Negative pressure suction recovery device

Abstract

The invention relates to the technical field of pebble-bed nuclear reactors, and provides a negative pressure suction recovery device which comprises a suction assembly, a conveying driving mechanism and a driving swing mechanism, the suction assembly comprises a suction hose and a suction end, and the suction end is connected to the end of the suction hose; the conveying driving mechanism comprises a first rack and a conveying driving assembly, and the conveying driving assembly is arranged on the first rack and used for clamping and conveying the suction hose; the driving swing mechanism comprises a second rack, a driving swing assembly and a traction piece, the driving swing assembly is arranged on the second rack, one end of the traction piece is connected with the driving swing assembly, and the other end of the traction piece is connected with the suction end and used for driving the suction end to swing. According to the negative pressure suction recovery device provided by the invention, the suction end swings to disturb the fuel elements stacked to form a stable structure, and the suction end drives the suction hose to bend laterally, so that the suction end can be close to the fuel elements in a larger range on the upper surface of a pebble bed, and the recovery efficiency of the fuel elements can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of pebble bed nuclear reactors, and in particular to a negative pressure suction retrieval device. Background Art

[0002] In the fuel-related system of the pebble bed nuclear reactor, there are some containers for batch storage of fuel elements. The outer diameter of the fuel element is 60mm and the weight is about 0.2kg. A large number of fuel elements are randomly piled up into a pebble bed in the container. When the fuel elements are to be taken out of the container, a special fuel negative pressure suction device is used to take the fuel elements out of the storage tank by negative pressure suction.

[0003] In the related technology, for example, Chinese patent publication number CN102280151A provides a spent fuel negative pressure suction device for a pebble bed high temperature gas-cooled reactor, which can realize remote control of negative pressure spent fuel suction operations, effectively prevent gas leakage in the storage tank, and facilitate radiation protection during the operation to ensure the personal safety of operators.

[0004] However, when the negative pressure suction device provided by the related technology is used to suck the accumulated ball bed, the fuel elements accumulated near the pipe mouth of the suction hose may be stacked to form a stable configuration, and the fuel elements directly below the pipe mouth of the suction hose are pressed by other fuel elements on the upper and lower sides, making it impossible to suck the material; at the same time, the fuel elements on the side of the pipe mouth of the suction hose cannot roll smoothly to the pipe mouth of the suction hose, resulting in low fuel retrieval efficiency. Summary of the invention

[0005] The present invention provides a negative pressure suction retrieval device to solve the above-mentioned technical defects in the prior art. The swing of the suction end can not only disturb the fuel elements stacked to form a stable configuration, which is beneficial for some fuel elements to roll to the position of the suction end and be sucked in, but also the suction end drives the suction hose to bend laterally, which helps the suction end to approach a larger range of fuel elements on the upper surface of the ball bed, thereby improving the retrieval efficiency of the fuel elements.

[0006] The invention provides a negative pressure suction retrieval device, comprising a suction component, a conveying driving mechanism and a driving swinging mechanism.

[0007] The suction assembly comprises a suction hose and a suction end, wherein the suction end is connected to the end of the suction hose; The conveying drive mechanism comprises a first frame and a conveying drive assembly, wherein the conveying drive assembly is arranged on the first frame and is used to clamp and convey the suction hose; The driving swing mechanism includes a second frame, a driving swing assembly and a traction member, wherein the driving swing assembly is arranged on the second frame, one end of the traction member is connected to the driving swing assembly, and the other end of the traction member is connected to the suction end for driving the suction end to swing.

[0008] According to the negative pressure suction retrieval device provided by the present invention, the driving swing assembly includes a winding component and a pulley block; The winding component is arranged on the second frame; The pulley block comprises a movable pulley, a first fixed pulley and a second fixed pulley, the first fixed pulley and the second fixed pulley are both arranged on the second frame, and the movable pulley is located between the first fixed pulley and the second fixed pulley; One end of the traction member is connected to the winding member, and the other end of the traction member is wound around the first fixed pulley, the movable pulley and the second fixed pulley, and is connected to the suction end.

