Movable trash rack of water inlet of hydropower station

Abstract

The present application belongs to the technical field of river pollution blocking, and particularly relates to a movable pollution blocking device for a water inlet of a hydropower station. The pollution blocking device is installed at the water inlet of the hydropower station and comprises a rack, a pollution blocking fence, a chain belt transmission mechanism, a rake tooth assembly and a baffle. The rack is obliquely arranged at the water inlet. The pollution blocking fence is arranged at the water inlet surface of the rack so that the water inlet surface of the rack allows water flow. The chain belt transmission mechanism is distributed along the inner cavity of the rack. The chain on the chain belt transmission mechanism reciprocates up and down in the cavity of the rack. When the chain belt transmission mechanism moves in the rack, a space formed between the chain belt transmission mechanism and the cavity wall of the rack is a moving path. The present application can make the rake teeth retract inward to form an included angle with the baffle, so as to better collect the floating objects, and the rake teeth can capture and collect smaller floating objects. The rake teeth are arranged behind the pollution blocking fence, so that the rake teeth are not easy to interfere with the fence and cause the rake to be stuck.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of river pollution blocking, and particularly relates to a movable pollution blocking device for a water inlet of a hydropower station. BACKGROUND

[0002] The water inlet of a hydropower station is a crucial component of the entire power generation system, which is responsible for introducing water flow from a reservoir or a river to drive the generator set to generate electricity; a rationally designed water inlet of a hydropower station can not only ensure the power generation efficiency, but also effectively reduce the impact on the environment and protect the aquatic ecosystem.

[0003] The water inlet is usually located at the downstream end of the reservoir or the bank of the river, and its design needs to consider various factors, including water flow characteristics, silt content, aquatic organism protection, etc. The water inlet structure includes key components such as a trash rack, a gate, an opening and closing machine, etc., which work together to ensure that the water flow enters the power generation system stably and uniformly.

[0004] Among them, the trash rack is the first line of defense of the water inlet, which can intercept floating objects and large impurities in the water to protect subsequent equipment from damage. The existing cleaning device is a rotary grid chain assembled by rake teeth. Under the drive of the motor reducer, the rake tooth chain performs reverse water flow direction rotation. When the rake tooth chain operates to the upper part of the device, due to the guidance of the groove wheel and the curved rail, the solid materials on each group of rake teeth fall down by gravity, completing the reciprocating salvage work. However, the existing technology still has the following technical problems: during the salvage process, the rake teeth are always in the outward angle state, and cannot be folded during the rotation of the discharged materials, resulting in the leakage of the discharged materials. SUMMARY

[0005] The purpose of the present application is to provide a movable pollution blocking device for a water inlet of a hydropower station, which can make the rake teeth inward, form an angle with the material blocking plate, better fold the salvaged floating objects, capture and collect smaller floating objects such as leaves, branches, grass strips, etc., and place the rake teeth behind the back of the trash barrier to avoid interference with the barrier and the rake jamming failure.

[0006] The technical solutions adopted by the present application are as follows:

[0007] The utility model provides an activity type of damming device of water intake of a hydropower station, which is installed at the water intake of the hydropower station and comprises a rack, a sewage intercepting fence, a chain belt transmission mechanism, a rake assembly and a material blocking plate. The rack is obliquely arranged at the water intake. The sewage intercepting fence is arranged at the water inlet surface of the rack, so that the water inlet surface of the rack allows water flow to pass through. The chain belt transmission mechanism is distributed along the inner cavity of the rack. The chain on the chain belt transmission mechanism reciprocates up and down in the cavity of the rack. When the chain belt transmission mechanism moves in the rack, the space formed between the chain belt transmission mechanism and the cavity wall of the rack is the moving path. The rake assembly is transversely arranged on the chain belt transmission mechanism. The rake assembly moves up and down in the moving path under the driving of the chain belt transmission mechanism. The rake assembly starts to salvage from the bottom end of the rack and slowly moves upward. The material blocking plate is transversely arranged in the inner part of the rack. When the rake assembly moves to the position of the material blocking plate, the rake assembly is turned over to hold the salvaged materials in the pocket.

[0008] In a preferred embodiment, the sewage intercepting fence comprises a plurality of low-surface fence plates that are equidistantly distributed at the water inlet surface of the rack. The spacing between the low-surface fence plates forms a water inlet channel.

[0009] The sewage intercepting fence further comprises a high-surface fence plate arranged at the bottom surface of the rack.

