Trash rack of pumped storage hydropower station

Abstract

The utility model provides a trash rack for a pumped storage hydropower station, which comprises an annular grid for intercepting sundries at a water inlet of a water turbine; the base is provided with a communicating channel and a trash blocking plate, one end of the communicating channel is a water inlet, the other end of the communicating channel is a water outlet, the annular grid is arranged at the water inlet of the communicating channel, and the water inlet and the water outlet are located on the two sides of the trash blocking plate respectively; the lifting assembly is installed on the trash blocking plate and used for controlling the annular grid to rise to the position above the water surface and controlling the annular grid to reset; the cleaning assembly comprises a high-pressure water spraying mechanism, and the high-pressure water spraying mechanism is connected with the trash blocking plate so as to spray high-pressure water flow to the annular grid located above the water surface to clean the annular grid; in the cleaning process of the trash rack, manual auxiliary cleaning is not needed, the automation degree is high, the cleaning efficiency is high, and the cleaning effect is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pollution cleaning equipment, and particularly relates to a pollution barrier for pumped storage power station. BACKGROUND

[0002] Many branches, leaves, garbage bags and other pollutants often float in the power station reservoir, so a pollution barrier is arranged at the water inlet of the water turbine to block the pollutants from entering the water turbine, so as to prevent water head loss and equipment damage. In the process of use, many impurities are adhered in the gap of the pollution barrier, which affects the use of the pollution barrier, so the pollution barrier needs to be cleaned. The existing cleaning method mainly uses mechanical cleaning, but mechanical cleaning needs manual operation close to the pollution barrier, which is time-consuming and laborious. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application aims to provide a pollution barrier for pumped storage power station to solve the problems of time-consuming and laborious cleaning and low efficiency of the current pollution barrier.

[0004] To achieve the above purpose, the present application provides a pollution barrier for pumped storage power station, which comprises:

[0005] a ring-shaped barrier for intercepting impurities at the water inlet of the water turbine;

[0006] a base provided with a communication channel and a pollution barrier plate, one end of the communication channel being a water inlet and the other end being a water outlet, the ring-shaped barrier being arranged at the water inlet of the communication channel, and the water inlet and the water outlet being respectively located on two sides of the pollution barrier plate;

[0007] a lifting assembly installed on the pollution barrier plate and used for controlling the ring-shaped barrier to rise above the water surface and reset;

[0008] a cleaning assembly comprising a high-pressure water spraying mechanism connected with the pollution barrier plate and used for spraying high-pressure water flow to the ring-shaped barrier above the water surface to clean the ring-shaped barrier.

[0009] Optionally, the lifting assembly comprises a telescopic cylinder, a lifting plate and a lifting shaft, the telescopic cylinder is fixedly connected with the pollution barrier plate, the lifting plate is fixedly connected with the output shaft of the telescopic cylinder, the lifting plate is connected with the top of the lifting shaft, and the bottom of the lifting shaft is connected with the ring-shaped barrier, so as to control the lifting of the ring-shaped barrier.

[0010] Optionally, the high-pressure water spraying mechanism comprises a high-pressure pump, an inlet pipe and an outlet pipe connected in series, the high-pressure pump is fixedly connected to the trash plate, the outlet pipe is connected to the lifting plate and a part of the outlet pipe is vertically arranged along the lifting shaft, the outlet pipe vertically arranged along the lifting shaft is a spraying section, a plurality of water spraying holes are arranged along the spraying section, and the water spraying holes are opposite to the annular grid.

[0011] Optionally, the water spraying holes are arranged in a row along the length direction of the spraying section, the cleaning assembly further comprises a rotating mechanism for controlling the rotation of the annular grid around the spraying section, the rotating mechanism comprises a rotating motor, a first gear and a second gear, the rotating motor is fixedly installed on the lifting plate, the first gear is fixedly connected to the output shaft of the rotating motor, the second gear is fixedly connected to the top of the lifting shaft, and the first gear is engaged with the second gear, wherein the diameter of the first gear is smaller than the diameter of the second gear.

[0012] Optionally, the bottom of the annular grid is provided with a hollow bottom plate, and the lifting shaft is connected to the center of the hollow bottom plate to drive the annular grid to lift and rotate.

