A water inlet accident gate hydraulic system leakage prediction method and storage medium

Abstract

The present application relates to the technical field of intake accident gate hydraulic system detection, and more particularly to a kind of intake accident gate hydraulic system leakage prediction method, comprising: obtaining the time of adjacent three times intake accident gate is raised to full open position and setting serious fault alarm prediction time and slight abnormal alarm prediction time, based on the time of adjacent three times intake accident gate is raised to full open position, the first and second time intake accident gate lifting interval time and the second and third time intake accident gate lifting interval time are calculated, the first and second time intake accident gate lifting interval time and the second and third time intake accident gate lifting interval time are subtracted, the gate lifting interval time difference is obtained, the fourth gate full open time is calculated using the gate lifting interval time difference, whether the internal leakage of intake accident gate is normal is judged, and real-time detection of leakage in intake accident gate hydraulic system is accurately, effectively, simply and quickly completed.

Description

Technical Field

[0001] This invention relates to the field of detection technology for hydraulic systems of inlet emergency gates, and in particular to a method, device, equipment and storage medium for predicting leakage in hydraulic systems of inlet emergency gates. Background Technology

[0002] The hydraulic system of the intake emergency gate mainly consists of hydraulic cylinders, hydraulic cylinder frames, hydraulic pipelines, hydraulic pump stations, control valve groups, and local electrical control equipment. The hydraulic cylinder is an important actuator in the hydraulic transmission system. It drives the piston in the hydraulic cylinder to reciprocate through the action of hydraulic oil, so that the gate is maintained at a certain opening degree, thereby controlling the interruption or regulation of water flow. Once the hydraulic system fails, the gate will not be able to be raised to the set opening degree, affecting the normal operation of the generator.

[0003] Leakage is a common defect in the hydraulic system of the intake emergency gate. It can be divided into external and internal leakage. External leakage mainly refers to the leakage of hydraulic oil from the oil circulation system into the external environment, occurring at the sealing surfaces of hydraulic pipeline flanges, joints, hydraulic valve groups, hydraulic cylinders, and connection points. External leakage is readily observable and can be identified and addressed through routine inspections. However, internal leakage at the sealing surfaces of hydraulic cylinders cannot be statistically analyzed or observed, and its automation level is low. The main causes of internal leakage are failure of seals between the high and low pressure sides of the hydraulic system, causing hydraulic oil to flow from the high-pressure side to the low-pressure side within the system. Internal leakage is a very common and insidious defect in hydraulic systems. Because the leak point and amount cannot be directly observed, it is necessary to unilaterally introduce hydraulic oil into the hydraulic cylinder and observe whether there is any leakage at the return port when the piston rod stops at a certain end or point. When the internal leakage between the two chambers of the piston is small, visual observation and data collection would be time-consuming and labor-intensive, and the data would lack accuracy, leading to incorrect guidance in subsequent data analysis and processing. Therefore, this method is not an efficient or accurate diagnostic approach. Thus, an accurate, effective, simple, and rapid measure is needed to perform real-time detection of internal leakage in the hydraulic system of the inlet emergency gate. Summary of the Invention

[0004] The purpose of this invention is to provide a method for predicting leakage in the hydraulic system of an inlet emergency gate, so as to solve the problems of inaccurate leakage detection and lack of accurate data in existing gate hydraulic systems.

[0005] To solve the above-mentioned technical problems, the present invention provides a method for predicting leakage in the hydraulic system of an inlet emergency gate, comprising:

[0006] Obtain the time when the emergency gate at the inlet is raised to the fully open position for three consecutive water inlets and set the alarm prediction time for serious faults and the alarm prediction time for minor anomalies.

[0007] The interval between the first and second opening of the inlet emergency gate and the interval between the second and third opening of the inlet emergency gate are calculated based on the time taken for the three adjacent inlet emergency gates to be raised to the fully open position.

[0008] The difference between the first and second opening intervals of the inlet emergency gate and the second and third opening intervals of the inlet emergency gate is obtained as the gate opening interval difference value.

[0009] The time for the fourth gate to be fully opened is calculated using the time difference between the gate lifting intervals and the time intervals between the second and third lifting of the emergency gate at the inlet.

[0010] Based on the fourth full-opening time of the gate, the interval between the third and fourth gate openings of the inlet emergency gate is calculated. If the interval between the third and fourth gate openings of the inlet emergency gate is less than the predicted time of the serious fault alarm, it is determined that there is a serious fault in the internal leakage of the inlet emergency gate. If the interval between the third and fourth gate openings of the inlet emergency gate is greater than the predicted time of the serious fault alarm but less than the predicted time of the minor abnormality alarm, it is determined that there is a minor abnormality in the internal leakage of the inlet emergency gate. If the interval between the third and fourth gate openings of the inlet emergency gate is greater than the predicted time of the minor abnormality alarm, it is determined that the internal leakage of the inlet emergency gate is normal.

[0011] Preferably, the calculation of the interval between the first and second opening of the inlet emergency gate and the interval between the second and third opening of the inlet emergency gate based on the time taken for the three adjacent inlet emergency gates to be raised to the fully open position includes:

[0012] The interval between the first and second opening times of the inlet emergency gate is calculated based on the time taken for three consecutive inlet emergency gates to reach the fully open position. The calculation formula is as follows:

[0013]

[0014] in, This refers to the interval between the first and second opening of the emergency gate at the intake. The time when the emergency gate at the inlet is first raised to the fully open position. The time when the emergency gate at the inlet is raised to the fully open position for the second time;

[0015] The intervals between the first and second openings of the inlet emergency gate and the time taken for the third opening of the inlet emergency gate to reach the fully open position are calculated using the following formula:

[0016]

[0017] in, This refers to the interval between the second and third opening of the emergency gate at the intake. This refers to the time when the emergency gate at the inlet is raised to the fully open position for the third time.

[0018] Preferably, the formula for calculating the difference in gate lifting intervals by subtracting the intervals between the first and second lifting of the inlet emergency gate and the second and third lifting of the inlet emergency gate is as follows:

[0019]

[0020] in, This represents the time difference between the gate lifting intervals. This refers to the interval between the first and second opening of the emergency gate at the inlet.

[0021] Preferably, the formula for calculating the fourth full-opening time of the gate by using the time difference between the gate lifting intervals and the time intervals between the second and third lifting of the emergency gate at the inlet is as follows:

[0022]

[0023] in, This is the time for the fourth time the gates are fully opened. This refers to the time when the emergency gate at the inlet is raised to the fully open position for the third time.

[0024] Preferably, the step of determining that the internal leakage of the inlet emergency gate is normal if the interval between the 3rd and 4th opening of the inlet emergency gate is greater than the predicted time of the minor abnormality alarm includes:

[0025] If the interval between the 3rd and 4th lifting of the inlet emergency gate is longer than the interval between the 2nd and 3rd lifting of the inlet emergency gate, it is determined that the interval between the 3rd and 4th lifting of the inlet emergency gate is longer than the interval between the 2nd and 3rd lifting of the inlet emergency gate, and the internal leakage of the hydraulic system is reduced compared with the previous internal leakage.

