Testing device for simulating erosion environment of alternate change of concentration of water body corrosion medium
By designing a test device that simulates the alternating changes in the concentration of corrosive media in water bodies, the problem of difficult to simulate the concentration changes in corrosive media in water bodies in the river and sea intersection area is solved, and the precise study of the durability of concrete structures in the river and sea intersection area is achieved, reducing the test workload and chemical consumption.
Patent Information
- Application Number
- CN202422131212.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The existing technology cannot effectively simulate the alternating changes in the concentration of corrosive media in the river and sea intersection area, resulting in the inability of research results in the seawater environment to be directly applied to the design and operation and maintenance of infrastructure durability in the river and sea intersection area.
A test device that simulates the alternating changes in the concentration of corrosive media in water bodies is designed, including water circulation pipelines, solution tanks, testing mechanisms and pump bodies. By controlling the concentration of corrosion solution, it simulates the erosion environment of the river and sea intersection area.
It provides more accurate experimental conditions to help study the durability of concrete structures in the river and sea junction area, provides a more accurate simulation environment for the durability research of the river and sea junction area, and reduces the test workload and chemical consumption.
Smart Images
Figure CN223244309U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of concrete testing, in particular to a testing device for simulating an erosion environment in which the concentration of a water corrosive medium changes alternately. Background Art
[0002] Infrastructure in coastal areas operates in harsh environments. Under the influence of seawater, corrosive media such as chlorides and sulfates can cause premature failure of reinforced concrete structures. Extensive research has been conducted on the corrosion damage and durability of concrete structures in seawater environments, yielding substantial results.
[0003] However, as research continues to deepen, relevant researchers have discovered that in some river-sea confluence areas, the concentrations of corrosive media such as chloride ions and sulfate ions in the water body periodically change due to the influence of seasonal rainfall and seawater backflow. The concentration gradient is the main driving force for the transmission of corrosive ions into the interior of the concrete. However, since the concentration of corrosive media in the water body of the river-sea confluence area is significantly different from that of the relatively constant seawater, and the flow rate of the water body is also different from that of seawater, it directly affects the diffusion process of the ions. Therefore, the research results of relevant durability design and anti-corrosion technology in the seawater environment cannot be directly used for the durability design and subsequent operation and maintenance of infrastructure in the river-sea confluence area, nor are they suitable for the concentration of corrosive media in the water body of the river-sea confluence area and the alternating environmental characteristics. Utility Model Content
[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a test device for simulating an erosion environment in which the concentration of a water corrosive medium changes alternately. The test device can provide test conditions for conducting durability research on concrete structures in river-sea confluence areas, which is of great significance for further supplementing and enriching the durability research on concrete structures in river-sea confluence areas.
[0005] According to an embodiment of the utility model, a test device for simulating an erosion environment in which the concentration of a corrosive medium in water alternately changes includes a water circulation pipeline; a solution tank, which is arranged on the water circulation pipeline and is used to adjust the concentration of the corrosive medium in the solution; a testing mechanism, which is arranged on the water circulation pipeline and is used to simulate the water erosion environment of concrete; and a pump body, which is arranged on the water circulation pipeline and is used to drive liquid to flow in the water circulation pipeline.
[0006] The test device for simulating an erosion environment in which the concentration of a corrosive medium in a water body changes alternately according to an embodiment of the utility model has at least the following beneficial effects: a corrosive solution is added to a solution tank to simulate seawater, a concrete specimen is placed in a test mechanism, and after reaching a specified erosion age, the concentration of the corrosive medium in the corrosive solution is regulated to reproduce the effects of seasonal rainfall and seawater backflow, simulating an erosion environment in which the concentration of the corrosive medium in a water body changes alternately, and providing more accurate test conditions for conducting durability research on concrete structures in river-sea confluence areas.
[0007] According to some embodiments of the present invention, the water circulation pipeline includes a first pipe section, a second pipe section and a third pipe section. The first pipe section, the solution tank, the second pipe section, the testing mechanism and the third pipe section are arranged in sequence, and the third pipe section is connected to the first pipe section.
