Automatic monitoring and adjusting system and method for tail water gate of pumped storage power station

Abstract

The automatic monitoring and adjusting system comprises a regulation and control assembly used for being installed on the upstream side of a gate assembly, the regulation and control assembly comprises a first flow guide plate, and the first flow guide plate is arranged in a draft tube tunnel; a lifting mechanism used for driving the first flow guide plate to ascend and descend is installed in the tailgate door opening, the power output end of the lifting mechanism downwards penetrates through the concrete foundation and then is fixedly connected with the first flow guide plate, and the right end of the first flow guide plate is flush with the left side surface of the gate. By arranging the regulation and control assembly, water flow at the bottom of the gate flows uniformly, the local vortex structure is reduced, the flow state in the tail water branch hole is improved, dynamic water pressure distribution near the gate tends to be uniform, and therefore tail water gate vibration induced by water flow pulsation is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water conservancy and hydropower engineering, and particularly relates to an automatic monitoring and adjusting system and method for a tail water gate of a pumped storage power station. BACKGROUND

[0002] In recent years, in order to alleviate the impact of new energy grid connection on the power grid, a number of pumped storage power stations have been built in China, which can pump water to consume excess power during the low electricity consumption period, and release water to generate electricity during the peak electricity consumption period. The pumped storage power station unit needs a certain suction height, so the unit installation elevation is low, and the tail water gate of the tail water branch pipe is also installed at a low position, often 50-100 m underwater in the lower reservoir. Due to the large water pressure and large water level amplitude, the tail water gate is often subjected to pulsating water flow and vibrates. Since the tail water gate of the pumped storage power station is underwater, it is difficult to monitor the vibration, and there is currently no effective method to reduce the vibration of the tail water gate caused by water flow pulsation. Therefore, the tail water gate operates under different non-design conditions of the pump-turbine, which not only needs to meet the requirements of strength, stiffness and stability, but also needs to meet the requirements of flow-induced vibration limitation, which is a problem to be solved at present. SUMMARY

[0003] The technical problem to be solved by the present application is to solve the problems in the above background, provide an automatic monitoring and adjusting system and method for a tail water gate of a pumped storage power station, which can help to improve the flow state inside the tail water branch tunnel, make the dynamic water pressure distribution near the gate tend to be uniform, and thereby reduce the vibration of the tail water gate induced by water flow pulsation.

[0004] In order to achieve the above purpose, in a first aspect, the present application provides an automatic monitoring and adjusting system for a tail water gate of a pumped storage power station, comprising a regulating component for installation on the upstream side of the gate assembly, the regulating component comprising a first guide plate, the first guide plate being arranged in the tail water pipe tunnel, a lifting mechanism for driving the first guide plate to lift being installed in the tail water gate hole, the power output end of the lifting mechanism being connected and fixed with the first guide plate after passing through the concrete foundation downward, and the right end of the first guide plate being flush with the left side surface of the gate.

[0005] The first guide plate comprises a first main plate, and first and second circular arc surfaces are arranged at the left and right ends of the first main plate respectively, the first and second circular arc surfaces being centrally symmetric and the circular arc surfaces facing the bottom of the tail water pipe tunnel.

[0006] The central angles of the first and second circular arc surfaces are between 10° and 30°.

[0007] The first and second circular arc surfaces are fixedly installed with elastic plates; the elastic plates comprise rubber plates and silica gel plates.

[0008] The length of the first main plate is not less than 2 times the gate thickness, the width is 0.8-0.9 times the width of the tailrace tunnel, and the thickness is 5-15 mm.

[0009] The first main plate is provided with a hexagonal dense round hole.

[0010] The lifting mechanism comprises lifting rods, a lifting plate, a power rod and a driver, the lifting rods are provided in at least three, the lower ends of the lifting rods are fixedly connected with the first guide plate, the upper ends of the lifting rods are movably arranged through the concrete foundation and are fixedly connected with the lifting plate in the tailrace gate hole, a longitudinal power rod is installed in the middle of the lifting plate through screw thread cooperation, the power rod is connected with the output shaft of the driver for transmission, the power rod can rotate under the driving of the driver, and the driver is fixedly installed in the tailrace gate hole.

