Concrete environment simulation test box
By combining the inner and outer enclosures and the outer fixed enclosure, along with the dynamic isolation structure and diagonal hot and cold source design, the problems of low energy utilization and high energy consumption of existing equipment are solved, achieving efficient environmental parameter control, reducing test costs and the risk of airflow crosstalk, and improving test accuracy.
Patent Information
- Application Number
- CN202511756992.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-02-27
AI Technical Summary
Existing concrete environment simulation equipment has low energy utilization and high energy consumption. Furthermore, manually switching the position of the test block leads to leakage of hot and cold air, increasing the cost and energy consumption of the test.
An independent temperature and humidity control system is formed by the combination of an inner cover, an outer cover, and an outer fixed cover. Through a dynamic isolation structure and a diagonal cold and heat source design, cyclic freeze-thaw is achieved, reducing the number of independent temperature cavities and cold and heat modules. Combined with the low leakage characteristics of the dynamic isolation structure, energy utilization and environmental parameter control accuracy are improved.
It significantly improves energy utilization, reduces energy consumption and testing costs, enhances the accuracy of environmental parameter control, prevents airflow crosstalk, and ensures the reliability of test results.
Smart Images
Figure CN121577513A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of concrete testing equipment, specifically to a concrete environment simulation test chamber. Background Technology
[0002] In the field of construction engineering, concrete, as a core structural material, directly determines the service life and safety performance of a project. During its service life, concrete often faces complex natural environmental conditions such as freeze-thaw cycles and temperature and humidity changes, making it prone to surface cracking, strength reduction, and even structural failure. Therefore, before applying concrete, it is necessary to conduct environmental simulation tests to recreate actual working conditions and evaluate its durability properties, such as freeze-thaw resistance and impermeability. This provides a scientific basis for optimizing material formulations and selecting appropriate engineering designs. This is a crucial preliminary step to ensure the long-term stability of projects and one of the core requirements in the field of building materials testing. Currently, the mainstream concrete environment simulation equipment in the industry (especially freeze-thaw test equipment) is mainly static isolation equipment. Multiple test blocks are placed in independent sealed chambers through test block clamps. The test block positions are manually switched, and the test blocks are heated and cooled. In this process, because static isolation equipment requires a separate heating and cooling module for each independent sealed chamber, or after manually switching the test block positions, the empty chambers need to be reheated / cooled to the target temperature, resulting in an energy utilization rate of only 30%-40%. Moreover, the opening of the chambers during manual switching will cause leakage of hot and cold air, and restoring the target temperature requires an additional 20%-30% of energy, which significantly increases the test cost and energy consumption. Summary of the Invention
[0003] This application provides a concrete environment simulation test chamber, which can reduce energy consumption and test costs, and improve the accuracy of environmental parameter control.
[0004] The concrete environment simulation test chamber provided in this application includes: a main frame, wherein the main frame includes a temperature control cabinet and a device cabinet; The test block loading unit includes a platform, a linkage clamping mechanism, and a dynamic isolation cover. The platform includes a circular carrier plate and a partition assembly. The circular carrier plate is rotatably mounted inside the temperature control cabinet. The partition assembly is located on top of the circular carrier plate and divides it into multiple test block placement areas. The linkage clamping mechanism is located in the test block placement area and is used to clamp concrete test blocks. The dynamic isolation cover includes an inner cover, an outer cover, and a reset component. The inner cover is located outside the partition assembly and is fixed relative to the partition assembly. The sidewall of the inner cover has multiple spaced-apart inner windows that communicate with the test block placement areas. The outer cover is rotatably mounted outside the inner cover and has multiple spaced-apart outer windows on its sidewall. The reset component connects the inner cover and the outer cover and can drive the outer cover to rotate periodically relative to the inner cover, so as to periodically open and close the inner windows. An outer fixed cover is movably disposed inside the temperature control cabinet. The outer fixed cover has a closed cavity and can move within the temperature control cabinet to open and close the outer cover. A temperature and humidity control module is disposed inside the outer cover, and the temperature and humidity control module is used to control the temperature and humidity inside the cavity of the outer cover.
[0005] In addition, the concrete environment simulation test chamber provided in this application may also have the following additional technical features: In one alternative embodiment, the concrete environment simulation test chamber further includes a drive unit and a control unit. The drive unit includes a rotating mechanism and a lifting mechanism. The rotating mechanism is located inside the device cabinet and is connected to the circular carrier plate to drive the circular carrier plate to rotate. The lifting mechanism is located in the temperature control cabinet and is connected to the outer fixed cover to drive the outer fixed cover to move along the height direction of the temperature control cabinet. The control unit is electrically connected to the drive unit, the test block loading unit, and the temperature and humidity control module, respectively, to receive status signals from each component and output control commands.
[0006] In one optional embodiment, the outer cover includes multiple outer partitions, which are spaced apart on the inner wall of the outer cover. When the outer cover closes the outer cover body, the outer partitions correspond to the positions of the partition assemblies, the outer wall of the outer cover body is in sealed contact with the outer partitions, and the friction between the outer cover body and the outer partitions can drive the outer cover body to rotate relative to the inner cover body. The reset member is an elastic member, and in its natural state, the inner window of the inner cover body overlaps with the outer window of the outer cover body, and the test block placement area is in an open state.