[0008] According to some embodiments of the present utility model, the testing mechanism includes: a testing assembly, the input end of the testing assembly is connected to the second pipe segment, the output end of the testing assembly is connected to the third pipe segment, and the testing assembly is used to limit the position of the concrete specimen; a first water stop valve, the first water stop valve is arranged at the output end of the second pipe segment, and the first water stop valve is located between the second pipe segment and the third pipe segment; a second water stop valve, the second water stop valve is arranged at the output end of the testing assembly, and the second water stop valve is located between the test assembly and the third pipe segment.
[0009] According to some embodiments of the present invention, the test assembly includes: a sleeve, one end of the sleeve is sleeved on the second pipe segment, and the other end is sleeved on the third pipe segment, the inner diameter of the sleeve is the same as the outer diameter of the second pipe segment, and the inner diameter of the sleeve is the same as the outer diameter of the third pipe segment, and the sleeve is used to fix the concrete specimen; a locking piece, the locking piece is arranged on the sleeve, and the locking piece is used to fix the sleeve on the second pipe segment and the third pipe segment.
[0010] According to some embodiments of the present invention, the sleeve includes an upper shell and a lower shell, the upper shell and the lower shell are detachably connected, and the locking piece is sleeved on the outer walls of the upper shell and the lower shell.
[0011] According to some embodiments of the present invention, two slots are provided on the inner wall of the sleeve along the axial direction, the opening ends of the two slots are arranged opposite to each other, both slots correspond to the thickness of the concrete specimen, and the concrete specimen is inserted into the slots along the axial direction of the sleeve.
[0012] According to some embodiments of the present invention, the wall surface of the solution tank is transparent.
[0013] According to some embodiments of the present invention, an electromagnetic flowmeter is provided on the second pipe section, and the electromagnetic flowmeter is used to record the flow rate of the liquid in the second pipe section.
[0014] According to some embodiments of the present invention, the pump body is a variable frequency water pump, which is used to achieve precise adjustment of water flow, water pressure, and water flow rate.
[0015] According to some embodiments of the present invention, the water circulation pipe is made of PVC.
[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0018] Figure 1 This is a schematic structural diagram of a test device for simulating an erosion environment in which the concentration of a water corrosive medium changes alternately according to an embodiment of the present invention;
[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the test organization;
[0020] Figure 3 for Figure 2 Side view of the .
[0021] Reference numerals:
[0022] Water circulation pipeline 100, first pipe section 110, second pipe section 120, electromagnetic flow meter 121, third pipe section 130;
[0023] Solution tank 200;
[0024] Testing mechanism 300, testing assembly 310, sleeve 311, upper shell 3111, lower shell 3112, slot 3113, locking member 312, first water stop valve 320, second water stop valve 330;
[0025] Pump body 400;
[0026] Concrete specimen 10. DETAILED DESCRIPTION
[0027] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.
[0028] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.
[0029] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The first or second occurrence of a description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.
[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0031] refer to Figures 1 to 3 The present invention describes a test device for simulating an erosion environment in which the concentration of a corrosive medium in water changes alternately.
[0032] like Figures 1 to 3 As shown, the test device for simulating an erosion environment in which the concentration of a corrosive medium in water alternately changes includes a water circulation pipeline 100; a solution tank 200, which is disposed on the water circulation pipeline 100 and is used to adjust the concentration of the corrosive medium in the solution; a testing mechanism 300, which is disposed on the water circulation pipeline 100 and is used to simulate a water erosion environment for concrete; and a pump body 400, which is disposed on the water circulation pipeline 100 and is used to drive liquid to flow in the water circulation pipeline 100.
