Water inlet garbage intercepting device for hydroelectric power plant unit

Abstract

This utility model relates to the field of waste interception technology and discloses a waste interception device for the inlet of a hydropower plant unit. It includes an inlet channel, a filter screen (two sets) housed within the inlet channel cavity, a fixing component between the two sets of filter screens, a waste discharge component within the fixing component cavity, and a scraper between the two sets of filter screens. An installation cavity is located above the inlet channel, housing a drive unit and a discharge pipe. By setting two sets of filter screens and the fixing groove to form a trapezoidal structure, the filtration area is expanded to improve impurity interception efficiency, and the flushing force of the water flow is used to gather impurities to the front of the fixing groove for subsequent centralized cleaning. Simultaneously, the cylindrical space formed by the fixing groove and the arc-shaped pipe provides a collection area for waste. The scraper, shaped like a fan and fitting against the outer wall of the arc-shaped pipe, combined with its lifting action, can thoroughly clean impurities from the gaps in the filter screens and the outer wall of the arc-shaped pipe, avoiding cleaning dead zones.

Description

Technical Field

[0001] This utility model relates to the field of waste interception technology, and in particular to a waste interception device for the inlet of a hydropower plant unit. Background Technology

[0002] Hydropower plant generating units are the core equipment for electricity production. Their operation depends on a stable and clean water supply. Water must be continuously delivered to the unit through the intake to power the turbine and generate electricity. However, natural water sources (such as rivers and reservoirs) often contain solid impurities such as branches, weeds, plastic fragments, and sand. If these impurities enter the unit with the water flow, they can cause problems ranging from clogging the intake pipes and filters, leading to a decrease in water flow and affecting the unit's power generation efficiency, to more serious damage such as wear and tear on turbine blades, bearings, and other critical components, causing equipment failure and shutdown, or even irreversible damage to the unit, directly threatening the safe and stable operation of the hydropower plant and the continuity of power supply.

[0003] Chinese patent application CN202410846866.8 discloses a garbage interception device for the inlet of a hydropower plant unit, including an inlet tank. A filter plate is fixedly installed on the inner wall of the inlet tank, and two support plates are fixedly installed on the upper part of the inner wall of the inlet tank. The garbage interception device for the inlet of a hydropower plant unit of this invention uses a first motor to drive a first gear to rotate. The first gear meshes with a first toothed plate. During the rotation of the first gear, the plate slides left and right in a first sliding groove, thereby causing the garbage cleaning device to reciprocate left and right in front of the filter plate to clean the intercepted garbage.

[0004] Existing technology devices are quite complex when cleaning garbage in front of the filter screen. They require the garbage cleaning device to be raised and lowered to allow the feed inlet to suck up garbage at different heights. They also require the garbage cleaning device to move back and forth to suck up garbage at different horizontal positions. The device's operating trajectory spans a large range, and it is prone to failure after long-term operation, and the cleaning efficiency is not high. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a garbage interception device for the inlet of a hydropower plant unit, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A waste interception device at the inlet of a hydropower plant unit includes an inlet channel. Two sets of filters are installed within the inlet channel cavity to intercept and filter waste. A fixing component for limiting and fixing the filters is installed between the two sets of filters. A waste discharge component for discharging waste is installed within the fixing component cavity. A scraper is also installed between the two sets of filters. An installation cavity is provided above the inlet channel. A drive unit for lifting and lowering the scraper and a discharge pipe for transferring waste are installed within the installation cavity. The fixing component includes a fixing groove and an arc-shaped pipe. The waste discharge component includes an auger, a stepper motor, and a gearbox. The drive unit includes a lifting plate, a lead screw, and two sets of push rods. The lead screw movably passes through the lifting plate and is in transmission cooperation with the lifting plate. The two sets of push rods are fixedly installed between the lifting plate and the scraper.

[0007] According to the aforementioned garbage interception equipment at the inlet of the hydropower plant unit, the fixed trough is vertically fixedly installed in the inlet channel, two sets of filter screens are located on both sides of the fixed trough, and the two sets of filter screens are fixedly installed between the fixed trough and the inlet channel. The front end of the fixed trough is semi-circular.

[0008] According to the aforementioned garbage interception equipment at the inlet of the hydropower plant unit, the arc-shaped pipe is fixedly installed above the front end of the fixed groove, and the arc-shaped pipe and the cavity of the fixed groove form a cylindrical space.

[0009] According to the aforementioned garbage interception equipment at the inlet of the hydropower plant unit, the scraper is fan-shaped, the inner wall of the scraper is in contact with the outer wall of the arc-shaped pipe, and multiple sets of water passage holes are opened through the top and bottom of the scraper.

