Trash grating assembly for pumped storage power station

Abstract

The invention discloses a trash holding grating assembly for a pumped storage power station, and the trash holding grating assembly for the pumped storage power station comprises a flow guide part which is internally provided with a channel suitable for fluid circulation; the trash rack covers at least part of the inlet of the channel, and a plurality of through via holes are formed in the trash rack so as to be suitable for blocking sundries entering the channel; the buffering piece is connected between the flow guide part and the trash rack, and the buffering piece can deform in the extending direction of the channel so as to adjust the relative position between the trash rack and the flow guide part. The mechanical performance of the trash grating assembly can be optimized, and the impact resistance of the trash grating assembly is improved.

Description

Technical Field

[0001] The present application relates to the field of trash screens, and in particular to a trash screen assembly for a pumped storage power station. Background Art

[0002] At present, pumped storage power stations are a type of hydropower station that uses surplus electricity to pump water from the lower reservoir to the upper reservoir during the low-peak period of power consumption in the power system, converts the electricity into water potential energy and stores it, and releases water from the upper reservoir to the lower reservoir during the peak period of power consumption to generate electricity, and then converts the water potential energy into electricity. Pumped storage is the most mature technology and the most suitable for large-scale development of green, low-carbon, clean and flexible power source for the power system. It plays a significant role in peak-shaving, valley-filling, frequency regulation, phase regulation and emergency standby of power grid dispatching, and has a good effect in coordination with wind power, solar power generation, nuclear power, thermal power, etc.

[0003] The lower reservoir of a pumped-storage power station is generally located in a river valley with large surface river runoff. The surface river runoff can replenish water for the pumped-storage power station.

[0004] However, some existing trash rack designs have the problem of simple overall structure and poor impact resistance. When faced with the impact of high-velocity fluids or large floating objects during flood seasons, these trash racks and related structures are prone to deformation or even damage, which not only affects the pumping effect, but also may increase operation and maintenance costs due to frequent repairs and replacements. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a trash screen assembly for a pumped storage power station, which can optimize the stress performance of the trash screen assembly and improve the impact resistance of the trash screen assembly.

[0006] A trash screen assembly for a pumped-storage power station according to an embodiment of the present application includes: a guide portion, in which a channel suitable for fluid circulation is formed; a trash rack, which covers at least a portion of the entrance of the channel and is formed with a plurality of through holes to block debris from entering the channel; and a buffer member, which is connected between the guide portion and the trash rack and can be deformed along the extension direction of the channel to adjust the relative position between the trash rack and the guide portion.

[0007] According to the trash rack assembly for a pumped storage power station according to the embodiment of the present application, a buffer is arranged between the guide part and the trash rack, and the buffer is deformed in the extension direction of the channel. When the trash rack is impacted, the buffer can help the trash rack assembly to disperse the dilution part of the impact force to adjust the relative position between the trash rack and the guide part, so that the trash rack is more stable when facing the impact of high-speed fluid or debris, reducing the risk of damage or deformation caused by impact, thereby extending the service life of the assembly. This has significant economic benefits for long-term operation of pumped storage power stations.

[0008] According to some embodiments of the trash grille assembly for a pumped-storage power station of the present application, the buffer member includes: a supporting body: the supporting body is connected to the guide portion, and a supporting surface perpendicular to the direction of the channel is formed on the supporting body; a buffer body: one end of the buffer body is supported on the supporting surface, and the other end of the buffer body is connected to the trash grille, and the buffer body is suitable for deformation in the extension direction of the channel.

[0009] According to some embodiments of the trash screen assembly for a pumped-storage power station of the present application, the buffer body includes: a guide rod: one end of the guide rod is connected to the support body and extends perpendicular to the support surface; a spring: the spring is sleeved on the guide rod.

[0010] According to the trash rack assembly for a pumped-storage power station in some embodiments of the present application, the support body and the buffer body are configured in a one-to-one correspondence and are arranged at intervals on the periphery of the trash rack.

