Anti-blocking trash rack device for trash removal of hydropower station

Abstract

The invention relates to the technical field of hydropower station equipment, and discloses an anti-blocking trash rack device for hydropower station trash disposal, which comprises a trash rack, the trash rack is mounted at a water inlet of a hydropower station, the trash rack comprises a fixed trash rack and a movable trash rack, the fixed trash rack is fixedly mounted at the water inlet of the hydropower station, and the movable trash rack is slidably connected with the fixed trash rack. The movable trash rack moves close to or away from the fixed trash rack, the fixed trash rack comprises a plurality of vertical trash rack pieces which are arranged at equal intervals in the horizontal direction, and the movable trash rack comprises a plurality of transverse trash rack pieces which are arranged at equal intervals in the vertical direction. The transverse barrier pieces make contact with the vertical barrier pieces to form a grid type barrier, and the movable trash rack moves away from the fixed trash rack so that a dredging space can be formed between the movable trash rack and the fixed trash rack. Dirt intercepted by the trash rack can be grabbed, and meanwhile fast dredging of the trash rack can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of hydropower station equipment, in particular to an anti-blocking trash rack device for cleaning pollution in a hydropower station. Background Art

[0002] Hydropower stations usually install trash racks at their water inlets to intercept waste. For example, the Ruili River Level 1 Hydropower Station has installed a three-hole trash rack at the front of the water inlet, with a depth of about 37m and a water flow velocity of about 3.54m / s. Due to the large amount of waste in the reservoir area of ​​the hydropower station during the flood season, the trash rack is easily blocked. The grab bucket of the existing waste cleaning device can only grab the waste accumulated in front of the trash rack, and cannot clean the blocked trash rack. As a result, the trash rack needs to be cleaned manually with equipment after it is blocked. Not only is the labor intensity high, but it also requires forced shutdown for dredging, resulting in loss of unit power generation and increased construction costs for cleaning the trash rack. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an anti-blocking trash rack device for cleaning sewage in a hydropower station, which can capture the sewage intercepted by the trash rack and realize the rapid dredging of the trash rack.

[0004] The objective of the present invention is achieved through the following technical solutions: A trash rack device for cleaning sewage in a hydropower station, comprising a trash rack, the trash rack being installed at the water inlet of the hydropower station, the trash rack comprising a fixed trash rack and a movable trash rack, the fixed trash rack being fixedly installed at the water inlet of the hydropower station, the movable trash rack being slidably connected to the fixed trash rack, the movable trash rack moving close to or away from the fixed trash rack, the fixed trash rack comprising a plurality of vertical trash rack pieces, the plurality of vertical trash rack pieces being equidistantly arranged in the horizontal direction, the movable trash rack comprising a plurality of transverse trash rack pieces, the plurality of transverse trash rack pieces being equidistantly arranged in the vertical direction, the plurality of transverse trash rack pieces contacting with the plurality of vertical trash rack pieces to form a grid-type trash rack, the movable trash rack moving away from the fixed trash rack to form a dredging space between the movable trash rack and the fixed trash rack;

[0005] It also includes a gantry mechanism and a garbage cleaning mechanism, the gantry mechanism includes a gantry frame and a movable beam, the gantry frame is installed directly above the garbage rack, the movable beam is movably installed on the gantry, and the moving direction of the movable beam is the same as the moving direction of the movable garbage rack, the garbage cleaning mechanism includes a traveling seat, an electric hoist and a garbage cleaning grab, the traveling seat is slidably installed on the movable beam, the moving direction of the traveling seat is perpendicular to the moving direction of the movable beam, the electric hoist is installed at the bottom of the traveling seat, and the lifting rope of the electric hoist is connected to the garbage cleaning grab.

[0006] Furthermore, the fixed trash rack further comprises a rectangular fixing frame, the vertical trash rack piece is located in the rectangular fixing frame, and the top and the bottom of the vertical trash rack piece are both fixedly connected to the rectangular fixing frame.

