Limitable gate lifting device for pumped storage power station

Abstract

The invention discloses a limitable gate lifting device for a pumped storage power station, and relates to the technical field of gate opening and closing devices. Comprising lifting assemblies arranged on the two sides of a power station dam body, a gate connected with the lower ends of the lifting assemblies and located in the middle of the power station dam body and limiting assemblies arranged on the left and right side walls of the power station dam body. The gate body drives the adjusting door plate to stretch out and draw back through the first hydraulic cylinder, large-range adjustment of the whole interception area is achieved, vertical guide of gate lifting is achieved through sliding fit of the vertical sliding rod and the sliding sleeve, transverse deviation is further limited through an engaged sawtooth structure, and inclination caused by water flow impact or vibration is avoided; the transverse limiting inserting rod is inserted into the through hole to achieve temporary positioning of the gate, the top limiting inserting plate is embedded into the groove through the protruding block to form hard mechanical limiting, the gate is prevented from overtravel or accidental movement through a double-locking structure, rapid locking can be achieved especially under the emergency working condition, and safety redundancy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gate opening and closing devices, and in particular to a limitable gate lifting device for a pumped storage power station. Background Art

[0002] A hydropower station draws water from high places in a river or other reservoirs, and uses the pressure or flow rate of the water to drive the turbine to rotate, converting gravitational potential energy and kinetic energy into mechanical energy. The turbine then drives the generator to rotate, converting the mechanical energy into electrical energy. A power station is generally composed of four main parts: a water retaining structure, a flood discharge structure, a water diversion structure, and a power station building. A hydropower station generally draws water through gates.

[0003] The gate opening and closing devices of pumped-storage power stations are key equipment for controlling the opening and closing of the gates in the water flow channel. Their performance directly affects the safe operation, peak-shaving efficiency and operating mode transitions of the power station, such as pumping, power generation, and flood discharge. Such devices must meet requirements such as high reliability, high-precision control, and adaptability to frequent operations and complex hydraulic conditions.

[0004] When the existing gate lifting device is in use, the lifting and lowering guide structure of the existing gate may only rely on a single sliding fit and lack a composite guide design. When subjected to water flow impact or equipment vibration, it is easy to produce lateral displacement or tilt. Long-term use may cause structural wear and jamming, affecting the stability of gate operation. Summary of the Invention

[0005] In view of the above-mentioned problems, the present invention provides a limitable gate lifting device for a pumped storage power station.

[0006] The technical solution of the present invention is a limitable gate lifting device for a pumped storage power station, comprising lifting assemblies arranged on both sides of the power station dam body, a gate connected to the lower end of the lifting assemblies and located in the middle of the power station dam body, and limit assemblies arranged on the left and right side walls of the power station dam body;

[0007] There are vertical grooves on the left and right sides of the power station dam;

[0008] The lifting assembly includes a horizontal truss with both ends connected to the upper end of the power station dam body through connecting vertical rods, and an electric telescopic rod for connecting the horizontal truss and the gate;

[0009] The gate includes a middle door frame and two adjustable door panels connected to the front and rear sides of the middle door frame through a first hydraulic cylinder;

[0010] The limiting assembly includes several vertical sliding rods arranged in the vertical groove, several sliding sleeves arranged on the side walls of the middle door frame and slidingly connected to each of the vertical sliding rods, a vertical mounting plate connected to the inner wall of the vertical groove through a horizontally placed second hydraulic cylinder, several horizontal limiting plug rods arranged on the side walls of the vertical mounting plate and corresponding to the vertical sliding rods, an installation bin arranged on the upper side of each vertical groove, a limiting plug plate connected to the inner wall of the installation bin through a third hydraulic cylinder, and through holes are provided on the vertical sliding rods and the sliding sleeves.

[0011] Furthermore, each of the adjusting door panels is provided with several first vertical slots parallel to each other in the horizontal direction, and a flood discharge vertical plate is hinged in each corresponding first vertical slot on the adjusting door panel on the front side, and a winding roller driven by a motor is provided at the bottom end of the horizontal truss, and the winding roller is connected to the side walls of each flood discharge vertical plate by a winding rope.