[0011] A base is installed in the tailrace gate hole, the driver is installed on the base, the lifting rods pass through the pre-set holes in the base, scales are arranged on the lifting rods, and the depth position of the first guide plate is obtained through the scales on the lifting rods at the top surface of the base.

[0012] A groove is arranged on the outside of the lifting rods on the upper side of the concrete foundation, a first water stop device is installed at the bottom of the groove, a return spring is installed in the groove, the return spring is sleeved on the lifting rod, and a limiting cap is installed on the lifting rod at the top of the return spring.

[0013] Further, the regulating assembly further comprises a second guide plate, the second guide plate comprises a telescopic arm and a second main plate, the telescopic arm is fixedly connected to one end of the second main plate, the second main plate is slidably installed at the bottom of the first guide plate through a sliding structure, an adjusting rod is rotatably installed on the first guide plate, the lower end of the adjusting rod extends out of the bottom of the first guide plate, an adjusting gear is installed on the adjusting rod at the bottom of the first guide plate, a tooth groove structure is arranged on the telescopic arm, the adjusting gear and the telescopic arm are in meshing transmission, the upper end of the adjusting rod movably passes through the concrete foundation into the tailrace gate hole, a second driver is installed on the upper end of the adjusting rod, the second driver drives the adjusting rod to rotate, so as to drive the telescopic movement of the second guide plate; in the extended state of the second guide plate, the right end of the second guide plate exceeds the right side surface of the gate.

[0014] Third and fourth arc surfaces are arranged at the left and right ends of the second main plate respectively, the third and fourth arc surfaces are centrally symmetric and the arc surfaces face the bottom of the tailrace tunnel.

[0015] The central angles of the third and fourth arc surfaces correspond to 10°-30°.

[0016] Elastic plates are fixedly installed on the third and fourth arc surfaces; the elastic plates comprise rubber plates and silica gel plates.

[0017] The length of the second main plate is 1-2 times the thickness of the gate, the width is not less than the width of the first flow guide plate, and the thickness is 5-10 mm.

[0018] The second main plate is provided with a hexagonal densely packed circular hole.

[0019] The sliding structure comprises a guide rail groove arranged on the second flow guide plate and a guide block fixedly installed on the lower side of the first flow guide plate, the guide block slidingly extends into the guide rail groove, and the guide block is provided with a limiting portion at the bottom of the second flow guide plate, and the width of the limiting portion is greater than the width of the guide rail groove.

[0020] The adjusting rod is provided with a second water stop device at the position where the adjusting rod contacts the top of the concrete foundation.

[0021] A pressure pulsation sensor is installed on the bottom plate of the gate, a cable of the pressure pulsation sensor extends through the inside of the gate to the tail water gate hole and is electrically connected with the processor module, and the pressure pulsation sensor is used for monitoring the pressure pulsation of the tail water gate.

[0022] In the second aspect, the application further provides an automatic monitoring and adjusting method for the tail water gate of the pumped storage power station, the monitoring and adjusting method adopts the automatic monitoring and adjusting system for the tail water gate of the pumped storage power station, and the monitoring and adjusting method comprises the following steps: S1: obtaining the pressure pulsation data of the bottom of the gate through the pressure pulsation sensor on the bottom plate of the gate; S2: when the pressure pulsation data exceeds the threshold value, the control system obtains the position data of the opening and closing device, and then calculates the height position of the gate bottom plate in the tail water tunnel; S3: the control system controls the lifting mechanism to start, and drives the first flow guide plate to move downward, so that the bottom of the first flow guide plate is flush with the bottom of the gate; S4: when the pressure pulsation data does not decrease to the set range, the control system controls the second drive to start, so that the second flow guide plate extends to the side of the gate, and the right end of the second flow guide plate exceeds the right side surface of the gate.

