A nuclear power plant cold source filtering and interception device

Abstract

This application discloses a cold source filtration and interception device for nuclear power plants, relating to the field of cold source pollution control in nuclear power plants. The device includes an offshore guiding net, a pollution interception net, a tensioned net with pleats, and a bottom-covering net. These nets are all installed on the headworks of the nuclear power plant's intake. They are arranged sequentially from farthest to near the nuclear power plant on the headworks. The bottom-covering net includes an mounting platform, a net body, and anchor blocks. The mounting platform is installed on the headworks, the net body is installed on the mounting platform, and the anchor blocks are installed on the net body. The anchor blocks are detachably installed at the bottom of the headworks. A winding roller is rotatably mounted on the mounting platform, and a guide roller is rotatably mounted on the anchor blocks. The net body is connected end-to-end and nested between the winding roller and the guide roller. A cleaning mechanism is provided on the guide roller, and this cleaning mechanism abuts against the side of the net body facing away from the nuclear power plant. This application has the effect of reducing the probability of the net body becoming clogged.

Description

Technical Field

[0001] This application relates to the field of cold source containment in nuclear power plants, and in particular to a cold source filtration and containment device for nuclear power plants. Background Technology

[0002] Nuclear power generation uses the heat energy released from nuclear fission to heat water and generate steam, which then drives a generator to produce electricity. During nuclear power generation, after the steam drives the generator, it needs to be cooled back into water before being fed back into the reactor, a cycle that repeats. Steam cooling requires a large amount of seawater as a cooling source. When seawater is extracted, marine life and debris are also extracted along with it, leading to a significant intrusion of contaminants. This reduces the amount of cooling water, affecting the cooling effect, causing the reactor to overheat, and potentially resulting in reduced power output or a shutdown. Therefore, existing cooling source providers typically have interception devices to block marine life and debris from the seawater.

[0003] Existing interception devices typically consist of multiple sets of different nets. By installing these nets at the cold source water intake, they intercept marine life and marine debris in the seawater. After the nets intercept the marine life and marine debris, some of the marine life and marine debris will adhere to the nets, thus affecting the entry of seawater. Summary of the Invention

[0004] In order to reduce the probability of the mesh being blocked, this application provides a cold source filtering and interception device for nuclear power plants.

[0005] The nuclear power plant cold source filtering and interception device provided in this application adopts the following technical solution: A cold source filtration and interception device for a nuclear power plant includes an offshore guiding net, a debris-blocking net, a tensioned net with retaining loops, and a bottom net. The offshore guiding net, debris-blocking net, tensioned net with retaining loops, and bottom net are all installed on the breakwater abutment of the nuclear power plant's intake. The offshore guiding net, debris-blocking net, tensioned net with retaining loops, and bottom net are arranged sequentially from farthest to near the nuclear power plant on the breakwater abutment. The bottom net includes an mounting platform, a net body, and anchor blocks. The mounting platform is installed on the breakwater abutment, the net body is installed on the mounting platform, and the anchor blocks are installed on the net body. The anchor blocks are detachably installed on the breakwater abutment. At the bottom of the pier, a take-up roller is rotatably mounted on the mounting platform, and a guide roller is rotatably mounted on the anchor block. The mesh body is connected end to end and sleeved between the take-up roller and the guide roller. A cleaning mechanism is provided on the guide roller. The cleaning mechanism includes a mounting plate, a clamping rod, and bristles. The mounting plate is fixed to the guide roller, and the clamping rod is slidably mounted on the mounting plate. The clamping rod slides towards or away from the take-up roller. The mounting plate is fixed to the anchor block, and the bristles are sleeved and mounted on the clamping rod, with the bristles abutting against the side of the mesh body facing away from the nuclear power plant.

[0006] By adopting the above technical solution, some marine organisms and marine debris are guided away from the cold source intake of the nuclear power plant by an offshore guiding net. Then, a series of in-depth interception is carried out using a debris barrier net, a pleated net, and a bottom net, thereby reducing the probability of marine organisms and marine debris entering the nuclear power plant. The nets are connected end to end to form a ring. By being installed between the take-up roller and the guide roller, the nets form a double-layer structure after installation. This allows the second layer of nets to continue filtering and intercepting when the single-layer net is damaged, improving the interception efficiency. At the same time, the nets can be driven with the rotation of the take-up roller. The transmission of the nets causes the brush to scrub the surface of the nets, removing the marine organisms or marine debris adhering to the nets, thereby reducing the probability of the interception nets being blocked. The sliding of the clamping rod clamps the nets onto the take-up roller. At this time, the rotation of the take-up roller can roll up the nets, so that the take-up roller can either drive the nets without winding or drive the nets to wind up, which facilitates the winding, inspection, or replacement of the nets.

