CN215598349U - Quick opening measuring device for water inlet of giant hydroelectric generating set - Google Patents
Quick opening measuring device for water inlet of giant hydroelectric generating set Download PDFInfo
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- CN215598349U CN215598349U CN202121179809.7U CN202121179809U CN215598349U CN 215598349 U CN215598349 U CN 215598349U CN 202121179809 U CN202121179809 U CN 202121179809U CN 215598349 U CN215598349 U CN 215598349U
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Abstract
A rapid opening measuring device for a water inlet of a giant hydroelectric generating set comprises a hydraulic cylinder, a piston rod in the hydraulic cylinder is fixedly connected with a gate, the other end of the piston rod is connected with a traction rope, a support pulley is arranged on a base beside the gate, the traction rope crosses the support pulley and is connected with a stroke detection device on the base, an encoder is arranged on the stroke detection device, a tooth-shaped belt is driven by the lifting motion of the gate through the traction rope and the support pulley connected with the piston rod to drive a gear to rotate, so that the encoder is driven to rotate, the rotation angle of the encoder is accurately converted into an accurate value of the opening degree of the gate through PLC calculation, the accuracy can be greatly improved due to the matching of the tooth-shaped belt wheels, a stroke switch can perform alarm control on the limit position of the gate, and the opening degree can be transmitted to an LCU in real time through the PLC to realize the closed-loop control of the hydraulic cylinder, the lifting speed, the acceleration and the opening degree of the gate can be accurately controlled.
Description
Technical Field
The utility model relates to the field of hydropower station equipment control, in particular to a device for measuring the opening of a water inlet quick valve of a giant water turbine generator set.
Background
The hydraulic hoist is usually used for controlling the gate of the hydropower station flood discharge facility due to stable and reliable control, the gate opening is one of main parameters for controlling the gate of the flood discharge facility by the hydraulic hoist, the gate opening is directly related to the control of the hydropower station flood discharge flow, and the stability and the reliability of a sampling value directly influence the control of the gate and the safe and stable operation of a dam. Therefore, the detection of the gate opening of the hydraulic hoist is very necessary and reliable and accurate.
At present, the gate form of the hydraulic hoist at the water inlet of the unit adopts a flat plate shape, and the measurement of the gate opening degree has certain problems. Firstly, gate one side is soaked under water for a long time, and is higher to sensor performance requirement, because gate length ratio is longer, does not have such ripe product and the device of direct detection gate yet. And secondly, the opening degree of a water inlet gate directly participates in unit control, the adjustment of a water head and active power of the unit is directly influenced, and the requirement on the measurement precision is higher.
Disclosure of Invention
The utility model aims to provide a device for measuring the opening degree of a water inlet of a giant hydroelectric generating set quickly, which can accurately measure the opening degree value of an inlet gate of a hydropower station and apply the opening degree value to the lifting closed-loop control of a gate pricing hydraulic cylinder.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
the utility model provides a quick door opening measuring device of giant hydroelectric set water inlet, includes the pneumatic cylinder, piston rod and gate fixed connection in the pneumatic cylinder, the piston rod other end is connected with the haulage rope, be equipped with the supporting pulley on the other base of gate, the haulage rope strides across the supporting pulley and is connected with the stroke detection device on the base, be equipped with the encoder on the stroke detection device, when the piston rod in pneumatic cylinder elevating movement drives the gate, drive the synchronous rotation of encoder through stroke detection device, the encoder detects the aperture that pivoted accumulation angle can learn the gate.
The stroke detection device is electrically connected with an input end of the PLC, the PLC is electrically connected with the HMI human-computer interaction screen, the opening display instrument and the LCU site control unit, and the PLC receives the encoder rotation angle numerical value transmitted by the stroke detection device, calculates the opening of the gate and transmits the gate opening to the LCU site control unit for closed-loop control of the hydraulic cylinder.
The stroke detection device is positioned on one side, far away from the gate, of the base and comprises a support frame fixedly connected with the base, a synchronous toothed wheel in rotating connection is arranged on the support frame, an encoder is fixedly connected with one side of the support frame, a rotating shaft of the encoder is fixed with the synchronous toothed wheel, a synchronous toothed belt is meshed with the synchronous toothed wheel and is fixedly connected with a traction rope at the front end, the other end of the synchronous toothed belt is fixedly connected with a vertically placed balance weight, and the balance weight is placed in the guide hole and is in sliding contact with the guide hole.
The traction rope is provided with a signaling block between the supporting pulley and the synchronous cog belt, and the upper end of the base is provided with travel switches at two ends of the signaling block.
