CN211256890U

CN211256890U - Nuclear power water intaking open channel sea biological automatic filtering silt blocking system

Info

Publication number: CN211256890U
Application number: CN201922034980.8U
Authority: CN
Inventors: 严立文; 黄海军; 张泽华
Original assignee: Institute of Oceanology of CAS
Current assignee: Institute of Oceanology of CAS
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-08-14
Anticipated expiration: 2029-11-22

Abstract

The utility model relates to a nuclear power water intaking open channel sea biological automation blocks and filters silt system, all install the sprocket assembly on the wall of open channel both sides, the sprocket assembly has independent power supply A, through the chain meshing transmission between each sprocket in the sprocket assembly, is connected with the filter screen between the chain of both sides, the power supply A of both sides sprocket assembly is synchronous to be worked, drives the filter screen through the chain and moves; the sea water one side of intaking of filter screen is the front, is equipped with the cleaning device who installs between the wall of open channel both sides on the filter screen movement track, and cleaning device sets up with the front of filter screen relatively, and cleaning device has the scraper blade of scraping debris on the filter screen, and the scraper blade passes through power supply B drive reciprocating motion, and the open channel wall outside is equipped with the debris collecting pit, and the debris that the scraper blade was scraped are arranged to the debris collecting pit in through the chute A of installation on the wall. The utility model discloses a biological in the filter screen filtration sea water, clearance device and washing unit are relegated, and the clearance is simple, has avoided the jam of filter screen.

Description

Nuclear power water intaking open channel sea biological automatic filtering silt blocking system

Technical Field

The utility model belongs to nuclear power station water intaking safety protection field, specifically speaking are nuclear power water intaking open channel sea biological automation blocks filters silt system.

Background

With the development of science and technology and humanity, nuclear power plants are becoming more mature and play a great role, and the pumping stations of the nuclear power plants provide water sources for cooling related systems downstream of the pumping stations. Most of the existing nuclear power stations are located on the coast, a large amount of marine organisms in seawater can damage the interior of the nuclear power station, even cause shutdown accidents in severe cases, and therefore seawater entering from the upstream of a water inlet flow channel of a pumping station of the nuclear power station needs to be filtered and can be conveyed to a downstream system for use. At present, marine organisms at a water intake of a nuclear power station are removed mainly by means of manual fishing, marine organism expelling, filter screen filtering and the like, but the existing scheme has the following problems that firstly, the manual fishing cost is high, and the operation requirements under extreme conditions such as storm surge, rainstorm and the like cannot be met; secondly, the marine organism dislodging system cannot dislodge all kinds of marine organisms, and is complex in machine structure, high in manufacturing cost and inconvenient to maintain, and in addition, the marine organism dislodging system cannot dislodge plants such as seaweeds and the like, so that the effect is not obvious; and though can filter the biology in the sea water through the filtration of multilayer filter screen, plankton and sessile organism can be attached to the filter screen, and the filter screen can be blockked up not good clearance, and can reduce the water intaking velocity of flow.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned problem that current nuclear power station sea water filtration exists, the utility model aims to provide a nuclear power water intaking open channel sea biology is automatic to be blocked filters silt system. This automatic it filters silt system to block adopts the filter screen to filter marine organism, cooperation cleaning device and washing unit, can filter the biology (including plankton and sessile organism) in the sea water, and the clearance is convenient, and the machine is simple, and it is convenient to maintain.

The purpose of the utility model is realized through the following technical scheme:

the blocking filtering silt system is arranged in an open channel between a seawater intake and a nuclear power station, and comprises chain wheel assemblies, chains, filter screens, a cleaning device and a debris collecting pool, wherein the chain wheel assemblies with the same structure are arranged on wall surfaces on two sides of the open channel, the chain wheel assembly on each side is provided with an independent power source A, the chain wheels in the chain wheel assembly on each side are meshed and driven through the chains, the filter screens are connected between the chains on two sides, and the power sources A of the chain wheel assemblies on two sides synchronously work to drive the filter screens to move through the chains on two sides; the sea water one side of intaking of filter screen is the front, is equipped with the cleaning device who installs between the wall of open channel both sides on the filter screen movement track, this cleaning device with the front of filter screen sets up relatively, cleaning device has the scraper blade of scraping debris on the filter screen, and this scraper blade passes through power supply B drive reciprocating motion between the wall of open channel both sides, one side wall or the both sides wall outside of open channel are equipped with the debris collecting pit, the debris that the scraper blade was scraped are arranged to the debris collecting pit in through the chute A of installing on the wall.