[0011] According to some embodiments of the present application, the trash rack assembly for a pumped-storage power station further includes: a cleaning piece: the cleaning piece is movably disposed on the trash rack and / or the guide portion, and the cleaning piece moves relative to the surface of the trash rack to scrape off debris on the surface of the trash rack.

[0012] According to the trash screen assembly for a pumped-storage power station in some embodiments of the present application, the cleaning member translates or swings in a plane perpendicular to the channel.

[0013] According to some embodiments of the trash screen assembly for a pumped-storage power station of the present application, the cleaning member includes: a frame: the frame is sleeved on the edge of the trash screen, and a guide member is formed on the frame; a scraper, the scraper is movably arranged on the frame and is provided with a mating portion suitable for mating with the guide member to limit the moving trajectory of the scraper.

[0014] According to some embodiments of the present application, the trash screen assembly for a pumped storage power station further includes: a driving member, which is connected to the scraper to drive the scraper to move.

[0015] According to the trash screen assembly for a pumped-storage power station in some embodiments of the present application, the driving member is constructed as a cylinder, and the output end of the cylinder is connected to the scraper.

[0016] According to some embodiments of the present application, the trash screen assembly for a pumped storage power station further includes: an adsorption portion, which is arranged on the guide portion and has a groove for accommodating adsorption material.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural explosion diagram of a trash screen assembly for a pumped storage power station according to an embodiment of the present application;

[0020] Figure 2 is a three-dimensional structural diagram of a trash screen assembly for a pumped storage power station according to an embodiment of the present application;

[0021] Figure 3 is a structural side view of a trash screen assembly for a pumped storage power station according to an embodiment of the present application;

[0022] Figure 4 yes Figure 1 A partial enlarged view of area A.

[0023] Reference numerals:

[0024] 100. Trash screen assembly;

[0025] 1. flow guide; 11. shell;

[0026] 2. Trash rack; 21. Guide ramp;

[0027] 3. Buffer; 31. Guide rod; 32. Spring;

[0028] 4. Cleaning member; 41. Frame; 411. Cylinder; 412. Guide member; 42. Scraper;

[0029] 5. adsorption part; 51. first bracket; 52. second bracket; 53. adsorption rack;

[0030] 6. Guide plate. DETAILED DESCRIPTION

[0031] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0032] Reference below Figure 1-Figure 4 A trash screen assembly 100 for a pumped-storage power station according to an embodiment of the present application is described. The trash screen assembly 100 for a pumped-storage power station includes a guide portion 1, a trash rack 2 and a buffer member 3. A channel suitable for fluid circulation is formed in the guide portion 1. The trash rack 2 covers at least a portion of the entrance of the channel. A plurality of through holes are formed on the trash rack 2 to block debris from entering the channel. The buffer member 3 is connected between the guide portion 1 and the trash rack 2. The buffer member 3 can be deformed along the extension direction of the channel to adjust the relative position between the trash rack 2 and the guide portion 1.

[0033] At present, most of the existing trash grille assemblies are trash grilles that directly cover the channel entrance. This structural form only has the guide part and the trash grille at the channel entrance as the load-bearing structure. The load-bearing capacity of the trash grille frame structure design is insufficient, resulting in the overall rigidity not meeting the use requirements. When the trash grille assembly is subjected to the pressure generated by fluid impact, large debris impact, or debris accumulation and fluid impact, it is easy to deform, and it is difficult to meet the needs of long-term use.

[0034] like Figure 1 As shown, specifically, the trash rack assembly 100 includes a guide portion 1, a trash rack 2 and a buffer member 3. A channel suitable for fluid flow can be formed inside the guide portion 1, which can guide the fluid to smoothly enter the power plant, and the trash rack 2 can cover at least a portion of the channel entrance. A plurality of through holes are formed on the trash rack 2, and the arrangement of the through holes allows the fluid to pass through. The trash rack 2 covers at least a portion of the channel entrance, which can block debris from entering the channel, such as branches, plastics, etc., so that the fluid can pass through the channel more smoothly.