[0026] If the interval between the 3rd and 4th lifting of the inlet emergency gate is less than the interval between the 2nd and 3rd lifting of the inlet emergency gate, it is determined that the interval between the 3rd and 4th lifting of the inlet emergency gate is shorter than the interval between the 2nd and 3rd lifting of the inlet emergency gate, and the internal leakage of the hydraulic system is greater than the previous internal leakage.

[0027] If the interval between the 3rd and 4th lifting of the inlet emergency gate is equal to the interval between the 2nd and 3rd lifting of the inlet emergency gate, it is determined that the interval between the 3rd and 4th lifting of the inlet emergency gate is consistent with the interval between the 2nd and 3rd lifting of the inlet emergency gate, and the internal leakage of the hydraulic system has not changed compared with the previous internal leakage.

[0028] Preferably, it further includes:

[0029] Obtain the opening value of the emergency gate at the inlet and the corresponding oil tank level height;

[0030] Based on the opening value and the corresponding tank level height, the total oil volume change value and the actual total oil volume change when the gate is fully open are calculated.

[0031] If the expected change in total oil volume is greater than the actual change in total oil volume when the gate is fully open, it is determined that there is an external leak in the gate hydraulic system; if the expected change in total oil volume is equal to the actual change in total oil volume when the gate is fully open, it is determined that there is no external leak in the gate hydraulic system; if the expected change in total oil volume is less than the actual change in total oil volume when the gate is fully open, it is determined that there is water ingress in the gate hydraulic system or an inlet accident, and the gate has a refueling operation in the return oil tank during the downward movement of the gate.

[0032] Preferably, the total oil volume change value calculated based on the opening value and the actual total oil volume change when the gate is fully open include:

[0033] The total change in oil volume is calculated using the gate opening values ​​during two consecutive automatic gate lifting events at the inlet and the gate opening values ​​when both inlet emergency gates are fully open. The calculation formula is as follows:

[0034]

[0035] in, This represents the change in total oil volume. This refers to the total amount of oil flowing into the rod chamber of the hydraulic cylinder during the first transition from the automatic door lifting position to the fully open position. The diameter of the rod in the rod-side chamber of the hydraulic cylinder for the inlet emergency gate. The inner diameter of the hydraulic cylinder. This refers to the opening degree of the gate during the first automatic opening of the emergency gate at the inlet. This is the opening value of the inlet emergency gate when it is fully opened for the first time.

[0036] Based on the oil level in the return tank during two consecutive automatic opening of the inlet emergency gate and the oil level in the return tank when the inlet emergency gate is fully open during two consecutive openings, the actual total oil volume change when the gate is fully open is calculated. The calculation formula is as follows:

[0037]

[0038] in, This represents the actual change in total oil volume when the gate is fully open. The effective length within the return tank. The effective width within the return oil tank. This refers to the oil level in the return tank during the first automatic opening of the inlet emergency gate. This refers to the liquid level in the return oil tank when the emergency gate at the inlet is fully open for the second time.

[0039] The present invention also provides a leakage prediction device for the hydraulic system of an inlet emergency gate, comprising:

[0040] The data acquisition module acquires the time when the emergency gate at the inlet is raised to the fully open position for three consecutive times and sets the alarm prediction time for serious faults and the alarm prediction time for minor anomalies.

[0041] The gate lifting interval calculation module calculates the interval between the first and second gate lifting times and the interval between the second and third gate lifting times of the inlet emergency gate based on the time taken for the inlet emergency gate to be raised to the fully open position in three adjacent periods.

[0042] The time difference calculation module calculates the difference between the time intervals of the first and second lifting of the inlet emergency gate and the time intervals of the second and third lifting of the inlet emergency gate to obtain the gate lifting interval time difference value.

[0043] The fourth gate calculation module calculates the fourth gate full opening time using the difference in the gate lifting interval and the second and third gate lifting intervals of the inlet emergency gate.

[0044] The testing module calculates the interval between the 3rd and 4th opening of the inlet emergency gate based on the fourth gate's full opening time. If the interval between the 3rd and 4th opening of the inlet emergency gate is less than the predicted time for a serious fault alarm, then it is determined that there is a serious fault in the internal leakage of the inlet emergency gate. If the interval between the 3rd and 4th opening of the inlet emergency gate is greater than the predicted time for a serious fault alarm but less than the predicted time for a minor abnormality alarm, then it is determined that there is a minor abnormality in the internal leakage of the inlet emergency gate. If the interval between the 3rd and 4th opening of the inlet emergency gate is greater than the predicted time for a minor abnormality alarm, then it is determined that the internal leakage of the inlet emergency gate is normal.

[0045] The present invention also provides a leakage prediction device for the hydraulic system of an inlet emergency gate, comprising:

[0046] Memory, used to store computer programs;

[0047] A processor is used to execute the computer program to implement the steps of the above-described method for predicting leakage in the hydraulic system of the inlet emergency gate.

[0048] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described method for predicting leakage in the hydraulic system of an inlet emergency gate.

[0049] This invention provides a method for predicting leakage in the hydraulic system of an intake emergency gate. By analyzing the automatic gate-raising interval and sliding rate of adjacent gates, the method estimates the next gate-raising time and determines whether there is external leakage in the gate's hydraulic system and reflects the trend of internal leakage changes. This facilitates maintenance personnel's understanding of the internal leakage situation of the gate's hydraulic system, allowing for advance preparation of maintenance plans and schemes, procurement of replacement materials and tools, and preparation for emergency response. Utilizing the automated components and control unit of the intake emergency gate's hydraulic circuit, along with its connected computer, the method monitors real-time data by comparing the total oil outflow and return to the tank. This provides a simple and quick way to monitor external leakage in the intake emergency gate. By predicting the next gate-raising time and interval, the method achieves accurate, effective, simple, and rapid real-time detection of internal leakage in the intake emergency gate's hydraulic system. Attached Figure Description

[0050] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0051] Figure 1 A flowchart of a first specific embodiment of a method for predicting leakage in a hydraulic system of an inlet emergency gate provided by the present invention;

[0052] Figure 2 A schematic diagram of the overall structure of the hydraulic cylinder of the hydraulic system for the emergency gate at the inlet;

[0053] Figure 3 A schematic diagram showing the time it takes for the emergency gate at the inlet to be raised to the fully open position in three consecutive incidents.

[0054] Figure 4 This is a structural block diagram of a leakage prediction device for a hydraulic system of an inlet emergency gate, provided in an embodiment of the present invention. Detailed Implementation

[0055] The core of this invention is to provide a method, device, equipment, and application for predicting leakage in the hydraulic system of an inlet emergency gate. By using the automatic gate lifting interval and sliding rate of adjacent gates, the timing of the next gate lifting can be estimated, thereby achieving accurate, effective, simple, and fast real-time detection of internal leakage in the hydraulic system of the inlet emergency gate.