Wherein: the chain wheel assemblies on each side comprise a plurality of chain wheels, and the chain wheels in the chain wheel assemblies on the two sides are the same in number and are symmetrically arranged in a one-to-one correspondence manner; each chain wheel in the chain wheel assembly on each side is in meshed transmission through a chain, the chain is provided with a U-shaped part on the motion track of the driving filter screen, the opening of the U-shaped part faces the seawater inlet direction, the cleaning device is positioned in the U-shaped part, and the scraping plate scrapes sundries on the lower filter screen through the driving of a power source B.

The chain wheel assembly comprises a chain wheel A, a chain wheel B, a chain wheel C, a chain wheel D, a chain wheel E, a chain wheel F and a chain wheel G, the chain wheel B and the chain wheel A are arranged in a front-back mode at the same height, the chain wheel C is positioned above the rear slope of the chain wheel B, the chain wheel D is positioned above the rear side of the chain wheel C, the chain wheel E is positioned above the chain wheel D, the chain wheel F and the chain wheel G are arranged on the front-back side above the chain wheel E at the same height, and the chain wheel C, the chain wheel D, the chain wheel E, the chain wheel F and the; the filter screens between the chain wheels C and D and the filter screens between the chain wheels E and F are the two sides of the U-shaped opening, the front sides of the filter screens between the chain wheels C and D are upward, and the front sides of the filter screens between the chain wheels E and F are downward; at least one of the chain wheels is driven to rotate by a power source A arranged on the wall surface.

The chain moves along the direction from the chain wheel A to the chain wheel B, and the filter screen is fixedly connected with the chain through a penetrating rod; and the chain between the chain wheel C and the chain wheel D and the chain between the chain wheel E and the chain wheel F are both parallel to the horizontal plane.

The utility model discloses a chain, including the chain, the chain is equipped with the roller that prevents the filter screen flagging below the "U" shape portion of chain, and this roller is the step shaft, and roller both ends diameter is less than the interlude diameter promptly, the both ends of roller are rotated and are installed on the wall of open channel both sides.

A washing device is arranged on the movement track of the filter screen driven by the chain, the washing device comprises a spray head, a chute B and a washing pipeline, the washing pipeline is arranged between wall surfaces on two sides of the open channel, and one end of the washing pipeline is communicated with a washing water source; the cleaning pipeline is communicated with a spray head, the chute B is installed between wall surfaces of two sides of the open channel and is respectively positioned on two positive sides of the filter screen, the outlet end of the chute B is positioned above the impurity collecting tank, and the outlet end of the chute B is the lowest position of the height of the chute B.

The front surface of the filter screen is uniformly provided with a plurality of baffle plates, one end of each baffle plate is connected to the filter screen, the other end of each baffle plate is of a tooth-shaped structure, and a plurality of water through holes are uniformly formed in the baffle plates along the length direction; the baffle plate inclines upwards from one end to the other end.

The cleaning device comprises a scraper, a motor, a gear, a rack, a horizontal guide rail, a chute A and a sliding sleeve, wherein the rack and the horizontal guide rail are respectively installed between wall surfaces on two sides of the open channel; the motor is a power source B, the motor is arranged at the upper part of the scraper, and an output shaft is connected with a gear meshed with the rack; the chute A is obliquely arranged on the wall surface, the inlet end is positioned below the cleaned filter screen and is higher than the outlet end, and the outlet end of the chute A is positioned above the impurity collecting tank; the motor drives the gear to rotate, and the scraper plate reciprocates along the horizontal guide rail through the meshing transmission of the gear and the rack, scrapes sundries on the filter screen into the chute A, and then falls into the sundry collecting tank through the chute A.

