Multifunctional hydraulic water quality test bench and test method

Abstract

The present application relates to HVAC water system detection technical field, especially a kind of multifunctional hydraulic water quality test platform, including water circulation mechanism, working condition simulation mechanism and control unit.Water circulation mechanism includes circulation pipeline, water pump, capacity unit, constant pressure water replenishment unit and interface unit.Capacity unit changes water capacity by means of air pressure tank air pressure adjustment and is measured in weighing mode;Constant pressure water replenishment unit stabilizes circulation pipeline pressure;Interface unit is arranged according to water pump import side and export side partition.Working condition simulation mechanism includes at least two kinds of gas accumulation simulation unit, water loss simulation unit and water hammer simulation unit, to simulate gas accumulation, water loss pressure loss and water hammer and other working conditions.Control unit monitors operating state and parameter on line, records change curve, and controls multiple operating condition combination occurrence according to preset combination strategy.The present application also contains test method, simultaneously completes hydraulic characteristic test, water quality detection, fault condition simulation and accessory performance verification, supports multiple equipment parallel test.

Description

Technical Field

[0001] This invention relates to the field of HVAC water system testing technology, and in particular to a multifunctional hydraulic water quality testing bench and testing method. Background Technology

[0002] In the HVAC industry, large-scale product testing platforms are mainly used for the performance verification of high-power equipment such as air conditioners, heat pumps, fans, and water pumps. Common forms include enthalpy difference laboratories, operating condition rooms, noise laboratories, electromagnetic compatibility laboratories, safety structure analysis rooms, and air volume test rooms. The core testing objects are the equipment's parameters such as cooling capacity, heating capacity, air volume, and water flow.

[0003] The aforementioned testing platforms focus on the equipment itself and lack standardized testing devices for the overall hydraulic characteristics and water quality changes of the water system. They are unable to simulate complex operating conditions that occur in the actual operation of the water system, such as air accumulation, water loss, pressure loss, water hammer, impurity accumulation, and capacity changes. They also cannot verify the performance and control logic of water system accessories, and cannot meet the research and testing needs of water system component performance verification, system fault simulation, and hydraulic-water quality coupling analysis. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, the present invention aims to provide a multifunctional hydraulic and water quality testing platform and testing method to simulate the operating state of a real air conditioning water circulation system. This allows for precise adjustment and real-time monitoring of core hydraulic parameters such as water system pressure, water capacity, flow rate, and flow velocity. It also enables the simulation and quantitative detection of typical fault conditions such as impurity filtration, gas accumulation and exhaust, water loss and pressure loss, overpressure operation, and water hammer. Furthermore, it supports parallel testing of multiple devices and online monitoring, control, and curve recording of parameters under all operating conditions.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is to provide a multifunctional hydraulic water quality testing platform, characterized in that it includes a water circulation mechanism, a working condition simulation mechanism, and a control unit.

[0006] The water circulation mechanism includes a circulation pipeline, a water pump, a capacity unit, a constant pressure water supply unit, and an interface unit. The circulation pipeline forms a closed circulation loop. The water pump and the capacity unit are both connected to the circulation pipeline. The capacity unit is used to adjust the water volume in the circulation pipeline. The constant pressure water supply unit is used to stabilize the pressure in the circulation pipeline. The interface unit includes at least two first interfaces and at least two second interfaces located in the circulation pipeline. The first interfaces and the second interfaces are used to connect to the device under test. The first interfaces are located in the pipeline section where the water pump is located at the inlet side, and the second interfaces are located in the pipeline section where the water pump is located at the outlet side.

[0007] The operating condition simulation mechanism is used to simulate operating conditions and includes at least two of the following: a gas accumulation simulation unit, a water loss simulation unit, and a water hammer simulation unit.