[0056] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] The following describes a method for predicting leakage in the hydraulic system of an inlet emergency gate according to an embodiment of the present invention, with reference to the accompanying drawings.

[0058] Please refer to Figure 1 , Figure 1 The flowchart illustrates a first specific embodiment of a leakage prediction method for a hydraulic system of an inlet emergency gate provided by the present invention; the specific operation steps are as follows:

[0059] Step S101: Obtain the time when the emergency gate of the inlet is raised to the fully open position for three consecutive times and set the alarm prediction time for serious faults and the alarm prediction time for minor abnormalities;

[0060] The system uses a local opening displacement sensor, photoelectric converter, gate control unit, and connected computer to acquire the gate opening value during two consecutive automatic gate openings at the intake emergency gate. , and the opening value when the gate is fully open during three adjacent inlet accidents. , , .

[0061] Step S102: Calculate the interval between the first and second opening of the inlet emergency gate and the interval between the second and third opening of the inlet emergency gate based on the time taken for the three adjacent inlet emergency gates to be raised to the fully open position;

[0062] The interval between the first and second opening times of the inlet emergency gate is calculated based on the time taken for three consecutive inlet emergency gates to reach the fully open position. The calculation formula is as follows:

[0063]

[0064] in, This refers to the interval between the first and second opening of the emergency gate at the intake. The time when the emergency gate at the inlet is first raised to the fully open position. The time when the emergency gate at the inlet is raised to the fully open position for the second time;

[0065] The intervals between the first and second openings of the inlet emergency gate and the time taken for the third opening of the inlet emergency gate to reach the fully open position are calculated using the following formula:

[0066]

[0067] in, This refers to the interval between the second and third opening of the emergency gate at the intake. This refers to the time when the emergency gate at the inlet is raised to the fully open position for the third time.

[0068] Step S103: Subtract the time interval between the first and second lifting of the inlet emergency gate from the time interval between the second and third lifting of the inlet emergency gate to obtain the gate lifting interval time difference value;

[0069] The formula for calculating the time difference between gate lifting intervals is as follows:

[0070]

[0071] in, This represents the time difference between the gate lifting intervals. This refers to the interval between the first and second opening of the emergency gate at the inlet.

[0072] Step S104: Calculate the time for the fourth gate to be fully opened using the time difference between the gate lifting intervals and the time intervals between the second and third lifting of the emergency gate at the inlet;

[0073] The time for the fourth full opening of the gate is calculated using the interval between the second and third gate openings at the inlet emergency gate and the difference between the gate opening intervals. The calculation formula is as follows:

[0074]

[0075] in, This is the time for the fourth time the gates are fully opened. This refers to the time when the emergency gate at the inlet is raised to the fully open position for the third time.

[0076] Step S105: Based on the fourth full-opening time of the gate, calculate the interval between the 3rd and 4th opening of the inlet emergency gate. If the interval between the 3rd and 4th opening of the inlet emergency gate is less than the predicted time of the serious fault alarm, then it is determined that there is a serious fault in the internal leakage of the inlet emergency gate; if the interval between the 3rd and 4th opening of the inlet emergency gate is greater than the predicted time of the serious fault alarm but less than the predicted time of the minor abnormality alarm, then it is determined that there is a minor abnormality in the internal leakage of the inlet emergency gate; if the interval between the 3rd and 4th opening of the inlet emergency gate is greater than the predicted time of the minor abnormality alarm, then it is determined that the internal leakage of the inlet emergency gate is normal.

[0077] If the interval between the 3rd and 4th lifting of the inlet emergency gate is longer than the interval between the 2nd and 3rd lifting of the inlet emergency gate, it is determined that the interval between the 3rd and 4th lifting of the inlet emergency gate is longer than the interval between the 2nd and 3rd lifting of the inlet emergency gate, and the internal leakage of the hydraulic system is reduced compared with the previous internal leakage.

[0078] If the interval between the 3rd and 4th lifting of the inlet emergency gate is less than the interval between the 2nd and 3rd lifting of the inlet emergency gate, it is determined that the interval between the 3rd and 4th lifting of the inlet emergency gate is shorter than the interval between the 2nd and 3rd lifting of the inlet emergency gate, and the internal leakage of the hydraulic system is greater than the previous internal leakage.

[0079] If the interval between the 3rd and 4th lifting of the inlet emergency gate is equal to the interval between the 2nd and 3rd lifting of the inlet emergency gate, it is determined that the interval between the 3rd and 4th lifting of the inlet emergency gate is consistent with the interval between the 2nd and 3rd lifting of the inlet emergency gate, and the internal leakage of the hydraulic system has not changed compared with the previous internal leakage.

[0080] This embodiment also provides a method for determining whether there is a leak by using the total oil volume of the hydraulic cylinder, as detailed below:

[0081] Obtain the opening value of the emergency gate at the inlet and the corresponding oil tank level height.

[0082] Based on the opening value, the total oil volume change value and the actual total oil volume change when the gate is fully open are calculated.

[0083] The total change in oil volume is calculated using the gate opening values ​​during two consecutive automatic gate lifting events at the inlet and the gate opening values ​​when both inlet emergency gates are fully open. The calculation formula is as follows:

[0084]

[0085] in, This represents the change in total oil volume. This refers to the total amount of oil flowing into the rod chamber of the hydraulic cylinder during the first transition from the automatic door lifting position to the fully open position. The diameter of the rod in the rod-side chamber of the hydraulic cylinder for the inlet emergency gate. The inner diameter of the hydraulic cylinder. This refers to the opening degree of the gate during the first automatic opening of the emergency gate at the inlet. This is the opening value of the inlet emergency gate when it is fully opened for the first time.

[0086] Based on the oil level in the return tank during two consecutive automatic opening of the inlet emergency gate and the oil level in the return tank when the inlet emergency gate is fully open during two consecutive openings, the actual total oil volume change when the gate is fully open is calculated. The calculation formula is as follows:

[0087]

[0088] in, This represents the actual change in total oil volume when the gate is fully open. The effective length within the return tank. The effective width within the return oil tank. This refers to the oil level in the return tank during the first automatic opening of the inlet emergency gate. This refers to the liquid level in the return oil tank when the emergency gate at the inlet is fully open for the second time.

[0089] If the expected change in total oil volume is greater than the actual change in total oil volume when the gate is fully open, it is determined that there is an external leak in the gate hydraulic system; if the expected change in total oil volume is equal to the actual change in total oil volume when the gate is fully open, it is determined that there is no external leak in the gate hydraulic system; if the expected change in total oil volume is less than the actual change in total oil volume when the gate is fully open, it is determined that there is water ingress in the gate hydraulic system or an inlet accident, and the gate has a refueling operation in the return oil tank during the downward movement of the gate.