[0010] The bottom surface of the low-surface fence plate forms a convex triangular surface. The position of the triangular surface is fixed by a first reinforcing rib provided on the top surface of the high-surface fence plate. The bottom surface of the high-surface fence plate is provided with a second reinforcing rib, and the two ends of the second reinforcing rib are connected to the corresponding side walls of the rack.

[0011] In a preferred embodiment, the vertical surface of the high-surface fence plate is higher than the vertical surface of the low-surface fence plate, so that the high-surface fence plate and the corresponding position of the rack form a cavity surface for the rake assembly to rotate and move at the bottom of the rack.

[0012] In a preferred embodiment, the chain belt transmission mechanism comprises a driving sprocket transversely arranged at the top of the rack; and

[0013] a tension sprocket horizontally arranged with the driving sprocket; and

[0014] a rotating sprocket arranged at the bottom of the rack. The above-mentioned sprockets are arranged at both sides of the inner part of the rack and are connected by a rotating shaft at the corresponding positions, so that they can be fixedly rotated in the rack.

[0015] The chain is drivingly connected with the driving sprocket, the tension sprocket and the rotating sprocket at both sides.

[0016] In a preferred embodiment, the rake assembly comprises

[0017] a fixed seat mounted on the chain at both sides; and

[0018] A connecting shaft, two ends of the connecting shaft are connected with the two fixed seats, and fixed clamping rings are equidistantly arranged on the connecting shaft, wherein the fixed clamping rings are arranged corresponding to the low fence plates, and movable clamping rings are rotatably sleeved between the two fixed clamping rings.

[0019] In a preferred embodiment, the bottom surface of the fixed clamping ring is slotted to form a gap, and the two adjacent movable clamping rings are connected through a connecting block arranged at the position of the gap, so that the two adjacent movable clamping rings can rotate together and are limited by the fixed clamping ring.

[0020] In a preferred embodiment, the outer ring surface of the movable clamping ring is provided with long-end tines and short-end tines extending outward at two opposite sides, respectively, the length of the long-end tines is greater than that of the short-end tines, and the long-end tines are used for salvaging materials in the water inlet.

[0021] In a preferred embodiment, the material blocking plate is located at the rear of the tine assembly and at the upper side inside the rack.

[0022] In a preferred embodiment, a first magnetic block is embedded on the side of the connecting block facing the low fence plate, a second magnetic block is embedded on the surface of the fixed clamping ring corresponding to the first magnetic block, and the first magnetic block and the second magnetic block are attracted to each other.

[0023] In a preferred embodiment, when the tine assembly does not reach the position of the material blocking plate, the long-end tines are naturally drooping under the influence of gravity, and the long-end tines are in an outward state;

[0024] When the tine assembly reaches the position of the material blocking plate, the bottom end of the short-end tines is in contact with the material blocking plate, is resisted by the material blocking plate and is limited by the material blocking plate, and the long-end tines are rotated to be in an inward state.

[0025] The technical effects achieved by the present application are as follows:

[0026] Compared with the conventional fence, the present application eliminates the middle horizontal reinforcing plate, in order to ensure that the sewage intercepting fence can resist water flow impact for a longer time, the design of the outwardly protruding triangular shape at the bottom surface of the low fence plate can help to divide water pressure and is more helpful to help the fence resist water flow impact, so that the fence as a whole has better impact resistance, and the outwardly protruding triangular shape is fixed with the top surface of the high fence plate through a first reinforcing rib, the bottom surface of the high fence plate is fixed with the rack through a second reinforcing rib, the reinforcing plate originally arranged at the back of the fence is moved to the front of the sewage intercepting fence, the structure integrity of the sewage intercepting fence is ensured without affecting the rotation and walking of the tine assembly inside the rack, so that the fence is not prone to fatigue deformation after long-term use.

