Float valve function verification method, device and equipment and storage medium

Abstract

The invention is suitable for the technical field of auxiliary equipment maintenance of a hydrogen-cooled generator set, and provides a method, a device and equipment for verifying the function of a floating ball valve and a storage medium, and the method comprises the following steps: on the premise that a generator set is in a non-power-generation operation state and preset hydrogen pressure is maintained in a generator, executing verification operation on a target floater oil tank; the verification operation comprises the following steps: isolating an oil discharge pipeline and an oil inlet pipeline of the target floater oil tank; the target floater oil tank is filled with oil to an initial liquid level higher than a preset closing liquid level of the floating ball valve; reopening the oil discharge pipeline; the liquid level change of the target floater oil tank is obtained; and the functional state of the floating ball valve is determined based on the liquid level change. According to the scheme, preventive verification can be realized, and equipment operation hidden dangers are avoided.

Description

Technical Field

[0001] This application belongs to the field of auxiliary equipment maintenance technology for hydrogen-cooled generator sets, and particularly relates to a method, device, equipment and storage medium for verifying the function of a float valve. Background Technology

[0002] Large steam turbine generators commonly use hydrogen as the cooling medium. To ensure that hydrogen does not leak from the gap between the rotor and the casing during operation and to prevent air from entering the generator, a sealing oil system is installed. This system supplies oil to the sealing tiles at both ends of the generator, forming an oil film to isolate the hydrogen. The sealing oil system mainly includes two oil circuits: one on the air side and one on the hydrogen side. The hydrogen-side return oil carries a large amount of hydrogen, which needs to be introduced into a float tank for gas separation.

[0003] The float tank is a key component in the hydrogen-side return oil circuit, and its core part is a float valve. The float valve automatically opens and closes according to changes in the liquid level in the tank. Its core functions are: when the liquid level is high, the float valve opens wide to accelerate oil discharge, preventing the liquid level in the tank from becoming too high due to poor return oil flow, which could lead to an increase in return oil back pressure, causing hydrogen-side oil to leak from the sealing tiles to the air side, or even causing serious accidents such as backflow of sealing oil into the generator (i.e., "generator oil ingress"); when the liquid level is low, the float valve closes slightly to maintain sufficient oil seal in the tank, preventing hydrogen from escaping in large quantities along the return oil line, which could cause a sudden drop in hydrogen pressure and a decrease in purity in the generator.

[0004] As a mechanical component, the float valve may experience jamming due to wear, corrosion, or foreign matter in the oil during long-term operation. Seals may also age and fail. If the float valve malfunctions, it will directly disrupt the balance of the sealing oil flow on the hydrogen side, posing a serious threat to the safe operation of the generator.

[0005] Currently, inspections of float valves are usually only carried out during the dismantling of the unit during major overhauls. This means that float valve failures are often only discovered when abnormal operating conditions have already occurred, lacking preventative verification methods and posing potential risks to equipment operation. Summary of the Invention

[0006] This application provides a method, apparatus, device, and storage medium for verifying the function of a float valve, in order to solve the problem of the lack of preventive verification methods in the prior art, which leads to potential equipment operation hazards.

[0007] The first aspect of this application provides a method for verifying the function of the float valve in the float tank of a generator sealing oil system, including: Under the premise that the unit is in non-power generation operation and the generator maintains a preset hydrogen pressure, a verification operation is performed on the target float tank; the verification operation includes: Isolate the drain line and inlet line of the target float tank; Fill the target float tank with oil to an initial level higher than the preset closing level of the float valve; Reopen the drain line; Obtain the liquid level change in the target float tank; The functional state of the float valve is determined based on the liquid level change.

[0008] A second aspect of this application provides a verification device for the function of the float valve in the float tank of a generator sealing oil system, comprising: The verification module is used to perform verification operations on the target float tank under the premise that the unit is in a non-power generation operation state and the generator maintains a preset hydrogen pressure; the verification operation includes: Isolate the drain line and inlet line of the target float tank; Fill the target float tank with oil to an initial level higher than the preset closing level of the float valve; Reopen the drain line; Obtain the liquid level change in the target float tank; The functional state of the float valve is determined based on the liquid level change.

[0009] A third aspect of this application provides a computer device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method described in the first aspect.