[0007] Furthermore, the movable trash rack also includes a rectangular movable frame, the transverse trash rack plate is located in the rectangular movable frame, and the left and right ends of the transverse trash rack plate are fixedly connected to the rectangular movable frame, hydraulic cylinders are arranged on both sides of the top of the rectangular fixed frame, the cylinder body of the hydraulic cylinder is fixedly mounted on the rectangular fixed frame, and the telescopic shaft of the hydraulic cylinder is connected to the rectangular movable frame.

[0008] Furthermore, the cleaning grab bucket includes a fixed bucket frame, a movable grab beam and a mounting beam, the mounting beam is located between the fixed bucket frame and the movable grab beam, the fixed bucket frame is fixedly connected to the mounting beam through a rib plate, the movable grab beam is hinged on the mounting beam, the bottom of the movable grab beam is equidistantly fixed with a plurality of arc-shaped grab teeth along its own length direction, a pushing hydraulic cylinder is provided on the top of the fixed bucket frame, the cylinder body of the pushing hydraulic cylinder is hinged on the fixed bucket frame, the telescopic shaft of the pushing hydraulic cylinder is hinged on the movable grab beam, a plurality of dredging tooth plates are fixed on one end of the fixed bucket frame away from the movable grab beam, a plurality of the dredging tooth plates are equidistantly arranged along the length direction of the fixed bucket frame, and the dredging tooth plates are used to extend between two adjacent vertical fence plates for cleaning.

[0009] Furthermore, a push bucket is fixed to one side of the fixed bucket frame, and one end of the push bucket away from the fixed bucket frame is concave to form a space.

[0010] Furthermore, a T-shaped track is fixed on the gantry, a T-shaped groove is provided at the bottom of the movable beam along the length direction of the T-shaped slide rail, the T-shaped track is slidably adapted in the T-shaped groove, a motor is fixed on the movable beam, the output shaft of the motor is connected to a gear, a rack is fixed on the gantry, the rack is parallel to the T-shaped track, and the gear meshes with the rack.

[0011] Furthermore, two mechanical limit blocks are fixed at intervals on the gantry, and the movable crossbeam is located between the two mechanical limit blocks. When the movable crossbeam contacts one of the mechanical limit blocks, the cleaning grab is located between the fixed trash rack and the movable trash rack. When the movable crossbeam contacts the other mechanical limit block, the cleaning grab is located on the outside of the fixed trash rack.

[0012] Furthermore, a stop button is provided at one end of the mechanical limit block close to the moving cross beam, an inner cavity is provided in the mechanical limit block, a pressure sensor is installed in the inner cavity, the pressure axis of the pressure sensor is located on the moving path of the stop button, a pressure plate is fixed to one end of the stop button close to the pressure sensor, a spring is sleeved on the stop button, and both ends of the spring are respectively connected to the pressure plate and the mechanical limit block.

[0013] Furthermore, rectangular grooves are provided at both ends of the movable crossbeam along its length direction, walking wheels are provided in the rectangular grooves, the wheel axles of the walking wheels are rotatably connected to the walking seat, a walking motor is provided in the walking seat, and the output shaft of the walking motor is connected to the wheel axle.

[0014] Furthermore, a positioning mechanism is provided on the top of the traveling seat, and a plurality of positioning holes are equidistantly provided on the bottom of the movable crossbeam along its length direction, the positioning mechanism includes a latch, and a mounting groove is provided on the top of the traveling seat, an electromagnet is installed in the mounting groove, a return spring is provided in the mounting groove, one end of the latch is slidably adapted in the mounting groove, and the two ends of the return spring are respectively connected to the traveling seat and the latch, a permanent magnet is fixed on one end of the latch close to the electromagnet, and the electromagnet generates a magnetic pole with the same magnetic property as the permanent magnet when energized, and when the latch is inserted into one of the positioning holes, the dredging tooth plate extends into between two adjacent vertical guardrail plates for cleaning.