[0027] The chain in the application circulates to drive the connecting shaft, when the connecting shaft is located at the bottom of the rack, the long-end tines are in an extended state due to the influence of gravity, at this time, the first magnetic block and the second magnetic block are away from each other, when the long-end tines move upwards, the floating objects or large impurities and other garbage materials intercepted outside the trash barrier are salvaged;

[0028] When the connecting shaft is located close to the material blocking plate, the bottom end of the short-end tine is in contact with the material blocking plate, is resisted by the material blocking plate and is limited by the material blocking plate, the long-end tine rotates to be in a retracted state, at this time, the first magnetic block and the second magnetic block are adsorbed to each other, when the long-end tine is retracted, an angle is formed with the material blocking plate, so that the salvaged floating objects are better retracted, and the salvaged garbage moves together with the chain until is discharged into the garbage truck, completes self-cleaning, and then is reset to the bottom of the rack for the next salvaging work;

[0029] Compared with the traditional trash intercepting device, the salvaging tine walking outside is changed to walking inside the rack, and the improvement is beneficial to capturing and collecting smaller floating objects such as leaves, branches, grass strips and the like behind the trash barrier, and the tine is placed behind the trash barrier and is not easy to interfere with the barrier to cause the tine to be stuck. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure in the application;

[0031] Figure 2 is a schematic diagram of the half-section structure of the trash intercepting device in the application;

[0032] Figure 3 is a schematic diagram of the tine assembly structure in the application;

[0033] Figure 4 is a schematic diagram of the separated structure of the tine assembly in the application;

[0034] Figure 5 is a schematic diagram of the enlarged structure of the details at A in the application Figure 4 ;

[0035] Figure 6 is a schematic diagram of the half-section structure of the trash intercepting device in the application;

[0036] Figure 7 is a schematic diagram of the enlarged structure of the details at B in the application Figure 6 ;

[0037] Figure 8 is a schematic diagram of the enlarged structure of the details at C in the application Figure 6 .

[0038] In the drawings, the component list represented by each reference sign is as follows:

[0039] 1, water inlet; 2, frame;

[0040] 3, intercepting barrier; 301, low barrier plate; 302, water inlet channel; 303, high barrier plate; 304a, first reinforcing rib; 304b, second reinforcing rib; 305, cavity surface;

[0041] 4, chain drive mechanism; 401, drive sprocket; 402, tension sprocket; 403, rotating sprocket; 404, chain;

[0042] 5, harrow assembly; 501, fixed seat; 502, connecting shaft; 503, fixed snap ring; 504, movable snap ring; 505, connecting block; 506, notch; 507, first magnetic block; 508, second magnetic block; 509a, long-end harrow tine; 509b, short-end harrow tine;

[0043] 6, walking path; 7, material blocking plate. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0045] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0046] The present application is described in detail in conjunction with the schematic drawings, and in the detailed description of the embodiments of the present application, the cross-sectional view of the device structure will be partially enlarged without the general proportion for the convenience of description, and the schematic drawings are only examples, which should not limit the scope of protection of the present application herein. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0047] The intercepting device based on the prior art is a rotating grid chain assembled by harrow tines. Under the drive of the motor reducer, the harrow tine chain performs a rotating motion against the water flow direction. When the harrow tine chain runs to the upper part of the device, due to the guidance of the groove wheel and the curved rail, the solid matter on each group of harrow tines falls by gravity. The operating principle of the device involved in the present application is almost the same as that of the conventional device, and the following improvements are made based on the conventional technology, specifically:

[0048] Please refer to the accompanying Figures 1-6As shown, the application provides a movable trash blocking device for the water inlet of a hydropower station, which comprises a water inlet 1 of the hydropower station, a rack 2, a trash blocking fence 3, a chain belt transmission mechanism 4, a rake assembly 5, and a material blocking plate 7. The rack 2 is obliquely arranged on the water inlet 1, and the trash blocking fence 3 is arranged on the water inlet surface of the rack 2 so that the water inlet surface of the rack 2 allows water flow. The chain belt transmission mechanism 4 is distributed along the inner cavity of the rack 2. The chain 404 on the chain belt transmission mechanism 4 reciprocates up and down in the cavity of the rack 2. When the chain belt transmission mechanism 4 walks inside the rack 2, the space formed between the chain belt transmission mechanism 4 and the cavity wall of the rack 2 is the walking path 6. The rake assembly 5 is transversely arranged on the chain belt transmission mechanism 4 and walks up and down in the walking path 6 under the driving of the chain belt transmission mechanism 4. The rake assembly 5 starts fishing from the bottom end of the rack 2 and slowly moves upward. The material blocking plate 7 is transversely arranged inside the rack 2. When the rake assembly 5 walks to the position of the material blocking plate 7, the rake assembly 5 is turned over and the inner buckle holds the fished materials.