[0010] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method described in the first aspect.

[0011] The fifth aspect of this application provides a computer program product that, when run on a computer device, causes the computer device to perform the steps of the method described in the first aspect.

[0012] As can be seen from the above, in this embodiment of the application, under the premise that the generator unit is in a non-power generation operation state and the generator maintains a preset hydrogen pressure, a verification operation is performed on the target float oil tank. Specifically, the oil drain line and oil inlet line of the target float oil tank with abnormal function are isolated, oil is filled into the target float oil tank with abnormal function to an initial liquid level higher than the preset closing liquid level of the float valve, the abnormal function drain line is reopened, the liquid level change of the target float oil tank with abnormal function is obtained, and the functional state of the abnormal float valve is determined based on the abnormal liquid level change. The function of the float valve is verified without disassembling the generator unit, which is not limited to the inspection of the float valve during the overhaul of the unit. This improves the convenience and flexibility of float valve detection, enables preventive verification, and avoids potential equipment operation hazards. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This application provides a flowchart of a method for verifying the function of the float valve in the float tank of a generator sealing oil system. Figure 1 ; Figure 2 This application provides a flowchart of a method for verifying the function of the float valve in the float tank of a generator sealing oil system. Figure 2 ; Figure 3 This is a structural diagram of a verification device for the function of the float valve in the float tank of a generator sealing oil system, provided in an embodiment of this application. Figure 4 This is a structural diagram of a computer device provided in an embodiment of this application. Detailed Implementation

[0015] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0017] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0020] Nuclear power plant generators mostly use hydrogen for cooling, and the hydrogen cooling system for generators is built around the safe use of hydrogen as a highly efficient cooling medium.

[0021] To ensure effective cooling, a continuous pressure oil film needs to be established using the turbine generator sealing oil system to dynamically seal the hydrogen. The function of the turbine generator sealing oil system is to provide sealing oil at a certain pressure and flow rate to the sealing devices at both ends of the generator, automatically maintaining the pressure difference between the supplied sealing oil and the hydrogen inside the generator. This ensures the isolation of air and hydrogen during normal operation, preventing high-pressure hydrogen from leaking from the gap between the rotor and the generator casing, and preventing contamination of the hydrogen by air carried by the sealing oil. Simultaneously, it also removes heat generated by the sealing tiles during operation, reduces impurities in the sealing oil, and eliminates air and moisture from the sealing oil to ensure the purity of the hydrogen inside the generator.

[0022] The sealing oil system includes an inlet side and a return side. On the inlet side, the main sealing oil pump continuously supplies oil at a certain pressure and flow rate to the generator's sealing tiles. On the return side, after completing its sealing and cooling functions, the oil at the sealing tiles is divided into two return streams. The two return streams on the return side include air-side return oil and hydrogen-side return oil. The air-side return oil flows to the air-side oil tank, where it may contain air due to contact with air. The hydrogen-side return oil flows to the float oil tank, where it comes into direct contact with the hydrogen gas inside the generator, dissolving and carrying a large amount of hydrogen.

[0023] For hydrogen-side oil return, in order to avoid oil carrying a large number of air bubbles returning directly to the main oil tank, causing hydrogen to escape and resulting in waste and danger, it is necessary to provide a spacious and static space through the float oil tank, so that the hydrogen air bubbles in the oil can fully float up and separate, and be sent back to the generator through devices such as exhaust fans, thereby recovering hydrogen and ensuring that the return oil pipeline is unobstructed.

[0024] Taking the ALSTOM half-speed turbine generator sealing oil system as an example, the system mainly includes components such as a vacuum oil tank, a level control valve, a sealing oil pump, a differential pressure regulating valve, a float tank, and an oil fume purification device. The sealing oil is pressurized by the main oil pump, filtered, and then supplied to the sealing tiles. It then flows from the inside and outside to the sealing oil float tank and the expansion tank. The expansion tank is connected to the turbine lubrication, jacking, and turning gear systems to ensure that the medium in the sealing oil circuit meets the requirements.

[0025] The float tank is mainly used to receive the return oil from the hydrogen side of the generator, while separating the hydrogen from the oil, fully releasing the gas contained in the oil, and sending the treated oil to the expansion tank. During normal operation, one float tank is in use and one is on standby. The float valve in the tank controls the oil level in the float tank.