[0015] The beneficial effects of the present invention are:

[0016] The trash rack is connected by a fixed trash rack and a mobile trash rack. When the trash rack is blocked, the mobile trash rack moves away from the fixed trash rack to separate the mobile trash rack from the fixed trash rack, thereby dividing the mesh rack into a transverse rack and a longitudinal rack, so that the dirt stuck on the mesh rack can fall off, thereby achieving rapid unblocking of the trash rack. At the same time, the mobile crossbeam can drive the garbage cleaning grab to switch positions, so that the dirt between the mobile trash rack and the fixed trash rack can be cleaned, and the dirt intercepted in front of the trash rack can be cleaned, thereby reducing the labor intensity and improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an anti-blocking trash rack device for cleaning pollution in a hydropower station according to the present invention;

[0018] Figure 2 It is a structural schematic diagram of a fixed trash rack in an anti-blocking trash rack device for cleaning pollution in a hydropower station according to the present invention;

[0019] Figure 3 It is a structural schematic diagram of a movable trash rack in an anti-blocking trash rack device for cleaning pollution in a hydropower station according to the present invention;

[0020] Figure 4 The structure of the gantry mechanism in the anti-blocking trash rack device for cleaning sewage in a hydropower station according to the present invention is shown in FIG. Figure 1 ;

[0021] Figure 5 The structure of the gantry mechanism in the anti-blocking trash rack device for cleaning sewage in a hydropower station according to the present invention is shown in FIG. Figure 2 ;

[0022] Figure 6 It is a structural schematic diagram of a garbage cleaning grab bucket in an anti-blocking garbage rack device for garbage cleaning in a hydropower station according to the present invention;

[0023] Figure 7 It is a schematic diagram of the internal structure of a mechanical limit block in an anti-blocking trash rack device for cleaning pollution in a hydropower station according to the present invention;

[0024] Figure 8 It is a schematic diagram of the internal structure of a traveling seat in an anti-blocking trash rack device for cleaning pollution in a hydropower station according to the present invention;

