Mechanical zero position adjusting device of water turbine speed regulating system

Abstract

The utility model relates to the technical field of water and electricity, and provides a mechanical zero position adjusting device of a water turbine speed regulating system, which comprises an infrared distance measuring unit, a wireless communication unit, a counting unit, a control unit and a zero position adjusting unit, and is characterized in that the infrared distance measuring unit is arranged on a servomotor of the water turbine speed regulating system and is used for measuring the movement distance of a telescopic rod of the servomotor; the infrared distance measurement unit is connected with the counting unit through the wireless communication unit, and the counting unit is used for collecting measurement data of the infrared distance measurement unit; the control unit is connected with the counting unit and the zero position adjusting unit, the zero position adjusting unit is connected with an adjusting bolt at a main distributing valve of the water turbine speed adjusting system in a matched mode, and the control unit is used for obtaining measurement data collected by the counting unit and controlling the zero position adjusting unit to adjust the adjusting bolt according to the measurement data. The device is high in response speed, the adjusting bolt can be automatically adjusted, the adjusting accuracy and efficiency are improved, and manpower resources are effectively saved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydropower, in particular to a mechanical zero position adjustment device for a water turbine speed regulation system. Background Art

[0002] As the control system of the turbine, the speed control system controls the output power of the turbine by adjusting the opening of the turbine's movable guide vanes. After the speed control system adjusts the turbine's movable guide vanes to the preset opening, the piston of the main pressure regulating valve of the turbine's speed control system will return to the middle position, that is, the mechanical zero position. At this time, the speed governor will remain in the middle position, neither moving the guide vanes in the opening direction nor in the closing direction. However, in order to ensure the safe operation of the turbine, its mechanical zero position needs to be slightly adjusted to the partial closing position, and the relay runs in the partial closing direction. The partial closing amount does not exceed 100μm / 5min to prevent the turbine from overspeeding.

[0003] At present, when conducting test adjustments on site, one person is usually required to adjust the adjustment bolt at the main distribution of the speed control system, and the other person sets up a dial indicator at the speed control system relay to measure the stroke. Through the cooperation of the two people, it is ensured that the mechanical zero position of the speed control system at different openings is within the specified range. In the actual test scenario, due to the structure of large turbines and the layout of the plant, the main distribution of the turbine speed control system and the speed control system relay are not in the same position, and the two people conducting the test need to communicate through a walkie-talkie.

[0004] Therefore, the following problems exist when conducting tests on site: first, due to the high noise near the turbine, the communication quality of both parties is affected; second, since the personnel at the main adjustment bolts of the speed control system cannot read the readings in real time, it is difficult to make precise adjustments to the bolts, resulting in frequent over-adjustments or under-adjustments, which seriously affects work efficiency and quality; finally, in order to ensure that the equipment is not damaged and to maintain accurate measurements, each time before adjusting the bolts or changing the relay stroke, a special person must be arranged to dismantle the dial indicator that has been set up. Only after the bolt adjustment or the relay stroke change is completed can the dial indicator be set up again, resulting in a waste of human resources. Utility Model Content

[0005] In view of the shortcomings of the above-mentioned prior art, the utility model provides a mechanical zero position adjustment device for a turbine speed control system, which solves the technical problems in the prior art of consuming manpower, low work efficiency and poor adjustment accuracy when performing mechanical zero position adjustment on a turbine speed control system.

[0006] The utility model provides a mechanical zero position adjustment device for a water turbine speed regulating system, which is applied to the water turbine speed regulating system. The device comprises: an infrared distance measuring unit, a wireless communication unit, a counting unit, a control unit and a zero position adjustment unit;

[0007] The infrared distance measuring unit is arranged on the servomotor of the turbine speed regulating system and is used to measure the movement distance of the telescopic rod of the servomotor;

[0008] The infrared ranging unit is connected to the counting unit via the wireless communication unit, and the counting unit is used to collect measurement data of the infrared ranging unit;

[0009] The control unit is connected to the counting unit and the zero position adjustment unit respectively, and the zero position adjustment unit is cooperatively connected with the adjustment bolt at the main pressure regulating valve of the turbine speed control system. The control unit is used to obtain the measurement data collected by the counting unit, and control the zero position adjustment unit to adjust the adjustment bolt according to the measurement data.

[0010] Optionally, the infrared ranging unit includes a rangefinder and a reflective plate;

[0011] The distance meter is arranged on the telescopic rod of the relay, the reflection plate is arranged on a side of the relay close to the telescopic rod, and the reflection plate is arranged opposite to the distance meter.

