A method for judging abnormality of a gate hydraulic system

Abstract

The application discloses a kind of gate hydraulic system exception determination methods, by recording gate reaction data when gate opening and closing;After using the reaction data collected to calculate gate opening rate and closing rate;The obtained gate opening rate and closing rate are compared with gate opening and closing rate average respectively, and then difference data is obtained;Difference data is compared and classified, and preliminary fault information is judged;According to fault information, arrange artificial detailed inspection.Compared with prior art, the application collects the opening and closing time of the gate fixed opening interval, calculates the opening and closing rate of the gate, discovers the failure or deterioration trend of the gate in advance, takes measures to handle as soon as possible, thereby reduces the disposal cost after failure deterioration, and increases the reliability of the gate hydraulic system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water conservancy and hydropower engineering, in particular to a method for judging abnormality of gate hydraulic system. BACKGROUND

[0002] Hydropower stations are equipped with spillways for discharging excess water and ensuring ecological flow, etc., and the spillway gate is the entrance of the power station reservoir. Whether the function of the spillway gate is normal seriously affects the safe and stable operation of the power station. The power system of the spillway gate of a large hydropower station is mostly a hydraulic opening and closing system, that is, the operation of the gate is driven by an oil pump, a valve group, a servomotor and a system pipeline. Therefore, early detection of hydraulic system failure trends and early treatment of failure problems can greatly improve the reliability of the gate.

[0003] Currently, the judgment of gate hydraulic system failure in the hydropower industry mainly adopts manual inspection and system automatic monitoring. Manual inspection can mainly find external defects such as leakage, loosening and fracture with obvious abnormal phenomena, and system automatic monitoring can mainly find internal defects such as servomotor asynchrony and automatic sliding that are not easy to be detected by naked eye. However, the above judgment methods can only obtain the information when the gate hydraulic system exhibits certain degradation due to failure, which easily leads to missing the opportunity to repair the gate hydraulic system. Therefore, improvement is needed. SUMMARY

[0004] The purpose of the present application is to provide a method for judging abnormality of gate hydraulic system, which can collect key data of gate opening and closing information each time, and judge the condition of gate hydraulic system through comparative analysis of the collected data.

[0005] To achieve the above purpose, the technical solution adopted by the present application is as follows:

[0006] Step S1: record gate reaction data when the gate is opened and closed, respectively;

[0007] Step S2: calculate the opening rate and closing rate of the gate according to the collected reaction data;

[0008] Step S3: analyze and compare the opening rate and closing rate of the gate obtained in step S2, respectively, to obtain difference data;

[0009] Step S4: compare and classify the difference data to preliminarily judge the failure information;

[0010] Step S5: arrange manual detailed inspection according to the failure information.

[0011] Further, the reaction data in step S1 includes:

[0012] Gate opening to 0 m opening time T K1 Gate opening to 1 m opening time T K2 Gate closing to 1 m opening time T G1 Gate closing to 0 m opening time T G2 .

[0013] Further, the step S2 calculates the opening rate of each gate from 0 m opening to 1 m opening: And calculates the opening rate of each gate from 1 m closing to 0 m opening:

[0014] Further, in the step S3, the opening rate V K1 , V K2 , V K3 ......V Kn of each gate is judged with the effective average value of gate opening rate detection to obtain gate opening difference data, and the closing rate V G1 , V G2 , V G3 ......V Gn of each gate is judged with the effective average value of gate closing rate detection to obtain gate closing difference data.

[0015] Further, the effective average value of the gate opening rate is obtained by taking the average value between the upper and lower limits of the gate opening rate; and the effective average value of the gate closing rate is obtained by taking the average value between the upper and lower limits of the gate closing rate.

[0016] Further, in the step S4, the gate opening data difference and the gate closing data difference are respectively classified with fault information, and the classified data is compared with the fault information to obtain pre-judgment fault information.

[0017] Further, the step S5 specifically arranges specific technical personnel to manually check the gate pre-judgment fault information, confirms the fault problem, and implements maintenance.

[0018] Further, the pre-judgment fault information includes four cases respectively:

[0019] When the gate opening rate is faster than the average opening rate, the problem is that the load valve group is jammed, resulting in high system pressure;

[0020] When the gate opening rate is slower than the average opening rate, the problem is that the oil pump efficiency is reduced, the relay is leaked, the pipeline is leaked, the filter screen is blocked, the relay is deformed and the metal structure is deformed;

[0021] When the closing rate is faster than the average closing rate, the problem is pipe leakage or internal leakage in the relay.

[0022] When the closing rate is slower than the average closing rate, the problems include oil circuit blockage, relay deformation and stiffness, and metal structure deformation.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) In this invention, by collecting the opening and closing time of the gate in the fixed opening range, the opening and closing rate of the gate is calculated, the gate fault or deterioration trend can be detected in advance, and measures can be taken to deal with it in time, thereby reducing the disposal cost after the fault worsens and increasing the reliability of the gate hydraulic system.

