CN119803260A - Method for detecting the opening of radial steel gates in hydropower stations - Google Patents
Method for detecting the opening of radial steel gates in hydropower stations Download PDFInfo
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- CN119803260A CN119803260A CN202510309439.0A CN202510309439A CN119803260A CN 119803260 A CN119803260 A CN 119803260A CN 202510309439 A CN202510309439 A CN 202510309439A CN 119803260 A CN119803260 A CN 119803260A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention discloses a hydropower station arc-shaped steel gate opening detection method in the technical field of hydropower station engineering, which comprises arc-shaped gate leaves and a hydraulic hoist, wherein the arc-shaped gate leaves are hinged with arc-shaped gate support seats through support arms, the end parts of piston rods of the hydraulic hoist are hinged with the arc-shaped gate leaves, the end parts of the piston rods of the hydraulic hoist, which are far away from the piston rods, are hinged with the hydraulic hoist support seats, the opening detection method of the arc-shaped gate leaves comprises the following steps of step 1, installing a distance measuring device at the end parts of the piston rods of the hydraulic hoist, step 2, enabling the piston rods of the hydraulic hoist to stretch to drive the arc-shaped gate leaves to open and close, measuring the linear distance of the movement of the end parts of the piston rods of the hydraulic hoist by the distance measuring device, and step 3, calculating the opening distance of the arc gate according to the linear distance. The method has high precision, effectively solves the problem of power failure and memory loss of the existing radial gate opening detection method, does not need to carry out complex coding operation on the piston rod of the hydraulic hoist, and has better applicability.
Description
Technical Field
The invention belongs to the technical field of hydropower station engineering, and particularly relates to a hydropower station radial steel gate opening detection method.
Background
At present, the high-water-head large-orifice arc-shaped steel gate is widely applied to water-draining buildings of hydraulic and hydroelectric engineering. In order to ensure smooth completion of flood discharge tasks, accurate gate opening detection and control are important.
The design of the arc-shaped steel gate is that a hydraulic hoist is arranged at the top or two sides of the gate, and the opening and closing operation of the arc gate around the supporting hinge is realized through the expansion and the contraction of a piston rod of the hydraulic hoist. The traditional arc gate opening detection method is to measure the expansion and contraction amount of a piston rod of the hydraulic hoist so as to reversely push out the opening of the arc gate. The detection method mainly comprises the following two steps:
1. The built-in stay rope type detection method is that a steel wire rope is arranged in a piston rod of a hydraulic hoist, and the length of the steel wire rope can be changed along with the piston rod in the extending and retracting process of the piston rod, so that the detection of the opening of an arc door is realized. However, this method has some drawbacks such as difficulty in replacing the wire rope, and the wire rope is liable to develop a wire-bloom phenomenon after long-term use, and the coil spring is also liable to fatigue, resulting in inaccuracy of measurement accuracy.
2. The detection method of the sensor at the end part of the piston rod is characterized in that an output signal sensor is arranged at the end part of the piston rod, the sensors are divided into an incremental type sensor and an absolute type sensor, and the detection of the opening degree of the arc door is realized by scanning the position information on the piston rod. The incremental output signal sensor can not memorize the position of the piston rod after power failure and can only restart metering length, while the absolute output signal sensor can solve the problem of power failure and memory failure, but the absolute output signal sensor can encode the piston rod of the oil cylinder based on the position of the opening of the arc door, and has complex operation and higher manufacturing cost.
Disclosure of Invention
The invention aims to provide a method for detecting the opening of a radial steel gate of a hydropower station, which effectively solves the problems that a steel wire rope of the existing radial gate built-in stay rope type opening detection method is difficult to replace and the measurement accuracy is reduced after long-time use, and the problem that a piston rod end sensor detection method loses power and memory does not need to carry out complex coding operation on a piston rod of a hydraulic hoist, and has better applicability.
The technical scheme adopted by the invention is that the method for detecting the opening degree of the radial steel gate of the hydropower station comprises the following steps:
Step 1, measuring the linear distance between the end part of a piston rod of a hydraulic hoist and the end part of the gate in a fully closed state in the gate opening and closing process;
and 2, calculating the opening distance of the gate according to the linear distance.