The output end of the PLC is electrically connected with the alarm lamp post.
And an isolation transmitter is arranged between the PLC and the HMI human-computer interaction screen, between the opening display instrument and between the PLC and the HMI human-computer interaction screen and between the opening display instrument and the LCU local control unit.
According to the device for measuring the opening of the water inlet of the giant hydroelectric generating set, the lifting motion of the gate pulls the toothed belt to drive the toothed wheel to rotate through the traction rope and the support pulley which are connected through the piston rod, so that the encoder is driven to rotate, the rotation angle of the encoder is accurately converted into the accurate value of the opening of the gate through the calculation of the PLC, the accuracy can be greatly improved due to the matching of the toothed belt wheels, the travel switch can perform alarm control on the limit position of the gate, the opening value can be transmitted to the LCU in real time through the PLC to achieve closed-loop control of the hydraulic cylinder, and the lifting speed, the acceleration and the opening of the gate can be precisely controlled.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic view of the structural connection of the present invention;
FIG. 2 is an enlarged partial schematic view of FIG. 1;
fig. 3 is a schematic diagram of the gate opening measurement control.
In the figure: the device comprises a PLC (programmable logic controller) 1, a stroke detection device 2, a support frame 21, a synchronous toothed belt 22, a synchronous toothed wheel 23, an encoder 24, an alarm lamp post 3, an HMI (human machine interface) man-machine interaction screen 4, an isolation transmitter 5, an opening display instrument 6, a power supply conversion module 7, an LCU (liquid crystal unit) local control unit 8, a piston rod 9, a stroke switch 10, a gate 11, a base 12, a support pulley 13, a traction rope 14, a signaling block 15, a guide hole 16, a balance weight 17 and a hydraulic cylinder 18.
Detailed Description
As shown in fig. 1-3, a rapid opening degree measuring device for a water inlet of a giant hydroelectric generating set comprises a hydraulic cylinder 18, a piston rod 9 in the hydraulic cylinder 18 is fixedly connected with a gate 11, the other end of the piston rod 9 is connected with a traction rope 14, a support pulley 13 is arranged on a base 12 beside the gate 11, the traction rope 14 crosses the support pulley 13 and is connected with a stroke detection device 2 on the base 12, an encoder 24 is arranged on the stroke detection device 2, the piston rod 9 moves up and down in the hydraulic cylinder 18 to drive the gate 11, meanwhile, the encoder 24 is driven by the stroke detection device 2 to synchronously rotate, and the encoder 24 detects the accumulated rotating angle to know the opening degree of the gate 11.
The stroke detection device 2 is electrically connected with an input end of the PLC controller 1, the PLC controller 1 is electrically connected with the HMI human-machine interaction screen 4, the opening display instrument 6 and the LCU local control unit 8, the PLC controller 1 receives a rotation angle value of an encoder 24 transmitted by the stroke detection device 2, calculates the opening of a gate, sends the gate to the LCU local control unit 8 to perform closed-loop control on the hydraulic cylinder 18, calculates the opening speed and acceleration of the gate through the real-time opening received by the LCU local control unit 8, and performs closed-loop regulation on the oil pressure flow of the hydraulic cylinder 18 through a servo valve.
The stroke detection device 2 is positioned on one side of the base 12 far away from the gate 11 and comprises a support frame 21 fixedly connected with the base 12, a synchronous toothed wheel 23 in rotating connection is arranged on the support frame 21, an encoder 24 is fixedly connected with one side of the support frame 21, a rotating shaft of the encoder 24 is fixed with the synchronous toothed wheel 23, a synchronous toothed belt 22 is meshed with the synchronous toothed wheel 23 and is fixedly connected with a traction rope 14 at the front end, the other end of the synchronous toothed belt 22 is fixedly connected with a vertically placed balance weight 17, the balance weight 17 is placed in a guide hole 16 and is in sliding contact with the guide hole 16, and balance is carried out through the self weight of the balance weight 17 and the gate 11, so that the force of the hydraulic cylinder 18 for drawing the gate 11 is greatly smaller, the size of the hydraulic cylinder 18 is reduced, the cost is reduced, and the energy consumption is reduced.
The above-mentioned haulage rope 14 is equipped with the signalling block 15 between supporting pulley 13 and synchronous cog belt 22, the base 12 upper end is equipped with travel switch 10 at the both ends of signalling block 15, through travel switch 10 to the gate limit position restriction.
The output end of the PLC controller 1 is electrically connected with the alarm lamp post 3, and when the output end of the PLC controller 1 exceeds the limit position, the PLC controller 1 outputs an alarm.
