CN107989010B - Movable type skimmer for spent fuel storage pool - Google Patents

Abstract

The invention relates to a mobile skimmer for a spent fuel storage pool, which can be used for a temporary spent fuel storage pool and a storage pool of a post-treatment plant of a nuclear power station and comprises a pool surface skimmer and an electric control platform which are connected through a cable assembly; the pool surface skimmer capable of floating on the water surface comprises a sealed central mechanical cabin, wherein a plurality of filtering cabins are arranged on the peripheral side surface of the sealed central mechanical cabin, and a magnetic pump assembly, an outlet reversing device and a steering mechanism which are controlled by an electric control console are arranged in the central mechanical cabin; under the action of the magnetic pump assembly, the surface water body of the water tank is filtered by the filtering cabin, the filtered clear liquid is discharged into the water tank by the outlet reversing device and is used as power for the pool surface skimmer to horizontally move on the surface of the water tank, and the steering mechanism can control the direction of horizontal movement. The device has compact and simple structure and reliable performance, one device can serve a plurality of water tanks, does not occupy the space of the water tank when not removing floating operation, can realize remote operation, can move on the surface of the water tank and suck and filter at the same time, and has high floating removal efficiency.

Description

Movable type skimmer for spent fuel storage pool

Technical Field

The invention belongs to the field of decontamination, and particularly relates to a mobile skimming device for a spent fuel storage pool, which is mainly used for removing dirt floating on the pool surface in the spent fuel storage pool.

Background

In the nuclear fuel cycle, the nuclear fuel discharged after irradiation of the reactor is called "spent fuel". The spent fuel needs to be temporarily stored in a spent fuel storage pool several tens meters deep for cooling before being treated or disposed of. After a period of storage time, radioactive dirt is generated in the pond water, heavier ions, particles or fine debris sink to the bottom, and other lighter floating foam floats on the surface of the pond water, affecting the transparency of the pond water and underwater operation. Therefore, it is necessary to periodically remove floating contaminants from the surface of the pond to maintain pond water clarity and the observation requirements for underwater operations.

The superficial floating filth of pond water surface can distribute at random on the pond water surface, adopts fixed skimming device to have the decontamination dead angle, utilizes pond water circulating filtration system in the past, and the filth is hardly all taken away by endless rivers. In addition, the fixed skimming device occupies part of the operating space of the pool due to the fixed installation on the pool wall.

The liquid pumping and filtering system of the movable skimming device for the spent fuel temporary storage pool of the nuclear power plant is fixedly arranged in a plant, a water suction port and a liquid conveying hose are moved by a crane of the plant, the liquid conveying hose of the device is thick and long, a plurality of floating balls with large volume are required to be arranged for floating the liquid conveying hose on the pool surface, the liquid conveying hose is complex in folding and unfolding actions, and the lifting and the operation are inconvenient.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the mobile skimmer device for the spent fuel storage pool, which integrates driving, steering, filtering and fluid circulating systems together, has a compact structure, can serve a plurality of pools, and does not occupy the pool space when not performing floatation removal operation; the remote operation can be realized, the movement of the device can be realized by utilizing the energy discharged by clear liquid, and the device can move on the surface of the water pool while sucking and filtering; simple structure and reliable performance.

In order to achieve the above purposes, the invention adopts the technical scheme that:

a mobile skimmer for a spent fuel storage pool is used for removing dirt on the surface of the spent fuel storage pool, and comprises a pool surface skimmer and an electric control console which are connected through a cable assembly; the pool surface skimmer capable of floating on the water surface comprises a sealed central mechanical cabin, wherein a plurality of filtering cabins are arranged on the peripheral side surface of the sealed central mechanical cabin, and a magnetic pump assembly, an outlet reversing device and a steering mechanism controlled by the electric control console are arranged in the central mechanical cabin; under magnetic pump unit's effect, the surperficial water process in pond filters the cabin, and the clear liquid that obtains after filtering is by export switching-over device drains back in the pond, and as pool face skimmer is in horizontal migration's power is done on the pond surface, helm steering mechanism can control horizontal motion's direction.

Further, it is conical filter chamber to filter the cabin and include the bottom, conical bottom is equipped with the filter cabin liquid outlet, still including covering filter plate subassembly, the setting that can quick replacement on the filter chamber are in filter chamber bottom outlying buoyancy chamber and setting are in a plurality of pond water weir crest in the filter plate subassembly top outside, the surface water in pond passes through in proper order pond water weir crest, filter plate subassembly enter the filter chamber is followed at last the filter cabin liquid outlet flows filter the cabin.

