A concrete sulfate dry-wet cycle test device
Patent Information
- Application Number
- CN202522306120.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-31
AI Technical Summary
然而，在干湿循环过程中，水分蒸发、硫酸钠在试块上结晶并部分剥落、以及试块对硫酸根离子的化学吸附，均会导致溶液中的有效溶质持续损失，浓度不断下降
1. 本申请通过设置一级储水筒与二级储水筒，实现了“溶液再生”与“试验进程”的并行操作与无缝衔接。二级储水筒作为一个即用型溶液的缓冲容器，其内部始终储存着足量的、已配置合格的标准溶液。当试验箱需要进行浸泡时，系统可立即从二级储水筒中泵送溶液，保证了供给的及时性，实现了“零等待”的快速响应。整个过程中一级储水筒和二级储水筒之间完全独立，不存在相互影响。
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Figure CN224839824U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of concrete testing technology, specifically to a concrete sulfate wet-dry cycle test device. Background Technology
[0002] The concrete sulfate wet-dry cycle test is a key method for evaluating the durability of concrete in sulfate environments such as saline-alkali land and coastal areas. This test accelerates the erosion and damage process of concrete specimens by simulating the immersion and drying cycles in sulfate solution.
[0003] Existing testing apparatus typically includes a test chamber and one or more storage tanks. During the test, sodium sulfate solution is repeatedly pumped into the test chamber for immersion, then drained and heated to dry. However, during the wet-dry cycle, water evaporation, sodium sulfate crystallization and partial peeling off on the test block, and the chemical adsorption of sulfate ions by the test block all lead to a continuous loss of effective solute in the solution, resulting in a continuous decrease in concentration. Operators need to continuously measure (e.g., using a hydrometer) to sense concentration changes and add solute to compensate, but the compensation operation has a lag and needs to be completed quickly within two immersion cycles, requiring operators to constantly monitor the control panel. Utility Model Content
[0004] In view of the above problems, this application provides a concrete sulfate wet-dry cycle test device, which can easily maintain the stability of solution concentration, has self-cleaning ability, and can realize long-term continuous and stable operation of concrete sulfate wet-dry cycle test.
[0005] According to one aspect of the embodiments of this application, a concrete sulfate wet-dry cycle test apparatus is provided. The concrete sulfate wet-dry cycle test apparatus includes a test chamber, a water tank, and a PLC controller. The test chamber contains shelves for placing concrete test blocks and a drying and heating device. The water tank includes a primary storage tank and a secondary storage tank. The primary storage tank contains a concentration detection device for detecting solution concentration, a level gauge, and a stirring device. A loop pipe connects the test chamber and the primary storage tank. This loop pipe is equipped with a reflux pump to return the solution from the test chamber to the primary storage tank and a filter assembly to filter impurities from the solution. The secondary storage tank is connected to the inlet of the test chamber via an inlet pump, and the primary storage tank is connected to the secondary storage tank via a replenishment pump. The concentration detection device, inlet pump, reflux pump, and replenishment pump are all electrically connected to the PLC controller. The PLC controller is configured to calculate the required mass of solute and water to be added to the primary storage tank based on signals from the concentration detection device and the level gauge, and display this calculation through a display window.
[0006] In some embodiments, the concentration detection device is a linear density sensor.
[0007] In some embodiments, the stirring device includes a stirring shaft and a scraper disposed at the bottom of the stirring shaft, the scraper being in contact with the bottom wall of the primary water storage tank.
[0008] In some embodiments, the scraper is made of a flexible material.
[0009] In some embodiments, the drying and heating device inside the test chamber is a coil-type heating assembly, and the pipes of the heating assembly are led out from the test chamber and coiled around the outside of the primary water storage tank and the secondary water storage tank, respectively.
[0010] In some embodiments, the pipes coiled around the outside of the primary and secondary water storage tanks are spiral-shaped.
[0011] In some embodiments, the filtration assembly includes a plurality of tubular filters arranged in parallel, the lower ends of which extend into the primary water storage tank.
[0012] The beneficial effects of this application are: 1. This application achieves parallel operation and seamless integration of "solution regeneration" and "experimental process" by setting up a primary and secondary water storage tank. The secondary water storage tank, acting as a ready-to-use solution buffer container, always stores a sufficient quantity of prepared, qualified standard solution. When the test chamber needs to be immersed, the system can immediately pump solution from the secondary water storage tank, ensuring timely supply and achieving a rapid response with "zero waiting time." Throughout the entire process, the primary and secondary water storage tanks are completely independent and do not interfere with each other.
[0013] 2. In this application, the operator only needs to add solute according to the displayed values, and the equipment can run almost continuously. This solves the problem of existing equipment requiring long-term monitoring of the operating table due to frequent manual solution preparation and replacement, greatly improving experimental efficiency and reducing manual labor intensity, and is especially suitable for long-term durability tests that require hundreds of cycles.