The cleaning device comprises a power source B, a screw rod, a nut, a scraper and a chute A, wherein the screw rod is rotatably installed between wall surfaces on two sides of the open channel, any end of the screw rod is connected with the power source B installed on the wall surfaces and is driven to rotate by the power source B, the screw rod is in threaded connection with the nut, the nut and the screw rod form a screw pair, and the scraper is connected with the nut; the chute A is obliquely arranged on the wall surface, the inlet end is positioned below the cleaned filter screen and is higher than the outlet end, and the outlet end of the chute A is positioned above the impurity collecting tank; the scraping plate reciprocates along the axial direction of the screw rod under the driving of the power source B along with the screw nut, scrapes sundries on the filter screen into the chute A, and then falls into the sundry collecting tank through the chute A.

The chain is intermittent motion, is in the filter screen openly with the sea water contact of intaking the part the place ahead be equipped with sonar detection device, this sonar detection device, power supply A and power supply B are connected with the control cabinet respectively.

The utility model discloses an advantage does with positive effect:

1. the utility model has the advantages of simple structure and convenient maintenance, and can filter the organisms in the seawater by adopting the filter screen; on the other hand, the utility model discloses cooperation cleaning device, the clearance is simple, has avoided the jam of filter screen.

2. The utility model discloses still set up washing unit, washed the filter screen of scraping the debris by cleaning device, further avoided blockking up the filter screen.

3. The utility model discloses set up the roller below the filter screen, prevented that the filter screen from flagging.

4. The utility model discloses set up the baffle of tilt up in the filter screen front, can take accumulational debris in filter screen the place ahead to cleaning device department and clear up.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1 with the chain omitted;

FIG. 3 is an enlarged view of a portion of FIG. 2 at C;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

FIG. 5 is a schematic diagram of the distribution of the present invention;

FIG. 6 is a schematic view of the connection structure of the filter screen and the chain of the present invention;

fig. 7 is a schematic structural view of the baffle of the present invention;

wherein: the system comprises a drawing and filtering silt system 1, an open channel 2, a water intake 3, a sundries collecting tank 4, a nuclear power station 5, a console 6, a left cement wall 7, a right cement wall 8, a sprocket A10, a chain 11, a filter screen 12, a baffle 13, a sonar detection device 14, a penetrating rod 15, a water through hole 16, a sprocket B20, a sprocket C30, a roller shaft 31, a bearing 32, a scraper 33, a motor 34, a gear 35, a rack 36, a horizontal guide rail 37, a chute A38, a sliding sleeve 39, a sprocket D40, a sprocket E50, a nozzle 51, a chute B52, a cleaning pipeline 53, a sprocket F60 and a sprocket G70.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-7, the utility model discloses a block and filter silt system 1 and set up in open channel 2 between intake 3 of sea water and nuclear power station 5, including the sprocket assembly, chain 11, filter screen 12, cleaning device and debris collecting pit 4, all install the same sprocket assembly of structure on the wall of open channel 2 both sides, the sprocket assembly of every side has independent power supply A, through 11 meshing transmissions of chain between each sprocket in the sprocket assembly of every side, be connected with filter screen 12 between the chain 11 of both sides, the power supply A synchronous working of both sides sprocket assembly, drive the motion of filter screen 12 through the chain 11 of both sides. The seawater inlet side of the filter screen 12 is a front side, a cleaning device arranged between wall surfaces on two sides of the open channel 2 is arranged on the movement track of the filter screen 12, the cleaning device is arranged opposite to the front side of the filter screen 12 and is provided with a scraper 33 for scraping impurities on the filter screen 12, the scraper 33 is driven by a power source B to reciprocate between the wall surfaces on two sides of the open channel 2, an impurity collecting pool 4 is arranged on the outer side of one side wall surface or two side wall surfaces of the open channel 2, and the impurities scraped by the scraper 33 are discharged into the impurity collecting pool 4 through a chute A38 arranged on the wall surfaces.