An isolation transmitter 5 is arranged between the PLC controller 1 and the HMI human-machine interaction screen 4, the opening display instrument 6 and the LCU local control unit 8, and the anti-interference capability can be improved through the isolation transmitter 5.
The above-mentioned HMI man-machine interaction screen 4 employs the schneider series HMI ST 6600.
The opening display instrument 6 adopts the rainbow NHR-1100.
Claims (6)
1. A rapid opening degree measuring device for a water inlet of a giant hydroelectric generating set is characterized in that: including pneumatic cylinder (18), piston rod (9) and gate (11) fixed connection in pneumatic cylinder (18), piston rod (9) other end is connected with haulage rope (14), be equipped with supporting pulley (13) on gate (11) other base (12), haulage rope (14) stride supporting pulley (13) and are connected with stroke detection device (2) on base (12), be equipped with encoder (24) on stroke detection device (2), when piston rod (9) elevating movement drove gate (11) in pneumatic cylinder (18), drive encoder (24) synchronous revolution through stroke detection device (2), encoder (24) detect the aperture that pivoted accumulation angle can learn gate (11).
2. The device for measuring the rapid opening degree of the water inlet of the giant water turbine generator set according to claim 1, wherein the stroke detection device (2) is electrically connected with an input end of a PLC (programmable logic controller) (1), the PLC (1) is electrically connected with an HMI (human machine interface) screen (4), an opening degree display instrument (6) and an LCU (local control Unit) (8), and the PLC (1) receives a rotation angle value of an encoder (24) transmitted by the stroke detection device (2), calculates the opening degree of a gate, and transmits the gate opening degree value to the LCU local control unit (8) to perform closed-loop control on a hydraulic cylinder (18).
3. The device for measuring the rapid opening degree of the water inlet of the giant hydroelectric generating set according to claim 2, wherein the stroke detection device (2) is positioned on one side of the base (12) far away from the gate (11) and comprises a support frame (21) fixedly connected with the base (12), a synchronous toothed wheel (23) in rotary connection is arranged on the support frame (21), an encoder (24) is fixedly connected with one side of the support frame (21), a rotating shaft of the encoder (24) is fixed with the synchronous toothed wheel (23), a synchronous toothed belt (22) is meshed and connected with the synchronous toothed wheel (23) and is fixedly connected with a traction rope (14) at the front end, the other end of the synchronous toothed belt (22) is fixedly connected with a vertically-arranged balance weight (17), and the balance weight (17) is arranged in the guide hole (16) and is in sliding contact with the guide hole (16).
4. The device for measuring the opening degree of the water inlet of the giant hydroelectric generating set according to claim 2, wherein the pull rope (14) is provided with a signaling block (15) between the supporting pulley (13) and the synchronous cog belt (22), and the upper end of the base (12) is provided with travel switches (10) at two ends of the signaling block (15).
5. The device for measuring the rapid opening degree of the water inlet of the giant water-turbine generator set according to claim 4, wherein the output end of the PLC (1) is electrically connected with the alarm lamppost (3).
6. The device for measuring the rapid opening degree of the water inlet of the giant water turbine generator set according to claim 5, wherein an isolation transmitter (5) is arranged among the PLC controller (1), the HMI human-machine interaction screen (4), the opening degree display instrument (6) and the LCU local control unit (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121179809.7U CN215598349U (en) | 2021-05-30 | 2021-05-30 | Quick opening measuring device for water inlet of giant hydroelectric generating set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121179809.7U CN215598349U (en) | 2021-05-30 | 2021-05-30 | Quick opening measuring device for water inlet of giant hydroelectric generating set |
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| Publication Number | Publication Date |
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| CN215598349U true CN215598349U (en) | 2022-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121179809.7U Active CN215598349U (en) | 2021-05-30 | 2021-05-30 | Quick opening measuring device for water inlet of giant hydroelectric generating set |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114838922A (en) * | 2022-04-06 | 2022-08-02 | 中国长江电力股份有限公司 | Power station flat gate state detection device |
| CN116661368A (en) * | 2023-06-05 | 2023-08-29 | 华能澜沧江水电股份有限公司 | Dual-redundancy channel gate opening acquisition method and device |
-
2021
- 2021-05-30 CN CN202121179809.7U patent/CN215598349U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114838922A (en) * | 2022-04-06 | 2022-08-02 | 中国长江电力股份有限公司 | Power station flat gate state detection device |
| CN116661368A (en) * | 2023-06-05 | 2023-08-29 | 华能澜沧江水电股份有限公司 | Dual-redundancy channel gate opening acquisition method and device |
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