[0013] Optionally, the hollow bottom plate is connected with a pollution isolation cylinder, when the annular grid is above the water surface, the bottom of the pollution isolation cylinder is still in the communication channel to prevent impurities from entering the communication channel.

[0014] Optionally, the annular pool is further provided, the annular pool is fixedly installed on the trash plate, the annular pool is provided with a front baffle, when the high-pressure water spraying mechanism cleans the annular grid, the annular grid penetrates the annular pool, the high-pressure water spraying mechanism sprays water towards the front baffle, so that the impurities on the annular grid fall into the annular pool through the blocking action of the front baffle.

[0015] Optionally, the bottom of the annular grid is provided with a radiation grid, the radiation grid extends outward from the bottom of the annular grid to collect the impurities falling from the annular grid.

[0016] Optionally, the annular inner side wall of the annular pool is lower than the annular outer side wall, when the high-pressure water spraying mechanism cleans the annular grid, the end of the radiation grid away from the annular grid is higher than the inner side wall of the annular pool and lower than the outer side wall of the annular pool.

[0017] Optionally, the radiation grid extends obliquely upward in the direction away from the annular grid.

[0018] From the above, it can be seen that the application provides a trash screen of pumped storage power station, which comprises a base, an annular screen, a lifting assembly and a cleaning assembly. The base is used to install the trash screen, the annular screen, the lifting assembly and the cleaning assembly. The base is further provided with a communication channel for guiding water flow. The annular screen is arranged at the water inlet of the communication channel for intercepting sundries to avoid the sundries entering the water turbine through the communication channel. The trash screen is arranged on the base to separate the water inlet and the water outlet of the communication channel to avoid sundries entering the water turbine inlet from above the base. The lifting assembly can control the annular screen to rise above the water surface so that the high-pressure water jet mechanism sprays high-pressure water flow on the annular screen to impact and remove the sundries adhered to the annular screen, so as to restore the annular screen to a clean state. The above cleaning process of the annular screen does not require manual cleaning, has high automation degree, high cleaning efficiency and good cleaning effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the application or related art, the drawings needed to be used in the embodiments or related art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 The structure schematic diagram of the base is shown for the embodiments of the application.

[0021] Figure 2 The structure schematic diagram of the rotating mechanism is shown for the embodiments of the application.

[0022] Figure 3 The cross-sectional schematic diagram of the communication channel is shown for the embodiments of the application.

[0023] The drawings are as follows: 1, annular screen; 11, hollow bottom plate; 12, trash screen cylinder; 2, base; 21, communication channel; 211, water inlet; 212, water outlet; 22, trash screen; 3, lifting assembly; 31, telescopic cylinder; 32, lifting plate; 33, lifting shaft; 4, cleaning assembly; 41, high-pressure water jet mechanism; 411, high-pressure pump; 412, water inlet pipe; 413, water outlet pipe; 4131, water jet hole; 42, rotating mechanism; 421, rotating motor; 422, first gear; 423, second gear; 5, annular pool; 51, annular inner side wall; 52, annular outer side wall; 6, front baffle; 7, radial screen; 61, sewage pipe. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the application more clear, the application will be further described in detail below in combination with specific embodiments and with reference to the drawings.

[0025] For ease of description, unless otherwise defined, technical terms or scientific terms used in the embodiments of the present application shall have the ordinary meaning understood by one of ordinary skill in the art to which the present application pertains. The terms "first", "second", and similar terms used in the embodiments of the present application do not denote any order, quantity, or importance, but are used to distinguish different components. The terms "include", "contain", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and similar terms do not mean only physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships can also change accordingly.

[0026] Based on the background, various pollutants such as branches, leaves, and garbage bags often float in the reservoir of a power station. If these pollutants enter the water turbine, it will cause head loss and equipment damage. Therefore, it is an important measure to ensure the normal operation of the power station to set a trash screen at the water inlet of the water turbine to block the pollutants from entering. However, during use, a large amount of impurities will adhere to the gaps of the trash screen, affecting the blocking effect and service life.

[0027] Currently, the main method for cleaning the trash screen is mechanical cleaning. Although mechanical cleaning can remove pollutants to some extent, its limitations are also obvious. First, mechanical cleaning has limited efficiency, and it is difficult to completely remove small impurities that are tightly adhered to the gaps of the trash screen. Second, mechanical cleaning requires manual assistance, increasing the complexity and cost of cleaning work. In addition, mechanical cleaning equipment may wear out or malfunction during long-term use, requiring regular maintenance and replacement of parts.