[0033] like Figure 1 As shown, the solution tank 200, the test mechanism 300 and the pump body 400 are arranged in sequence clockwise on the water circulation pipe 100. A corrosive solution is added to the solution tank 200 to simulate seawater, and the concrete specimen 10 is placed in the test mechanism 300. After reaching the specified corrosion age, the concentration of the corrosive medium in the corrosive solution is regulated to reproduce the effects of seasonal rainfall and seawater backflow, simulating the corrosion environment with alternating changes in the concentration of the water corrosive medium, providing more accurate test conditions for conducting durability research on concrete structures in river-sea confluence areas.
[0034] In some specific embodiments of the present invention, the water circulation pipe 100 is made of PVC.
[0035] In some specific embodiments of the present invention, a scale is provided on the wall of the solution tank 200. Specifically, the solution tank 200 is a transparent PVC plastic solution tank 200 with a raised water level scale. The PVC plastic can effectively prevent corrosion by corrosive media such as chloride ions and sulfate ions in the corrosive solution. The transparent material allows for observation of the amount of solution in the solution tank 200. The scale provided on the wall of the solution tank 200 can accurately control the amount of corrosive medium solution in the solution tank 200, and the solution concentration can be changed in real time by adding purified water or the amount of corrosive medium salt.
[0036] Specifically, taking a 3% mass fraction NaCl corrosive solution as an example, the initial solution volume is controlled to 100L by the scale of solution tank 200. The initial corrosive medium concentration of concrete specimen 10 is 3% NaCl, which is similar to the salinity of seawater. After reaching the specified corrosion age, the amount of pure water required is quantitatively calculated based on research data on corrosive medium concentrations in actual environments. By adding a certain volume of pure water, the concentration of the corrosive medium in the water body is reduced to simulate the influx of fresh water during the rainy season. Conversely, by calculating the required chemically pure amount of corrosive medium to be added, chemically pure NaCl or other corrosive medium is added to increase the concentration to simulate the concentration of water bodies during the dry season. This achieves the regulation of the corrosive medium concentration in the corrosive solution, eliminating the need to prepare a large amount of solution and drain the entire device, significantly reducing the experimental workload and saving a large amount of chemicals.
[0037] In some specific embodiments of the present invention, the water circulation pipeline 100 includes a first pipe section 110, a second pipe section 120 and a third pipe section 130. The first pipe section 110, the solution tank 200, the second pipe section 120, the testing mechanism 300 and the third pipe section 130 are arranged in sequence, and the third pipe section 130 is connected to the first pipe section 110. Figure 1 As shown, the first pipe section 110 is used to connect the water pump and the solution tank 200, the second pipe section 120 is used to connect the solution tank 200 and the testing mechanism 300, and the third pipe section 130 is used to connect the testing mechanism 300 and the water pump, thereby forming a water circulation channel.
[0038] In some specific embodiments of the present invention, the testing mechanism 300 includes: a testing component 310, the input end of the testing component 310 is connected to the second pipe segment 120, the output end of the testing component 310 is connected to the third pipe segment 130, and the testing component 310 is used to limit the position of the concrete specimen 10; a first water stop valve 320, the first water stop valve 320 is arranged at the output end of the second pipe segment 120, and the first water stop valve 320 is located between the second pipe segment 120 and the third pipe segment 130; a second water stop valve 330, the second water stop valve 330 is arranged at the output end of the testing component 310, and the second water stop valve 330 is located between the testing component 310 and the third pipe segment 130.
[0039] like Figure 2 As shown, the right end of the test assembly 310 is the input end, which is connected to the output end of the second pipe segment 120. The second pipe segment 120 is provided with a first water stop valve 320. The left end of the test assembly 310 is the output end, which is connected to the input end of the third pipe segment 130. The third pipe segment 130 is provided with a second water stop valve 330. Therefore, there is no need to empty the corrosive solution of the entire device. It is only necessary to close the first water stop valve 320 and the second water stop valve 330 to regularly take out the concrete specimen 10 in the test mechanism 300 for testing, thereby effectively reducing the difficulty of sampling and saving chemicals.