[0009] According to the negative pressure suction retrieval device provided by the present invention, the driving swing assembly further includes a linear driving component and a counterweight; The movable pulley is fixedly arranged on the counterweight; The linear driving component is arranged on the second frame, and is suitable for pushing the counterweight to move, so as to drive the movable pulley to move.

[0010] According to the negative pressure suction retrieval device provided by the present invention, the linear drive component includes a drive member, a guide member, a lead screw and a slider; The driving member is arranged on the second frame, the lead screw is connected to the output end of the driving member and is rotatably arranged relative to the second frame, and the guide member is arranged on the second frame and is arranged parallel to the lead screw; The slide block is in driving cooperation with the lead screw and in sliding cooperation with the guide member; the counterweight member is in sliding cooperation with the guide member and is located below the slide block.

[0011] According to the negative pressure suction retrieval device provided by the present invention, the suction hose is switched from a swinging state to a suspended state, and the pulling force on the traction member is greater than or equal to the total gravity of the counterweight and the movable pulley.

[0012] According to the negative pressure suction retrieval device provided by the present invention, the winding component includes a reel and a reel motor, the reel motor is arranged on the second frame, the reel is arranged at the output end of the reel motor, and the traction member is wound around the reel.

[0013] According to the negative pressure suction retrieval device provided by the present invention, the suction end head comprises a fixed section, a bearing and a suction nozzle, the fixed section is connected to the suction hose, the suction nozzle is connected to the fixed section through the bearing, the suction nozzle is suitable for rotating around the axis of the fixed section, and the suction nozzle is provided with an oblique opening, and the inclination angle of the oblique opening is greater than or equal to 40°; The traction member is connected to the fixing section.

[0014] According to the negative pressure suction retrieval device provided by the present invention, the traction members are provided in multiple groups, and the number of the driving swing components corresponds to the number of the traction members one by one; A plurality of groups of traction members are connected to the suction end head, and are suitable for driving the suction end head to swing in different directions.

[0015] The negative pressure suction retrieval device provided by the present invention also includes a control component and a displacement sensor, wherein the displacement sensor is electrically connected to the control component, the displacement sensor is used to detect the displacement information of the traction member, and feed the displacement information back to the control component, and the control component is used to control the movement of the driving swing component according to the displacement information.

[0016] The negative pressure suction retrieval device provided by the present invention also includes a tension sensor, which is electrically connected to the control component. The tension sensor is used to detect the tension information of the traction member and feed the tension information back to the control component. The control component is used to control the movement of the driving swing component according to the tension information.

[0017] The negative pressure suction retrieval device provided by the present invention, in addition to the suction assembly and the conveying drive mechanism, is additionally provided with a driving swing mechanism, the driving swing mechanism includes a second frame, a driving swing assembly and a traction member, the driving swing assembly is arranged on the second frame, one end of the traction member is connected to the driving swing assembly, and the other end of the traction member is connected to the suction end, which is used to drive the suction end to swing. In this way, the swinging of the suction end can not only disturb the fuel elements stacked to form a stable configuration, which is conducive to the rolling of some fuel elements to the position of the suction end to be sucked in, but also the suction end drives the suction hose to bend laterally, which helps the suction end to approach a larger range of fuel elements on the upper surface of the ball bed, thereby improving the retrieval efficiency of the fuel elements. This solves the problem in the related art that the movement of the suction hose is relatively limited and cannot be swung laterally to approach fuel elements at other positions on the upper surface of the ball bed, resulting in intermittent retrieval of fuel elements and low retrieval efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of a negative pressure suction retrieval device provided in an embodiment of the present invention.

[0020] Figure 2It is a structural schematic diagram of a driving swing mechanism in a negative pressure suction retrieval device provided in an embodiment of the present invention.

[0021] Figure 3 It is a schematic structural diagram of a suction end in a negative pressure suction retrieval device provided in an embodiment of the present invention.

[0022] Figure 4 It is a control block diagram of the negative pressure suction retrieval device provided in an embodiment of the present invention.

