Trash rack cleaning device for water intake of hydropower plant

Abstract

The application provides a trash cleaning device of a trash rack for a water inlet of a hydropower plant, comprising a water inlet, a trash cleaning brush assembly, a moving assembly and a trash rack, the trash cleaning brush assembly is arranged on the water inlet; grooves are arranged on the opposite side walls of the water inlet; the moving assembly is arranged in the grooves; the trash rack is arranged between the two moving assemblies, the net bag part of the trash rack is arranged towards the water surface, and the trash cleaning brush assembly is located on the backwater surface of the trash rack. The trash rack is driven to lift along the vertical direction by the moving assembly, the large-volume sundries deposited in the hard deposition area of the bottom wall of the trash rack and the pollutants floating on the surface of the trash rack are lifted synchronously to completely separate from the water surface, exposed to the external operation space, and no sundries are left for cleaning. Meanwhile, the design of the connecting assembly realizes quick disassembly and assembly of the trash rack, significantly improves the replacement efficiency, and reduces the maintenance cost.

Description

Technical Field

[0001] This application belongs to the technical field of trash racks at the intake of hydropower plants, specifically relating to a trash rack cleaning device for use at the intake of hydropower plants. Background Technology

[0002] Hydropower, as a clean energy source, has power stations built on rivers. However, rivers often contain large amounts of man-made debris and floating logs, causing severe blockage of the fixed trash racks at the intake, excessive pressure differentials, and reduced generator output. In severe cases, the units are even forced to shut down for cleaning, resulting in economic losses. Existing technologies, such as the patent with publication number CN209836950U, while addressing the problem of small aquatic plants and plastic debris entangled in the intake trash racks through a structural design of the cleaning device, cannot remove larger debris intercepted by the racks. Furthermore, trash racks are constantly submerged in water, and even with regular maintenance, they have a limited lifespan. Replacing trash racks that have reached the end of their lifespan is cumbersome and cannot be quickly disassembled and reassembled. Utility Model Content

[0003] Therefore, the purpose of this application is to provide a cleaning device for a trash rack at the intake of a hydropower plant, which at least solves one of the technical problems mentioned in the background art.

[0004] To address the aforementioned problems, this application provides a cleaning device for a trash rack at the intake of a hydropower plant, comprising an intake, a cleaning brush assembly, a moving assembly, and a trash rack. The cleaning brush assembly is disposed on the intake. A groove is formed on the opposite side wall of the intake. The moving assembly is disposed within the groove. The trash rack is disposed between two of the moving assemblies, with the net portion of the trash rack facing the water-facing side, and the cleaning brush assembly located on the back side of the trash rack.

[0005] Optionally, the trash rack includes a mesh bag portion and a connecting portion, the two ends of the connecting portion being connected to the corresponding movable components so that the trash rack is installed on the movable components; the mesh bag portion is connected to the connecting portion.

[0006] Optionally, the moving component includes a chute and a slider. The chute is disposed within the groove of the water inlet, and the slider is disposed within the chute and moves relative to the slider. A lead screw is threadedly connected inside the slider, and the rotation of the lead screw drives the slider to move along the chute to clean the trash rack.

[0007] Optionally, the moving component includes a drive unit disposed at the top of the inlet, and the output end of the drive unit is connected to the top of the lead screw for driving the lead screw to rotate.

[0008] Optionally, the cleaning brush assembly includes a cleaning brush and a connecting plate, the connecting plate being disposed on the water inlet, and the cleaning brush being disposed on the water-facing surface of the connecting plate.

[0009] Optionally, the bottom of the cleaning brush is higher than the water surface flowing through the inlet.

[0010] Optionally, the cleaning device further includes a connecting component for connecting the movable component and the trash rack.

[0011] Optionally, the connecting assembly includes a support plate fixedly connected to the slider and a placement block fixedly connected to the side wall of the trash rack. Both the support plate and the placement block are provided with a first limiting hole, and a limiting rod is inserted into the first limiting hole to fix the placement block on the support plate.

[0012] Optionally, the connecting assembly further includes an elastic insert, and the limiting rod has second limiting holes at both ends. The elastic insert is inserted into the second limiting holes to restrict the axial movement freedom of the limiting rod.

