A functional experiment device for a hydrogen-cooled system liquid level control oil tank of a generator

Abstract

This invention discloses a functional experimental device for a liquid level control tank in a generator hydrogen cooling system, comprising: a base; a test tank mounted on the base; a filling and draining assembly, one end of which is connected to the return port and outlet port of the test tank, and the other end of which is connected to the oil inlet and outlet port of the liquid level control tank; an inert gas cylinder detachably mounted on the base; a gas pipe assembly, one end of which is connected to the outlet port of the inert gas cylinder, and the other end of which is connected to the inlet port of the liquid level control tank; a monitoring component disposed on the test tank and the filling and draining assembly to collect their operating status data; and a control module mounted on the outside of the base and electrically connected to the filling and draining assembly, the gas pipe assembly, and the monitoring component, and configured to execute a predetermined test program, automatically control the start, stop, and adjustment of the filling and draining assembly and the gas pipe assembly based on the operating status data, and collect feedback signals from the monitoring component. This invention enables automated functional testing and quantitative judgment standards for the liquid level control tank.

Description

Technical Field

[0001] This invention relates to the field of nuclear power equipment maintenance technology, and in particular to a functional experimental device for a generator hydrogen cooling system liquid level control tank. Background Technology

[0002] Functional tests are frequently performed on the hydrogen cooling system level control tanks of nuclear power plant generators during full inspections, level adjustments, and major overhauls following routine level fluctuations. Currently, industry practices utilize traditional methods for these tests, as detailed below: (1) After controlling the oil tank to drain, remove the oil tank filling and drain valve pipelines and the drain valve forced shut-off valve. Install a self-made test oil draining tool at the oil tank filling and drain pipe flanges, and install a self-made oil filling and nitrogen filling tool at the oil tank drain forced shut-off valve flange. (2) Insert the hand oil pump into the temporary oil tank and connect the hand oil pump outlet to the oil tank self-made tool interface with a temporary hose; connect the nitrogen cylinder outlet to the oil tank nitrogen filling tool with a hose. (3) Place a plastic bucket under the test oil draining tool to collect the oil. Put the hand oil pump in the bucket and connect the outlet to the oil tank with a temporary hose. Due to the limited space on site, only a small oil tank can be placed. During the test, the oil needs to be continuously pumped away. Moreover, the oil draining is pressurized and will cause oil splashing. It is necessary to temporarily cover the top of the oil tank with a plastic sheet. (4) Use the hand oil pump to fill the oil tank to +100mm liquid level (filling amount is about 300kg) and then close the oil filling valve; turn on the nitrogen to pressurize the oil tank to 0.5MPa and then start the functional test. (5) First, open the drain valve to continuously drain oil and visually observe the changes in the drained oil to determine the test results; after passing the test, conduct the replenishment valve drain test, and the judgment standard is to visually judge the changes in oil flow. (6) If the test is qualified, remove the above-mentioned test tools and restore the pipeline; if the test is unqualified, drain the oil from the tank and adjust the position of the float valve, and then repeat the above procedures to test again. According to the current overhaul statistics, the average number of tests required for each overhaul to pass is 3.

[0003] The above-mentioned test process shows that the original test method has the following shortcomings: (1) The method is traditional and the judgment criteria are not quantified, requiring visual judgment of the qualified status. (2) The preparation cycle is long, requiring the handling of oil drums and nitrogen cylinders and the installation of connecting pipes during the preparation stage. (3) The time window for pipe diameter and path is tight. The fastest test under the current method takes about 5 hours, and the test can only be started about 3 days after the previous maintenance work is completed, which poses a risk of exceeding the time limit. (4) The safety risk is high. The test pressure and oil filling and draining pipes are all temporary hoses, which pose a risk of injury from detachment and oil leakage. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a functional experimental device for the liquid level control tank of a generator hydrogen cooling system.