[0012] Optionally, the rangefinder and the reflector both include a magnetic base;

[0013] The rangefinder is magnetically connected to the telescopic rod through the magnetic base, and the reflector is magnetically connected to the relay through the magnetic base.

[0014] Optionally, the wireless communication unit includes a wireless sensor, and the wireless sensor is arranged on the telescopic rod;

[0015] The counting unit comprises a counter and a communication module connected to each other, the wireless sensor is wirelessly connected to the communication module, and the counter collects measurement data of the infrared ranging unit through the communication module.

[0016] Optionally, the counting unit further includes a display module, which is connected to the counter and is used to display the measurement data.

[0017] Optionally, the control unit includes a data calculation module and a data comparison module connected to each other;

[0018] The data calculation module is used to obtain the measurement data, calculate the real-time distance change rate according to the measurement data, and transmit the real-time distance change rate to the data comparison module;

[0019] The data comparison module compares the preset distance change rate with the real-time distance change rate to obtain a comparison result;

[0020] When the real-time distance change rate is inconsistent with the preset distance change rate, the control unit controls the zero position adjustment unit to adjust the adjustment bolt until the real-time distance change rate is consistent with the preset distance change rate.

[0021] Optionally, the zero position adjustment unit includes a stepping motor, a transmission gear and a bolt buckle;

[0022] The input end of the stepper motor is connected to the control unit, the output end of the stepper motor is sleeved with the transmission gear, the transmission gear is engaged with the bolt buckle, the bolt buckle is sleeved on the adjusting bolt and is cooperatively connected with the adjusting bolt.

[0023] Optionally, the bolt buckle is a half-type buckle structure, including two buckle bodies of the same size, and the two buckle bodies are detachably connected.

[0024] Optionally, there are multiple bolt buckles, the sizes of the hexagonal holes of the multiple bolt buckles are different, and the diameters of the outer wall gears of the multiple bolt buckles are the same.

[0025] The mechanical zero position adjustment device of the water turbine speed control system provided by the utility model utilizes an infrared distance measuring unit for measurement, and can accurately obtain the movement distance of the telescopic rod of the relay, thereby realizing precise adjustment of the speed control system with high adjustment accuracy; the infrared distance measuring unit is combined with the wireless communication unit, and can monitor the movement of the telescopic rod of the relay in real time, and transmit the data to the counting unit through wireless communication, thereby timely obtaining the operating status information of the relay with fast response speed; and the control unit is used in conjunction with the zero position adjustment unit, and the adjustment bolt can be automatically adjusted according to the measurement data collected by the counting unit, thereby realizing the mechanical zero position adjustment of the water turbine speed control system without manual intervention, thereby improving the accuracy and efficiency of the adjustment, and effectively saving human resources.

[0026] Other features and advantages of the utility model will be described in the subsequent description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings.

[0027] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 A schematic structural diagram of a mechanical zero position adjustment device for a water turbine speed control system in an embodiment provided in the present application;

[0030] Figure 2 A schematic structural diagram of a mechanical zero position adjustment device for a turbine speed control system in another embodiment provided in the present application;

[0031] Figure 3 A schematic diagram of the connection relationship between the infrared ranging unit and the counting unit in an embodiment provided in the present application.

[0032] In the figure:

[0033] 1. Relay; 2. Telescopic rod; 3. Distance finder; 4. Reflector; 5. Counter. DETAILED DESCRIPTION

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The utility model provides a mechanical zero position adjustment device for a water turbine speed regulating system, such as Figure 1As shown, the device includes an infrared distance measuring unit, a wireless communication unit, a counting unit, a control unit and a zero position adjustment unit, wherein the infrared distance measuring unit is arranged on the relay of the turbine speed control system, and is used to measure the movement distance of the telescopic rod of the relay; the infrared distance measuring unit is connected to the counting unit through the wireless communication unit, and the counting unit is used to collect measurement data of the infrared distance measuring unit; the control unit is respectively connected to the counting unit and the zero position adjustment unit, the zero position adjustment unit is matched with the adjustment bolt at the main pressure regulating valve of the turbine speed control system, and the control unit is used to obtain the measurement data collected by the counting unit, and control the zero position adjustment unit to adjust the adjustment bolt according to the measurement data.