[0035] Furthermore, the buffer 3 can be connected between the guide part 1 and the trash rack 2. The buffer 3 can be deformed along the extension direction of the channel to adjust the relative position between the trash rack 2 and the guide part 1. When the trash rack 2 is impacted, a large impact force is generated. Since the buffer 3 can be deformed along the extension direction of the channel, the buffer 3 absorbs and disperses the impact force by deformation during the deformation stage, thereby reducing the impact force transmitted to the trash rack 2, avoiding the impact force from directly acting on the trash rack 2, causing deformation and damage to the trash rack 2, and making the trash rack more stable when facing the impact of high-speed fluid or debris, thereby extending the service life of the component.

[0036] In short, by providing the buffer member 3, the buffer member 3 is deformed in the extension direction of the channel and is used to adjust the relative position between the trash rack 2 and the guide portion 1, so that when the trash rack 2 is impacted, the buffer member 3 can help the trash rack 2 component to disperse part of the impact force, so that the trash rack is more stable when facing the impact of high-speed fluid or debris, reducing the risk of damage or deformation caused by impact, thereby extending the service life of the component.

[0037] like Figure 1 As shown, in some embodiments of the present application, the buffer member 3 includes a supporting body and a buffer body. The supporting body can be connected to the guide portion 1. A supporting surface perpendicular to the channel direction can be formed on the supporting body. One end of the buffer body can be supported on the supporting surface, and the other end of the buffer body can be connected to the trash rack 2. The buffer body is suitable for deformation in the extension direction of the channel.

[0038] It can be understood that when the fluid carrying debris impacts the trash rack 2, the impact force first acts on the trash rack 2. Since the buffer body is connected to the trash rack 2, the impact force is quickly transmitted to the buffer body. After receiving the impact force, the buffer body will deform along the extension direction of the channel. The deformation process of the buffer body is to absorb and disperse the impact force on the buffer body to prevent the trash rack 2 from being damaged by the force. The support surface provides a stable support foundation for the entire buffer member 3. Since the support surface is perpendicular to the channel direction, it ensures that the buffer body can be deformed along the extension direction of the channel, avoiding lateral deviation or distortion of the buffer body caused by the inclination of the support surface, thereby further improving the buffering effect and improving the effectiveness and controllability of the deformation.

[0039] like Figure 1 and Figure 4 As shown, in some embodiments of the present application, the buffer body includes a guide rod 31 and a spring 32 , one end of the guide rod 31 is connected to the support body and extends perpendicular to the support surface, and the spring 32 is sleeved on the guide rod 31 .

[0040] The spring 32 is sleeved on the guide rod 31, which means that the deformation of the spring 32 will be guided and constrained by the guide rod 31. As an elastic element, the spring 32 has excellent buffering and shock absorbing properties. When impacted, the spring 32 can undergo elastic deformation, thereby absorbing and dispersing the impact force. When the spring 32 is deformed in the extension direction of the channel, since the spring 32 is sleeved on the guide rod 31, the impact force first acts on the spring 32, causing the spring 32 to undergo elastic deformation. During the deformation process of the spring 32, part of the impact force is stored inside the spring 32, and through the elastic characteristics of the spring 32, the impact force stored inside the spring 32 is converted into a force to return the trash rack 2 to its initial position, which can reduce the force on the trash rack 2 and restore the trash rack 2 to its initial working position after the impact force disappears, ensuring that the trash rack 2 can continue to effectively intercept debris in the fluid. When the spring 32 is deformed by an impact force, the guide rod 31 guides the spring 32 to move along a predetermined path, thereby preventing the spring 32 from deflecting and twisting, and ensuring the stability and directionality of the spring 32 during the deformation process.

[0041] like Figure 1 As shown, in some embodiments of the present application, the supporting bodies and the buffering bodies are constructed in a one-to-one correspondence and are arranged at intervals on the outer periphery of the trash rack 2 .