[0012] Description: When a small-flow flood discharge is required, the motor can be used to control the winding roller to rotate forward, so that the winding rope drives each flood discharge vertical plate to rotate, thereby opening part of the flood discharge channel. If the flood discharge channel needs to be closed, the motor drives the winding roller to reverse, so that the flood discharge vertical plate is reset and engaged with the first vertical slot. This structure is integrated into the adjustment door panel and does not affect the overall lifting function of the gate. When the gate is in a closed or partially open state, a small-flow flood discharge can be achieved through the flood discharge vertical plate alone, which makes up for the shortcomings of traditional gates in opening adjustment and effectively improves the adaptability and reliability of the gate in small-flow regulation scenarios. It is an important supplement to the gate function of pumped-storage power stations.

[0013] Furthermore, the flood discharge vertical plate includes a buckling plate buckled to the outer wall of the first vertical slot, an inner plug-in block arranged in the buckling plate and abutting against the inner wall of the first vertical slot, and an electromagnetic suction cup is provided at the bottom end of the buckling plate.

[0014] Note: The snap-fit ​​design between the snap-fit ​​plate and the outer wall of the first vertical slot can enhance the sealing when the flood discharge vertical plate is closed. The inner plug-in block is inserted into the first vertical slot to further enhance the structural stability. After the flood discharge vertical plate is reset, the electromagnetic suction cup is energized and adsorbed on the surface of the adjustment door panel to avoid loosening caused by water impact.

[0015] Furthermore, the adjustable door panel is provided with a plurality of second vertical slots staggered with the first vertical slots, and a constant temperature heating plate is provided in the second vertical slots.

[0016] Note: The constant temperature heating plate in the second vertical slot is mainly used in cold areas or low temperature environments. It prevents ice from forming on the surface of the regulating door panel by generating heat through electricity. It is staggered with the first vertical slot and can evenly cover the key areas of the regulating door panel to ensure that the gate can still be opened and closed normally in low temperatures and avoid damage to the gate structure by ice.

[0017] Furthermore, the front and rear sides of the middle door frame are provided with a first folding reinforcement frame connected to each of the adjustable door panels, and the bottom end of the horizontal truss and the left and right sides of the electric telescopic rod are provided with a second folding reinforcement frame connected to the upper end of the middle door frame.

[0018] Description: The first folding reinforcement frame connects the middle door frame and the adjustable door panel. When the first hydraulic cylinder drives the adjustable door panel to extend or retract, the first folding reinforcement frame expands or contracts synchronously, which does not affect the movement of the adjustable door panel and enhances the rigidity of the connection between the two, preventing the adjustable door panel from being deformed due to the impact of water flow. The second folding reinforcement frame is located on both sides of the electric telescopic rod, connecting the horizontal truss and the middle door frame. It folds or expands synchronously during the gate lifting process, assisting the rotating connecting rod to share the gravity of the gate, reducing the load-bearing pressure of the rotating connecting rod, and improving the stability of the overall lifting mechanism.

[0019] Furthermore, the outer wall of the vertical sliding rod is provided with a plurality of first serrations along the circumferential direction, and the inner wall of the sliding sleeve is provided with second serrations engaged with the first serrations.

[0020] Description: The first serrations on the outer wall of the vertical sliding rod mesh with the second serrations on the inner wall of the sliding sleeve. This can limit the relative sliding of the two by tooth engagement when the gate is raised or lowered, preventing the gate from lateral displacement due to water flow impact or vibration, while enhancing the guiding accuracy of the limit assembly on the gate.

[0021] Furthermore, the side wall of the limiting plug plate is provided with several limiting protrusions, and the left and right sides of the adjusting door panel are provided with several limiting grooves corresponding to the limiting protrusions one by one. The surfaces of the limiting protrusions and the limiting grooves are sprayed with a wear-resistant coating, and the thickness of the wear-resistant coating is 0.8-1.2mm.

