby improving the stability of the alternating operation of the two air conditioning units 20.

[0028] For some possible implementations, please refer to [link / reference]. Figure 1 and Figure 2 The geothermal component 30 includes a liquid flow pipeline uniformly distributed beneath the test pavement 40. A heat transfer medium or a refrigerant circulates within the liquid flow pipeline to heat or cool the test pavement 40. When a heat transfer medium is introduced into the liquid flow pipeline, the test pavement 40 is heated, thereby increasing its temperature. When a refrigerant is introduced, the test pavement 40 is cooled, thus achieving a target low temperature. Specifically, the liquid flow pipeline can be connected to a boiler using boiler hot water as the heat transfer medium, and simultaneously connected to a refrigeration device using a refrigerant as the refrigerant, thereby meeting the high and low temperature control requirements of the test pavement 40. The refrigerant and heat transfer medium can share the same liquid flow pipeline, or they can be arranged in separate liquid flow pipelines. To improve the ease of pipeline layout, the method of sharing a single liquid flow pipeline for both refrigerant and heat transfer medium is preferred. This also increases the effective length of the liquid flow pipeline, thereby improving the temperature control efficiency of the heating component for the test pavement 40.

[0029] As one specific embodiment of the aforementioned housing 10, please refer to Figure 1 and Figure 2 The casing 10 includes two side plates 11, two end plates 12, and a top cover 13. The two side plates 11 are connected by several spaced-apart crossbeams 14. The two end plates 12 are respectively encapsulated at both ends of the two side plates 11. The four edges of the top cover 13 are sealed to the top surfaces of the two side plates 11 and the two end plates 12. Both the side plates 11 and the end plates 12 are provided with thermal insulation layers 15. Due to the large length-to-width ratio of the casing 10, the side plates 11 can adopt a multi-segment splicing structure. Here, the side plates 11 and the end plates 12 are set as a sandwich structure to improve the thermal insulation effect, which can reduce the energy loss caused by temperature exchange between the inside of the casing 10 and the outside, thereby achieving the purpose of energy saving.

[0030] It should be noted that, in order to further improve the thermal insulation performance of the casing 10 and reduce energy consumption, rigid polyurethane foam is provided inside the aforementioned insulation interlayer 15. Rigid polyurethane foam is lightweight, has strong adhesion, and good thermal insulation performance. Filling the insulation layer with rigid polyurethane foam can not only improve the thermal insulation performance of the casing 10, thereby reducing the energy consumption for maintaining the target road surface temperature, but also help improve the structural strength of the side plate 11 and end plate 12, thereby improving the structural stability of the casing 10.

[0031] In some embodiments, please refer to Figure 1 and Figure 2 The bottom of the casing 10 is provided with several supports 16 spaced circumferentially, and the test surface 40 is provided with bases 41 for corresponding connection to each support 16. Each base 41 and its corresponding support 16 are provided with insulation walls 42 on both sides. The upper and lower surfaces of the insulation walls 42 are respectively sealed and pressed against the bottom surface of the casing 10 and the test surface 40. The casing 10 is fixed to the base 41 by the supports 16 to achieve a reliable connection with the test surface 40. On this basis, the gap between the bottom of the casing 10 and the test surface 40 is filled with sealant or foam to seal it. At the same time, the insulation walls 42 are provided on both sides of the base 41 to prevent the internal temperature of the casing 10 from being transferred to the outside through the base 41, which is beneficial to improving the insulation performance of the casing 10.

[0032] Specifically, in combination Figure 1 and Figure 2 In this embodiment, a sealing gasket 43 is provided along the bottom circumference of the test road surface 40 and the casing 10, and the sealing gasket 43 is connected to the insulation wall 42. Specifically, the sealing gasket 43 can be made of phenolic foam insulation material such as PF insulation board. The sealing gasket 43 seals the gap between the test road surface 40 and the lower end of the casing 10, and is connected to the insulation wall 42, thereby achieving a continuous seal around the bottom of the casing 10, thus improving the insulation performance of the casing 10.