[0010] According to the aforementioned garbage interception equipment at the inlet of the hydropower plant unit, the drive unit also includes a top plate and two sets of support columns. The two sets of support columns are fixedly installed at the bottom of the installation cavity, and the top plate is fixedly installed at the top of the two sets of support columns. The support columns are U-shaped, and a servo motor is also fixedly installed at the top of the top plate.

[0011] According to the aforementioned garbage interception equipment at the inlet of the hydropower plant unit, the lifting plate is located below the top plate, and limit blocks are fixedly connected to both ends of the lifting plate. The limit blocks are movably engaged in the U-shaped groove of the corresponding support column. The output shaft of the servo motor movably passes through the top plate and is fixedly connected to the lead screw. The bottom end of the lead screw is movably installed at the bottom end of the installation cavity through the bearing. The lead screw and the lifting plate are perpendicular to each other, and the lifting plate and the scraper are parallel to each other. The push rod movably passes through the installation cavity, and a waterproof sealing ring is provided between the push rod and the installation cavity.

[0012] According to the aforementioned waste interception equipment at the inlet of the hydropower plant unit, the waste discharge component further includes a sleeve. The sleeve, a fixed groove, and an arc-shaped pipe form a cylindrical space that is interconnected. A stepper motor and a gearbox are fixedly installed at the top of the sleeve. An auger is located inside the sleeve cavity. The bottom end of the auger movably passes through the fixed groove and the arc-shaped pipe and is movably installed at the bottom end of the inlet channel cavity. The discharge pipe is in an inclined state and is interconnected with the top of the outer wall of the sleeve. The stepper motor and the gearbox drive the auger to rotate.

[0013] This utility model provides a garbage interception device for the inlet of a hydropower plant unit. It has the following beneficial effects: (1) By setting up two sets of filter screens and fixed troughs to form a trapezoidal structure, the filtration area can be expanded to improve the efficiency of impurity interception. At the same time, the water flow can be used to gather impurities to the front of the fixed trough, which is convenient for subsequent centralized cleaning. Meanwhile, the cylindrical space formed by the fixed trough and the arc-shaped pipe provides a storage area for garbage collection, avoiding the random accumulation of impurities in the water inlet channel, ensuring smooth water inlet and laying the foundation for the cleaning process.

[0014] (2) By setting the scraper to be fan-shaped and in contact with the outer wall of the arc-shaped pipe, and cooperating with the lifting action, the impurities in the filter screen gap and the outer wall of the arc-shaped pipe can be thoroughly cleaned, avoiding cleaning dead corners; the design of the water passage hole on the scraper balances the cleaning function and the water intake demand, ensuring that the water flow passes normally during the cleaning process and ensuring the continuity of water intake for the hydropower plant unit.

[0015] (3) By cooperating with the auger, stepper motor and gearbox in the waste discharge component, the spiral blades actively push the waste, and the discharge method with the inclined discharge pipe effectively avoids the waste sticking and clogging, and improves the discharge efficiency; the through design of the sleeve and the cylindrical space ensures that the waste cleaned by the scraper can smoothly enter the discharge channel, and ensures the continuous and stable operation of the equipment. Attached Figure Description

[0016] Figure 1 This is a perspective view of a garbage interception device at the inlet of a hydropower plant unit according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the installation cavity of a garbage interception device at the inlet of a hydropower plant unit according to the present invention; Figure 3 This is a schematic diagram showing the positional relationship between the fixed components and the filter screen of a garbage interception device at the inlet of a hydropower plant unit according to this utility model; Figure 4 This is a three-dimensional structural diagram of the drive unit of a garbage interception device at the inlet of a hydropower plant unit according to the present invention; Figure 5 This is a schematic diagram showing the positional relationship between the sleeve and the discharge pipe of a garbage interception device at the inlet of a hydropower plant unit according to the present invention.