[0007] In one optional embodiment, when the concrete environment simulation test chamber is in operation, the platform rotates and drives the inner cover to rotate synchronously. After the inner cover rotates relative to the outer cover by a preset angle, the inner window and the outer window are misaligned and close the test block placement area. At the same time, the outer cover stretches / compresses the elastic element. After the inner cover continues to rotate by a preset angle, the stretched / compressed elastic element causes the inner cover to rotate in the opposite direction due to the restoring force, so that the inner window and the outer window are reset to overlap and the test block placement area is opened.
[0008] In one optional embodiment, the lifting mechanism includes a guide rod, a screw, and a lifting motor. The guide rod and the screw are spaced apart in the temperature control cabinet. The outer side wall of the outer fixed cover is provided with a guide sleeve and an internal threaded sleeve. The guide sleeve is slidably connected to the guide rod, and the internal threaded sleeve is threadedly connected to the screw. The lifting motor is located on one side of the top of the temperature control cabinet and is drivenly connected to the screw.
[0009] In one alternative embodiment, the rotating mechanism includes a rotary motor disposed within the device cabinet, and a fixed shaft extending into the device cabinet is provided on one side of the bottom of the circular carrier plate, the fixed shaft being connected to the output end of the rotary motor.
[0010] In one optional embodiment, the linkage clamping mechanism includes a pressure equalization control module and multiple clamping components. The multiple clamping components are respectively disposed in multiple test block placement areas. The multiple clamping components are connected in series with each other and connected to the pressure equalization control module. The pressure equalization control module can control the clamping of the concrete test block by each clamping component to clamp it synchronously and with the same pressure, and can automatically equalize the clamping force of each clamping component when the concrete test block expands and contracts with heat.
[0011] In one alternative embodiment, the clamping assembly includes a vertical plate, a cylinder, and a clamping plate. The vertical plates are arranged in pairs at intervals on the circular carrier plate. The cylinders are respectively located on the opposite sides of the vertical plates, and the telescopic ends of the cylinders pass through the vertical plates and are connected to the clamping plates. The multiple cylinders in the multiple test block placement areas are connected in series through air pipes. The pressure equalization control module includes an air storage tank, a precision pressure reducing valve, and a pressure sensor. The air storage tank is connected to the cylinders connected in series via an air pipe, and the pressure sensor can monitor the pressure in the air pipe in real time. When the concrete test block expands and contracts due to heat, if the pressure in one cylinder increases, the excess gas flows to the cylinder with lower pressure through the series pipeline. The pressure sensor transmits the signal to the control unit, and the pressure reducing valve is used for fine-tuning to achieve automatic pressure equalization of each cylinder.
[0012] In one optional embodiment, the temperature and humidity control module includes a cold source, a heat source, and a humidity control component. The cold source and the heat source are arranged diagonally inside the outer fixed cover and are respectively connected to the control unit. The humidity control component is disposed in the outer fixed cover and connected to the control unit for regulating the humidity inside the outer fixed cover. A pressure unit is also provided in the test block placement area. The pressure unit is connected to the control unit and can apply pressure to the concrete test block placed in the test block placement area.
[0013] In one optional embodiment, the top side of the outer cover is provided with multiple arc-shaped limiting grooves circumferentially, the arc-shaped limiting grooves being coaxially arranged with the outer cover. The top side of the inner cover is provided with multiple guide posts circumferentially, the guide posts being respectively inserted into the arc-shaped limiting grooves at corresponding positions, and the top of the guide posts extending upward out of the outer cover and being fitted with anti-detachment caps. When the circular carrier plate drives the inner cover to rotate and causes the inner window and the outer window to overlap or close, the guide posts move synchronously with the inner cover and abut against the ends of the arc-shaped limiting grooves.
[0014] The beneficial effects of this application are as follows: The concrete environment simulation test chamber in this application forms a completely independent internal and external temperature chamber system through the cooperation of an inner chamber, an outer chamber, and an outer fixed cover. The inner chamber is the test block placement area, and the outer chamber is the relative space between the outer fixed cover and the outer chamber, which helps to ensure independent temperature and humidity control in each area without interference. The outer chamber can rotate periodically relative to the inner chamber to periodically open and close the outer window and the inner window. The temperature and humidity control module is set inside the outer fixed cover. Therefore, there is no need to set up independent temperature chambers and heating / cooling modules for multiple test blocks. Cyclic freeze-thaw is achieved only by using diagonal heat and cold sources in conjunction with the rotation of the platform. Combined with the low leakage characteristics of the dynamic isolation structure, the energy utilization rate is significantly improved compared with static equipment, greatly reducing energy consumption and test costs. The window misalignment sealing mechanism effectively prevents airflow crosstalk, thereby improving the accuracy of environmental parameter control.
[0015] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of a concrete environment simulation test chamber in one specific embodiment; Figure 2 This is a three-dimensional structural diagram of a temperature control cabinet in one specific embodiment; Figure 3 A schematic diagram of the fit between the outer cover and the test block mounting section; Figure 4 This is a schematic diagram of the structure of the outer fixed cover in a specific embodiment; Figure 5 This is a three-dimensional structural diagram of the test block loading section in one specific embodiment; Figure 6 This is a schematic diagram of the clamping component in one specific embodiment; Figure 7 This is a schematic diagram of the inner and outer covers when they are not connected. Figure 8 This is a structural diagram of the inner and outer covers at the top connection point. Figure 9 This is a schematic diagram showing the usage status of the test block loading unit during use. Figure 10 This is a schematic diagram of the pressure unit in one specific embodiment.