[0028] To solve the above problems, the present application provides a trash screen for a pumped storage power station.

[0029] The embodiments of the present application will be described in detail below with reference to the accompanying drawings. Figures 1-3 The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0030] As shown in Figure 1 , Figure 2 and Figure 3 , the present application provides a trash screen for a pumped storage power station, comprising:

[0031] a ring-shaped screen 1 for intercepting impurities at the water inlet of the water turbine;

[0032] The base 2 is provided with a communication channel 21 and a trash screen 22, one end of the communication channel 21 is a water inlet 211, the other end is a water outlet 212, the ring-shaped grate 1 is arranged at the water inlet 211 of the communication channel 21, and the water inlet 211 and the water outlet 212 are respectively located on the two sides of the trash screen 22;

[0033] The lifting assembly 3 is installed on the trash screen 22 and is used to control the ring-shaped grate 1 to rise above the water surface and reset the ring-shaped grate 1.

[0034] The cleaning assembly 4 includes a high-pressure water jet mechanism 41 connected with the trash screen 22 to spray high-pressure water flow to the ring-shaped grate 1 above the water surface to clean the ring-shaped grate 1.

[0035] Specifically, the base 2 is arranged in the channel at the water inlet of the water turbine, and the two ends are connected to the opposite two side walls of the channel. The base 2 is provided with a communication channel 21 for guiding water flow. The upper surface of the base 2 is provided with a trash screen 22, and the two ends are also connected to the opposite two side walls of the channel. The water inlet 211 of the communication channel 21 is located on the side of the trash screen 22 away from the water turbine, and the water outlet 212 is located on the side of the trash screen 22 close to the water turbine. The trash screen 22 can intercept debris to prevent debris from entering the water inlet of the water turbine from above the base 2. The ring-shaped grate 1 is arranged at the water inlet 211 of the communication channel 21 as a trash screen to prevent debris from entering the water turbine through the communication channel 21.

[0036] In this embodiment, the base 2 is used to install the trash screen 22, the ring-shaped grate 1, the lifting assembly 3 and the cleaning assembly 4. The base 2 is also provided with a communication channel 21 for guiding water flow. The ring-shaped grate 1 is arranged at the water inlet 211 of the communication channel 21 to intercept debris and prevent debris from entering the water turbine through the communication channel 21. The trash screen 22 is arranged on the base 2 to separate the water inlet 211 and the water outlet 212 of the communication channel 21 to prevent impurities from entering the water inlet of the water turbine from above the base 2. The lifting assembly 3 can control the ring-shaped grate 1 to rise above the water surface so that the high-pressure water jet mechanism 41 can spray high-pressure water flow to the ring-shaped grate 1 to impact and remove the impurities adhered to the ring-shaped grate 1, so that the ring-shaped grate 1 can restore a clean state. The above process of cleaning the ring-shaped grate 1 does not require manual cleaning, has high automation, high cleaning efficiency and good cleaning effect.

[0037] In some embodiments, as Figure 1 , Figure 2 and Figure 3As shown, the lifting assembly 3 comprises a telescopic cylinder 31, a lifting plate 32 and a lifting shaft 33, the telescopic cylinder 31 is fixedly connected with the trash plate 22, the lifting plate 32 is fixedly connected with the output shaft of the telescopic cylinder 31, the lifting plate 32 is connected with the top of the lifting shaft 33, and the bottom of the lifting shaft 33 is connected with the ring-shaped grate 1 to control the lifting of the ring-shaped grate 1.

[0038] In addition, the bottom of the ring-shaped grate 1 is provided with a hollow bottom plate 11, and the lifting shaft 33 is connected at the center position of the hollow bottom plate 11 to drive the lifting of the ring-shaped grate 1.