[0017] Legend: 10. Water inlet channel; 11. Fixing assembly; 12. Filter screen; 13. Waste discharge assembly; 14. Scraper; 15. Mounting cavity; 16. Discharge pipe; 17. Drive unit; 18. Fixing groove; 19. Arc-shaped tube; 20. Support column; 21. Top plate; 22. Servo motor; 23. Lead screw; 24. Lifting plate; 25. Push rod; 26. Limit block; 27. Sleeve; 28. Screw; 29. ​​Stepper motor and gearbox. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] Please see Figure 1-5 As shown, this utility model is a garbage interception device at the water inlet of a hydropower plant unit. It includes a water inlet channel 10, the core function of which is to supply the water required by the hydropower plant unit into the equipment, providing a stable water flow channel for the normal operation of the unit. The water inlet channel 10 is equipped with a filter screen 12 for intercepting and filtering garbage. There are two sets of filter screens 12. The filter screens 12 can block solid impurities such as branches, weeds, and plastic fragments mixed in the water flow through their own filter holes, preventing impurities from entering the unit with the water flow and causing wear or blockage of the equipment. A fixing component 11 for limiting and fixing is provided between the two sets of filter screens 12. The fixing component 11 includes a fixing groove 18 and an arc-shaped tube 19. The fixing groove 18 is vertically fixed in the water inlet channel 10. The two sets of filter screens 12 are located on both sides of the fixing groove 18 and are fixedly installed between the fixing groove 18 and the water inlet channel 10. The front end of the fixing groove 18 is semi-circular. An arc-shaped pipe 19 is fixedly installed above the front end of the fixed groove 18, forming a cylindrical space with the cavity of the fixed groove 18. The filter screen 12 provides the necessary water flow foundation for the overall interception and cleaning of debris, ensuring that the water intake demand of the hydropower plant unit is not affected by the equipment structure. The fixed groove 18 is fixedly installed inside the water inlet channel 10, and two sets of filter screens 12 are fixedly installed between the fixed groove 18 and the water inlet channel 10, ensuring a firm installation and effectively resisting the displacement of the filter screens 12 due to water flow impact, thus preventing filter screen 12 failure. The two sets of filter screens 12 form a trapezoidal shape. Water flows through the two sets of filter screens 12 and washes away impurities on their surface, thereby collecting the impurities in front of the fixed groove 18 for subsequent cleaning and removal.

[0020] like Figure 1 and Figure 3As shown, a scraper 14 is also provided between the two sets of filter screens 12. The scraper 14 is fan-shaped, and its inner wall surface contacts the outer wall surface of the arc-shaped tube 19. Multiple sets of water passage holes are opened through the top and bottom of the scraper 14. By setting the scraper 14, when the scraper 14 moves downward, it pushes the impurities downward, making it easier for the impurities to enter the cavity of the fixed groove 18, avoiding cleaning dead corners, and preventing garbage from accumulating in the gaps and clogging the filter screens 12.

[0021] like Figure 2 and Figure 4 As shown, an installation cavity 15 is provided above the water inlet channel 10. The installation cavity 15 contains a drive unit 17 for lifting and lowering the scraper 14 and a discharge pipe 16 for transferring waste. The drive unit 17 includes a lifting plate 24, a lead screw 23, and two sets of push rods 25. The lead screw 23 movably passes through the lifting plate 24 and is in a transmission engagement with the lifting plate 24, converting the rotational motion of the lead screw 23 into the linear motion of the lifting plate 24, thus achieving precise control of the lifting stroke of the lifting plate 24. The two sets of push rods 25 are fixedly installed between the lifting plate 24 and the scraper 14. By setting the threaded transmission engagement between the lead screw 23 and the lifting plate 24, the lifting stroke of the lifting plate 24 can be precisely controlled by controlling the rotation angle of the lead screw 23, thereby driving the scraper 14 to achieve fixed-stroke cleaning, avoiding excessive lifting and lowering of the scraper 14 leading to structural collision or insufficient lifting and lowering leading to incomplete cleaning.

[0022] like Figure 4 As shown, the drive unit 17 also includes a top plate 21 and two sets of support columns 20. The two sets of support columns 20 are fixedly installed at the bottom of the mounting cavity 15, and the top plate 21 is fixedly installed at the top of the two sets of support columns 20. The support columns 20 are U-shaped, and a servo motor 22 is also fixedly installed at the top of the top plate 21. The lifting plate 24 is located below the top plate 21. Limiting blocks 26 are fixedly connected to both ends of the lifting plate 24. The limiting blocks 26 are movably engaged in the U-shaped grooves of the corresponding support columns 20. The output shaft of the servo motor 22 movably passes through the top plate 21 and is fixedly connected to the lead screw 23. The bottom end of the lead screw 23 is movably installed at the bottom of the mounting cavity 15 through a bearing. The lead screw 23 and the lifting plate 24 are perpendicular to each other, and the lifting plate 24 and the scraper 14 are parallel to each other. The push rod 25 movably passes through the mounting cavity 15, and a waterproof sealing ring is provided between the push rod 25 and the mounting cavity 15. During operation, the servo motor 22 drives the lead screw 23 to rotate, which causes the lifting plate 24 to rise and fall. Limiting blocks 26 are fixedly connected to both sides of the lifting plate 24. The limiting blocks 26 are movably engaged in the corresponding support column 20, so that the lifting plate 24 can only rise and fall in the vertical direction, which plays a limiting and guiding role for the lifting plate 24. The push rod 25 moves through the mounting cavity 15 and a waterproof sealing ring is provided between the push rod 25 and the mounting cavity 15. The lifting plate 24 pushes the scraper 14 to rise and fall synchronously through the push rod 25. The waterproof sealing ring completely blocks the path of water flow from the push rod 25 through which it enters the mounting cavity 15, avoiding moisture, short circuit or corrosion of the internal device.