[0022] Description: When the limit plug is driven by the third hydraulic cylinder to be inserted into the top of the gate, the limit protrusion is engaged with the limit groove of the adjusting door plate to form a double limit structure. The wear-resistant coating can reduce the loss caused by long-term contact friction between the two and extend the service life.

[0023] Furthermore, a sealing strip is provided at the bottom end of the adjustable door panel, a horizontal mounting frame is installed at the bottom end of the side wall of the adjustable door panel, a mesh salvage frame is movably mounted on the horizontal mounting frame, and a blocking cover plate is hinged at the bottom end of the mesh salvage frame.

[0024] Description: The mesh salvage frame is installed in the horizontal installation frame at the bottom of the adjustable gate panel. It can intercept floating objects in the water when the gate is lowered. When the intercepted floating objects accumulate to a certain amount, the sealing cover can be opened for cleaning.

[0025] Furthermore, a horizontal rotating shaft is provided at the upper end of the horizontal mounting frame and located at the upper end of the mesh salvage frame. Several crushing blades are provided on the horizontal rotating shaft along the length direction. The horizontal rotating shaft is driven to rotate by a motor, and the edges of the crushing blades are serrated.

[0026] Description: The serrated crushing blades on the horizontal rotating shaft rotate under the drive of the motor, which can break up larger floating objects into small pieces to prevent them from clogging the mesh salvage frame or blocking the gate. The broken small pieces of floating objects enter the mesh salvage frame with the water flow, which is convenient for subsequent centralized cleaning.

[0027] The beneficial effects of the present invention are:

[0028] (1) When the limitable pumped storage power station gate lifting device of the present invention is in use, the gate body is driven by the first hydraulic cylinder to adjust the door plate to extend and retract, so as to achieve a large range of adjustment of the overall interception area. The vertical sliding rod and the sliding sleeve are slidably matched to realize the vertical guidance of the gate lifting and lowering. The meshing serrated structure further limits the lateral deviation to avoid tilting caused by water flow impact or vibration. The lateral limit plug rod is inserted into the through hole to realize temporary positioning of the gate. The top limit plug plate is engaged with the protrusion and the groove to form a hard mechanical limit. The double locking structure prevents the gate from overtravel or accidental movement, especially in emergency conditions. It can be quickly locked to improve safety redundancy; the two adjustable door plates can be extended and retracted independently or synchronously by the first hydraulic cylinder. When the first hydraulic cylinder is extended, the adjustable door plates are expanded to both sides of the middle door frame to increase the overall interception area of ​​the gate, which is suitable for high water level and large flow interception scenarios. When the first hydraulic cylinder is retracted, the adjustable door plates are retracted to the middle door frame to reduce the interception area, so that the downstream flow can be accurately controlled;

[0029] (2) When a small-flow flood discharge is required, the motor can be used to control the winding roller to rotate forward, so that the winding rope drives each flood discharge vertical plate to rotate, thereby opening part of the flood discharge channel. If the flood discharge channel needs to be closed, the motor drives the winding roller to reverse, so that the flood discharge vertical plate is reset and engaged with the first vertical slot. This structure is integrated into the adjustment door plate and does not affect the overall lifting function of the gate. When the gate is in a closed or partially open state, a small-flow flood discharge can be achieved through the flood discharge vertical plate alone, which supplements the shortcomings of traditional gates in opening adjustment and effectively improves the adaptability and reliability of the gate in small-flow regulation scenarios. It is an important supplement to the gate function of pumped storage power stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the first overall structure of the present invention;

[0031] Figure 2 It is a second overall structural schematic diagram of the present invention;

[0032] Figure 3This is a schematic diagram of the structure of the gate when the flood discharge vertical plate and the constant temperature heating plate of the present invention are not installed;

[0033] Figure 4 This is a schematic diagram of the structure of the gate when the flood discharge vertical plate and the constant temperature heating plate of the present invention are installed;

[0034] Figure 5 This is a side view of the installation of the flood discharge vertical plate of the present invention on the adjustment door panel;

[0035] Figure 6 is a side view of the gate of the present invention;

[0036] Figure 7 It is a top view of the installation of the vertical sliding rod and the sliding sleeve of the present invention.