[0007] Preferably, a disassembly assembly is provided between the anchor block and the embankment abutment. The disassembly assembly includes a fixing platform, an installation groove, a fixing slot, and a fixing block. The fixing platform is installed on the embankment abutment, the installation groove is formed on the fixing platform, the fixing slot is formed on the side wall of the installation groove on the fixing platform, and the fixing block is slidably disposed on the anchor block. The anchor block slides down and engages with the installation groove. When the anchor block is engaged with the installation groove, the fixing block engages with the fixing slot. By adopting the above technical solution, the net body is positioned by snapping the anchor block into the mounting groove of the fixed platform, and then the anchor block is reinforced by sliding the fixed block into the fixed slot. This reduces the probability of the anchor block being displaced by the impact of seawater and reduces the probability of marine life or marine debris passing through the bottom of the net body.

[0008] Preferably, a drive rod is installed on the embankment abutment, and a disassembly block is fixed at one end of the drive rod. The disassembly block is slidably disposed at the bottom of the fixing slot, and the drive rod drives the disassembly block to slide and seal the fixing slot. By adopting the above technical solution, the setting of the drive rod can facilitate the driving of the disassembly block. By driving the disassembly block, when it is necessary to disassemble the net body, the fixed card block can be driven to disengage from the fixed card slot without entering the seabed.

[0009] Preferably, a return spring is provided between the disassembly block and the fixing platform, the return spring driving the disassembly block to block the fixing slot, and a drive spring is provided between the fixing block and the anchor block, the drive spring driving the fixing block to slide out of the anchor block, the force of the drive spring being greater than that of the return spring. By adopting the above technical solution, the reset spring can drive the disassembly block to block the fixed slot when the fixed slot is not in use, thereby reducing the entry of debris or marine organisms into the fixed slot and blocking it. The elastic force of the drive spring is greater than that of the reset spring, which can drive the fixed slot block to push the disassembly block through the drive spring, so that the fixed slot block can be properly engaged in the fixed slot.

[0010] Preferably, the embankment abutment is equipped with receiving hoppers at the bottom of the debris-blocking net, the tensioned net, and the bottom-covering net, facing away from the nuclear power plant. By adopting the above technical solutions, the receiving bucket can be used to receive marine organisms and marine debris intercepted by debris-blocking nets, grate nets, and bottom nets.

[0011] Preferably, a discharge pipe is provided at the bottom of the receiving hopper, the discharge pipe is connected and communicates with all the receiving hoppers, and one end of the discharge pipe extends to the outside of the embankment abutment. By adopting the above technical solution, the installation of the discharge pipe can discharge the intercepted marine organisms and marine debris outside the breakwater pier, reducing the probability of the intercepted marine organisms and marine debris clogging the cold source inlet.

[0012] Preferably, a sorting platform is provided outside the embankment abutment, and a sorting pool is provided on the sorting platform, with a discharge pipe connected to and communicating with the sorting pool. By adopting the above technical solutions, the setting of sorting pools can facilitate the classification of marine life and marine debris, thereby enabling marine life to return to the sea and cleaning up marine debris, reducing marine pollution to the ocean.

[0013] Preferably, a baffle is slidably installed at the connection between the receiving hopper and the discharge pipe. The baffle opens or closes the discharge pipe by sliding. After the debris-blocking net, the tension net, and the bottom net are installed, they drive the baffle to open the discharge pipe. By adopting the above technical solutions, the baffle can close the discharge pipe when the intercepting net, the slack net, and the bottom net are installed, thereby reducing the workload of the sorting pool when there is no interception.

