CN219301844U - Water pump turbine top cap bolt stress monitoring system - Google Patents
Water pump turbine top cap bolt stress monitoring system Download PDFInfo
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- CN219301844U CN219301844U CN202223189781.2U CN202223189781U CN219301844U CN 219301844 U CN219301844 U CN 219301844U CN 202223189781 U CN202223189781 U CN 202223189781U CN 219301844 U CN219301844 U CN 219301844U
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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
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Abstract
The utility model relates to a system for monitoring the stress of a top cover bolt of a water pump turbine, which aims to solve the problem that inaccurate measurement possibly occurs in the process of measuring the stress of the top cover bolt of the water pump turbine in the prior art. The technical scheme of the utility model is as follows: the top cover pressure measuring module is used for measuring the pressure born by each key measuring point of the top cover; the top cover bolt stress measuring module is used for measuring the stress of the top cover bolt; the PLC I is electrically connected with the top cover pressure measurement module; the PLC II is electrically connected with the PLC I and is used for calculating the theoretical stress of the top cover bolt based on the top cover load calculated by the PLC I; the PLC III is electrically connected with the top cover bolt stress measurement module; the PLC IV is electrically connected with the PLC II and the PLC III; and the alarm module is electrically connected with the PLC IV and is used for giving an alarm when the PLC IV generates an alarm signal. The utility model is suitable for the technical field of pumped storage units.
Description
Technical Field
The utility model relates to a system for monitoring the stress of a top cover bolt of a water pump turbine. Is applicable to the technical field of pumped storage units.
Background
Pumped storage is a green low-carbon clean flexible regulating power supply of the power system with the largest large-scale development condition at present, and is an important way for guaranteeing the safe and stable operation of the power system. Not only can the new energy consumption be effectively promoted, but also the balance adjustment capability of the power system can be enhanced.
The pumped storage power station unit is frequently started and has complex operation conditions. The high-pressure water flow is passed through between the main pressure-bearing member top cover of water pump hydroturbine and the seat ring, and the connection design of the two directly relates to the safety of runner. The connecting bolt between the top cover and the seat ring mainly bears the load of the internal high-pressure water flow on the top cover, if the load is too large, the bolt is easy to break, so that the sealing between the top cover and the seat ring fails, a large amount of water burst can be brought into a factory building, a factory building accident is caused, and serious loss is brought to the life safety of a power station and personnel. In recent years, accidents caused by the breakage of roof bolts of hydropower stations at home and abroad occur, and the safety of personnel and property of the hydropower station is seriously threatened. Therefore, how to accurately monitor the stress condition of the top cover bolt is important for the safe operation of the water pump turbine.
At present, stress monitoring of a top cover bolt mainly comprises a stress sheet method, a strain gauge method, an ultrasonic method and the like, and the stress condition of the bolt is measured mainly by installing the stress sheet, the strain gauge or an ultrasonic probe on the bolt, so that the stress state of the bolt is reflected. The methods have certain limitations in the application process, such as difficult installation in certain occasions of the stress sheet method; the stress meter method often needs to be buried in the bolt in advance, a mounting hole needs to be reserved in advance in the production process of the bolt, and the application of the method in an established power station is limited; the ultrasonic method has higher calibration requirements on a measuring system. Therefore, the single measurement system described above may affect the measurement result of the bolt stress due to the limitation of the installation of the monitoring device or the malfunction of the monitoring device.
Disclosure of Invention
The utility model aims to solve the technical problems that: aiming at the problems, the system for monitoring the stress of the top cover bolt of the water pump turbine is provided to solve the problem that the measurement is inaccurate in the process of measuring the stress of the top cover bolt of the water pump turbine in the prior art.
The technical scheme adopted by the utility model is as follows: a pump turbine head bolt stress monitoring system, comprising:
the top cover pressure measuring module is used for measuring the pressure born by each key measuring point of the top cover;
the top cover bolt stress measuring module is used for measuring the stress of the top cover bolt;
the PLC is electrically connected with the top cover pressure measuring module and used for calculating the load of the top cover based on the pressure of each key measuring point of the top cover measured by the top cover pressure measuring module; the calculation is a conventional calculation method, and adopts a calculation method published by Chinese electric publishing company 2019.10 (ISBN 978-5198-1566-0) of book Water pump turbine.