[0037] Among them, 1-power station dam body, 10-vertical groove, 2-lifting assembly, 20-connecting vertical rod, 21-horizontal truss, 210-second folding reinforcement frame, 22-electric telescopic rod, 3-gate, 30-middle door frame, 31-adjusting door plate, 310-first hydraulic cylinder, 311-first vertical slot, 312-flood discharge vertical plate, 3120-buckle plate, 3121-internal plug-in block, 3122-electromagnetic suction cup, 313-winding roller, 314-winding rope, 315-second vertical slot, 316-constant temperature heating plate, 31 7-limiting groove, 32-first folding reinforcement frame, 33-sealing strip, 34-horizontal mounting frame, 35-mesh salvage frame, 350-blocking cover, 36-horizontal rotation axis, 360-crushing blade, 4-limiting assembly, 40-vertical sliding rod, 400-through hole, 401-first serration, 402-second serration, 41-sliding sleeve, 42-vertical mounting plate, 420-second hydraulic cylinder, 43-lateral limiting plug, 44-installation compartment, 45-limiting plug, 450-third hydraulic cylinder, 451-limiting protrusion. DETAILED DESCRIPTION

[0038] Example 1

[0039] like Figure 1 、 2 As shown, a limitable gate lifting device for a pumped storage power station includes a lifting assembly 2 provided on both sides of a dam body 1 of the power station, a gate 3 connected to the lower end of the lifting assembly 2 and located in the middle of the dam body 1 of the power station, and a limit assembly 4 provided on the left and right side walls of the dam body 1 of the power station;

[0040] Vertical grooves 10 are provided on the left and right sides of the power station dam body 1;

[0041] The lifting assembly 2 includes a horizontal truss 21 connected to the upper end of the power station dam body 1 at both ends through a connecting vertical rod 20, and an electric telescopic rod 22 for connecting the horizontal truss 21 and the gate 3. The electric telescopic rod 22 adopts existing technology, for example, the electric telescopic rod of model XC800 can be used;

[0042] like Figure 3 、 4 As shown in FIG6 , the gate 3 includes an intermediate door frame 30 and two adjustable door plates 31 connected to the front and rear sides of the intermediate door frame 30 through a first hydraulic cylinder 310 , wherein the first hydraulic cylinder 310 adopts existing technology, for example, an existing piston hydraulic cylinder can be used;

[0043] The limiting assembly 4 includes three vertical sliding rods 40 arranged in the vertical groove 10, three sliding sleeves 41 arranged on the side walls of the middle door frame 30 and slidingly connected to each vertical sliding rod 40, a vertical mounting plate 42 connected to the inner wall of the vertical groove 10 through a horizontally placed second hydraulic cylinder 420, two horizontal limiting plugs 43 arranged on the side walls of the vertical mounting plate 42 and corresponding to the vertical sliding rod 40, a mounting bin 44 arranged on the upper side of each vertical groove 10, and a limiting plug 45 connected to the inner wall of the mounting bin 44 through a third hydraulic cylinder 450. A through hole 400 is provided on the vertical sliding rod 40 and the sliding sleeve 41, wherein the second hydraulic cylinder 420 and the third hydraulic cylinder 450 can adopt existing piston hydraulic cylinders.