The invention is also characterized in that:
The arc steel gate comprises an arc gate leaf and a hydraulic hoist, wherein the arc gate leaf is hinged with an arc gate support hinge seat through a support arm, the end part of a piston rod of the hydraulic hoist is hinged with the arc gate leaf, and one end of the hydraulic hoist, which is far away from the piston rod, is hinged with the hydraulic hoist support hinge seat.
The calculation method of the step 2 is as follows:
,
Wherein R is the radius of the arc door leaf of the gate, R is the distance from the hinge point of the piston rod of the hydraulic hoist to the center of the arc door hinge seat, L is the linear distance measured in the step 1, θ is the included angle between the bottom edge of the arc door leaf and the connecting line of the arc door hinge seat and the horizontal plane when the arc door leaf is in the fully closed state, and L is the opening distance of the arc door leaf.
The end part of a piston rod of the hydraulic hoist is provided with a distance measuring device.
The distance measuring device comprises a positioning element and a PLC which is in communication connection with the positioning element.
The positioning element is a GPS module.
The beneficial effects of the invention are as follows:
According to the invention, the distance measuring device is arranged at the end part of the hydraulic hoist piston rod, and the linear distance between the end part of the hydraulic hoist piston rod in the gate running state and the gate fully closed state is measured based on the positioning element, so that the opening degree of the radial gate is calculated. The method solves the problems that the pull rope type measuring device is easy to age, the increment type sensor loses power and memory, the absolute type sensor carries out complex marking on the oil cylinder, and the like, and can improve the accuracy of measuring the opening of the arc door to a greater extent and reduce the measuring cost of the opening of the arc door.
Drawings
FIG. 1 is a layout of an arc steel gate and a hydraulic hoist according to embodiment 1 of the present invention;
FIG. 2 is a diagram of the running track of the radial steel gate and the hydraulic hoist of the embodiment 2 of the invention;
FIG. 3 is a radial steel gate opening geometry of example 3 of the present invention;
FIG. 4 is a radial steel gate opening geometry of example 4 of the present invention.
In the figure, 1, an arc door leaf, 2, a hydraulic hoist, 3, a hydraulic hoist support hinged support, 4, an arc door support hinged support, 5, a connecting point (a lower hinge point of a piston rod) of a hydraulic hoist piston rod and the arc door leaf, and 6, a linear distance of the movement of the lower hinge point of the piston rod of the hydraulic hoist.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
Example 1
The utility model provides an arc steel gate device that uses in hydraulic and hydroelectric engineering, as shown in fig. 1, including arc door leaf 1 and hydraulic hoist 2, arc door leaf 1 is connected with arc door prop up hinge seat 4 through the support arm, hydraulic hoist 2's one end is articulated with hydraulic hoist prop up hinge seat 3, hydraulic hoist 2's piston rod tip is articulated with arc door leaf 1, with this hinge point mark for hinge point 5 under the piston rod, distance measuring device is installed to hydraulic hoist 2's piston rod tip, distance measuring device contains the locating element and with the PLC (programmable logic controller) of locating element communication, be used for measuring the linear motion distance of hinge point 5 under the piston rod. And then calculating the opening distance of the arc door leaf 1 according to the linear distance.
Example 2
The utility model provides an arc steel gate device that uses in hydraulic and hydroelectric engineering, as shown in fig. 1, including arc door leaf 1 and hydraulic hoist 2, arc door leaf 1 is connected with arc door prop up hinge seat 4 through the support arm, hydraulic hoist 2's one end is articulated with hydraulic hoist prop up hinge seat 3, hydraulic hoist 2's piston rod tip is articulated with arc door leaf 1, with this hinge point mark for hinge point 5 under the piston rod, distance measuring device is installed to hydraulic hoist 2's piston rod tip, distance measuring device contains the locating element and with the PLC (programmable logic controller) of locating element communication, be used for measuring the linear motion distance of hinge point 5 under the piston rod. And then calculating the opening distance of the arc door leaf 1 according to the linear distance.