[0013] Optionally, the limiting rod is provided with tapered guide portions at both ends.

[0014] By employing the above technical solution, this utility model application has at least the following beneficial effects:

[0015] This application provides a cleaning device for a trash rack at the intake of a hydropower plant. By using a moving component to drive the trash rack vertically upwards, it effectively removes large-volume debris deposited in the hard sedimentation zone on the bottom wall of the trash rack, as well as pollutants floating on its surface. As the trash rack is simultaneously lifted until it is completely removed from the water surface and exposed to the external operating space, thorough cleaning is achieved. Furthermore, the design of the connecting components allows for rapid assembly and disassembly of the trash rack, significantly improving replacement efficiency, reducing maintenance costs, and enhancing the operational efficiency and economic benefits of the hydropower plant. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cleaning device structure of a trash rack for a hydropower plant intake according to an embodiment of this application;

[0017] Figure 2 This is a schematic diagram of the moving component of the cleaning device for a trash rack at the intake of a hydropower plant, according to an embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the cleaning device connection assembly of a trash rack for a hydropower plant inlet according to an embodiment of this application;

[0019] Figure 4 This is a split-out external view of the cleaning device of the trash rack for the water inlet of a hydropower plant according to an embodiment of this application.

[0020] The reference numerals in the attached figures are as follows:

[0021] 1. Water inlet; 2. Connecting plate; 3. Cleaning brush; 4. Moving component; 41. Slide groove; 42. Slider; 43. Lead screw; 44. Drive motor; 5. Connecting component; 51. Support plate; 52. Placement block; 53. Limiting rod; 54. Elastic insert; 6. Trash rack. Detailed Implementation

[0022] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] See also Figures 1 to 4As shown in the embodiment of this application, a cleaning device for a trash rack at the intake of a hydropower plant is provided, including an intake 1, a cleaning brush assembly, a moving assembly 4, and a trash rack 6. The cleaning brush assembly is disposed on the intake 1. A groove is formed on the side wall of the intake 1 opposite to the water inlet, and the moving assembly 4 is disposed in the groove. The trash rack 6 is disposed between the two moving assemblies 4, with the net portion of the trash rack 6 facing the water-facing side, and the cleaning brush 3 located on the back side of the trash rack 6.

[0027] By driving the trash rack 6 vertically upwards using the moving component 4, large-volume debris deposited in the hard sedimentation zone on the bottom wall of the trash rack 6 and pollutants floating on the surface of the trash rack 6 are simultaneously lifted to be completely removed from the water surface and exposed to the external operating space, achieving thorough cleaning.

[0028] In this embodiment, the water inlet 1 includes two directions: a vertical direction and a width direction.

[0029] The cleaning brush assembly is set on the water inlet 1. That is, the cleaning brush assembly is set in the width direction of the water inlet 1, and the length is equal to the width of the water inlet 1. The purpose of this setting is to ensure that the cleaning brush assembly can completely cover the trash rack 6 for thorough cleaning and to avoid clogging of the mesh.

[0030] The inlet 1 has a groove on its opposite sidewall, and the moving component 4 is installed in the groove. That is, the groove is opened on the sidewall of the inlet 1 that is in contact with the water, and is opened in the vertical direction. The moving component 4 is installed in the groove, and the groove enables the moving component 4 to be installed on the inlet 1. The moving component 4 drives the trash rack 6, so that the trash rack 6 can move in the vertical direction until the trash rack 6 is completely exposed outside the water surface, thereby thoroughly cleaning large debris and floating objects in the net bag of the trash rack 6.

[0031] The trash rack 6 is positioned between two movable components 4, with the net portion of the trash rack 6 facing the water-facing side and the cleaning brush 3 located on the back side of the trash rack 6. In other words, the two side walls of the trash rack 6 are connected to the corresponding movable components 4, meaning that there are two sets of movable components 4. During the lifting process, the weight of the trash rack 6 is transferred to the movable components 4. Setting two sets of movable components 4 can evenly distribute the weight of the trash rack 6 to both sides, avoiding structural deformation or damage caused by excessive force on one side, while also maintaining the stability of the lifting process.