[0044] Example 2

[0045] This embodiment discloses a method for using the limitable pumped storage power station gate lifting device of the embodiment, comprising the following steps:

[0046] S1, the horizontal truss 21 is fixed to the upper end of the power station dam body 1 by connecting the vertical rods 20, serving as the installation foundation of the lifting power and providing stable support. When the electric telescopic rod 22 is extended or shortened, it directly drives the gate 3 to rise and open or fall and close in the vertical direction, realizing the overall lifting and lowering control of the gate 3;

[0047] S2. The vertical sliding rods 40 in the vertical groove 10 correspond one-to-one with the sliding sleeves 41 on the side wall of the middle door frame 30, and the sliding sleeves 41 can slide freely along the vertical sliding rods 40. When the gate 3 is raised or lowered, the sliding sleeves 41 move synchronously along the vertical sliding rods 40 to limit the horizontal deviation of the gate 3 as a whole;

[0048] S3. When the gate 3 is raised or lowered to a preset position and needs to be temporarily fixed, the second hydraulic cylinder 420 drives the vertical mounting plate 42 to move horizontally, driving the horizontal limit rod 43 to insert into the through hole 400. The mechanical latch structure locks the two together, preventing the gate 3 from moving further and achieving temporary positioning;

[0049] S4. When the gate 3 rises to the highest open position or needs to stop rising urgently, the third hydraulic cylinder 450 in the installation chamber 44 extends, pushing the limit plate 45 outward to abut against the side wall of the middle door frame 30, forming a rigid mechanical limit.

[0050] S5. The two adjusting door panels 31 can be extended and retracted independently or synchronously by the first hydraulic cylinder 310. When the first hydraulic cylinder 310 is extended, the adjusting door panels 31 are expanded to both sides of the middle door frame 30, thereby increasing the overall interception area of ​​the gate 3, which is suitable for interception scenarios with high water levels and large flows. When the first hydraulic cylinder 310 is retracted, the adjusting door panels 31 are retracted to the middle door frame 30, thereby reducing the interception area and accurately controlling the downstream flow.

[0051] Example 3

[0052] Each regulating gate plate 31 is provided with four first vertical slots 311 parallel to each other in the horizontal direction, and a flood discharge vertical plate 312 is hinged in each corresponding first vertical slot 311 on the regulating gate plate 31 on the front side. A winding roller 313 driven by a motor is provided at the bottom end of the horizontal truss 21. The winding roller 313 is connected to the side wall of each flood discharge vertical plate 312 by a winding rope 314. When the gate 3 is in a closed or partially open state, a small flow can be discharged through the flood discharge vertical plate 312 alone, which makes up for the shortcomings of the traditional gate 3 in opening adjustment, effectively improves the adaptability and reliability of the gate 3 in small flow adjustment scenarios, and is an important supplement to the gate function of the pumped storage power station.

[0053] like Figure 5 As shown, the flood discharge vertical plate 312 includes a buckling plate 3120 buckled to the outer wall of the first vertical slot 311, an inner plug-in block 3121 provided in the buckling plate 3120 and abutting the inner wall of the first vertical slot 311, and an electromagnetic suction cup 3122 is provided at the bottom end of the buckling plate 3120. The buckling design of the buckling plate 3120 and the outer wall of the first vertical slot 311 can enhance the sealing of the flood discharge vertical plate 312 when it is closed. The inner plug-in block 3121 is inserted into the interior of the first vertical slot 311 to further improve the structural stability. After the flood discharge vertical plate 312 is reset, the electromagnetic suction cup 3122 is energized and adsorbed on the surface of the adjustment door panel 31 to prevent loosening caused by water impact. The electromagnetic suction cup 3122 adopts existing technology, for example, an existing X61 type electromagnetic suction cup can be used;

[0054] The adjusting door panel 31 is provided with three second vertical slots 315 which are staggered with the first vertical slots 311. A constant temperature heating plate 316 is provided in the second vertical slots 315. The constant temperature heating plate 316 in the second vertical slots 315 is mainly used in cold areas or low temperature environments. It prevents ice from forming on the surface of the adjusting door panel 31 by heating it with electricity. It is staggered with the first vertical slots 311 and can evenly cover the key areas of the adjusting door panel 31 to ensure that the gate 3 can still be opened and closed normally at low temperatures, and to avoid damage to the structure of the gate 3 by the ice layer. The constant temperature heating plate 316 adopts existing technology. For example, a constant temperature heating plate with model ET-305F can be used.