[0005] The technical solution adopted by the present invention to solve its technical problem is: to construct a functional experimental device for a generator hydrogen cooling system liquid level control oil tank, including: a base to provide an installation foundation; A test oil tank, mounted on the base, provides test oil; The filling and draining oil assembly is placed on the test oil tank. One end of the assembly is connected to the return oil port and the outlet oil port of the test oil tank, respectively, and the other end is used to connect the oil inlet and the oil outlet of the liquid level control oil tank. An inert gas cylinder, directly or indirectly detachably mounted on the base, provides inert gas for testing; The air tube assembly has one end connected to the outlet of the inert gas cylinder and the other end connected to the inlet of the liquid level control oil tank. A monitoring component is installed on the test oil tank and the filling and draining oil assembly to collect the operating status data of the test oil tank and the filling and draining oil assembly; The control module is directly or indirectly installed on the base and electrically connected to the oil filling and draining assembly, the air pipe assembly and the monitoring assembly, respectively. It is configured to execute a predetermined test program, automatically control the start, stop and adjust of the oil filling and draining assembly and the air pipe assembly according to the operating status data, and collect feedback signals from the monitoring assembly to complete the automated function test of the liquid level control tank.

[0006] Furthermore, the oil filling and draining assembly includes: An oil pump, connected to the test oil tank, provides the power for filling the oil tank; An oil filling pipe, one end of which is connected to the oil pump, and the other end of which is used to connect to the oil inlet of the level control oil tank to provide an oil filling path; An oil drain pipe is provided, with one end connected to the return port of the test oil tank and the other end connected to the oil outlet of the level control oil tank to provide a return path. A pressure regulating valve is located at the outlet end of the oil pump to regulate the oil outlet pressure; The oil pump is electrically connected to the control module, and the control module executes the predetermined test program, which includes at least the following: a. Set the oil pump to automatically fill the liquid level control tank with oil.

[0007] Furthermore, the oil filling and discharging assembly also includes a manifold fitting, an overflow valve, a manifold pressure gauge, and a quick-connect fitting for connecting the oil filling pipeline, wherein the overflow valve, the manifold pressure gauge, and the quick-connect fitting are respectively connected to the manifold fitting; The oil pump is provided with at least two units, and the outlets of the at least two oil pumps converge at the manifold. The pressure regulating valve is provided on the manifold to regulate the overall oil outlet pressure.

[0008] Furthermore, the monitoring components include at least an electromagnetic flow meter, an electronic pressure gauge, and an electromagnetic level gauge. The electromagnetic flow meter and the electronic pressure gauge are both installed on the oil discharge pipe, and the electromagnetic level gauge is installed on the test oil tank. The electromagnetic flow meter, the electronic pressure gauge, and the electromagnetic level gauge are all electrically connected to the control module. The control module executes the predetermined test program, which includes at least the following: c. The pressure and flow signals fed back by the electromagnetic flowmeter and the electronic pressure gauge are automatically plotted as curves, and the opening time of the drain valve of the liquid level control tank is calculated based on the curves.

[0009] Furthermore, the monitoring component also includes a sight glass, which is disposed on the oil drain pipe for visual observation.

[0010] Furthermore, the gas tube assembly includes a gas delivery tube, a three-way valve, and a solenoid valve electrically connected to the control module. The gas delivery tube is equipped with a pressure reducing valve, and the solenoid valve is installed on the section of the gas delivery tube closest to the inert gas cylinder. The end of the gas delivery tube furthest from the inert gas cylinder is connected to the three-way valve via a quick connector. The air pipe assembly also includes a universal connector for selectively connecting the air inlet of the level control oil tank and the oil inlet of the level control oil tank, and the tee pipe is also connected to the oil filling pipe and the universal connector respectively. The control module executes the predetermined test program, which includes at least the following: b. Set the solenoid valve on the gas pipeline to automatically shut off.

[0011] Furthermore, the oil filling pipe is made of metal braided hose, and / or the oil drain pipe is made of a combination of transparent rubber hose and 316 stainless steel pipe.

