Liquid level retaining device for concrete single-side freeze thawing test
By designing a liquid level holding device that utilizes atmospheric pressure and communicator principles, the problems of insufficient liquid level stability and complex operation of existing devices are solved, and the test accuracy and efficiency are improved, ensuring the accuracy and reliability of the test results.
Patent Information
- Application Number
- CN202421282624.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-06-06
AI Technical Summary
The existing concrete single-sided freeze-thaw test liquid level holding device has problems such as insufficient liquid level stability, complex operation, low degree of automation, durability, and poor sealing, which affects the accuracy and efficiency of the test results.
A liquid level holding device including a liquid storage container and a base liquid storage container is designed. By using the atmospheric pressure and the principle of communicator, the liquid level height is always maintained at the set value through automatic adjustment of the liquid feeding port, the liquid outlet port and the liquid inlet port.
It improves the test accuracy and efficiency, simplifies operation, reduces artificial errors, enhances the durability and sealing of the device, and improves the accuracy and reliability of the test results.
Smart Images
Figure CN222926648U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of concrete test, and particularly relates to a liquid level maintaining device for a single-sided freeze-thaw test of concrete. Background Technique
[0002] In winter in northern China, deicing salts are often sprayed to remove ice and snow. The deicing salts and cold weather will cause salt freeze damage to structures such as cement concrete pavements, bridge surfaces, guardrails, and curb stones. The "Standard Test Method for Long-Term Performance and Durability of Ordinary Concrete" (GB / T 50082-2009) recommends the single-sided freeze-thaw method (or salt freeze method) of concrete to evaluate the salt freeze resistance of concrete structures.
[0003] During the single-sided freeze-thaw test process, the test surface of the specimen needs to be immersed in the test liquid, and the liquid level height needs to be maintained at 10±1 mm. Due to factors such as the water absorption of the specimen and evaporation during the test, the liquid level height is affected and cannot be stably maintained within this range. The liquid level adjustment device proposed in the "Standard Test Method for Long-Term Performance and Durability of Ordinary Concrete" (GB / T 50082-2009) consists of a water suction pipe and a liquid level automatic positioning control device that keeps the distance between the liquid level and the bottom of the specimen box within a certain range. However, this device has the following problems: (1) Insufficient liquid level stability: The existing device cannot effectively cope with the liquid level height changes caused by the water absorption of the specimen and the evaporation of the liquid during the test, which will cause the liquid level height to fluctuate beyond the allowable range during the test, thereby affecting the accuracy of the test results. (2) Complicated operation: The device design is too complicated, so that the liquid level height needs to be frequently adjusted during use, which not only increases the operation difficulty but also may introduce human errors. (3) The ordinary dropper has a low degree of automation and lacks the functions of automatically monitoring and adjusting the liquid level height. It needs to be manually checked and adjusted regularly, which not only reduces the test efficiency but also increases the labor cost. (4) Poor durability and sealing performance: The material and structure design of the device are not durable enough, and it is easy to leak or be damaged during the test, resulting in test failure or inaccurate results.
[0004] Therefore, a device that can accurately adjust the liquid level height, is simple to operate, has high sealing and durability is needed to keep the test liquid level within a certain range, increase the stability of the single-sided freeze-thaw test, and improve the accuracy of evaluating the salt freeze resistance of concrete specimens. Content of the Utility Model
[0005] The purpose of the utility model is to provide a liquid level maintaining device for a single-sided freeze-thaw test of concrete, which effectively solves the problems such as large operation difficulty of the current liquid level adjustment device.
[0006] To solve the above technical problems, the technical solution adopted by the utility model is:
[0007] A liquid level maintaining device for one-sided freeze-thaw test of concrete, comprising a liquid storage container and a base liquid storage container. The bottom of the liquid storage container is connected to the top of the base liquid storage container. The top of the liquid storage container is provided with a liquid filling port and a top cover for sealing the liquid filling port. The bottom of the liquid storage container is provided with a liquid outlet, and a liquid inlet is provided at a position corresponding to the liquid outlet on the top of the base liquid storage container.
[0008] A liquid supply port is provided on the side wall of the base liquid storage container, and the distance from the liquid supply port to the bottom wall of the base liquid storage container is 1 cm.
[0009] Further, the inner diameter of the base liquid storage container first gradually expands from top to bottom, and then extends downward to the bottom of the base liquid storage container with the maximum inner diameter.
