A test device

Abstract

The utility model discloses a test device, including liquid storage control system, flush system and test system, liquid storage control system includes liquid storage tank, salinity sensor, water temperature sensor and temperature adjusting spare, salinity sensor sets up in liquid storage tank for monitoring the liquid salinity in liquid storage tank, water temperature sensor sets up in liquid storage tank for monitoring the liquid temperature in liquid storage tank, temperature adjusting spare sets up in liquid storage tank for adjusting the liquid temperature in liquid storage tank, flush system includes water pump, and water pump is connected with liquid storage tank, test system includes test box, and test box is equipped with test cavity, and test cavity can be used for placing the test piece (such as concrete test piece) of waiting, and water pump is used for pumping liquid flush test piece, the utility model discloses a test device, it can simulate " high temperature, high salt, high -speed water flow flush " environment's influence to concrete structure, is favorable to people close to actual working condition and studies the anti -chlorine ion erosion performance of concrete structure.

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment technology, and specifically relates to a testing device. Background Technology

[0002] Nuclear power plants located near coastal areas have their circulating water piping systems' concrete structures subjected to complex and harsh corrosive environments for extended periods. These environments typically possess several notable characteristics: (1) High temperature: The temperature of the circulating water increases significantly after passing through the cooling nuclear reactor; (2) High salinity: Nuclear power plants often use seawater or brackish water as cooling medium, and the circulating water contains high concentrations of chloride ions and other salts; (3) High-speed water flow scouring: The circulating water flows at high speed in the pipe, which produces a continuous physical scouring effect on the surface of the concrete structure.

[0003] In this environment of high temperature, high salinity, and high-speed water flow (multi-factor coupling), chloride ions will accelerate their penetration into the interior of the concrete structure, causing corrosion and expansion of the steel reinforcement inside the concrete structure, thereby seriously threatening the durability and service safety of the concrete structure.

[0004] Existing chloride ion corrosion testing methods are mostly static immersion in saturated brine or wet-dry cycle tests. While these methods can simulate a brine environment, they neglect the accelerating effect of high temperatures on ion diffusion rates and the physical erosion effect of high-speed water flow on concrete structures. Therefore, existing testing methods cannot accurately and comprehensively reproduce the actual operating conditions of nuclear power plant circulating water piping systems, leading to significant discrepancies between test results and actual engineering conditions, and making it impossible to accurately assess the long-term performance of concrete materials under such harsh conditions.

[0005] Therefore, it is necessary to develop a new type of experimental device to simulate the effects of a "high temperature, high salt, and high-speed water flow" environment on concrete structures, so that people can study the chloride ion erosion resistance of concrete structures in close accordance with actual working conditions. Utility Model Content

[0006] To address the aforementioned problems in the prior art, this utility model provides a testing device that can simulate the effects of a "high temperature, high salinity, and high-speed water flow" environment on concrete structures.

[0007] The present invention adopts the following technical solution: A testing apparatus includes a liquid storage and control system, a flushing system, and a testing system. The liquid storage and control system includes a storage tank, a salinity sensor, a water temperature sensor, and a temperature regulating component. The salinity sensor is disposed in the storage tank and is used to monitor the salinity of the liquid in the storage tank. The water temperature sensor is disposed in the storage tank and is used to monitor the temperature of the liquid in the storage tank. The temperature regulating component is disposed in the storage tank and is used to regulate the temperature of the liquid in the storage tank. The flushing system includes a water pump connected to the storage tank. The testing system includes a test chamber with a test cavity for placing a test specimen. The water pump is used to pump liquid to flush the test specimen.

[0008] Furthermore, the liquid storage control system also includes a pressure sensor; the pressure sensor is installed in the liquid storage tank and is used to detect the pressure inside the liquid storage tank.

[0009] Furthermore, the liquid storage control system also includes a pressure relief valve, which is installed in the liquid storage tank for depressurizing the liquid storage tank.

[0010] Furthermore, the liquid storage and regulation system also includes a control system; one or more of the salinity sensor, the water temperature sensor, and the temperature regulating element are connected to the control system.

[0011] Furthermore, the flushing system also includes an inlet valve; the inlet of the water pump is connected to the outlet of the storage tank through the inlet valve.