[0012] Furthermore, the test oil tank includes a tank body, a heater, and a breather. The breather is installed on the upper part of the tank body to ensure that the air pressure inside the tank body is the same as that of the atmosphere. The heater is installed in the lower middle part of the tank body to heat the test oil.

[0013] Furthermore, the base includes a mounting base plate, a gas cylinder fixing component, a mounting frame, and multiple pulleys. The mounting base plate is used to place the test oil tank, and the multiple pulleys are located on the lower part of the mounting base plate to enable movement. The gas cylinder fixing component is directly or indirectly fixed to the mounting base plate for the installation of the inert gas cylinder. The mounting frame is directly or indirectly fixed to the mounting base plate for the installation of the control module.

[0014] Furthermore, it also includes at least one coil box, installed on the base, for storing the pipes of the oil filling and draining assembly and the pipes of the gas pipe assembly.

[0015] By implementing this invention, the following beneficial effects are achieved: The present invention relates to a functional experimental device for a generator hydrogen cooling system liquid level control tank. This device integrates a test tank, a filling and draining assembly, an inert gas cylinder, a gas pipe assembly, and a control module onto a single base. The control module enables automatic completion of the entire testing process, including oil replenishment, pressurization, and draining. A monitoring assembly tracks the operating status data of the test tank and the filling and draining assembly, acquiring quantitative data that can ultimately form standardized judgment criteria. This reduces the time and manpower required for pipe routing. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a three-dimensional structural schematic diagram of a functional experimental device for a generator hydrogen cooling system liquid level control oil tank according to an embodiment of the present invention; Figure 2 yes Figure 1 A top view of the functional experimental device for the hydrogen cooling system liquid level control tank of the generator; Figure 3 yes Figure 1 The flowchart of the functional experimental device for the liquid level control oil tank of the generator hydrogen cooling system. Detailed Implementation

[0017] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0018] In the description of the invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] See Figures 1 to 3 An embodiment of the present invention discloses a functional experimental device 100 for a generator hydrogen cooling system liquid level control tank, including a base 1, a test tank 2, an oil filling and draining assembly 3, an inert gas cylinder 4, a gas pipe assembly, a monitoring assembly, and a control module 7.

[0021] The base 1 provides the mounting foundation. The test oil tank 2 is mounted on the base 1 and provides the test oil. The filling and draining oil assembly 3 is placed on the test oil tank 2, with one end connected to the return port and outlet port of the test oil tank 2, and the other end connected to the oil inlet and outlet of the level control oil tank 200. An inert gas cylinder 4 is detachably mounted directly or indirectly on the base 1 to provide inert gas for testing. One end of the gas pipe assembly is connected to the outlet port of the inert gas cylinder 4, and the other end is connected to the inlet port of the level control oil tank 200. A monitoring assembly is installed on the test oil tank 2 and the filling and draining oil assembly 3 to collect operational status data of the test oil tank 2 and the filling and draining oil assembly 3. The control module 7 is directly or indirectly mounted on the base 1 and electrically connected to the oil filling / draining assembly 3, the gas pipe assembly, and the monitoring assembly, respectively. It is configured to execute a predetermined test program, automatically control the start / stop and adjustment of the oil filling / draining assembly 3 and the gas pipe assembly based on operating status data, and collect feedback signals from the monitoring assembly to complete the automated functional test of the level control tank 200. Optionally, the inert gas cylinder 4 is a nitrogen cylinder used to provide nitrogen for experiments.

[0022] The functional experimental device 100 for the liquid level control tank of the generator hydrogen cooling system of the present invention integrates the test oil tank 2, the oil filling and draining assembly 3, the inert gas cylinder 4, the gas pipe assembly, and the control module 7 on a base 1, and realizes the automatic completion of the entire process of oil replenishment, pressurization, and oil draining through the control module 7. It can solve the problems of transporting oil drums, nitrogen cylinders, and installing connecting pipes in the preparation stage of the prior art, reduce the time and manpower input of pipe diameter path, and avoid the risk of exceeding the construction period. The monitoring component is set to monitor the flow and pressure of the oil filling and draining assembly 3, obtain quantitative data, and finally form a standardized judgment standard. It can solve the problem of traditional methods where the judgment standard is not quantitative and requires visual judgment of the qualified state.