[0008] The control unit includes a programmable logic controller; the control unit is electrically connected to the water pump and is used to monitor the operating status and operating parameters of the test bench online, and to control the actions of the at least two operating condition simulation units to control the operating conditions of the test bench; the control unit is also used to record the change curves of the operating parameters and control the occurrence of multiple operating condition combinations according to a preset combination strategy.

[0009] Furthermore, the capacity unit includes a pressure tank and a filling / draining component; the filling / draining component includes a filling valve and a drain valve, connected to the air side of the pressure tank; the water side of the pressure tank is connected to the circulation pipeline; the filling valve is used to pressurize the air side, and the drain valve is used to release the gas on the air side to relieve pressure, thereby adjusting the air pressure in the pressure tank to change the water capacity in the test bench;

[0010] The capacity unit also includes a pressure transmitter and a weighing sensor; the pressure transmitter is used to detect the air pressure on the air side; the weighing sensor is located in the pressure tank and is used to detect the weight of the pressure tank.

[0011] The control unit is electrically connected to the inflation valve, the deflation valve and the weighing sensor respectively, and is also used to determine the water volume in the test bench based on the detection value of the weighing sensor.

[0012] Furthermore, the constant pressure water supply unit includes a constant pressure water supply device; the constant pressure water supply device is connected to the circulation pipeline and supplies water to the circulation pipeline to stabilize the pressure in the circulation pipeline at a set pressure;

[0013] The control unit is electrically connected to the constant pressure water supply device and is used to control the operation of the constant pressure water supply device.

[0014] Furthermore, the water pump is a variable frequency water pump, and / or a flow regulating valve is provided on the circulation pipeline to regulate the circulation flow rate.

[0015] Furthermore, the gas accumulation simulation unit includes an injection pipeline, an injection valve, and an exhaust valve; the injection valve is installed on the injection pipeline and is electrically connected to the control unit; the injection pipeline is connected to an external gas source and injects gas into the circulation pipeline through the injection valve; the exhaust valve is located at a high point in the circulation pipeline to discharge the gas in the circulation pipeline.

[0016] The gas injection pipeline is also equipped with a check valve and a ball valve; the check valve allows gas to flow from the external gas source to the circulation pipeline and prevents water in the circulation pipeline from flowing back to the external gas source; the ball valve is used to open and close the gas injection pipeline.

[0017] Furthermore, the water loss simulation unit includes a drainage pipe connected to the circulation pipeline, and a regulating valve and a drain valve disposed on the drainage pipe; the regulating valve and the drain valve are respectively electrically connected to the control unit; the regulating valve is used to cause the test bench to slowly lose water by adjusting the opening degree, and the drain valve is used to cause the test bench to quickly lose water by opening and closing.

[0018] Furthermore, the water hammer simulation unit includes at least two solenoid valves with different diameters connected to the circulation pipeline, and the solenoid valves are electrically connected to the control unit; under the control of the control unit, the at least two solenoid valves open and close rapidly to generate a water hammer effect.

[0019] Furthermore, the circulation pipeline is provided with a feeding port for adding impurities into the circulation pipeline;

[0020] The circulation pipeline is also equipped with a filtration assembly, which includes a dirt separator and a filter, as well as a bypass valve group. The bypass valve group is configured to allow water to flow through or bypass the dirt separator. Pressure detection elements are respectively provided on the upstream and downstream sides of the dirt separator for detecting the pressure loss of the dirt separator.

[0021] Furthermore, it also includes a status observation mechanism, which includes an observation window and a water quality detection device located in the circulation pipeline; the observation window is used to observe the status of the water in the circulation pipeline, and the water quality detection device is used to detect the water quality indicators of the water.

[0022] This invention also discloses a water system testing method, implemented using the aforementioned multifunctional hydraulic and water quality testing platform, characterized by comprising the following steps:

[0023] Step S10: Start the water pump to circulate the water in the circulation pipeline and adjust the circulation flow rate;

[0024] Step S20: Based on the operating conditions to be simulated, the control unit controls at least one simulation unit in the operating condition simulation mechanism to simulate the corresponding operating conditions in the circulation pipeline.