[0014] 3. In this application, the residual heat of the heating coil in the test chamber is used to keep the water storage tank warm, preventing sodium sulfate from crystallizing due to low temperature during storage and circulation, thus eliminating the risk of pipeline blockage and ensuring the long-term stability and reliability of the entire circulation system.
[0015] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description
[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the device provided in the embodiments of this application; Figure 2 This is a schematic diagram of the overall structure of the device provided in an embodiment of this application from another perspective; Figure 3 This is a partial structural diagram provided for an embodiment of this application; Figure 4 This is a partial half-section structural diagram provided for an embodiment of this application.
[0017] The reference numerals in the detailed embodiments are as follows: The concrete sulfate wet-dry cycle test apparatus includes: 100, test chamber 110, shelf 111, water tank 120, primary water storage tank 121, concentration detection device 121a, level gauge 121b, stirring device 121c, replenishment pump 121d, secondary water storage tank 122, inlet pump 122a, PLC controller 130, loop pipeline 140, reflux pump 141, filter assembly 142, and coil heating assembly 150. Detailed Implementation
[0018] The embodiments of the technical solution of this application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and the foregoing description of the accompanying drawings are intended to cover non-exclusive inclusion.
[0019] For details, please refer to Figures 1 to 4 , Figure 1 This is a schematic diagram of the overall structure of the device provided in an embodiment of this application. Figure 2 This is a schematic diagram of the overall structure of the device provided in an embodiment of this application from another perspective. Figure 3 This is a partial structural diagram provided for an embodiment of this application. Figure 4This is a partial half-sectional structural diagram provided for an embodiment of this application. The concrete sulfate wet-dry cycle test device 100 includes a test chamber 110, a water tank 120, and a PLC controller 130. The test chamber 110 is the main testing site, and it is usually equipped with a flip-up cover for easy access to the test blocks. The test chamber 110 is equipped with shelves 111 for placing concrete test blocks and a drying and heating device. The shelves 111 and the drying and heating device are existing technologies and will not be described in detail here. The water tank 120 includes a primary water storage tank 121 and a secondary water storage tank 122. The primary water storage tank 121 is used to reconstitute the recovered solution to make its concentration meet the standard again. The secondary water storage tank 122 is used to collect the prepared sodium sulfate solution and is ready to pump it into the test chamber to soak the test blocks. The primary water storage tank 121 is equipped with a concentration detection device 121a, a level gauge 121b, and a stirring device 121c for detecting solution concentration. The level gauge 121b measures the total volume of the solution in the primary water storage tank 121 to obtain its total weight. The concentration detection device 121a can be a linear density sensor used to detect solution concentration. A loop pipe 140 connects the test chamber 110 and the primary water storage tank 121. The loop pipe 140 is equipped with a reflux pump 141 for pumping the solution in the test chamber 110 back to the primary water storage tank 121, and a filter assembly 142 for filtering impurities in the solution. After soaking, the sodium sulfate solution inside the test chamber enters the filter assembly 142 through the loop pipe 140 to filter impurities, mainly small particles from detached test blocks. After filtration, the solution enters the primary water storage tank 121. The secondary water storage tank 122 is connected to the inlet of the test chamber 110 via the inlet pump 122a. The primary water storage tank 121 is connected to the secondary water storage tank 122 via the replenishment pump 121d. After the solution is prepared in the primary water storage tank 121, it will enter the secondary water storage tank 122 via the replenishment pump 121d. Then, in the next soaking cycle, it will enter the test chamber via the inlet pump 122a. Concentration detection device 121a, inlet pump 122a, reflux pump 141, and replenishment pump 121d are all electrically connected to PLC controller 130. PLC controller 130 is configured to calculate the mass of solute and water to be added to primary water storage tank 121 based on the signals fed back by concentration detection device 121a and level gauge 121b, and display the result through a display window. It is understood that an alarm device linked to PLC controller 130 can also be set here. When PLC controller 130 calculates the mass of solute and water to be added to primary water storage tank 121, the alarm device is activated to remind the operator to add solute or solvent to primary water storage tank 121.