[0032] The net portion of the trash rack 6 is arranged facing the water-facing side, while the cleaning brush 3 is located on the back side of the trash rack 6. In this embodiment, the water-facing side is the surface impacted by the water flow, while the back side is the surface not impacted by the water flow. Here, with the net portion of the trash rack 6 facing the water-facing side, the water flow can directly impact the net portion, effectively intercepting debris and floating objects carried in the water flow. This makes it easier for the debris in the net portion to be collected and cleaned under the propulsion of the water flow.

[0033] In another embodiment, the trash rack 6 includes a mesh portion and a connecting portion, with both ends of the connecting portion connected to corresponding movable components 4 so that the trash rack 6 is mounted on the movable components 4; the mesh portion is connected to the connecting portion.

[0034] The connecting part is a vertically arranged mesh, and the net bag part is located in the lower middle part of the connecting part and is connected to the bottom end and side wall of the connecting part to form a trash rack 6.

[0035] Specifically, a hard sedimentation zone is provided on the inner bottom of the net section. This zone is fully exposed to the outside space after the debris barrier 6 is removed from the water surface. The hard sedimentation zone provides a rigid bearing surface for the intercepted debris, allowing heavy pollutants such as gravel and metal fragments to concentrate and settle in this area. Once the debris barrier 6 is completely removed from the water surface, the debris in the hard sedimentation zone is directly exposed to the operator's view, facilitating manual cleaning and achieving a highly efficient and thorough cleaning effect.

[0036] More specifically, the hard sedimentation zone is made of hard stainless steel plate, which has high stability and rigidity, and can effectively prevent the deposited debris from being washed back into the water due to water flow impact or vibration during the cleaning process, ensuring the thoroughness of the cleaning work.

[0037] In another embodiment, the moving component 4 includes a chute 41 and a slider 42. The chute 41 is disposed in the groove of the inlet 1, and the slider 42 is disposed in the chute 41. The slider 42 moves relative to the slider 42. The slider 42 is internally threaded with a lead screw 43. The rotation of the lead screw 43 drives the slider 42 to move along the chute 41 to clean the trash rack 6.

[0038] The slide 41 is set in the groove of the water inlet 1; the shape of the slide 41 is consistent with the shape of the groove, which facilitates the installation and fixing of both.

[0039] Specifically, in this embodiment, the groove 41 has a circular cross-sectional shape and an opening at one end; the slider 42 is cylindrical and has a mounting portion on its outer surface that passes through the opening of the groove 41; the circular groove and slider 42 cooperate to avoid stress concentration surfaces and reduce wear on the slider 42 or the groove 41. In other embodiments, the cross-sectional shape of the groove 41 and the shape of the slider 42 can be adjusted according to specific circumstances.

[0040] The specific working process is as follows: the rotation of the lead screw 43 converts its own rotational motion into the motion of driving the slider 42 to move in the vertical direction, thereby driving the trash rack 6 to switch between the working position and the cleaning position.

[0041] In another embodiment, the moving component 4 includes a drive unit disposed at the top of the inlet 1, and the output end of the drive unit is connected to the top of the lead screw 43 for driving the lead screw 43 to rotate.

[0042] The drive unit is located at the top of the inlet 1, meaning that the drive unit is installed on the top surface of the inlet 1. The drive unit is used to provide power for the rotation of the lead screw 43.

[0043] Specifically, the output end of the drive unit is connected to the top of the lead screw 43 via a coupling. The coupling ensures that the output shaft of the drive unit and the lead screw 43 are precisely aligned, maintaining good coaxiality during operation. This reduces vibration and wear caused by misalignment, thereby improving transmission accuracy.

[0044] More specifically, the drive unit is a waterproof drive motor 44.

[0045] In another embodiment, the cleaning brush assembly includes a cleaning brush 3 and a connecting plate 2. The connecting plate 2 is disposed on the water inlet 1, and the cleaning brush 3 is disposed on the water-facing surface of the connecting plate 2.

[0046] The connecting plate 2 is located at the top of the inlet 1 along the width direction of the inlet 1 and is fixedly installed with the inlet 1 to prevent positional displacement during cleaning of the trash rack 6.