[0025] Step S30: Use the control unit to collect the operating parameters of the circulation pipeline and record the change curve of the operating parameters.

[0026] In view of the above technical features, the multifunctional hydraulic water quality testing platform and testing method of the present invention have the following significant advantages compared with the prior art:

[0027] 1. The water circulation mechanism of this invention replicates the main structure of a real air conditioning water circulation system. The operating condition simulation mechanism injects fault conditions such as air accumulation, water loss, and water hammer into the real system. The status observation mechanism and control unit complete parameter acquisition and curve recording. The test bench integrates hydraulic characteristic testing, water quality index detection, fault condition simulation, and accessory performance verification on the same closed loop, completing multi-dimensional testing of the water system in one stop, reducing R&D and testing costs, and providing a standardized testing platform for HVAC water system product development, performance calibration, and fault analysis.

[0028] 2. The capacity unit of this invention changes the water capacity through air pressure regulation and measures it by weighing. The constant pressure water supply unit stabilizes the pressure at a settable value, and the variable frequency water pump and flow regulating valve finely regulate the circulating flow rate. That is, the core hydraulic parameters such as pressure, water capacity, flow rate, and flow velocity are precisely adjustable and reproducible, the operating conditions can be controlled and triggered according to preset combination strategies, and the test results are stable and traceable.

[0029] 3. The interface unit of the present invention is arranged in sections according to the inlet and outlet sides of the water pump. There is almost no pressure difference between the first interface and the second interface, which can connect multiple devices under test for parallel testing at the same time. It is also compatible with both devices under test with their own water pump and those without, thus improving the testing efficiency.

[0030] 4. The control unit of this invention monitors operating parameters online and records change curves. The testing process is intuitive and verifiable, facilitating data analysis and optimization. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structural principle of a preferred embodiment of the multifunctional hydraulic and water quality testing bench of the present invention;

[0032] Figure 2 This is a flowchart of a preferred embodiment of the testing method of the present invention using a multifunctional hydraulic water quality testing platform.

[0033] In the diagram: 1-High-level vent valve; 2-Thermometer; 3-Feeding port; 4-Electromagnetic flow meter; 5-Flow regulating valve; 6-Observation window; 7-Pressure gauge; 8-Pressure sensor; 9-Butterfly valve; 10-Strainer; 11-Butterfly valve; 12-Flexible connection; 13-Butterfly valve; 14-Pressure sensor; 15-Pressure gauge; 16-Flexible connection; 17-Observation window; 18-High-level vent valve; 19-Manual drain valve; 20-First interface; 21-First interface; 22-First interface; 23-First interface; 24-Second interface; 25-Second interface; 26-Butterfly valve; 27-Butterfly valve; 2 8-Filter; 29-Flexible connection; 30-Water pump; 31-Flexible connection; 33-Tank valve; 34-Tank bypass valve; 35-Tank valve; 36-Regulating valve; 37-Drain valve; 38-Solenoid valve; 39-Solenoid valve; 40-Air injection valve; 41-Check valve; 42-Ball valve; 43-Pressure transmitter; 44-Ball valve; 45-Air filling valve; 46-Air venting valve; 47-Pressure tank; 48-Weighing sensor; 49-Constant pressure water supply device; 51-First water quality probe; 52-Second water quality probe; 53-Third water quality probe; 54-Fourth water quality probe; 60-Control unit. Detailed Implementation

[0034] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0035] Example 1: A multifunctional hydraulic and water quality testing platform.

[0036] Please see Figure 1 This invention discloses a multifunctional hydraulic water quality testing platform. As shown in the figure, a preferred embodiment includes a water circulation mechanism, a working condition simulation mechanism, and a control unit 60.