The chain wheel assembly on each side comprises a plurality of chain wheels, and the chain wheels in the chain wheel assemblies on the two sides are the same in number and are symmetrically arranged in a one-to-one correspondence manner; the chain wheels in the chain wheel assembly on each side are in meshed transmission through the chain 11, the chain 11 drives the filter screen 12 to move along the track, the U-shaped part is arranged on the motion track of the chain 11, the opening of the U-shaped part faces the seawater inlet direction, the cleaning device is arranged inside the U-shaped part, and the scraper 33 scrapes sundries on the lower filter screen 12 through the driving of the power source B. The open channel 2 of this embodiment is close to the one end of intake 3, installs left sprocket assembly on the left cement wall 7, installs right sprocket assembly on the right cement wall 8, and left and right sprocket assembly structure, arrangement are the same completely. The nuclear power station 5 is introduced to the other end of open channel 2 to set up control cabinet 6 in open channel 2 one side, the utility model discloses a control cabinet 6 is prior art. The sundries collecting pool 4 is located on the outer side of the left cement wall surface 7 and/or the outer side of the right cement wall surface 8, and the sundries collecting pool 4 is respectively arranged on the outer sides of the left cement wall surface 7 and the right cement wall surface 8. The chain wheel assembly of the embodiment comprises a chain wheel A10, a chain wheel B20, a chain wheel C30, a chain wheel D40, a chain wheel E50, a chain wheel F60 and a chain wheel G70, wherein seven chain wheels are meshed through a chain 11 for transmission, each chain wheel is rotatably installed on a wall surface through a half shaft respectively, the half shafts of the chain wheels are parallel to each other, the chain wheels in the left chain wheel assembly and the right chain wheel assembly are symmetrically arranged in a one-to-one correspondence mode, and the axial center lines of the half shafts of the two symmetrical chain wheels are collinear. Taking a left sprocket assembly installed on a left cement wall surface 7 as an example, a sprocket B20 and a sprocket A10 are arranged at the bottom of the left cement wall surface 7 in a front-back manner, a sprocket C30 is positioned at the rear oblique upper side of the sprocket B20, a sprocket D40 is positioned at the rear upper side of a sprocket C30, a sprocket E50 is positioned at the upper side of the sprocket D40, a sprocket F60 and a sprocket G70 are arranged at the front-back two sides above the sprocket E50 in a height manner and are horizontally arranged, and a sprocket C70 is positioned above the sprocket A10; the chain wheel C30, the chain wheel D40, the chain wheel E50, the chain wheel F60 and the chain wheel G70 are all positioned above the seawater surface; the filter screens 12 between the chain wheel C30 and the chain wheel D40 and the filter screens 12 between the chain wheel E50 and the chain wheel F60 are two sides of the U-shaped opening, the right side of the filter screens 12 between the chain wheel C30 and the chain wheel D40 faces upwards, and the right side of the filter screens 12 between the chain wheel E50 and the chain wheel F60 faces downwards; in the embodiment, the chain between the chain wheel C30 and the chain wheel D40, the chain between the chain wheel E50 and the chain wheel F60, the chain between the chain wheel F60 and the chain wheel G70, and the chain between the chain wheel A10 and the chain wheel B20 are all parallel to the horizontal plane, the chain between the chain wheel A10 and the chain wheel G70, the chain between the chain wheel D40 and the chain wheel E50 are all parallel to the vertical plane, and the chain between the chain wheel B20 and the chain wheel C30 inclines from bottom to top to the side far away from seawater inlet water. At least one of the chain wheels is driven to rotate by a power source A arranged on the left cement wall surface 7, and the chain wheel C30, the chain wheel F60 and the chain wheel G70 of the embodiment are driven by a motor arranged on the left cement wall surface 7 and rotate synchronously; the three chain wheels drive the chain 11 at the same time, so that the stress concentration of the chain 11 is reduced, and the chain 11 is prevented from being broken. The chain 11 moves along the chain wheel A10 to the direction of the chain wheel B20, and the filter screen 12 is fixedly connected with the chain 11 through the penetrating rod 15, so that the filter screen 12 is prevented from sagging in the cleaning process.