Further, the magnetic pump assembly comprises a magnetic pump and a magnetic pump encoder for controlling the working speed of a motor of the magnetic pump, and further comprises a pump inlet liquid collecting pipe and a magnetic pump outlet provided with a magnetic pump liquid discharging pipe, wherein the pump inlet liquid collecting pipe is provided with a plurality of pipe orifices, each pipe orifice is provided with a magnetic pump liquid inlet pipe, and each magnetic pump liquid inlet pipe is correspondingly connected with one filtering cabin, so that the clear liquid enters the magnetic pump; the outlet of the magnetic pump is connected with the outlet reversing device through the liquid discharge pipe of the magnetic pump, and the outlet reversing device is used for outputting the clear liquid to the outlet reversing device from the magnetic pump.

Furthermore, the filter cabin is connected with the magnetic pump liquid inlet pipe through a sealed corrugated pipe shock absorber assembly, the corrugated pipe shock absorber assembly is located between the filter cabin and the central mechanical cabin and comprises an elbow flange, a corrugated pipe shock absorber with a flow guide pipe and a hose joint which are sequentially connected, one end of the elbow flange is connected to the filter cabin on the filter cabin liquid outlet, and one end of the hose joint is connected to the magnetic pump liquid inlet pipe.

Further, the outlet reversing device is positioned at the center of the central mechanical cabin and comprises a cylindrical piston cylinder which is vertically arranged at the center and is internally provided with a piston, a magnetic pump liquid drainage inlet which is connected with a magnetic pump liquid drainage pipe of the magnetic pump assembly is arranged on the side surface of the top end of the piston cylinder, a static vertical liquid drainage port which extends downwards to the outside of the bottom of the central mechanical cabin is arranged at the bottom end of the piston cylinder, a horizontal forward liquid drainage port which extends towards one side is arranged on the side surface of the bottom end, the top end of the piston is connected with a lifting screw rod which extends to the outside of the top end of the piston cylinder, a bottom valve is connected with the bottom end of the piston, and a plurality of liquid drainage holes which are parallel to the axis of the piston cylinder and; the piston and the bottom valve can ascend or descend in the piston cylinder along with the lifting screw rod under the driving of the speed reducing motor; the lifting screw rod lifting mechanism further comprises a limit proximity switch, and the limit proximity switch is used for limiting the lifting limit position and the descending limit position of the lifting screw rod; when the lifting screw rod rises to the lifting limit position, the piston and the bottom valve can close the static vertical liquid discharge port and open the horizontal forward liquid discharge port to provide power for the horizontal movement of the pool surface skimmer in the filtering operation; when the lifting screw rod descends to the descending limit position, the piston and the bottom valve can close the horizontal forward liquid outlet and open the static vertical liquid outlet, so that the pool surface skimmer is kept in a static state in the filtering operation; the outlet reversing gear motor encoder is used for controlling the gear motor.

Further, the piston is connected with the lifting screw rod through a movable hinge, and two second sealing rings for sealing the horizontal forward liquid outlet are arranged at the upper end and the lower end of the piston.

Further, the steering mechanism comprises an adjustable valve electric device provided with a steering shaft and a steering plate arranged on the steering shaft; the adjustable valve electric device is arranged in the central mechanical cabin, the rudder shaft extends downwards to the outside of the bottom of the central mechanical cabin, and the rudder plate is positioned outside the bottom of the central mechanical cabin; the adjusting type valve electric device can drive the rudder shaft to enable the rudder plate to rotate within a certain angle range, and steering control of the pool surface skimmer in the horizontal moving process is achieved.

Furthermore, the tail end of the cable assembly is connected to the electric console, and the top end of the cable assembly is detachably connected with the magnetic pump assembly, the outlet reversing device and the steering mechanism in the pool surface skimmer through a sealing cable connecting assembly;

the cable assembly comprises a combined cable with a closed-cell rubber cable jacket wrapped on the outer surface; the closed-cell rubber cable jacket is made of light closed-cell foam rubber, so that the cable assembly can float on the surface of pool water;

the combined cable comprises a cable for controlling the magnetic pump assembly, the outlet reversing device and the steering mechanism;

the sealing cable connecting assembly comprises a cable jacket and a closed-cell rubber pipe joint which are sequentially arranged between the combined cable and the closed-cell rubber cable jacket at the top end of the cable assembly, a pressing sleeve and a first sealing ring which are sequentially arranged between the closed-cell rubber pipe joint and the combined cable, a female plug connected with the top end of the combined cable, a small clamp and a large clamp which are arranged outside the closed-cell rubber cable jacket at the top end of the cable assembly; the pool surface skimmer is characterized by further comprising a male socket matched with the female plug, the male socket is arranged on the side wall of the central machinery cabin of the pool surface skimmer in a penetrating mode, and the magnetic pump assembly, the outlet reversing device and a control cable of the steering mechanism are collected into the male socket; when the female plug and the male socket are connected together, the electric console controls the magnetic pump assembly, the outlet reversing device and the steering mechanism;

under the compression action of the small clamp and the large clamp, the closed-cell rubber pipe joint can prevent water from entering between the combined cable and the closed-cell rubber cable jacket; the first sealing ring and the sealing rings arranged on the female plug and the male socket can prevent water from entering the joint of the female plug and the male socket.