[0014] Preferably, the netting includes a barrier net and a net bag. The barrier net is vertically installed between the embankment abutments, and mounting holes are provided in the barrier net. The net bag is installed in the mounting holes, and a discharge port is provided at the end of the net bag away from the barrier net. An opening and closing mechanism is provided at the discharge port to open or close the discharge port. A floating platform is provided at the end of the embankment abutment away from the net bag and the end of the net bag away from the barrier net. A suction robot is slidably mounted on the floating platform. The suction robot is equipped with a suction pipe and a discharge pipe. The suction pipe is detachably connected to the discharge port. When the suction pipe is connected to the discharge port, the opening and closing mechanism opens the discharge port, and the discharge pipe is connected to the discharge pipe. By adopting the above technical solution, the suction robot can remove marine organisms and marine debris intercepted by the sac-like net, thereby reducing the probability of the sac-like net becoming clogged and enabling timely cleaning of marine debris captured by the net.

[0015] Preferably, an oil boom is installed between the offshore guide net and the debris barrier net.

[0016] By adopting the above technical solutions, oil booms can intercept oil spills that cannot be intercepted by offshore guiding nets, debris barriers, grate nets, and bottom nets, reducing the probability of oil spills on the sea surface entering nuclear power units.

[0017] In summary, this application includes at least one of the following beneficial technical effects: 1. By guiding marine life and debris away from the cold source intake of the nuclear power plant through offshore guide nets, a series of in-depth interception methods, including debris-blocking nets, pleated nets, and bottom nets, are used to reduce the probability of marine life and debris entering the nuclear power plant. The nets are connected end to end to form a loop and are installed between the take-up roller and the guide roller, forming a double-layer structure. This allows the second layer to continue filtering and intercepting when the first layer is damaged, improving interception efficiency. At the same time, the net can be driven with the rotation of the take-up roller, and the drive of the net causes the brush to scrub the surface of the net, removing marine life or debris adhering to the net, thereby reducing the probability of the interception net being blocked. 2. The net is positioned by snapping the anchor block into the mounting groove of the fixed platform, and then the anchor block is reinforced by sliding the fixed block into the fixed slot. This reduces the probability of the anchor block being displaced by the impact of seawater and reduces the probability of marine life or marine debris passing through the bottom of the net. 3. The receiving bucket is designed to receive marine life and marine debris intercepted by the intercepting net, the grate net, and the bottom net; the discharge pipe is designed to discharge the intercepted marine life and marine debris outside the breakwater pier, reducing the probability of the intercepted marine life and marine debris clogging the cold source inlet. 4. The establishment of sorting pools facilitates the classification of marine life and marine debris, enabling marine life to return to the sea and removing marine debris, thereby reducing marine pollution. 5. The suction robot removes marine life and debris trapped by the gillnet, thereby reducing the probability of the gillnet getting clogged and enabling timely cleanup of marine debris captured by the gillnet. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the bottom mesh structure in an embodiment of this application; Figure 3 This is a schematic diagram of the installation of the bottom mesh structure according to an embodiment of this application; Figure 4 This is a schematic diagram of the connection structure between the discharge port and the extraction pipe in an embodiment of this application; Attached reference numerals: 0. Dikehead pier; 1. Offshore guide net; 2. Pollution barrier net; 3. Tensioned net with sack; 31. Barrier net; 32. Net bag; 4. Bottom net; 41. Mounting platform; 42. Net body; 43. Anchor block; 5. Groove; 6. Oil boom; 7. Rewinding roller; 8. Guide roller; 9. Cleaning mechanism; 91. Mounting plate; 92. Clamping rod; 93. Brush; 10. Dike divider; 12. Assembly / disassembly assembly; 121. Fixing platform; 122. Mounting groove; 123. 124. Fixed slot; 13. Fixed block; 14. Drive rod; 15. Disassembly block; 16. Return spring; 17. Drive spring; 18. Receiving hopper; 19. Discharge pipe; 20. Baffle; 21. Sorting platform; 22. Sorting pool; 23. Mounting hole; 24. Discharge port; 25. Opening and closing mechanism; 26. Opening and closing plate; 27. Torsion spring; 28. Floating platform; 29. ​​Suction robot; 20. Suction pipe; 20. Discharge pipe; 21. Opening ring block. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0020] This application discloses a cold source filtering and interception device for a nuclear power plant, referring to... Figure 1The system includes an offshore guiding net 1, a debris barrier net 2, a mesh net 3, and a bottom net 4. All four are installed on the abutment 0 at the intake of the nuclear power plant. In this embodiment, the abutment 0 is a dam structure used for diversion at the intake of the nuclear power plant, consisting of two abutment 0s. The debris barrier net 2, mesh net 3, and bottom net 4 are separated between the two abutment 0s. Grooves 5 are provided on the abutment 0 corresponding to the installation of the debris barrier net 2, mesh net 3, and bottom net 4 to reduce the probability of marine life and marine debris passing through the side walls of the abutment 0 and the debris barrier net 2, mesh net 3, and bottom net 4 after installation. The slack net 3 and the catch net 4 are laid out sequentially from far to near on the breakwater pier 0, facing the nuclear power plant. The offshore guide net 1 is set up in the offshore area to intercept marine organisms such as seaweed, ensuring the unobstructed water intake of the nuclear power unit. The debris barrier net 2 is used to intercept marine organisms, floating objects and other debris to prevent them from clogging the water intake and to ensure a stable supply of cooling water. In this embodiment, the debris barrier net 2 is a planar debris barrier net 2. The slack net 3 is mainly used to intercept marine organisms and floating objects to prevent them from clogging the water intake and to ensure the safe operation of the cooling system. It also has the function of capturing marine organisms and marine debris. The catch net 4 is used to intercept marine organisms, floating objects and other debris, and is also the bottom protection of the entire interception system. When other interception nets in front of the catch net 4 are damaged, the catch net 4 can perform bottom interception.