[0038] The mechanical zero position adjustment device of the water turbine speed control system provided by the utility model utilizes an infrared distance measuring unit for measurement, and can accurately obtain the movement distance of the telescopic rod of the relay, thereby realizing precise adjustment of the speed control system with high adjustment accuracy; the infrared distance measuring unit is combined with the wireless communication unit, and can monitor the movement of the telescopic rod of the relay in real time, and transmit the data to the counting unit through wireless communication, thereby timely obtaining the operating status information of the relay with fast response speed; and the control unit is used in conjunction with the zero position adjustment unit, and the adjustment bolt can be automatically adjusted according to the measurement data collected by the counting unit, thereby realizing the mechanical zero position adjustment of the water turbine speed control system without manual intervention, thereby improving the accuracy and efficiency of the adjustment, and effectively saving human resources.

[0039] Specifically, in the above embodiment, if Figure 3 As shown, the infrared distance measuring unit includes a distance meter and a reflection plate, wherein the distance meter is arranged on the telescopic rod of the relay, and the reflection plate is arranged on a side of the relay close to the telescopic rod, and the reflection plate is arranged opposite to the distance meter.

[0040] In this embodiment, by arranging the rangefinder 3 on the telescopic rod 2 of the relay 1 and arranging the reflector 4 on the side of the relay 1 close to the telescopic rod 2, it is possible to ensure that the infrared signal is reflected between the telescopic rod 2 of the relay and the reflector 4, so that the time of the infrared signal sent from the rangefinder 3 to the reflector 4 and then returned can be accurately measured, thereby accurately calculating the movement distance of the telescopic rod 2 of the relay; by arranging the reflector 4 on the side of the relay 1 close to the telescopic rod 2 and ensuring that it is arranged relative to the rangefinder 3, the return of the reflected signal is more stable and reliable, effectively reducing the influence of external interference on the measurement result, and improving the stability and accuracy of the system; the design of the reflector 4 can realize the distance measurement between the rangefinder 3 and the target in a limited space, without installing additional sensors, effectively saving installation space; the infrared ranging unit provided by the present application can monitor the movement distance of the telescopic rod 2 of the relay in real time, so that the system can obtain the operation status information in time, with fast response speed and high measurement accuracy, avoiding the installation and disassembly of the dial indicator before and after the measurement, and having high measurement efficiency.

[0041] Furthermore, the rangefinder and the reflector both include a magnetic base, wherein the rangefinder is magnetically connected to the telescopic rod via the magnetic base, and the reflector is magnetically connected to the relay via the magnetic base.

[0042] In this embodiment, the rangefinder 3 and the reflector 4 are magnetically connected to the telescopic rod 2 and the relay 1 through a magnetic base, respectively, to ensure that the rangefinder 3 and the reflector 4 remain fixed during use, prevent displacement or loosening during operation, and ensure the accuracy and reliability of measurement; the use of a magnetic base for fixation can be applicable to rangefinders 3 and reflectors 4 of different types and models, with strong versatility, and at the same time, the rangefinder 3 and the reflector 4 are more convenient to install and disassemble, easy to replace, and improve maintenance efficiency.

[0043] Specifically, in the above embodiment, if Figure 2 and Figure 3 As shown, the wireless communication unit includes a wireless sensor, which is arranged on the telescopic rod, wherein the counting unit includes a counter and a communication module connected to each other, the wireless sensor is wirelessly connected to the communication module, and the counter collects measurement data of the infrared ranging unit through the communication module.

[0044] In this embodiment, wireless communication is performed between the wireless sensor and the communication module, so that the measurement data collected by the infrared ranging unit can be transmitted to the counting unit in real time, ensuring that the device can obtain the movement distance information of the telescopic rod 2 in time, and the stability and reliability of wireless communication can ensure the accuracy of data collection, thereby improving the accuracy and reliability of the measurement results; the use of wireless communication technology can avoid the complex wiring required for traditional wired connections and reduce the maintenance cost of the device. The use of wireless communication units makes the structure of the device more flexible, without being restricted by wiring distance and topological structure, and the positions of various components can be freely arranged and adjusted according to actual conditions, thereby improving the scalability and adaptability of the device.

[0045] Specifically, the wireless sensor and the rangefinder in the infrared ranging unit are usually arranged on the telescopic rod of the relay in a collective design. Before use, the wireless sensor and the rangefinder need to be paired to ensure the accuracy of data transmission.

[0046] Further, such as Figure 2 As shown, the counting unit further comprises a display module, wherein the display module is connected to the counter and is used for displaying the measurement data.