[0020] The working process of this application is as follows: In the initial preparation stage, the operator prepares a standard concentration sodium sulfate solution in the primary storage tank 121 and transports it to the secondary storage tank 122 for temporary storage via the replenishment pump 121d. At the same time, the target concentration and circulation parameters are set in the PLC. Subsequently, the automatic operation cycle begins. First, the PLC controls the inlet pump 122a to pump the standard solution in the secondary storage tank 122 into the test chamber 110 until the concrete specimen is completely submerged, and the soaking timer begins. After soaking, the PLC starts the return pump 141 to extract the solution in the chamber through the bottom return port. At this time, the solution enters the parallel cylindrical filter to filter out concrete debris and then flows back to the primary storage tank 121. Simultaneously, the drying and heating device in the test chamber 110 is turned on to dry the specimen. When the solution has completely returned, the PLC synchronously reads the real-time concentration value of the concentration detection device 121a and the total volume data measured by the level gauge 121b. The built-in program accurately calculates the difference between the current total solute and the target value and displays the mass of solute to be replenished in real time on the operation interface. After the operator manually adds the appropriate mass of sodium sulfate solid according to the displayed value, the PLC starts the agitator 121c with a scraper to mix the solution. The scraper continuously scrapes up the solute deposited at the bottom of the cylinder during rotation to ensure a uniform solution. Subsequently, the PLC controls the replenishment pump 121d to transport the standard concentration solution from the primary storage tank 121 to the secondary storage tank 122 for later use, thus completing one wet-dry cycle. The device automatically repeats the above process to achieve continuous testing. During this process, the residual heat generated by the heating coil extension of the test chamber 110 continuously insulates the two storage tanks, effectively preventing sodium sulfate crystallization and ensuring long-term stable operation of the system.
[0021] In some embodiments, the stirring device 121c includes a stirring shaft and a scraper disposed at the bottom of the stirring shaft. The scraper contacts the bottom wall of the primary water storage tank 121 and is made of a flexible material. In this embodiment, by setting the scraper to forcibly scrape up and stir the solid solute deposited at the bottom of the tank, it is made to dissolve the solid solute quickly in the solution, avoiding the problem of sodium sulfate solid depositing at the bottom and not dissolving in time due to adding too much sodium sulfate solid at once.
[0022] In some embodiments, the drying and heating device inside the test chamber 110 is a coil-type heating assembly 150. The pipes of this heating assembly extend from the test chamber 110 and are coiled around the outside of the primary water storage tank 121 and the secondary water storage tank 122, respectively. The pipes coiled around the outside of the primary and secondary water storage tanks 121 and 122 are spiral-shaped. In this embodiment, through the above-mentioned arrangement, the waste heat from the drying stage can be used to keep the liquid storage unit warm without additional heating power consumption. This fundamentally prevents sodium sulfate from crystallizing and precipitating due to excessively low temperatures during storage, ensuring the smooth flow of the solution circuit and improving the system's adaptability to low-temperature environments.
[0023] In some embodiments, the filtration assembly 142 includes a plurality of cylindrical filters arranged in parallel, the lower ends of which extend into the primary water storage tank 121. In this embodiment, the arrangement of multiple cylindrical filters accelerates the filtration process. Furthermore, during filter maintenance or replacement, the branch containing the filter can be shut off, while other filters maintain normal system operation without affecting the overall operation of the equipment.
[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although the foregoing embodiments have provided a detailed description of this application, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A concrete sulfate wet-dry cycle test apparatus, comprising a test chamber, a water tank, and a PLC controller, wherein the test chamber is equipped with shelves for placing concrete test blocks and a drying and heating device, characterized in that: The water tank includes a primary water storage tank and a secondary water storage tank. The primary water storage tank is equipped with a concentration detection device for detecting the solution concentration, a level gauge, and a stirring device. A loop pipe connects the test chamber and the primary water storage tank. The loop pipe is equipped with a reflux pump for pumping the solution in the test chamber back to the primary water storage tank and a filter assembly for filtering impurities in the solution. The secondary water storage tank is connected to the inlet of the test chamber via an inlet pump, and the primary water storage tank is connected to the secondary water storage tank via a replenishment pump. The concentration detection device, inlet pump, reflux pump, and replenishment pump are all electrically connected to the PLC controller. The PLC controller is configured to calculate the mass of solute and water to be added to the primary water storage tank based on the signals fed back from the concentration detection device and the level gauge, and display the result through a display window.
2. The concrete sulfate wet-dry cycle test apparatus according to claim 1, characterized in that, The concentration detection device is a linear density sensor.
3. The concrete sulfate wet-dry cycle test apparatus according to claim 1, characterized in that, The stirring device includes a stirring shaft and a scraper disposed at the bottom of the stirring shaft, the scraper being in contact with the bottom wall of the primary water storage tank.
4. The concrete sulfate wet-dry cycle test apparatus according to claim 3, characterized in that, The scraper is made of a flexible material.
5. The concrete sulfate wet-dry cycle test apparatus according to claim 1, characterized in that, The drying and heating device inside the test chamber is a coil-type heating assembly. The pipes of the heating assembly are led out from the test chamber and coiled around the outside of the primary and secondary water storage tanks, respectively.
6. The concrete sulfate wet-dry cycle test apparatus according to claim 5, characterized in that, The pipes coiled around the outside of the primary and secondary water storage tanks are in a spiral shape.
7. The concrete sulfate wet-dry cycle test apparatus according to claim 1, characterized in that, The filtration assembly includes multiple cylindrical filters arranged in parallel, with the lower ends of each cylindrical filter extending into the primary water storage tank.