[0021] Reference Figure 1 The guide net extends approximately 440m from the pier at the head of the dike. The main body of the guide net is made of nylon mesh with a mesh size of 50mm x 50mm, a depth of 1m above water and 2m underwater, and is secured by buoys and anchor blocks. The guide net is designed as a segmented structure, with each unit mesh measuring 50m x 3m. The mesh panels are bound together using ultra-high molecular weight polyethylene (UHMWPE) fiber rope. The guide net can be replaced periodically based on wear. Vertical reinforcing ribs are installed at 10m intervals, using Φ20mm UHMWPE cable for the vertical reinforcing ribs and edge sealing mesh. Horizontal reinforcing ribs are installed 1m from the top edge sealing mesh, using Φ12mm UHMWPE cable. The mesh panels are made of high-strength nylon, while the mesh and reinforcing ribs are made of UHMWPE fiber material.

[0022] Reference Figure 1An oil boom 6 is installed between the offshore guiding net 1 and the debris barrier net 2. The oil boom 6CN3 is a solid, float-type, flame-retardant rubber oil boom, black in color, approximately 330m long; its total height is 900mm, freeboard is 310mm, and draft is 470mm. It is installed in sections. The main body of the oil boom 6 is made of high-strength, oil-resistant, weather-resistant, wear-resistant, corrosion-resistant, and seawater-resistant neoprene rubber cloth through vulcanization. This material is flame-retardant and resistant to chemical corrosion. The internal floats of the oil boom 6 are cylindrical, with built-in polystyrene foam. After use, the oil boom 6 must be rinsed with detergent to remove oil stains and prevent corrosion. After drying, it should be stored in a cool place, away from strong acids and alkalis. The integrity of the connectors and floats should be checked regularly. The oil boom 6 can intercept oil spills that cannot be intercepted by the offshore guiding net 1, debris barrier net 2, sheet net 3, and bottom net 4, reducing the probability of oil spills from the sea surface entering the nuclear power unit.

[0023] Reference Figure 1 The debris barrier net 2 is made of ultra-high molecular weight polyethylene (UHMWPE). The netting is designed as a segmented structure, with each unit netting being 20m long, based on the total length of the guide net. These unit netting pieces can be replaced periodically according to wear. The interception layer has a mesh size of 100mm x 100mm and a wire diameter of φ5mm, forming a knotted mesh. Both horizontal and vertical reinforcing ribs are made of 22mm diameter UHMWPE braided rope, spaced 2.5m apart. The main cable of the debris barrier net 2 is fixed to the water surface via floats. Thirty polyethylene floats are installed in each of the two open channel sections, spaced 3m apart; the exact number can be adjusted according to actual needs.