In this embodiment the positioning element is a GPS module.
The hydraulic hoist 2 is used for driving the opening and closing of the arc door leaf 1 of the arc steel gate, as shown in fig. 2, the piston rod of the hydraulic hoist 2 contracts to drive the arc door leaf 1to rotate upwards around the arc door hinge seat 4 for opening, and simultaneously the lower hinge point 5 of the piston rod rotates upwards along with the piston rod.
When the arc door leaf 1 is in a fully closed state, the bottom edge of the arc door leaf is in contact with a sill, at the moment, the position of a lower hinge point 5 of a piston rod is set as an end point, when the arc door leaf 1 is opened, a GPS module is used for obtaining the linear distance from the lower hinge point 5 of the piston rod to the end point in real time, the linear distance is marked as the linear distance 6 of the lower hinge point of the piston rod of the hydraulic hoist, which moves, of the piston rod of the hydraulic hoist, the GPS module feeds the linear distance 6 of the lower hinge point of the piston rod of the hydraulic hoist back to a PLC, and the PLC calculates the opening of the arc door leaf 1 according to the linear distance 6 of the lower hinge point of the piston rod of the hydraulic hoist.
Example 3
The utility model provides an arc steel gate device that uses in hydraulic and hydroelectric engineering, as shown in fig. 1, including arc door leaf 1 and hydraulic hoist 2, arc door leaf 1 is connected with arc door prop up hinge seat 4 through the support arm, hydraulic hoist 2's one end is articulated with hydraulic hoist prop up hinge seat 3, hydraulic hoist 2's piston rod tip is articulated with arc door leaf 1, with this hinge point mark for hinge point 5 under the piston rod, distance measuring device is installed to hydraulic hoist 2's piston rod tip, distance measuring device contains the locating element and with the PLC (programmable logic controller) of locating element communication, be used for measuring the linear motion distance of hinge point 5 under the piston rod. And then calculating the opening distance of the arc door leaf 1 according to the linear distance.
The hydraulic hoist 2 is used for driving the opening and closing of the arc door leaf 1 of the arc steel gate, as shown in fig. 2, the piston rod of the hydraulic hoist 2 contracts to drive the arc door leaf 1to rotate upwards around the arc door hinge seat 4 for opening, and simultaneously the lower hinge point 5 of the piston rod rotates upwards along with the piston rod.
When the arc door leaf 1 is in a fully closed state, the bottom edge of the arc door leaf is in contact with a sill, at the moment, the position of a lower hinge point 5 of a piston rod is set as an end point, when the arc door leaf 1 is opened, a positioning element is used for obtaining the linear distance from the lower hinge point 5 of the piston rod to the end point in real time, the distance is marked as the linear distance 6 of the lower hinge point of the piston rod of the hydraulic hoist, which moves, in the embodiment, the positioning element adopts a GPS module, the GPS module feeds back the linear distance 6 of the lower hinge point of the piston rod of the hydraulic hoist to a PLC, and the PLC calculates the opening of the arc door leaf 1 according to the linear distance 6 of the lower hinge point of the piston rod of the hydraulic hoist.
The calculation formula for calculating the opening degree of the arc door leaf 1 in the PLC is obtained in the following way:
as shown in fig. 3, the opening geometry of the arc steel gate device is marked, the center point of rotation of the arc gate leaf 1 around the arc gate hinged support 4 is marked as O, the hinged point of the hydraulic hoist 2 and the hydraulic hoist hinged support 3 is marked as A, the lower hinged point of a piston rod is marked as B when the arc gate leaf is in the all-closed state, meanwhile, the contact point of the bottom edge of the arc gate leaf and the gate sill is marked as D, the lower hinged point of the piston rod is marked as C when the arc gate leaf is in a certain opening position, meanwhile, the projection of the bottom edge of the arc gate leaf on the gate sill is marked as F, the projection of the center point O of the arc gate hinge on the gate sill is marked as G, and O, A, B, D and G are known points (coordinates and Gao Chengjun are known).