[0025] In the figure, 1-trash rack, 2-gantry, 3-movable crossbeam, 4-fixed trash rack, 5-movable trash rack, 6-vertical fence plate, 7-transverse fence plate, 8-travel seat, 9-electric hoist, 10-waste cleaning grab bucket, 11-rectangular fixed frame, 12-rectangular movable frame, 13-hydraulic cylinder, 14-fixed bucket frame, 15-movable grab beam, 16-mounting beam, 17-rib plate, 18-arc grab teeth, 19- Push hydraulic cylinder, 20-unblocking tooth plate, 21-push bucket, 22-T-shaped slide rail, 23-motor, 24-gear, 25-rack, 26-mechanical limit block, 27-stop button, 28-pressure sensor, 29-pressure plate, 30-spring, 31-rectangular groove, 32-travel wheel, 33-positioning hole, 34-latch, 35-installation groove, 36-electromagnet, 37-reset spring, 38-permanent magnet. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0027] like Figures 1 to 8As shown, a trash rack device for cleaning sewage in a hydropower station includes a trash rack 1, which is installed at the water inlet of the hydropower station. The trash rack 1 includes a fixed trash rack 4 and a movable trash rack 5. The fixed trash rack 4 is fixedly installed at the water inlet of the hydropower station. The movable trash rack 5 is slidably connected to the fixed trash rack 4. The movable trash rack 5 moves close to or away from the fixed trash rack 4. The fixed trash rack 4 includes a plurality of vertical trash rack pieces 6, which are equidistantly arranged in the horizontal direction. The movable trash rack 5 includes a plurality of transverse trash rack pieces 7, which are equidistantly arranged in the vertical direction. The plurality of transverse trash rack pieces 7 contact the plurality of vertical trash rack pieces 6 to form a mesh trash rack. The movable trash rack 5 moves away from the fixed trash rack 4 to make the movable trash rack 5 contact with the fixed trash rack 4. A dredging space is formed between the fixed trash racks 4. During interception, the mobile trash rack 5 contacts the fixed trash rack 4 to form a grid-type trash rack, and the trash is intercepted by the grid-type trash rack. When the trash rack 1 is blocked, the mobile trash rack 5 moves away from the fixed trash rack 4, so that the mobile trash rack 5 is separated from the fixed trash rack 4, thereby dividing the grid-type trash rack into a transverse trash rack and a longitudinal trash rack, and then the trash stuck on the grid-type trash rack falls off, realizing the rapid dredging of the trash rack, and part of the trash will fall between the fixed trash rack 4 and the mobile trash rack 5; it also includes a gantry mechanism and a cleaning mechanism, the gantry mechanism includes a gantry frame 2 and a movable crossbeam 3, the gantry frame 2 is installed just above the trash rack 1, the movable crossbeam 3 is movably installed on the gantry frame 2, and the moving direction of the movable crossbeam 3 is the same as that of the fixed trash rack 4. The moving direction of the mobile trash rack 5 is the same. The trash cleaning mechanism includes a traveling seat 8, an electric hoist 9 and a trash cleaning grab 10. The traveling seat 8 is slidably installed on the moving crossbeam 3. The moving direction of the traveling seat 8 is perpendicular to the moving direction of the moving crossbeam 3. The electric hoist 9 is installed at the bottom of the traveling seat 8. The lifting rope of the electric hoist 9 is connected to the trash cleaning grab 10. When cleaning, the trash cleaning grab 10 is lowered by the electric hoist 9, and the dirt intercepted by the trash rack 1 is grabbed by the dirt cleaning grab 10. Then the electric hoist 9 drives the dirt cleaning grab 10 to move up, and the movement of the moving crossbeam 3 and the traveling seat 8 is coordinated to place the grabbed dirt in the designated position. The traveling seat 8 moves on the moving crossbeam 3 to change the working position of the trash cleaning grab 10, that is, it moves in a direction perpendicular to the water flow, thereby intercepting The dirt in front of the trash rack 1 is gradually cleaned up. After the cleaning is completed, it is determined whether the trash rack 1 needs to be dredged according to the blockage condition of the trash rack 1. When the trash rack 1 is seriously blocked and needs to be dredged, the mobile trash rack 5 moves away from the fixed trash rack 4. Since the dirt in front of the trash rack 1 has been cleaned up, at this time, the mobile trash rack 5 is briefly separated from the fixed trash rack 4 for dredging without affecting the interception. Therefore, there is no need to stop the machine for dredging. After the trash rack 1 is quickly dredged, some dirt will fall between the mobile trash rack 5 and the fixed trash rack 4. The walking seat 8 moves to drive the cleaning grab 10 to move to the top of the dredging space, and the dirt in the dredging space is cleaned up by the cleaning grab 10. Finally, the mobile trash rack 5 moves close to the fixed trash rack 4 and is reset.

[0028] Furthermore, if Figures 1 to 3 As shown, the fixed trash rack 4 also includes a rectangular fixed frame 11, the vertical grille piece 6 is located in the rectangular fixed frame 11, and the top and bottom of the vertical grille piece 6 are fixedly connected to the rectangular fixed frame 11, the movable trash rack 5 also includes a rectangular movable frame 12, the transverse grille piece 7 is located in the rectangular movable frame 12, and the left and right ends of the transverse grille piece 7 are fixedly connected to the rectangular movable frame 12, and hydraulic cylinders 13 are provided on both sides of the top of the rectangular fixed frame 11, and the cylinder body of the hydraulic cylinder 13 is fixedly installed on the rectangular fixed frame 11, and the telescopic shaft of the hydraulic cylinder 13 is connected to the rectangular movable frame 12, and the movable trash rack 5 is driven to move away from or close to the fixed trash rack 4 by the telescopic movement of the hydraulic cylinder 13. The hydraulic cylinder 13 has a strong acting force to meet the power requirements for the movement of the movable trash rack 5.