[0024] Reference Figure 1The bottom net 4 includes an installation platform 41, a net body 42, and anchor blocks 43. The installation platform 41 is fixedly installed in the groove 5 of the dike abutment 0 by expansion bolts. The installation position of the installation platform 41 is above sea level. The net body 42 is installed on the installation platform 41, and the anchor blocks 43 are installed on the net body 42. The anchor blocks 43 are detachably installed at the bottom of the dike abutment 0. A winding roller 7 is rotatably installed on the installation platform 41. The winding roller 7 is driven by a motor installed on the installation platform 41. A guide roller 8 is rotatably installed on the anchor blocks 43. The beginning and end of the net body 42 are connected to each other. A ring-shaped net 42 is fitted between the take-up roller 7 and the guide roller 8. Anchor block 43 acts as a counterweight, carrying the net 42 as it sinks in the seawater at the intake. When anchor block 43 reaches the bottom of the intake, it is installed on the dike abutment 0. A cleaning mechanism 9 is installed on the guide roller 8. The cleaning mechanism 9 includes a mounting plate 91, a clamping rod 92, and bristles 93. The mounting plate 91 is fixed to the guide roller 8, and the clamping rod 92 is slidably mounted on the mounting plate 91. The clamping rod 92 slides towards or away from the take-up roller 7. The mounting plate 91 is fixed to the anchor block 43, and the brush bristles are sleeved and installed on the clamping rod 92. The brush bristles 93 abut against the side of the net body 42 facing outwards from the nuclear power plant. Through the rotation of the take-up roller 7, the net body 42 is driven to move between the guide roller 8 and the take-up roller 7. The brush 92 cleans the surface of the moving net body 42, thereby removing debris adhering to the surface of the net body 42 and reducing the probability of the net body 42 being blocked. The ring-shaped net body 42 itself also forms a double-layer net body 42 structure, so that when the single-layer net body 42 is damaged, the second layer net body 42 can continue to repair it. To further improve the filtering and interception efficiency, in this embodiment, when it is necessary to clean the net body 42, the transmission direction of the net body 42 is from the take-up roller 7 to the guide roller 8, thereby reducing the amount of debris on the net body 42 being carried to the side of the net body 42 facing the nuclear power plant; the sliding of the clamping rod 11 clamps the net body 42 on the take-up roller 7. At this time, the rotation of the take-up roller 7 can rewind the net body 42, thereby realizing that the take-up roller 7 can either simply drive the net body 42 without rewinding, or drive the net body 42 to rewind, which is convenient for the rewinding, inspection or replacement of the net body 42.

[0025] Reference Figure 1 , Figure 2 and Figure 3A disassembly assembly 12 is provided between the anchor block 43 and the embankment abutment 0. One set of disassembly assemblies 12 is provided at each end of the anchor block 43 along its length and between the two embankment abutments 0. The disassembly assembly 12 includes a fixing platform 121, an installation groove 122, a fixing slot 123, and a fixing block 124. The fixing platform 121 is installed in the groove 5 of the embankment abutment 0. The installation groove 122 is formed on the fixing platform 121. The fixing slot 123 is formed on the side wall of the installation groove 122 and on the fixing platform 121. The fixing block 124 is slidably disposed on the anchor block 43. The anchor block 43 slides down and engages with the installation groove 122. When the anchor block 43… When the anchor block 43 is engaged in the mounting groove 122, the fixing block 124 is engaged in the fixing groove 123. The anchor block 43 is positioned by engaging the anchor block 43 in the mounting groove 122 of the fixing platform 121. Then, the anchor block 43 is reinforced by the fixing block 124 sliding and engaging in the fixing groove 123, thereby reducing the probability of the anchor block 43 being displaced by seawater impact and reducing the probability of marine life or marine debris passing through the bottom of the net body 42. A drive rod 13 is installed on the breakwater pier 0. A disassembly block 14 is fixed at one end of the drive rod 13. The disassembly block 14 is slidably set at the bottom of the fixing groove 123. The moving rod 13 drives the disassembly block 14 to slide and seal the fixing slot 123. The end of the driving rod 13 away from the disassembly block 14 extends to the top of the plate. The setting of the driving rod 13 makes it convenient to drive the disassembly block 14 on the dike abutment 0. By driving the disassembly block 14, when it is necessary to disassemble the net body 42, the fixing block 124 can be driven to disengage from the fixing slot 123 without entering the seabed. A return spring 15 is set between the disassembly block 14 and the fixing platform 121. The return spring 15 drives the disassembly block 14 to seal the fixing slot 123. A driving spring 16 is set between the fixing block 124 and the anchor block 43. The driving spring 16 drives the fixing block 43. The locking block 124 slides out of the anchor block 43. The elastic force of the drive spring 16 is greater than that of the return spring 15. The return spring 15 is designed to drive the disassembly block 14 to block the fixed slot 123 when the fixed slot 123 is not in use, thereby reducing the entry of debris or marine organisms into the fixed slot 123 and blocking it. The elastic force of the drive spring 16 is greater than that of the return spring 15, which can drive the fixed locking block 124 to push the disassembly block 14 through the drive spring 16, so that the fixed locking block 124 can be properly locked in the fixed slot 123. The disassembly and assembly component 12 is used for reinforcement.

