Nuclear power plant fuel handling grab

Abstract

The utility model discloses a kind of nuclear power plant material pouring grippers, including boom, guide frame, positioning frame, snatch and drop mechanism and lifting mechanism;The boom, guide frame and positioning frame are sequentially connected in axial direction, the snatch and drop mechanism is arranged in the guide frame, the lifting mechanism is arranged on the boom, connection and drive the snatch and drop mechanism to carry out lifting or descending movement;The guide frame includes guide main body, and the guide main body includes at least two guide rods, several guide grating plates;At least two the guide rod is separately arranged, and is connected in axial direction between the positioning frame and the boom;Several guide grating plates are distributed along the axial direction of the guide rod and are connected on at least two guide rods.The utility model's nuclear power plant material pouring gripper is used for the change of special flow resistance plug assembly or neutron source assembly on fuel assembly, accurate positioning, change efficiency is high, reduces the radiation risk caused to staff.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power plant maintenance equipment technology, and in particular to a nuclear power plant material unloading gripper. Background Technology

[0002] To withstand the irradiation test of the materials, the nuclear power plant designed a special flow-blocking plug assembly, named the Special Flow-Blocking Plug Assembly. Similar to conventional combustible poison assemblies, this assembly contains three rods of different outer diameters, and its clamping system is the same as that of the conventional M310 resistance plug assembly. The relocation and switching operations of the Special Flow-Blocking Plug Assembly and the neutron source assembly are high-risk operations, requiring extremely high standards for equipment, personnel, operational procedures, and key technologies. Therefore, all switching operations of the Special Flow-Blocking Plug Assembly and the neutron source assembly must be completed underwater.

[0003] To achieve the switching of special flow-blocking plug components and the switching of neutron source components, corresponding tools need to be designed to reduce personnel radiation risks and ensure accurate switching positioning. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a nuclear power plant material handling gripper for switching special flow-blocking plug components or neutron source components.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to provide a nuclear power plant unloading gripper for the replacement of special flow-blocking plug components or neutron source components. The nuclear power plant unloading gripper includes a lifting rod, a guide frame, a positioning frame, a gripping and releasing mechanism for gripping or releasing the replacement components, and a lifting mechanism.

[0006] The boom, guide frame and positioning frame are connected in sequence along the axial direction. The gripping and releasing mechanism is set in the guide frame. The lifting mechanism is set on the boom. It is connected to and drives the gripping and releasing mechanism to perform lifting or lowering movements to extract or insert the gripped switching component into the fuel assembly.

[0007] The guide frame includes a guide body, which includes at least two guide rods and a plurality of guide grid plates; the at least two guide rods are spaced apart and axially connected between the positioning frame and the lifting rod; the plurality of guide grid plates are distributed at intervals along the axial direction of the guide rods and pass through the at least two guide rods.

[0008] Preferably, the guide frame further includes a guide opening and closing mechanism, which includes a track group fixedly connected to the periphery of the guide body and a plurality of guide slats arranged circumferentially and slidably engaged inside the track group.

[0009] One end of the track group extends obliquely to the positioning frame, so that the end of the track group near the positioning frame is a tapered section; several sets of guide slats are respectively connected to the gripping and releasing mechanism, and slide along the track group as the gripping and releasing mechanism rises and falls; when the several sets of guide slats slide to the tapered section, they move closer to each other to form a closed state.

[0010] Preferably, the guide plate includes a guide plate and at least two guide layers spaced apart on the guide plate; the guide plate is formed by connecting at least two support plates through guide pins, and each guide layer is formed by a plurality of spaced protrusions.

[0011] Preferably, the gripping and releasing mechanism includes a bushing, a gripper head connected to the end of the bushing, and a pull rod axially passing through the bushing;

[0012] The gripper includes a gripper base and a plurality of grippers, wherein the plurality of grippers are embedded in the gripper base along the circumference of the gripper base and are hinged to the gripper base;

[0013] The end of the pull rod extends into the gripper seat, and an interference step is provided on the end. When the pull rod moves back and forth in the axial direction of the bushing relative to the gripper seat, the interference step drives the gripper to rotate relative to the gripper seat and open or close.