[0026] The float tank is equipped with a level sensor that records the tank's liquid level in real time. The level information measured by the sensor is fed back to the processing equipment in the nuclear power plant's main control room, allowing staff to remotely monitor the tank's liquid level and query historical liquid level operation records. If the liquid level is determined to be too high or too low based on the information, a high or low level alarm can be triggered, enabling timely intervention by operators.

[0027] In some float valve designs, the core component is a float, typically made of a material less dense than oil, allowing it to float on the oil surface. The float is connected to the valve via a connecting rod. When the oil level rises, the float rises, opening the valve via the connecting rod and allowing more oil to be discharged from the tank. When the oil level drops, the float falls, closing the valve and allowing oil to be replenished. Through this mechanism, the float valve maintains the oil level within a set range, preventing overflow or oil shortage.

[0028] However, during long-term operation, float valves may malfunction due to wear, corrosion, or foreign object jamming of mechanical components (such as the float and valve core), or aging or damage to seals, leading to oil level control failure. These malfunctions can have various negative impacts on the generator sealing system, specifically manifested in the following ways: Increased risk of hydrogen leakage: A malfunctioning float valve may cause abnormal oil levels in the tank, affecting the circulation of the sealing oil. When the oil level is too low, the sealing oil cannot effectively cover the sealing surface on the hydrogen side, leading to hydrogen leakage into the atmosphere. Hydrogen is a flammable and explosive gas; its leakage and mixing with air may form an explosive gas, seriously threatening the safe operation of the unit. Abnormal oil level can cause equipment damage: A stuck float valve may cause the oil level in the tank to be too high or too low. An excessively high oil level increases the circulation resistance of the sealing oil, affecting the stability of the sealing system; an excessively low oil level may cause the sealing oil pump to run dry, resulting in overheating or damage to the equipment. Furthermore, an abnormal oil level may also cause the sealing oil to deteriorate, further affecting the generator's cooling effect. System imbalance and protection device tripping: A float valve malfunction disrupts the balance of the sealing system, potentially causing fluctuations in sealing oil pressure and affecting the stable operation of the generator. In severe cases, the system protection device may trip upon detecting an abnormal signal, leading to unit shutdown and impacting the normal operation of the power system. Explosion Risk and Personnel Safety Threat: Hydrogen leaks not only threaten equipment safety but can also pose a serious threat to on-site personnel. When hydrogen mixes with air to a certain concentration, it may ignite upon contact with an open flame or electrical spark, causing casualties and equipment damage.

[0029] For large steam turbine generators, generator set disassembly refers to the process of breaking down this large and complex equipment into its main components or smaller units according to predetermined, standardized procedures and technical specifications, so as to carry out comprehensive inspection, maintenance, repair or replacement.

[0030] In some implementations, float valve function checks occur during unit overhauls, requiring disassembly of the unit and generator. The typical method involves opening the float tank end cover after system oil drainage and having maintenance personnel manually lift and lower the float valve stem to check for flexible operation. However, this method cannot confirm whether the float valve's functionality meets system requirements. Furthermore, during the unit's historical operation, there have been instances of float valves failing to close properly or becoming stuck, affecting normal unit operation. This also means that float valve malfunctions are often only discovered after abnormal operating conditions have occurred, lacking preventative verification methods and posing potential equipment malfunctions.

[0031] In some embodiments of this application, a functional verification method for a float valve will be designed based on the structural characteristics of the generator sealing oil system and the actual field conditions. This method can ensure the reliability of the equipment and improve the safety of unit operation.

[0032] To illustrate the technical solution described in this application, specific embodiments are provided below.

[0033] See Figure 1 , Figure 1 This application provides a flowchart of a method for verifying the function of the float valve in the float tank of a generator sealing oil system. Figure 1 .like Figure 1As shown, a method for verifying the function of the float valve in the float tank of a generator sealing oil system includes performing a verification operation on the target float tank under the premise that the generator unit is in a non-power generation operation state and a preset hydrogen pressure is maintained in the generator.

[0034] Optionally, the preset hydrogen pressure is approximately 3 bar.