This embodiment evenly is equipped with a plurality of baffles 13 in the front of filter screen 12, and each baffle 13 is parallel to each other, and the one end of every baffle 13 is connected on filter screen 12, and the other end is dentate structure, has evenly seted up a plurality of water holes 16 of crossing along length direction on the baffle 13. The front of the filter screen 12 between the chain wheel B20 and the chain wheel C30 is provided with a collection of marine life or sundries, the baffle 13 of the embodiment is inclined (inclined upwards) from one end to the other end along the moving direction, a plurality of water holes 16 for reducing water resistance are uniformly distributed on the baffle 13, and in the moving process of the baffle 13 along with the filter screen 12, the baffle 13 inclined upwards can take up the sundries such as the marine life and the like collected in front of the filter screen 12 and move to the cleaning device to be cleaned by the cleaning device.

A roller shaft 31 for preventing the filter screen 12 from drooping is arranged below the U-shaped part of the chain 11. In this embodiment, a plurality of roller shafts 31 are provided below the screen 12 between the sprocket C and the sprocket D40, the roller shafts 31 are arranged at the same height, and both ends of each roller shaft 31 are rotatably connected to the left and right

cement wall surfaces

7 and 8 through bearings 32. The roll shafts 31 are stepped shafts, that is, the diameters of both ends of the roll shafts 31 are smaller than the diameter of the middle section, and the middle section of each roll shaft 31 supports the filter screen 12 to prevent the filter screen 12 from sagging.

The cleaning device comprises a scraper 33, a motor 34, a gear 35, a rack 36, a horizontal guide rail 37, a chute A38 and a sliding sleeve 39, wherein the rack 36 and the horizontal guide rail 37 are respectively installed between the left and right

cement wall surfaces

7 and 8 at two sides of the open channel 2, the two horizontal guide rails 37 of the embodiment are arranged in parallel at equal heights, the rack 36 is positioned at the middle position above the two horizontal guide rails 37, and the direction of teeth on the rack 36 is downward. The upper part of the scraper 33 is connected with the horizontal guide rail 37 in a sliding way through a sliding sleeve 39, and the lower part of the scraper 33 is used for scraping sundries on the filter screen 12; the upper part of the scraper 33 of the embodiment is a flat plate parallel to the horizontal plane, and sliding sleeves 39 are arranged on the front side and the rear side of the flat plate and are respectively connected with two horizontal guide rails 37 in a sliding manner; the lower portion of the scraper 33 is a vertical plate perpendicular to the flat plate, and the lower end of the vertical plate is pointed. The lower vertical plate of the scraper 33 is an inclined plate, and the inclined direction of the baffle 13 on the screen 12 between the chain wheel C30 and the chain wheel D40 is the same. The motor 34 is a power source B, the motor 34 is fixed to the flat plate of the squeegee 33, and the output shaft is connected to a gear 35 that meshes with a rack 36. The left cement wall surface 7 and the right cement wall surface 8 are respectively provided with a hole, a chute A38 is obliquely arranged in the holes, the inlet end of the chute A38 is positioned below the cleaned filter screen 12 and is higher than the outlet end, and the outlet end of the chute A38 is positioned above the sundries collecting pool 4; the inlet end of the chute a38 of this embodiment is located below the end of each roller shaft 31 having a smaller diameter. The motor 34 drives the gear 35 to rotate, the gear 35 and the rack 36 are in meshing transmission, and the meshing strip 36 is fixed, so that the motor 34 drives the scraper 33 to reciprocate along the horizontal guide rail 37 through reaction force, the scraper moves between two adjacent baffles 13 to scrape sundries on the filter screen 12 to two ends, the sundries fall into the chute A38 from the end part with the small diameter of the roller shaft 31, and then fall into the sundry collecting tank 4 through the inclined chute A38.