The arc door leaf 1 is a rigid body, the arc door leaf 1 rotates around the O point in the opening and closing process, and the arc door leaf bottom edge, the gate sill contact point and the piston rod lower hinge point synchronously rotate around the O point to form two concentric circles.
Therefore, DOE= BOC, OB and OC are distances from the end part B or C of a piston rod of the hydraulic hoist 2 to the center O of the arc door hinge, R is marked as R, the radius OD or OE of the arc door leaf 1 is marked as R, the included angle between the connecting line OD of the bottom edge D of the arc door leaf and the center O of the arc door hinge and the gate sill in the gate fully closed state is marked as theta, R, R and theta are measured, and the three values are constant.
In the opening and closing process of the arc door, a distance measuring device is used for measuring and obtaining the linear distance BC of the movement of the lower hinge point of the piston rod, and the linear distance BC is recorded as L.
From the cosine law:
Because, delta OBC-delta ODE;
So that the number of the parts to be processed, ,∠EDF=π-∠ODE-∠ODG=π-∠ODE-θ;
In the right triangle Δdfe, EF is the opening distance of the arc gate, which is marked as l,
。
Example 4
As shown in fig. 4, the radius R of an arc door leaf of a certain hydropower station is measured to be 21000.00mm, the distance R from the end part of a piston rod of a hydraulic hoist to the center of a support hinge of the arc door is measured to be 15640.00mm, the included angle theta between the connecting line of the bottom edge of the arc door leaf and the center of the support hinge of the arc door and the horizontal plane is 26.0428 degrees when the gate is in a fully closed state, and the opening of the arc door is actually measured to be 3936.15mm when the linear distance L of the movement of a lower hinge point of the piston rod is 3125.79 mm.
R, r, θ, and L are taken into the calculation in example 3The opening distance l= 3936.15mm of the arc door is calculated, and the calculation result is consistent with the actual measurement result, so that the method is accurate in result and simpler to operate.
Example 5
A three-dimensional model of the steel gate is created by using CATIA, the key size is marked, wherein the radius R of an arc gate leaf is 21000.00mm, the distance R from the end part of a piston rod of the hydraulic hoist to the center of a support hinge of the arc gate is 15640.00mm, and the included angle theta between the bottom edge of the arc gate leaf and the center line of the support hinge of the arc gate and the horizontal plane is 26.0428 degrees when the gate is in a fully closed state.
And writing a script in MATLAB, simulating the movement process of the steel gate from the full closure to a certain opening position, recording the straight line distance L of the movement of the hinge point of the piston rod as 1617.00mm, and actually measuring the opening of the arc gate as 1997.38mm.
R, r, θ, and L are taken into the calculation in example 3The opening distance l= 1997.38mm of the arc door is calculated, and the calculation result is consistent with the actual measurement result.
Example 6
A three-dimensional model of the steel gate is created by using CATIA, the key size is marked, wherein the radius R of an arc gate leaf is 18000.00mm, the distance R from the end part of a piston rod of the hydraulic hoist to the center of a support hinge of the arc gate is 16000.00mm, and the included angle theta between the bottom edge of the arc gate leaf and the center line of the support hinge of the arc gate and the horizontal plane is 34.0925 degrees when the gate is in a fully closed state.
And writing a script in MATLAB, simulating the movement process of the steel gate from the full closure to a certain opening position, recording the straight line distance L of the movement of the hinge point of the piston rod as 1916.04mm, and actually measuring the opening of the arc gate as 1854.22mm.
R, r, θ, and L are taken into the calculation in example 3The opening distance l= 1854.22mm of the arc door is calculated, and the calculation result is consistent with the actual measurement result.
According to the invention, the distance measuring device is arranged at the end part of the hydraulic hoist piston rod, and the linear distance between the end part of the hydraulic hoist piston rod in the gate running state and the gate fully closed state is measured based on the positioning element, so that the opening degree of the radial gate is calculated. The method solves the problems that the pull rope type measuring device is easy to age, the increment type sensor loses power and memory, the absolute type sensor carries out complex marking on the oil cylinder, and the like, and can improve the accuracy of measuring the opening of the arc door to a greater extent and reduce the measuring cost of the opening of the arc door.