[0037] The water circulation mechanism includes a circulation pipeline, a water pump 30, a capacity unit, a constant pressure water supply unit, and an interface unit. The circulation pipeline forms a closed circulation loop, with the main pipeline using a DN100 pipe diameter. The water pump 30 and the capacity unit are both connected to the circulation pipeline. The capacity unit is used to regulate the water volume within the circulation pipeline. The constant pressure water supply unit is used to stabilize the pressure within the circulation pipeline. The interface unit includes at least two first interfaces and at least two second interfaces located in the circulation pipeline for connecting the device under test. Specifically, first interfaces 20, 21, 22, and 23 are located in the pipeline section at the inlet side of the water pump 30, in the low-pressure zone before the pump, with almost no pressure difference between the interfaces. Second interfaces 24 and 25 are located in the pipeline section at the outlet side of the water pump 30, in the high-pressure zone after the pump.

[0038] The operating condition simulation mechanism includes at least two of the following: a gas accumulation simulation unit, a water loss simulation unit, and a water hammer simulation unit. This embodiment uses all three as an example for illustration.

[0039] The core component of the control unit 60 is a programmable logic controller (PLC). The control unit 60 is electrically connected to the water pump 30 and is used for online monitoring of the test bench's operating status and parameters, controlling the actions of at least two operating condition simulation units, recording the change curves of operating parameters, and controlling the occurrence of multiple operating condition combinations according to a preset combination strategy. The preset combination strategy includes triggering sequences and / or linkage rules according to pre-set operating conditions, such as a linkage rule of "triggering air injection when a set pressure threshold is reached," or a sequence rule of triggering water loss and water hammer according to a preset time sequence; specific strategies can be set by the operator via the control interface. In this embodiment, the control unit 60 is implemented using a PLC, such as a Siemens SIMATIC S7-200 SMART CPU SR20, and is equipped with a control interface for online viewing, setting of operating parameters, and display of parameter curves.

[0040] The capacity unit includes a pressure tank 47 and a filling / discharging component. The pressure tank 47 is a diaphragm pressure tank, with its gas side and water side separated by a diaphragm. The filling / discharging component includes a filling valve 45 and a discharging valve 46, both connected to the gas side of the pressure tank 47. The water side of the pressure tank 47 is connected to a circulation pipeline. The filling valve 45 is used to pressurize the gas side. When the filling valve 45 is open to pressurize the gas side, the diaphragm deforms towards the water side, forcing water from the water side into the circulation pipeline, increasing the system water capacity. The discharging valve 46 is used to release gas from the gas side. When the discharging valve 46 is open to release gas from the gas side, the diaphragm rebounds, and water flows back from the circulation pipeline to the water side, decreasing the system water capacity and thus changing the water capacity within the test bench. A ball valve 44 is also installed on the gas side pipeline.

[0041] The capacity unit also includes a pressure transmitter 43 and a load cell 48. The pressure transmitter 43 is used to detect the air pressure on the air side; the load cell 48 is located at the bottom support of the pressure tank 47 and is used to detect the weight of the pressure tank 47. The control unit 60 is electrically connected to the inflation valve 45, the deflation valve 46, and the load cell 48, and determines the water volume in the test bench based on the detection value of the load cell 48. Specifically, the water content is calculated by reading the value of the load cell 48 (the more water, the heavier the weight), thereby determining the water volume of the entire system.

[0042] In addition, the water side of the pressure tank 47 is connected to the circulation pipeline via tank access valves 33 and 35, and a bypass valve 34 is also installed on the circulation pipeline. All three valves (tank access valves 33 and 35 and bypass valve 34) are butterfly valves. During normal operation, tank access valves 33 and 35 are open, and bypass valve 34 is closed, allowing the pressure tank 47 to circulate water. During tests involving a large amount of contaminants, such as filtration accuracy tests, bypass valve 34 is opened, and tank access valves 33 and 35 are closed to prevent contaminants from entering the pressure tank 47.