[0023] Furthermore, such as Figure 1As shown, in some embodiments, the base 1 includes a mounting plate 11, a gas cylinder fixing component, a mounting frame 13, and multiple pulleys 14. The mounting plate 11 is used to place the test oil tank 2, and the multiple pulleys 14 are located on the lower part of the mounting plate 11 to enable movement. The gas cylinder fixing component is directly or indirectly fixed to the mounting plate 11 for mounting the inert gas cylinder 4. The mounting frame 13 is directly or indirectly fixed to the mounting plate 11 for mounting the control module 7. Optionally, four pulleys 14 are provided, which can be non-pneumatic pulleys 14, installed at the four corners of the bottom of the mounting plate 11 to enable movement. The test oil tank 2 is mounted on the mounting plate 11. The gas cylinder fixing component can be directly mounted on the mounting plate 11 or mounted on the side of the test oil tank 2 to indirectly mount it on the mounting plate 11. The inert gas cylinder 4 is detachably mounted via the gas cylinder fixing component, and the number of inert gas cylinders 4 corresponds one-to-one with the number of gas cylinder fixing components. Similarly, mounting bracket 13 can be directly mounted on mounting base plate 11, or it can be mounted on the side of test oil tank 2 for indirect mounting on mounting base plate 11. Control module 7 can be detachably mounted via mounting bracket 13. Optionally, the gas cylinder fixing component can be simultaneously connected and fixed to mounting base plate 11 and to the side of test oil tank 2 to increase stability. The same applies to mounting bracket 13. Understandably, the gas cylinder fixing component only needs to allow for detachable mounting of inert gas cylinder 4, and is not limited to a specific structural form. The same applies to mounting bracket 13.

[0024] Furthermore, such as Figure 2 As shown, in some embodiments, the test oil tank 2 is used to store, collect, and supply test oil (hereinafter referred to as test oil). The test oil tank 2 may include a tank body 21, a heater, and a breather 22. The breather 22 is installed on the upper part of the tank body 21 to ensure that the air pressure inside the tank body 21 is the same as that of the atmosphere. The heater is installed in the lower middle part of the tank body 21 to heat the test oil. The tank body 21 may be made of 316 stainless steel and has a volume of approximately 1.0 m³. An electromagnetic level gauge 63 is installed on the tank body 21 for real-time monitoring and recording of liquid level data. The electromagnetic level gauge 63 can be connected to the control module 7 to upload liquid level data. The heater is located inside the oil tank and is not shown in the figure.

[0025] Furthermore, such as Figures 1 to 3 As shown, in some embodiments, the oil filling and discharging assembly 3 includes an oil pump 31, an oil filling pipe 32, an oil discharging pipe 33, and a pressure regulating valve 34. The oil pump 31 is connected to the test oil tank 2 to provide oil filling power. One end of the oil filling pipe 32 is connected to the oil pump 31, and the other end is connected to the oil inlet of the level control oil tank 200 to provide an oil filling path. One end of the oil discharging pipe 33 is connected to the return port of the test oil tank 2, and the other end is connected to the oil outlet of the level control oil tank 200 to provide a return path. The pressure regulating valve 34 is located at the outlet end of the oil pump 31 to regulate the oil outlet pressure. The oil pump 31 is electrically connected to the control module 7, and the control module 7 controls the start and stop of the oil pump 31 and the pressure regulation of the pressure regulating valve 34.