[0012] Furthermore, the flushing system also includes a nozzle; the outlet of the water pump is connected to the nozzle; the nozzle is used to flush the specimen in the test chamber.

[0013] Furthermore, the flushing system also includes a pressure gauge; the pressure gauge is connected to the pipeline between the outlet of the water pump and the nozzle, and the pressure gauge is used to monitor the outlet pressure of the liquid in the pipeline applied to the nozzle.

[0014] Furthermore, an experimental apparatus also includes a water replenishment system; the water replenishment system includes a pure water switch and a solenoid valve; one end of the pure water switch is connected to the inner cavity of the storage tank in a timely manner, and the other end of the pure water switch is connected to the incoming flow pipe or the external environment; the pure water switch is connected to the solenoid valve, and the solenoid valve is used to block or open the water supply channel of the pure water switch in a timely manner.

[0015] Furthermore, an experimental apparatus also includes a filtration and reflux system; the filtration and reflux system includes a delivery pipe and a filter element, one end of the delivery pipe is connected to the experimental chamber, and the other end is connected to the inner cavity of the liquid storage tank; the filter element is disposed on the delivery pipe and is used for filtering the liquid.

[0016] Furthermore, the filter element is one or more of a metal filter screen and a cartridge filter.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model discloses a test device, whose storage tank can store the liquid used for flushing (such as high-temperature, high-salinity water). The storage tank is equipped with a salinity sensor to monitor the salinity of the liquid in the storage tank, so as to control the salinity of the liquid at the concentration required for the test. The storage tank is also equipped with a water temperature sensor to monitor the temperature of the liquid in the storage tank. A temperature regulating component is used to adjust the temperature of the liquid in the storage tank so that the liquid temperature can meet the test requirements. The water pump can spray the liquid (such as high-temperature, high-salinity water) in the storage tank onto the specimen (such as a concrete specimen) at high speed.

[0018] This invention relates to an experimental device that can simulate the effects of a "high temperature, high salt, and high-speed water flow" environment on concrete structures. This allows researchers to study the chloride ion erosion resistance of concrete structures in close proximity to actual working conditions and provides technical support for the durability design and life assessment of concrete structures in nuclear power plant circulating water pipeline systems. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a simplified diagram showing the connection relationships of the experimental setup.

[0020] Figure label: 1-Storage tank; 2-Salinity sensor; 3-Water temperature sensor; 4-Temperature regulator; 5-Water pump; 6-Test chamber; 7-Test cavity; 8-Specimen; 9-Maximum water level line; 10-Minimum water level line; 11-Pressure sensor; 12-Pressure relief valve; 13-Inlet valve; 14-Nozzle; 15-Pressure gauge; 16-Pure water switch; 17-Solenoid valve; 18-Transportation pipeline; 19-Metal filter screen; 20-Cartridge filter. Detailed Implementation

[0021] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0022] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," and "right" used in this utility model are only relative to the relative positional relationships of the various components of this utility model in the accompanying drawings.

[0023] Reference Figure 1 A testing apparatus includes a liquid storage and control system, a flushing system, and a testing system. The liquid storage and control system includes a liquid storage tank 1, a salinity sensor 2, a water temperature sensor 3, and a temperature regulating component 4. The salinity sensor 2 is disposed in the liquid storage tank 1 to monitor the salinity of the liquid in the liquid storage tank 1. The water temperature sensor 3 is disposed in the liquid storage tank 1 to monitor the temperature of the liquid in the liquid storage tank 1. The temperature regulating component 4 is disposed in the liquid storage tank 1 to regulate the temperature of the liquid in the liquid storage tank 1. The flushing system generates a high-speed test water flow to flush the specimen 8. The flushing system includes a water pump 5 connected to the liquid storage tank 1. The testing system includes a test chamber 6 with a test cavity 7 for placing the specimen 8 to be tested (such as a concrete specimen). The water pump 5 pumps liquid to flush the specimen 8.

[0024] Reference Figure 1 In one embodiment, the liquid storage tank 1 is provided with a highest water level line 9 and a lowest water level line 10 for determining the liquid level.

[0025] Preferably, the liquid storage tank 1 is provided with an inlet, which is used to facilitate people to input liquid into the liquid storage tank 1.

[0026] Reference Figure 1 In one embodiment, the temperature regulating element 4 is a heating copper wire, which is used to heat the liquid in the storage tank 1 to achieve temperature regulation.