Alternatively, the cleaning device may be of another configuration; that is, the cleaning device includes a power source B, a lead screw, a nut, a scraper 33 and a chute a38, the lead screw is rotatably installed between the left and right

cement wall surfaces

7 and 8 at both sides of the open channel 2, any end of the lead screw is connected with the power source B (which may be a motor) installed on the wall surface, the lead screw is driven to rotate by the power source B, the nut is connected with the lead screw through a thread, the nut and the lead screw form a screw pair, and the scraper 33 is connected with the nut. The chute a38 is provided in the same manner as the cleaning apparatus described above and will not be described in detail. The scraping plate 33 reciprocates along the axial direction of the screw rod under the drive of the power source B along with the nut, scrapes the sundries on the filter screen 12 into the chute A38, and then falls into the sundries collecting tank 4 through the chute A38.

The chain 11 drives the filter screen 12 to move on the track, the flushing device comprises a nozzle 51, a chute B52 and a cleaning pipeline 53, the cleaning pipeline 53 is installed between the left and right

cement wall surfaces

7 and 8 at the two sides of the open channel 2, and one end of the cleaning pipeline 53 is communicated with a cleaning water source. The cleaning pipeline 53 is communicated with a spray head 51, the chute B52 is installed between the left and right

cement wall surfaces

7 and 8 at the two sides of the open channel 2 and is respectively positioned at the two sides of the front surface of the filter screen 12 together with the cleaning pipeline 53, the outlet end of the chute B52 is positioned above the sundries collecting tank 4, and the outlet end is the lowest position of the height of the chute B52. The flushing device of the embodiment is arranged between a chain wheel E50 and a chain wheel F60, a cleaning pipeline 53 is positioned above a filter screen 12 between the chain wheel E50 and the chain wheel F60, a chute B52 is positioned below the filter screen 12 between the chain wheel E50 and the chain wheel F60, and at least one row of spray heads 51 (five rows of spray heads 51 in the embodiment) are arranged on the cleaning pipeline 53; the chute B52 of this embodiment inclines from the middle to both ends, and the lowest position is the exit end of the chute B52, and the exit end penetrates through the holes formed on the left and right

cement wall surfaces

7 and 8, and is located above the sundries collecting tank 4, so that the washed sundries are discharged to the sundries collecting tank 4.

The chain 11 of this embodiment is an intermittent motion, a sonar detection device 14 is arranged in front of the part of the front surface of the filter screen 12 which is contacted with the seawater inflow (i.e. the filter screen 12 between the chain wheel B20 and the chain wheel C30), and the sonar detection device 14 of this embodiment is a multi-frequency sonar sensor of IMAGENEX, Canada; the sonar detection device 14, the power source a, and the power source B are connected to the console 6.

The utility model discloses a theory of operation does:

the sonar detection device 14 senses an acoustic post-scattering intensity TS signal and sends the signal to the control console 6, the control console 6 analyzes the thickness and biomass of marine organisms, when the sonar detection device detects that the thickness or biomass index of sundries on the filter screen 12 between the chain wheel B20 and the chain wheel C30 reaches a set threshold value, the threshold value is exceeded, a motor of the chain wheel assembly is started, each chain wheel is controlled to rotate, the chain 11 is driven to rotate through the chain wheel, and the chain 11 drives the filter screen 12 to rotate; when the part of the filter screen 12 where the sundries are accumulated rotates to the position below the scraper 33, the motor of the chain wheel assembly stops working, the control console 6 starts the motor 34, the scraper 33 is driven by the motor 34 through the meshing of the gear 35 and the rack 36 to move along the horizontal guide rail 37 so as to scrape the sundries on the filter screen 12, and the sundries drop into the sundry collecting tank 4 through the chute A38; after the scraping is completed, the motor 34 drives the scraper 33 to reset, and waits for the next scraping. Then, the control console 6 starts the motor of the chain wheel assembly again, the chain 11 continues to rotate, in the rotating process, the spray head 51 washes away the sundries remained on the filter screen 12, and the cleaned sundries are discharged to the sundries collecting tank 4 through the chute B52.