[0026] Optionally, the oil pump 31 can be mounted on a bell-shaped shroud, which is installed on the oil tank. This ensures that the oil pump 31 can reliably draw oil under any operating condition, preventing air from entering and thus protecting the oil pump 31 and ensuring stable system operation. The oil pump 31 has a flow rate of 20L / min-25L / min, a rated pressure of 0.5MPa, and a motor voltage of 380V. The type of oil pump 31 is not limited; a simple-to-maintain, reliable, and mature product is sufficient. The oil filling pipe 32 can be a metal braided flexible hose with a diameter of 20mm-32mm and a pressure rating of 0.5MPa. The oil filling pipe 32 is equipped with an oil filling valve 321, which is electrically connected to the control module 7. The oil drain pipe 33 can be a combination of a transparent rubber hose and a 316 stainless steel pipe. The length of the stainless steel pipe is determined based on the ease of installation of the monitoring components. The oil drain pipe 33 is equipped with an oil drain valve 331, which is electrically connected to the control module 7. This improves pipeline safety and reduces the risk of pipeline detachment causing injury or oil spillage. Two oil drain pipes 33 can be provided, which are respectively connected to the two oil outlets of the liquid level control oil tank 200.

[0027] Furthermore, such as Figure 2 As shown, in some embodiments, the oil filling and draining assembly 3 further includes a manifold 35, an overflow valve 36, a manifold pressure gauge 37, and a quick-connect fitting 38 for connecting the oil filling pipeline 32. The overflow valve 36, manifold pressure gauge 37, and quick-connect fitting 38 are respectively connected to the manifold 35. Two or more oil pumps 31 are provided, and the outlets of all oil pumps 31 converge at the manifold 35. A pressure regulating valve 34 is located on the manifold 35 to regulate the overall oil outlet pressure. The manifold 35 is used to realize the convergence of oil circuits, pressure regulation, safety protection, and standardized interface integration. The manifold 35 is a manifold block, i.e., a solid metal block with complex internal connecting oil channels that internally connect the pump ports of multiple oil pumps 31. The manifold 35 greatly simplifies the external pipeline, replacing the large number of easily leaking and space-consuming external steel pipes and fittings in the prior art with a compact internal connecting oil channel.

[0028] Specifically, two oil pumps 31 are installed side-by-side on the upper part of the oil tank. The outlets of the two oil pumps 31 converge at a manifold block, on which a pressure regulating valve 34 is installed to ensure that the pressure is regulated within the range of 0.1MPa-0.5MPa. A main pipe relief valve 36 is installed on the manifold block, with a working pressure of 0.5MPa. At the same time, quick-connect fittings 38 with a diameter of 20mm-32mm are installed on the manifold block, and a pressure gauge with a maximum range of 0.6MPa is installed.

[0029] Furthermore, such as Figure 2 and Figure 3As shown, in some embodiments, the monitoring components include an electromagnetic flowmeter 61, an electronic pressure gauge 62, and an electromagnetic level gauge 63. The electromagnetic flowmeter 61 and electronic pressure gauge 62 are both installed on the oil discharge pipe 33, and the electromagnetic level gauge 63 is installed on the test oil tank 2. The electromagnetic flowmeter 61, electronic pressure gauge 62, and electromagnetic level gauge 63 are all electrically connected to the control module 7. The electromagnetic flowmeter 61 is used to monitor the test oil discharge flow rate from the oil discharge pipe 33 in real time. The electronic pressure gauge 62 is used to monitor the test oil pressure discharged from the oil discharge pipe 33 in real time. The electromagnetic level gauge 63 is used to monitor the test oil level in the test oil tank 2 in real time. All monitored data is transmitted to the control module 7. The control module 7 executes a predetermined test program based on this data and can ultimately be used for diagnosing the status of the oil discharge valve of the level control oil tank 200. See the following text for details on how it operates.

[0030] Furthermore, in some embodiments, the monitoring component also includes a sight glass, which is disposed on the oil drain pipe 33 for visual observation. Optionally, the sight glass is a glass sight glass, required to clearly show the changes in the oil flow state of the test oil in the pipe, for preliminary judgment of the test results. The sight glass is not shown in the diagram.