[0043] The constant pressure water supply unit, denoted as constant pressure water supply device 49, is connected to the circulation pipeline and is used to supply water to the circulation pipeline to stabilize the pressure within the circulation pipeline at a set pressure. The constant pressure can be set within the range of 0.2 to 10 bar. The control unit 60 is electrically connected to the constant pressure water supply device 49 and is used to control the operation of the constant pressure water supply device 49. The constant pressure water supply device 49 has a control interface for setting parameters; by setting the set pressure to a high-pressure value higher than the normal operating pressure, the test bench can simulate overpressure conditions. The drain of the constant pressure water supply device 49 is connected to a drain ditch.

[0044] Pump 30 is a variable frequency pump, whose rotational speed can be changed by adjusting the power supply frequency, thereby regulating the circulation flow rate. Flexible connections 29 and 31 are respectively installed on the inlet and outlet sides of pump 30. A flow regulating valve 5 is also installed on the circulation pipeline; the circulation flow rate is adjusted manually by changing the valve opening. Together, these two systems allow the circulation flow rate to be adjusted within the range of 5 to 65 t / h. In this embodiment, the flow velocity in the corresponding DN100 main pipeline is approximately 0.2 to 2.5 m / s.

[0045] The gas accumulation simulation unit includes an injection pipeline, an injection valve 40, and an exhaust valve. The injection valve 40 is installed on the injection pipeline and is electrically connected to the control unit 60. The injection pipeline is connected to an external gas source and injects gas into the circulation pipeline through the injection valve 40. In this embodiment, there are two exhaust valves, namely a first exhaust valve 1 and a second exhaust valve 18, both located at high points in the circulation pipeline, used to discharge gas from the circulation pipeline.

[0046] A check valve 41 and a ball valve 42 are also installed on the gas injection line. The check valve 41 allows gas to flow from the external gas source to the circulation line and prevents water in the circulation line from flowing back to the external gas source. The ball valve 42 is used to open and close the gas injection line. After the gas injection valve 40 is opened, the gas from the external gas source enters the circulation line and accumulates at a high point, which can quantitatively simulate the gas accumulation condition in the pipeline. Subsequently, the exhaust effect of the first exhaust valve 1 and the second exhaust valve 18 can be tested. Furthermore, the first exhaust valve 1 and the second exhaust valve 18 are both components and replaceable test objects in this test bench: the exhaust valve under test is installed at a high point, and its exhaust effect can be quantitatively evaluated after gas injection.

[0047] The water loss simulation unit includes a drainage pipe connected to the circulation pipeline, and a regulating valve 36 and a drain valve 37 installed on the drainage pipe. The regulating valve 36 and drain valve 37 are electrically connected to the control unit 60. The regulating valve 36 is an electric proportional valve used to slowly deplete the test bench by adjusting its opening degree, simulating a small-opening leakage condition. The drain valve 37 is a solenoid valve used to rapidly deplete the test bench by opening and closing it, simulating a rapid water loss condition. During the water loss process, the pressure in the circulation pipeline decreases accordingly. Combined with the operating status settings of the constant pressure water replenishment unit, the pressure loss condition and its recovery capability can be tested. In addition, a manual drain valve 19 is also provided on the circulation pipeline for draining and venting the test bench.

[0048] The water hammer simulation unit includes at least two solenoid valves of different diameters connected to the circulation pipeline; in this embodiment, these are a first solenoid valve 38 (DN25) and a second solenoid valve 39 (DN20). The solenoid valves are electrically connected to a control unit 60. Under the control of the control unit 60, the first solenoid valve 38 and the second solenoid valve 39 rapidly open and close to generate a water hammer effect. The different diameters of the solenoid valves result in different flow capacities when they open and close, creating water hammers of varying intensities, thus providing conditions for water hammer protection and component impact resistance testing.