[0023] like Figure 5 As shown, a waste extraction component 13 for discharging waste is installed inside the cavity of the fixed component 11. The waste extraction component 13 includes an auger 28, a stepper motor, and a gearbox 29. The waste extraction component 13 also includes a sleeve 27, which forms a cylindrical space with the fixed groove 18 and the arc-shaped tube 19. The stepper motor and gearbox 29 are fixedly installed at the top of the sleeve 27. The auger 28 is located inside the cavity of the sleeve 27, and its bottom end movably passes through the fixed groove 18 and the arc-shaped tube 19 and is movably installed at the bottom of the water inlet channel 10. The discharge pipe 16 is in an inclined state and communicates with the top of the outer wall of the sleeve 27. The stepper motor and gearbox 29 drive the auger 28 to rotate. By setting the stepper motor and gearbox 29 and the auger 28, the waste can be moved upward during the rotation of the auger 28. The discharge pipe 16 communicates with the top of the outer wall of the sleeve 27 and is in an inclined state, so the waste is discharged through the discharge pipe 16, improving the overall extraction efficiency.

[0024] It should be noted that a PLC controller and a power supply are also installed inside the mounting cavity 15. The power supply provides power to the servo motor 22, the stepper motor, and the gearbox 29. The PLC controller is electrically connected to the servo motor 22, the stepper motor, and the gearbox 29.

[0025] The implementation principle of this utility model for a garbage interception device at the inlet of a hydropower plant unit is as follows: First, the equipment enters its initial operating state. The power supply provides power to the servo motor 22, stepper motor, gearbox 29, and PLC controller. The PLC controller initializes and enters standby monitoring mode. The water required by the hydropower plant unit enters the equipment through the inlet channel 10. When the water flows through the two sets of filter screens 12, the filter screens 12 intercept solid impurities such as branches, weeds, and plastic fragments mixed in the water flow through their own filter holes, preventing impurities from entering the unit. Since the two sets of filter screens 12 and the fixed tank 18 form a trapezoidal structure, the water flow will generate a scouring force on the impurities on the surface of the filter screens 12 during the flow process, gradually gathering the impurities in the area in front of the fixed tank 18, preparing for subsequent impurity cleaning and collection; at the same time, the cylindrical space formed by the arc-shaped pipe 19 and the cavity of the fixed tank 18 remains unobstructed to receive the impurities to be cleaned later.

[0026] Secondly, after the servo motor 22 starts, it drives the lead screw 23 to rotate. Since the lead screw 23 and the lifting plate 24 are connected by a threaded transmission, the rotational motion of the lead screw 23 is converted into the vertical lifting motion of the lifting plate 24. During this process, the limiting blocks 26 at both ends of the lifting plate 24 slide along the U-shaped groove of the support column 20. The support column 20 plays a limiting and guiding role for the lifting plate 24, ensuring that the lifting plate 24 only moves stably in the vertical direction and avoids horizontal deviation or rotation. The lifting plate 24 drives the scraper 14 to move up and down synchronously through two sets of push rods 25. The scraper 14 is fan-shaped and its inner wall surface is in contact with the outer wall surface of the arc-shaped tube 19. When it moves downward, it pushes the impurities in front of the fixed groove 18 downward, so that the impurities can smoothly enter the cavity of the fixed groove 18. At the same time, the water passage hole on the scraper 14 ensures that the water flows through normally, does not block the water inlet channel 10, and avoids impurities accumulating and clogging the filter screen 12 in the gap between the filter screen 12 and the fixed groove 18. In addition, the waterproof sealing ring at the point where the push rod 25 passes through the mounting cavity 15 always prevents water or moisture from entering the mounting cavity 15, protecting the servo motor 22, lead screw 23 and other drive components from moisture and corrosion.