[0014] Preferably, the gripping and releasing mechanism further includes an operating handle and a lifting rod;

[0015] The operating handle is rotatably connected to the boom via a bracket. The operating handle is provided with a connecting rod. One end of the lifting rod is engaged with the sliding groove of the connecting rod via a pin. The other end of the lifting rod away from the operating handle is connected to the pull rod.

[0016] Preferably, the lifting mechanism includes a winch mechanism; the wire rope of the winch mechanism extends into the guide frame and connects to the gripping and releasing mechanism.

[0017] Preferably, the nuclear power plant unloading grab also includes a tension detection component, which is mounted on the wire rope of the hoisting mechanism.

[0018] Preferably, the lifting mechanism further includes a support and guide assembly; the support and guide assembly includes at least one support rod and at least one support plate, the guide rod is distributed around the bushing and passes through at least two of the guide grid plates, and the support plate is connected between the guide rod and the bushing.

[0019] Preferably, the gripping and releasing mechanism further includes a sliding plate, and the bushing and the support rod are provided with relatively communicating sliding grooves. The sliding plate passes through the sliding groove of the bushing and the sliding groove of the support rod, and is fixedly connected to the pull rod inside the bushing. The other end of the lifting rod away from the operating handle is connected to the sliding plate, and the pull rod is connected through the sliding plate.

[0020] Preferably, the positioning frame has at least one guide positioning pin on the side opposite to the guide frame for rigid positioning on the fuel assembly.

[0021] The beneficial effects of this invention are: it is used for the replacement of special flow-blocking plug components or neutron source components on fuel assemblies, with accurate positioning, high replacement efficiency, and reduced radiation risk to workers. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0023] Figure 1 This is a three-dimensional structural diagram of a nuclear power plant material handling gripper according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the guide structure in a nuclear power plant unloading gripper according to an embodiment of the present invention;

[0025] Figure 3 This is a partial structural schematic diagram of the gripping and releasing mechanism and guide frame in a nuclear power plant unloading gripper according to an embodiment of the present invention;

[0026] Figure 4 yes Figure 3 A magnified schematic diagram of the gripper head of the gripping and releasing mechanism;

[0027] Figure 5 yes Figure 4 The diagram shows the structure of the gripper head grabbing and switching component;

[0028] Figure 6 yes Figure 4 The diagram shows the structure of the grab release switching component.

[0029] Figure 7 This is a schematic diagram of the upper structure of the lifting rod in a nuclear power plant material unloading grab according to an embodiment of the present invention. Detailed Implementation

[0030] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0031] This utility model provides a nuclear power plant material handling gripper, which can be used as a tool for switching special flow-blocking plug components and neutron source components in nuclear power plants.

[0032] like Figure 1 As shown, a nuclear power plant material handling gripper according to an embodiment of the present invention includes a boom 10, a guide frame 20, a positioning frame 30, a gripping and releasing mechanism 40, and a lifting mechanism 50.

[0033] The hoist 10, guide frame 20, and positioning frame 30 are connected sequentially in the axial direction. The hoist 10 serves as the upper structure of the nuclear power plant refueling gripper, used to connect with a crane to lift or lower the entire refueling gripper. The positioning frame 30 serves as the lower structure of the nuclear power plant refueling gripper, used to engage with the top of the fuel assembly to achieve rigid positioning on the fuel assembly.

[0034] A gripping and releasing mechanism 40 is disposed in the guide frame 30 for gripping or releasing a switching assembly, wherein the switching assembly is a special flow-blocking plug assembly or a neutron source assembly. A lifting mechanism 50 is disposed on the boom 10, connected to and driving the gripping and releasing mechanism 40 to lift or lower relative to the guide frame 20, thereby extracting the gripped switching assembly from the fuel assembly or inserting it into the fuel assembly.

[0035] Specifically, the boom 10 and the guide frame 20 can be detachably connected via flanges and locking assemblies. Because the nuclear power plant's unloading grab is relatively large (including its length), the detachable connection between the boom 10 and the guide frame 20 facilitates the storage and use of the grab.

[0036] A support platform 11 may be provided at the top of the boom 10 away from the guide frame 20, and the lifting mechanism 50 may be positioned on the support platform 11. The support platform 11 is also provided with a lifting ring 12 for connecting to the crane.