[0023] The application adopting the above technical scheme has the following outstanding features compared with the prior art: 1. The application sets the regulating component, so that the water flow at the bottom of the gate is uniform, the local vortex structure is reduced, the flow state in the tail water branch tunnel is improved, the dynamic water pressure distribution near the gate tends to be uniform, and thus the vibration of the tail water gate induced by water flow pulsation is reduced.

[0024] 2. The first flow guide plate divides and guides the water entering the gate, reduces the direct impact of the tail flow on the gate, weakens the disturbance degree of the water flow near the gate, makes the water flow at the bottom of the gate more uniform, and improves the flow state in the tail water branch tunnel.

[0025] 3、The second guide plate reduces the interference of the rubber water stop at the bottom of the gate to the flow pattern of the water flow, and further reduces the vibration of the draft tube gate induced by the water flow pulsation.

[0026] 4、The automatic monitoring and adjusting system is arranged to monitor the pressure pulsation at the bottom of the gate, so that the position and telescopic length of the guide plate can be adjusted according to the pressure pulsation, and the problem of excessive hydraulic vibration of the draft tube gate is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0029] Figure 2 It is a schematic diagram of the structure of the first guide plate of the present application.

[0030] Figure 3 It is a schematic diagram of the structure of the first guide plate and the second guide plate of the present application.

[0031] Figure 4 It is a schematic diagram of the structure of the lifting mechanism of the present application.

[0032] Figure 5 It is a top view schematic diagram of the structure of the second guide plate of the present application.

[0033] Figure 6 It is a front view schematic diagram of the structure of the second guide plate of the present application.

[0034] REFERENCE NUMERALS Gate assembly 100; Draft tube tunnel 101, draft tube gate hole 102, concrete foundation 103, gate slot 104, gate 105, opening and closing device 106, gate bottom water stop 107; Control assembly 200; First guide plate 201, first circular arc surface 2011, second circular arc surface 2012, first main plate 2013; Second guide plate 202, telescopic arm 2021, third circular arc surface 2022, fourth circular arc surface 2023, second main plate 2024, guide rail groove 2025, guide block 2026, adjusting gear 2027, adjusting rod 2028, second driver 2029, second water stop device 2030; Lifting mechanism 203, groove 2031, first water stop device 2032, return spring 2033, limit cap 2034, lifting plate 2035, power rod 2036, driver 2037, base 2038. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be apparently and completely described in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0036] It should be noted that, in the specification, "one embodiment", "an embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiment can include a specific feature, structure or characteristic, but not necessarily every embodiment includes the specific feature, structure or characteristic. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it should be within the knowledge of a person of ordinary skill in the related art to realize this feature, structure or characteristic in combination with other embodiments (whether or not explicitly described).

[0037] Referring to Figure 1 , the gate assembly 100 of the tailrace gate of the pumped storage power station includes a tailrace tunnel 101, a tailrace gate hole 102 located above the tailrace tunnel 101, a concrete foundation 103 located between the tailrace tunnel 101 and the tailrace gate hole 102, a gate slot 104 arranged in the concrete foundation 103, a gate 105 installed in the gate slot 104, an opening and closing device 106 installed inside the tailrace gate hole 102 and connected with the top of the gate, and a gate bottom seal 107 installed at the bottom of the gate.

[0038] Embodiment 1 Referring to Figure 1 An automatic monitoring and adjusting system for the tailrace gate of the pumped storage power station includes a control assembly 200 arranged on the upstream side of the gate assembly 100, the control assembly 200 including a first flow guide plate 201 arranged in the tailrace tunnel 101, a lifting mechanism 203 arranged in the tailrace gate hole 102 and used to drive the first flow guide plate 201 to lift, a power output end of the lifting mechanism 203 downwardly penetrating through the concrete foundation 103 and fixedly connected with the first flow guide plate 201, and the right end of the first flow guide plate 201 flush with the left side surface of the gate 105.