[0090] This embodiment provides a method for predicting leakage in the hydraulic system of an inlet emergency gate. By using the automatic gate lifting interval and sliding rate of adjacent gates, the method can estimate the next gate lifting time and determine whether there is external leakage in the gate hydraulic system and reflect the internal leakage trend of the system. This allows maintenance personnel to understand the internal leakage of the gate hydraulic system, prepare maintenance plans and schemes in advance, purchase replacement materials and tools, and make preparations for emergency response.

[0091] Based on the above embodiments, this embodiment also provides a method for judging internal leakage based on oil pump operating efficiency and operating rate, as follows:

[0092] like Figure 2 As shown, the hydraulic cylinder of the inlet emergency gate hydraulic system is cylindrical, and is set... This indicates the rod diameter of the rod-shaped chamber in the hydraulic cylinder of the inlet emergency gate. Indicates the inner diameter of the hydraulic cylinder. Indicates the predicted alarm time for a serious fault such as the inlet gate sliding down. This indicates the predicted alarm time for a minor abnormality in the downward movement of the intake gate, where... , Indicates the alarm prediction time for a serious malfunction of the oil pump at the inlet gate. This indicates the predicted alarm time for minor abnormalities in the oil pump operation of the inlet gate in case of an accident. ;set up This indicates the alarm rate of oil flow in the rod cavity of the inlet emergency gate. This indicates the rate at which the inlet gate slides down in case of an accident.

[0093] The hydraulic system return oil tank of the inlet emergency gate is a cuboid. Let L be the design length of the return oil tank, B be the design width of the return oil tank, and H be the design height of the return oil tank.

[0094] The system uses a local opening displacement sensor, photoelectric converter, gate control unit, and connected computer to acquire the gate opening value during two consecutive automatic gate openings at the intake emergency gate. , and the opening value when the gate is fully open during three adjacent inlet accidents. , , ;

[0095] The liquid level in the return oil tank of the inlet emergency gate is obtained through the level gauge, input / output module, and connected computer of the return oil tank during two consecutive automatic gate openings of the inlet emergency gate. , The liquid level in the return oil tank when the gate is fully open , ;

[0096] like Figure 2 As shown, the automatic opening time of the inlet emergency gate is obtained from two consecutive times via the inlet emergency gate oil pump start / stop counter, time counter, control unit, and connected computer. , The time between the emergency gates at the adjacent three intakes being raised to the fully open position , , ;

[0097] The obtained automatic gate lifting time of two consecutive inlet emergency gates , The time between the emergency gates at the adjacent three intakes being raised to the fully open position , , The operating time of the oil pump at the emergency gate of the inlet for two consecutive water inlets is calculated using the following formula:

[0098]

[0099]

[0100] In the formula, This indicates the operating time of the oil pump during the first lifting of the inlet emergency gate. This indicates the time when the emergency gate at the inlet was raised to the fully open position for the second time. This indicates the time when the emergency gate at the inlet automatically opens for the first time. This indicates the operating time of the oil pump during the second lifting of the inlet emergency gate. This indicates the time when the emergency gate at the inlet was raised to the fully open position for the third time. This indicates the time when the emergency gate at the inlet automatically opens for the second time.

[0101] Oil pump running time during the first opening of the inlet emergency gate. Oil pump running time during the second lifting of the inlet emergency gate. The average operating time of the oil pump at the intake gate during two consecutive inlet accidents is calculated using the following formula:

[0102]

[0103] in, This indicates the average operating time of the oil pump at the intake gate during two consecutive inlet accidents. This indicates the operating time of the oil pump during the first lifting of the inlet emergency gate. This indicates the operating time of the oil pump during the second lifting of the emergency gate at the inlet.

[0104] Since the intake emergency gate is controlled by a program according to a set value, the opening degree of the gate during each automatic opening is basically the same as the opening degree when it is fully open. Therefore, the opening degree of the gate during the third automatic opening of the intake emergency gate can be calculated by referring to the opening degree of the gate during the previous two automatic openings and the fully open openings. That is, the opening degree of the gate during the third automatic opening of the intake emergency gate is calculated based on the opening degree of the gate during the two consecutive automatic openings of the intake emergency gate. , Calculate the gate opening value when the emergency gate at the inlet automatically opens for the third time using the following formula:

[0105]

[0106] In the formula, This indicates the gate opening value when the emergency gate at the inlet automatically opens for the third time. This indicates the opening degree of the gate when the emergency gate at the inlet is automatically opened for the first time. This indicates the opening degree of the gate when the emergency gate at the inlet automatically opens for the second time.

[0107] The obtained gate opening values ​​during two consecutive emergency gate openings at the inlet. , and the opening value when the gate is fully open during three adjacent inlet accidents. , , Automatic gate lifting time during two adjacent inlet accidents , The time between the emergency gates at the adjacent three intakes being raised to the fully open position , , The third automatic gate lifting time at the inlet emergency gate and the opening value of the gate during the third automatic opening of the inlet emergency gate. Calculate the gate sliding rate of the second and third time during the emergency gate at the inlet using the following formula:

[0108]

[0109]

[0110] in, This indicates the rate at which the intake gate descends for the third time in an emergency. This indicates the opening value of the inlet emergency gate when it is fully opened for the second time. This indicates the gate opening value when the emergency gate at the inlet automatically opens for the second time. This indicates the time when the emergency gate at the inlet was raised to the fully open position for the second time. This indicates the time when the emergency gate at the inlet automatically opens for the second time. This indicates the rate at which the intake gate descends for the third time in an emergency. This indicates the opening value of the inlet emergency gate when it is fully opened for the third time. This indicates the gate opening value when the emergency gate at the inlet automatically opens for the third time. This indicates the time when the emergency gate at the inlet was raised to the fully open position for the third time. This indicates the time when the emergency gate at the inlet automatically opens for the third time.

[0111] Based on the total amount of oil flowing out of the rod chamber of the hydraulic cylinder during the second downward movement of the inlet emergency gate from the fully open position to the automatic lifting position... The total amount of oil flowing out of the rod chamber of the hydraulic cylinder during the third descent of the inlet emergency gate from the fully open position to the automatic lifting position. Automatic gate lifting time between two adjacent inlet accidents , The time between the emergency gates at the adjacent three intakes being raised to the fully open position , , and the time of the third automatic opening of the inlet emergency gate. Calculate the oil flow velocity in the rod chamber of the hydraulic cylinder during the sliding process of the emergency gate at the inlet using the following formula:

[0112]

[0113]

[0114] in, This indicates the oil flow velocity in the rod chamber of the hydraulic cylinder during the second downward movement of the emergency gate at the inlet. This indicates the oil flow velocity in the rod chamber of the hydraulic cylinder during the third downward movement of the emergency gate at the inlet. This indicates the total amount of oil flowing out of the rod chamber of the hydraulic cylinder during the second descent of the emergency gate at the inlet from the fully open position to the automatic lifting position. This indicates the total amount of oil flowing out of the rod chamber of the hydraulic cylinder during the third descent of the emergency gate at the inlet from the fully open position to the automatic lifting position. This indicates the time when the emergency gate at the inlet was raised to the fully open position for the second time. This indicates the time when the emergency gate at the inlet automatically opens for the second time. This indicates the time when the emergency gate at the inlet was raised to the fully open position for the third time. This indicates the time when the emergency gate at the inlet automatically opens for the third time.