[0039] Specifically, the ring-shaped grate 1 is arranged protruding from the base 2, and the hollow bottom plate 11 blocks the water inlet 211 of the communication channel 21 to prevent impurities from entering the communication channel 21. The telescopic cylinder 31 is fixedly installed on the trash plate 22, the lifting plate 32 is fixedly installed on the output shaft of the telescopic cylinder 31, the lifting plate 32 is located above the trash grate and is arranged in parallel with the base 2, the lifting shaft 33 is arranged at one end of the lifting plate 32 away from the telescopic cylinder 31, the lifting shaft 33 penetrates the ring-shaped grate 1 and is fixedly connected at the center of the hollow bottom plate 11, and the lifting assembly 3 drives the lifting of the lifting shaft 33, thereby driving the lifting of the hollow bottom plate 11 and the ring-shaped grate 1.

[0040] In this embodiment, the telescopic cylinder 31 serves as a power source, and through the telescopic movement of the output shaft thereof, the lifting of the lifting plate 32, the lifting shaft 33, the hollow bottom plate 11 and the ring-shaped grate 1 can be accurately controlled, so that the ring-shaped grate 1 can be accurately lifted above the water surface according to different water depth conditions, so that the high-pressure water spraying mechanism 41 can perform cleaning work on the ring-shaped grate 1.

[0041] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 3 , the high-pressure water spraying mechanism 41 comprises a high-pressure pump 411, a water inlet pipe 412 and a water outlet pipe 413 connected with each other, the high-pressure pump 411 is fixedly connected with the trash plate 22, the water outlet pipe 413 is connected with the lifting plate 32 and part of the water outlet pipe 413 is vertically arranged along the lifting shaft 33, the water outlet pipe 413 vertically arranged along the lifting shaft 33 is a spraying section, a plurality of water spraying holes 4131 are arranged on the spraying section, and the water spraying holes 4131 are opposite to the ring-shaped grate 1.

[0042] Specifically, the high-pressure pump 411 is installed on the skimmer 22, the water inlet of the high-pressure pump 411 is connected with the water inlet pipe 412, and the water inlet pipe 412 extends into the water outlet 212 of the communication channel 21. Since the impurities in the water inlet 211 of the communication channel 21 are intercepted, the impurities in the water outlet 212 are less, the water inlet pipe 412 extends into the water outlet 212 of the communication channel 21, which reduces the possibility of impurities blocking the water outlet pipe 413 and ensures the normal operation of the high-pressure water spraying mechanism 41. The water outlet pipe 413 is connected with the water outlet of the high-pressure pump 411, the water outlet pipe 413 penetrates through the lifting plate 32 away from one end of the telescopic cylinder 31, and is fixedly connected with the lifting plate 32. The water outlet pipe 413 extends into the bottom of the ring fence 1, and the water outlet pipe 413 located in the ring fence 1 is a hard pipe. The hard pipe is vertically arranged along the lifting shaft 33, and the hard pipe is a spraying section. A plurality of water injection holes 4131 are arranged on the spraying section, and the water injection holes 4131 are used to spray high-pressure water flow to the ring fence 1.

[0043] In the embodiment, the water outlet pipe 413 is connected with the lifting plate 32, that is, the spraying section is connected with the lifting plate 32, so that the spraying section rises and falls with the lifting plate 32, thereby ensuring that the spraying section maintains a relatively stable positional relationship with the ring fence 1, so as to clean the ring fence 1. In addition, the spraying section is arranged in the ring fence 1, and the high-pressure water flow sprayed by the spraying section impacts the impurities on the ring fence 1 outward, thereby avoiding the impurities from falling on the hollow bottom plate 11 and affecting the water flow into the communication channel 21.

[0044] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 3 , the water injection holes 4131 are arranged in a row along the length direction of the spraying section. The cleaning assembly 4 further comprises a rotating mechanism 42 for controlling the rotation of the ring fence 1 around the spraying section. The rotating mechanism 42 comprises a rotating motor 421, a first gear 422 and a second gear 423. The rotating motor 421 is fixedly installed on the lifting plate 32. The first gear 422 is fixedly connected with the output shaft of the rotating motor 421. The second gear 423 is fixedly connected with the top of the lifting shaft 33. The first gear 422 is engaged with the second gear 423. The diameter of the first gear 422 is smaller than the diameter of the second gear 423.

[0045] Specifically, the lifting plate 32 is rotationally connected with the lifting shaft 33. The lifting plate 32 is provided with a mounting hole, and the lifting shaft 33 penetrates through the mounting hole. The lifting shaft 33 is provided with a protrusion, and the mounting hole is provided with an annular limiting groove on the hole wall. The protrusion slides in the annular limiting groove with the rotation of the lifting shaft 33, thereby limiting the lifting shaft 33 relative to the lifting plate 32, and improving the stability of the connection between the lifting shaft 33 and the lifting plate 32.