[0042] Each supporting body corresponds to a buffer body, forming a plurality of independent buffer units, which can be dispersed and absorbed at multiple points, rather than concentrated at a certain point or a certain area. Multiple buffer units are arranged at intervals on the periphery of the trash rack 2, forming a surrounding protective barrier. This layout of buffer units ensures that the plane formed by the trash rack 2 can be effectively buffered and protected after being impacted at different angles and positions, and prevents excessive concentration of impact force in a certain direction or position. When the fluid impacts the trash rack 2, the impact force is no longer applied to a single point or a certain area, but is dispersed and borne by multiple buffer units, reducing the bearing capacity of each buffer unit, thereby reducing the risk of damage to the buffer unit due to impact. Each buffer unit can independently exert its elastic buffering effect, thereby improving the buffering effect and shock absorption performance of the entire component.

[0043] like Figure 1 and Figure 4 As shown, in some embodiments of the present application, the trash rack assembly 100 further includes a cleaning member 4, which is movably disposed on the trash rack 2, and moves relative to the surface of the trash rack 2 to scrape off debris on the surface of the trash rack 2; or the cleaning member 4 is movably disposed on the guide portion 1; or the cleaning member 4 can be disposed on both the trash rack 2 and the guide portion 1.

[0044] The cleaning member 4 can be arranged on the trash rack 2 to directly scrape off the debris on the surface of the trash rack 2. The cleaning member 4 can also be arranged on the guide part 1 to indirectly clean the trash rack 2 by guiding the fluid or mechanically driving. Alternatively, the cleaning member 4 can be arranged on both the trash rack 2 and the guide part 1 to achieve a more comprehensive cleaning effect on the trash rack 2. The movable arrangement of the cleaning member 4 enables it to move continuously along the surface of the trash rack 2 or the guide part 1, thereby improving the cleaning efficiency of the trash rack 2. The cleaning member 4 can directly act on the debris on the surface of the trash rack 2 by scraping. Regular cleaning can prevent the debris from accumulating on the trash rack 2 for a long time, thereby reducing the load on the trash rack 2 and reducing wear. A clean surface of the trash rack 2 reduces fluid resistance and mechanical stress, which helps to extend the overall life of the equipment.

[0045] In some embodiments of the present application, the cleaning member 4 is disposed on the trash rack 2 . The cleaning member 4 may be disposed at the front end of the trash rack 2 to clean the front end surface of the trash rack 2 .

[0046] In some other embodiments of the present application, the cleaning member 4 may be disposed at the rear end of the trash rack 2 to clean the rear end surface of the trash rack 2 .

[0047] In some further embodiments of the present application, the cleaning member 4 may be disposed at the front end and the rear end of the trash rack 2 to clean the front end surface and the rear end surface of the trash rack 2 .

[0048] like Figure 1 and Figure 4 As shown, in some embodiments of the present application, the cleaning member 4 translates or swings in a plane perpendicular to the channel.

[0049] The movement direction of the cleaning member 4 is perpendicular to the fluid channel, which means that the cleaning member 4 can directly act on the cross section of the trash rack 2, perpendicular to the fluid direction. The translational motion allows the cleaning member 4 to move back and forth on a fixed path, while the swinging motion allows the cleaning member 4 to swing back and forth within a certain angle range. Compared with simple flushing by natural fluid, this physical cleaning method is more efficient and can quickly remove debris adhering to the trash rack 2.

[0050] like Figure 1 and Figure 4 As shown, in some embodiments of the present application, the cleaning member 4 includes: a frame 41 and a scraper 42. The frame 41 can be arranged at the edge of the trash rack 2. A guide member 412 is formed on the frame 41. The scraper 42 is movably arranged on the frame 41 and is provided with a matching portion suitable for matching with the guide member 412 to limit the moving trajectory of the scraper 42.

[0051] The frame 41 is sleeved on the edge of the trash rack 2. The frame 41 serves as a supporting structure for the movement of the scraper 42 and provides a stable movement platform for the scraper 42. A guide 412 is formed on the frame 41. The guide 412 provides a clear trajectory and direction for the movement of the scraper 42. The guide 412 can be constructed in the form of a slide rail, a guide groove or other forms of guiding structures to ensure that the scraper 42 can move along a predetermined path. The scraper 42 is provided with a matching portion suitable for matching with the guide 412. The matching portion can be constructed in the form of a slider, a roller, a pin, etc. to achieve precise docking and smooth movement with the guide 412. The precise matching of the guide 412 and the matching portion ensures that the scraper 42 can move along a predetermined trajectory, thereby avoiding deviation or shaking of the scraper 42 during the cleaning process.