[0035] Optionally, the unit being in a non-generating operation state includes: the state during a major overhaul window after the unit has been disconnected from the grid. The target float tank is a standby float tank or an operating float tank.

[0036] Unit disconnection refers to the physical disconnection of a power plant's generating units from the power grid, thus ceasing the transmission of electricity to the grid. As an electrical operation, unit disconnection essentially involves changing the electrical connection state, disconnecting the generating unit from the external power grid and placing it in a non-generating operating state. Unit disconnection is different from unit dismantling.

[0037] Functional verification of the float valve in the float tank can be performed in the early part of the overhaul window, without relying on the premise of generator disassembly during the overhaul window, thus leaving reasonable room for the maintenance of other components during the overhaul window.

[0038] Alternatively, the method described in this application can be implemented without being limited to the overhaul window; functional verification of the float valve can also be carried out at other times outside the overhaul window. The unit can be in a non-generating operation state when performing float valve functional verification.

[0039] The verification process includes: Step 101: Isolate the drain line and the inlet line of the target float tank.

[0040] Optionally, the downstream isolation valve of the float valve in the target float tank can be closed to isolate the oil drain line, and the upper oil inlet valve in the target float tank can be closed to isolate the oil inlet line.

[0041] Step 102: Fill the target float tank with oil to an initial level higher than the preset closing level of the float valve.

[0042] Step 103: Reopen the oil drain line.

[0043] Open the downstream isolation valve of the float valve in the target float tank to reopen the oil drain line.

[0044] Step 104: Obtain the liquid level change of the target float tank.

[0045] Step 105: Determine the functional state of the float valve based on the liquid level change.

[0046] Optionally, if the liquid level drops to a stable level and remains unchanged, the float valve is considered to be functioning normally; otherwise, it is abnormal.

[0047] Optionally, the liquid level change may include the liquid level dropping to a stable level and remaining unchanged, the liquid level failing to stabilize, the stable liquid level dropping to a value within a set range, or the stable liquid level dropping to a value outside the set range.

[0048] Optionally, the functional status of the float valve may include normal float valve function and abnormal float valve function.

[0049] In some alternative implementations, step 105, which determines the functional state of the float valve based on changes in liquid level, includes: If the liquid level drops to a stable level and remains unchanged, and the stable level is within the range of the empirical level, then the float valve is considered to be functioning normally.

[0050] Alternatively, if the liquid level drops to a stable level and remains unchanged, then according to the set number of test cycles, the step of isolating the oil drain line and oil inlet line of the target float tank is returned to be executed. If the liquid level drops to a stable level and remains unchanged in each of the set number of test cycles, and the stability of the stable liquid level meets the set requirements, then the float valve is determined to be functioning normally.

[0051] Alternatively, if the liquid level cannot be stabilized, or if the liquid level drops to a stable level and remains unchanged, and the stable level is not within the range of the empirical level, then the float valve is determined to be malfunctioning.

[0052] Optionally, the empirical liquid level range is 450 mm to 650 mm.

[0053] The above-described implementation process of this application involves performing a verification operation on the target float tank under the premise that the generator unit is in a non-power generation operation state and a preset hydrogen pressure is maintained inside the generator. Specifically, the oil drain line and oil inlet line of the target float tank with malfunction are isolated, oil is added to the target float tank with malfunction to an initial liquid level higher than the preset closing liquid level of the float valve, the malfunction drain line is reopened, and the liquid level change of the target float tank with malfunction is obtained. Based on the malfunction liquid level change, the functional state of the malfunction float valve is determined, realizing online verification of the function of the float valve in the target float tank with malfunction. It does not require disassembling the generator, improving the convenience and flexibility of float valve detection, enabling preventive verification, and avoiding potential equipment operation hazards.

[0054] In an optional implementation, with the unit in non-generating operation and a preset hydrogen pressure maintained in the generator, a verification operation is performed on the target float tank, including: With the unit in non-power generation operation and the generator maintaining a preset hydrogen pressure, the backup float tank and the operating float tank in the generator sealing oil system are used as the target float tanks in sequence for verification.

[0055] During the verification operation performed on either the spare float tank or any of the float tanks in operation, the other float tank is in normal operation to maintain the seal of the generator sealing oil system.