[0039] The lifting mechanism 203 is used to drive the first guide plate 201 to move up and down, so as to adjust the height of the first guide plate 201, so that the first guide plate 201 can move to the bottom position of the gate 105. By arranging the first guide plate 201, when the first guide plate 201 moves to the bottom position of the gate 105, the water flow at the bottom of the gate 105 can be made uniform, the local vortex structure is reduced, the flow state inside the tail water branch tunnel is improved, the dynamic water pressure distribution near the gate tends to be uniform, thereby reducing the vibration of the tail water gate induced by water flow pulsation.

[0040] Further, referring to Figure 2 , the first guide plate 201 comprises a first main plate 2013, and the left and right ends of the first main plate 2013 are respectively provided with a first circular arc surface 2011 and a second circular arc surface 2012. The first circular arc surface 2011 and the second circular arc surface 2012 are centrally symmetric and the circular arc surfaces face the bottom of the tail water pipe tunnel 101. By arranging the first circular arc surface 2011 and the second circular arc surface 2012, the impact of the water flow on the end of the first guide plate 201 is eliminated, and the stability of the water flow at the bottom of the gate 105 is further improved.

[0041] In the embodiment, the central angles of the first circular arc surface 2011 and the second circular arc surface 2012 are between 10° and 30°.

[0042] Further, the first circular arc surface 2011 and the second circular arc surface 2012 are fixedly installed with elastic plates. Under the impact of the water flow, cavitation is not easy to occur on the elastic plates, thereby preventing cavitation from occurring on the first circular arc surface 2011 and the second circular arc surface 2012.

[0043] In the embodiment, the elastic plates comprise rubber plates and silica gel plates. The rubber plates and the silica gel plates can be fixedly connected to the first guide plate 201 in a rubber-coated manner, or can be fixedly connected to the first guide plate 201 in a rivet manner.

[0044] In the embodiment, the length of the first main plate 2013 is not less than 2 times the thickness of the gate 105, the width is 0.8-0.9 times the width of the tail water pipe tunnel 101, and the thickness is 5-15 mm. Through the above structure, the direct impact of the water flow on the gate is minimized, the width direction is as large as possible to expand the range of the guide plate, but should be less than the width of the tunnel, so as to avoid the interference of the tunnel wall to the operation of the guide plate.

[0045] Further, the first main plate 2013 is provided with a hexagonal dense circular hole, which eliminates the water pressure difference on the upper and lower sides of the first guide plate 201, so that the water passing through the gate 105 is more stable. The hexagonal dense circular hole can make the first guide plate 201 have more pore channels.

[0046] Referring to Figure 1 , 4The lifting mechanism 203 includes a lifting rod, a lifting plate 2035, a power rod 2036, and a driver 2037. There are at least three lifting rods, each of which is fixedly connected to the first guide plate 201 at its lower end. The upper end of each lifting rod flexibly passes through the concrete foundation 103 and is fixedly connected to the lifting plate 2035 within the tailwater gate opening 102. A longitudinal power rod 2036 is threadedly mounted in the middle of the lifting plate 2035. The power rod 2036 is connected to the output shaft of the driver 2037 for transmission. The power rod 2036 rotates under the drive of the driver 2037, which is fixedly mounted within the tailwater gate opening 102. The power rod 2036, which is a T-shaped threaded rod, is driven to rotate. This drives the lifting plate 2035 and the first guide plate 201 up and down. In this embodiment, the driver 2037 is a servo motor with a reducer.

[0047] Furthermore, a base 2038 is installed in the tailwater gate hole 102, the driver 2037 is installed on the base 2038, the lifting rod passes through a preset hole on the base 2038, and a scale is set on the lifting rod. The depth position of the first guide plate 201 is obtained by the scale on the lifting rod at the same level as the top surface of the base 2038.

[0048] Combine Figure 4 The base 2038 adopts a steel structure bracket, the driver 2037 is installed on the upper bottom of the base 2038, and the power rod 2036 is fixedly connected to the output shaft of the driver 2037.

[0049] See also Figure 4 A groove 2031 is provided on the upper side of the concrete foundation 103, outside the lifting rod. A first water-stopping device 2032 is fixedly mounted at the bottom of the groove 2031. The first water-stopping device 2032 seals the lifting rod and the groove 2031, preventing water from entering the tailwater gate opening 102 through the gap between the concrete foundation 103 and the lifting rod. The first water-stopping device 2032 can be a water-stopping sealing ring.