[0049] A feed port 3 is provided on the circulation pipeline for adding impurities into the circulation pipeline. A filtration assembly is also provided on the circulation pipeline, including a dirt separator 10 and a filter 28, as well as a bypass valve group. Pressure detection devices, namely pressure gauges 8 and 14 in this embodiment, are provided on the upstream and downstream sides of the dirt separator 10 to detect the pressure loss of the dirt separator 10. A bypass valve group is provided before and after the dirt separator 10. A butterfly valve 9 is provided on the upstream side of the main pipeline of the dirt separator 10, and a butterfly valve 13 is provided on the downstream side. A butterfly valve 11 and a flexible connection 12 are provided on the bypass branch. Closing butterfly valves 9 and 13 and opening butterfly valve 11 bypasses the dirt separator 10. A bypass valve group is also provided before and after the filter 28. A butterfly valve 26 is provided on the main pipeline, and a butterfly valve 27 is provided on the bypass branch; the two are interlocked to open one of them. Specifically, the filter 28 is a Y-type filter, and the dirt separator 10 is a spiral dirt separator and exhaust device. The filtration effect and pressure loss of the filter device can be quantitatively detected by comparing the changes in pressure detection values ​​before and after the addition of impurities during testing. A flexible connection 16 is also provided on the circulation pipeline downstream of the separator 10.

[0050] In this embodiment, the test bench also includes a status observation mechanism. The status observation mechanism includes multiple observation windows and water quality detection devices located in the circulation pipeline: the first observation window 6 and the second observation window 17 are used to observe the state of the water in the circulation pipeline, such as visually observing the water flow and appearance. The water quality detection devices include a first water quality probe 51, a second water quality probe 52, a third water quality probe 53, and a fourth water quality probe 54, used to detect water quality indicators. Water quality indicators include various parameters, such as pH value, conductivity, turbidity, and dissolved oxygen. The specific types of the first water quality probe 51, the second water quality probe 52, the third water quality probe 53, and the fourth water quality probe 54 are selected according to the testing requirements. The first water quality probe 51 and the second water quality probe 52 are located in one section of the circulation pipeline, while the third water quality probe 53 and the fourth water quality probe 54 are located in another section, thereby achieving multi-point water quality detection.

[0051] Furthermore, the circulation pipeline is also equipped with a thermometer 2, an electromagnetic flowmeter 4, a first pressure gauge 7, and a second pressure gauge 15, which are used to detect water temperature, circulation flow rate, and pipeline pressure, respectively, and are all connected to the online monitoring and curve recording of the control unit 60.

[0052] The following is a brief description of the working process of this test bench and the multi-condition combination test process.

[0053] During use, the device under test (DUT) is connected to the interface unit: DUTs with their own water pumps (such as constant pressure water supply equipment) can be connected to the first interface as the supply and return water interface. DUTs without their own water pumps (such as chemical dosing equipment) can be connected to the second interface for water inlet and the first interface for water outlet. Multiple DUTs can be connected simultaneously for parallel testing. Water system equipment such as bypass water processors, constant pressure water supply modules, liquid-cooled hydraulic distribution units (CDUs), and heat exchange modules can also be connected for testing.

[0054] The water pump 30 is started, and the water circulates within the circulation pipeline. The circulation flow rate is adjusted by the flow regulating valve 5 and / or the frequency converter of the water pump 30. The system pressure is stabilized by the constant pressure water supply unit, and the system water capacity is adjusted by the capacity unit. Based on this, the control unit 60 schedules various working condition simulation units according to a preset combination strategy: for example, the air injection valve 40 opens to inject air to simulate air accumulation, the regulating valve 36 opens to a small degree to simulate slow water loss, and the solenoid valves 38 / 39 open and close instantaneously to simulate water hammer, etc. It is worth noting that in this test bench, water flow velocity, slow pressure loss, rapid pressure loss, overpressure, air accumulation, and water hammer can all be randomly combined and occur to simulate various unexpected situations in a real circulation system. That is, various working conditions can operate independently or occur in combination, closely resembling actual engineering scenarios.

