CN111501684A - Anti-falling method after lifting flood gate - Google Patents
Anti-falling method after lifting flood gate Download PDFInfo
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- CN111501684A CN111501684A CN202010348491.4A CN202010348491A CN111501684A CN 111501684 A CN111501684 A CN 111501684A CN 202010348491 A CN202010348491 A CN 202010348491A CN 111501684 A CN111501684 A CN 111501684A
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- flood
- gate
- frequency converter
- output voltage
- flood gate
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Barrages (AREA)
Abstract
The invention discloses a falling prevention method after a flood gate is lifted, which comprises the following steps: monitoring an opening signal of a flood overflow gate and output voltage of a frequency converter in a flood overflow gate hoist to obtain an opening signal measured value and an output voltage measured value of the frequency converter; secondly, calculating the falling speed of the flood gate according to the opening signal measurement value; thirdly, according to the output voltage measurement value of the frequency converter or the falling speed of the flood gate, making a corresponding operation flow; when the output voltage measuring value of the frequency converter is more than or equal to 35V and the falling speed of the flood gate is less than 0.03m/s, the flood gate performs a normal ascending or descending operation process; when the measured value of the output voltage of the frequency converter is less than 35V, starting to reset the operation flows of releasing the safety brake and exiting the ascending or descending operation of the flood gate, and outputting an alarm statement; and when the falling speed of the flood gate is more than or equal to 0.03m/s, starting the flood gate to stop the operation process. The invention can pre-judge the anti-falling fault after the overflow door is lifted, and reduce the potential safety hazard in the flood control and flood prevention and production processes.
Description
Technical Field
The invention relates to a flood gate monitoring system, in particular to a falling prevention method after a flood gate is lifted.
Background
The hydropower station is a comprehensive engineering facility capable of converting water energy into electric energy; the water diversion system is generally composed of a reservoir formed by water retaining and releasing buildings, a water diversion system of a hydropower station, a power generation plant, electromechanical equipment and the like. The water discharge structure refers to a structure for discharging flood or emptying reservoirs, such as an open bank spillway, an overflow dam, a flood discharge tunnel, a water discharge bottom hole and the like. The spillway of a hydraulic power plant is usually provided with a radial gate, the radial gate is a gate with a cylindrical water retaining surface and a partial arc surface, a supporting hinge of a supporting arm of the radial gate is positioned at the center of a circle, the gate rotates around the supporting hinge when the radial gate is opened and closed, and the radial gate consists of a rotating door body, an embedded member and an opening and closing device; the opening and closing device adopts a fixed winch type opening and closing machine and is arranged on a bent frame beam above the radial gate. The arc gate hoist comprises a winding drum device, a steel wire rope, a balance hanger, an open gear device, a working and safety brake, a speed reducer, a motor, a height detection device, a load detection and limiting device, a rack and other accessories. Along with the increase of the service time of the device, the overflow door may fall after being lifted, and the existing overflow door only monitors and judges the control power supply of the overflow door and the control power supply of the frequency converter in the processes of rising, falling and stopping related operation control, so that the falling of the overflow door after rising cannot be pre-judged, and great hidden dangers exist in flood control and flood prevention and safety production. Therefore, a method for preventing the overflow door from falling after being lifted is urgently needed to reduce the potential safety hazard.
Disclosure of Invention
The invention aims to provide a falling prevention method after a flood discharge gate is lifted. The invention can pre-judge the anti-falling fault after the overflow door is lifted, and reduce the potential safety hazard in the flood control and flood prevention and production processes.
The technical scheme of the invention is as follows: a falling prevention method after a flood gate is lifted comprises the following steps:
monitoring an opening signal of a flood overflow gate and output voltage of a frequency converter in a flood overflow gate hoist to obtain an opening signal measured value and an output voltage measured value of the frequency converter;
secondly, calculating the falling speed of the flood gate according to the opening signal measurement value;
thirdly, according to the output voltage measurement value of the frequency converter or the falling speed of the flood gate, making a corresponding operation flow;
when the output voltage measuring value of the frequency converter is more than or equal to 35V and the falling speed of the flood gate is less than 0.03m/s, the flood gate performs a normal ascending or descending operation process;
when the measured value of the output voltage of the frequency converter is less than 35V, starting to reset the operation flows of releasing the safety brake and exiting the ascending or descending operation of the flood gate, and outputting an alarm statement;
and when the falling speed of the flood gate is more than or equal to 0.03m/s, starting the flood gate to stop the operation process.
In the above method for preventing the flood gate from falling after lifting, the second step is to calculate the falling speed of the flood gate as follows: setting the measured value of the flood overflow door opening signal before descending as H1 and corresponding time t 1; after the flood spills are descended, the signal measured value H2 and the corresponding time t2 are obtained; the flood gate falling speed V is (H1-H2)/(t2-t 1).