[0040] In some specific embodiments of the present invention, the test assembly 310 includes: a sleeve 311, one end of the sleeve 311 is sleeved on the second pipe section 120, and the other end is sleeved on the third pipe section 130, the inner diameter of the sleeve 311 is the same as the outer diameter of the second pipe section 120, and the inner diameter of the sleeve 311 is the same as the outer diameter of the third pipe section 130, and the sleeve 311 is used to fix the concrete specimen 10; a locking member 312, the locking member 312 is set on the sleeve 311, and the locking member 312 is used to fix the sleeve 311 on the second pipe section 120 and the third pipe section 130.
[0041] In some specific embodiments of the present invention, the sleeve 311 includes an upper shell 3111 and a lower shell 3112 , the upper shell 3111 and the lower shell 3112 are detachably connected, and the locking member 312 is sleeved on the outer walls of the upper shell 3111 and the lower shell 3112 .
[0042] like Figure 2 As shown, the right end of the sleeve 311 is sleeved on the output end of the second pipe segment 120, and the left end of the sleeve 311 is sleeved on the input end of the third pipe segment 130. Specifically, the sleeve 311 is divided into an upper shell 3111 and a lower shell 3112, wherein the upper shell 3111 is detachably arranged on the lower shell 3112, and the upper shell 3111 and the lower shell 3112 are clamped on the outer walls of the second pipe segment 120 and the third pipe segment 130. In this specific embodiment, the locking member 312 is a hoop, which is sleeved on the outer ends of the upper shell 3111 and the lower shell 3112 to lock the two on the second pipe segment 120 and the third pipe segment 130.
[0043] In some specific embodiments of the present invention, two slots 3113 are opened in the axial direction on the inner wall of the sleeve 311, and the open ends of the two slots 3113 are arranged opposite to each other. The two slots 3113 correspond to the thickness of the concrete specimen 10, and the concrete specimen 10 is inserted into the slots 3113 along the axial direction of the sleeve 311.
[0044] like Figure 3As shown, to facilitate specimen placement, retrieval, and securement, the inner wall of the upper shell 3111 is provided with two slots 3113 along the front-to-back direction. The left and right ends of the concrete specimen 10 are inserted into the two slots 3113, respectively. This not only ensures the placement of the concrete specimen 10 within the sleeve 311, but also prevents high-speed water flow from causing the specimen to shift. It should be noted that multiple concrete specimens 10 can be placed along the extension direction of the slots 3113, and the multiple concrete specimens 10 can be arranged sequentially along the front-to-back direction, thereby increasing the reliability of the test.
[0045] In some specific embodiments of the present invention, an electromagnetic flowmeter 121 is provided on the second pipe section 120 , and the electromagnetic flowmeter 121 is used to record the flow rate of the liquid in the second pipe section 120 .
[0046] In some specific embodiments of the present invention, the pump body 400 is a variable frequency water pump, which can control the water pump speed and power according to actual needs, to achieve precise adjustment of water flow, water pressure, and water flow rate, thereby simulating experiments on different typical river-sea confluence water environments.
[0047] In some specific embodiments of the present invention, the initial solution volume and concentration of the solution tank 200 are controlled to be close to the salinity of seawater. After reaching the specified corrosion age, the amount of pure water required to be added is quantitatively calculated based on the survey data of the concentration of the corrosive medium in the actual environment to reduce the concentration of the corrosive medium in the water body, simulating the influx of fresh water in the rainy season, or the required amount of chemical purity is calculated, and chemical purity of corrosive media such as NaCl is added to increase the concentration to simulate the concentration of water in the dry season. By regulating the concentration of the corrosive medium in the corrosive solution, the alternating change of the concentration of the corrosive medium in the water body is simulated, and the first water stop valve 320 and the second water stop valve 330 are closed at the corresponding age to regularly remove the concrete specimen 10 in the test mechanism 300 for testing, so as to help researchers conduct durability research on concrete structures under the influence of the river-sea confluence environment where the concentration of the corrosive medium alternates.
[0048] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.