[0025] (2) In this invention, it is only necessary to collect the opening and closing time of the gate in each fixed opening interval and perform further calculation and analysis. The operation is simple and the practicality is strong. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the steps in this invention; Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0028] Example 1

[0029] refer to Figure 1 As shown in this embodiment, a method for determining abnormalities in a gate hydraulic system includes the following steps:

[0030] Step S1: Record the gate response data when the gate opens and closes respectively;

[0031] The reaction data includes the time T for the gate to open to 0m. K1 Time T for the gate to open to a 1m opening degree K2 ; and the time T for the gate to close to a 1m opening. G1 Time T from gate closing to 0m opening G2 ;

[0032] Step S2: Calculate the gate opening rate and closing rate based on the collected reaction data;

[0033] Based on the gate opening data collected in step S1, (Unit: m / min) Calculate the opening rate of the gate from 0m to 1m each time: V K1 V K2 V K3 ......VKn ;

[0034] Then according to the gate closing data content collected in step S1, the opening rate of the gate from 1 m to 0 m opening degree each time is calculated; since the gate of the power station mostly operates in the range of 0-1.5 m opening degree (long-term 0 m), the fixed opening degree interval is selected as 0-1 m.

[0035] Step S3: analyzing and comparing the opening rate and the closing rate of the gate obtained in step S2 respectively to obtain difference data;

[0036] The opening rate V K1 , V K2 , V K3 ......V Kn of the gate each time is evaluated with the effective average value of the gate opening rate detection; wherein the effective average value of the gate opening rate is obtained by taking the average value between the upper and lower limits of the gate opening rate;

[0037] The closing rate V G1 , V G2 , V G3 ......V Gn of the gate each time is evaluated with the effective average value of the gate closing rate detection; wherein the effective average value of the gate closing rate is obtained by taking the average value between the upper and lower limits of the gate closing rate.

[0038] Step S4: comparing and classifying the difference data to preliminarily judge the fault information;

[0039] The gate opening data difference and the gate closing data difference are respectively classified with the fault information, and the classified data is compared with the fault information to obtain the preliminary judgment fault information; wherein the fault information includes that when the gate opening rate is faster than the average value of the opening rate, the problem is that the loading valve group is jammed, resulting in high system pressure;

[0040] When the gate opening rate is slower than the average value of the opening rate, the problem is that the oil pump efficiency is reduced, the servomotor is leaked, the pipeline is leaked, the filter screen is blocked, the servomotor is deformed and the metal structure is deformed;

[0041] When the closing rate is faster than the average value of the closing rate, the problem is that the pipeline is leaked and the servomotor is leaked;

[0042] When the closing rate is slower than the average value of the closing rate, the problem is that the oil way is blocked, the servomotor is deformed and the metal structure is deformed.

[0043] Step S5: arranging artificial detailed inspection according to the fault information. ​

[0044] The gate pre-judgment fault information is arranged for manual inspection by specific technicians, the fault problem is confirmed, and maintenance is implemented.

[0045] In use of the present application, firstly, the gate operation time in a certain time when the gate is in safe operation is collected, and the average opening rate and the average closing rate are taken, then the corresponding time information is collected and recorded when the power station is opened and closed each time, then the collected data is calculated to obtain the relevant rate, and the rate is compared with the average opening rate and the average closing rate obtained before, if there is no big difference, the gate is judged to have no fault, if there is big difference data, the difference data is compared with the data in the fault classification to obtain the fault information, and specific technicians are arranged for manual inspection and maintenance according to the fault information.

[0046] The above embodiment is only one of the preferred embodiments of the present application, any modification or polishing without substantial meaning made in the main design idea and spirit of the present application, and the technical problems solved are still consistent with the present application, and should be included in the protection scope of the present application.

Claims

1. A method for determining abnormalities in a gate hydraulic system, characterized in that: Includes the following steps: Step S1: Record the gate response data when the gate opens and closes, including: Time T for the gate to open to 0m K1 Time T for the gate to open to a 1m opening degree K2 ; Time T for the gate to close to 1m opening G1 Time T from gate closing to 0m opening G2； Step S2: Calculate the opening rate of the gate from 0m to 1m each time it opens. and the closing rate of the gate from 1m to 0m opening each time. ; Step S3: Analyze and compare the gate opening rate and closing rate obtained in step S2 to obtain the difference data. Specifically, this includes: calculating the gate opening rate V for each operation. K1 V K2 V K3 ......V Kn The gate opening difference data is obtained by comparing it with the effective average value of the gate opening rate detection, and the gate closing rate V for each time is also calculated. G1 V G2 V G3 ......V Gn The gate closing difference data is obtained by evaluating the effective average value of the gate closing rate detection. Step S4: Compare and classify the difference data to make a preliminary judgment on the fault information. Specifically, this includes classifying the differences in gate opening data and gate closing data with the fault information, and comparing the classified data with the fault information to obtain the preliminary judgment on the fault information. The predicted fault information includes four situations: When the gate opening rate is faster than the effective average opening rate, the problem is that the loading valve assembly is stuck, resulting in higher system pressure. When the gate opening rate is slower than the effective average opening rate, the problem may be reduced oil pump efficiency, internal leakage in the servo, pipeline leakage, filter blockage, deformation or stiffening of the servo, or deformation of the metal structure. When the gate closing rate is faster than the effective average closing rate, the problem is a pipeline leak or an internal leak in the relay. When the gate closing rate is slower than the effective average closing rate, the problem may be oil circuit blockage, relay deformation causing stiffness, or metal structure deformation. Step S5: Arrange for a detailed manual inspection based on the fault information.

2. The method for judging abnormalities in a gate hydraulic system according to claim 1, characterized in that: The effective average value of the gate opening rate is obtained by averaging the upper and lower limits of the gate opening rate; the effective average value of the gate closing rate is obtained by averaging the upper and lower limits of the gate closing rate.

3. The method for judging abnormalities in a gate hydraulic system according to claim 2, characterized in that: Step S5 specifically involves assigning specific technical personnel to manually inspect the gate based on the pre-judged fault information, confirm the fault, and carry out repairs.

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