In the above method for preventing the flood gate from falling after being lifted, the stop operation process of the flood gate is as follows:
A. sending a command by a touch screen or an upper computer;
B. stopping the value setting starting process;
C. stopping the full closing process of the flood gate;
D. stopping the full-opening process of the flood overflowing door;
E. the return flood overflow gate is lifted out;
F. returning the spillway gate to descend out;
G. resetting and releasing the safety brake to open;
H. and setting zero clearing.
Compared with the prior art, the method has the advantages that the effect of preventing the flood overflow gate from falling after being lifted is realized by modifying and optimizing the lifting control flow of the flood overflow gate; through detecting the aperture signal to the flood discharge door and the converter output voltage in the flood discharge door headstock gear, rationally add judgment condition (flood discharge door falling speed and converter output voltage), carry out the analysis and judgment to the state of overflow door, the realization takes place to prevent after the overflow door promotes that the phenomenon of falling the trouble is prejudged, the effect of falling after preventing that the flood discharge door promotes has not only been played, more make the judgement that the fortune examines personnel can be clear accurate to equipment operation conditions, also reduced the work degree of difficulty in the intangible, on-the-spot defect rate has been reduced simultaneously, reduce the potential safety hazard, the unit safety has been ensured, and is stable, economic operation, and good social benefit has. In conclusion, the anti-falling fault pre-judging device can pre-judge the anti-falling fault after the overflow door is lifted, and reduce the potential safety hazard in the flood control and flood prevention and production processes.
Drawings
FIG. 1 is a flow chart of the operation of the flood gate raising process of the present invention;
fig. 2 is a flow chart of the flood gate stop operation flow of the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Examples are given. A method for preventing falling after lifting a spillway gate is disclosed as shown in figures 1 and 2, and comprises the following steps:
monitoring an opening signal of a flood overflow gate and output voltage of a frequency converter in a flood overflow gate hoist to obtain an opening signal measured value and an output voltage measured value of the frequency converter;
secondly, calculating the falling speed of the flood gate according to the opening signal measurement value;
thirdly, according to the output voltage measurement value of the frequency converter or the falling speed of the flood gate, making a corresponding operation flow;
when the output voltage measuring value of the frequency converter is more than or equal to 35V and the falling speed of the flood gate is less than 0.03m/s, the flood gate performs a normal ascending or descending operation process;
when the measured value of the output voltage of the frequency converter is less than 35V, starting to reset the operation flows of releasing the safety brake and exiting the ascending or descending operation of the flood gate, and outputting an alarm statement;
the alarm statement is "alarm: frequency converter fault "
And when the falling speed of the flood gate is more than or equal to 0.03m/s, starting the flood gate to stop the operation process.
In the process of ascending or descending operation of the flood spillway gate, when the quality of the flood spillway gate is good, the control power supply is normal and is in a normal position, the monitoring process executes the operation of loosening the safety brake, after 5s of delay, the brake is loosened, the power supply of the frequency converter is put into use, after 5s of delay, if the frequency converter of the flood spillway gate has no fault, the ascending or descending operation of the flood spillway gate is carried out; if the condition is not met by any judgment in the middle, a corresponding alarm statement is output, the operations of 'releasing the safety brake' and 'rising (descending) the flood gate' are reset, and the process exits.
The method for calculating the falling speed of the flood gate in the second step comprises the following steps: setting the measured value of the flood overflow door opening signal before descending as H1 and corresponding time t 1; after the flood spills are descended, the signal measured value H2 and the corresponding time t2 are obtained; the flood gate falling speed V is (H1-H2)/(t2-t 1).
The stop operation flow of the flood overflow gate comprises the following steps:
A. sending a command by a touch screen or an upper computer;
B. stopping the value setting starting process;
C. stopping the full closing process of the flood gate;
D. stopping the full-opening process of the flood overflowing door;
E. the return flood overflow gate is lifted out;
F. returning the spillway gate to descend out;
G. resetting and releasing the safety brake to open;
H. and setting zero clearing.
A flood overflow gate anti-falling device comprises an arc-shaped flood overflow gate, wherein support arms are arranged at two ends of the inner side of the arc-shaped flood overflow gate, supporting hinge assemblies are arranged at the end parts of the support arms, lifting lugs are arranged at two ends of the bottom of the arc-shaped flood overflow gate, the lifting lugs are connected with a winch hoist through steel wire ropes, the winch hoist comprises a rack, a motor is arranged on the rack, a brake and a speed reducer are arranged on an output shaft of the motor, and the speed reducer is connected with a; the hoisting hoist further comprises a winding drum, the transmission gear is fixed at one end of the winding drum, and a locking mechanism is arranged at the other end of the winding drum.
The locking mechanism comprises a fixed seat, guide sliding rods are arranged on two sides of the fixed seat, sliding blocks are arranged on the guide sliding rods, springs are sleeved on the guide sliding rods, and limiting rods are arranged at the upper ends of the sliding blocks; the inner side end of the sliding block is provided with a magnet, and the fixed seat is provided with an electromagnet matched with the magnet; the spring is positioned between the sliding block and the electromagnet.
And a limiting notch is arranged on the circumferential surface of the other end of the winding drum and matched with the limiting rod.
The two ends of the lower end surface of the arc flood discharge gate are provided with a sewage disposal push plate.