Further, a plurality of adjustable balancing assemblies are disposed above the central machinery compartment for maintaining the pool surface skimmer in balance at the surface of the water.

Further, still include electronic cable drum, automatically controlled platform are fixed the bank in pond, electronic cable drum can follow the pond face skimmer removes and receive in step the cable subassembly.

The invention has the beneficial technical effects that:

1) the invention integrates the driving, steering, filtering and fluid circulating systems together, has compact structure and does not occupy the space of a water tank when not removing floating;

2) the invention utilizes the same power source (magnetic pump) to realize the circulation and the advancing of the filtrate, and the liquid discharge thrust of the advancing system works, thereby simplifying the transmission part and improving the reliability;

3) the magnetic pump and the driving motor are arranged at the downstream of the filtering cabin, and the impeller and the pump body of the magnetic pump are only contacted with the filtered clear liquid, so that the service life and the reliability of the pump are improved, and the maintenance is convenient;

4) the magnetic pump adopts a variable-speed driving motor with an encoder, and hydraulic parameters and motion parameters can be adjusted within the working curve range of the pump;

5) the outlet reversing device can realize the switching between the moving state and the static state, can also realize the reversing in the moving process by utilizing the steering wheel, has flexible operation, free movement and wide coverage range, and is suitable for various working condition requirements;

6) the pool surface skimmer can be kept horizontal by the aid of the balance assemblies.

Drawings

Fig. 1 is a pipeline schematic diagram of a mobile skimmer for a spent fuel storage pool according to an embodiment of the invention;

FIG. 2 is an elevational cross-sectional view of a pool face skimmer structure according to an embodiment of the invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 5 is a cross-sectional view taken along line C-C of FIG. 2;

FIG. 6 is an elevational cross-sectional view of a filter cartridge according to an embodiment of the invention;

FIG. 7 is a plan sectional view of a filter cartridge according to an embodiment of the invention;

FIG. 8 is a schematic view of the inlet and outlet arrangement of the magnetic pump assembly according to the embodiment of the present invention;

FIG. 9 is a view taken along line A of FIG. 8;

FIG. 10 is an elevational cross-sectional view of the exit diverter mechanism in accordance with the exemplary embodiment of the present invention;

FIG. 11 is a schematic view of the outlet diverter mechanism in a static vertical draining state according to an embodiment of the present invention;

FIG. 12 is a cross-sectional view taken along line A-A of FIG. 11;

fig. 13 is an elevational cross-sectional view of a steering mechanism according to an embodiment of the present invention;

FIG. 14 is a block diagram of a bellows damper assembly according to an embodiment of the present invention;

fig. 15 is a sealed cable connection assembly according to an embodiment of the present invention.

In the figure: 1-cable assembly, 2-pool surface skimmer, 3-filter cabin, 4-filter plate assembly, 5-bellows shock absorber assembly, 6-sealed cable connection assembly, 7-magnetic pump assembly, 8-outlet reversing device, 9-steering mechanism, 10-rudder plate, 11-electric cable reel, 12-electric control platform, 13-central machinery cabin, 14-balance assembly, 15-pump inlet header, 16-magnetic pump drain pipe, 17-magnetic pump inlet pipe, 18-buoyancy chamber, 19-filter cabin, 20-filter cabin outlet, 21-pool water weir, 22-filter cabin movable cover plate, 23-pump support, 24-magnetic pump, 25-magnetic pump encoder, 26-magnetic pump outlet, 27-outlet reversing speed reduction motor encoder, 28-speed reduction motor, 29-spiral lifting device, 30-limit proximity switch, 31-lifting screw, 32-piston cylinder, 33-magnetic pump drain inlet, 34-horizontal forward liquid discharge port, 35-piston, 36-static vertical liquid discharge port, 37-adjustable valve electric actuator, 38-rudder shaft, 39-elbow flange, 40-shock absorber with draft tube corrugated pipe, 41-hose connector, 42-closed rubber cable jacket, 43-cable jacket, 44-small clamp, 45-large clamp, 46-combined cable, 47-closed rubber pipe connector, 48-pressing sleeve, 49-first sealing ring, 50-female plug, 51-male socket, 52-liquid discharge hole, 53-bottom valve, and 54-second sealing ring.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 shows a mobile skimmer for a spent fuel storage pool of the invention, which mainly comprises a pool surface skimmer 2, a cable assembly 1, an electric cable drum 11 and an electric console 12.