[0026] Reference Figure 1 and Figure 2Each of the following structures is equipped with a receiving hopper 17 at the bottom of the debris-blocking net 2, the pleated net 3, and the bottom net 4, facing away from the nuclear power plant: the head pier 0. Anchor blocks 43 are fixedly installed at the bottom of the debris-blocking net 2 and the pleated net 3. In this embodiment, a disassembly and assembly assembly 12 is also installed between the anchor blocks 43 fixed at the bottom of the debris-blocking net 2 and the pleated net 3 and the head pier 0. When the debris-blocking net 2, the pleated net 3, and the bottom net 4 are fixed to the bottom of the water intake by the anchor blocks 43, the anchor blocks 43 of the debris-blocking net 2, the pleated net 3, and the bottom net 4 are all located in the receiving hopper 17. The receiving hopper 17 is designed to receive marine organisms and marine debris intercepted by the debris-blocking net 2, the pleated net 3, and the bottom net 4.

[0027] Reference Figure 1 and Figure 2 The bottom of the receiving hopper 17 is equipped with a discharge pipe 18, which is connected to and communicates with all the receiving hoppers 17. One end of the discharge pipe 18 extends to the outside of the breakwater pier 0, and the other end of the discharge pipe 18 is connected to a water pump. The water pump is used as a power source to extract debris from the receiving hopper 17. The discharge pipe 18 can discharge intercepted marine organisms and marine debris to the outside of the breakwater pier 0, reducing the probability of intercepted marine organisms and marine debris clogging the cold source inlet. The connection between the receiving hopper 17 and the discharge pipe 18 is slip-resistant. A baffle 19 is provided, which opens or closes the discharge pipe 18 by sliding. Under normal conditions, the baffle 19 is driven to close the discharge pipe 18 by the elastic force of the closing spring. After the debris-blocking net 2, the pleated net 3, and the bottom net 4 are installed, the anchor blocks 43 on the debris-blocking net 2, the pleated net 3, and the bottom net 4 respectively drive the baffle 19 at the corresponding discharge pipe 18, thereby opening the discharge pipe 18. The baffle 19 can close the discharge pipe 18 when the debris-blocking net 2, the pleated net 3, and the bottom net 4 are installed, thereby reducing the workload of the classification pool 21 when there is no interception.

[0028] Reference Figure 1 A sorting platform 20 is set outside the dike pier 0. A sorting pool 21 is opened on the sorting platform 20. The discharge pipe 18 is connected to and communicates with the sorting pool 21. The setting of the sorting pool 21 can facilitate the sorting of marine life and marine debris, so that marine life can return to the sea and marine debris can be cleaned up, reducing marine debris pollution to the ocean.