Claims

1. The utility model provides a nuclear power water intaking open channel marine organism is automatic to be blocked filters silt system which characterized in that: the blocking and filtering silt system (1) is arranged in an open channel (2) between a seawater intake (3) and a nuclear power station (5) and comprises chain wheel assemblies, chains (11), filter screens (12), a cleaning device and a debris collecting pool (4), wherein the chain wheel assemblies with the same structure are arranged on wall surfaces on two sides of the open channel (2), the chain wheel assemblies on each side are provided with independent power sources A, the chain wheels in the chain wheel assemblies on each side are in meshing transmission through the chains (11), the filter screens (12) are connected between the chains (11) on two sides, the power sources A of the chain wheel assemblies on two sides work synchronously, and the chains (11) on two sides drive the filter screens (12) to move; the sea water of filter screen (12) is intake the one side and is positive, is equipped with the cleaning device who installs between open channel (2) both sides wall on filter screen (12) movement track, this cleaning device with the front of filter screen (12) sets up relatively, cleaning device has scraper blade (33) of scraping debris on filter screen (12), and reciprocating motion between open channel (2) both sides wall is driven through power supply B in this scraper blade (33), one side wall or the both sides wall outside of open channel (2) are equipped with debris collecting pit (4), debris that scraper blade (33) scraped arrange to debris collecting pit (4) in chute A (38) of installation on the wall.

2. The automatic sediment trapping and filtering system for open channels and sea creatures for nuclear power water intake according to claim 1, characterized in that: the chain wheel assemblies on each side comprise a plurality of chain wheels, and the chain wheels in the chain wheel assemblies on the two sides are the same in number and are symmetrically arranged in a one-to-one correspondence manner; the chain wheels in the chain wheel assembly on each side are in meshed transmission through a chain (11), the chain (11) is provided with a U-shaped part on the motion track of the driving filter screen (12), the opening of the U-shaped part faces the seawater inlet direction, the cleaning device is positioned in the U-shaped part, and the scraper (33) scrapes sundries on the lower filter screen (12) through the driving of a power source B.

3. The automatic sediment trapping and filtering system for the open channel marine organisms in nuclear power water intaking of claim 2, which is characterized in that: the chain wheel assembly comprises a chain wheel A (10), a chain wheel B (20), a chain wheel C (30), a chain wheel D (40), a chain wheel E (50), a chain wheel F (60) and a chain wheel G (70), wherein the chain wheel B (20) and the chain wheel A (10) are arranged in a front-back mode in a height mode, the chain wheel C (30) is positioned above the chain wheel B (20) in a rear-inclined mode, the chain wheel D (40) is positioned above the rear side of the chain wheel C (30), the chain wheel E (50) is positioned above the chain wheel D (40), the chain wheel F (60) and the chain wheel G (70) are arranged on the front-back two sides above the chain wheel E (50) in a height mode, and the chain wheel C (30), the chain wheel D (40), the chain wheel E (50), the chain wheel F (60) and the chain; the filter screens (12) between the chain wheels C (30) and D (40) and the filter screens (12) between the chain wheels E (50) and F (60) are two sides of the U-shaped opening, the right sides of the filter screens (12) between the chain wheels C (30) and D (40) face upwards, and the right sides of the filter screens (12) between the chain wheels E (50) and F (60) face downwards; at least one of the chain wheels is driven to rotate by a power source A arranged on the wall surface.

4. The automatic sediment trapping and filtering system for open channels for nuclear power water intake and sea organisms according to claim 3, characterized in that: the chain (11) moves along the direction from the chain wheel A (10) to the chain wheel B (20), and the filter screen (12) is fixedly connected with the chain (11) through a through rod (15); and the chain (11) between the chain wheel C (30) and the chain wheel D (40) and the chain (11) between the chain wheel E (50) and the chain wheel F (60) are parallel to the horizontal plane.

5. The automatic sediment trapping and filtering system for the open channel marine organisms in nuclear power water intaking of claim 2, which is characterized in that: the utility model discloses a chain (11) is equipped with roller (31) that prevent filter screen (12) flagging below the "U" shape portion, and this roller (31) are the step shaft, and roller (31) both ends diameter is less than the interlude diameter promptly, the both ends of roller (31) are rotated and are installed on the wall of open channel (2) both sides.