[0031] Furthermore, in some embodiments, the functional experimental device 100 for the generator hydrogen cooling system level control tank also includes a universal connector for selectively connecting the air inlet and the oil inlet of the level control tank 200. The air pipe assembly and the oil filling pipe 32 are respectively connected to the universal connector. Preferably, the air pipe assembly and the oil filling pipe 32 are respectively connected to the universal connector via quick connectors. The universal connector and quick connector are not shown in the figure.

[0032] Furthermore, such as Figure 3 As shown, in some embodiments, the gas tubing assembly includes a gas supply pipe 51, a tee pipe 52, and a solenoid valve 53 electrically connected to the control module 7. The gas supply pipe 51 is equipped with a pressure reducing valve, and the solenoid valve 53 is installed on the section of the gas supply pipe 51 closest to the inert gas cylinder 4. The end of the gas supply pipe 51 furthest from the inert gas cylinder 4 is connected to the tee pipe 52 via a quick connector. The tee pipe 52 is also connected to an oil filling pipe 32 and a universal connector.

[0033] Specifically, the oil-filled pipe 32 is detachably connected to the first port of the tee pipe 52 via a quick connector, and the gas-transmitting pipe 51 is also detachably connected to the second port of the tee pipe 52 via a quick connector. The universal connector is detachably or fixedly connected to the third port of the tee pipe 52. An oil-filled valve 321 may be installed on the section of the oil-filled pipe 32 near the tee pipe 52, and a gas-transmitting valve 511 may be installed on the section of the gas-transmitting pipe 51 near the tee pipe 52. The oil-filled valve 321 and the gas-transmitting valve 511 can be selected to be in manual or electric mode, allowing one of them to be opened to prevent the oil and gas media from mixing or flowing between each other in the pipeline, thereby avoiding operational errors and equipment contamination.

[0034] Furthermore, such as Figure 1 and Figure 2 As shown, the functional experimental device 100 for the generator hydrogen cooling system liquid level control tank also includes at least one coil box 8, installed on the base 1, for storing the pipes of the oil filling and draining assembly 3 and the gas pipe assembly. For example, one coil box 8 can be set up to coil the oil filling pipe 32, the oil draining pipe 33, and the gas supply pipe 51 together inside the coil box 8. Alternatively, two coil boxes 8 can be set up, with the oil filling pipe 32 and the gas supply pipe 51 coiled together in one coil box 8, and the oil draining pipe 33 coiled in the other coil box 8, which is easier to organize. The specific configuration can be determined according to actual needs.

[0035] Furthermore, such as Figure 3 As shown, in some embodiments, the control module 7 adopts a PLC mode, and the control module 7 executing a predetermined test program may include the following: a. Set the oil pump 31 to automatically fill the level control oil tank 200 with oil.

[0036] b. Set the solenoid valve 53 on the gas supply pipe 51 to automatically shut off.

[0037] c. The pressure and flow signals fed back by the flow meter and pressure gauge are automatically plotted as curves, and the opening time of the drain valve of the liquid level control oil tank 200 is calculated based on the curves.

[0038] During the functional test of the generator hydrogen cooling system level control tank 200, steps a, b, and c can be performed sequentially or in sequence. For example, the following is a complete experimental procedure (control module 7 executes the predetermined test program throughout): First, execute step a. Set the oil pump 31 to automatically fill the level control oil tank 200 with oil. Specifically, set the outlet pressure through the pressure regulating valve 34, open the oil filling valve 321 on the oil filling pipeline 32, and start the oil pump 31 to automatically fill the level control oil tank 200 with oil. After the oil filling is completed, automatically shut off the oil pump 31 and the oil filling valve 321. Before executing step a, manually establish the relevant connections between the universal connector and the drain pipeline 33 and the level control oil tank 200.

[0039] Then, proceed with step b. Setting the solenoid valve 53 on the gas supply pipe 51 to automatically shut off. Specifically, open the gas supply valve 511 and the solenoid valve 53 to charge the tank, pressurizing it to 0.5 MPa before starting the functional test. After the charging is complete, close the solenoid valve 53 and the gas supply valve 511.