[0017] Reference numerals: Temperature control cabinet 1, Device cabinet 2, Platform 3, Circular carrier plate 31, Partition assembly 32, Column 321, Inner partition 322, Dynamic isolation cover 4, Inner cover 41, Inner window 411, Guide column 412, Outer cover 42, Outer window 421, Arc-shaped limiting groove 422, Inner temperature cavity 43, Anti-detachment cap 44, Outer fixed cover 5, Outer partition 51, Outer temperature cavity 52, Lifting motor 6, Guide rod 61, Screw 62, Guide sleeve 63, Internal threaded sleeve 64, Clamping assembly 7, Upright plate 71, Cylinder 72, Clamping plate 73, Pneumatic lifting frame 8, Lifting rod 81, Rotary joint 82, Base plate 91, Oil cylinder 92, Pressure plate 93, Concrete test block 10.
[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation
[0019] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0020] It should be understood that the described embodiments are merely some embodiments of this application, and not all embodiments. All other technical solutions obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0021] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.
[0022] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0023] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.
[0024] like Figure 1-10 As shown in the embodiment of this application, a concrete environment simulation test chamber is provided. The concrete environment simulation test chamber mainly includes a main frame, a test block loading part, an outer fixed cover 5, and a temperature and humidity control module. The main frame includes a temperature control cabinet 1 and a device cabinet 2. The test block loading part includes a platform 3, a linkage clamping mechanism, and a dynamic isolation cover 4. The platform 3 includes a circular platform 31 and a partition assembly 32. The circular platform 31 is rotatably disposed inside the temperature control cabinet 1. The partition assembly 32 is disposed on the top of the circular platform 31 and divides it into multiple test block placement areas. The linkage clamping mechanism is disposed in the test block placement area and is used to clamp concrete test blocks 10. The dynamic isolation cover 4 includes an inner cover 41, an outer cover 42, and a reset component. The inner cover 41 is disposed outside the partition assembly 32 and opposite to it. The partition assembly 32 is fixed. The side wall of the inner cover 41 is provided with multiple inner windows 411 arranged at intervals and communicating with the test block placement area. The outer cover 42 is rotatably disposed outside the inner cover 41, and the side wall of the outer cover 42 is provided with multiple outer windows 421 at intervals. The reset member connects the inner cover 41 and the outer cover 42 and can drive the outer cover 42 to rotate periodically relative to the inner cover 41, so as to periodically open and close the outer windows 421 and the inner windows 411. The outer fixed cover 5 is movably disposed in the temperature control cabinet 1. The outer fixed cover 5 has a closed cavity and can move in the temperature control cabinet 1 to open and close the outer cover 42. The temperature and humidity control module is disposed in the outer fixed cover 5 and is used to control the temperature and humidity in the cavity of the outer fixed cover 5.
[0025] The main frame includes a temperature control cabinet 1 and a device cabinet 2 arranged vertically. Both the temperature control cabinet 1 and the device cabinet 2 have cabinet doors on the front and are equipped with cabinet door locks. The temperature control cabinet 1 has a control panel that is connected to the control unit in the following embodiment. The device cabinet 2 is used to support the temperature control cabinet 1 and can accommodate functional components. The two are fixedly connected by bolts or the cabinet body is an integrated design, thus forming an integrated structure. At the same time, the device cabinet 2 is provided with an electrical box installation area to ensure that the functional components are compactly arranged and easy to maintain.
[0026] like Figure 5-6 As shown, the partition assembly 32 is mounted on the circular carrier plate 31, dividing the circular carrier plate 31 into n test block placement areas along the circumference, where n is an even number and n≥4. In this embodiment, the number of test block placement areas on the circular carrier plate 31 is 4. Specifically, the partition assembly 32 includes a column 321 coaxially fixed on the circular carrier plate 31. The outer ring surface of the column 321 is provided with n inner partitions 322 evenly spaced along the circumference. The inner partitions 322 are welded to the circular carrier plate 31, dividing the circular carrier plate 31 into 4 test block placement areas. Of course, in practical applications, the number of test block placement areas can be preset according to usage requirements, such as 6 or 8 test block placement areas, etc. Only the number of inner partitions 322 needs to be adjusted. This article does not make a specific limitation on this.
[0027] In this embodiment, the concrete environment simulation test chamber forms a completely independent internal and external temperature chamber system 52 through the cooperation of the inner cover 41, the outer cover 42, and the outer fixed cover 5. The inner cavity is the test block placement area, and the outer cavity is the relative space between the outer fixed cover 5 and the outer cover 42, which helps to ensure independent temperature and humidity control in each area without interference. The outer cover 42 can rotate periodically relative to the inner cover 41 to periodically open the outer window 421 and close the inner window 411. The temperature and humidity control module is set inside the outer fixed cover 5. Therefore, there is no need to set up independent temperature chambers and heating and cooling modules for multiple test blocks. Cyclic freeze-thaw is achieved only by the diagonal heat and cold sources and the rotation of the platform 3. Combined with the low leakage characteristics of the dynamic isolation structure, the energy utilization rate is significantly improved compared with static equipment, greatly reducing energy consumption and test costs. The window misalignment sealing mechanism effectively prevents airflow crosstalk, thereby improving the accuracy of environmental parameter control.