[0023] Reference numerals: 10. Suction assembly; 11. Suction hose; 12. Suction end; 121. Fixed section; 122. Bearing; 123. Suction nozzle; 20. Conveying drive mechanism; 21. First frame; 22. Guide tube; 30. Driving swing mechanism; 31. Second frame; 32. Driving swing assembly; 321. Winding component; 3211. Reel; 3212. Reel motor; 322. Pulley block; 3221. Moving pulley; 3222. First fixed pulley; 3223. Second fixed pulley; 323. Linear driving component; 3231. Driving member; 3232. Guide member; 3233. Lead screw; 3234. Sliding block; 324. Counterweight; 33. Traction member; 40. Storage tank. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0026] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0028] Figure 1 It is a schematic diagram of the structure of a negative pressure suction retrieval device provided in an embodiment of the present invention. Figure 2 It is a structural schematic diagram of a driving swing mechanism in a negative pressure suction retrieval device provided in an embodiment of the present invention.

[0029] See also Figure 1 and Figure 2 An embodiment of the present invention provides a negative pressure suction retrieval device, which includes a suction component 10, a conveying drive mechanism 20 and a driving swing mechanism 30.

[0030] The suction assembly 10 includes a suction hose 11 and a suction head 12, and the suction head 12 is connected to the end of the suction hose 11. The length of the suction hose 11 can be adaptively determined according to the relative position between the conveying drive mechanism 20 and the storage tank 40 to ensure that the suction hose 11 can smoothly take out the fuel element in the storage tank 40.

[0031] The conveying drive mechanism 20 includes a first frame 21, a conveying drive assembly and a guide pipe 22. The conveying drive assembly is disposed on the first frame 21 and is used to clamp and convey the suction hose 11. The guide pipe 22 is disposed on the first frame 21 and is used to guide the suction hose 11 to the storage tank 40.

[0032] Among them, the guide tube 22 can be set in one piece or in a separate piece. When the guide tube 22 is set in a separate piece, the guide tube 22 includes a loading tube and an insertion tube (not numbered in the figure). The insertion tube is obliquely converged into the loading tube. The loading tube is communicated with the insertion tube. The insertion tube guides the suction hose 11 to be inserted into the loading tube. The loading tube guides the suction hose 11 to drive the suction end 12 to extend into the storage tank 40.

[0033] The conveying drive assembly includes a conveying reduction motor and a conveying member (not shown in the figure). The conveying member clamps the suction hose 11, and the conveying reduction motor drives the conveying member to move to convey the suction hose 11, and the suction hose 11 and the suction end 12 are sent into the insertion tube, and then inserted into the storage tank 40 through the loading tube and the tank mouth of the storage tank 40, and the suction end 12 is lowered to a position close to the upper part of the ball bed.

[0034] When the negative pressure suction retrieval device is used to extract the fuel element in the storage tank 40, the storage tank 40 can be first moved to the bottom of the loading pipe, the tank mouth of the storage tank 40 is arranged vertically opposite to the loading pipe, the suction hose 11 is partially coiled on the hose turntable, and part of the suction hose 11 and the suction end 12 are placed in the insertion tube. The suction hose 11 and the suction end 12 are inserted into the storage tank 40, and the conveying drive assembly is controlled to move.

[0035] Start the fan device (such as a Roots vacuum pump) connected to the suction hose 11 to generate a large negative pressure at the suction end 12, suck the fuel element into the suction hose 11 by means of negative pressure, and then transport it to the designated position through the suction hose 11.

[0036] The driving swing mechanism 30 includes a second frame 31, a driving swing assembly 32 and a traction member 33. The driving swing assembly 32 is arranged on the second frame 31. One end of the traction member 33 is connected to the driving swing assembly 32, and the other end of the traction member 33 is connected to the suction end 12. The driving swing assembly 32 drives the traction member 33 to be retracted and released, so that the traction member 33 pulls the suction end 12 to swing, so as to disturb the fuel elements stacked to form a stable configuration, which is beneficial for some fuel elements to roll to the position of the suction end 12 and be sucked in. In addition, the suction end 12 drives the suction hose 11 to bend laterally, which helps the suction end 12 to approach a larger range of fuel elements on the upper surface of the ball bed.