[0027] Reference Figure 1 In one embodiment, the liquid storage control system further includes a pressure sensor 11; the pressure sensor 11 is disposed in the liquid storage tank 1 and is used to detect the pressure inside the liquid storage tank 1.

[0028] Reference Figure 1In one embodiment, the liquid storage control system further includes a pressure relief valve 12, which is disposed in the liquid storage tank 1 and is used to relieve pressure in the liquid storage tank 1.

[0029] In one embodiment, the liquid storage control system further includes a control system; one or more of the salinity sensor 2, the water temperature sensor 3, the temperature regulator 4, the pressure sensor 11, and the pressure relief valve 12 are connected to the control system.

[0030] In one embodiment, the control system is a controller, wherein the controller may be found in the prior art.

[0031] In one embodiment, the water temperature sensor 3 is directly or indirectly electrically connected to the temperature regulating component 4; preferably, the water temperature sensor 3 is connected to the temperature regulating component 4 through the control system; preferably, the temperature regulating component 4 is a heating copper wire, and when the water temperature sensor 3 detects that the liquid temperature in the storage tank 1 is lower than the set value, the control system activates the heating copper wire to heat the liquid to maintain a constant high temperature in the storage tank 1.

[0032] Reference Figure 1 In one embodiment, the flushing system further includes an inlet valve 13; the inlet of the water pump 5 is connected to the outlet of the storage tank 1 through the inlet valve 13.

[0033] Preferably, the inlet valve 13 is connected to the control system.

[0034] Reference Figure 1 In one embodiment, the flushing system further includes a nozzle 14; the outlet of the water pump 5 is connected to the nozzle 14; the nozzle 14 is used to flush the specimen 8 (such as a concrete specimen) in the test chamber 7.

[0035] In one embodiment, the present invention achieves flow rate adjustment by replacing nozzles of different specifications.

[0036] In this embodiment, the nozzle 14 is an adjustable flow rate nozzle, used to simulate different scouring speeds of water flow to scour the surface of the specimen 8; the adjustable flow rate nozzle may be a nozzle with an adjustable diameter. Preferably, after the adjustable flow rate nozzle is set, its outlet end faces the inside of the test chamber 7, used to scour the specimen 8 (such as a concrete specimen) placed in the test chamber 7.

[0037] Reference Figure 1In one embodiment, the flushing system further includes a pressure gauge 15; the pressure gauge 15 is connected to the pipeline between the outlet of the water pump 5 and the nozzle 14, and the pressure gauge 15 is used to monitor the outlet pressure of the liquid in the pipeline applied to the nozzle 14.

[0038] Preferably, the water pump 5 is connected to the control system.

[0039] Reference Figure 1 In one embodiment, the test apparatus further includes a water replenishment system; the water replenishment system includes a pure water switch 16 and a solenoid valve 17; one end of the pure water switch 16 is connected to the inner cavity of the liquid storage tank 1 in a timely manner, and the other end of the pure water switch 16 is connected to the incoming flow pipe or the external environment; the pure water switch 16 is connected to the solenoid valve 17, and the solenoid valve 17 is used to block or open the water supply channel of the pure water switch 16 in a timely manner.

[0040] In one embodiment, the salinity sensor 2 is directly or indirectly electrically connected to the solenoid valve 17; preferably, the salinity sensor 2 is connected to the solenoid valve 17 through the control system; when the salinity sensor 2 detects that the liquid salinity in the storage tank 1 is higher than a set value, the control system controls the solenoid valve 17 to open, and pure water is added through the pure water switch 16 to maintain the stability of the liquid salinity in the storage tank 1.

[0041] Reference Figure 1 In one embodiment, a test apparatus further includes a filtration and reflux system for filtering the liquid after the test and returning it to the storage tank 1; the filtration and reflux system includes a delivery pipe 18 and a filter element, one end of the delivery pipe 18 is connected to the test chamber 7 and the other end is connected to the inner cavity of the storage tank 1; the filter element is disposed on the delivery pipe 18 for filtering the liquid.

[0042] In one embodiment, the filter element is one or more of a metal filter screen 19 and a core filter 20.