[0028] like Figure 1-2 As shown, in one specific embodiment, the concrete environment simulation test chamber further includes a drive unit and a control unit. The drive unit includes a rotating mechanism and a lifting mechanism. The rotating mechanism is located inside the device cabinet 2 and is connected to the circular carrier plate 31 for transmission and can drive the circular carrier plate 31 to rotate. The lifting mechanism is located in the temperature control cabinet 1 and is connected to the outer fixed cover 5 and can drive the outer fixed cover 5 to move along the height direction of the temperature control cabinet 1. The control unit is electrically connected to the drive unit, the test block loading unit and the temperature and humidity control module respectively, so as to receive the status signals of each component and output control commands.
[0029] like Figure 5 and Figure 9 As shown, in one specific embodiment, the outer cover 5 includes multiple outer partitions 51, which are spaced apart on the inner wall of the outer cover 5. When the outer cover 5 closes the outer cover body 42, the outer partitions 51 correspond to the positions of the partition assembly 32, the outer wall of the outer cover body 42 is in sealed contact with the outer partitions 51, and the friction between the outer cover body 42 and the outer partitions 51 can drive the outer cover body 42 to rotate relative to the inner cover body 41. The reset member is an elastic member. When the elastic member is in its natural state, the inner window 411 of the inner cover body 41 overlaps with the outer window 421 of the outer cover body 42, and the test block placement area is in the open state.
[0030] Specifically, the dynamic isolation cover 4 is fitted on the outside of the partition assembly 32 and the circular carrier plate 31 to seal and isolate the test block placement area when the platform 3 rotates. The outer fixed cover 5 is installed vertically and lowered inside the temperature control cabinet 1. Multiple outer partitions 51 (the same number as the inner partitions 322) are evenly spaced along the circumference inside the outer fixed cover 5. When the outer fixed cover 5 descends to the inner bottom wall of the temperature control cabinet 1, the test block loading part is completely accommodated inside the outer fixed cover 5. The inner top wall of the outer fixed cover 5 is sealed and fitted together with the upper end face of the test block loading part. The outer partitions 51 and the dynamic isolation cover 4 of the test block loading mechanism abut against each other, sealing and dividing the annular space between the outer fixed cover 5 and the test block loading mechanism into multiple external temperature cavities 52. The external temperature cavities 52 are the relative spaces between the outer fixed cover 5 and the outer cover body 42.
[0031] Furthermore, the inner cover 41 is a cylindrical structure with a top-sealed design. The inner cover 41 is fitted onto the circular carrier plate 31 from top to bottom. The partition assembly 32 is sealed and fitted together with the inner end face of the inner cover 41, sealing and shielding each test block placement area to form an independent inner temperature chamber 43. The inner cover 41 has four inner windows 411 along the circumferential direction, each communicating with the corresponding inner temperature chamber 43. The outer cover 42 is rotatably fitted onto the inner cover 41. The inner ring wall of the outer cover 42 is sealed and fitted together with the outer wall of the inner cover 41, blocking and sealing the outer opening of the inner windows 411. When the test block loading part is completely contained within the outer fixed cover 5, the outer ring surface of the outer cover 42 is in sealed contact with the outer partition 51, and the friction between the outer ring surface of the outer cover 42 and the outer partition 51 is greater than the friction between the inner cover 41 and the outer cover 42.
[0032] The outer cover 42 has an outer window 421 that matches the inner window 411 on its annular wall. An elastic component connects the inner cover 41 and the outer cover 42. In this embodiment, the elastic component is a torsion spring disposed between the inner cover 41 and the outer cover 42. In its natural state, the elastic component controls the dynamic isolation cover 4 to make the outer window 421 overlap with the inner window 411 and keep it open. When the test block stage 3 drives the inner cover 41 to rotate, it will compress / stretch the elastic component, causing the overlapping window to be blocked by the corresponding cover, closing the inner temperature cavity 43. The inner cover 41, which continues to rotate while the inner temperature cavity 43 is closed, will drive the outer cover 42 to rotate synchronously. After the inner cover 41 is driven to rotate a preset angle, the compressed / stretched elastic component will drive the inner cover 41 to drive the circular carrier plate 31 to rotate in the opposite direction under the action of elastic restoring force, so that the inner window 411 and the outer window 421 are reset to overlap, opening the inner temperature cavity 43 and connecting the inner temperature cavity 43 with the corresponding outer temperature cavity 52.
[0033] like Figure 2-7 As shown, in one specific embodiment, when the concrete environment simulation test chamber is in working condition, the platform 3 rotates and drives the inner cover 41 to rotate synchronously. After the inner cover 41 rotates relative to the outer cover 42 by a preset angle, the inner window 411 and the outer window 421 are misaligned and close the test block placement area. At the same time, the outer cover 42 stretches / compresses the elastic element. After the inner cover 41 continues to rotate by a preset angle, the stretched / compressed elastic element causes the inner cover 41 to rotate in the opposite direction due to the restoring force, so that the inner window 411 and the outer window 421 are reset and overlapped, and the test block placement area is opened.