[0029] Furthermore, if Figure 1 and Figure 6As shown, the garbage grab bucket 10 includes a fixed bucket frame 14, a movable grab beam 15 and a mounting beam 16. The mounting beam 16 is located between the fixed bucket frame 14 and the movable grab beam 15. The fixed bucket frame 14 is fixedly connected to the mounting beam 16 through a rib plate 17. The movable grab beam 15 is hinged on the mounting beam 16. The bottom of the movable grab beam 16 is equidistantly fixed with a plurality of arc-shaped grab teeth 18 along its own length direction. A pushing hydraulic cylinder 19 is provided on the top of the fixed bucket frame 14. The cylinder body of the pushing hydraulic cylinder 19 is hinged on the fixed bucket frame 14. The telescopic shaft of the pushing hydraulic cylinder 19 is hinged on the movable grab beam 15. A plurality of dredging tooth plates 20 are fixed on one end of the fixed bucket frame 14 away from the movable grab beam 15. The plurality of dredging tooth plates 20 are equidistantly arranged along the length direction of the fixed bucket frame 14. The dredging tooth plates 20 are used to extend into between two adjacent vertical fence plates 6 for cleaning. The movable grab beam 1 is driven by the pushing hydraulic cylinder 19. 5 deflects, the movable grab beam 15 drives the arc-shaped grab teeth 18 to deflect close to or away from the fixed bucket frame 14, realizes the grabbing and releasing action, and realizes the cleaning of dirt. Since the fixed trash rack 4 is located in front of the mobile trash rack 5, it will directly intercept the dirt. Therefore, the blockage of the fixed trash rack 4 is equivalent to that of the mobile trash rack 5, which is more serious. When the dirt in front of the trash rack 1 is cleaned by the cleaning grab bucket 10, when the cleaning grab bucket 10 is lowered to the front of the trash rack 1, the movable cross beam 3 moves, driving the cleaning grab bucket 10 to move close to the trash rack 1, so that the dredging tooth plate 20 of the cleaning grab bucket 10 is inserted between the vertical grille pieces 6. As the cleaning grab bucket 10 moves downward, the blockage stuck between the mobile trash rack 5 is pushed to the bottom, completing the cleaning of the mobile trash rack 5, so that each time the dirt in front of the trash rack 1 is cleaned, the trash rack 1 can be cleaned, thereby reducing the blockage frequency of the trash rack 1. Preferably, a push bucket 21 is fixed to one side of the fixed bucket frame 14, and a space is formed inwardly at one end of the push bucket 21 away from the fixed bucket frame 14. Since there is less dirt falling between the dredging spaces, the cleaning grab bucket 10 is first lowered to one end of the dredging space, and then the walking seat 8 moves on the moving beam 3 to move the cleaning grab bucket 10 from one end of the dredging space to the other end. The dirt is gathered together by the push bucket 21, and finally the dirt is grabbed out by the cleaning grab bucket 10, which greatly improves the dirt treatment efficiency in the dredging space.

[0030] Furthermore, if Figure 4 and Figure 5 As shown, a T-shaped track 22 is fixed on the gantry 2, and a T-shaped slot is provided at the bottom of the movable beam 3 along the length direction of the T-shaped slide rail 22. The T-shaped track 22 is slidably fitted in the T-shaped slot. A motor 23 is fixed on the movable beam 3, and a gear 24 is connected to the output shaft of the motor 23. A rack 25 is fixed on the gantry 2, and the rack 25 is parallel to the T-shaped track 22. The gear 24 engages with the rack 25. The motor 23 drives the gear 24 to move, and the movable beam 3 is driven to move by the engagement of the gear 25 with the rack 25. The cooperation of the T-shaped slot and the T-shaped track 22 makes the movement of the movable beam 3 more stable.