[0115] Judgment based on oil pump operating efficiency:

[0116] The running time of the oil pump of the emergency gate at two adjacent inlet water inlets , Predicted alarm time for severe malfunction of oil pump at inlet emergency gate Predicted alarm time for minor abnormal operation of the oil pump at the inlet gate. Comparison:

[0117] like and If the oil pump of the inlet emergency gate is found to have a serious malfunction, an immediate inspection of the oil pump is required.

[0118] like or It is determined that there is a slight abnormality in the oil pump of the inlet emergency gate, and a maintenance plan needs to be formulated to inspect the oil pump at an opportune time.

[0119] like or If the oil pump of the inlet emergency gate is determined to be operating normally, then the following three situations exist;

[0120] like It was determined that the operating efficiency of the oil pumps at the gates of the inlet was basically the same in two adjacent accidents.

[0121] like It was determined that the operating efficiency of the gate oil pump in this inlet accident was lower than that of the previous one.

[0122] like This indicates that the operating time of the gate oil pump in this inlet accident was shorter than the previous one.

[0123] Judgment based on oil pump operating speed:

[0124] The oil flow rate in the rod chamber of the hydraulic cylinder during the sliding of the emergency gate at the inlet , and the rate of descent of the inlet gate in case of an accident , The set oil flow alarm rate in the rod chamber of the inlet emergency gate. , Inlet accident gate sliding rate Comparison:

[0125] like or If the rate of the third downward slide of the inlet emergency gate exceeds the alarm rate, manual intervention or close monitoring is required.

[0126] like and There are three possible scenarios:

[0127] = The sloping rate of the inlet emergency gate is determined to be within the allowable range, and there is no significant change in the internal leakage of the hydraulic system of the inlet emergency gate between two adjacent tests.

[0128] The judgment is that the downward sliding rate of the inlet emergency gate is within the allowable range, and the downward sliding rate of the inlet emergency gate this time is slower than the last time, and the internal leakage of the hydraulic system is reduced compared with the last time.

[0129] The sliding rate of the inlet emergency gate is within the allowable range, but the sliding rate of the inlet emergency gate is faster than the last time, the internal leakage of the hydraulic system is greater than the last time, and the sealing performance of the sealing ring shows a deterioration trend.

[0130] This embodiment provides a method for predicting leakage in the hydraulic system of a gate based on the operating efficiency and rate of the oil pump. By using automated components and control units of the hydraulic circuit of the inlet emergency gate, and their connected computer to monitor data in real time, it compares the total oil outflow from the hydraulic system with the total oil inflow to the return tank. This allows for simple and quick monitoring of external leakage in the inlet emergency gate and can predict the next gate lifting time and lifting interval. By calculating the gate's sliding rate and oil flow, the internal leakage changes in the hydraulic system are analyzed, enabling the assessment of the sealing trend of the inlet emergency gate cylinder. This eliminates the need for specialized equipment or decommissioning equipment for internal leakage measurement tests, significantly improving the efficiency of maintenance personnel in locating leakage faults in the inlet emergency gate's hydraulic system.

[0131] Based on the above embodiments, this embodiment provides specific data to illustrate a method for predicting leakage in the hydraulic system of an inlet emergency gate, as follows:

[0132] The hydraulic cylinder of the inlet emergency gate hydraulic system is cylindrical, and is set... This indicates the rod diameter of the rod-shaped chamber in the hydraulic cylinder of the inlet emergency gate. Indicates the inner diameter of the hydraulic cylinder. Indicates the predicted alarm time for a serious fault such as the inlet gate sliding down. This indicates the predicted alarm time for a minor abnormality in the downward movement of the intake gate, where... , Indicates the alarm prediction time for a serious malfunction of the oil pump at the inlet gate. This indicates the predicted alarm time for minor abnormalities in the oil pump operation of the inlet gate in case of an accident. ;set up This indicates the alarm rate of oil flow in the rod cavity of the inlet emergency gate. This indicates the rate at which the inlet gate slides down in case of an accident.

[0133] set up:

[0134] =380mm, =770mm,

[0135] =10 days =20 days =40s, =60s,

[0136] =25mm³ / s, =20mm / day.

[0137] The hydraulic system return oil tank of the inlet emergency gate is a cuboid. Let L be the design length of the return oil tank, B be the design width of the return oil tank, and H be the design height of the return oil tank.

[0138] set up:

[0139] L=2500mm, B=1500mm, H=1780mm;

[0140] The system uses a local opening displacement sensor, photoelectric converter, gate control unit, and connected computer to acquire the gate opening values ​​during two consecutive automatic gate openings at the inlet emergency gate. , and the opening value when the gate is fully open during three adjacent inlet accidents. , , ;

[0141] =11811.5mm, =11811.5mm,

[0142] =12011.7mm, =12006.8mm,

[0143] =12011.7mm

[0144] The liquid level in the return oil tank of the inlet emergency gate is obtained through the level gauge, input / output module, and connected computer of the return oil tank during two consecutive automatic gate openings of the inlet emergency gate. , The liquid level in the return oil tank when the gate is fully open , ;

[0145] =816mm, =816mm, =810mm, =810mm

[0146] Based on the gate opening value during two consecutive inlet accidents when the gate automatically opens. , and the opening value when the gate is fully open during two adjacent inlet accidents. , Calculate the amount of oil flowing into the rod chamber of the hydraulic cylinder during the process of the emergency gate at the inlet moving from the automatic lifting position to the fully open position using the following formula (this amount of oil is consistent with the amount of oil flowing out of the rod chamber of the hydraulic cylinder during the process of the emergency gate at the inlet moving from the fully open position to the automatic lifting position):

[0147] =3.14 {(770 / 2)²-(380 / 2)²} (12011.7-11811.5)

[0148] =70484914.5mm³

[0149] =3.14 {(770 / 2)²-(380 / 2)²} (12006.8-11811.5)

[0150] =68759759.25mm³

[0151] Based on the gate opening value during two consecutive inlet accidents when the gate automatically opens. , and the opening value when the gate is fully open during two adjacent inlet accidents. , The amount of oil flowing back from the rodless chamber to the return oil tank during the process of the emergency gate at the inlet moving from the automatic lifting position to the fully open position is calculated using the following formula:

[0152] =3.14 (770 / 2)² (12011.7-11811.5)=93178385.3mm³

[0153] =3.14 (770 / 2)² (12006.8-11811.5)=90897795.45mm³

[0154] The change in total oil volume in the return oil tank during the process of the inlet emergency gate moving from the automatic lifting position to the fully open position is calculated using the following formula (this change in oil volume is consistent with the change in total oil volume in the return oil tank during the process of the inlet emergency gate moving from the fully open position to the automatic lifting position):

[0155] =3.14 (770 / 2)² (12011.7-11811.5) -3.14 [(770 / 2)²-(380 / 2)²] (12011.7-11811.5)=22693470.8mm³

[0156] =3.14 (770 / 2)² (12006.8-11811.5) -3.14 [(770 / 2)²-(380 / 2)²] (12006.8-11811.5)=22138036.2mm³

[0157] Based on the liquid level in the return oil tank during the automatic opening of the gate in two consecutive inlet accidents. , The liquid level in the return oil tank when the emergency gates at the inlet are fully open on two adjacent occasions. , Calculate the change in total oil volume in the oil return tank during the process of the emergency gate at the inlet moving from the automatic lifting position to the fully open position using the following formula:

[0158] =1500 2500 (816-810) = 22312500 mm³

[0159] =1500 2500 (815.9-810) = 22125000 mm³

[0160] like Figure 3 As shown, the automatic opening time of the inlet emergency gate is obtained from two consecutive times via the inlet emergency gate oil pump start / stop counter, time counter, control unit, and connected computer. , The time between the emergency gates at the adjacent three intakes being raised to the fully open position , , The diagram is as follows:

[0161] The query data yields:

[0162] =July 8, 2022 02:46:04:756

[0163] =July 22, 2022, 13:52:07:985

[0164] =June 21, 2022 07:21:17:662

[0165] =July 8, 2022 02:46:39:856

[0166] =July 22, 2022, 13:52:43:285

[0167] Based on the automatic gate lifting time of two adjacent inlet accidents , The time between the emergency gates at the adjacent three intakes being raised to the fully open position , , The operating time of the oil pump at the emergency gate of the inlet for two consecutive water inlets is calculated using the following formula:

[0168] =2022-07-08 02:46:39:856 - 2022-07-08 02:46:04:756 = 35.1s

[0169] =2022-07-22 13:52:43:285 - 2022-07-22 13:52:07:985 = 35.3s

[0170] Based on the oil pump's operating time during the first opening of the inlet emergency gate... Oil pump running time during the second lifting of the inlet emergency gate. The average operating time of the oil pump at the intake gate during two consecutive inlet accidents is calculated using the following formula:

[0171] (35.1+35.3) / 2=35.2s=00:00:35:200

[0172] Based on the time it took for the gate to be raised to the fully open position in three consecutive inlet accidents. , , Calculate the interval between two consecutive emergency gate openings at the inlet using the following formula:

[0173] July 8, 2022, 02:46:39:856 - June 21, 2022, 07:21:17:662

[0174] =403:25:22:194

[0175] =July 22, 2022, 13:52:43:285 - July 8, 2022, 02:46:39:856

[0176] =347:06:03:429

[0177] Based on the interval between two adjacent inlet accident gate openings , Calculate the time difference between two consecutive emergency gate openings at the inlet using the following formula:

[0178] 347:06:03:429-403:25:22:194=-56:19:18:765

[0179] Based on the time difference between the opening intervals of two adjacent inlet gate accidents. Interval between the second and third openings of the emergency gate at the inlet. Calculate the time required for the inlet emergency gate to be raised to the fully open position for the fourth time using the following formula:

[0180] July 22, 2022, 13:52:43:285 +347:06:03:429 -56:19:18:765

[0181] =304:39:27:949=August 3, 2022, 16:39:27:949

[0182] Based on the time when the inlet emergency gate was raised to the fully open position for the fourth time... The time between the emergency gates at the adjacent three intakes being raised to the fully open position , , Calculate the interval between the 3rd and 4th opening of the inlet emergency gate using the following formula:

[0183] 304:39:27:949-13:52:43:285=290:46:44:664

[0184] Based on the time when the inlet emergency gate was raised to the fully open position for the fourth time... Based on the average operating time of the oil pumps of the two adjacent inlet emergency gates, the time for the third automatic gate opening at the inlet emergency gate is calculated using the following formula:

[0185] =August 3, 2022, 16:39:27:949-00:00:35:200

[0186] 304:39:27:949-00:00:35:200=304:38:52:749

[0187] =August 3, 2022, 16:38:52:749

[0188] Since the intake emergency gate is controlled by a program according to a set value, the opening degree of the gate during each automatic opening is basically the same as the opening degree when it is fully open. Therefore, the opening degree of the gate during the third automatic opening of the intake emergency gate can be calculated by referring to the opening degree of the gate during the previous two automatic openings and the fully open openings. That is, the opening degree of the gate during the third automatic opening of the intake emergency gate is calculated based on the opening degree of the gate during the two consecutive automatic openings of the intake emergency gate. , Calculate the gate opening value when the emergency gate at the inlet automatically opens for the third time using the following formula:

[0189] =(11811.5+11811.5) / 2=11811.5mm

[0190] Based on the gate opening values ​​during two consecutive automatic gate lifting events at the inlet, the gate opening values ​​during three consecutive fully open events at the inlet, the automatic gate lifting times during two consecutive automatic gate lifting events, the time it takes for the gate to reach the fully open position during three consecutive automatic gate lifting events, the third automatic gate lifting time at the inlet, and the gate opening value during the third automatic gate lifting event, the gate slid-down rates for the second and third events at the inlet are calculated using the following formula:

[0191] (12006.8-11811.5) / (July 22, 2022, 13:52:07:985)

[0192] - July 8, 2022, 02:46:39:856

[0193] =195.3 / 347:05:28:129=195.3 / 1249528.129=0.000156299mm / s=13.51mm / day

[0194] (12011.7-11811.5) / (August 3, 2022, 16:38:52:749)

[0195] - July 22, 2022, 13:52:43:285)

[0196] 200.2 / 290:46:09:464=200.2 / 1046769.464=0.000191255mm / s=16.53mm / day

[0197] Based on the opening values ​​of the inlet emergency gate when it is fully open for three consecutive times and the opening value of the gate when it is automatically lifted for the third time, the total amount of oil flowing out of the rod chamber of the hydraulic cylinder during the process of the inlet emergency gate sliding down from the fully open position to the automatic lifting position for the third time is calculated using the following formula:

[0198] 3.14 (770 / 2)² (12011.7-11811.5) -3.14 {(770 / 2)²-(380 / 2)²} (12011.7-11811.5)=22693470.8mm³