[0049] Please refer to Figure 2 or Figure 6 The trash blocking fence 3 comprises a plurality of low-surface fence plates 301 that are equidistantly distributed on the water inlet surface of the rack 2. The spacing between the plurality of low-surface fence plates 301 forms a water inlet groove 302. The trash blocking fence 3 further comprises a high-surface fence plate 303 arranged on the bottom surface of the rack 2. The bottom surface of the low-surface fence plate 301 forms an outwardly protruding triangular surface. The position of the triangular surface is fixed to the top surface of the high-surface fence plate 303 by a first reinforcing rib 304a. The bottom surface of the high-surface fence plate 303 is provided with a second reinforcing rib 304b, and the two ends of the second reinforcing rib 304b are connected to the corresponding side walls of the rack 2. The vertical surface of the high-surface fence plate 303 is higher than that of the low-surface fence plate 301, so that the position of the high-surface fence plate 303 and the corresponding rack 2 forms a cavity surface 305 for the rake assembly 5 to rotate and walk at the bottom of the rack 2.

[0050] Compared with the conventional fence, the trash blocking fence 3 in the present application eliminates the middle transversely arranged reinforcing plate. To ensure that the trash blocking fence 3 can resist water flow impact for a longer time, the design of the outwardly protruding triangular surface on the bottom surface of the low-surface fence plate 301 can help to distribute water pressure and better help the fence to resist water flow impact, so that the fence as a whole has better impact resistance. The position of the outwardly protruding triangular surface is fixed to the top surface of the high-surface fence plate 303 by the first reinforcing rib 304a, and the bottom surface of the high-surface fence plate 303 is fixed to the rack 2 by the second reinforcing rib 304b. The reinforcing plate originally arranged at the back of the fence is moved to the front of the trash blocking fence 3. Without affecting the rotation and walking of the rake assembly 5 inside the rack 2, the overall structure of the trash blocking fence 3 is ensured, so that it is not prone to fatigue deformation after long-term use.

[0051] Please refer to Figure 2The chain drive mechanism 4 comprises a driving sprocket 401 horizontally arranged on the top of the frame 2, a tension sprocket 402 horizontally arranged with the driving sprocket 401, and a rotating sprocket 403 arranged on the bottom of the frame 2. The sprockets are arranged on both sides of the frame 2, and the corresponding sprockets are connected by rotating shafts so that they can rotate fixedly in the frame 2. The chain 404 is in driving connection with the driving sprocket 401, the tension sprocket 402 and the rotating sprocket 403.

[0052] Based on the above structure, the device for driving the sprocket to rotate is not shown in detail, which is not the main research direction of the present application. Any structure capable of driving the sprocket to rotate in the prior art can be arranged on the frame 2. The chain 404 can be driven to rotate in a manner that an industrial motor drives the sprocket to rotate. When the chain 404 rotates, the rake assembly 5 arranged on the chain 404 rotates together, thereby realizing the process of salvaging and discharging the materials on the rake.

[0053] Please refer to Figure 2 or Figure 3 、 Figure 4 、 Figure 5 The rake assembly 5 comprises a fixed seat 501 and a connecting shaft 502. The fixed seat 501 is installed on the chain 404. The connecting shaft 502 is connected to the fixed seats 501 at both ends. The connecting shaft 502 is provided with fixed clamping rings 503 at equal intervals. The fixed clamping rings 503 are arranged corresponding to the fence plate 301. The movable clamping rings 504 are rotatably sleeved between the two fixed clamping rings 503. The bottom surface of the fixed clamping ring 503 is slotted to form a gap 506. The two adjacent movable clamping rings 504 are connected by a connecting block 505 arranged therebetween. The connecting block 505 is located at the position of the gap 506, so that the two adjacent movable clamping rings 504 can rotate together and are limited by the fixed clamping ring 503.

[0054] Please refer to Figure 7 The outer ring surface of the movable clamping ring 504 is provided with long-end tines 509a and short-end tines 509b extending outward at opposite sides. The length of the long-end tine 509a is greater than that of the short-end tine 509b. The long-end tine 509a is used for salvaging the materials in the water inlet 1.

[0055] Specifically, the fixed clamping ring 503 on the connecting shaft 502 is arranged corresponding to the fence plate. The movable clamping ring 504 on the connecting shaft 502 is arranged corresponding to the water inlet 302. The length of the long-end tine 509a extends outward beyond the water inlet 302. When the long-end tine 509a moves upward, it holds the floating objects or large impurities and other garbage materials intercepted outside the fence 3. As the chain 404 moves upward, the intercepted garbage materials are also moved upward.