[0050] A return spring 2033 is installed within the groove 2031. This return spring 2033 is mounted on a lifting rod, which has a limit cap 2034 installed on top of the return spring 2033. This structure allows the return spring 2033 to be compressed when the first deflector plate 201 moves downward, eliminating the transmission backlash in the lifting mechanism 203, preventing the first deflector plate 201 from wobbling and improving stability. Furthermore, when the first deflector plate 201 needs to move upward, the rebound force of the return spring 2033 provides upward support to the lifting plate 2035, preventing the first deflector plate 201 from getting stuck and allowing it to move upward smoothly.

[0051] Example 2: Based on the embodiment 1, referring to Figure 1 、 3 , 5, 6, the regulating assembly 200 further comprises a second flow guide plate 202, the second flow guide plate 202 comprises a telescopic arm 2021 and a second main plate 2024, the telescopic arm 2021 is fixedly connected to one end of the second main plate 2024, the second main plate 2024 is slidingly installed at the bottom of the first flow guide plate 201 through a sliding structure, an adjusting rod 2028 is rotatably installed on the first flow guide plate 201, the lower end of the adjusting rod 2028 extends downward beyond the bottom of the first flow guide plate 201, an adjusting gear 2027 is installed on the adjusting rod 2028 at the bottom of the first flow guide plate 201, a tooth groove structure is provided on the telescopic arm 2021, the adjusting gear 2027 and the telescopic arm 2021 are in meshing transmission, the upper end of the adjusting rod 2028 movably penetrates into the tail water gate hole 102 from the concrete foundation 103, a second driver 2029 is installed on the upper end of the adjusting rod 2028, the second driver 2029 drives the adjusting rod 2028 to rotate, so as to drive the telescopic movement of the second flow guide plate 202; in the extended state of the second flow guide plate 202, the right end of the second flow guide plate 202 exceeds the right side surface of the gate 105. The second flow guide plate reduces the interference of the rubber waterstop at the bottom of the gate to the flow state of the water flow, and further reduces the vibration of the tail water gate induced by the water flow pulsation.

[0052] Since the second flow guide plate 202 is slidingly installed at the bottom of the first flow guide plate 201, the second flow guide plate 202 can move up and down with the first flow guide plate 201. In addition, the adjusting gear 2027 installed on the adjusting rod 2028 and the telescopic arm 2021 are in meshing transmission, so that the second flow guide plate 202 can move telescopically. When the first flow guide plate 201 needs to move upward, the second flow guide plate 202 is retracted to the left side. When the pressure pulsation data does not drop to the set range, the second driver 2029 drives the adjusting rod 2028 to rotate, drives the second flow guide plate 202 to extend to the right side, and makes the right end of the second flow guide plate 202 exceed the right side surface of the gate 105 It should be noted that, in the implementation, since the adjusting rod 2028 needs to rotate and also needs to lift, the upper end of the adjusting rod 2028 can adopt a spline shaft, the second driver 2029 adopts a servo reduction motor with a central hole on the output shaft, the central hole of the output shaft of the second driver 2029 adopts a spline sleeve structure, and the spline shaft part of the upper end of the adjusting rod 2028 slidingly penetrates through the spline sleeve, so that the functions of rotating and lifting of the adjusting rod 2028 can be realized. Only the space below the base 2038 needs to be ensured, or the adjusting rod 2028 needs to be deviated from the power rod 2036, so that the power rod 2036 does not interfere with the adjusting rod 2028.

[0053] In addition, in order to improve the stability of the engagement transmission of the adjusting gear 2027 and the telescopic arm 2021, a sliding block is fixedly arranged on the bottom of the first guide plate 201 on the side away from the adjusting gear 2027, and the telescopic arm 2021 is in sliding fit with the sliding block, so that the telescopic arm 2021 is prevented from being deformed outwardly away from the adjusting gear 2027 during transmission.