[0040] Finally, step c. The pressure and flow signals fed back from the flow meter and pressure gauge are automatically plotted as curves, and the opening time of the drain valve of the level control oil tank 200 is calculated based on these curves. Specifically: After the functional test, the drain valve is opened to continuously drain oil. The change in the oil flow state of the test oil in the pipe is observed through the sight glass. Simultaneously, the pressure and flow signals fed back from the flow meter and pressure gauge are automatically plotted as curves, and the opening time of the drain valve of the level control oil tank 200 is calculated based on these curves.

[0041] If the test is passed, manually disconnect the universal connector and the relevant connections of the drain pipe 33. If the test fails, drain the oil from the level control tank 200, adjust the position of the float valve, and then repeat the above test procedure.

[0042] Optionally, the control module 7 can also be equipped with an audible and visual alarm function, which can provide operators with real-time warning information about system status and faults, ensuring the safety and efficiency of the test process.

[0043] By implementing this invention, the following beneficial effects are achieved: The functional experimental device 100 for the liquid level control tank of the generator hydrogen cooling system of the present invention integrates the test oil tank 2, the oil filling and draining assembly 3, the inert gas cylinder 4, the gas pipe assembly, and the control module 7 on a base 1, and realizes the automatic completion of the entire process of oil replenishment, pressurization, and oil draining through the control module 7. A monitoring component is set up to monitor the operating status data of the test oil tank 2 and the oil filling and draining assembly 3, obtain quantitative data, and finally form a standardized judgment standard. It can reduce the time and manpower input for pipe diameter path.

[0044] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those skilled in the art, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention. These all fall within the protection scope of the present invention. That is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A functional experimental device (100) for controlling the liquid level of a generator hydrogen cooling system oil tank, characterized in that, include: Base (1), providing a mounting foundation; Test oil tank (2), installed on the base (1), provides test oil; The filling and draining oil assembly (3) is placed on the test oil tank (2), with one end connected to the return oil port and the outlet oil port of the test oil tank (2) respectively, and the other end used to connect to the oil inlet and oil outlet of the liquid level control oil tank (200); An inert gas cylinder (4) is detachably mounted directly or indirectly on the base (1) to provide inert gas for testing; The air tube assembly is connected at one end to the outlet of the inert gas cylinder (4) and at the other end to the inlet of the liquid level control oil tank (200). A monitoring component is installed on the test oil tank (2) and the filling and draining oil assembly (3) to collect the operating status data of the test oil tank (2) and the filling and draining oil assembly (3); The control module (7) is directly or indirectly installed on the base (1) and electrically connected to the oil filling and draining assembly (3), the air pipe assembly and the monitoring assembly respectively. It is configured to execute a predetermined test program, automatically control the start-up, shutdown and adjustment of the oil filling and draining assembly (3) and the air pipe assembly according to the operating status data, and collect feedback signals from the monitoring assembly to complete the automated function test of the liquid level control tank (200).

2. The functional experimental device (100) for controlling the liquid level of the generator hydrogen cooling system according to claim 1, characterized in that, The oil filling and draining assembly (3) includes: An oil pump (31) is connected to the test oil tank (2) to provide oil filling power; An oil filling pipe (32) is connected at one end to the oil pump (31) and at the other end to the oil inlet of the level control tank (200) to provide an oil filling path; The drain pipe (33) has one end connected to the return port of the test oil tank (2) and the other end connected to the oil outlet of the level control oil tank (200) to provide a return path; A pressure regulating valve (34) is provided at the outlet end of the oil pump (31) to regulate the oil outlet pressure; The oil pump (31) is electrically connected to the control module (7), and the control module (7) executes the predetermined test program, which includes at least the following: a. Set the oil pump (31) to automatically fill the level control oil tank (200) with oil.