[0029] Reference Figure 1 and Figure 4The netting 3 includes a barrier net 31 and a net bag 32. The barrier net 31 is vertically installed between the embankment abutments 0. Installation holes 22 are evenly distributed along the length of the barrier net 31. The net bag 32 corresponds to and covers the installation holes 22. A discharge port 23 is provided at the end of the net bag 32 furthest from the barrier net 31. An opening and closing mechanism 24 is provided at the discharge port 23. The opening and closing mechanism 24 opens or closes the discharge port 23. The embankment abutment 0 is located at the end of the net bag 32 furthest from the barrier net 31. A floating platform 25 is provided at one end, and a suction robot 26 is slidably mounted on the floating platform 25. In this embodiment, the suction robot 26 includes a tracked vehicle and a power pump mounted on the tracked vehicle. The suction robot 26 is equipped with a suction pipe 27 and a discharge pipe 28, which are respectively connected to the power pump. The suction pipe is detachably connected to the discharge port 23. When the suction pipe 27 is connected to the discharge port 23, the opening and closing mechanism 24 opens the discharge port 23. The discharge pipe 28 is connected to the discharge pipe 18 through a corrugated hose. The suction robot 26 is connected to any net bag 32 in the length direction of the captive net 3 by sliding on the floating platform 25, and removes debris from any net bag 32 on the captive net 3. The suction robot 26 removes marine organisms and marine debris intercepted by the captive net 3, thereby reducing the probability of the net bag 32 of the captive net 3 being blocked, and can also clean up marine debris captured by the net bag 32 in a timely manner. The opening and closing mechanism 24 includes an opening and closing plate 2. 41 and torsion spring 242, there are several opening and closing plates 241, all of which are rotatably set inside the discharge port 23. The opening and closing plates 241 rotate toward the net bag 32. The torsion spring 242 is installed between the opening and closing plates 241 and the discharge port 23. The torsion spring 242 drives the several opening and closing plates 241 to rotate and close the discharge port 23. An opening ring block 29 is fixed on the suction pipe 27. When the suction pipe 27 is connected to the discharge port 23, the opening ring block 29 drives the opening and closing plates 241 to rotate and open the discharge port 23.

[0030] Reference Figure 1 Several partition dikes 10 are set between the two dike abutments 0. In this embodiment, there are a total of 10 spans of partition dikes 10. The middle partition dike 10 has 2 spans on both sides, each span is 13m long. The remaining partition dikes 10 have a total of 8 spans, each span is 16m long. The bottom elevation of the channel is -7.5m. The debris-blocking net 2, the tension net with a pleated 3, and the bottom net 4 are all set separately between the partition dikes 10 or between the dike abutments 0 and the partition dikes 10. The implementation principle of this application embodiment is as follows: The discharge pipe 18 is laid on the seabed, then the receiving bucket 17 is installed on the seabed. The debris barrier 2, the tensioned net 3, and the bottom net 4 are installed on the breakwater pier 0. Anchor blocks 43 guide the debris barrier 2, the tensioned net 3, and the bottom net 4 to the bottom of the sea area and fix them to the breakwater pier 0. Simultaneously, the baffle 19 is driven to slide and open the discharge pipe 18 while the nuclear power unit needs cooling. When the nuclear power unit needs cooling, it draws seawater. The seawater passes sequentially through the outer sea guiding net 1, the debris barrier 2, the tensioned net 3, and the bottom net 4. Net 2, net 3 with a capillary flap, and net 4 intercept marine life and marine debris in the seawater and send the seawater into the nuclear power unit to cool the unit. When the nuclear power unit stops cooling, water is pumped through discharge pipe 18 to discharge the marine life and marine debris blocked by net 2, net 3 with a capillary flap, and net 4 into sorting pool 21. At the same time, suction robot 26 sequentially sucks out the marine life and marine debris from net 32 ​​and transports them to sorting pool 21. Then, the marine debris is sorted and packaged in sorting pool 21, and the marine life is returned to the sea. When debris adheres to net 4, the debris is brushed off by driving net body 42.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cold source filtration and interception device for a nuclear power plant, comprising an offshore guiding net (1), a debris-blocking net (2), a tensioned net (3), and a bottom-covering net (4), wherein the offshore guiding net (1), the debris-blocking net (2), the tensioned net (3), and the bottom-covering net (4) are all installed on the headworks pier (0) of the nuclear power plant intake, and the offshore guiding net (1), the debris-blocking net (2), the tensioned net (3), and the bottom-covering net (4) are arranged sequentially from far to near on the headworks pier (0) towards the nuclear power plant, characterized in that: The bottom net (4) includes an installation platform (41), a net body (42), and anchor blocks (43). The installation platform (41) is installed on the embankment abutment (0). The net body (42) is installed on the installation platform (41). The anchor blocks (43) are installed on the net body (42) and can be detachably installed at the bottom of the embankment abutment (0). A winding roller (7) is rotatably mounted on the installation platform (41). A guide roller (8) is rotatably mounted on the anchor blocks (43). The net body (42) is connected end to end and sleeved on the winding roller (7) and the guide roller (8). Between the guide roller (8), a cleaning mechanism (9) is provided on the guide roller (8). The cleaning mechanism (9) includes a mounting plate (91), a clamping rod (92), and bristles (93). The mounting plate (91) is fixed on the guide roller (8). The clamping rod (92) is slidably disposed on the mounting plate (91). The clamping rod (92) slides toward the direction of approaching or away from the take-up roller (7). The mounting plate (91) is fixed on the anchor block (43). The bristles (93) are installed on the clamping rod (92). The bristles (93) abut against the net body (42) toward the direction of approaching or away from the take-up roller (7). To the outside of the nuclear power plant; a disassembly assembly (12) is provided between the anchor block (43) and the embankment abutment (0). The disassembly assembly (12) includes a fixing platform (121), an installation groove (122), a fixing slot (123), and a fixing block (124). The fixing platform (121) is installed on the embankment abutment (0). The installation groove (122) is opened on the fixing platform (121). The fixing slot (123) is opened on the side wall of the installation groove (122) on the fixing platform (121). The fixing block (124) slides... The anchor block (43) is moved and lowered into the installation groove (122) by sliding. When the anchor block (43) is engaged in the installation groove (122), the fixing block (124) is engaged in the fixing groove (123). A drive rod (13) is installed on the embankment pier (0). A disassembly block (14) is fixed at one end of the drive rod (13). The disassembly block (14) is slidably set at the bottom of the fixing groove (123). The drive rod (13) drives the disassembly block (14) to slide and block the fixing groove (123).