[0052] like Figure 1 and Figure 4 As shown, in some embodiments of the present application, the trash screen assembly 100 further includes a driving member, which is connected to the scraper 42 to drive the scraper 42 to move.

[0053] The driving member is the direct power source for the movement of the scraper 42. The driving member can be connected to the scraper 42 through a structural form such as mechanical connection or electromagnetic drive. The driving member generates a corresponding driving force according to a control signal or a preset program to push the scraper 42 to move on the surface of the trash rack 2. This driving mode can be continuous, intermittent or adjusted according to actual needs to meet the cleaning needs under different working conditions; after the introduction of the driving member, the movement of the scraper 42 no longer depends on uncontrollable factors such as manual operation or external fluid, but is automatically controlled by the driving member according to a preset program, which greatly improves the efficiency and accuracy of cleaning and reduces the labor intensity of manual intervention.

[0054] like Figure 4 As shown, in some embodiments of the present application, the driving member is constructed as a cylinder 411 , and the output end of the cylinder 411 is connected to the scraper 42 .

[0055] The cylinder 411 is a device that uses gas pressure or vacuum to generate linear motion. It is usually composed of a cylinder body, a piston, a seal, and a connector. In some embodiments of the present application, the cylinder 411 is used as a power source for the movement of the scraper 42, and a thrust or a pull is generated by the piston movement inside it, thereby driving the scraper 42 to move on the surface of the trash rack 2. The output end of the cylinder 411 is usually a piston rod, which is directly connected to the scraper 42. This direct connection ensures that the power generated by the cylinder 411 can be efficiently transmitted to the scraper 42. The connection between the output end and the scraper 42 can be a threaded connection, a pin connection, or other forms of mechanical connection to ensure the stability and reliability of the connection. The structure of the cylinder 411 is relatively simple and easy to install and maintain. The cylinder 411 has high reliability and durability, and the simple structural design reduces the failure rate and maintenance cost of the trash rack assembly 100, and improves its overall performance and reliability.

[0056] like Figure 1 As shown, in some embodiments of the present application, the trash grill assembly 100 may further include an adsorption portion 5, which is disposed on the flow guide portion 1, and is provided with a groove for accommodating adsorption materials.

[0057] The guide part 1 is the part of the trash screen used to guide the passage of fluid. The adsorption part 5 is arranged on the guide part 1. The adsorption part 5 is also provided with a groove for accommodating the adsorption material, which means that the adsorption part 5 can directly contact the suspended matter, oil and other impurities in the water when the fluid passes through. The introduction of the adsorption part 5 enables the trash screen to further have the ability to adsorb tiny particles and soluble impurities on the basis of intercepting large pieces of debris. The adsorption material can fully contact and adsorb harmful substances in the water, thereby improving the water purification effect, and also reducing the probability of subsequent components being damaged by water quality. The groove design of the adsorption part 5 makes the replacement and replenishment of the adsorption material simple and quick. When the adsorption material reaches a saturated state, the saturated adsorption material can be taken out and replaced with a new material. At the same time, different types of adsorption materials can be flexibly selected according to different requirements for treating water quality to meet different purification requirements.

[0058] like Figure 1 As shown, in some embodiments of the present application, the trash grill assembly 100 further includes a guide plate 6, on which a plurality of spiral blades are formed and which is rotatably disposed in the channel or at the outlet of the channel.