[0199] Based on the total oil flow from the rod chamber of the hydraulic cylinder during the second descent of the inlet emergency gate from the fully open position to the automatic lifting position, the total oil flow from the rod chamber of the hydraulic cylinder during the third descent of the inlet emergency gate from the fully open position to the automatic lifting position, the automatic lifting time of the inlet emergency gate in two adjacent periods, the time of the inlet emergency gate in three adjacent periods to the fully open position, and the automatic lifting time of the inlet emergency gate in the third period, the oil flow velocity in the rod chamber of the hydraulic cylinder during the descent of the inlet emergency gate is calculated using the following formula:

[0200] (22138036.2) / (July 22, 2022, 13:52:07:985)

[0201] - July 8, 2022, 02:46:39:856

[0202] =22138036.2 / 347:05:28:129=22138036.2 / 1249528.129=17.717mm3 / s

[0203] (22693470.8) / (August 3, 2022, 16:38:52:749)

[0204] - July 22, 2022, 13:52:43:285)

[0205] 22693470.8 / 290:46:09:464=22693470.8 / 1046769.464=21.680mm3 / s

[0206] This invention provides a method for predicting leakage in the hydraulic system of an inlet emergency gate. The hydraulic system of the inlet emergency gate (comprising the rod-side chamber and rodless chamber of the hoist relay, oil pipelines, and a return oil tank) is an independent closed oil circulation system. It should adhere to the principle of fluid mechanics continuity: "When an ideal liquid flows steadily in a pipe, according to the law of conservation of mass, the amount of liquid in the pipe can neither increase nor decrease." By utilizing the automated components and control unit of the inlet emergency gate's hydraulic circuit, and the connected computer, real-time monitoring data is obtained. The total oil outflow from the hydraulic system is compared with the total oil inflow into the return oil tank, enabling simple and quick monitoring of external leakage in the inlet emergency gate. Furthermore, by predicting the next gate opening time and the gate opening interval, accurate, effective, simple, and quick real-time detection of internal leakage in the inlet emergency gate's hydraulic system is achieved.

[0207] Please refer to Figure 4 , Figure 4 A structural block diagram of a leakage prediction device for a hydraulic system of an inlet emergency gate provided in an embodiment of the present invention; the specific device may include:

[0208] The data acquisition module 100 acquires the time when the emergency gate of the water inlet is raised to the fully open position for three consecutive times and sets the alarm prediction time for serious faults and the alarm prediction time for minor abnormalities.

[0209] The gate lifting interval calculation module 200 calculates the first and second gate lifting intervals and the second and third gate lifting intervals of the inlet emergency gate based on the time taken for the three adjacent inlet emergency gates to be raised to the fully open position.

[0210] The time difference calculation module 300 calculates the difference between the time intervals of the first and second lifting of the inlet emergency gate and the time intervals of the second and third lifting of the inlet emergency gate to obtain the gate lifting interval time difference value.

[0211] The fourth gate calculation module 400 calculates the fourth gate full opening time using the difference in the gate lifting interval and the second and third gate lifting interval of the inlet emergency gate.

[0212] The testing module 500 calculates the interval between the 3rd and 4th opening of the inlet emergency gate based on the fourth full opening time of the gate. If the interval between the 3rd and 4th opening of the inlet emergency gate is less than the predicted time of the serious fault alarm, it is determined that there is a serious fault in the internal leakage of the inlet emergency gate; if the interval between the 3rd and 4th opening of the inlet emergency gate is greater than the predicted time of the serious fault alarm but less than the predicted time of the minor abnormality alarm, it is determined that there is a minor abnormality in the internal leakage of the inlet emergency gate; if the interval between the 3rd and 4th opening of the inlet emergency gate is greater than the predicted time of the minor abnormality alarm, it is determined that the internal leakage of the inlet emergency gate is normal.

[0213] This embodiment provides a leakage prediction device for the hydraulic system of an inlet emergency gate, used to implement the aforementioned leakage prediction method for the hydraulic system of an inlet emergency gate. Therefore, the specific implementation of this device can be found in the embodiment section of the aforementioned leakage prediction method for the hydraulic system of an inlet emergency gate. For example, the data acquisition module 100, the gate lifting interval calculation module 200, the time difference calculation module 300, the fourth gate calculation module 400, and the testing module 500 are respectively used to implement steps S001, S102, S103, S104, and S105 in the aforementioned leakage prediction method for the hydraulic system of an inlet emergency gate. Therefore, the specific implementation can be referred to the descriptions of the corresponding embodiments, and will not be repeated here.

[0214] A specific embodiment of the present invention also provides a leakage prediction device for the hydraulic system of an inlet emergency gate, comprising: a memory for storing a computer program; and a processor for executing the computer program to implement the steps of the above-mentioned leakage prediction method for the hydraulic system of an inlet emergency gate.

[0215] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0216] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0217] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of the invention pertain.

[0218] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0219] The foregoing has provided a detailed description of the method, apparatus, equipment, and application for predicting leakage in the hydraulic system of an inlet emergency gate provided by this invention. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

[0220] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any of the following techniques known in the art, or a combination thereof: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0221] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0222] Furthermore, the functional units in the various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

Claims

1. A method for predicting leakage in the hydraulic system of an inlet emergency gate, characterized in that, include: Obtain the time when the emergency gate at the inlet is raised to the fully open position for three consecutive water inlets and set the alarm prediction time for serious faults and the alarm prediction time for minor anomalies. The interval between the first and second opening of the inlet emergency gate and the interval between the second and third opening of the inlet emergency gate are calculated based on the time taken for the three adjacent inlet emergency gates to be raised to the fully open position. The difference between the first and second opening intervals of the inlet emergency gate and the second and third opening intervals of the inlet emergency gate is obtained as the gate opening interval difference value. The time for the fourth gate to be fully opened is calculated using the time difference between the gate lifting intervals and the time intervals between the second and third lifting of the emergency gate at the inlet. Based on the fourth full-opening time of the gate, the interval between the third and fourth gate openings of the inlet emergency gate is calculated. If the interval between the third and fourth gate openings of the inlet emergency gate is less than the predicted time of the serious fault alarm, then it is determined that there is a serious fault in the internal leakage of the inlet emergency gate; if the interval between the third and fourth gate openings of the inlet emergency gate is greater than the predicted time of the serious fault alarm but less than the predicted time of the minor abnormality alarm, then it is determined that there is a minor abnormality in the internal leakage of the inlet emergency gate; if the interval between the third and fourth gate openings of the inlet emergency gate is greater than the predicted time of the minor abnormality alarm, then it is determined that the internal leakage of the inlet emergency gate is normal. The statement that if the interval between the 3rd and 4th opening of the inlet emergency gate is greater than the predicted time of the minor abnormality alarm, then the internal leakage of the inlet emergency gate is judged to be normal includes: If the interval between the 3rd and 4th lifting of the inlet emergency gate is longer than the interval between the 2nd and 3rd lifting of the inlet emergency gate, it is determined that the interval between the 3rd and 4th lifting of the inlet emergency gate is longer than the interval between the 2nd and 3rd lifting of the inlet emergency gate, and the internal leakage of the hydraulic system is reduced compared with the previous internal leakage. If the interval between the 3rd and 4th lifting of the inlet emergency gate is less than the interval between the 2nd and 3rd lifting of the inlet emergency gate, it is determined that the interval between the 3rd and 4th lifting of the inlet emergency gate is shorter than the interval between the 2nd and 3rd lifting of the inlet emergency gate, and the internal leakage of the hydraulic system is greater than the previous internal leakage. If the interval between the 3rd and 4th lifting of the inlet emergency gate is equal to the interval between the 2nd and 3rd lifting of the inlet emergency gate, it is determined that the interval between the 3rd and 4th lifting of the inlet emergency gate is consistent with the interval between the 2nd and 3rd lifting of the inlet emergency gate, and the internal leakage of the hydraulic system has not changed compared with the previous internal leakage.