Claims (6)
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| CN202510309439.0A CN119803260B (en) | 2025-03-17 | 2025-03-17 | Hydropower station arc steel gate opening detection method |
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| CN202510309439.0A CN119803260B (en) | 2025-03-17 | 2025-03-17 | Hydropower station arc steel gate opening detection method |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09257153A (en) * | 1996-03-21 | 1997-09-30 | Japan Steel Works Ltd:The | Actuator for valves and gates |
| CN102022968A (en) * | 2010-12-24 | 2011-04-20 | 长江水利委员会长江勘测规划设计研究院 | Gate opening detection device |
| CN107727030A (en) * | 2017-10-09 | 2018-02-23 | 合肥灵猫传媒有限公司 | A kind of arrangements for automotive doors opening detection method and device |
| US20180363541A1 (en) * | 2016-03-08 | 2018-12-20 | Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | Surge avoidance control method and surge avoidance control device for exhaust turbine turbocharger |
| CN110704988A (en) * | 2019-10-24 | 2020-01-17 | 江苏泽隆自动化工程有限公司 | Hydraulic arc door opening value calculating device |
| KR20210121529A (en) * | 2020-03-30 | 2021-10-08 | (주)성림엠엔씨 | An Apparatus for measuring radial gate opening position using two absolute encoders |
| CN116118259A (en) * | 2022-11-21 | 2023-05-16 | 中国电建集团贵阳勘测设计研究院有限公司 | Accurate determination method for technical parameters and arrangement size of swing type hydraulic machine |
| CN116289805A (en) * | 2023-03-31 | 2023-06-23 | 华能澜沧江水电股份有限公司 | Curved steel gate and its opening detection method |
| CN118463903A (en) * | 2024-04-25 | 2024-08-09 | 中国长江电力股份有限公司 | Method for measuring opening degree of arc door of hydraulic hoist |
| KR102746565B1 (en) * | 2024-03-26 | 2024-12-24 | (주)성림엠엔씨 | An Apparatus for measuring digital gate opening position using absolute encoder |
-
2025
- 2025-03-17 CN CN202510309439.0A patent/CN119803260B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09257153A (en) * | 1996-03-21 | 1997-09-30 | Japan Steel Works Ltd:The | Actuator for valves and gates |
| CN102022968A (en) * | 2010-12-24 | 2011-04-20 | 长江水利委员会长江勘测规划设计研究院 | Gate opening detection device |
| US20180363541A1 (en) * | 2016-03-08 | 2018-12-20 | Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | Surge avoidance control method and surge avoidance control device for exhaust turbine turbocharger |
| CN107727030A (en) * | 2017-10-09 | 2018-02-23 | 合肥灵猫传媒有限公司 | A kind of arrangements for automotive doors opening detection method and device |
| CN110704988A (en) * | 2019-10-24 | 2020-01-17 | 江苏泽隆自动化工程有限公司 | Hydraulic arc door opening value calculating device |
| KR20210121529A (en) * | 2020-03-30 | 2021-10-08 | (주)성림엠엔씨 | An Apparatus for measuring radial gate opening position using two absolute encoders |
| CN116118259A (en) * | 2022-11-21 | 2023-05-16 | 中国电建集团贵阳勘测设计研究院有限公司 | Accurate determination method for technical parameters and arrangement size of swing type hydraulic machine |
| CN116289805A (en) * | 2023-03-31 | 2023-06-23 | 华能澜沧江水电股份有限公司 | Curved steel gate and its opening detection method |
| KR102746565B1 (en) * | 2024-03-26 | 2024-12-24 | (주)성림엠엔씨 | An Apparatus for measuring digital gate opening position using absolute encoder |
| CN118463903A (en) * | 2024-04-25 | 2024-08-09 | 中国长江电力股份有限公司 | Method for measuring opening degree of arc door of hydraulic hoist |
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