[0031] Furthermore, if Figures 1 to 7 As shown, two mechanical limit blocks 26 are fixed on the gantry 2 at intervals, and the moving crossbeam 3 is located between the two mechanical limit blocks 26. When the moving crossbeam 3 contacts one of the mechanical limit blocks 26, the cleaning grab 10 is located between the fixed trash rack 4 and the moving trash rack 5. When the moving crossbeam 3 contacts the other mechanical limit block 26, the cleaning grab 10 is located outside the fixed trash rack 4. A stop button 27 is penetrated at one end of the mechanical limit block 26 close to the moving crossbeam 3. An inner cavity is provided in the mechanical limit block 26, and a pressure sensor 28 is installed in the inner cavity. The pressure axis of the pressure sensor 28 is located on the moving path of the stop button 27. A pressure plate 29 is fixed at one end of the stop button 27 close to the pressure sensor 28. A spring 30 is sleeved, and the two ends of the spring 30 are respectively connected to the pressure plate 29 and the mechanical limit block 26. The position of the moving beam 3 is positioned by the two mechanical limit blocks 26. Before the moving beam 3 contacts the mechanical limit block 26, it will first contact the stop button 27 to move, so that the stop button 27 stretches the spring 30 to move close to the pressure sensor 28, and the motor 23 is disconnected by the pressure signal of the pressure sensor 28. When the moving beam 3 is based on the mechanical limit block 26, the pressure plate 29 contacts the pressure shaft of the pressure sensor 28, so that the pressure sensor 28 generates a signal, which is fed back to the controller through this signal. The controller disconnects the motor 23, thereby positioning the position of the cleaning grab 10, so that the cleaning grab 10 is switched between the front of the trash rack 1 and the dredging space.

[0032] Furthermore, if Figures 1 to 8As shown, both ends of the moving crossbeam 3 are provided with rectangular grooves 31 along the length direction thereof, and a walking wheel 32 is provided in the rectangular groove 31, and the wheel axle of the walking wheel 32 is rotatably connected to the walking seat 8, and a walking motor is provided in the walking seat 8, and the output shaft of the walking motor is connected to the wheel axle, and a positioning mechanism is provided on the top of the walking seat 8, and a plurality of positioning holes 33 are equidistantly provided at the bottom of the moving crossbeam 3 along the length direction thereof, and the positioning mechanism includes a latch 34, and a mounting groove 35 is provided on the top of the walking seat 8, and an electromagnet 36 is installed in the mounting groove 35, and a reset spring 37 is provided in the mounting groove 35, and one end of the latch 34 is slidably adapted to the mounting In the groove 35, the two ends of the return spring 37 are respectively connected to the walking seat 8 and the pin 34. A permanent magnet 38 is fixed to one end of the pin 34 close to the electromagnet 36. The electromagnet 36 is energized to generate a magnetic pole with the same magnetic property as the permanent magnet 38. When the pin 34 is inserted into one of the positioning holes 33, the dredging tooth plate 20 extends into between two adjacent vertical fence pieces 6 for cleaning. By setting the positioning mechanism, it is ensured that the lowering position of the dredging tooth plate 20 of the cleaning grab 10 corresponds to the vertical fence piece 6 of the fixed trash rack 4, so that the dredging tooth plate 20 can be inserted between two adjacent vertical fence pieces 6. Specifically, the electromagnet 36 is energized, and the electric The magnet 36 repels the permanent magnet 38, and the permanent magnet 38 stretches the reset spring 37 to drive the latch 34 to move, so that the latch 34 extends out of the mounting slot 35, so that the latch 34 abuts against the bottom of the moving crossbeam 3, and the travel seat 8 moves normally. When a positioning hole 33 is located on the moving path of the latch 34, the latch 34 is inserted into the positioning hole 33, thereby locking the travel seat 8. At this time, the travel motor stops, and the positioning of the cleaning grab 10 is completed. The cleaning grab 10 is lowered so that the cleaning grab 10 is in front of the trash rack 1, and then the moving crossbeam 3 drives the cleaning grab 10 to move close to the trash rack 1, so that the cleaning grab 10 is unblocked. The tooth plate 20 is inserted between the vertical fence pieces 6, and then the garbage grab 10 is lowered to push the blockage to the bottom and drop it, and then the garbage is grabbed by the garbage grab 10. Then, the electromagnet 36 is powered off to allow the walking seat 8 to move normally. When approaching the next positioning hole 33, the electromagnet 36 is powered on again to insert the pin 34 into the next positioning hole 33 to complete the positioning of the garbage grab 10. This is repeated so that the pin 34 fits into the multiple positioning holes 33 one by one, so that when the garbage grab 10 is working, the dredging tooth plate 20 can be inserted into the space between the multiple vertical fence pieces 6 to complete the grabbing of garbage and the cleaning of the garbage rack 1.