[0037] It can be understood that the negative pressure suction retrieval device provided in the embodiment of the present invention, in addition to the suction assembly 10 and the conveying drive mechanism 20, is additionally provided with a driving swing mechanism 30, the driving swing mechanism 30 includes a second frame 31, a driving swing assembly 32 and a traction member 33, the driving swing assembly 32 is arranged on the second frame 31, one end of the traction member 33 is connected to the driving swing assembly 32, and the other end of the traction member 33 is connected to the suction end 12, which is used to drive the suction end 12 to swing. In this way, the swinging of the suction end 12 can not only disturb the fuel elements stacked to form a stable configuration, which is conducive to some fuel elements rolling to the position of the suction end 12 to be sucked in, but also the suction end 12 drives the suction hose 11 to bend laterally, which helps the suction end 12 to approach a larger range of fuel elements on the upper surface of the ball bed, thereby improving the retrieval efficiency of the fuel elements. This is to solve the problem in the related art that the movement of the suction hose 11 is relatively limited and cannot be swung sideways to approach the fuel elements at other positions on the upper surface of the ball bed, resulting in intermittent retrieval of the fuel elements and low retrieval efficiency.

[0038] Continue reading Figure 2 In some embodiments of the present invention, the driving swing assembly 32 includes a winding component 321 and a pulley set 322; the winding component 321 is arranged on the second frame 31; the pulley set 322 includes a movable pulley 3221, a first fixed pulley 3222 and a second fixed pulley 3223, the first fixed pulley 3222 and the second fixed pulley 3223 are both arranged on the second frame 31, and the movable pulley 3221 is located between the first fixed pulley 3222 and the second fixed pulley 3223.

[0039] One end of the traction member 33 is connected to the winding member 321 , and the other end of the traction member 33 is wound around the first fixed pulley 3222 , the movable pulley 3221 , and the second fixed pulley 3223 , and is connected to the suction end 12 .

[0040] The traction member 33 may be a steel wire rope, or may be made of carbon fiber or other materials instead of the steel wire rope, which is selected according to the use conditions.

[0041] When the suction hose 11 extends downward, the traction member 33 connected thereto is synchronously extended downward, and the winding member 321 is passively operated to synchronously release the traction member 33, so that the traction member 33 remains in a tensioned state. When the suction hose 11 is retracted upward, the traction member 33 connected thereto is synchronously moved upward to relax, and the winding member 321 is linked with the conveying drive assembly to synchronously drive the reel 3211 of the winding member 321 to rotate, so that the traction member 33 is wound on the reel 3211 of the winding member 321, thereby keeping the traction member 33 in a tensioned state.

[0042] In addition, the rotation of the winding component 321 can also actively pull the traction member 33 to drive the suction end 12 to swing, thereby disturbing the fuel elements stacked to form a stable configuration, causing some fuel elements to roll to the position of the suction end 12 and be sucked in, and the suction end 12 drives the suction hose 11 to bend laterally, which helps the suction end 12 to approach a larger range of fuel elements on the upper surface of the ball bed, thereby facilitating the extraction of the fuel elements.

[0043] Continue reading Figure 2 In some embodiments of the present invention, the driving swing assembly 32 also includes a linear driving component 323 and a counterweight 324; the rotating shaft of the movable pulley 3221 is fixed on the counterweight 3234, and the movable pulley 3221 can move linearly with the counterweight 3234; the linear driving component 323 is arranged on the second frame 31, and is suitable for pushing the counterweight 324 to move, so as to drive the movable pulley 3221 to move.

[0044] Equivalently, the linear drive component 323 can move in a straight line to drive the position of the counterweight 324 to change, thereby changing the position of the movable pulley 3221 located on the counterweight 324 to pull the traction member 33, so that the traction member 33 drives the suction hose 11 to swing, so as to disturb the fuel elements stacked to form a stable configuration.

[0045] It is understandable that in the above embodiment, the winding member 321 rotates to pull the traction member 33 to contract, driving the suction tip 12 to swing, so that the traction member 33 can move within a larger stroke range to adjust the position and swing amplitude of the suction tip 12. In other words, the winding member 321 controls the contraction of the traction member 33 to achieve rough positioning of the suction tip 12.