3. The functional experimental device (100) for controlling the liquid level of the generator hydrogen cooling system according to claim 2, characterized in that, The oil filling and draining assembly (3) also includes a manifold fitting (35), an overflow valve (36), a manifold pressure gauge (37), and a quick connector (38) for connecting the oil filling pipeline (32). The overflow valve (36), the manifold pressure gauge (37), and the quick connector (38) are respectively connected to the manifold fitting (35). At least two oil pumps (31) are provided, and the outlets of at least two oil pumps (31) converge at the manifold (35). The pressure regulating valve (34) is provided on the manifold (35) to regulate the overall oil outlet pressure.

4. The functional experimental device (100) for controlling the liquid level of the generator hydrogen cooling system according to claim 2, characterized in that, The monitoring components include an electromagnetic flow meter (61), an electronic pressure gauge (62), and an electromagnetic level gauge (63). The electromagnetic flow meter (61) and the electronic pressure gauge (62) are both installed on the oil discharge pipe (33), and the electromagnetic level gauge (63) is installed on the test oil tank (2). The electromagnetic flow meter (61), the electronic pressure gauge (62), and the electromagnetic level gauge (63) are all electrically connected to the control module (7). The control module (7) executes the predetermined test program, which includes at least the following: c. The pressure and flow signals fed back by the electromagnetic flowmeter (61) and the electronic pressure gauge (62) are automatically plotted as curves, and the opening time of the drain valve of the liquid level control tank (200) is calculated based on the curves.

5. The functional experimental device (100) for controlling the liquid level of the generator hydrogen cooling system according to claim 4, characterized in that, The monitoring component also includes a sight glass, which is mounted on the oil drain pipe (33) for visual observation.

6. The functional experimental device (100) for controlling the liquid level of the generator hydrogen cooling system according to claim 5, characterized in that, The gas pipe assembly includes a gas supply pipe (51), a three-way pipe (52), and a solenoid valve (53) electrically connected to the control module (7). The gas supply pipe (51) is equipped with a pressure reducing valve, and the solenoid valve (53) is installed on the section of the gas supply pipe (51) close to the inert gas cylinder (4). The end of the gas supply pipe (51) away from the inert gas cylinder (4) is connected to the three-way pipe (52) via a quick connector. The gas pipe assembly also includes a universal connector for selectively connecting the air inlet of the liquid level control oil tank (200) and the oil inlet of the liquid level control oil tank (200). The three-way pipe (52) is also connected to the oil filling pipe (32) and the universal connector respectively. The control module (7) executes the predetermined test program, which includes at least the following: b. Set the solenoid valve (53) on the gas supply pipe (51) to automatically shut off.

7. The functional experimental device (100) for controlling the liquid level of the generator hydrogen cooling system according to claim 2, characterized in that, The oil filling pipe (32) is made of metal braided hose, and / or the oil drain pipe (33) is made of a combination of transparent rubber hose and 316 stainless steel pipe.

8. The functional experimental device (100) for controlling the liquid level of the generator hydrogen cooling system according to claim 1, characterized in that, The test oil tank (2) includes a tank body (21), a heater and a breather (22). The breather (22) is installed on the upper part of the tank body (21) to ensure that the air pressure inside the tank body (21) is the same as that of the atmosphere. The heater is installed in the lower middle part of the tank body (21) to heat the test oil.

9. The functional experimental device (100) for controlling the liquid level of the generator hydrogen cooling system according to claim 1, characterized in that, The base (1) includes a mounting base plate (11), a gas cylinder fixing component, a mounting bracket (13), and multiple pulleys (14). The mounting base plate (11) is used to place the test oil tank (2), and the multiple pulleys (14) are located at the lower part of the mounting base plate (11) to enable movement. The gas cylinder fixing component is directly or indirectly fixed to the mounting base plate (11) for the installation of the inert gas cylinder (4). The mounting bracket (13) is directly or indirectly fixed to the mounting base plate (11) for the installation of the control module (7).

10. The functional experimental device (100) for controlling the liquid level of the generator hydrogen cooling system according to claim 1, characterized in that, It also includes at least one coil box (8) installed on the base (1) for storing the pipes of the filling and draining oil assembly (3) and the pipes of the gas assembly.

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