[0010] Further, the upper part of the cylinder body of the liquid storage container is cylindrical, and the inner diameter of the lower part of the cylinder body first gradually decreases from top to bottom, and then extends downward to the bottom of the liquid storage container with the minimum inner diameter.
[0011] Further, there are multiple liquid supply ports, and the multiple liquid supply ports are evenly arranged around the side wall of the base liquid storage container.
[0012] Further, a groove adapted to the bottom of the liquid storage container is provided on the top of the base liquid storage container, and the liquid inlet is provided at the bottom of the groove.
[0013] Further, a handle is provided on the top cover.
[0014] Compared with the prior art, the beneficial technical effects of the present utility model are:
[0015] (1) Improving test accuracy: By precisely controlling the height of the liquid supply port at a distance of 1 cm from the bottom wall of the base liquid storage container, when the liquid level in the specimen box is lower than this set value, the liquid supply port, the liquid outlet and the liquid inlet are all automatically opened to ensure that the liquid level always remains at the set height. By precisely controlling the liquid level height during the test process, it is beneficial to reduce the test error caused by liquid level fluctuations, thereby improving the data accuracy and reliability of the one-sided freeze-thaw test of concrete.
[0016] (2) Simplifying operation and control: Utilizing the principle of atmospheric pressure and communicating vessels, the present utility model can automatically adjust the liquid level height, with simple operation, greatly simplifying the test operation process, reducing the technical requirements for operators, and improving the stability and safety of the test process.
[0017] (3) Improving test efficiency: The present utility model can quickly reach the preset test conditions, and at the same time, by optimizing the test process, unnecessary test steps are reduced, thereby improving the test efficiency.
[0018] (4) Improved applicability: The utility model is applicable to concrete specimens of different specifications and types, with strong versatility and applicability. In addition, the structure of the utility model is compact and has a small area, which is convenient for use in a single-sided freeze-thaw tester. Description of the Drawings
[0019] Figure 1 is the front view of the utility model.
[0020] Figure 2 is the top view of the utility model.
[0021] Figure 3 is the working state diagram of the utility model. Detailed Implementation Manner
[0022] A liquid level maintaining device for a single-sided freeze-thaw test of concrete, as Figure 1 shown, includes a liquid storage container 1 and a base liquid storage container 2. The liquid storage container 1 is approximately in the shape of an inverted wide-mouth bottle, and the base liquid storage container 2 is approximately in the shape of a frustum of a cone. The upper part of the cylinder body of the liquid storage container 1 is cylindrical, and the inner diameter of the lower part of the cylinder body gradually decreases from top to bottom first, and then extends downward to the bottom of the liquid storage container 1 with the minimum inner diameter. The inner diameter of the base liquid storage container 2 gradually increases from top to bottom first, and then extends downward to the bottom of the base liquid storage container 2 with the maximum inner diameter. By designing the side wall of the base liquid storage container 2 as an inclined surface, it helps the uniform distribution and flow of the liquid in the base liquid storage container 2.
[0023] The top of the liquid storage container 1 is provided with a liquid filling port 3 and a top cover 4 for sealing the liquid filling port 3. For the convenience of operation, in this embodiment, a handle 5 is provided on the top cover 4. The bottom of the liquid storage container 1 is provided with a liquid outlet. The top of the base liquid storage container 2 is provided with a groove 6 adapted to the bottom of the liquid storage container 1, and the bottom of the liquid storage container 1 is placed in the groove 6 and connected to the base liquid storage container 2. At a position corresponding to the liquid outlet at the bottom of the groove 6, a liquid inlet 7 is provided.
[0024] A liquid supply port 8 is provided on the side wall of the base liquid storage container 2, and the distance between the liquid supply port 8 and the bottom wall of the base liquid storage container 2 is 1 cm. When the liquid level in the specimen box 9 of the single-sided freeze-thaw tester is lower than 1 cm, the solution in the base liquid storage container 2 flows out from the liquid supply port 8, so that the liquid level in the specimen box 9 of the single-sided freeze-thaw tester is always maintained at 1 cm. In this embodiment, as Figure 2 shown, there are multiple liquid supply ports 8, and the multiple liquid supply ports 8 are uniformly arranged around the side wall of the base liquid storage container 2.