Pool surface skimmer 2 floats in the pool, is connected with electric control platform 12 through cable assembly 1, and electric control platform 12 provides power and control command for pool surface skimmer 2. The cable assembly 1 can float on the surface of the pool, and when the pool surface skimmer 2 drags the cable to move on the pool surface, the electric cable drum 11 synchronously rotates along with the change of the moving distance of the pool surface skimmer 2 and is used for winding and unwinding the cable.

The tail end of the cable component 1 is connected to an electric console 12, and the top end is detachably connected with a magnetic pump component 7, an outlet reversing device 8 and a steering mechanism 9 in the pool surface skimmer 2 through a sealing cable connecting component 6.

As shown in fig. 2, 3, 4 and 5, the pool surface skimmer 2 of the present invention is provided, the pool surface skimmer 2 mainly includes a plurality of filtering chambers 3, a central machinery chamber 13, a balance assembly 14, a magnetic pump assembly 7 disposed in the central machinery chamber 13, an outlet reversing device 8 and a steering mechanism 9, the filtering chambers 3 are disposed on the peripheral side of the central machinery chamber 13, and the central machinery chamber 13 is a sealed structure.

The liquid outlet ends at the bottoms of the filtering cabins 3 are respectively connected with a plurality of corrugated pipe shock absorber assemblies 5, and the other ends of the corrugated pipe shock absorber assemblies 5 are connected with a pump inlet liquid collecting pipe 15 through a magnetic pump liquid inlet pipe 17; the outlet 26 of the magnetic pump is connected with the outlet reversing device 8 through the discharge pipe 16 of the magnetic pump; the outlet reversing device 8 is arranged in the center of the central mechanical cabin 13; cables connected with the magnetic pump assembly 7, the outlet reversing device 8 and the steering mechanism 9 are connected with the sealed cable connecting assembly 6 and then connected to the cable assembly 1 outside the central mechanical cabin 13; a plurality of counterbalance assemblies 14 are evenly distributed circumferentially at the top of the central machinery compartment 13 for adjusting the balance and attitude of the pool face skimmer 2 as it floats on the surface of the pool water.

As shown in fig. 6 and 7, the filter chamber 3 comprises a filter plate assembly 4, a buoyancy chamber 18, a filter chamber 19, a filter chamber liquid outlet 20, a pool water weir 21 and a filter chamber removable cover plate 22; wherein, the bottom of the filter chamber 19 is cone-shaped, and the liquid outlet 20 of the filter chamber is arranged at the cone-shaped bottom; the filtering cabin 3 is provided with a plurality of pool water weir crests 21, and the pool water weir crests 21 are immersed in the surface of pool water and are inlets for the pool water to enter the filtering cabin 3; when the pond water flows through the filter plate assembly 4, solid dirt on the surface is filtered, and filtered clear liquid flows out from a liquid outlet 20 of the filter cabin; the buoyancy chamber 18 is arranged below the filter chamber 19 (at the periphery of the bottom), and is connected by welding to ensure sealing, form a cavity and provide buoyancy; the filter chamber removable cover 22 is closed during normal operation and opened when the filter plate assembly 4 needs to be serviced and replaced.

As shown in fig. 8 and 9, the magnetic pump assembly 7 includes a pump inlet header 15, a pump support 23, a magnetic pump 24, a magnetic pump encoder 25, and a magnetic pump outlet 26 (the magnetic pump outlet 26 is provided with a magnetic pump drain pipe 16), the magnetic pump inlet pipes 17 are all connected to the pump inlet header 15 (the pump inlet header 15 is provided with a plurality of nozzles, each nozzle is provided with one magnetic pump inlet pipe 17, and each magnetic pump inlet pipe 17 is correspondingly connected to one filter chamber 3, so that the clear liquid enters the magnetic pump 24); the magnetic pump assembly 7 provides power for circulating and filtering pool water, and the magnetic pump encoder 25 adjusts hydraulic parameters and motion parameters within the working curve range of the pump; meanwhile, the outlet 26 of the magnetic pump is connected with the outlet reversing device 8, and the pump can provide power for the movement of the whole pool surface skimmer 2 when needed. The magnetic pump outlet 26 is connected to the outlet reversing device 8 through the magnetic pump discharge pipe 16, and is used for outputting the clear liquid from the magnetic pump 24 to the outlet reversing device 8.