[0046] In the embodiment, the rotating motor 421 drives the ring-shaped grid 1 to rotate steadily through the first gear 422 and the second gear 423. The ring-shaped grid 1 can effectively throw away the impurities adhered thereto by the rotating action, and the high-pressure water spraying mechanism 41 can realize deep cleaning of the whole ring-shaped grid 1. In addition, since the diameter of the first gear 422 is smaller than that of the second gear 423, the rotating motor 421 can reduce the rotating speed of the lifting shaft 33 through the first gear 422 and the second gear 423, so as to ensure the stable rotation of the ring-shaped grid 1, avoid the ring-shaped grid 1 from rotating too fast to affect the stability of its own structure, and reduce its service life.

[0047] In some embodiments, as shown in Figure 3 , the hollow bottom plate 11 is connected with the dirt separation cylinder 12. When the ring-shaped grid 1 is above the water surface, the bottom of the dirt separation cylinder 12 is still in the communication channel 21, so as to prevent impurities from entering the communication channel 21.

[0048] Specifically, when the ring-shaped grid 1 is in the working condition of intercepting impurities, i.e., the ring-shaped grid 1 is in the working condition of being not cleaned, the dirt separation cylinder 12 is completely in the communication channel 21; when the ring-shaped grid 1 is in the working condition of not intercepting impurities, i.e., the ring-shaped grid 1 is in the working condition of being cleaned, most of the dirt separation cylinder 12 rises above the base 2 with the ring-shaped grid 1, and the bottom of the dirt separation cylinder 12 still blocks the water inlet 211 of the communication channel 21, so as to prevent impurities from entering the communication channel 21.

[0049] In the embodiment, the dirt separation cylinder 12 still blocks the water inlet 211 of the communication channel 21 when the ring-shaped grid 1 is in the working condition of being cleaned, so as to avoid impurities from entering the communication channel 21 in the working condition of the ring-shaped grid 1 being cleaned, thereby blocking the communication channel 21 and affecting the normal passing of water flow.

[0050] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 3 , the bottom of the ring-shaped grid 1 is provided with a radiation grid 7 extending outward from the bottom of the ring-shaped grid 1, so as to collect the impurities falling from the ring-shaped grid 1.

[0051] In addition, the radiation grid 7 extends obliquely upward away from the ring-shaped grid 1.

[0052] In the embodiment, the radiation grid 7 is uniformly arranged along the circumference of the ring-shaped grid 1 and extends upward, so as to collect the impurities from the ring-shaped grid 1 and facilitate the centralized cleaning of the impurities.

[0053] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 3As shown, the trash screen of the pumped storage power station further comprises an annular pool 5 fixedly installed on the trash plate 22, and a front baffle 6 is arranged on the annular pool 5. When the high-pressure water spraying mechanism 41 cleans the annular screen 1, the annular screen 1 penetrates the annular pool 5, and the high-pressure water spraying mechanism 41 sprays water towards the front baffle 6, so that the sundries on the annular screen 1 fall into the annular pool 5 under the blocking action of the front baffle 6.

[0054] Specifically, the annular pool 5 is installed on the top of the trash plate 22 and above the water surface. When the annular screen 1 is in the non-cleaning working condition, the annular pool 5 is located on the top of the annular screen 1. When the annular screen 1 is in the cleaning working condition, the annular screen 1 penetrates the annular pool 5, and the annular pool 5 is located on the bottom of the annular screen 1. The front baffle 6 is located on one side of the annular pool 5 and opposite to the spraying section. The high-pressure water spraying mechanism 41 sprays water towards the front baffle 6, so that the sundries impacted from the annular screen 1 fall into the annular pool 5 under the blocking action of the front baffle 6. The front baffle 6 is provided with a pollution discharge pipe 61, which concentrates and discharges the sundries collected from the annular pool 5, so as to save the space in the annular pool 5.

[0055] In the embodiment, the annular pool 5 provides a concentrated collection area for the sundries. After the sundries are washed down by the high-pressure water, the sundries fall into the annular pool 5 under the action of the front baffle 6, avoiding the sundries scattered in the water and adhered to the annular screen 1 again.