[0047] The connecting plate 2 is equipped with a cleaning brush 3 on its water-facing side. In other words, the cleaning brush 3 is located on the back side of the trash rack 6. When the trash rack 6 is moved upward by the moving component 4, it comes into contact with the cleaning brush 3 to clean the net-shaped trash rack 6, so as to avoid the mesh being blocked, thus affecting the water flow and maintaining the smooth flow of water.

[0048] In another embodiment, the bottom of the cleaning brush 3 is higher than the water surface flowing through the inlet 1. Setting the bottom of the cleaning brush 3 above the water surface can effectively prevent the water flow from directly impacting the cleaning brush 3 and causing wear.

[0049] In another embodiment, the cleaning device further includes a connecting component 5 for connecting the movable component 4 and the trash rack 6. Connecting the trash rack 6 to the movable component 4 via the connecting component 5 enables a detachable connection between the trash rack 6 and the movable component 4, allowing for quick assembly and disassembly of the trash rack 6 on the movable component 4 and significantly improving replacement efficiency.

[0050] In another embodiment, the connecting component 5 includes a support plate 51 fixedly connected to the slider 42 and a placement block 52 fixedly connected to the side wall of the trash rack 6. Both the support plate 51 and the placement block 52 are provided with a first limiting hole, and a limiting rod 53 is inserted into the first limiting hole to fix the placement block 52 on the support plate 51.

[0051] The support plate 51 is bent from both ends of the plate to the same side to form an installation groove, and the placement block 52 is installed in the installation groove of the support plate 51; this makes the size of the connecting component 5 smaller, avoiding large gaps between the trash rack 6 and the side wall of the inlet 1, which would affect the trash-blocking effect.

[0052] The support plate 51 is fixedly connected to the slider 42. When the support plate 51 is welded to the slider 42, the opening of the support plate 51 is arranged facing upward.

[0053] Both the tray 51 and the placement block 52 are provided with a first limiting hole, and a limiting rod 53 is inserted into the first limiting hole. That is to say, after the placement block 52 is installed on the tray 51, the first limiting hole on the tray 51 is coaxial with the first limiting hole on the placement block 52, so that the limiting rod 53 can be inserted into the first limiting hole to fix the placement block 52 on the tray 51, thus realizing the detachable connection between the placement block 52 and the tray 51.

[0054] The bottom of the mounting slot of the tray 51 is provided with anti-slip texture, and the contact surface between the placement block 52 and the bottom of the tray 51 is provided with a serrated concave-convex surface. The two fit together to limit the horizontal displacement of the placement block 52.

[0055] In another embodiment, the connecting component 5 further includes an elastic insert 54. The limiting rod 53 has second limiting holes at both ends. The elastic insert 54 is inserted into the second limiting holes to form a self-locking structure, thereby restricting the axial movement freedom of the limiting rod 53. Since the arrangement direction of the limiting rod 53 is the same as the water flow direction, the elastic insert 54 is installed in the second limiting holes at both ends of the limiting rod 53 to restrict the axial movement freedom of the limiting rod 53. That is, even under continuous water flow impact, the limiting rod 53 will not slip out of the first limiting groove.

[0056] In another embodiment, the limiting rod 53 is provided with tapered guide portions at both ends. The tapered guide portions make it easier to install and remove the limiting rod 53 from the first limiting hole.

[0057] By connecting the tray 51 of the component 5 and the placement block 52, the serrated concave and convex surface at the bottom of the placement block 52 fits into the anti-slip texture of the tray 51 for positioning. The tapered guides at both ends of the limiting rod 53 guide the elastic insert 54 into the insertion hole to form a self-locking mechanism, thereby enabling the quick assembly and disassembly of the placement block 52 and the tray 51 of the trash rack 6, significantly improving the replacement efficiency.

[0058] The specific process for replacing trash rack 6 is as follows:

[0059] When replacing the trash rack 6, the operator pulls out the elastic insert 54 from the second limiting holes at both ends of the limiting rod 53, releases the self-locking structure, and then pulls out the limiting rod 53. At this time, the placement block 52, which is fixedly connected to the trash rack 6, is released from the fitting constraint of the anti-slip texture on the surface of the support plate 51, and the trash rack 6 and the placement block 52 can be removed as a whole. Place the placement block 52 of the new trash rack 6 on the surface of the support plate 51 so that the serrated concave and convex surface fits into the anti-slip texture. Then, the tapered guide at both ends of the limiting rod 53 passes through the first limiting hole of the placement block 52 and the support plate 51. Finally, the elastic insert 54 is inserted into the second limiting holes at both ends of the limiting rod 53 to complete the quick installation.