[0054] Referring to Figure 6 , the left and right ends of the second main plate 2024 are respectively provided with the third arc surface 2022 and the fourth arc surface 2023, and the third arc surface 2022 and the fourth arc surface 2023 are centrally symmetric and the arc surfaces are directed to the bottom of the tailrace tunnel 101. The third arc surface 2022 and the fourth arc surface 2023 are arranged to eliminate the impact of the water flow on the ends of the second guide plate 202, and further improve the stability of the water flow at the bottom of the gate 105.

[0055] In the embodiment, the central angles of the third arc surface 2022 and the fourth arc surface 2023 are between 10° and 30°.

[0056] Further, the third arc surface 2022 and the fourth arc surface 2023 are fixedly provided with elastic plates, and the elastic plates are not easy to be cavitated under the impact of the water flow, so as to prevent the cavitation on the first arc surface 2011 and the second arc surface 2012.

[0057] In the embodiment, the elastic plates include rubber plates and silica gel plates. The rubber plates and the silica gel plates can be fixedly connected to the second guide plate 202 in a rubber-coated manner, or can be fixedly connected to the second guide plate 202 in a rivet manner.

[0058] In the embodiment, the length of the second main plate 2024 is not less than 2 times the thickness of the gate 105, the width of the second main plate 2024 is not less than the width of the first guide plate 201, and the thickness of the second main plate 2024 is between 5 mm and 10 mm.

[0059] The second main plate 2024 is provided with a plurality of hexagonally closely arranged circular holes, so as to eliminate the water pressure difference on the upper and lower sides of the second guide plate 202, and make the water passing through the gate 105 more stable.

[0060] Referring to Figure 5 , the sliding structure includes a guide rail groove 2025 arranged on the second guide plate 202, and a guide block 2026 fixedly arranged on the lower side of the first guide plate 201, the guide block 2026 slidingly extends into the guide rail groove 2025, and the guide block 2026 is provided with a limiting portion at the bottom of the second guide plate 202, and the width of the limiting portion is greater than the width of the guide rail groove 2025. Through the above structure, the second guide plate 202 can be directionally telescopic sliding on the lower side of the first guide plate 201.

[0061] Referring to Figure 4The second water-stopping device 2030 is arranged at the position where the adjusting rod 2028 is in contact with the top of the concrete foundation 103, so that the sliding sealing between the adjusting rod 2028 and the concrete foundation 103 is realized. The second water-stopping device 2030 can adopt a water-stopping sealing ring structure.

[0062] Embodiment 3 On the basis of the embodiment 1 or the embodiment 2, a pressure pulsation sensor is arranged on the bottom plate of the gate 105, the cable of the pressure pulsation sensor extends through the inside of the gate 105 to the tail water gate hole 102 and is electrically connected with the processor module, and the pressure pulsation sensor is used for monitoring the tail water gate pressure pulsation, so that the pressure pulsation at the bottom of the gate 105 can be measured in real time.

[0063] Embodiment 4 On the basis of the embodiment 3, the application further provides an automatic monitoring and adjusting method for the tail water gate of the pumped storage power station, and a kind of automatic monitoring and adjusting system for the tail water gate of the pumped storage power station is adopted, and the monitoring and adjusting method comprises the following steps: S1: the pressure pulsation data at the bottom of the gate 105 is obtained by the pressure pulsation sensor on the bottom plate of the gate 105.

[0064] S2: when the pressure pulsation data exceeds the threshold value, the position data of the opening and closing device 106 is obtained by the control system, and then the height position of the gate 105 bottom plate in the tail water pipe tunnel 101 is calculated.

[0065] S3: the control system controls the lifting mechanism 203 to start, drives the first flow guide plate 201 to move downward, and makes the bottom of the first flow guide plate 201 flush with the bottom of the gate 105.

[0066] Specifically, the output shaft of the driver 2037 rotates forward or reversely, thereby driving the power rod 2036 to rotate, the power rod 2036 is a T-shaped threaded rod, the power rod 2036 is threadedly connected with the lifting plate 2035, thereby driving the lifting plate 2035 to move downward, and the first flow guide plate 201 is driven to move downward by the lifting rod.