[0055] Example 4

[0056] The difference between this embodiment and embodiment 2 is that:

[0057] S6. When a small amount of flood discharge is required, the winding roller 313 can be controlled by the motor to rotate forward, so that the winding rope 314 drives each flood discharge vertical plate 312 to rotate, thereby opening part of the flood discharge channel. If the flood discharge channel needs to be closed, the motor drives the winding roller 313 to reverse, so that the flood discharge vertical plate 312 is reset and engaged with the first vertical slot 311. This structure is integrated on the adjusting door panel 31 and does not affect the overall lifting function of the gate 3. When the gate 3 is in a closed or partially open state, a small amount of flood discharge can be achieved through the flood discharge vertical plate 312 alone. The constant temperature heating plate 316 in the second vertical slot 315 is mainly used in cold areas or low temperature environments. It prevents the surface of the adjusting door panel 31 from freezing by heating it with electricity. It is staggered with the first vertical slot 311 and can evenly cover the key area of ​​the adjusting door panel 31 to ensure that the gate 3 can still be opened and closed normally at low temperatures.

[0058] Example 5

[0059] The difference between this embodiment and embodiment 3 is that:

[0060] like Figure 6 As shown, the front and rear sides of the middle door frame 30 are provided with a first folding reinforcement frame 32 connected to each adjusting door panel 31, and the bottom end of the horizontal truss 21 and the left and right sides of the electric telescopic rod 22 are provided with a second folding reinforcement frame 210 connected to the upper end of the middle door frame 30. The first folding reinforcement frame 32 connects the middle door frame 30 and the adjusting door panel 31. When the first hydraulic cylinder 310 drives the adjusting door panel 31 to extend or retract, the first folding reinforcement frame 32 is synchronously expanded or contracted, which neither affects the movement of the adjusting door panel 31 nor enhances the rigidity of the connection between the two, thereby preventing the adjusting door panel 31 from being deformed due to the impact of water flow. The second folding reinforcement frame 210 is located on both sides of the electric telescopic rod 22, connecting the horizontal truss 21 and the middle door frame 30, and synchronously folds or expands during the lifting process of the gate 3, assisting the rotating connecting rod 22 to share the gravity of the gate 3, reducing the bearing pressure of the rotating connecting rod 22, and improving the stability of the overall lifting mechanism.

[0061] like Figure 7 As shown, the outer wall of the vertical sliding rod 40 is provided with 20 first serrations 401 along the circumferential direction, and the inner wall of the sliding sleeve 41 is provided with second serrations 402 that mesh with the first serrations 401. The first serrations 401 on the outer wall of the vertical sliding rod 40 and the second serrations 402 on the inner wall of the sliding sleeve 41 mesh with each other, and the teeth can limit the relative sliding of the two when the gate 3 is raised or lowered through the engagement of the teeth, thereby preventing the gate 3 from being lateral deflected by the impact or vibration of the water flow, and at the same time enhancing the guiding accuracy of the limit assembly 4 on the gate 3.

[0062] The side wall of the limiting plug plate 45 is provided with 9 limiting protrusions 451, and the left and right sides of the adjusting door panel 31 are provided with 9 limiting grooves 317 corresponding to the limiting protrusions 451. The surfaces of the limiting protrusions 451 and the limiting grooves 317 are sprayed with a wear-resistant coating, and the thickness of the wear-resistant coating is 0.8 mm. When the limiting plug plate 45 is driven by the third hydraulic cylinder 450 to be inserted into the top of the gate 3, the limiting protrusions 451 are engaged with the limiting grooves 310 of the adjusting door panel 31 to form a double limiting structure. The wear-resistant coating such as tungsten carbide coating can reduce the loss caused by long-term contact friction between the two and extend the service life. Among them, the third hydraulic cylinder 450 adopts existing technology, for example, an existing piston hydraulic cylinder can be used, and the wear-resistant coating can adopt one of the existing high chromium cast iron, nickel-chromium alloy or iron-nickel alloy.