[0056] Based on the above structure, the opening angle of the gap 506 is ninety degrees to sixty degrees, and the application preferably takes sixty degrees as an example. The two movable clamps 504 are connected through the connecting block 505, so that the rotating angle is limited by the size of the gap 506 on the bottom surface of the fixed clamp 503. When rotating, the connecting block 505 is located inside the gap 506. With the movement of the connecting block 505 to different positions in the gap 506, the long-end tines 509a on the movable clamp 504 are extended at different angles.

[0057] Please refer to Figure 6 The material blocking plate 7 is located behind the tine assembly 5 and on the upper side inside the rack 2.

[0058] Please refer to Figure 7 and Figure 8 The connecting block 505 is embedded with a first magnetic block 507 on the side facing the low surface fence plate 301. The fixed clamp 503 is embedded with a second magnetic block 508 corresponding to the first magnetic block 507. The first magnetic block 507 and the second magnetic block 508 are attracted to each other.

[0059] Please refer to Figure 7 and Figure 8 When the tine assembly 5 does not reach the position of the material blocking plate 7, the long-end tines 509a naturally droop under the influence of gravity, and the long-end tines 509a are in an extended state.

[0060] When the tine assembly 5 reaches the position of the material blocking plate 7, the bottom end of the short-end tines 509b contacts the material blocking plate 7, is resisted by the material blocking plate 7, and is limited by the material blocking plate 7. The long-end tines 509a rotate to an inward state.

[0061] In combination with the above structure, the chain 404 rotates to drive the connecting shaft 502. When the connecting shaft 502 is located at the bottom of the rack 2, the long-end tines 509a are in an extended state due to their long length and the influence of gravity. At this time, the first magnetic block 507 and the second magnetic block 508 are far away from each other. When the long-end tines 509a move upward, they fish floating objects or large impurities and other garbage materials blocked outside the trash fence 3.

[0062] When the connecting shaft 502 is located close to the material blocking plate 7, the bottom end of the short-end tines 509b contacts the material blocking plate 7, is resisted by the material blocking plate 7, and is limited by the material blocking plate 7. The long-end tines 509a rotate to an inward state. At this time, the first magnetic block 507 and the second magnetic block 508 are attracted to each other. When the long-end tines 509a are retracted, they form an angle with the material blocking plate 7, which is convenient for better retracting the fished floating objects. The fished trash moves together with the chain 404 until it is discharged into the garbage truck, completing a self-cleaning, and then recycling to the bottom of the rack 2 for the next fishing work.

[0063] Based on the above, compared with the traditional sewage interception device, the fishing rake teeth walking outside are changed to walk inside the rack 2. The improvement is beneficial to capture and collect smaller floating objects such as leaves, branches, grass strips, etc. behind the sewage barrier 3, and the rake teeth are placed behind the sewage barrier 3, which is not easy to interfere with the barrier and cause rake failure.

[0064] It is worth further explaining that the present application can be matched with the fence according to the direction of the water flow. The gap between the long end rake teeth 509a on the rake assembly 5 can be selected according to the use condition. After the rake teeth separate the solid suspended matter in the fluid, it can ensure the smooth flow of the water flow. The whole working process is continuous or intermittent. The device can effectively reduce the pollution load of the river channel, keep the water clean, and reduce the mechanical damage of the generator of the power station.

[0065] The above is only the preferred embodiment of the present application. It should be pointed out that for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, unless otherwise specified and limited.

Claims

1. A movable trash rack of a water intake of a hydropower station, the trash rack is installed at a water intake (1) of a hydropower station, characterized in that: The utility model relates to a water intake device for water intake device Rack (2), the rack (2) is inclined to set up in the water inlet (1); The sewage fence (3) is arranged on the water inlet surface of the rack (2), so that the water inlet surface of the rack (2) can pass through the water flow; Chain drive mechanism (4) is distributed along the inner cavity of the rack (2), and the chain (404) on the chain drive mechanism (4) reciprocates up and down in the cavity of the rack (2), wherein the space formed between the cavity wall of the rack (2) and the chain drive mechanism (4) is the walking path (6) when the chain drive mechanism (4) walks inside the rack (2); The rake assembly (5) is transversely arranged on the chain drive mechanism (4), and the rake assembly (5) walks up and down in the walking path (6) driven by the chain drive mechanism (4), and the rake assembly (5) starts fishing from the bottom end of the rack (2) and slowly moves upward; The material baffle (7) is transversely arranged in the inner part of the rack (2), when the rake assembly (5) walks to the position of the material baffle (7), the rake assembly (5) turns over and holds the fished material in the inner part.