[0034] like Figure 1-2 As shown, in one specific embodiment, the lifting mechanism includes a guide rod 61, a screw 62, and a lifting motor 6. The guide rod 61 and the screw 62 are spaced apart on the temperature control cabinet 1. The outer side wall of the outer fixed cover 5 is respectively provided with a guide sleeve 63 and an internal threaded sleeve 64. The guide sleeve 63 is slidably connected to the guide rod 61, and the internal threaded sleeve 64 is threadedly connected to the screw 62. The lifting motor 6 is located on the top side of the temperature control cabinet 1 and is drivenly connected to the screw 62.
[0035] Specifically, the lifting mechanism includes guide rods 61 and screws 62 symmetrically installed in the temperature control cabinets 1 on the left and right sides of the outer fixed cover 5. The guide rods 61 are fixedly installed vertically in the temperature control cabinet 1, and multiple guide sleeves 63 are slidably fitted on the guide rods 61 vertically. The guide sleeves 63 are fixedly connected to the outer wall of the outer fixed cover 5. The screws 62 are rotatably installed vertically in the temperature control cabinet 1, and multiple internal thread sleeves 64 are threaded on the screws 62. The internal thread sleeves 64 are fixedly connected to the outer wall of the adjacent outer fixed cover 5. The top of the screws 62 extends upward out of the temperature control cabinet 1 and is connected to a lifting motor 6. The lifting motor 6 is electrically connected to the control unit. The control unit can control the lifting and lowering of the outer fixed cover 5 by driving the screws 62 to rotate through the lifting motor 6.
[0036] In addition, the rotating mechanism includes a rotary motor (not shown in the figure), which is located inside the device cabinet 2. A fixed shaft extending into the device cabinet 2 is provided on one side of the bottom of the circular carrier plate 31, and the fixed shaft is connected to the output end of the rotary motor. The circular carrier plate 31 is rotatably mounted on the inner bottom wall of the temperature control cabinet 1. The rotary motor is electrically connected to the control unit. The fixed shaft is coaxially fixedly mounted on the bottom surface of the circular carrier plate 31. The inner bottom wall of the temperature control cabinet 1 has a shaft hole communicating with the device cabinet 2 along the vertical direction. The fixed shaft is rotatably mounted in the shaft hole through a bearing, and the circular carrier plate 31 is in sealed contact with the inner bottom wall of the temperature control cabinet 1. The fixed shaft extends downward into the device cabinet 2 and is connected to the rotary motor. The control unit can drive the circular carrier plate 31 to rotate at a fixed time and angle through the rotary motor.
[0037] like Figure 5-6 As shown, in one specific embodiment, the linkage clamping mechanism includes a pressure equalization control module and multiple clamping components 7. The multiple clamping components 7 are respectively disposed in multiple test block placement areas. The multiple clamping components 7 are connected in series with each other and connected to the pressure equalization control module. The pressure equalization control module can control the clamping of the concrete test block 10 by each clamping component 7 synchronously and with the same pressure, and can automatically equalize the clamping force of each clamping component 7 when the concrete test block 10 expands and contracts with heat.
[0038] like Figure 5-6 As shown, in one specific embodiment, the clamping assembly 7 includes a vertical plate 71, a cylinder 72, and a clamping plate 73. The vertical plates 71 are arranged in pairs at intervals on the circular carrier plate 31. The cylinders 72 are respectively disposed on the opposite sides of the vertical plates 71, and the telescopic ends of the cylinders 72 pass through the vertical plates 71 and are connected to the clamping plate 73. Multiple cylinders 72 in multiple test block placement areas are connected in series through air pipes. The pressure equalization control module includes an air tank, a precision pressure reducing valve, and a pressure sensor. The air tank is connected to the series-connected cylinders 72 through air pipes, and the pressure sensor can monitor the pressure in the air pipes in real time.
[0039] Specifically, the clamping component 7 in this embodiment is a pneumatic clamping component, including two vertical plates 71 that are parallel and spaced apart and installed on a circular carrier plate 31. The area enclosed by the two vertical plates 71 is the placement area for the concrete test block 10. A cylinder 72 is vertically installed on the outer end face of each of the two vertical plates 71. The telescopic end of the cylinder 72 passes inward through the vertical plate 71 and is fitted with a clamping plate 73. All the cylinders 72 in the four temperature zones are connected in series through air pipes.
[0040] The gas storage tank of the pressure equalization control module is connected to the series-connected cylinders 72 via gas pipes. The pressure reducing valve is set to clamping pressure of 0.3 MPa, and the pressure sensor monitors the pressure in the gas pipes in real time. When the concrete specimen 10 expands and contracts due to heat, if the pressure of a certain cylinder 72 increases, the excess gas flows to the cylinder 72 with lower pressure through the series pipeline. The pressure sensor transmits the signal to the control unit, and the pressure reducing valve is used for fine adjustment to achieve automatic pressure equalization of each cylinder 72. For example, when the first inner temperature zone is connected to the outer temperature zone with a heat source, the third inner temperature zone will be connected to the outer temperature zone with a cold source. Thus, when the concrete specimen 10 in the first inner temperature zone is heated and expands due to heat, the concrete specimen 10 in the third inner temperature zone will cool down and contract due to cold. The pressure equalization control module will replenish the excess gas in the cylinder 72 in the first inner temperature zone into the cylinder 72 in the third inner temperature zone through the series pipeline, so that the clamping components 7 in both temperature zones can effectively clamp the concrete specimen 10 according to its state.