[0043] Reference Figure 1In this embodiment, the filtration reflux system adopts a two-stage filtration design, with both a metal filter screen 19 and a core filter 20 as the filter elements. Specifically, the metal filter screen 19 is provided at one end of the conveying pipe 18 connected to the test chamber 7, and the metal filter screen 19 is used to filter large particles of debris that have detached from the concrete specimen. The core filter 20 is connected in series on the conveying pipe 18, and the other end of the conveying pipe 18 is connected to the upper part of the storage tank 1, so that the entire test device forms a closed loop. The core filter 20 is used for fine filtration to prevent impurities in the loop from damaging the water pump 5 or clogging the adjustable flow rate nozzle.

[0044] Reference Figure 1 In one embodiment, the application process of the experimental device of this utility model is as follows: Before conducting the experiment, pure water is first injected into the storage tank 1 through the pure water switch 16, and a certain amount of salt (such as NaCl) is added to prepare a test liquid of a specified concentration.

[0045] Maintaining a constant temperature and high salinity environment: After the liquid storage control system is activated, the water temperature sensor 3 in the liquid storage tank 1 monitors the liquid temperature in the tank in real time. If the liquid temperature is lower than a preset value (e.g., below 50°C), the control system connects the power supply to the heating copper wire for heating. Once the set temperature is reached, the control system disconnects the power supply to the heating copper wire and stops heating. This process is repeated to precisely maintain the liquid in the liquid storage tank 1 at the target high temperature. Simultaneously, the salinity sensor 2 monitors the salinity changes in the liquid in the storage tank 1 due to water evaporation. When the salinity sensor 2 detects that the liquid salinity is higher than the set threshold, the control system opens the solenoid valve 17, and the pure water switch 16 opens the water supply channel, replenishing the liquid storage tank 1 with pure water until the liquid salinity in the tank 1 returns to the set range, thereby maintaining the long-term stability of the liquid salinity during the test period.

[0046] Achieving high-speed water flow rinsing: The water pump 5 is activated, and the high-temperature, high-salt liquid in the storage tank 1 is drawn into the pump 5 through the inlet valve 13, and then sprayed at high speed from the nozzle 14 to rinse the surface of the concrete specimen in the test chamber 7 (standardized continuous rinsing). The operator can adjust the output power of the water pump 5 by observing the reading on the pressure gauge 15 to precisely control the rinsing pressure to the required set value for the test (e.g., 0.5 MPa).

[0047] Closed-loop circulation and filtration: During the process of nozzle 14 rinsing the concrete specimen, liquid flows out from the outlet of test chamber 6. After flowing out, the liquid first undergoes preliminary filtration through the metal filter screen 19 (filtering out large particulate impurities). Then, the liquid enters the cartridge filter 20 along the conveying pipe 18 for fine filtration to completely remove suspended fine particles. Finally, the liquid that has undergone dual-stage filtration flows back to the storage tank 1, completing one closed-loop circulation.

[0048] Implementation of pressure safety protection: In addition to precise control of "liquid temperature, liquid salinity, and liquid flow rate," this test apparatus also fully considers the safety of the test apparatus under high-temperature operation. A pressure sensor 11 is installed on the top of the liquid storage tank 1 to monitor the vapor pressure inside the tank 1 in real time (vapor pressure is generated when the liquid evaporates due to heat). The control system has a preset safety threshold. Once the pressure sensor 11 detects that the internal pressure of the liquid storage tank 1 exceeds the set threshold, the control system controls the pressure relief valve 12 to open, releasing some of the gas inside the liquid storage tank 1, allowing the pressure inside the tank 1 to quickly drop back to a safe range. This safety protection mechanism effectively avoids the operational risks caused by pressure overload of the liquid storage tank 1, ensuring the stability and safety of the entire test process.

[0049] The test apparatus operates continuously in a closed loop, which keeps the concrete specimens under a coupled environment of "high temperature, high salt, and high-speed water flow" for a long time and stably. This allows for an effective and accurate study of the chloride ion erosion behavior and durability of the concrete specimens under this extreme environment.

[0050] In one embodiment, the experimental apparatus of this utility model has the following advantages: (1) Multi-factor coupling simulation: This device simulates the coupled environment of "high temperature, high salinity, and high speed water flow scouring" in one device through the liquid storage control system, flushing system, test system, water replenishment system and filtration return system. It can independently control the three influencing factors of "temperature, salinity and water flow scouring speed", which truly restores the working conditions of the nuclear power plant circulating water pipeline system. The test results are more practical and instructive.