[0063] Example 6

[0064] The difference between this embodiment and embodiment 4 is that:

[0065] In step S5, the first folding reinforcement frame 32 connects the middle door frame 30 and the adjustable door panel 31. When the first hydraulic cylinder 310 drives the adjustable door panel 31 to extend or retract, the first folding reinforcement frame 32 is synchronously expanded or retracted. The second folding reinforcement frame 210 is located on both sides of the electric telescopic rod 22, connecting the horizontal truss 21 and the middle door frame 30. When the gate 3 is raised or lowered, it is synchronously folded or expanded to assist the rotating connecting rod 22 in sharing the gravity of the gate 3 and reducing the load-bearing pressure of the rotating connecting rod 22.

[0066] In step S4 , the third hydraulic cylinder 450 in the installation chamber 44 extends, pushing the limiting plug plate 45 outward, and the limiting protrusion 451 engages with the limiting groove 310 of the adjustment door panel 31 to form a double limiting structure.

[0067] Example 7

[0068] The difference between this embodiment and embodiment 5 is that:

[0069] The thickness of the wear-resistant coating is 1.2 mm.

[0070] Example 8

[0071] The difference between this embodiment and embodiment 7 is that:

[0072] like Figure 1 、 2 As shown, a sealing strip 33 is provided at the bottom end of the adjusting door panel 31, and a horizontal mounting frame 34 is installed at the bottom end of the side wall of the adjusting door panel 31. A mesh salvage frame 35 is movably mounted on the horizontal mounting frame 34, and a blocking cover 350 is hinged at the bottom end of the mesh salvage frame 35. The mesh salvage frame 35 is installed in the horizontal mounting frame 34 at the bottom end of the adjusting door panel 31. When the gate 3 is lowered, it can intercept floating objects in the water, such as branches and garbage. When the intercepted floating objects accumulate to a certain amount, the blocking cover 350 can be opened for cleaning.

[0073] A horizontal rotating shaft 36 is provided at the upper end of the horizontal mounting frame 34 and at the upper end of the mesh salvage frame 35. Twenty-five crushing blades 360 are provided along the length direction of the horizontal rotating shaft 36. The horizontal rotating shaft 36 is driven to rotate by a motor. The edges of the crushing blades 360 are serrated. The serrated crushing blades 360 on the horizontal rotating shaft 36 rotate under the drive of the motor, which can break larger floating objects such as tree trunks into small pieces to prevent them from clogging the mesh salvage frame 35 or blocking the gate 3. The crushed small pieces of floating objects enter the mesh salvage frame 35 with the water flow, which is convenient for subsequent centralized cleaning.

[0074] Example 9

[0075] The difference between this embodiment and embodiment 6 is that:

[0076] S7. When the gate 3 descends, it can intercept floating objects in the water, such as branches and garbage. When the intercepted floating objects accumulate to a certain amount, the blocking cover 350 can be opened for cleaning. The serrated crushing blades 360 on the horizontal rotating shaft 36 rotate under the drive of the motor, which can crush larger floating objects such as tree trunks into small pieces to prevent them from clogging the mesh salvage frame 35 or blocking the gate 3. The crushed small pieces of floating objects enter the mesh salvage frame 35 with the water flow, which is convenient for subsequent centralized cleaning.

Claims

1. A gate lifting device for a pumped storage power station with limitable position, characterized in that: It comprises lifting assemblies (2) arranged on both sides of a power station dam body (1), a gate (3) connected to the lower end of the lifting assemblies (2) and located in the middle of the power station dam body (1), and limiting assemblies (4) arranged on the left and right side walls of the power station dam body (1); Vertical grooves (10) are respectively provided on the left and right sides of the power station dam body (1); The lifting assembly (2) comprises a horizontal truss (21) whose two ends are connected to the upper end of the power station dam body (1) through connecting vertical rods (20), and an electric telescopic rod (22) for connecting the horizontal truss (21) and the gate (3); The gate (3) comprises a middle door frame (30), and two adjustment door panels (31) connected to the front and rear sides of the middle door frame (30) via a first hydraulic cylinder (310); The limiting assembly (4) comprises a plurality of vertical sliding rods (40) arranged in the vertical groove (10), a plurality of sliding sleeves (41) arranged on the side wall of the middle door frame (30) and slidingly connected to each of the vertical sliding rods (40), a vertical mounting plate (42) connected to the inner wall of the vertical groove (10) via a horizontally placed second hydraulic cylinder (420), a plurality of transverse limiting plug rods (43) arranged on the side wall of the vertical mounting plate (42) and corresponding to the vertical sliding rods (40), a mounting chamber (44) arranged on the upper side of each vertical groove (10), and a limiting plug plate (45) connected to the inner wall of the mounting chamber (44) via a third hydraulic cylinder (450), and a through hole (400) is provided on both the vertical sliding rod (40) and the sliding sleeve (41).