[0033] It is necessary to understand that, such as Figure 2As shown, in this embodiment, a first temperature sensor 17 and a second temperature sensor 18 are provided inside the housing 10. The first temperature sensor 17 is used to detect the air temperature inside the housing 10, and the second temperature sensor 18 is used to detect the road surface temperature. The first temperature sensor 17 is configured to monitor the air temperature inside the housing 10 in real time and feeds the monitoring data back to the air conditioning unit 20, thereby adjusting the operating power of the air conditioning unit 20. The second temperature sensor 18 is located near the test road surface 40 to monitor the road surface temperature in real time and transmits the monitoring data to the geothermal component 30 (specifically, a refrigerant and heat transfer medium supply device). This allows the geothermal component 30 to adaptively adjust its power consumption based on the ground temperature, thereby achieving adaptive control of the air temperature inside the housing 10 and the ground temperature, which helps reduce power consumption and improve temperature control accuracy.

[0034] Based on the same inventive concept, combined with Figures 1 to 3 It is understood that this application embodiment also provides an accelerated loading test system, including the above-mentioned temperature-controlled sealing structure.

[0035] Compared with the prior art, the accelerated loading test system provided by this utility model adopts the above-mentioned temperature-regulating and sealing structure. The housing 10 is sealed and pressed against the test road surface 40 to obtain a closed space for placing the loading device. On this basis, the air temperature inside the housing 10 is regulated by the air conditioning unit 20 supplying air to the air outlet 101 through the air supply duct 21 and returning air to the air conditioning unit 20 through the return air outlet 102 through the return air duct 22. The geothermal component 30 buried under the test road surface 40 can regulate the road surface temperature, thereby simulating the actual road surface conditions under different regional environmental conditions, reducing the limitations of environmental factors on the accelerated loading test, and enabling the accelerated loading test system in the same site to meet the road performance test requirements under different regional environmental conditions, thereby improving the data accuracy and scientific nature of the accelerated loading test.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A temperature-regulating and sealing structure, characterized in that, The system includes a casing, an air conditioning unit, and a geothermal component. The casing has an open bottom and its bottom walls are sealed around the perimeter, pressing against the test road surface. One end of the casing has an air supply outlet, and the other end has a return air outlet. The air conditioning unit is located outside the casing and has an air supply duct and a return air duct; the air supply duct connects to the air supply outlet, and the return air duct connects to the return air outlet. The geothermal component is buried beneath the test road surface. The air conditioning unit and the geothermal component work together to regulate the air temperature inside the casing and the road surface temperature.

2. The temperature-regulating sealing structure as described in claim 1, characterized in that, An air conditioning unit is provided on each side of the casing. The air supply ducts of the two air conditioning units are connected to the air supply port, and the return air ducts of the two air conditioning units are connected to the return air port. The two air conditioning units are used to operate alternately.

3. The temperature-regulating sealing structure as described in claim 2, characterized in that, Both air conditioning units are equipped with air valves in their return air ducts and supply air ducts.

4. The temperature-regulating sealing structure as described in claim 1, characterized in that, The geothermal component includes liquid flow pipelines uniformly distributed beneath the test pavement, wherein a heat transfer medium or a coolant is circulated within the liquid flow pipelines to heat or cool the test pavement.

5. The temperature-regulating sealing structure as described in claim 1, characterized in that, The housing includes two side plates, two end plates, and a top cover; the two side plates are connected by a number of spaced crossbeams, the two end plates are respectively encapsulated at both ends of the two side plates, and the four edges of the top cover are respectively sealed to the top surfaces of the two side plates and the two end plates; wherein, both the side plates and the end plates are provided with thermal insulation layers.

6. The temperature-regulating sealing structure as described in claim 5, characterized in that, The insulation interlayer contains rigid polyurethane foam.

7. The temperature-regulating sealing structure as described in claim 1, characterized in that, The bottom of the casing is provided with a number of supports spaced apart circumferentially, and the test surface is provided with a base for corresponding connection of each support; wherein, each base and its corresponding support are provided with insulation walls on both sides, and the upper and lower surfaces of the insulation walls are respectively sealed and pressed against the bottom surface of the casing and the test surface.

8. The temperature-regulating sealing structure as described in claim 7, characterized in that, A sealing gasket layer is provided on the test road surface along the bottom circumference of the machine casing, and the sealing gasket layer is in contact with the insulation wall.

9. The temperature-regulating sealing structure according to any one of claims 1-8, characterized in that, The housing is equipped with a first temperature sensor and a second temperature sensor. The first temperature sensor is used to detect the air temperature inside the housing, and the second temperature sensor is used to detect the road surface temperature.

10. An accelerated loading test system, characterized in that, Includes the temperature-regulating sealing structure as described in any one of claims 1-9.

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