[0046] In this embodiment, the linear drive component 323 moves to drive the position of the counterweight 324 to change, so that the position of the movable pulley 3221 on the counterweight 324 changes, so as to pull the traction member 33 to move, drive the suction hose 11 to swing, and realize the traction member 33 to move within a smaller stroke range to adjust the position and swing amplitude of the suction end 12. In other words, the linear drive component 323 moves to drive the position of the counterweight 324 to change, so that the position of the movable pulley 3221 on the counterweight 324 changes, and the suction end 12 can be precisely positioned.

[0047] Continue reading Figure 2 In some embodiments of the present invention, the linear driving component 323 includes a driving member 3231, a guide member 3232, a lead screw 3233 and a slider 3234.

[0048] The driving member 3231 can be a motor, etc., which is fixed to the second frame 31 by bolts and other structures. The lead screw 3233 is connected to the output end of the driving member 3231 by a coupling and other structures. The lead screw 3233 is rotatably arranged with the second frame 31 through transmission components such as bearings. The guide member 3232 is fixedly arranged on the second frame 31 through a connecting seat, and the guide member 3232 is arranged parallel to the lead screw 3233.

[0049] The slider 3234 is in transmission cooperation with the lead screw 3233 , the slider 3234 is in sliding cooperation with the guide member 3232 , the counterweight 324 is in sliding cooperation with the guide member 3232 , and the counterweight 324 is located below the slider 3234 .

[0050] When the driving member 3231 runs forward, the driving slider 3234 moves downward. The slider 3234 contacts and pushes the counterweight 324 and the movable pulley 3221 to move downward, so that the traction member 33 is retracted. The traction member 33 overcomes part of the dead weight of the suction hose 11 and the suction end 12, and drives the suction hose 11 to bend laterally, so that the suction end 12 swings, disturbing the stacked fuel elements to form a stable configuration.

[0051] When the driving member 3231 operates in the reverse direction, the driving slider 3234 moves upward, and the slider 3234 separates from the counterweight 3234. The suction hose 11 and the suction tip 12 recover from the lateral bending state to the suspended state under the action of their own weight, and drive the traction member 33 to extend. The traction member 33 pulls the movable pulley 3221 and the counterweight 3234 to overcome their own weight and move upward until the suction hose 11 recovers to the suspended state, and the pulling force of the traction member 33 is reduced to balance with the self-weight of the counterweight 3234 and the movable pulley 3221.

[0052] In some embodiments of the present invention, the suction hose 11 switches from the swinging state to the hanging state, and the pulling force on the traction member 33 is greater than or equal to the total gravity of the counterweight member 324 and the movable pulley 3221. In this way, it can be ensured that the suction hose 11 can automatically recover from the lateral bending state to the hanging state under the action of its own gravity.

[0053] Continue reading Figure 2 In some embodiments of the present invention, the winding component 321 includes a reel 3211 and a reel motor 3212 , the reel motor 3212 is disposed on the second frame 31 , the reel 3211 is disposed at the output end of the reel motor 3212 , and the traction member 33 is wound around the reel 3211 .

[0054] When the suction hose 11 extends downward, the traction member 33 connected thereto is driven to extend downward, and the reel motor 3212 operates to drive the reel 3211 to rotate, and the traction member 33 is released synchronously, so that the traction member 33 remains in a tensioned state.

[0055] When the suction hose 11 is retracted upward, the traction member 33 connected thereto is driven to relax upward, and the reel motor 3212 operates to drive the reel 3211 to rotate and synchronously wind up the traction member 33, so that the traction member 33 remains in a tensioned state.

[0056] In addition, the winding component 321 can also be a winch or other structure that can extend or retract the wire rope.

[0057] Figure 3 It is a schematic structural diagram of a suction end in a negative pressure suction retrieval device provided in an embodiment of the present invention.