[0059] The guide plate 6 can be arranged in the channel or at the outlet of the channel. A plurality of spiral blades are formed on the guide plate 6. These blades can be arranged in a spiral along the length direction of the guide plate 6. The design of the spiral blades increases the contact area between the guide plate 6 and the fluid. The main function of the guide plate 6 is to guide the flow direction and speed of the fluid. The guide plate 6 can be capable of rotation. When the fluid passes through the guide plate 6, the rotation of the spiral blades will produce a strong disturbance effect. The rotation of the spiral blades can guide the fluid to form a more uniform and orderly distribution in the channel or at the outlet. By adjusting the angle and rotation speed of the spiral blades, the fluid speed can be controlled in different situations, reducing the impact of the fluid impact on the subsequent structure and improving the service life of the equipment.

[0060] It should be noted that if Figure 1-Figure 3 As shown, in some embodiments of the present application, a trash rack 2, a cleaning member 4, a buffer member 3, an adsorption portion 5 and a guide plate 6 are arranged in sequence from the entrance to the exit of the channel, wherein the adsorption portion 5 also includes a first bracket 51, a second bracket 52 and an adsorption frame 53, a first bracket 51 and a plurality of second brackets 52 are arranged on the inner wall of the guide portion 1, the first bracket 51 is suitable for providing support for the guide plate 6 behind, a plurality of second brackets 52 are arranged at intervals in the guide portion 1 along the extension direction of the channel, a plurality of second brackets 52 can serve as a supporting body, and the top surfaces of the plurality of second brackets 52 are in the same plane to form a supporting surface for supporting the buffer body, the adsorption frame 53 is respectively sleeved on the first bracket 51 and the plurality of second brackets 52, the adsorption frame 53 is structured in a tree shape, and the adsorption frame 53, the first bracket 51 and the second bracket 52 can be provided with grooves for accommodating adsorption materials individually, in whole or in part.

[0061] By using the second bracket 52 to replace the supporting body as the supporting structure of the buffer body, the second bracket 52 is not only used to support the adsorption frame 53, but also directly undertakes part of the supporting function of the buffer body, which reduces the weight of the overall structure and reduces unnecessary components, thereby simplifying the structure. The second brackets 52 are arranged at intervals along the extension direction of the channel to form a stable support network, thereby enhancing the overall stability of the system. The tree-like structure of the adsorption frame 53 increases the contact area between the adsorption frame 53 and the fluid, and the adsorption material can be distributed over a larger area, thereby improving the adsorption efficiency.

[0062] like Figure 1 and Figure 2As shown, in some embodiments of the present application, guide bevels 21 are symmetrically arranged around the trash rack 2, and the inclined surface of the guide bevel 21 is close to one side of the channel. The inclined surface design enables the fluid to produce a diversion and guiding effect when it contacts. The fluid will flow along the inclined surface, thereby changing its original flow direction and speed, which helps to improve the distribution of the fluid in the channel. They can guide the fluid to pass through the trash rack 2 area more evenly and reduce eddy currents and turbulence.

[0063] Specifically, when in use, the fluid first enters the channel, and when passing through the channel, the fluid encounters the trash rack 2 arranged at the entrance of the channel. Through the formation of a plurality of through holes on the trash rack 2, large particles of debris in the water are initially intercepted on the trash rack 2. When there are debris on the trash rack 2, the cylinder 411 is used to drive the guide 412 on the frame 41 and drive the scraper 42 to translate or swing on the plane of the trash rack 2, so as to realize the cleaning of the trash rack 2 by the scraper 42, and avoid the accumulation of debris on the trash rack 2 to cause blockage. If the trash rack 2 is symmetrically provided with guide inclined blocks 21 around, the inclined surfaces of these inclined blocks will guide the fluid to pass through the trash rack 2 at a more appropriate angle and speed, which is helpful to guide the fluid to pass through the trash rack 2 area more evenly, reduce eddy currents and turbulence phenomena, and when the fluid enters the process of entering, the trash rack 2 is impacted by squeezing the spring 32 to reduce the impact of the fluid on the assembly, thereby improving the impact resistance of the trash rack 2 and extending the service life of the trash rack 2. After being buffered by the spring 32, the fluid enters the adsorption part 5. A tree-like adsorption frame 53 is provided here, on which adsorption materials such as activated carbon, filter material, etc. are distributed. The adsorption material can efficiently adsorb impurities such as tiny particles and dissolved organic matter in the fluid, further improve the water quality under different working conditions, and reduce the siltation of reservoirs without natural runoff. The fluid treated by the adsorption part 5 continues to flow to the subsequent treatment link under the guidance of the guide plate 6.