[0056] The above process can effectively realize online verification of the float valve function. It can verify the float valve function without being limited to the overhaul window or relying on generator disassembly, while the unit can still operate normally. This increases the flexibility of verification and processing, enables effective preventive verification, and reduces potential equipment operation hazards.

[0057] The above implementation process is illustrated below with an example.

[0058] In a specific application, after the generator set is disconnected and shut down, the hydrogen pressure inside the generator is maintained at approximately 3 bar, and the operation of the sealing oil system is carried out during the initial stage of a major overhaul. The system includes one operational float tank (001BA) and one standby float tank (002BA). The verification steps are as follows: Preparation: Confirm that you have control over the operation of the upper inlet valve of both float tanks, the downstream isolation valve of the float valve, and the drain valve. Confirm that the vent valve is closed.

[0059] Verify the float valve of the spare fuel tank (002BA): 1. Confirm that the upper oil inlet valve and the downstream isolation valve of the float valve of 002BA are open, and the oil drain valve is closed, so that it is in standby mode.

[0060] 2. Isolation: Close the downstream isolation valve and drain valve of the float valve of 002BA, and open the upper inlet valve.

[0061] 3. Fill with oil: Add oil to 002BA to raise its level to the initial level of approximately 650mm.

[0062] 4. Oil Discharge Test: Close the upper oil inlet valve, and then slowly open the downstream isolation valve of the float valve. At this time, the oil tank begins to discharge oil through the outlet controlled by the float valve.

[0063] 5. Observation and Judgment: Based on the oil tank level measured by the internal liquid level sensor of 002BA, a rapid drop in the liquid level can be monitored. Once the liquid level drops to a certain height (e.g., 500mm), it stops falling and remains stable. Record this stable liquid level. This phenomenon indicates that as the liquid level drops, the float valve gradually closes the valve core until it is completely closed at the stable liquid level, cutting off the oil drain passage. This shows that the float valve is sensitive, closes tightly, and functions normally. If the liquid level cannot drop steadily and continuously, or if the stable liquid level is far below the experienced liquid level range (e.g., 400mm-450mm), it indicates that the float valve is stuck in the open position or not closing tightly; if the liquid level does not drop at all, it indicates that the float valve is stuck in the closed position.

[0064] 6. Repeat verification: Repeat steps 2 to 5 once to confirm the stability of the function.

[0065] 7. Restore to standby: After verification, open the upper oil inlet valve and the downstream isolation valve of the float valve of 002BA, and close the oil drain valve to restore it to standby status.

[0066] Verification of the float valve in the fuel tank (001BA): 1. When the float valve of the fuel tank is being tested for functionality, it will be taken out of service, and the backup fuel tank (002BA) will be put into normal use after the function test is completed. At this time, it is confirmed that 002BA has been put into normal use and can be connected to the hydrogen side return oil to receive and process the sealing oil contaminated by hydrogen returning from the hydrogen side of the generator.

[0067] 2. Repeat steps 2 to 6 of the above verification procedure for the float valve of the backup oil tank (002BA) on 001BA to verify it.

[0068] 3. System recovery: After verification, open the upper oil inlet valve and the downstream isolation valve of the float valve of 001BA, and close the oil drain valve to restore it to the operating state; at the same time, the oil inlet valve of 002BA can be closed as needed to return it to the pure standby state.

[0069] Handling Abnormalities: If the verification result of any float valve is abnormal (liquid level cannot be stabilized or the stable value exceeds the standard range), it will be arranged for repair or replacement during this round of overhaul.

[0070] In some implementations, the order of verification can be reversed. The verification process is described above and will not be repeated here.

[0071] This application also provides different implementation methods for verifying the valve function of the float valve in a generator sealing oil system.

[0072] In this embodiment, after determining the functional state of the float valve based on the liquid level change in step 105, the abnormality resolution and further float valve functional state detection are carried out in the case of abnormal float valve function.

[0073] See Figure 2 , Figure 2 This application provides a flowchart of a method for verifying the function of a float valve in a generator sealing oil system. Figure 2 .like Figure 2 As shown, the method includes the following steps: Step 201: If the float valve malfunctions, set up a repair or replacement task for the float valve during the overhaul window.