6. The automatic sediment trapping and filtering system for open channels and sea creatures for nuclear power water intake according to claim 1, characterized in that: a washing device is arranged on the movement track of the filter screen (12) driven by the chain (11), the washing device comprises a spray head (51), a chute B (52) and a washing pipeline (53), the washing pipeline (53) is installed between wall surfaces on two sides of the open channel (2), and one end of the washing pipeline (53) is communicated with a washing water source; the cleaning pipeline (53) is communicated with a spray head (51), the chute B (52) is installed between wall surfaces of two sides of the open channel (2) and is respectively positioned on two sides of the front surface of the filter screen (12) together with the cleaning pipeline (53), the outlet end of the chute B (52) is positioned above the impurity collecting tank (4), and the outlet end is the lowest position of the height of the chute B (52).

7. The automatic sediment trapping and filtering system for open channels and sea creatures for nuclear power water intake according to claim 1, characterized in that: a plurality of baffle plates (13) are uniformly arranged on the front surface of the filter screen (12), one ends of the baffle plates (13) are connected to the filter screen (12), the other ends of the baffle plates are of a dentate structure, and a plurality of water through holes (16) are uniformly formed in the baffle plates (13) along the length direction; the baffle (13) inclines upwards from one end to the other end.

8. The automatic sediment trapping and filtering system for open channels and sea creatures for nuclear power water intake according to claim 1, characterized in that: the cleaning device comprises a scraper (33), a motor (34), a gear (35), a rack (36), a horizontal guide rail (37), a chute A (38) and a sliding sleeve (39), wherein the rack (36) and the horizontal guide rail (37) are respectively installed between wall surfaces on two sides of the open channel (2), the upper part of the scraper (33) is in sliding connection with the horizontal guide rail (37) through the sliding sleeve (39), and the lower part of the scraper (33) is used for scraping sundries on the filter screen (12); the motor (34) is a power source B, the motor (34) is arranged at the upper part of the scraping plate (33), and the output shaft is connected with a gear (35) meshed with the rack (36); the chute A (38) is obliquely arranged on the wall surface, the inlet end is positioned below the cleaned filter screen (12) and is higher than the outlet end, and the outlet end of the chute A (38) is positioned above the sundries collecting tank (4); the motor (34) drives the gear (35) to rotate, and the scraper (33) reciprocates along the horizontal guide rail (37) through the meshing transmission of the gear (35) and the rack (36), scrapes impurities on the filter screen (12) into the chute A (38), and then falls into the impurity collecting tank (4) through the chute A (38).

9. The automatic sediment trapping and filtering system for open channels and sea creatures for nuclear power water intake according to claim 1, characterized in that: the cleaning device comprises a power source B, a screw rod, a nut, a scraper (33) and a chute A (38), wherein the screw rod is rotatably installed between wall surfaces on two sides of the open channel (2), any end of the screw rod is connected with the power source B installed on the wall surfaces and is driven to rotate by the power source B, the screw rod is in threaded connection with the nut, the nut and the screw rod form a screw pair, and the scraper (33) is connected with the nut; the chute A (38) is obliquely arranged on the wall surface, the inlet end is positioned below the cleaned filter screen (12) and is higher than the outlet end, and the outlet end of the chute A (38) is positioned above the sundries collecting tank (4); the scraping plate (33) reciprocates along the axial direction of the screw rod under the driving of the power source B along with the nut, scrapes sundries on the filter screen (12) into the chute A (38), and then falls into the sundry collecting tank (4) through the chute A (38).

10. The automatic sediment trapping and filtering system for open channels and sea creatures for nuclear power water intake according to claim 1, characterized in that: chain (11) are intermittent motion, are equipped with sonar detection device (14) in filter screen (12) front and the partial place ahead of the sea water contact of intaking, and this sonar detection device (14), power supply A and power supply B are connected with control cabinet (6) respectively.