[0056] In some embodiments, the annular inner wall 51 of the annular pool 5 is lower than the annular outer wall 52. When the high-pressure water spraying mechanism 41 cleans the annular screen 1, the end of the radial screen 7 away from the annular screen 1 is higher than the inner wall of the annular pool 5 and lower than the outer wall of the annular pool 5.

[0057] In the embodiment, when the radial screen 7 rotates with the annular screen 1, the sundries on the radial screen 7 are thrown into the annular pool 5. The end of the radial screen 7 away from the annular screen 1 is higher than the inner wall of the annular pool 5 and lower than the outer wall of the annular pool 5, which can ensure that the sundries in the radial screen 7 fall into the annular pool 5, avoiding the sundries thrown into the surrounding water area.

[0058] In summary, the cleaning process of the trash screen of the pumped storage power station is as follows:

[0059] The telescopic cylinder 31 is started, the output shaft of the telescopic cylinder 31 drives the lifting plate 32, the lifting shaft 33 and the annular grid 1 to rise, the annular grid 1 penetrates the annular pool 5, until the end of the radial grid 7 away from the annular grid 1 is higher than the inner side wall of the annular pool 5, and at the same time is lower than the outer side wall of the annular pool 5, the telescopic cylinder 31 is closed, the rotating motor 421 is started, the annular grid 1 starts to rotate through the action of the rotating motor 421, at the same time the high-pressure pump 411 is opened, the high-pressure water flow is sprayed to the front baffle 6, the sundries impacted from the annular grid 1 are blocked by the front baffle 6 and fall into the annular pool 5, at the same time the sundries on the radial grid 7 are thrown into the annular pool 5, the sundries in the annular pool 5 are discharged and concentrated for treatment, after the annular grid 1 is cleaned, the rotating motor 421 and the high-pressure pump 411 are closed, the telescopic cylinder 31 is started again, the telescopic cylinder 31 drives the annular grid 1 to reset. The cleaning degree of the annular grid 1 is high, manual cleaning is not needed, the cleaning efficiency is high and the cleaning effect is good.

[0060] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to suggest that the scope of the application is limited to these examples; the above embodiments or technical features among different embodiments can also be combined, steps can be implemented in any order, and there are many other changes to the aspects of the embodiments of the application as described above, which are not provided in detail for the sake of brevity. It is intended that each of the foregoing examples is merely exemplary and that all such examples are to be construed as equivalent in scope.

[0061] In addition, in order to simplify the description and discussion, and so as not to make the embodiments of the application difficult to understand, the known power / ground connections of integrated circuit chips and other components can or can not be shown in the provided drawings. In addition, the devices can be shown in the form of block diagrams in order to avoid making the embodiments of the application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the application are to be implemented (i.e. these details should be entirely within the understanding of those skilled in the art). Where specific details (e.g. circuits) are set forth in order to describe an exemplary embodiment of the application, it will be apparent to those skilled in the art that the embodiments of the application can be practiced without these specific details or with variations to these specific details. Therefore, these descriptions should be considered as illustrative rather than limiting.

[0062] Although the application has been described in conjunction with the specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures can use the embodiments discussed.

[0063] Embodiments of the present application are intended to embrace all such alterations, modifications, and variations that fall within the scope of the broadest possible interpretation of the application as set forth in the claims. Accordingly, the application should not be limited to the specific embodiments described herein, but should be accorded the full scope that the law entails.

Claims

1. A trash rack for a pumped storage hydroelectric power plant, characterized in that, The utility model relates to a water turbine inlet cleaning device, including: A ring-shaped grid (1) is used to intercept sundries at the water turbine inlet (211); A base (2) is provided with a communication channel (21) and a trash screen (22), one end of the communication channel (21) is a water inlet (211), the other end is a water outlet (212), the ring-shaped grid (1) is arranged at the water inlet (211) of the communication channel (21), and the water inlet (211) and the water outlet (212) are located on the two sides of the trash screen (22) respectively; A lifting assembly (3) is installed on the trash screen (22) to control the ring-shaped grid (1) to rise above the water surface and reset; A cleaning assembly (4) includes a high-pressure water spraying mechanism (41) connected with the trash screen (22) to spray high-pressure water flow to the ring-shaped grid (1) above the water surface to clean the ring-shaped grid (1).