2. The nuclear power plant cold source filtering and interception device according to claim 1, characterized in that: A reset spring (15) is provided between the disassembly block (14) and the fixing platform (121). The reset spring (15) drives the disassembly block (14) to block the fixing slot (123). A drive spring (16) is provided between the fixing block (124) and the anchor block (43). The drive spring (16) drives the fixing block (124) to slide out of the anchor block (43). The elastic force of the drive spring (16) is greater than that of the reset spring (15).

3. The nuclear power plant cold source filtering and interception device according to claim 2, characterized in that: The embankment (0) is equipped with receiving buckets (17) at the bottom of the debris net (2), the slack net (3), and the bottom net (4) facing away from the nuclear power plant.

4. A nuclear power plant cold source filtering and interception device according to claim 3, characterized in that: The bottom of the receiving bucket (17) is provided with a discharge pipe (18), which is connected to and communicates with all the receiving buckets (17). One end of the discharge pipe (18) extends to the outside of the embankment pier (0).

5. A nuclear power plant cold source filtering and interception device according to claim 4, characterized in that: A sorting platform (20) is provided outside the embankment pier (0), and a sorting pool (21) is provided on the sorting platform (20). The discharge pipe (18) is connected to and communicates with the sorting pool (21).

6. A nuclear power plant cold source filtering and interception device according to claim 5, characterized in that: A baffle (19) is slidably installed at the connection between the receiving hopper (17) and the discharge pipe (18). The baffle (19) opens or closes the discharge pipe (18) by sliding. After the debris net (2), the slack net (3) and the bottom net (4) are installed, the baffle (19) is driven to open the discharge pipe (18).

7. A nuclear power plant cold source filtering and interception device according to claim 6, characterized in that: The netting (3) includes a barrier net (31) and a net bag (32). The barrier net (31) is vertically installed between the embankment abutments (0). The barrier net (31) has mounting holes (22). The net bag (32) is installed in the mounting holes (22). The end of the net bag (32) away from the barrier net (31) has a discharge port (23). The discharge port (23) is equipped with an opening and closing mechanism (24). The opening and closing mechanism (24) opens or closes the discharge port (23). A floating platform (25) is provided at the end of the platform (0) away from the net (32) and the barrier net (31). A suction robot (26) is slidably mounted on the floating platform (25). A suction pipe (27) and a discharge pipe (28) are installed on the suction robot (26). The suction pipe is detachably connected to the discharge port (23). When the suction pipe (27) is connected to the discharge port (23), the opening and closing mechanism (24) opens the discharge port (23). The discharge pipe (28) is connected to the discharge pipe (18).

8. A nuclear power plant cold source filtering and interception device according to claim 7, characterized in that: An oil boom (6) is installed between the offshore guide net (1) and the debris barrier net (2).

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