Claims
1. A test device for simulating an erosive environment in which the concentration of a water corrosive medium changes alternately, characterized in that: include: Water circulation pipeline (100); A solution tank (200), the solution tank (200) being arranged on the water circulation pipeline (100), and the solution tank (200) being used to adjust the concentration of the corrosive medium in the solution; A testing mechanism (300), the testing mechanism (300) being arranged on the water circulation pipeline (100), and the testing mechanism (300) being used to simulate a water erosion environment of concrete; A pump body (400) is provided on the water circulation pipeline (100), and the pump body (400) is used to drive liquid to flow in the water circulation pipeline (100).
2. The test device for simulating an erosion environment in which the concentration of a water corrosive medium changes alternately according to claim 1, characterized in that: The water circulation pipeline (100) comprises a first pipe section (110), a second pipe section (120) and a third pipe section (130); the first pipe section (110), the solution tank (200), the second pipe section (120), the testing mechanism (300) and the third pipe section (130) are arranged in sequence; the third pipe section (130) is connected to the first pipe section (110).
3. The test device for simulating an erosion environment in which the concentration of a water corrosive medium changes alternately according to claim 2, characterized in that: The testing mechanism (300) comprises: a test assembly (310), wherein an input end of the test assembly (310) is in communication with the second pipe section (120), an output end of the test assembly (310) is in communication with the third pipe section (130), and the test assembly (310) is used to define a position of the concrete specimen (10); a first water stop valve (320), the first water stop valve (320) being arranged at the output end of the second pipe section (120), the first water stop valve (320) being located between the second pipe section (120) and the third pipe section (130); A second water stop valve (330), the second water stop valve (330) is arranged at the output end of the test assembly (310), and the second water stop valve (330) is located between the test assembly (310) and the third pipe section (130).
4. The test device for simulating an erosion environment in which the concentration of a water corrosive medium changes alternately according to claim 3, characterized in that: The test component (310) comprises: a sleeve (311), one end of the sleeve (311) being sleeved on the second pipe section (120), and the other end being sleeved on the third pipe section (130); the inner diameter of the sleeve (311) being the same as the outer diameter of the second pipe section (120); and the inner diameter of the sleeve (311) being the same as the outer diameter of the third pipe section (130); and the sleeve (311) being used for fixing the concrete specimen (10); A locking member (312) is provided on the sleeve (311), and the locking member (312) is used to fix the sleeve (311) on the second pipe section (120) and the third pipe section (130).
5. The test device for simulating an erosion environment in which the concentration of a water corrosive medium changes alternately according to claim 4, characterized in that: The sleeve (311) comprises an upper shell (3111) and a lower shell (3112), wherein the upper shell (3111) and the lower shell (3112) are detachably connected, and the locking member (312) is sleeved on the outer walls of the upper shell (3111) and the lower shell (3112).
6. The test device for simulating an erosion environment in which the concentration of a water corrosive medium changes alternately according to claim 4, characterized in that: Two slots (3113) are provided on the inner wall of the sleeve (311) along the axial direction. The open ends of the two slots (3113) are arranged opposite to each other. The two slots (3113) both correspond to the thickness of the concrete specimen (10). The concrete specimen (10) is inserted into the slots (3113) along the axial direction of the sleeve (311).
7. The test device for simulating an erosion environment in which the concentration of a water corrosive medium changes alternately according to claim 1, characterized in that: The solution tank (200) is transparent.
8. The test device for simulating an erosion environment in which the concentration of a water corrosive medium changes alternately according to claim 2, characterized in that: An electromagnetic flowmeter (121) is provided on the second pipe section (120), and the electromagnetic flowmeter (121) is used to record the flow rate of the liquid in the second pipe section (120).
9. The test device for simulating an erosion environment in which the concentration of a water corrosive medium changes alternately according to claim 1, characterized in that: The pump body (400) is a variable frequency water pump, which is used to achieve precise regulation of water flow, water pressure, and water flow rate.
10. The test device for simulating an erosion environment in which the concentration of a water corrosive medium changes alternately according to claim 1, characterized in that: The water circulation pipe (100) is made of PVC.