As shown in fig. 10, 11 and 12, the outlet reversing device 8 is located at the center of the central machinery chamber 13 and comprises an outlet reversing speed reducing motor encoder 27, a speed reducing motor 28, a spiral lifting device 29, a limit proximity switch 30, a lifting screw rod 31, a piston cylinder 32, a magnetic pump liquid discharging inlet 33, a horizontal forward liquid discharging port 34, a piston 35, a static vertical liquid discharging port 36 and a bottom valve 53; a cylindrical piston cylinder 32 is vertically arranged at the center of the central machinery cabin 13, a magnetic pump liquid discharge inlet 33 connected with a magnetic pump liquid discharge pipe 16 of the magnetic pump assembly 7 is arranged on the side surface of the top end of the piston cylinder 32, a static vertical liquid discharge port 36 is arranged at the bottom end of the piston cylinder 32, a horizontal forward liquid discharge port 34 extending towards one side is arranged on the side surface of the bottom end, and the static vertical liquid discharge port 36 and the horizontal forward liquid discharge port 34 extend out of the central machinery cabin 13 and are immersed in the pool water; the top end of the piston 35 is connected with a lifting screw rod 31 extending out of the top end of the piston cylinder 32, the bottom end of the piston 35 is connected with a bottom valve 53, the piston 35 is provided with a plurality of liquid discharging holes 52 which are parallel to the axis of the piston cylinder 32 and are used for passing through clear liquid, the lifting screw rod 31 is connected with a spiral lifting device 29, the spiral lifting device 29 is connected with a speed reducing motor 28, the speed reducing motor 28 controlled by an outlet reversing speed reducing motor encoder 27 drives the spiral lifting device 29 to move, and the lifting screw rod 31, the piston 35 and the bottom valve 53 are driven to move up and down in the piston cylinder 32; the limit proximity switch 30 is used for stopping at two limit positions (a rising limit position and a descending limit position) respectively when the piston 35 moves up and down to a certain position, when the piston reaches the rising limit position upwards, the bottom valve 53 at the lower end of the piston 35 closes the static vertical liquid discharge port 36, and the horizontal forward liquid discharge port 34 is opened; when the lower limit position is reached, the second sealing rings 54 on the side and on both ends of the piston 35 close the horizontal forward drain port 34, and the stationary vertical drain port 36 is opened.

The clear liquid discharge state can be switched by controlling the opening and closing of the stationary vertical liquid discharge port 36. When the static vertical liquid outlet 36 is opened, the pond water is discharged from the static vertical liquid outlet 36 and returns to the pond without providing power in the horizontal direction; when the stationary vertical drain 36 is closed, the pool water is drained from the horizontal forward drain 34 and returned to the pool, providing horizontal power to the pool surface skimmer 2 in a direction opposite to the direction of drainage.

Therefore, the pond water sequentially flows through the filtering cabin 3 to become clear liquid, and then returns to the pond through the magnetic pump assembly 7 and the outlet reversing device 8 to complete the filtering cycle.

As shown in fig. 13, the steering mechanism 9 includes an adjustable valve electric device 37, a steering shaft 38 and a steering plate 10; the rudder shaft 38 is arranged on the adjustable valve electric device 37, the rudder plate 10 is arranged at the lower part of the rudder shaft 38, the adjustable valve electric device 37 is arranged in the central machinery compartment 13, the rudder shaft 38 extends downwards to the outside of the bottom of the central machinery compartment 13, and the rudder plate 10 is arranged outside the bottom of the central machinery compartment 13. The adjustable valve electric device 37 drives the rudder shaft 38 and the rudder plate 10 to rotate within a certain angle range, so that the steering control of the whole pool surface skimmer 2 in the horizontal moving process is realized.

As shown in fig. 14, the filter chamber 3 is connected with the magnetic pump liquid inlet pipe 17 through a sealed bellows damper assembly 5, the bellows damper assembly 5 is located between the filter chamber 3 and the central machinery chamber 13, and the bellows damper assembly 5 includes an elbow flange 39, a bellows damper with a flow guide pipe 40 and a hose connector 41 which are connected in sequence. One end of the elbow flange 39 is connected to the filter chamber outlet 20 of the filter chamber 3, and one end of the hose connector 41 is connected to the inlet pipe 17 of the magnetic pump. The bellows damper assembly 5 serves to reduce vibrations generated by motor rotation and fluid flow. The built-in draft tube with the draft tube bellows damper 40 can reduce the disturbance of the liquid flow.

As shown in fig. 15, the cable assembly 1 includes a composite cable 46 having an outer surface wrapped with a closed-cell rubber cable jacket 42; the closed-cell rubber cable jacket 42 is made of light closed-cell foam rubber, so that the cable assembly 1 can float on the surface of pool water;

the combined cable 46 comprises cables for controlling the magnetic pump assembly 7, the outlet reversing device 8 and the steering mechanism 9.