[0055] Example 2: A water system testing method.

[0056] Please see Figure 2This invention discloses a water system testing method, implemented using any of the aforementioned multifunctional hydraulic and water quality testing benches. As shown in the figure, a preferred embodiment includes the following steps:

[0057] Step S10: Start the water circulation mechanism.

[0058] Start the water pump to circulate the water in the test bench's circulation pipeline and adjust the circulation flow rate. For example, adjust the pump's operating frequency to the target value and / or adjust the opening of the flow control valve to achieve the set circulation flow rate. In this embodiment, this is a fixed value within the range of 5 to 65 t / h. Simultaneously, stabilize the pressure in the circulation pipeline at a set pressure using a constant pressure water supply device, which in this embodiment is a fixed value within the range of 0.2 to 10 bar. The system water capacity can be adjusted via the capacity unit.

[0059] Step S20: Start the working condition simulation.

[0060] Based on the operating conditions to be simulated, the control unit controls at least one simulation unit in the operating condition simulation mechanism to simulate the corresponding operating conditions within the circulation pipeline. For example: opening the air injection valve to inject gas into the circulation pipeline simulates a gas accumulation condition; opening the regulating valve to slowly dehydrate the test bench, or opening and closing the drain valve to rapidly dehydrate the test bench simulates a water loss and pressure loss condition; rapidly opening and closing solenoid valves of different diameters simulates a water hammer condition; adding impurities to the circulation pipeline simulates an impurity accumulation condition. Multiple operating conditions can be controlled by the control unit to occur simultaneously or sequentially according to a preset combination strategy to simulate complex and unexpected conditions in a real water system.

[0061] Step S30: Collect and record the operating parameters.

[0062] The control unit collects operating parameters within the circulation pipeline and records their variation curves. Operating parameters include, for example, pressure, flow rate, temperature, and water quality indicators. Based on this, testers analyze the performance of the tested equipment or the response of the water system under simulated operating conditions, completing hydraulic characteristic tests, water quality indicator detection, fault condition simulations, or accessory performance verification.

[0063] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A multifunctional hydraulic and water quality testing platform, characterized in that, Includes a water circulation mechanism, a working condition simulation mechanism, and a control unit; The water circulation mechanism includes a circulation pipeline, a water pump, a capacity unit, a constant pressure water supply unit, and an interface unit. The circulation pipeline forms a closed circulation loop. The water pump and the capacity unit are both connected to the circulation pipeline. The capacity unit is used to adjust the water volume in the circulation pipeline. The constant pressure water supply unit is used to stabilize the pressure in the circulation pipeline. The interface unit includes at least two first interfaces and at least two second interfaces located in the circulation pipeline. The first interfaces and the second interfaces are used to connect to the device under test. The first interfaces are located in the pipeline section where the water pump is located at the inlet side, and the second interfaces are located in the pipeline section where the water pump is located at the outlet side. The operating condition simulation mechanism is used to simulate operating conditions and includes at least two of the following: a gas accumulation simulation unit, a water loss simulation unit, and a water hammer simulation unit. The control unit includes a programmable logic controller; the control unit is electrically connected to the water pump and is used to monitor the operating status and operating parameters of the test bench online, and to control the actions of the at least two operating condition simulation units to control the operating conditions of the test bench; the control unit is also used to record the change curves of the operating parameters and control the occurrence of multiple operating condition combinations according to a preset combination strategy.