[0041] The pressure equalization control module achieves synchronous and uniform pressure across all internal temperature zone clamping components 7 via an air tank and a precision pressure reducing valve, ensuring uniform force on the test block and preventing hidden damage during initial clamping. Furthermore, when the test block expands and contracts due to heat, the series pipeline can automatically balance the pressure of each clamping component 7 without manual adjustment. This prevents the test block from breaking due to excessive pressure and avoids displacement due to excessively low pressure, keeping the test block in a stable clamping state. This effectively reduces the repeatability error of test data and significantly improves the reliability of results.
[0042] In one specific embodiment, the temperature and humidity control module includes a cold source, a heat source, and a humidity control component. The cold source and heat source are diagonally arranged inside the outer fixed cover 5 and are respectively connected to the control unit. The humidity control component is located in the outer fixed cover 5 and connected to the control unit to regulate the humidity inside the outer fixed cover 5. This design, featuring diagonally arranged cold and heat sources and an intermediate transition temperature zone, allows the test block to undergo continuous changes in temperature during freeze-thaw cycles, avoiding the "non-realistic damage" caused by sudden heating and cooling in traditional equipment.
[0043] like Figure 5 and Figure 7-8 As shown, in one specific embodiment, the top side of the outer cover 42 is provided with multiple arc-shaped limiting grooves 422, which are coaxially arranged with the outer cover 42. The top side of the inner cover 41 is provided with multiple guide posts 412, which are respectively inserted into the corresponding arc-shaped limiting grooves 422. The top of the guide post 412 extends upward out of the outer cover 42 and is equipped with an anti-detachment cap 44. When the circular carrier plate 31 drives the inner cover 41 to rotate and causes the inner window 411 and the outer window 421 to overlap or close, the guide post 412 moves synchronously with the inner cover 41 and abuts against the end of the arc-shaped limiting groove 422.
[0044] In some other embodiments, the partition assembly 32 has a diamond-shaped insertion hole coaxially located in the center, and the inner top wall of the inner cover 41 has a plug that matches the diamond-shaped insertion hole. The dynamic isolation cover 4 is vertically raised and lowered inside the temperature control cabinet 1. When the dynamic isolation cover 4 lowers to block the test block placement area, the plug is inserted into the diamond-shaped insertion hole. Specifically: Figure 2 and Figure 7 As shown, a pneumatic lifting frame 8 is vertically installed on the top of the temperature control cabinet 1. The lifting end of the lifting frame is connected to a lifting rod 81. The lifting rod 81 extends downward into the temperature control cabinet 1 and is equipped with a rotary joint 82. The rotary joint passes through the outer fixed cover 5 and the outer cover body 42 and is fixedly connected to the inner cover body 41 of the dynamic isolation cover 4. When taking out and placing concrete test blocks 10, after the outer fixed cover 5 is raised, the pneumatic lifting frame 8 can synchronously drive the dynamic isolation cover 4 to be raised to expose the platform 3, thereby facilitating the taking out and placing of concrete test blocks 10.
[0045] In addition, the control unit is electrically connected to the lifting mechanism, rotating mechanism, temperature and humidity control module, and pressure unit, respectively, to receive status signals from each component and output control commands. Specifically: the control unit can be a PLC controller, equipped with a 7-inch control panel, and installed on the door of temperature control cabinet 1 to realize human-machine interaction; the input module of the PLC controller receives position signals (lifting mechanism limit switch, platform 3-angle encoder), temperature signals, humidity signals, and pressure signals; the output module of the PLC controller controls the start and stop of the lifting mechanism, the rotation motor speed, the start and stop of the cold and heat source, the start and stop of the humidifier, and the opening and closing of the exhaust valve; the software uses ladder diagram programming and presets various environmental simulation test programs, such as a freeze-thaw environment cycle program (e.g., 200 cycles, each cycle including 4 hours of freezing and 4 hours of thawing), and users can customize parameters and save them; the automated operation process of the PLC controller is as follows: (1) Initial state: The outer fixed cover 5 is in the raised position, the circular carrier plate 31 is stationary, and the cold and heat source and humidifier are turned off; (2) Placement of test blocks: Place four concrete test blocks 10 (size 100mm×100mm×100mm) into the four internal temperature chambers 43 (test block placement area), start the linkage clamping mechanism, and control the cylinder 72 of the pressure equalization control module to clamp the concrete test blocks 10 synchronously. (3) Sealing preparation: The control unit starts the lifting mechanism, the outer fixed cover 5 descends to the inner bottom wall of the temperature control cabinet 1, the outer partition 51 abuts against the outer cover 42, and the four inner temperature chambers 43 are respectively connected to the four outer temperature chambers 52; (4) Freeze-thaw cycle: The control unit starts the rotating motor at regular intervals to drive the circular carrier plate 31 to rotate 135°. Before the concrete specimen 10 alternately enters the external temperature chamber 52 corresponding to the cold source and the heat source, it will transition between the cold and heat sources in the external temperature chamber 52. This simulates the gradual temperature change process of outdoor concrete from low temperature at night to rising temperature during the day. This avoids the specimen being "not real" due to sudden cooling and heating, and ensures that the test results can reflect the freeze-thaw resistance of concrete in real environment. The data is more reliable. The temperature sensor monitors in real time and controls the start and stop of the cold and heat sources to maintain the set temperature. The humidity sensor monitors the humidity of the external temperature chamber 52. The humidifier and the exhaust valve work together to maintain the set humidity. (5) End of cycle: After the preset number of cycles is reached, the rotary motor stops, the outer fixed cover 5 is raised, the linkage clamping mechanism is released, and the test block is taken out to complete the test; the control unit automatically saves the test data (temperature, humidity, number of cycles) for subsequent analysis.