As shown in fig. 15, the sealed cable connection assembly 6 includes a cable jacket 43, a small clip 44, a large clip 45, a closed-cell rubber tube fitting 47, a compression sleeve 48, a first sealing ring 49, a female plug 50, and a male socket 51. The sealed cable connection assembly 6 provides communication between the plurality of cables in the combination cable 46 inside and outside the central machinery space 13 while ensuring a seal. The cable jacket 43 and the closed-cell rubber pipe joint 47 are sequentially arranged between the combined cable 46 and the closed-cell rubber cable jacket 42 at the top end of the cable component 1; the pressing sleeve 48 and the first sealing ring 49 are sequentially arranged between the closed-cell rubber pipe joint 47 and the combined cable 46; the female plug 50 is arranged at the top end of the combination cable 46, and the inside of the female plug 50 is connected with the combination cable 46; the small clamp 44 and the large clamp 45 are arranged outside the closed-cell rubber cable jacket 42 at the top end of the cable component 1; the male socket 51 is arranged on the side wall of the central mechanical cabin 13 of the pool surface skimmer 2 in a penetrating manner, the control cables of the magnetic pump assembly 7, the outlet reversing device 8 and the steering mechanism 9 are collected in the male socket 51, and when the female plug 50 and the male socket 51 are connected together, the electric console 12 controls the magnetic pump assembly 7, the outlet reversing device 8 and the steering mechanism 9; the small clamp 44 and the large clamp 45 tightly press and fix the closed-cell rubber pipe joint 47 between the cable jacket 43 and the closed-cell rubber cable jacket 42 to form sealing, so that pool water cannot enter between the closed-cell rubber cable jacket 42 and the combined cable 46; furthermore, a plurality of seals are formed by the first sealing ring 49 in the pressing sleeve 48 and the sealing rings at a plurality of positions in the female plug 50 and the male socket 51, so that pool water cannot enter the socket connection position.

When the mobile skimmer for the spent fuel storage pool provided by the invention is used for removing dirt on the surface of pool water, the specific operation method is as follows:

the pool surface skimmer 2 is placed in the pool water of the spent fuel storage pool, and the balance weight of each balance assembly 14 is adjusted, so that the whole pool surface skimmer 2 keeps balance, and pool water weir mouths 21 of a plurality of filter cabins 3 are just submerged below the water surface. Magnetic drive pump 24 is started through remote control, the pond water with the filth on the pond upper surface is sucked into filter cabin 3, the pond water flows through filter plate assembly 4, the filth is filtered and collected, the filtered pond water passes through bellows shock absorber assembly 5 and magnetic drive pump feed liquor pipe 17 and enters magnetic drive pump 24, and is discharged through magnetic drive pump fluid-discharge pipe 16 and enters outlet reversing device 8 through magnetic drive pump fluid-discharge inlet 33.

When the pool surface skimmer 2 filters pool water in situ, the outlet reversing device 8 is remotely controlled by the console 12, the piston 35 is stopped at the lower limit position, the horizontal forward liquid discharge port 34 is closed by two second sealing rings 54 on the side surface of the piston 35, the static vertical liquid discharge port 36 is opened, the filtered clear liquid passes through the liquid discharge holes 52 on the cross section of the piston 35 and is finally discharged to the pool by the static vertical liquid discharge port 36 without providing horizontal thrust, and the pool surface skimmer 2 keeps a static state on the pool surface to filter the pool water.

When the pool surface skimmer 2 sucks and filters pool water while moving, the outlet reversing device 8 is remotely controlled by the console 12, the piston 35 is stopped at the upper limit position, the horizontal forward liquid discharge port 34 is opened, the static vertical liquid discharge port 36 is closed, the filtered clear liquid passes through a plurality of liquid discharge holes 52 on the cross section of the piston 35 and is finally discharged to the pool through the horizontal forward liquid discharge port 34, and the horizontal forward thrust is provided for the pool surface skimmer 2; the control valve electric device 37 is adjusted through remote control, the rudder plate 10 is driven to swing left and right, and the pool surface skimmer 2 can be controlled to turn during the traveling, so that pool water can be sucked and filtered while moving, and the pool surface skimmer 2 can be moved to any position of the pool surface.

The cable assembly 1 for connecting the pool surface skimmer 2 and the shore electric control station 12 is a power supply and control cable wrapped by closed-cell foam rubber, can float on the pool surface and freely move along with the pool surface skimmer 2, and is synchronously wound and unwound by an electric cable reel 11 on the pool shore.