[0047] In this embodiment, in addition to utilizing the control unit to cooperate with the zero-position adjustment unit and controlling the zero-position adjustment unit through the control unit to adjust the adjustment bolt, manual adjustment or manual supervision can also be used to participate in the entire adjustment process. Specifically, a display module is provided in the counting unit, and the display module directly displays the measurement data. In one case, the staff manually adjusts the adjustment bolt at the main pressure regulating valve by reading the measurement data to avoid being restricted by the on-site environment and causing the device to be unable to be placed as a whole. Although the manual adjustment method is not as accurate as the automatic adjustment of the zero-position adjustment unit, it can increase redundancy for the overall use of the device and provide more abundant adjustment schemes. In another case, the zero-position adjustment unit is still used for adjustment, and the display module is provided so that the staff can monitor the entire adjustment process in real time according to the readings, and provide timely feedback and adjustments when problems occur in the adjustment process, thereby increasing the fault tolerance of the device.

[0048] Specifically, in the above embodiment, if Figure 2 As shown, the control unit includes a data calculation module and a data comparison module connected to each other, wherein the data calculation module is used to obtain measurement data, calculate the real-time distance change rate according to the measurement data, and transmit the real-time distance change rate to the data comparison module; the data comparison module compares the real-time distance change rate with the preset distance change rate to obtain a comparison result; when the real-time distance change rate is inconsistent with the preset distance change rate, the control unit controls the zero position adjustment unit to adjust the adjustment bolt until the real-time distance change rate is consistent with the preset distance change rate.

[0049] In this embodiment, the data calculation module can obtain measurement data and calculate the real-time distance change rate, so that the control unit can monitor the motion state and position change of the telescopic rod in real time; and the data comparison module compares the real-time distance change rate with the preset distance change rate. Once an inconsistency is found between the two, the control unit can automatically trigger the zero position adjustment unit to adjust the adjustment bolt to realize the automatic zero position adjustment function; and, by comparing the real-time distance change rate with the preset distance change rate, the control unit can realize precise control of the position of the telescopic rod to ensure that it is consistent with the expected position change, thereby ensuring the stability and reliability of the speed regulation system; through the setting of the zero position adjustment function of the present application, the control unit can make adjustments immediately when the position deviation is monitored in real time, thereby reducing the time delay in the adjustment process, improving the response speed and adjustment efficiency of the system, and at the same time, the automatic adjustment function of the control unit reduces the need for manual intervention, reduces the workload of operators, and also reduces the risks that may be caused by human error, thereby improving the safety of the system.

[0050] Specifically, in the above embodiment, if Figure 2As shown, the zero position adjustment unit includes a stepper motor, a transmission gear and a bolt buckle, wherein the input end of the stepper motor is connected to the control unit, the output end of the stepper motor is sleeved with a transmission gear, the transmission gear is meshed with the bolt buckle, and the bolt buckle is sleeved on the adjusting bolt and is connected with the adjusting bolt.

[0051] In this embodiment, through the control of the stepper motor, the zero-position adjustment unit can achieve a small movement of the adjustment bolt, thereby achieving precise adjustment of the position of the telescopic rod. The design of the transmission gear and the bolt buckle enables the rotation direction and speed to be effectively transmitted to the adjustment bolt, ensuring the accuracy and precision of the adjustment; and the zero-position adjustment unit is connected to the control unit and can receive instructions sent by the control unit to realize the automatic adjustment function, reduce manual intervention, and improve the efficiency and precision of the adjustment; a stepper motor is used as a driver, which has high rotation accuracy, fast response speed and low noise, thereby improving the stability and reliability of the adjustment system, and the matching connection between the bolt buckle and the adjustment bolt also ensures the stability and reliability of the adjustment process; the zero-position adjustment unit provided in the present application has a simple structure, is relatively easy to install and maintain, and can adapt to different working environments and requirements. By adjusting the parameters of the stepper motor, adjustments of different ranges and precisions can be achieved to meet the needs of various practical application scenarios.

[0052] Furthermore, the bolt buckle is a half-type buckle structure, including two buckle bodies of the same size, and the two buckle bodies are detachably connected.

[0053] In this embodiment, a bolt clip with a half-type clip structure is adopted, so that the installation and disassembly process of the bolt clip is simpler and faster, and the operation can be carried out quickly when maintenance, replacement or adjustment is required, thereby improving the convenience and efficiency of operation; the half-type clip structure makes the bolt clip highly flexible and can adapt to adjustment bolts of different sizes and shapes. It is also convenient to adjust and replace the adjustment bolts to meet the requirements of different working scenarios and needs.

[0054] Furthermore, there are multiple bolt buckles, the sizes of the hexagonal holes of the multiple bolt buckles are different, and the diameters of the outer wall gears of the multiple bolt buckles are the same.

[0055] In this embodiment, hexagonal holes of bolt clips of different sizes are provided to accommodate adjusting bolts of different specifications, thereby improving the applicability and flexibility of the device and facilitating direct insertion of the stepper motor into the device without replacing the stepper motor and the transmission gear; the diameters of the outer wall gears of multiple bolt clips are the same, ensuring that the positions on the transmission gears are always consistent, thereby maintaining the balance and stability of the adjusting bolts.