[0067] S4: when the pressure pulsation data does not drop to the set range, the control system controls the second driver 2029 to start, so that the second flow guide plate 202 extends to one side of the gate 105, and the right end of the second flow guide plate 202 exceeds the right side surface of the gate 105.

[0068] Specifically, the second driver 2029 drives the adjusting rod 2028 to rotate, the adjusting rod 2028 drives the adjusting gear 2027 to rotate, and since the adjusting gear 2027 is in meshing transmission with the rack structure of the telescopic arm 2021, the second flow guide plate 202 is driven to extend.

[0069] While the foregoing description has described specific embodiments of the application, one ordinary skill in the art will appreciate that various modifications and changes can be made thereto without departing from the spirit and scope of the application, which is defined by the appended claims.

Claims

1. An automatic monitoring and adjustment system for tailwater gates of a pumped storage power station, characterized in that: The invention comprises a regulating assembly (200) for being installed on the upstream side of a gate assembly (100), wherein the regulating assembly (200) comprises a first guide plate (201), the first guide plate (201) being arranged in a tailwater pipe tunnel (101), a lifting mechanism (203) for driving the first guide plate (201) to rise and fall, and being installed in a tailwater gate hole (102), a power output end of the lifting mechanism (203) passing downward through a concrete foundation (103) and then being connected and fixed to the first guide plate (201), and a right end of the first guide plate (201) being flush with a left surface of the gate (105).

2. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 1 is characterized in that: The first guide plate (201) comprises a first main plate (2013), and a first arc surface (2011) and a second arc surface (2012) are respectively provided at the left and right ends of the first main plate (2013), the first arc surface (2011) and the second arc surface (2012) being centrally symmetrical, and the arc surfaces face the bottom of the tailwater tunnel (101).

3. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 2 is characterized in that: The central angles corresponding to the first arc surface (2011) and the second arc surface (2012) are between 10° and 30°.

4. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 2 is characterized in that: Elastic plates are fixedly mounted on the first arc surface (2011) and the second arc surface (2012); the elastic plates include a rubber plate and a silicone plate.

5. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 2 is characterized in that: The length of the first main plate (2013) is not less than 2 times the thickness of the gate (105), the width is 0.8 to 0.9 times the width of the tailwater tunnel (101), and the thickness is 5 to 15 mm.

6. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 5 is characterized in that: The first main board (2013) is provided with hexagonal closely spaced circular holes.

7. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 1 is characterized in that: The lifting mechanism (203) comprises a lifting rod, a lifting plate (2035), a power rod (2036) and a driver (2037). At least three lifting rods are provided. The lower end of each lifting rod is connected and fixed to the first guide plate (201), and the upper end is movable through the concrete foundation (103) and then connected and fixed to the lifting plate (2035) in the tailwater gate hole (102). A longitudinal power rod (2036) is installed in the middle of the lifting plate (2035) through threaded engagement. The power rod (2036) is connected and driven by the output shaft of the driver (2037). The power rod (2036) can rotate under the drive of the driver (2037). The driver (2037) is fixedly installed in the tailwater gate hole (102).

8. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 7 is characterized in that: A base (2038) is installed in the tailwater gate hole (102), a driver (2037) is installed on the base (2038), a lifting rod passes through a preset hole on the base (2038), and a scale is provided on the lifting rod. The depth position of the first guide plate (201) is obtained by measuring the scale on the lifting rod at a position flush with the top surface of the base (2038).

9. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 7, characterized in that: A groove (2031) is provided on the upper side of the concrete foundation (103) outside the lifting rod, a first water-stopping device (2032) is installed at the bottom of the groove (2031), a return spring (2033) is installed in the groove (2031), the return spring (2033) is sleeved on the lifting rod, and a limiting cap (2034) is installed on the lifting rod at the top of the return spring (2033).

10. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 1, characterized in that: The regulating assembly (200) further comprises a second guide plate (202), the second guide plate (202) comprising a telescopic arm (2021) and a second main plate (2024), the telescopic arm (2021) being fixedly connected to one end of the second main plate (2024), the second main plate (2024) being slidably mounted on the bottom of the first guide plate (201) via a sliding structure, an adjusting rod (2028) being rotatably mounted on the first guide plate (201), the lower end of the adjusting rod (2028) extending downwardly from the bottom of the first guide plate (201), and an adjusting gear being mounted on the adjusting rod (2028) at the bottom of the first guide plate (201). (2027), a toothed structure is provided on the telescopic arm (2021), the adjusting gear (2027) and the telescopic arm (2021) are engaged for transmission, the upper end of the adjusting rod (2028) moves through the concrete foundation (103) to the tailwater gate hole (102), and the upper end of the adjusting rod (2028) is installed with a second driver (2029), and the second driver (2029) drives the adjusting rod (2028) to rotate, so as to drive the second guide plate (202) to telescopic movement; when the second guide plate (202) is in the extended state, the right end of the second guide plate (202) exceeds the right side surface of the gate (105).

11. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 10, characterized in that: A third arc surface (2022) and a fourth arc surface (2023) are respectively provided at the left and right ends of the second main plate (2024); the third arc surface (2022) and the fourth arc surface (2023) are centrally symmetrical, and the arc surfaces face the bottom of the tailwater tunnel (101).

12. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 11, characterized in that: The central angles corresponding to the third arc surface (2022) and the fourth arc surface (2023) are between 10° and 30°.

13. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 11, characterized in that: Elastic plates are fixedly mounted on the third arc surface (2022) and the fourth arc surface (2023); the elastic plates include a rubber plate and a silicone plate.

14. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 10, characterized in that: The length of the second main plate (2024) is 1 to 2 times the thickness of the gate (105), the width is not less than the width of the first guide plate (201), and the thickness is 5 to 10 mm.

15. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 10, characterized in that: The second main board (2024) is provided with hexagonal closely spaced circular holes.

16. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 10, characterized in that: The sliding structure comprises a guide rail groove (2025) provided on the second guide plate (202), and a guide block (2026) fixedly mounted on the lower side of the first guide plate (201); the guide block (2026) extends into the guide rail groove (2025) in a sliding and guiding manner; the guide block (2026) is provided with a limiting portion at the bottom of the second guide plate (202); the width of the limiting portion is greater than the width of the guide rail groove (2025).

17. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 10, characterized in that: A second water-stopping facility (2030) is provided at the contact point between the regulating rod (2028) and the top of the concrete foundation (103).

18. The automatic monitoring and adjustment system for tailwater gates of a pumped storage power station according to claim 1 or 10, characterized in that: A pressure pulsation sensor is installed on the bottom plate of the gate (105). The cable of the pressure pulsation sensor extends through the inside of the gate (105) to the tailwater gate hole (102) and is electrically connected to the processor module. The pressure pulsation sensor is used to monitor the pressure pulsation of the tailwater gate.

19. A method for automatically monitoring and adjusting the tailwater gate of a pumped storage power station, characterized in that: The automatic monitoring and adjustment system for the tailwater gate of a pumped storage power station according to claim 18 is adopted, and the monitoring and adjustment method comprises the following steps: S1: Obtaining pressure pulsation data at the bottom of the gate (105) through a pressure pulsation sensor on the bottom plate of the gate (105); S2: When the pressure pulsation data exceeds a threshold value, the control system obtains the position data of the opening and closing device (106), and then calculates the height position of the bottom plate of the gate (105) in the tailwater tunnel (101); S3: The control system controls the lifting mechanism (203) to start, driving the first guide plate (201) to move downward, so that the bottom of the first guide plate (201) is flush with the bottom of the gate (105); S4: When the pressure pulsation data does not fall within the set range, the control system controls the second driver (2029) to start, so that the second guide plate (202) extends toward the side of the gate (105), and the right end of the second guide plate (202) exceeds the right side surface of the gate (105).

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