[0064] like Figure 1 and Figure 2 As shown, in some embodiments of the present application, the flow guide portion 1 further includes a shell 11, and the shell 11 is used to protect the fluid in the channel from being disturbed by the fluid outside the channel.

[0065] It should be noted that the flow direction of the fluid can be forward or reverse, wherein the forward direction means that the fluid first impacts the front end of the trash rack 2, and then flows through the buffer 3 and the guide part 1, and the reverse direction means that the flow path flows from the guide part 1 through the buffer 3 and then impacts the rear end of the trash rack 2.

[0066] In some embodiments of the present application, a diversion tunnel or a tailwater tunnel is provided in the pumped-storage power station. The diversion tunnel or the tailwater tunnel and the outer peripheral wall thereon can serve as a guide part and a shell, so that the fluid in the diversion tunnel or the tailwater tunnel is protected from interference by the fluid outside the channel.

[0067] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0068] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A trash screen assembly for a pumped storage power station, characterized in that: include: A flow guide portion (1), wherein a channel suitable for fluid circulation is formed in the flow guide portion (1); a trash rack (2), the trash rack (2) covering at least a portion of the entrance of the passage, and a plurality of through holes formed on the trash rack (2) so as to block debris from entering the passage; A buffer member (3) is connected between the guide portion (1) and the trash rack (2), and the buffer member (3) can be deformed along the extension direction of the channel to adjust the relative position between the trash rack (2) and the guide portion (1).

2. The trash screen assembly for a pumped storage power station according to claim 1, characterized in that: The buffer member (3) comprises: Support body: the support body is connected to the guide portion (1), and a support surface perpendicular to the channel direction is formed on the support body; Buffer body: one end of the buffer body is supported on the support surface, the other end of the buffer body is connected to the trash rack (2), and the buffer body is suitable for deformation in the extension direction of the channel.

3. The trash screen assembly for a pumped storage power station according to claim 2, characterized in that: The buffer body comprises: Guide rod (31): one end of the guide rod (31) is connected to the support body and extends perpendicularly to the support surface; Spring (32): The spring (32) is sleeved on the guide rod (31).

4. The trash screen assembly for a pumped storage power station according to claim 3, characterized in that: The supporting bodies and the buffering bodies are structured in a one-to-one correspondence and are arranged at intervals on the outer periphery of the trash rack (2).

5. The trash screen assembly for a pumped storage power station according to claim 1, characterized in that: Also includes: Cleaning member (4): the cleaning member (4) is movably arranged on the trash rack (2) and / or the guide portion (1); the cleaning member (4) moves relative to the surface of the trash rack (2) to scrape off debris on the surface of the trash rack (2).

6. The trash screen assembly for a pumped storage power station according to claim 5, characterized in that: The cleaning element (4) translates or swings in a plane perpendicular to the channel.

7. The trash screen assembly for a pumped storage power station according to claim 6, characterized in that: The cleaning member (4) comprises: Frame (41): the frame (41) is sleeved on the edge of the trash rack (2), and a guide member (412) is formed on the frame (41); A scraper (42) is movably arranged on the frame (41) and is provided with a matching portion suitable for matching with the guide member (412) to limit the moving track of the scraper (42).

8. The trash screen assembly for a pumped storage power station according to claim 7, characterized in that: Also includes: A driving member is connected to the scraper (42) to drive the scraper (42) to move.

9. The trash screen assembly for a pumped storage power station according to claim 8, characterized in that: The driving member is constructed as a cylinder (411), and an output end of the cylinder (411) is connected to the scraper (42).

10. The trash screen assembly for a pumped storage power station according to claim 1, characterized in that: It also comprises an adsorption portion (5), wherein the adsorption portion (5) is arranged on the flow guide portion (1), and the adsorption portion (5) is provided with a groove for accommodating adsorption material.

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