2. The multifunctional hydraulic water quality testing platform according to claim 1, characterized in that, The capacity unit includes a pressure tank and a filling / draining component; the filling / draining component includes a filling valve and a drain valve, which are connected to the air side of the pressure tank; the water side of the pressure tank is connected to the circulation pipeline; the filling valve is used to pressurize the air side, and the drain valve is used to release the gas on the air side to relieve pressure, thereby adjusting the air pressure in the pressure tank to change the water capacity in the test bench; The capacity unit also includes a pressure transmitter and a weighing sensor; the pressure transmitter is used to detect the air pressure on the air side; the weighing sensor is located in the pressure tank and is used to detect the weight of the pressure tank. The control unit is electrically connected to the inflation valve, the deflation valve and the weighing sensor respectively, and is also used to determine the water volume in the test bench based on the detection value of the weighing sensor.

3. The multifunctional hydraulic water quality testing platform according to claim 1, characterized in that, The constant pressure water supply unit includes a constant pressure water supply device; the constant pressure water supply device is connected to the circulation pipeline and supplies water to the circulation pipeline to stabilize the pressure in the circulation pipeline at a set pressure. The control unit is electrically connected to the constant pressure water supply device and is used to control the operation of the constant pressure water supply device.

4. The multifunctional hydraulic and water quality testing platform according to claim 1, characterized in that, The water pump is a variable frequency water pump, and / or the circulation pipeline is equipped with a flow regulating valve for regulating the circulation flow.

5. The multifunctional hydraulic and water quality testing platform according to claim 1, characterized in that, The gas accumulation simulation unit includes an injection pipeline, an injection valve, and an exhaust valve; the injection valve is installed on the injection pipeline and is electrically connected to the control unit; the injection pipeline is connected to an external gas source and injects gas into the circulation pipeline through the injection valve; the exhaust valve is located at a high point in the circulation pipeline to discharge the gas in the circulation pipeline. The gas injection pipeline is also equipped with a check valve and a ball valve; the check valve allows gas to flow from the external gas source to the circulation pipeline and prevents water in the circulation pipeline from flowing back to the external gas source; the ball valve is used to open and close the gas injection pipeline.

6. The multifunctional hydraulic and water quality testing platform according to claim 1, characterized in that, The water loss simulation unit includes a drainage pipe connected to the circulation pipeline, and a regulating valve and a drain valve installed on the drainage pipe; the regulating valve and the drain valve are electrically connected to the control unit respectively; the regulating valve is used to cause the test bench to lose water slowly by adjusting the opening degree, and the drain valve is used to cause the test bench to lose water quickly by opening and closing.

7. The multifunctional hydraulic and water quality testing platform according to claim 1, characterized in that, The water hammer simulation unit includes at least two solenoid valves with different diameters connected to the circulation pipeline. The solenoid valves are electrically connected to the control unit. Under the control of the control unit, the at least two solenoid valves open and close rapidly to generate a water hammer effect.

8. The multifunctional hydraulic water quality testing platform according to claim 1, characterized in that, The circulation pipeline is equipped with a feeding port for adding impurities into the circulation pipeline; The circulation pipeline is also equipped with a filtration assembly, which includes a dirt separator and a filter, as well as a bypass valve group. The bypass valve group is configured to allow water to flow through or bypass the dirt separator. Pressure detection elements are respectively provided on the upstream and downstream sides of the dirt separator for detecting the pressure loss of the dirt separator.

9. The multifunctional hydraulic and water quality testing platform according to claim 1, characterized in that, It also includes a status observation mechanism, which includes an observation window and a water quality detection device located in the circulation pipeline; the observation window is used to observe the status of the water in the circulation pipeline, and the water quality detection device is used to detect the water quality indicators of the water.

10. A water system testing method, implemented using a multifunctional hydraulic and water quality testing bench as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Step S10: Start the water pump to circulate the water in the circulation pipeline and adjust the circulation flow rate; Step S20: Based on the operating conditions to be simulated, the control unit controls at least one simulation unit in the operating condition simulation mechanism to simulate the corresponding operating conditions in the circulation pipeline. Step S30: Use the control unit to collect the operating parameters of the circulation pipeline and record the change curve of the operating parameters.

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