Claims

1. A trash rack device for cleaning sewage in a hydropower station, comprising a trash rack (1), wherein the trash rack (1) is installed at the water inlet of the hydropower station, and is characterized in that: The trash rack (1) comprises a fixed trash rack (4) and a movable trash rack (5), wherein the fixed trash rack (4) is fixedly installed at the water inlet of the hydropower station, the movable trash rack (5) is slidably connected to the fixed trash rack (4), and the movable trash rack (5) moves close to or away from the fixed trash rack (4), the fixed trash rack (4) comprises a plurality of vertical trash rack pieces (6), and the plurality of vertical trash rack pieces (6) are arranged equidistantly along the horizontal direction, the movable trash rack (5) comprises a plurality of transverse trash rack pieces (7), and the plurality of transverse trash rack pieces (7) are arranged equidistantly along the vertical direction, and the plurality of transverse trash rack pieces (7) contact the plurality of vertical trash rack pieces (6) to form a grid-type trash rack, and the movable trash rack (5) moves away from the fixed trash rack (4) to form a dredging space between the movable trash rack (5) and the fixed trash rack (4); The utility model also comprises a gantry mechanism and a trash cleaning mechanism, wherein the gantry mechanism comprises a gantry frame (2) and a movable crossbeam (3), wherein the gantry frame (2) is installed directly above the trash rack (1), and the movable crossbeam (3) is movably installed on the gantry frame (2), and the moving direction of the movable crossbeam (3) is the same as the moving direction of the movable trash rack (5); the trash cleaning mechanism comprises a traveling seat (8), an electric hoist (9) and a trash cleaning grab (10), wherein the traveling seat (8) is slidably installed on the movable crossbeam (3), and the moving direction of the traveling seat (8) is perpendicular to the moving direction of the movable crossbeam (3), and the electric hoist (9) is installed at the bottom of the traveling seat (8), and the lifting rope of the electric hoist (9) is connected to the trash cleaning grab (10).

2. The anti-blocking trash rack device for cleaning pollution in a hydropower station according to claim 1, characterized in that: The fixed trash rack (4) further comprises a rectangular fixed frame (11), the vertical trash rack piece (6) is located in the rectangular fixed frame (11), and the top and bottom of the vertical trash rack piece (6) are fixedly connected to the rectangular fixed frame (11).

3. The anti-blocking trash rack device for cleaning pollution in a hydropower station according to claim 2, characterized in that: The movable trash rack (5) further comprises a rectangular movable frame (12), the transverse trash rack piece (7) being located in the rectangular movable frame (12), and the left and right ends of the transverse trash rack piece (7) being fixedly connected to the rectangular movable frame (12), and hydraulic cylinders (13) being arranged on both sides of the top of the rectangular fixed frame (11), the cylinder body of the hydraulic cylinder (13) being fixedly mounted on the rectangular fixed frame (11), and the telescopic shaft of the hydraulic cylinder (13) being connected to the rectangular movable frame (12).

4. The anti-blocking trash rack device for cleaning pollution in a hydropower station according to claim 3, characterized in that: The garbage cleaning grab bucket (10) comprises a fixed bucket frame (14), a movable grab beam (15) and a mounting beam (16); the mounting beam (16) is located between the fixed bucket frame (14) and the movable grab beam (15); the fixed bucket frame (14) is fixedly connected to the mounting beam (16) via a rib plate (17); the movable grab beam (15) is hinged on the mounting beam (16); a plurality of arc-shaped grab teeth (18) are fixed at equal distances on the bottom of the movable grab beam (15) along its length direction; and a plurality of arc-shaped grab teeth (18) are provided on the top of the fixed bucket frame (14). A pushing hydraulic cylinder (19) is provided, the cylinder body of the pushing hydraulic cylinder (19) is hinged on the fixed bucket frame (14), the telescopic shaft of the pushing hydraulic cylinder (19) is hinged on the movable grab beam (15), a plurality of dredging tooth plates (20) are fixed to one end of the fixed bucket frame (14) away from the movable grab beam (15), the plurality of dredging tooth plates (20) are arranged at equal intervals along the length direction of the fixed bucket frame (14), and the dredging tooth plates (20) are used to extend into between two adjacent vertical fence plates (6) for cleaning.