The PLC II is electrically connected with the PLC I and is used for calculating the theoretical stress of the top cover bolt based on the top cover load calculated by the PLC I;
the PLC III is electrically connected with the top cover bolt stress measuring module and used for acquiring the actual stress of the top cover bolt measured by the top cover bolt stress measuring module;
the PLC IV is electrically connected with the PLC II and the PLC III, and is used for comparing the theoretical stress of the top cover bolt of the PLC II with the actual stress of the top cover bolt of the PLC III and generating an alarm signal when the deviation of the theoretical stress and the actual stress exceeds a preset range;
and the alarm module is electrically connected with the PLC IV and is used for giving an alarm when the PLC IV generates an alarm signal.
The key measuring points on the top cover comprise a pressure measuring point A between the movable guide vane and the fixed guide vane, a pressure measuring point B between the rotating wheel and the movable guide vane, a top cover inlet pressure measuring point C, a labyrinth ring inlet pressure measuring point D and a labyrinth ring outlet pressure measuring point E.
The top cover pressure measurement module comprises measuring heads and pressure sensors, wherein the measuring heads are in one-to-one correspondence with the key measuring points, the measuring heads are arranged at the positions of the corresponding measuring points, and a pipeline for leading pressurized water to the pressure sensors is arranged between the measuring heads and the corresponding pressure sensors.
The top cover bolt stress measurement module is provided with an ultrasonic probe arranged on the top cover bolt and an ultrasonic emission and signal acquisition device electrically connected with the ultrasonic probe.
The ultrasonic probe is arranged at the upper end of the top cover bolt.
The beneficial effects of the utility model are as follows: according to the utility model, the pressure of each key measuring point of the top cover is measured through the top cover pressure measuring module, and the top cover load is calculated through the pressure of each key measuring point, so that the theoretical stress of the top cover bolt is obtained; meanwhile, the practical stress of the top cover bolt is measured by adopting the top cover bolt stress measuring module and is compared with the theoretical stress of the top cover bolt, so that the aim of mutual verification is fulfilled, the problem of inaccurate measurement caused by equipment faults and the like of the traditional single bolt stress measuring system is avoided, and the reliability of the bolt stress monitoring system is ensured.
Drawings
Fig. 1 is a schematic diagram of a system architecture according to an embodiment.
FIG. 2 is a schematic diagram of a station and probe arrangement in an embodiment.
1. Measuring head; 2. a pipeline; 3. a pressure sensor; 4. a cable; 5. a PLC controller I; 6. a PLC controller II; 7. an ultrasonic probe; 8. an ultrasonic emission and signal acquisition device; 9. a PLC controller III; 10. and a PLC controller IV.
Detailed Description
As shown in fig. 1, the embodiment is a system for monitoring the stress of a top cover bolt of a water pump turbine, which comprises a top cover pressure measurement module, a top cover bolt stress measurement module, a PLC controller i, a PLC controller ii, a PLC controller iii, a PLC controller iv and an alarm module.
In this example, the top cover pressure measurement module is used for measuring the pressure borne by each key measurement point of the top cover (including a pressure measurement point A between the movable guide vane and the fixed guide vane, a pressure measurement point B between the rotating wheel and the movable guide vane, a top cover inlet pressure measurement point C, a labyrinth ring inlet pressure measurement point D and a labyrinth ring outlet pressure measurement point E, see fig. 2), and has a measurement head and a pressure sensor which are arranged in one-to-one correspondence with each key measurement point, the measurement head is arranged at the position of the corresponding key measurement point, the measurement head extends to the position of the corresponding pressure sensor through a pipeline, the measurement head guides pressurized water to the pressure sensor through the pipeline, and the pressure sensor measures the pressure at the corresponding measurement point.
The top cover bolt stress measuring module in the embodiment is provided with an ultrasonic probe (see fig. 2) arranged at the upper end of the top cover bolt, and an ultrasonic transmitting and signal collecting device electrically connected with the ultrasonic probe through a cable, wherein the ultrasonic transmitting and signal collecting device can transmit ultrasonic signals to the ultrasonic probe for measuring the bolt stress; meanwhile, the ultrasonic probe transmits the stress measurement signal of the top cover bolt to the ultrasonic transmitting and signal collecting device through the transmission cable 4.
In this embodiment, the PLC controller i is electrically connected to the pressure sensor in the top cover pressure measurement module through a cable, and is configured to obtain the pressure applied to each key measurement point of the top cover measured by the top cover pressure measurement module, and calculate the load of the top cover by combining with a preset corresponding empirical formula.