[0060] The specific cleaning principle of the trash rack cleaning device at the intake of a hydropower plant is as follows:

[0061] When the drive unit starts, it rotates the lead screw 43, causing the threaded slider 42 to move vertically upward in the groove 41 fixed in the inlet 1. At the same time, the support plate 51 fixed to the side of the slider 42 drives the trash rack 6 to rise and fall synchronously through the placement block 52. During the rising process of the trash rack 6, the outer surface of its connecting part continuously adheres to the cleaning brush 3 to remove flexible entangled materials (such as aquatic plants, plastic film, etc.) until the trash rack 6 is completely removed from the water surface, exposing the hard deposit area on the inner bottom wall. At this time, the deposited large debris can be cleaned manually. After cleaning, the drive unit rotates the lead screw 43, causing the threaded slider 42 to move vertically downward in the groove 41 fixed in the inlet 1 until the trash rack 6 returns to its original position.

[0062] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0063] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A cleaning device for a trash rack at the intake of a hydropower plant, comprising an intake (1), characterized in that, It also includes a cleaning brush assembly, which is disposed on the water inlet (1); The movable component (4) has a groove on the side wall opposite to the water inlet (1); the movable component (4) is disposed in the groove. A trash rack (6) is disposed between two of the movable components (4), with the net portion of the trash rack (6) facing the water-facing side, and the cleaning brush assembly located on the back side of the trash rack (6).

2. The cleaning device for a trash rack at the intake of a hydropower plant according to claim 1, characterized in that, The trash rack (6) includes a net bag and a connecting part. The two ends of the connecting part are connected to the corresponding moving component (4) so ​​that the trash rack (6) is installed on the moving component (4); the net bag is connected to the connecting part.

3. The cleaning device for a trash rack at the intake of a hydropower plant according to claim 1, characterized in that, The moving component (4) includes a chute (41) and a slider (42). The chute (41) is disposed in the groove of the inlet (1). The slider (42) is disposed in the chute (41) and moves relative to the slider (42). The slider (42) is internally threaded with a lead screw (43). The lead screw (43) rotates to drive the slider (42) to move along the chute (41) to clean the trash rack (6).

4. The cleaning device for a trash rack at the intake of a hydropower plant according to claim 3, characterized in that, The moving component (4) includes a drive unit, which is located at the top of the inlet (1). The output end of the drive unit is connected to the top of the lead screw (43) for driving the lead screw (43) to rotate.

5. The cleaning device for a trash rack at the intake of a hydropower plant according to claim 1, characterized in that, The cleaning brush assembly includes a cleaning brush (3) and a connecting plate (2). The connecting plate (2) is disposed on the water inlet (1), and the cleaning brush (3) is disposed on the water-facing surface of the connecting plate (2).

6. The cleaning device for a trash rack at the intake of a hydropower plant according to claim 5, characterized in that, The bottom of the cleaning brush (3) is higher than the water surface flowing through the inlet (1).

7. A trash rack cleaning device for a hydropower plant intake as described in claim 3, characterized in that, The cleaning device further includes a connecting component (5) for connecting the movable component (4) and the trash rack (6).

8. A trash rack cleaning device for a hydropower plant intake as described in claim 7, characterized in that, The connecting assembly (5) includes a support plate (51) fixedly connected to the slider (42) and a placement block (52) fixedly connected to the side wall of the trash rack (6). Both the support plate (51) and the placement block (52) are provided with a first limiting hole, and a limiting rod (53) is inserted into the first limiting hole to fix the placement block (52) on the support plate (51).

9. A trash rack cleaning device for a hydropower plant intake as described in claim 8, characterized in that, The connecting component (5) further includes an elastic insert (54). The limiting rod (53) has second limiting holes at both ends. The elastic insert (54) is inserted into the second limiting holes to limit the axial movement freedom of the limiting rod (53).

10. A trash rack cleaning device for a hydropower plant intake according to claim 8, characterized in that, The limiting rod (53) has tapered guides at both ends.

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