2. A trash rack for pumped storage hydroelectric power plants according to claim 1, characterized in that, The lifting assembly (3) includes a telescopic cylinder (31), a lifting plate (32) and a lifting shaft (33), the telescopic cylinder (31) is fixedly connected with the trash screen (22), the lifting plate (32) is fixedly connected with the output shaft of the telescopic cylinder (31), the lifting plate (32) is connected with the top of the lifting shaft (33), and the bottom of the lifting shaft (33) is connected with the ring-shaped grid (1) to control the lifting of the ring-shaped grid (1).

3. A trash rack for pumped storage hydroelectric power plants according to claim 2, characterized in that, The high-pressure water spraying mechanism (41) includes a high-pressure pump (411), a water inlet pipe (412) and a water outlet pipe (413) connected with each other, the high-pressure pump (411) is fixedly connected on the trash screen (22), the water outlet pipe (413) is connected on the lifting plate (32), and part of the water outlet pipe (413) is vertically arranged along the lifting shaft (33), the water outlet pipe (413) vertically arranged along the lifting shaft (33) is a spraying section, a plurality of water spraying holes (4131) are arranged on the spraying section, and the water spraying holes (4131) are opposite to the ring-shaped grid (1).

4. A trash rack for pumped storage hydroelectric power plants according to claim 3, characterized in that, The water spraying holes (4131) are arranged in a row along the length direction of the spraying section, the cleaning assembly (4) further includes a rotating mechanism (42) for controlling the rotation of the ring-shaped grid (1) around the spraying section, the rotating mechanism (42) includes a rotating motor (421), a first gear (422) and a second gear (423), the rotating motor (421) is fixedly installed on the lifting plate (32), the first gear (422) is fixedly connected with the output shaft of the rotating motor (421), the second gear (423) is fixedly connected with the top of the lifting shaft (33), and the first gear (422) is engaged with the second gear (423), wherein the diameter of the first gear (422) is smaller than the diameter of the second gear (423).

5. A trash rack for pumped storage hydroelectric power plants according to claim 4, characterized in that, The bottom of the ring-shaped grid (1) is provided with a hollow bottom plate (11), and the lifting shaft (33) is connected at the center position of the hollow bottom plate (11) to drive the lifting and rotation of the ring-shaped grid (1).

6. A trash rack for pumped storage hydroelectric power plants according to claim 5, characterized in that, The hollow bottom plate (11) is connected with a dirt separation cylinder (12), when the ring-shaped grid (1) is above the water surface, the bottom of the dirt separation cylinder (12) is still in the communication channel (21) to prevent impurities from entering the communication channel (21).

7. A trash rack for pumped storage hydroelectric power plants according to claim 6, characterized in that, Further comprising a ring-shaped pool (5) fixedly installed on the dirt blocking plate (22), the ring-shaped pool (5) is provided with a front baffle (6), when the high-pressure water spraying mechanism (41) cleans the ring-shaped grid (1), the ring-shaped grid (1) penetrates the ring-shaped pool (5), the high-pressure water spraying mechanism (41) sprays water towards the front baffle (6), so that the impurities on the ring-shaped grid (1) fall into the ring-shaped pool (5) by the blocking action of the front baffle (6).

8. A trash rack for pumped storage hydroelectric power plants according to claim 7, characterized in that, The bottom of the ring-shaped grid (1) is provided with a radial grid (7) extending outward from the bottom of the ring-shaped grid (1) to collect the impurities falling from the ring-shaped grid (1).

9. A trash rack for pumped storage hydroelectric power plants according to claim 7, characterized in that, The ring-shaped inner side wall (51) of the ring-shaped pool (5) is lower than the ring-shaped outer side wall (52), when the high-pressure water spraying mechanism (41) cleans the ring-shaped grid (1), the end of the radial grid (7) away from the ring-shaped grid (1) is higher than the inner side wall of the ring-shaped pool (5) and lower than the outer side wall of the ring-shaped pool (5).

10. A trash rack for pumped storage hydroelectric power plants according to claim 8, characterized in that, The radial grid (7) extends obliquely upward in the direction away from the ring-shaped grid (1).

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