2. A position-limited pumped storage power station gate lifting device according to claim 1, characterized in that: Each of the adjusting door panels (31) is provided with a plurality of first vertical slots (311) parallel to each other in the horizontal direction, and a flood discharge vertical plate (312) is hingedly connected in each corresponding first vertical slot (311) on the adjusting door panel (31) located on the front side. A winding roller (313) driven by a motor is provided at the bottom end of the horizontal truss (21), and the winding roller (313) is connected to the side wall of each flood discharge vertical plate (312) via a winding rope (314).

3. A position-limited pumped storage power station gate lifting device according to claim 2, characterized in that: The flood discharge vertical plate (312) includes a buckling plate (3120) buckled to the outer wall of the first vertical slot (311), an inner plug-in block (3121) arranged in the buckling plate (3120) and abutting against the inner wall of the first vertical slot (311), and an electromagnetic suction cup (3122) is provided at the bottom end of the buckling plate (3120).

4. A position-limited pumped storage power station gate lifting device according to claim 2, characterized in that: The regulating door panel (31) is provided with a plurality of second vertical slots (315) staggered with the first vertical slots (311), and a constant temperature heating plate (316) is provided in the second vertical slots (315).

5. The position-limitable pumped storage power station gate lifting device according to claim 1, characterized in that: The front and rear sides of the middle door frame (30) are provided with first folding reinforcement frames (32) connected to the respective adjustable door panels (31); the bottom end of the horizontal truss (21) and the left and right sides of the electric telescopic rod (22) are provided with second folding reinforcement frames (210) connected to the upper end of the middle door frame (30).

6. The position-limitable pumped storage power station gate lifting device according to claim 1, characterized in that: The outer wall of the vertical sliding rod (40) is provided with a plurality of first saw teeth (401) along the circumferential direction, and the inner wall of the sliding sleeve (41) is provided with second saw teeth (402) engaged with the first saw teeth (401).

7. The position-limitable pumped storage power station gate lifting device according to claim 1, characterized in that: The side wall of the limiting plug plate (45) is provided with a plurality of limiting protrusions (451), and the left and right sides of the adjusting door panel (31) are provided with a plurality of limiting grooves (317) corresponding to the limiting protrusions (451) one by one. The surfaces of the limiting protrusions (451) and the limiting grooves (317) are sprayed with a wear-resistant coating, and the thickness of the wear-resistant coating is 0.8-1.2 mm.

8. The position-limitable pumped storage power station gate lifting device according to claim 1, characterized in that: The bottom end of the adjusting door panel (31) is provided with a sealing strip (33), the bottom end of the side wall of the adjusting door panel (31) is provided with a horizontal mounting frame (34), a mesh salvage frame (35) is movably mounted on the horizontal mounting frame (34), and the bottom end of the mesh salvage frame (35) is hinged with a blocking cover plate (350).

9. The position-limitable pumped storage power station gate lifting device according to claim 8, characterized in that: A horizontal rotating shaft (36) is provided at the upper end of the horizontal mounting frame (34) and located at the upper end of the mesh salvaging frame (35). A plurality of crushing blades (360) are provided on the horizontal rotating shaft (36) along the length direction. The horizontal rotating shaft (36) is driven to rotate by a motor, and the edges of the crushing blades (360) are serrated.

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