[0074] Step 202: After the float valve has been repaired or replaced, isolate the float tank under test where the float valve is located and close its vent valve.

[0075] Step 203: Gas at a predetermined pressure is introduced into the test float tank through a temporary pressurization device to simulate the hydrogen environment inside the generator.

[0076] Optionally, the temporary pressurization device includes a compressed air source, a pressure reducing valve, and a pressure gauge.

[0077] Optionally, the pre-set pressure is approximately 3 bar.

[0078] Step 204: Obtain the liquid level change of the float tank under test after pressurization.

[0079] Step 205: Determine the functional state of the float valve based on the liquid level change.

[0080] In one optional implementation, determining the functional state of the float valve based on the liquid level change includes: If the liquid level drops and stabilizes at a stable level after pressurization, the float valve is considered to be functioning normally. Alternatively, if the float valve is determined to be functioning normally, and the liquid level drops and stabilizes at a stable level after each pressurization by repeatedly filling the float tank with gas at a predetermined pressure using a temporary pressurization device at least twice, and the stability of the stable liquid level in each pressurization meets the set requirements.

[0081] The above implementation process enables effective handling of abnormal float valve functions. For float valves that have been removed from the equipment and repaired, or brand new float valve spare parts, functional verification is performed before installation, realizing offline verification of the float valve spare parts' functions.

[0082] The following example illustrates the above implementation process. In a specific application, the verification steps are as follows: Preparation: Install the float valve to be tested into a clean float oil tank, which has been partially filled with sealing oil. Confirm that you have control over all relevant valves in the tank. Connect a temporary pressurization device to the tank's vent valve; this device includes a compressed air hose, a pressure reducing valve, an isolation valve, and a pressure gauge.

[0083] First test: 1. Record the initial liquid level in the oil tank (e.g., 200mm).

[0084] 2. Close the upper oil inlet valve, air vent valve, and drain valve of the oil tank.

[0085] 3. Slowly open the isolation valve of the compressed air line and precisely adjust the pressure to 3 bar using the pressure reducing valve.

[0086] 4. Slowly open the vent valve of the oil tank to allow compressed air to enter the upper space of the tank. Observe the level gauge. Due to the increased air pressure inside the tank, the oil surface will be compressed, causing the oil level to rise and press against the float. If the float valve is properly sealed, the liquid level will rise to a certain height (e.g., 550mm) and then remain stable. This stable liquid level is the closed position of the float valve under this test pressure. Record this liquid level value.

[0087] 5. Close the exhaust valve and compressed air isolation valve to release the pressure inside the chamber.

[0088] Repeated tests: 1. Open the upper oil inlet valve to add oil to the tank until it reaches the initial level.

[0089] 2. Close the upper oil inlet valve and exhaust valve, and readjust the compressed air pressure to 3 bar.

[0090] 3. Slowly open the vent valve, observe and record the stable liquid level again.

[0091] Result judgment: 1. If the liquid level is stable in both tests and the stable liquid level values ​​are basically the same (for example, both around 550mm), then the float valve is considered to be functioning normally, sealing well, and can be used for installation.

[0092] 2. If the liquid level cannot be stabilized in both tests (it continues to drop slowly), it indicates that the float valve is not closing tightly and there is internal leakage.

[0093] 3. If the liquid level does not move at all, the float valve may be stuck or the air supply may be blocked.

[0094] The above-described implementation process of this application uses an external air source for pressurization testing. Without disassembling the device, a predetermined pressure of gas is controlled to be filled into the float tank under test to simulate the hydrogen environment inside the generator, thereby inducing its action and verifying the function of the float valve.

[0095] See Figure 3 , Figure 3 This is a structural diagram of a verification device for the float valve function of a generator sealing oil system float tank provided in an embodiment of this application. For ease of explanation, only the parts related to the embodiment of this application are shown.

[0096] The verification device 300 for the function of the float valve in the float tank of the generator sealing oil system includes: Verification module 301 is used to perform verification operations on the target float tank under the premise that the unit is in a non-power generation operation state and the generator maintains a preset hydrogen pressure; the verification operation includes: Isolate the drain line and inlet line of the target float tank; Fill the target float tank with oil to an initial level higher than the preset closing level of the float valve; Reopen the drain line; Obtain the liquid level change in the target float tank; The functional state of the float valve is determined based on the liquid level change.