When the mobile skimmer for a spent fuel storage pool of the present invention is subjected to a pool water filtration operation for a certain period of time, the filter plate assembly 4 needs to be replaced. During replacement, the pool face skimmer 2 is removed from the pool water, a plurality of old filter plate assemblies 4 are respectively disassembled, a plurality of new assemblies are installed, and the old assemblies are treated as solid waste.

The device according to the present invention is not limited to the embodiments described in the specific embodiments, and those skilled in the art can derive other embodiments according to the technical solutions of the present invention, and also belong to the technical innovation scope of the present invention.

Claims (7)

1. The utility model provides a portable skimming device of spent fuel storage pond for clear away the surperficial filth of the pond of storing spent fuel, characterized by: comprises a pool surface skimmer (2) and an electric control platform (12) which are connected through a cable assembly (1); the pool surface skimmer (2) capable of floating on the water surface comprises a sealed central mechanical cabin (13) with a plurality of filtering cabins (3) arranged on the peripheral side surface, and a magnetic pump assembly (7), an outlet reversing device (8) and a steering mechanism (9) controlled by the electric control console (12) are arranged in the central mechanical cabin (13); under the action of the magnetic pump assembly (7), the surface water body of the water pool is filtered by the filtering cabin (3), the filtered clear liquid is discharged back into the water pool by the outlet reversing device (8) and is used as the power for the pool surface skimmer (2) to move horizontally on the surface of the water pool, and the steering mechanism (9) can control the direction of the horizontal movement;

the filtering chamber (3) comprises a filtering chamber (19) with a conical bottom, a filtering chamber liquid outlet (20) is arranged at the conical bottom, the filtering chamber (19) is covered by a filtering plate assembly (4) capable of being replaced quickly, a buoyancy chamber (18) is arranged at the periphery of the bottom of the filtering chamber (19), and a plurality of pool water weir ports (21) are arranged on the outer side above the filtering plate assembly (4), and a surface water body of the pool enters the filtering chamber (19) through the pool water weir ports (21) and the filtering plate assembly (4) in sequence and finally flows out of the filtering chamber (3) from the filtering chamber liquid outlet (20);

the magnetic pump assembly (7) comprises a magnetic pump (24), a magnetic pump encoder (25) for controlling the working speed of a motor of the magnetic pump (24), a pump inlet liquid collecting pipe (15) and a magnetic pump outlet (26) provided with a magnetic pump liquid discharging pipe (16), the pump inlet liquid collecting pipe (15) is provided with a plurality of pipe orifices, each pipe orifice is provided with a magnetic pump liquid inlet pipe (17), and each magnetic pump liquid inlet pipe (17) is correspondingly connected with one filter cabin (3) so that the clear liquid enters the magnetic pump (24); the outlet (26) of the magnetic pump is connected with the outlet reversing device (8) through the drain pipe (16) of the magnetic pump, and is used for outputting the clear liquid from the magnetic pump (24) to the outlet reversing device (8);

filter cabin (3) with connect through sealed bellows shock absorber subassembly (5) between magnetic drive pump feed liquor pipe (17), bellows shock absorber subassembly (5) are located filter cabin (3) with between central machinery cabin (13), including return bend flange (39), area honeycomb duct bellows shock absorber (40) and hose nipple (41) that connect gradually, the one end of return bend flange (39) is connected filter cabin (3) on filter cabin liquid outlet (20), the one end of hose nipple (41) is connected on magnetic drive pump feed liquor pipe (17).

2. The mobile skimmer for a spent fuel storage pool of claim 1, wherein: the outlet reversing device (8) is positioned at the center of the central machinery cabin (13) and comprises a cylindrical piston cylinder (32) which is vertically arranged at the center and is internally provided with a piston (35), a magnetic pump liquid drainage inlet (33) which is connected with a magnetic pump liquid drainage pipe (16) of the magnetic pump assembly (7) is arranged on the side surface of the top end of the piston cylinder (32), the bottom end of the piston cylinder (32) is a static vertical liquid drainage port (36) which extends downwards to the outside of the bottom of the central machinery cabin (13), a horizontal forward liquid drainage port (34) which extends towards one side is arranged on the side surface of the bottom end, the top end of the piston (35) is connected with a lifting screw rod (31) which extends to the outside of the top end of the piston cylinder (32), the bottom end of the piston (35) is connected with a bottom valve (53), and a plurality of outlet reversing devices which are parallel to the axis of the piston cylinder, A drain hole (52) for passing the clear liquid; the lifting screw rod type piston cylinder is characterized by further comprising a spiral lifting device (29) connected with the lifting screw rod (31) and a speed reducing motor (28) which is connected with the spiral lifting device (29) and provided with an outlet reversing speed reducing motor encoder (27), wherein the piston (35) and the bottom valve (53) can ascend or descend in the piston cylinder (32) along with the lifting screw rod (31) under the driving of the speed reducing motor (28); the lifting screw rod mechanism further comprises a limit proximity switch (30), wherein the limit proximity switch (30) is used for limiting the lifting limit position and the descending limit position of the lifting screw rod (31); when the lifting screw rod (31) is lifted to the lifting limit position, the piston (35) and the bottom valve (53) can close the static vertical liquid discharge port (36) and open the horizontal forward liquid discharge port (34) to provide power for the horizontal movement of the pool surface skimmer (2) in the filtering operation; when the lifting screw rod (31) descends to the descending limit position, the piston (35) and the bottom valve (53) can close the horizontal forward liquid outlet (34) and open the static vertical liquid outlet (36), so that the pool surface skimmer (2) is kept in a static state in the filtering operation; the outlet reversing gear motor encoder (27) is used for controlling the gear motor (28).