[0046] In addition, such as Figure 10 As shown, a pressure unit is also provided in the test block placement area. The pressure unit is connected to the control unit and can apply pressure to the concrete test block 10 placed in the test block placement area. Specifically: the pressure unit includes two base plates 91 that are parallel and spaced apart and installed on a circular carrier plate 31. The two base plates 91 and the two vertical plates 71 of the pneumatic holding assembly are arranged in a cross direction. The concrete test block 10 placement area is also located between the two base plates 91. A hydraulic cylinder 92 is vertically installed on the outer end face of each of the two base plates 91. The hydraulic cylinder 92 is connected to a hydraulic control module through an oil pipe. The hydraulic control module is electrically connected to the control unit and is used to control the pushing pressure of the hydraulic cylinder 92. The telescopic end of the hydraulic cylinder 92 passes inward through the base plate 91 and is equipped with a pressure plate 93 for contacting the concrete test block 10 to apply pressure. When it is necessary to perform a pressure test on the concrete test block 10, such as a compressive strength test, the PLC controller automated operation process is as follows: (1) Initial state: The outer fixed cover 5 is in the raised position, the circular carrier plate 31 is stationary, and the cold and heat source and humidifier are turned off; (2) Placement of test blocks: Place four concrete test blocks 10 (size 100mm×100mm×100mm) into the four internal temperature chambers 43 (test block placement area), start the linkage clamping mechanism, and control the cylinder 72 of the pressure equalization control module to clamp the concrete test blocks 10 synchronously. (3) Apply pressure: Start the hydraulic control module. The hydraulic control module controls the two oil cylinders 92 of the pressure unit to drive the two pressure plates 93 to move towards each other, applying pressure to the test block sandwiched in the middle. The pressure sensor monitors the pressure value in real time and feeds it back to the control unit. The control unit adjusts the pressure of the oil cylinder 92 according to the preset pressure loading rate (e.g., 0.5MPa / s) until the preset initial pressure value (e.g., 1MPa) is reached and kept stable. (4) Pressure test: After the environmental parameters stabilize, the control unit controls the hydraulic control module to continue to apply pressure according to the preset loading regime. The loading rate can be selected according to the type of test block (e.g., 0.3MPa / s-0.5MPa / s for ordinary concrete); the pressure sensor collects pressure data in real time, and all data is transmitted to the control unit in real time and recorded and stored. (5) Destruction judgment: When the concrete test block 10 is destroyed (the pressure value drops sharply, and the drop exceeds 10% of the current pressure value), the control unit immediately issues an instruction, the hydraulic control module stops pressurizing and controls the oil cylinder 92 to slowly depressurize to the initial pressure value; if the test block is not destroyed but reaches the preset maximum pressure value or maximum deformation, the control unit also controls the oil cylinder 92 to stop pressurizing and depressurize.
[0047] (6) Data recording: The control unit automatically records the maximum pressure value (compressive strength value) when the test block fails, the failure time, the pressure-deformation curve of the whole process and the corresponding environmental parameters, and generates a draft test report.
[0048] (7) Test completion: After the test block is completed, the control unit controls the oil cylinder 92 to completely depressurize, the control unit saves all test data and generates a complete test report, and at the same time issues a test completion prompt signal, waiting for the operator to take out the concrete test block 10.
[0049] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A concrete environment simulation test chamber, characterized in that, include: The main frame includes a temperature control cabinet and a device cabinet; The test block loading unit includes a platform, a linkage clamping mechanism, and a dynamic isolation cover. The platform includes a circular carrier plate and a partition assembly. The circular carrier plate is rotatably mounted inside the temperature control cabinet. The partition assembly is located on top of the circular carrier plate and divides it into multiple test block placement areas. The linkage clamping mechanism is located in the test block placement area and is used to clamp concrete test blocks. The dynamic isolation cover includes an inner cover, an outer cover, and a reset component. The inner cover is located outside the partition assembly and is fixed relative to the partition assembly. The sidewall of the inner cover has multiple spaced-apart inner windows that communicate with the test block placement areas. The outer cover is rotatably mounted outside the inner cover and has multiple spaced-apart outer windows on its sidewall. The reset component connects the inner cover and the outer cover and can drive the outer cover to rotate periodically relative to the inner cover, so as to periodically open and close the inner windows. An outer fixed cover is movably disposed inside the temperature control cabinet. The outer fixed cover has a closed cavity and can move within the temperature control cabinet to open and close the outer cover. A temperature and humidity control module is disposed inside the outer cover, and the temperature and humidity control module is used to control the temperature and humidity inside the cavity of the outer cover.