[0027] Finally, the stepper motor and gearbox 29 start and drive the auger 28 to rotate. The auger 28 is located inside the sleeve 27. When it rotates, it uses spiral blades to transport impurities from the fixed groove 18 upward to the top of the sleeve 27. Since the discharge pipe 16 is inclined and communicates with the top of the outer wall of the sleeve 27, the impurities transported to the top of the sleeve 27 slide out of the equipment along the discharge pipe 16 under the combined action of the pushing force of the auger 28 and gravity, and enter the external waste collection device. After completing one waste discharge cycle, the PLC controller controls the stepper motor and gearbox 29 to stop running, and at the same time controls the servo motor 22 to rotate in reverse, driving the lifting plate 24, push rod 25 and scraper 14 to return to the initial position, and repeating the cleaning work.

[0028] The above embodiments are preferred implementations of this utility model. In addition, this utility model can be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A garbage interception device at the inlet of a hydropower plant unit, comprising an inlet channel (10), characterized in that: The water inlet channel (10) is provided with a filter screen (12) for intercepting and filtering garbage. There are two sets of filter screens (12). A fixing component (11) for limiting and fixing is provided between the two sets of filter screens (12). A garbage discharge component (13) for discharging garbage is provided in the cavity of the fixing component (11). A scraper (14) is also provided between the two sets of filter screens (12). An installation cavity (15) is provided above the water inlet channel (10). Inside the installation cavity (15) is a drive unit (17) for lifting and lowering the scraper (14) and a discharge pipe (16) for transferring garbage. The fixing component (11) includes a fixing groove (18) and an arc tube (19). The waste discharge component (13) includes an auger (28), a stepper motor, and a gearbox (29). The drive unit (17) includes a lifting plate (24), a lead screw (23), and two sets of push rods (25). The lead screw (23) moves through the lifting plate (24) and is in transmission cooperation with the lifting plate (24). The two sets of push rods (25) are fixedly installed between the lifting plate (24) and the scraper (14).

2. The waste interception device at the inlet of a hydropower plant unit according to claim 1, characterized in that: The fixed groove (18) is fixedly installed in the water inlet channel (10) in a vertical state. Two sets of filter screens (12) are located on both sides of the fixed groove (18). The two sets of filter screens (12) are fixedly installed between the fixed groove (18) and the water inlet channel (10). The front end of the fixed groove (18) is semi-circular.

3. The waste interception device at the inlet of a hydropower plant unit according to claim 1, characterized in that: The arc-shaped tube (19) is fixedly installed above the front end of the fixed groove (18), and the arc-shaped tube (19) and the cavity of the fixed groove (18) form a cylindrical space.

4. The waste interception device at the inlet of a hydropower plant unit according to claim 1, characterized in that: The scraper (14) is fan-shaped, and the inner wall of the scraper (14) is in contact with the outer wall of the arc-shaped pipe (19). Multiple sets of water passage holes are opened between the top and bottom of the scraper (14).

5. The waste interception device at the inlet of a hydropower plant unit according to claim 1, characterized in that: The drive unit (17) also includes a top plate (21) and two sets of support columns (20). The two sets of support columns (20) are fixedly installed at the bottom of the mounting cavity (15), and the top plate (21) is fixedly installed at the top of the two sets of support columns (20). The support columns (20) are U-shaped, and a servo motor (22) is also fixedly installed at the top of the top plate (21).

6. The waste interception device at the inlet of a hydropower plant unit according to claim 1, characterized in that: The lifting plate (24) is located below the top plate (21). Limiting blocks (26) are fixedly connected to both ends of the lifting plate (24). The limiting blocks (26) are movably engaged in the U-shaped groove of the corresponding support column (20). The output shaft of the servo motor (22) movably passes through the top plate (21) and is fixedly connected to the lead screw (23). The bottom end of the lead screw (23) is movably installed at the bottom end of the mounting cavity (15) through the bearing. The lead screw (23) and the lifting plate (24) are perpendicular to each other. The lifting plate (24) and the scraper (14) are parallel to each other. The push rod (25) movably passes through the mounting cavity (15) and a waterproof sealing ring is provided between the push rod (25) and the mounting cavity (15).

7. The waste interception device at the inlet of a hydropower plant unit according to claim 1, characterized in that: The waste discharge assembly (13) also includes a sleeve (27), which is connected to the fixed groove (18) and the arc tube (19) to form a cylindrical space. The stepper motor and gearbox (29) are fixedly installed at the top of the sleeve (27). The auger (28) is located inside the cavity of the sleeve (27). The bottom end of the auger (28) moves through the fixed groove (18) and the arc tube (19) and is movably installed at the bottom end of the water inlet channel (10). The discharge pipe (16) is in an inclined state and is connected to the top of the outer wall of the sleeve (27). The stepper motor and gearbox (29) drive the auger (28) to rotate.

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