In this example, the PLC controller ii is electrically connected with the PLC controller i through a cable, and is configured to obtain the top cap load calculated by the PLC controller i, and calculate by combining with a preset corresponding empirical formula to obtain the theoretical calculation stress of the top cap bolt.
In this embodiment, the PLC controller iii is electrically connected to the ultrasonic transmitting and signal collecting device in the top cover bolt stress measuring module through a cable, and is configured to obtain the actual stress of the top cover bolt measured by the top cover bolt stress measuring module.
In the embodiment, the PLC IV is electrically connected with the PLC II and the PLC III through cables, and is used for comparing the theoretical stress of the top cover bolt of the PLC II with the actual stress of the top cover bolt of the PLC III, and generating an alarm signal when the deviation of the theoretical stress and the actual stress exceeds a preset range.
In this embodiment, the alarm module is electrically connected with the PLC controller iv through a cable, and is configured to send an alarm when the PLC controller iv generates an alarm signal.
In this embodiment, the above-mentioned PLC controllers are described separately, which does not mean that a plurality of PLC controllers must be implemented in this embodiment, but the separation in this embodiment is mainly described for convenience of distinction, and in order to save costs, one PLC controller may be used to implement functions to be implemented by the plurality of PLC controllers.
It will be appreciated by persons skilled in the art that the foregoing description is a preferred embodiment of the utility model, and is not intended to limit the utility model, but rather to modify the technical solutions described in the foregoing embodiments or to make equivalent substitutions for some of the technical features, although the utility model has been described in detail with reference to the foregoing embodiments. Modifications, equivalents, and alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
Claims (5)
1. A pump turbine head bolt stress monitoring system, comprising:
the top cover pressure measuring module is used for measuring the pressure born by each key measuring point of the top cover;
the top cover bolt stress measuring module is used for measuring the stress of the top cover bolt;
the PLC is electrically connected with the top cover pressure measuring module and used for calculating the load of the top cover based on the pressure of each key measuring point of the top cover measured by the top cover pressure measuring module;
the PLC II is electrically connected with the PLC I and is used for calculating the theoretical stress of the top cover bolt based on the top cover load calculated by the PLC I;
the PLC III is electrically connected with the top cover bolt stress measuring module and used for acquiring the actual stress of the top cover bolt measured by the top cover bolt stress measuring module;
the PLC IV is electrically connected with the PLC II and the PLC III, and is used for comparing the theoretical stress of the top cover bolt of the PLC II with the actual stress of the top cover bolt of the PLC III and generating an alarm signal when the deviation of the theoretical stress and the actual stress exceeds a preset range;
and the alarm module is electrically connected with the PLC IV and is used for giving an alarm when the PLC IV generates an alarm signal.
2. The water pump turbine head bolt stress monitoring system of claim 1, wherein: the key measuring points on the top cover comprise a pressure measuring point A between the movable guide vane and the fixed guide vane, a pressure measuring point B between the rotating wheel and the movable guide vane, a top cover inlet pressure measuring point C, a labyrinth ring inlet pressure measuring point D and a labyrinth ring outlet pressure measuring point E.
3. The water pump turbine head bolt stress monitoring system of claim 1 or 2, wherein: the top cover pressure measurement module comprises measuring heads and pressure sensors, wherein the measuring heads are in one-to-one correspondence with the key measuring points, the measuring heads are arranged at the positions of the corresponding measuring points, and a pipeline for leading pressurized water to the pressure sensors is arranged between the measuring heads and the corresponding pressure sensors.
4. The water pump turbine head bolt stress monitoring system of claim 1, wherein: the top cover bolt stress measurement module is provided with an ultrasonic probe arranged on the top cover bolt and an ultrasonic emission and signal acquisition device electrically connected with the ultrasonic probe.
5. The water pump turbine head bolt stress monitoring system of claim 4, wherein: the ultrasonic probe is arranged at the upper end of the top cover bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223189781.2U CN219301844U (en) | 2022-11-30 | 2022-11-30 | Water pump turbine top cap bolt stress monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223189781.2U CN219301844U (en) | 2022-11-30 | 2022-11-30 | Water pump turbine top cap bolt stress monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219301844U true CN219301844U (en) | 2023-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223189781.2U Active CN219301844U (en) | 2022-11-30 | 2022-11-30 | Water pump turbine top cap bolt stress monitoring system |
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| CN (1) | CN219301844U (en) |
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2022
- 2022-11-30 CN CN202223189781.2U patent/CN219301844U/en active Active
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