2. The method for predicting leakage in the hydraulic system of the inlet emergency gate as described in claim 1, characterized in that, The intervals between the first and second openings of the inlet emergency gate, and between the second and third openings of the inlet emergency gate, calculated based on the time taken for the three adjacent inlet emergency gates to be raised to the fully open position, include: The interval between the first and second opening times of the inlet emergency gate is calculated based on the time taken for three consecutive inlet emergency gates to reach the fully open position. The calculation formula is as follows: in, This refers to the interval between the first and second opening of the emergency gate at the intake. The time when the emergency gate at the inlet is first raised to the fully open position. The time when the emergency gate at the inlet is raised to the fully open position for the second time; The intervals between the first and second openings of the inlet emergency gate and the time taken for the third opening of the inlet emergency gate to reach the fully open position are calculated using the following formula: in, This refers to the interval between the second and third opening of the emergency gate at the intake. This refers to the time when the emergency gate at the inlet is raised to the fully open position for the third time.

3. The method for predicting leakage in the hydraulic system of the inlet emergency gate as described in claim 2, characterized in that, The formula for calculating the difference in gate lifting intervals by subtracting the intervals between the first and second lifting of the inlet emergency gate and the second and third lifting of the inlet emergency gate is as follows: in, This represents the time difference between the gate lifting intervals. This refers to the interval between the first and second opening of the emergency gate at the inlet.

4. The method for predicting leakage in the hydraulic system of the inlet emergency gate as described in claim 3, characterized in that, The formula for calculating the fourth gate full opening time using the time difference between the gate lifting intervals and the time intervals between the second and third lifting of the inlet emergency gate is as follows: in, This is the time for the fourth time the gates are fully opened. This refers to the time when the emergency gate at the inlet is raised to the fully open position for the third time.

5. The method for predicting leakage in the hydraulic system of the inlet emergency gate as described in claim 1, characterized in that, Also includes: Obtain the opening value of the emergency gate at the inlet and the corresponding oil tank level height; Based on the opening value and the corresponding tank level height, the total oil volume change value and the actual total oil volume change when the gate is fully open are calculated. If the change in total oil volume is greater than the actual change in total oil volume when the gate is fully open, it is determined that there is an external leak in the gate hydraulic system. If the change in total oil volume is equal to the actual change in total oil volume when the gate is fully open, it is determined that there is no external leakage in the gate hydraulic system; if the change in total oil volume is less than the actual change in total oil volume when the gate is fully open, it is determined that there is water ingress in the gate hydraulic system or an inlet accident, and the gate has a refueling operation in the return oil tank during the downward movement of the gate.

6. The method for predicting leakage in the hydraulic system of the inlet emergency gate as described in claim 5, characterized in that, The total oil volume change calculated based on the opening value and the corresponding tank level height, and the actual total oil volume change when the gate is fully open, include: The total change in oil volume is calculated using the gate opening values ​​during two consecutive automatic gate lifting events at the inlet and the gate opening values ​​when both inlet emergency gates are fully open. The calculation formula is as follows: in, This represents the change in total oil volume. This refers to the amount of oil that flows back to the oil tank from the rodless chamber of the hydraulic cylinder during the first transition from the automatic door lifting position to the fully open position. This refers to the total amount of oil flowing into the rod chamber of the hydraulic cylinder during the first transition from the automatic door lifting position to the fully open position. The diameter of the rod in the rod-side chamber of the hydraulic cylinder for the inlet emergency gate. The inner diameter of the hydraulic cylinder. This refers to the opening degree of the gate during the first automatic opening of the emergency gate at the inlet. This is the opening value of the inlet emergency gate when it is fully opened for the first time. Based on the oil level in the return tank during two consecutive automatic opening of the inlet emergency gate and the oil level in the return tank when the inlet emergency gate is fully open during two consecutive openings, the actual total oil volume change when the gate is fully open is calculated. The calculation formula is as follows: in, This represents the actual change in total oil volume when the gate is fully open. The effective length within the return tank. The effective width within the return oil tank. This refers to the oil level in the return tank during the first automatic opening of the inlet emergency gate. This refers to the liquid level in the return oil tank when the emergency gate at the inlet is fully open for the second time.

7. A leakage prediction device for the hydraulic system of an inlet emergency gate, characterized in that, The method applied to any one of claims 1-6 includes: The data acquisition module acquires the time when the emergency gate at the inlet is raised to the fully open position for three consecutive times and sets the alarm prediction time for serious faults and the alarm prediction time for minor anomalies. The gate lifting interval calculation module calculates the interval between the first and second gate lifting times and the interval between the second and third gate lifting times of the inlet emergency gate based on the time taken for the inlet emergency gate to be raised to the fully open position in three adjacent periods. The time difference calculation module calculates the difference between the time intervals of the first and second lifting of the inlet emergency gate and the time intervals of the second and third lifting of the inlet emergency gate to obtain the gate lifting interval time difference value. The fourth gate calculation module calculates the fourth gate full opening time using the difference in the gate lifting interval and the second and third gate lifting intervals of the inlet emergency gate. The testing module calculates the interval between the 3rd and 4th opening of the inlet emergency gate based on the fourth full opening time of the gate. If the interval between the 3rd and 4th opening of the inlet emergency gate is less than the predicted time of the serious fault alarm, it is determined that there is a serious fault in the internal leakage of the inlet emergency gate; if the interval between the 3rd and 4th opening of the inlet emergency gate is greater than the predicted time of the serious fault alarm but less than the predicted time of the minor abnormality alarm, it is determined that there is a minor abnormality in the internal leakage of the inlet emergency gate; if the interval between the 3rd and 4th opening of the inlet emergency gate is greater than the predicted time of the minor abnormality alarm, it is determined that the internal leakage of the inlet emergency gate is normal.

8. A leakage prediction device for the hydraulic system of an inlet emergency gate, characterized in that, include: Memory, used to store computer programs; A processor, configured to execute the computer program to implement the steps of the method for predicting leakage in the hydraulic system of the inlet emergency gate as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the method for predicting leakage in the hydraulic system of the inlet emergency gate as described in any one of claims 1 to 6.

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