5. The anti-blocking trash rack device for cleaning pollution in a hydropower station according to claim 4, characterized in that: A push bucket (21) is fixed on one side of the fixed bucket frame (14), and one end of the push bucket (21) away from the fixed bucket frame (14) is concave to form a space.

6. The anti-blocking trash rack device for cleaning pollution in a hydropower station according to claim 1, characterized in that: A T-shaped rail (22) is fixed on the gantry (2); a T-shaped slide groove is provided at the bottom of the movable crossbeam (3) along the length direction of the T-shaped slide rail (22); the T-shaped rail (22) is slidably fitted in the T-shaped slide groove; a motor (23) is fixed on the movable crossbeam (3); an output shaft of the motor (23) is connected to a gear (24); a rack (25) is fixed on the gantry (2); the rack (25) is parallel to the T-shaped rail (22), and the gear (24) meshes with the rack (25).

7. The anti-blocking trash rack device for cleaning pollution in a hydropower station according to claim 6, characterized in that: Two mechanical limit blocks (26) are fixed on the gantry (2) at intervals, and the movable crossbeam (3) is located between the two mechanical limit blocks (26). When the movable crossbeam (3) contacts one of the mechanical limit blocks (26), the garbage grab (10) is located between the fixed garbage rack (4) and the movable garbage rack (5). When the movable crossbeam (3) contacts the other mechanical limit block (26), the garbage grab (10) is located outside the fixed garbage rack (4).

8. The anti-blocking trash rack device for cleaning pollution in a hydropower station according to claim 7, characterized in that: A stop button (27) is provided at one end of the mechanical limit block (26) close to the movable cross beam (3); an inner cavity is provided in the mechanical limit block (26); a pressure sensor (28) is installed in the inner cavity; a pressure axis of the pressure sensor (28) is located on the moving path of the stop button (27); a pressure plate (29) is fixed to one end of the stop button (27) close to the pressure sensor (28); a spring (30) is sleeved on the stop button (27); two ends of the spring (30) are respectively connected to the pressure plate (29) and the mechanical limit block (26).

9. The anti-blocking trash rack device for cleaning pollution in a hydropower station according to claim 4, characterized in that: Both ends of the movable crossbeam (3) are provided with rectangular grooves (31) along the length direction thereof, and a walking wheel (32) is provided in the rectangular groove (31), and the wheel axle of the walking wheel (32) is rotatably connected to the walking seat (8), and a walking motor is provided in the walking seat (8), and the output shaft of the walking motor is connected to the wheel axle.

10. The anti-blocking trash rack device for cleaning pollution in a hydropower station according to claim 9, characterized in that: A positioning mechanism is provided on the top of the travel seat (8), and a plurality of positioning holes (33) are equidistantly provided on the bottom of the movable crossbeam (3) along its length direction. The positioning mechanism includes a latch (34), and a mounting groove (35) is provided on the top of the travel seat (8). An electromagnet (36) is installed in the mounting groove (35), and a return spring (37) is provided in the mounting groove (35). One end of the latch (34) is slidably adapted in the mounting groove (35), and the two ends of the return spring (37) are respectively connected to the travel seat (8) and the latch (34). A permanent magnet (38) is fixed to one end of the latch (34) close to the electromagnet (36). When the electromagnet (36) is energized, a magnetic pole having the same magnetic property as that of the permanent magnet (38) is generated. When the latch (34) is inserted into one of the positioning holes (33), the dredging tooth plate (20) extends into between two adjacent vertical fence plates (6) for cleaning.

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