[0058] Continue reading Figure 2 In some embodiments of the present invention, the suction end 12 includes a fixed section 121, a bearing 122 and a suction nozzle 123. The fixed section 121 is connected to the suction hose 11. The suction nozzle 123 is connected to the fixed section 121 through the bearing 122. The suction nozzle 123 is suitable for rotating around the axis of the fixed section 121. The suction nozzle 123 can rotate flexibly around the axis of the hose. When the suction nozzle 123 contacts the fuel element, the suction nozzle 123 can passively rotate with the orientation of the fuel element, so that the fuel element can smoothly enter the suction nozzle 123, thereby improving the retrieval efficiency.

[0059] The maximum swing amplitude of the suction nozzle 123 matches the basic length of the suction hose 11, and the specific swing amplitude of the suction nozzle 123 can be flexibly changed each time, so that the suction nozzle 123 swings near the upper surface of the stacked spherical fuel elements to continuously suck fuel elements at different positions.

[0060] The suction nozzle 123 is provided with an oblique opening, the inclination angle of the oblique opening is greater than or equal to 40°, and the inclination angle of the oblique opening can be 40°, 43°, 45° or 48°, etc.; preferably, the inclination angle of the oblique opening is 45°. The traction member 33 is fixedly connected to the fixed section 121 of the suction end 12.

[0061] Continue reading Figure 2 In some embodiments of the present invention, multiple groups of traction members 33 are provided, and the number of driving swing assemblies 32 and traction members 33 corresponds one to one; multiple groups of traction members 33 are connected to the suction end 12, and are suitable for driving the suction end 12 to swing in different directions.

[0062] This is equivalent to each set of traction members 33 being connected to one side of the suction hose 11, so that the suction hose 11 can swing on the corresponding side. Multiple traction members 33 can respectively enable the suction hose 11 to swing to multiple side angles to continuously suck fuel elements at different positions, thereby improving the retrieval efficiency of the fuel elements.

[0063] Figure 4 It is a control block diagram of the negative pressure suction retrieval device provided in an embodiment of the present invention.

[0064] See also Figure 4 In some embodiments of the present invention, the negative pressure suction retrieval device also includes a control component and a displacement sensor. The displacement sensor is electrically connected to the control component. The displacement sensor is used to detect the displacement information of the traction member 33 and feed the displacement information back to the control component. The control component is used to control the movement of the swing component 32 according to the displacement information to realize the automatic control of the negative pressure suction retrieval device.

[0065] The control component may be a controller, etc. The displacement sensor includes a potentiometer displacement sensor, an inductive displacement sensor, a synchro, a capacitive displacement sensor, an eddy current displacement sensor or a Hall displacement sensor, etc.

[0066] For example, an absolute encoder or a rotary transformer is provided on the drum motor 3212 , and the displacement information of the traction member 33 is monitored according to the absolute encoder or the rotary transformer, so as to control the operation of the drum motor 3212 so that the basic length of the traction member 33 extended is synchronized with the suction hose 11 .

[0067] In some embodiments of the present invention, the negative pressure suction retrieval device also includes a tension sensor, which is electrically connected to the control component. The tension sensor is used to detect the tension information of the traction member 33 and feed the tension information back to the control component. The control component is used to control the movement of the swing component 32 according to the tension information.

[0068] This is equivalent to the control component using the tension of the traction member 33 measured by the tension sensor as feedback, which is used to control the operation of the driving member 3231 of the linear driving component 323, so that the traction member 33 is always kept in a tensioned state to prevent the traction member 33 (such as a wire rope) from being damaged by overload.

[0069] In addition, the control component controls the operation of the driving member 3231 of the linear driving member 323 to control the corresponding traction member 33 to retract or release the corresponding incremental length, and then controls the swing amplitude of the suction nozzle 123 to cooperate with the control program to realize the automatic control of the negative pressure suction retrieval device.

[0070] In addition, a sensor may be provided at the position of the suction nozzle 123. When the suction nozzle 123 extends downward to the upper surface of the stacked spherical fuel elements, the control component controls the conveying drive component to stop running, so that the suction hose 11 stops extending.

[0071] The negative pressure suction retrieval device provided in the embodiment of the present invention can be combined with corresponding analysis and testing, and an automated control program can be used to adaptively adjust the actions of each driving component to control the telescopic length of the suction hose 11 and the swing amplitude and corresponding position of the suction nozzle 123 to adapt to the different stacking heights and random stacking conditions of the ball bed in the storage tank 40, thereby achieving efficient retrieval of fuel elements.