[0051] (2) Automation and stability: The water temperature sensor 3 is controlled by the control system and the temperature regulating component 4 to achieve automated and precise control of liquid temperature; the salinity sensor 2 is controlled by the control system and the electromagnetic valve 17 to achieve automated and precise control of liquid salinity; this design of the present invention ensures the long-term stability of the test conditions of the test device and reduces manual intervention.

[0052] (3) The flushing effect is precise and controllable: This test device converts the vague "water flow velocity" into a precise "pressure" parameter by setting a pressure gauge 15 on the pipeline between the outlet of the water pump 5 and the nozzle 14, thereby realizing real-time monitoring of the flushing pressure of the flushing water flow, which is beneficial to the quantitative adjustment of the flushing pressure.

[0053] (4) Self-protection of the test device: The filtration and reflux system adopts a two-stage filtration design, which can effectively remove concrete debris carried by the liquid in the circulation loop, protect the core components such as water pump 5 and nozzle 14, and improve the service life of the test device.

[0054] (5) High safety: Through pressure sensor 11, control system and pressure relief valve 12, excess steam pressure (steam pressure generated by heating) can be monitored in real time and released automatically, which effectively prevents the safety risks caused by overpressure operation of liquid storage tank 1, making the test device safer and more reliable in operation.

[0055] Other aspects of the experimental device described in this utility model are found in the prior art and will not be repeated here.

[0056] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A testing apparatus, characterized in that, The system includes a liquid storage and control system, a flushing system, and a testing system. The liquid storage and control system includes a storage tank, a salinity sensor, a water temperature sensor, and a temperature regulator. The salinity sensor is located in the storage tank and is used to monitor the salinity of the liquid in the tank. The water temperature sensor is located in the storage tank and is used to monitor the temperature of the liquid in the tank. The temperature regulator is located in the storage tank and is used to regulate the temperature of the liquid in the tank. The flushing system includes a water pump connected to the storage tank. The testing system includes a test chamber with a test cavity for holding the test specimen. The water pump is used to pump liquid to flush the test specimen.

2. The experimental apparatus according to claim 1, characterized in that, The liquid storage control system also includes a pressure sensor; the pressure sensor is installed in the liquid storage tank and is used to detect the pressure inside the liquid storage tank.

3. The experimental apparatus according to claim 1, characterized in that, The liquid storage control system also includes a pressure relief valve, which is installed in the liquid storage tank and is used to relieve pressure in the liquid storage tank.

4. The testing apparatus according to claim 1, characterized in that, The liquid storage and regulation system also includes a control system; one or more of the salinity sensor, the water temperature sensor, and the temperature regulating element are connected to the control system.

5. The testing apparatus according to claim 1, characterized in that, The flushing system also includes an inlet valve; the inlet of the water pump is connected to the outlet of the storage tank through the inlet valve.

6. The testing apparatus according to claim 1, characterized in that, The flushing system also includes a nozzle; the outlet of the water pump is connected to the nozzle; the nozzle is used to flush the specimen in the test chamber.

7. The testing apparatus according to claim 6, characterized in that, The flushing system also includes a pressure gauge; the pressure gauge is connected to the pipeline between the outlet of the water pump and the nozzle, and the pressure gauge is used to monitor the outlet pressure of the liquid in the pipeline applied to the nozzle.

8. The testing apparatus according to claim 1, characterized in that, It also includes a water replenishment system; the water replenishment system includes a pure water switch and a solenoid valve; one end of the pure water switch is connected to the inner cavity of the storage tank in a timely manner, and the other end of the pure water switch is connected to the incoming flow pipe or the external environment; the pure water switch is connected to the solenoid valve, and the solenoid valve is used to block or open the water supply channel of the pure water switch in a timely manner.

9. A testing apparatus according to any one of claims 1 to 8, characterized in that, It also includes a filtration and reflux system; the filtration and reflux system includes a delivery pipe and a filter element, one end of the delivery pipe is connected to the test chamber and the other end is connected to the inner cavity of the storage tank; the filter element is installed on the delivery pipe and is used for filtering the liquid.

10. The testing apparatus according to claim 9, characterized in that, The filter element is one or more of a metal filter screen and a cartridge filter.

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