The invention also improves the hoisting type opening and closing device, and the motor output shaft and the winding drum are respectively braked through the mutual matching of the brake and the locking mechanism, so that double braking is realized, and the flood gate can be effectively prevented from falling. The electromagnet and the attracting magnet are matched with each other, the corresponding action of the attracting magnet is controlled by the on-off of the electromagnet and the spring, and the limiting and fixing of the winding drum are further completed.
Claims (3)
1. A falling prevention method after a flood gate is lifted is characterized by comprising the following steps:
monitoring an opening signal of a flood overflow gate and output voltage of a frequency converter in a flood overflow gate hoist to obtain an opening signal measured value and an output voltage measured value of the frequency converter;
secondly, calculating the falling speed of the flood gate according to the opening signal measurement value;
thirdly, according to the output voltage measurement value of the frequency converter or the falling speed of the flood gate, making a corresponding operation flow;
when the output voltage measuring value of the frequency converter is more than or equal to 35V and the falling speed of the flood gate is less than 0.03m/s, the flood gate performs a normal ascending or descending operation process;
when the measured value of the output voltage of the frequency converter is less than 35V, starting to reset the operation flows of releasing the safety brake and exiting the ascending or descending operation of the flood gate, and outputting an alarm statement;
and when the falling speed of the flood gate is more than or equal to 0.03m/s, starting the flood gate to stop the operation process.
2. The method of claim 1, wherein the fall speed of the flood gate in the second step is calculated by: setting the measured value of the flood overflow door opening signal before descending as H1 and corresponding time t 1; after the flood spills are descended, the signal measured value H2 and the corresponding time t2 are obtained; the flood gate falling speed V is (H1-H2)/(t2-t 1).
3. The method for preventing the flood gate from falling after being lifted according to claim 1, wherein the flood gate stopping operation process comprises the following steps:
A. sending a command by a touch screen or an upper computer;
B. stopping the value setting starting process;
C. stopping the full closing process of the flood gate;
D. stopping the full-opening process of the flood overflowing door;
E. the return flood overflow gate is lifted out;
F. returning the spillway gate to descend out;
G. resetting and releasing the safety brake to open;
H. and setting zero clearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010348491.4A CN111501684B (en) | 2020-04-28 | 2020-04-28 | Anti-falling method after lifting flood gate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010348491.4A CN111501684B (en) | 2020-04-28 | 2020-04-28 | Anti-falling method after lifting flood gate |
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| Publication Number | Publication Date |
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| CN111501684A true CN111501684A (en) | 2020-08-07 |
| CN111501684B CN111501684B (en) | 2021-11-05 |
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| CN202010348491.4A Active CN111501684B (en) | 2020-04-28 | 2020-04-28 | Anti-falling method after lifting flood gate |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202693417U (en) * | 2012-06-29 | 2013-01-23 | 公安部上海消防研究所 | Performance test device used for detecting anti-falling equipment for fire protection |
| CN203568750U (en) * | 2013-08-28 | 2014-04-30 | 中国葛洲坝集团机械船舶有限公司 | Overspeed-preventing control device of gantry hoist lifting mechanism |
| JP6090584B2 (en) * | 2013-12-12 | 2017-03-08 | Ｊｆｅスチール株式会社 | Sluice opening control system |
| CN109443424A (en) * | 2018-10-12 | 2019-03-08 | 湖北工业大学 | A kind of arc open-close sluice gate status monitoring and error comprehensive diagnosis method |
| CN110177917A (en) * | 2017-02-09 | 2019-08-27 | 艾富来高速安全门有限公司 | For detecting the equipment, system and method for door leaf fallen |
| CN110308711A (en) * | 2019-04-25 | 2019-10-08 | 四川中鼎智能技术有限公司 | Diagnosis control method, system, storage medium and terminal based on gate of hydropower station aperture data procedures |
-
2020
- 2020-04-28 CN CN202010348491.4A patent/CN111501684B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202693417U (en) * | 2012-06-29 | 2013-01-23 | 公安部上海消防研究所 | Performance test device used for detecting anti-falling equipment for fire protection |
| CN203568750U (en) * | 2013-08-28 | 2014-04-30 | 中国葛洲坝集团机械船舶有限公司 | Overspeed-preventing control device of gantry hoist lifting mechanism |
| JP6090584B2 (en) * | 2013-12-12 | 2017-03-08 | Ｊｆｅスチール株式会社 | Sluice opening control system |
| CN110177917A (en) * | 2017-02-09 | 2019-08-27 | 艾富来高速安全门有限公司 | For detecting the equipment, system and method for door leaf fallen |
| CN109443424A (en) * | 2018-10-12 | 2019-03-08 | 湖北工业大学 | A kind of arc open-close sluice gate status monitoring and error comprehensive diagnosis method |
| CN110308711A (en) * | 2019-04-25 | 2019-10-08 | 四川中鼎智能技术有限公司 | Diagnosis control method, system, storage medium and terminal based on gate of hydropower station aperture data procedures |
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| CN111501684B (en) | 2021-11-05 |
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