2. The concrete environment simulation test chamber according to claim 1, characterized in that, The concrete environment simulation test chamber also includes a drive unit and a control unit. The drive unit includes a rotating mechanism and a lifting mechanism. The rotating mechanism is located inside the device cabinet and is connected to the circular carrier plate and can drive the circular carrier plate to rotate. The lifting mechanism is located in the temperature control cabinet and is connected to the outer fixed cover and can drive the outer fixed cover to move along the height direction of the temperature control cabinet. The control unit is electrically connected to the drive unit, the test block loading unit, and the temperature and humidity control module, respectively, to receive status signals from each component and output control commands.
3. The concrete environment simulation test chamber according to claim 2, characterized in that, The outer cover includes multiple outer partitions, which are spaced apart on the inner wall of the outer cover. When the outer cover closes the outer cover body, the positions of the outer partitions and the partition assemblies correspond, the outer wall of the outer cover body is in sealed contact with the outer partitions, and the friction between the outer cover body and the outer partitions can drive the outer cover body to rotate relative to the inner cover body. The reset member is an elastic member. In its natural state, the inner window of the inner cover body overlaps with the outer window of the outer cover body, and the test block placement area is in an open state.
4. The concrete environment simulation test chamber according to claim 3, characterized in that, When the concrete environment simulation test chamber is in operation, the platform rotates and drives the inner cover to rotate synchronously. After the inner cover rotates relative to the outer cover by a preset angle, the inner window and the outer window are misaligned and close the test block placement area. At the same time, the outer cover stretches / compresses the elastic element. After the inner cover continues to rotate by a preset angle, the stretched / compressed elastic element causes the inner cover to rotate in the opposite direction due to the restoring force, so that the inner window and the outer window are reset to overlap and the test block placement area is opened.
5. The concrete environment simulation test chamber according to any one of claims 2-4, characterized in that, The lifting mechanism includes a guide rod, a screw, and a lifting motor. The guide rod and the screw are spaced apart in the temperature control cabinet. The outer side wall of the outer fixed cover is provided with a guide sleeve and an internal threaded sleeve. The guide sleeve is slidably connected to the guide rod, and the internal threaded sleeve is threadedly connected to the screw. The lifting motor is located on the top side of the temperature control cabinet and is drivenly connected to the screw.
6. The concrete environment simulation test chamber according to claim 5, characterized in that, The rotating mechanism includes a rotary motor, which is located inside the device cabinet. A fixed shaft extending into the device cabinet is provided on one side of the bottom of the circular carrier plate, and the fixed shaft is connected to the output end of the rotary motor.
7. The concrete environment simulation test chamber according to any one of claims 2-4 or 6, characterized in that, The linkage clamping mechanism includes a pressure equalization control module and multiple clamping components. The multiple clamping components are respectively disposed in multiple test block placement areas. The multiple clamping components are connected in series with each other and connected to the pressure equalization control module. The pressure equalization control module can control the clamping of the concrete test block by each clamping component synchronously and with the same pressure, and can automatically equalize the clamping force of each clamping component when the concrete test block expands and contracts with heat.
8. The concrete environment simulation test chamber according to claim 7, characterized in that, The clamping assembly includes a vertical plate, a cylinder, and a clamping plate. The vertical plates are arranged in pairs at intervals on the circular carrier plate. The cylinders are respectively located on the opposite sides of the vertical plates, and the telescopic ends of the cylinders pass through the vertical plates and are connected to the clamping plates. The cylinders in the multiple test block placement areas are connected in series through air pipes. The pressure equalization control module includes an air storage tank, a precision pressure reducing valve, and a pressure sensor. The air storage tank is connected to the cylinders connected in series via an air pipe, and the pressure sensor can monitor the pressure in the air pipe in real time. When the concrete test block expands and contracts due to heat, if the pressure in one cylinder increases, the excess gas flows to the cylinder with lower pressure through the series pipeline. The pressure sensor transmits the signal to the control unit, and the pressure reducing valve is used for fine-tuning to achieve automatic pressure equalization of each cylinder.
9. The concrete environment simulation test chamber according to any one of claims 2-4, 6, or 8, characterized in that, The temperature and humidity control module includes a cold source, a heat source, and a humidity control component. The cold source and the heat source are arranged diagonally inside the outer fixed cover and are respectively connected to the control unit. The humidity control component is disposed in the outer fixed cover and connected to the control unit for regulating the humidity inside the outer fixed cover. A pressure unit is also provided in the test block placement area. The pressure unit is connected to the control unit and can apply pressure to the concrete test block placed in the test block placement area.
10. The concrete environment simulation test chamber according to any one of claims 1-4, 6, or 8, characterized in that, The top side of the outer cover is provided with multiple arc-shaped limiting grooves, which are coaxially arranged with the outer cover. The top side of the inner cover is provided with multiple guide posts, which are respectively inserted into the arc-shaped limiting grooves at corresponding positions. The top of the guide post extends upward out of the outer cover and is equipped with an anti-detachment cap. When the circular carrier plate drives the inner cover to rotate and causes the inner window and the outer window to overlap or close, the guide post moves synchronously with the inner cover and abuts against the end of the arc-shaped limiting groove.