[0097] Optionally, the unit being in a non-power generation operation state includes the state during the overhaul window after the unit is disconnected from the grid.

[0098] Optionally, the verification module 301 is used for: Close the downstream isolation valve of the float valve in the target float tank to isolate the oil drain line, and close the upper oil inlet valve in the target float tank to isolate the oil inlet line; Open the downstream isolation valve of the float valve in the target float tank to reopen the oil drain line.

[0099] Optionally, the verification module 301 is used for: If the liquid level drops to a stable level and remains unchanged, and the stable level is within the range of the experienced liquid level, then the float valve is considered to be functioning normally; or, If the liquid level drops to a stable level and remains unchanged, then according to the set number of test cycles, the step of isolating the oil drain and oil inlet pipes of the target float tank is repeated. If, in each of the set number of test cycles, the liquid level drops to a stable level and remains unchanged, and the stability of the stable level meets the set requirements, then the float valve is deemed to be functioning normally; or... If the liquid level cannot be stabilized, or if the liquid level drops to a stable level and remains unchanged, and the stable level is not within the range of the empirical level, then the float valve is determined to be malfunctioning.

[0100] Optionally, the verification module 301 is used for: Under the premise that the unit is in a non-power generation operation state and the generator maintains a preset hydrogen pressure, the backup float oil tank and the float oil tank in operation in the generator sealing oil system are used as the target float oil tanks in sequence, and the verification operation is performed. During the verification operation performed on either the spare float tank or any of the float tanks in operation, the other float tank is in normal operation to maintain the seal of the generator sealing oil system.

[0101] Optionally, the verification module 301 is used for: If the float valve malfunctions, a repair or replacement task for the float valve will be set during the overhaul window. After the float valve has been repaired or replaced, isolate the float tank under test where the float valve is located and close its vent valve. A gas at a predetermined pressure is introduced into the float tank under test through a temporary pressurization device to simulate the hydrogen environment inside the generator. Obtain the liquid level change of the float tank under test after pressurization; The functional state of the float valve is determined based on the liquid level change.

[0102] Optionally, the verification module 301 is used for: If the liquid level drops and stabilizes at a stable level after pressurization, the float valve is considered to be functioning normally. Alternatively, if the float valve is determined to be functioning normally, and the liquid level drops and stabilizes at a stable level after each pressurization by repeatedly filling the float tank with gas at a predetermined pressure using a temporary pressurization device at least twice, and the stability of the stable liquid level in each pressurization meets the set requirements.

[0103] The verification device for the float valve function of the float tank of the generator sealing oil system provided in this application embodiment can realize each process of the above-described verification method for the float valve function of the float tank of the generator sealing oil system embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0104] Figure 4 This is a structural diagram of a computer device provided in an embodiment of this application. As shown in the figure, the computer device 4 of this embodiment includes: at least one processor 40 ( Figure 4 (Only one is shown in the diagram), memory 41, and computer program 42 stored in said memory 41 and executable on said at least one processor 40, which, when executed, implements the steps in any of the above method embodiments.

[0105] The computer device 4 may be a desktop computer, laptop, handheld computer, or cloud server, etc. The computer device 4 may include, but is not limited to, a processor 40 and a memory 41. Those skilled in the art will understand that... Figure 4 This is merely an example of computer device 4 and does not constitute a limitation on computer device 4. It may include more or fewer components than shown, or combine certain components, or different components. For example, the computer device may also include input / output devices, network access devices, buses, etc.

[0106] The processor 40 can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0107] The memory 41 can be an internal storage unit of the computer device 4, such as a hard disk or memory of the computer device 4. The memory 41 can also be an external storage device of the computer device 4, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the computer device 4. Furthermore, the memory 41 can include both internal and external storage units of the computer device 4. The memory 41 is used to store the computer program and other programs and data required by the computer device. The memory 41 can also be used to temporarily store data that has been output or will be output.

[0108] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0109] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0110] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0111] In the embodiments provided in this application, it should be understood that the disclosed apparatus / computer devices and methods can be implemented in other ways. For example, the apparatus / computer device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings or direct couplings or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0112] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0113] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0114] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0115] The methods described in this application can be implemented in whole or in part by a computer program product. When the computer program product is run on a computer device, the computer device executes the steps in the various method embodiments described above.