[0056] The mechanical zero position adjustment device of the turbine speed regulating system provided by the utility model has the following specific use process:

[0057] First, the infrared distance measuring unit measures the movement distance of the telescopic rod of the relay of the turbine speed control system, and then the counting unit collects the measurement data of the infrared distance measuring unit through the wireless communication unit, and transmits the measurement data to the control unit, the control unit calculates the measurement data, and obtains the real-time distance change rate within 5 minutes. If the measured distance data changes more, it is identified as the guide vane in the open direction, and the change is positive; if the measured distance data changes less, it is identified as the guide vane in the closed direction, and the change is negative; then the control unit determines whether the real-time distance change rate reaches the preset distance change rate based on the preset distance change rate, such as -100μm / 5min as a benchmark. If the preset distance change rate is not reached, the zero position adjustment unit is controlled to adjust the adjustment bolt at the main pressure regulating valve of the turbine speed control system until the real-time distance change rate is consistent with the preset distance change rate. The above method can realize automatic adjustment of the adjustment bolt, improve the accuracy and efficiency of the adjustment, ensure that the final real-time distance change rate is consistent with the preset distance change rate, and effectively save human resources.

[0058] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A mechanical zero position adjustment device for a turbine speed control system, characterized in that: Applied to a turbine speed regulating system, the device comprises: an infrared distance measuring unit, a wireless communication unit, a counting unit, a control unit and a zero position adjusting unit; The infrared distance measuring unit is arranged on the servomotor of the turbine speed regulating system and is used to measure the movement distance of the telescopic rod of the servomotor; The infrared ranging unit is connected to the counting unit via the wireless communication unit, and the counting unit is used to collect measurement data of the infrared ranging unit; The control unit is connected to the counting unit and the zero position adjustment unit respectively, and the zero position adjustment unit is cooperatively connected with the adjustment bolt at the main pressure regulating valve of the turbine speed control system. The control unit is used to obtain the measurement data collected by the counting unit, and control the zero position adjustment unit to adjust the adjustment bolt according to the measurement data.

2. The mechanical zero position adjustment device for a water turbine speed regulating system according to claim 1, characterized in that: The infrared distance measuring unit comprises a distance meter and a reflective plate; The distance meter is arranged on the telescopic rod of the relay, the reflection plate is arranged on a side of the relay close to the telescopic rod, and the reflection plate is arranged opposite to the distance meter.

3. The mechanical zero position adjustment device for a water turbine speed regulating system according to claim 2, characterized in that: The rangefinder and the reflector both include a magnetic base; The rangefinder is magnetically connected to the telescopic rod through the magnetic base, and the reflector is magnetically connected to the relay through the magnetic base.

4. The mechanical zero position adjustment device for a water turbine speed regulating system according to claim 1, characterized in that: The wireless communication unit includes a wireless sensor, and the wireless sensor is arranged on the telescopic rod; The counting unit comprises a counter and a communication module connected to each other, the wireless sensor is wirelessly connected to the communication module, and the counter collects measurement data of the infrared ranging unit through the communication module.

5. The mechanical zero position adjustment device for a water turbine speed regulating system according to claim 4, characterized in that: The counting unit further comprises a display module, which is connected to the counter and is used to display the measurement data.

6. The mechanical zero position adjustment device for a water turbine speed regulating system according to claim 1, characterized in that: The control unit includes a data calculation module and a data comparison module connected to each other; The data calculation module is used to obtain the measurement data, calculate the real-time distance change rate according to the measurement data, and transmit the real-time distance change rate to the data comparison module; The data comparison module compares the preset distance change rate with the real-time distance change rate to obtain a comparison result; When the real-time distance change rate is inconsistent with the preset distance change rate, the control unit controls the zero position adjustment unit to adjust the adjustment bolt until the real-time distance change rate is consistent with the preset distance change rate.

7. The mechanical zero position adjustment device for a water turbine speed regulating system according to claim 1, characterized in that: The zero position adjustment unit comprises a stepping motor, a transmission gear and a bolt buckle; The input end of the stepper motor is connected to the control unit, and the output end of the stepper motor is sleeved with the transmission gear, and the transmission gear is meshed with the bolt buckle through the outer wall gear of the bolt buckle, and the bolt buckle is sleeved on the adjusting bolt, and the bolt buckle is matched and connected with the adjusting bolt through the hexagonal hole on the inner wall of the bolt buckle.

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