2. A movable trash rack for a water intake of a hydroelectric power station according to claim 1, characterized in that: The sewage fence (3) comprises a plurality of low-surface fence plates (301) equidistantly arranged on the water inlet surface of the rack (2), and the spacing between the plurality of low-surface fence plates (301) forms a water inlet groove (302); The sewage fence (3) further comprises a high-surface fence plate (303) arranged on the bottom surface of the rack (2); The bottom surface of the low-surface fence plate (301) forms a convex triangular surface, and the position of the triangular surface is fixed by a first reinforcing rib (304a) with the top surface of the high-surface fence plate (303), and the bottom surface of the high-surface fence plate (303) is provided with a second reinforcing rib (304b), and the two ends of the second reinforcing rib (304b) are connected to the corresponding side walls of the rack (2).

3. A movable trash rack for a water intake of a hydroelectric power station according to claim 2, characterized in that: The vertical surface of the high-surface fence plate (303) is higher than that of the low-surface fence plate (301), so that the high-surface fence plate (303) and the corresponding rack (2) form a cavity surface (305) at the position, which is used for the rake assembly (5) to walk in a rotary manner at the bottom of the rack (2).

4. A movable trash rack for a water intake of a hydroelectric power plant according to claim 1, characterized in that: The chain drive mechanism (4) comprises a driving sprocket (401) transversely arranged on the top of the rack (2); A tension sprocket (402) horizontally arranged with the driving sprocket (401); And A rotary sprocket (403) arranged on the bottom of the rack (2); wherein the above-mentioned sprockets are arranged on both sides of the inner part of the rack (2), and the sprockets at the corresponding positions are connected through the rotating shaft, so that they can rotate fixedly in the rack (2); The chain (404) is in transmission connection with the driving sprocket (401), the tension sprocket (402) and the rotary sprocket (403) on both sides.

5. A movable trash rack for a water intake of a hydroelectric power station according to any one of claims 1 to 4, characterized in that: The rake assembly (5) comprises A fixed seat (501) mounted on the chain (404) on both sides; And ​ A connecting shaft (502) is connected to two fixed seats (501) at both ends, and fixed clamping rings (503) are equidistantly arranged on the connecting shaft (502), wherein the fixed clamping rings (503) are arranged corresponding to the low fence plate (301), and movable clamping rings (504) are rotatably sleeved between two fixed clamping rings (503).

6. A movable trash rack for a water intake of a hydroelectric power station according to claim 5, characterized in that: The bottom surface of the fixed clamping ring (503) is notched to form a gap (506), and two adjacent movable clamping rings (504) are connected through a connecting block (505) arranged at the position of the gap (506), so that the two adjacent movable clamping rings (504) can rotate together and are limited by the fixed clamping ring (503).

7. A movable trash rack for a water intake of a hydroelectric power station according to claim 6, characterized in that: The outer ring surface of the movable clamping ring (504) is provided with long-end tines (509a) and short-end tines (509b) respectively at two opposite sides thereof, the length of the long-end tines (509a) is greater than that of the short-end tines (509b), and the long-end tines (509a) are used for salvaging materials in the water inlet.

8. A movable trash rack for a water intake of a hydroelectric power station according to claim 7, characterized in that: The material blocking plate (7) is located at the rear of the tine assembly (5) and on the upper side of the inside of the rack (2).

9. A movable trash rack for a water intake of a hydroelectric power station according to claim 8, characterized in that: A first magnetic block (507) is embedded on one side of the connecting block (505) facing the low fence plate (301), a second magnetic block (508) is embedded on the surface of the fixed clamping ring (503) corresponding to the first magnetic block (507), and the first magnetic block (507) and the second magnetic block (508) are attracted to each other.

10. A movable trash rack for a water intake of a hydroelectric power plant according to claim 8, characterized in that: When the tine assembly (5) does not reach the position of the material blocking plate (7), the long-end tines (509a) naturally droop under the influence of gravity, and the long-end tines (509a) are in an outward state; When the tine assembly (5) reaches the position of the material blocking plate (7), the bottom end of the short-end tines (509b) is in contact with the material blocking plate (7), is resisted by the material blocking plate (7) and is limited by the material blocking plate (7), and the long-end tines (509a) rotate to an inward state.

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