[0116] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method of verifying the function of a float ball valve of a generator seal oil system float tank, characterized by, The method comprises: performing a verification operation on a target float tank under the condition that the unit is in a non-power generation operation state and a preset hydrogen pressure is maintained in the generator; the verification operation comprises: isolating the oil discharge pipeline and the oil inlet pipeline of the target float tank; filling oil into the target float tank to an initial liquid level higher than the preset closing liquid level of the float ball valve; reopening the oil discharge pipeline; obtaining the liquid level change of the target float tank; determining the functional state of the float ball valve based on the liquid level change.

2. The method of claim 1, wherein, The unit in a non-power generation operation state comprises: the unit in a state during a major repair window after being tripped.

3. The method of claim 1, wherein, The isolation of the oil discharge pipeline and the oil inlet pipeline of the target float tank comprises: closing the isolation valve downstream of the float ball valve in the target float tank to isolate the oil discharge pipeline, and closing the upper oil inlet valve in the target float tank to isolate the oil inlet pipeline; The reopening of the oil discharge pipeline comprises: opening the isolation valve downstream of the float ball valve in the target float tank to reopen the oil discharge pipeline.

4. The method of claim 1, wherein, The determination of the functional state of the float ball valve based on the liquid level change comprises: if the liquid level remains unchanged after falling to a stable liquid level, and the stable liquid level is within an experienced liquid level range, it is determined that the float ball valve is functional; or if the liquid level remains unchanged after falling to a stable liquid level, and the stability of the stable liquid level meets a set requirement, it is determined that the float ball valve is functional; or if the liquid level cannot be stabilized, or if the liquid level remains unchanged after falling to a stable liquid level and the stable liquid level is not within the experienced liquid level range, it is determined that the float ball valve is abnormal.

5. The method of claim 1, wherein, The verification operation on the target float tank under the condition that the unit is in a non-power generation operation state and a preset hydrogen pressure is maintained in the generator comprises: under the condition that the unit is in a non-power generation operation state and a preset hydrogen pressure is maintained in the generator, sequentially taking the standby float tank and the in-service float tank in the generator sealing oil system as the target float tank to perform the verification operation; wherein, during the performance of the verification operation on any one of the standby float tank and the in-service float tank, the other float tank is in a normal operation state to maintain the sealing of the generator sealing oil system.

6. The method of claim 1, wherein, After the determination of the functional state of the float ball valve based on the liquid level change, the method further comprises: if the float ball valve is abnormal, setting a maintenance or replacement task for the float ball valve during the major repair window; after the float ball valve has been maintained or replaced, isolating the float tank where the float ball valve is located and closing the exhaust valve thereof; filling a gas with a predetermined pressure into the float tank through a temporary pressure charging device to simulate a hydrogen environment in the generator; obtaining the liquid level change of the float tank after the pressure charging; determining the functional state of the float ball valve based on the liquid level change.

7. The method of claim 1, wherein, The determination of the functional state of the float ball valve based on the liquid level change comprises: If the liquid level drops after the pressurization and stabilizes at a stable liquid level, it is determined that the float valve is functioning normally. Alternatively, in the case of repeatedly pressurizing the float oil tank to a predetermined pressure at least twice through a temporary pressurizing device, if the liquid level drops after each pressurization and stabilizes at a stable liquid level, and the stability of the stable liquid level of each time meets the set requirement, it is determined that the float valve is functioning normally.

8. A device for verifying the function of a float ball valve of a generator seal oil system float tank, characterized by, The method comprises: The verification module is configured to perform a verification operation on the target float oil tank under the condition that the generator set is in a non-power generation operation state and a preset hydrogen pressure is maintained in the generator; the verification operation comprises: isolating the oil discharge pipeline and the oil inlet pipeline of the target float oil tank; pressurizing the target float oil tank to an initial liquid level higher than the preset closing liquid level of the float valve; reopening the oil discharge pipeline; obtaining the liquid level change of the target float oil tank; determining the functional state of the float valve based on the liquid level change.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 9. The computer program is executed by the processor to implement the steps of the method according to any one of claims 1 to 7.

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