3. The mobile skimmer for a spent fuel storage pool of claim 2, wherein: the piston (35) is connected with the lifting screw rod (31) through a movable hinge, and the upper end and the lower end of the piston (35) are provided with two second sealing rings (54) used for sealing the horizontal advancing liquid outlet (34).

4. The mobile skimmer for a spent fuel storage pool of claim 1, wherein: the steering mechanism (9) comprises an adjustable valve electric device (37) provided with a steering shaft (38) and a steering plate (10) arranged on the steering shaft (38); the adjustable valve electric device (37) is arranged in the central machinery cabin (13), the rudder shaft (38) extends downwards to the outside of the bottom of the central machinery cabin (13), and the rudder plate (10) is positioned outside the bottom of the central machinery cabin (13); the adjusting type valve electric device (37) can drive the rudder shaft (38) to enable the rudder plate (10) to rotate, and steering control of the pool surface skimmer (2) in the horizontal moving process is achieved.

5. The mobile skimmer for a spent fuel storage pool of claim 1, wherein: the tail end of the cable assembly (1) is connected to the electric control console (12), and the top end of the cable assembly is detachably connected with the magnetic pump assembly (7), the outlet reversing device (8) and the steering mechanism (9) in the pool surface skimmer (2) through a sealing cable connecting assembly (6);

the cable assembly (1) comprises a combination cable (46) with a closed-cell rubber cable jacket (42) wrapped on the outer surface; the closed-cell rubber cable jacket (42) is made of light closed-cell foam rubber, so that the cable assembly (1) can float on the surface of pool water;

the combined cable (46) comprises cables for controlling the magnetic pump assembly (7), the outlet reversing device (8) and the steering mechanism (9);

the sealing cable connecting assembly (6) comprises a cable jacket (43) and a closed-cell rubber pipe joint (47) which are sequentially arranged between the combined cable (46) and the closed-cell rubber cable jacket (42) at the top end of the cable assembly (1), a pressing sleeve (48) and a first sealing ring (49) which are sequentially arranged between the closed-cell rubber pipe joint (47) and the combined cable (46), a female plug (50) connected with the top end of the combined cable (46), a small clamp (44) and a large clamp (45) which are arranged outside the closed-cell rubber cable jacket (42) at the top end of the cable assembly (1); the pool surface skimmer also comprises a male socket (51) matched with the female plug (50), the male socket (51) is arranged on the side wall of the central mechanical cabin (13) of the pool surface skimmer (2) in a penetrating way, and the magnetic pump assembly (7), the outlet reversing device (8) and a control cable of the steering mechanism (9) are converged into the male socket (51); when the female plug (50) and the male socket (51) are connected together, the electric console (12) controls the magnetic pump assembly (7), the outlet reversing device (8) and the steering mechanism (9);

the closed-cell rubber pipe joint (47) can block water from entering between the combined cable (46) and the closed-cell rubber cable jacket (42) under the compression action of the small clamp (44) and the large clamp (45); the first sealing ring (49) and a plurality of sealing rings arranged on the female plug (50) and the male socket (51) can prevent water from entering the joint of the female plug (50) and the male socket (51).

6. The mobile skimmer for a spent fuel storage pool of claim 1, wherein: a plurality of adjustable multi-block balance assemblies (14) are arranged above the central mechanical cabin (13) and are used for keeping the pool surface skimmer (2) balanced on the water surface.

7. The mobile skimmer for a spent fuel storage pool of claim 1, wherein: still include electric cable reel (11), automatically controlled platform (12) are fixed the bank in pond, electric cable reel (11) can be followed pond face skimmer (2) remove synchronous receive and release cable subassembly (1).

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