[0072] It should be noted that the negative pressure suction retrieval device provided in the embodiment of the present invention can be provided with multiple pulleys to extend the length of the traction member 33 (such as a wire rope), thereby realizing remote control and maintenance.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A negative pressure suction retrieval device, characterized in that: include: A suction assembly, comprising a suction hose and a suction end, wherein the suction end is connected to the end of the suction hose; A conveying drive mechanism, comprising a first frame and a conveying drive assembly, wherein the conveying drive assembly is arranged on the first frame and is used to clamp and convey the suction hose; The driving swing mechanism includes a second frame, a driving swing assembly and a traction member, wherein the driving swing assembly is arranged on the second frame, one end of the traction member is connected to the driving swing assembly, and the other end of the traction member is connected to the suction end for driving the suction end to swing.

2. The negative pressure suction retrieval device according to claim 1, characterized in that: The driving swing assembly includes a winding component and a pulley block; The winding component is arranged on the second frame; The pulley block comprises a movable pulley, a first fixed pulley and a second fixed pulley, the first fixed pulley and the second fixed pulley are both arranged on the second frame, and the movable pulley is located between the first fixed pulley and the second fixed pulley; One end of the traction member is connected to the winding member, and the other end of the traction member is wound around the first fixed pulley, the movable pulley and the second fixed pulley, and is connected to the suction end.

3. The negative pressure suction retrieval device according to claim 2, characterized in that: The driving swing assembly also includes a linear driving component and a counterweight; The movable pulley is fixedly arranged on the counterweight; The linear driving component is arranged on the second frame, and is suitable for pushing the counterweight to move, so as to drive the movable pulley to move.

4. The negative pressure suction retrieval device according to claim 3, characterized in that: The linear drive component includes a driving member, a guide member, a lead screw and a slider; The driving member is arranged on the second frame, the lead screw is connected to the output end of the driving member and is rotatably arranged relative to the second frame, and the guide member is arranged on the second frame and is arranged parallel to the lead screw; The slide block is in driving cooperation with the lead screw and in sliding cooperation with the guide member; the counterweight member is in sliding cooperation with the guide member and is located below the slide block.

5. The negative pressure suction retrieval device according to claim 3, characterized in that: The suction hose switches from a swinging state to a hanging state, and the pulling force on the traction member is greater than or equal to the total gravity of the counterweight and the movable pulley.

6. The negative pressure suction retrieval device according to claim 2, characterized in that: The winding component includes a reel and a reel motor. The reel motor is arranged on the second frame, the reel is arranged on the output end of the reel motor, and the traction member is wound around the reel.

7. The negative pressure suction retrieval device according to claim 1, characterized in that: The suction end head comprises a fixed section, a bearing and a suction nozzle, wherein the fixed section is connected to the suction hose, the suction nozzle is connected to the fixed section through the bearing, the suction nozzle is suitable for rotating around the axis of the fixed section, and the suction nozzle is provided with an oblique opening, and the inclination angle of the oblique opening is greater than or equal to 40°; The traction member is connected to the fixing section.

8. The negative pressure suction retrieval device according to any one of claims 1 to 7, characterized in that: The traction members are provided in multiple groups, and the number of the driving swing assemblies corresponds to the number of the traction members one by one; A plurality of groups of traction members are connected to the suction end head, and are suitable for driving the suction end head to swing in different directions.

9. The negative pressure suction retrieval device according to any one of claims 1 to 7, characterized in that: It also includes a control component and a displacement sensor, which is electrically connected to the control component. The displacement sensor is used to detect the displacement information of the traction member and feed the displacement information back to the control component. The control component is used to control the movement of the driving swing component according to the displacement information.

10. The negative pressure suction retrieval device according to claim 9, characterized in that: It also includes a tension sensor, which is electrically connected to the control component. The tension sensor is used to detect the tension information of the traction member and feed the tension information back to the control component. The control component is used to control the movement of the driving swing component according to the tension information.

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