[0025] The working principle of the present utility model is based on the atmospheric pressure and the principle of communicating vessels. The liquid level in the specimen box 9 of the single-sided freeze-thaw tester is adjusted in real time through the base liquid storage container 2. When the liquid level in the specimen box 9 of the single-sided freeze-thaw tester is lower than 1 cm, the liquid will flow out through the liquid supply port 8 of the present utility model to ensure that the liquid level is always maintained at 1 cm.
[0026] The working process of the present utility model is as follows: When the single-sided freeze-thaw test starts, just open the top cover 4 of the liquid storage container 1, add the prepared test solution, cover and seal the top cover 4 of the liquid storage container 1, and place the present utility model in the specimen box 9 of the single-sided freeze-thaw tester filled with a certain amount of test solution. As Figure 3 shown, the present utility model can stand steadily in the specimen box 9. When the liquid level in the specimen box 9 is lower than 1 cm, the liquid in the base liquid storage container 2 will flow out through the liquid supply port 8 until the liquid level in the specimen box 9 reaches 1 cm and the liquid outflow stops. During the test, when the liquid level in the specimen box 9 drops due to factors such as the specimen absorbing liquid and evaporation, the liquid in the base liquid storage container 2 will flow out from the liquid supply port 8 in time, so that during the test, the liquid level is always maintained at a height of 1 cm.
[0027] The present utility model has the following advantages: (1) Improving test accuracy: By precisely controlling the height of the liquid supply port 8 at a distance of 1 cm from the bottom wall of the base liquid storage container 2, when the liquid level in the specimen box 9 is lower than this set value, the liquid supply port 8, the liquid outlet and the liquid inlet 7 will all open automatically to ensure that the liquid level is always maintained at the set height. By precisely controlling the liquid level height during the test process, it is beneficial to effectively reduce the test error caused by liquid level fluctuations, thereby improving the data accuracy and reliability of the concrete single-sided freeze-thaw test. (2) Simplifying operation and control: The present utility model utilizes the atmospheric pressure and the principle of communicating vessels, can automatically adjust the liquid level height, has simple operation, greatly simplifies the test operation process, reduces the technical requirements for operators, and improves the stability and safety of the test process. (3) Improving test efficiency: The present utility model can quickly reach the preset test conditions, and at the same time, by optimizing the test process, unnecessary test steps are reduced, and the test efficiency is improved. (4) Improving applicability: The present utility model is applicable to concrete specimens of different specifications and types, and has strong versatility and applicability. In addition, the present utility model has a compact structure and a small area, which is convenient for use in a single-sided freeze-thaw tester.
[0028] Of course, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essence of the present utility model should also belong to the protection scope of the present utility model.
Claims
1. A liquid level maintaining device for a single-sided freeze-thaw test of concrete, characterized in that: The invention comprises a liquid storage container and a base liquid storage container, wherein the bottom of the liquid storage container is connected to the top of the base liquid storage container, the top of the liquid storage container is provided with a liquid adding port and a top cover for sealing the liquid adding port, the bottom of the liquid storage container is provided with a liquid outlet, and the top of the base liquid storage container is provided with a liquid inlet at a position corresponding to the liquid outlet; A liquid feeding port is arranged on the side wall of the base liquid container, and the distance between the liquid feeding port and the bottom wall of the base liquid container is 1 cm.
2. The liquid level maintaining device for concrete single-sided freeze-thaw test according to claim 1, characterized in that: The inner diameter of the base liquid container first gradually expands from top to bottom, and then extends downward to the bottom of the base liquid container with the maximum inner diameter.
3. The liquid level maintaining device for concrete single-sided freeze-thaw test according to claim 2, characterized in that: The upper part of the cylinder of the liquid storage container is cylindrical, and the inner diameter of the lower part of the cylinder gradually decreases from top to bottom, and then extends downward to the bottom of the liquid storage container with the minimum inner diameter.
4. The liquid level maintaining device for concrete single-sided freeze-thaw test according to claim 3, characterized in that: There are multiple liquid supply ports, and the multiple liquid supply ports are evenly arranged around the side wall of the base liquid container.
5. The liquid level maintaining device for concrete single-sided freeze-thaw test according to claim 4, characterized in that: The top of the base liquid container is provided with a groove matched with the bottom of the liquid storage container, and the liquid inlet is arranged at the bottom of the groove.
6. The liquid level maintaining device for concrete single-sided freeze-thaw test according to claim 5, characterized in that: The top cover is provided with a handle.