[0037] The guide frame 20 includes a guide body 21, which specifically includes at least two guide rods 211 and several guide grid plates 212. The at least two guide rods 211 are spaced apart and axially connected between the positioning frame 30 and the lifting rod 10. Several guide grid plates 212 are spaced apart along the axial direction of the guide rods 211 and pass through the at least two guide rods 211, being fixedly connected to them. Each guide grid plate 212 is a plate with a hollowed-out center. The hollowed-out portions of several guide grid plates 212 are interconnected to form a central channel, within which the gripping and releasing mechanism 40 passes. Driven by the lifting mechanism 50, the gripping and releasing mechanism 40 can move back and forth within the central channel.

[0038] exist Figure 1 In the embodiment shown, the guide body 21 includes four guide rods 211, which are arranged to form a square frame. Several guide grid plates 212 are inserted between the four guide rods 211 and are located inside the four guide rods 211.

[0039] The positioning frame 30 is connected to the end of the guide rod 211. Corresponding to the four guide rods 211, the positioning frame 30 can be square and fixedly connected to the four guide rods 211. At least one guide positioning pin 31 is provided on the side of the positioning frame 30 facing away from the guide frame 20. The guide positioning pin 31 is used to cooperate with the upper pipe seat of the fuel assembly and is rigidly positioned on the fuel assembly.

[0040] The guide frame 20 may further include a guide opening and closing mechanism 22, which further includes a track assembly 221 fixedly connected to the periphery of the guide body 21, and several sets of guide rails 222 arranged circumferentially and slidably fitted inside the track assembly 221. The track assembly 221 includes several tracks, which are distributed circumferentially around the guide body 21, surrounding it and fixedly connected to it via connecting rings 223, thus being relatively fixed to the guide body 21. Each track extends along the length of the guide body 21, so the track assembly 221 can be fixedly connected to the periphery of the guide body 21 via several spaced-apart connecting rings 223 to form a stable connection with the guide body 21. The guide rails 222 fit on the side of the track assembly 221 facing the inside of the guide body 21 and can slide back and forth along the length of the track assembly 221. Furthermore, each set of guide rails 222 is offset from the guide rods 211 of the guide body 21, so that the guide rail 222 is positioned between two adjacent guide rods 211.

[0041] To ensure the balanced and stable sliding of the guide rails 222, each set of guide rails 222 is fitted onto two adjacent, spaced-apart tracks. In an embodiment where the guide body includes four guide rods 211, the track set 221 includes eight tracks, with each pair of tracks forming a group. The four groups of tracks are located on the four faces of the guide body 21, with each group of tracks positioned between two guide rods 211. Correspondingly, each group of tracks is fitted with one set of guide rails 222, so each group of guide rails 222 is also located on one face of the guide body 21, positioned between two guide rods 211 on its respective face.

[0042] Furthermore, on the outside of the guide body 21, each track of the track group 221 extends obliquely towards the positioning frame 30, connecting to the positioning frame 30, so that the end of the track group 221 near the positioning frame 30 is a tapered section 221a. Each group of guide strands 222 slides along the track. When they slide to the tapered section 221a and along it to approach the positioning frame 30, the distance between all the guide strands 222 gradually decreases, and they move closer together to form a closed state. When the guide strands 222 slide along the track away from the positioning frame 30, the guide strands 222 move away from each other, changing from a closed state to an open state.

[0043] Several sets of guide channels 222 are connected to the gripping and releasing mechanism 40, allowing the guide channels 222 to slide along the track group 221 as the gripping and releasing mechanism 40 rises and falls. When the gripping and releasing mechanism 40 moves relative to the guide body 21 towards the direction of inserting the fuel assembly, it drives the guide channels 222 to move along the track away from the positioning frame 30, thus opening the guide channels 222. When the gripping and releasing mechanism 40 moves relative to the guide body 21 towards the direction of withdrawing the fuel assembly, it drives the guide channels 222 to move along the track towards the positioning frame 30, thus closing the guide channels 222. In this way, after the gripping and releasing mechanism 40 grips the switching assembly and moves into the guide body 21, the guide channels 222 slide to the vicinity of the positioning frame 30 and form a closed state to prevent the switching assembly from falling out.

[0044] Each guide sluice 222 can be connected to the gripping and releasing mechanism 40 via a steel wire rope. One end of the steel wire rope is connected to the guide sluice 222, and the other end can be deflected by passing around a pulley block fixed on the guide body 21 before being connected to the gripping and releasing mechanism 40. The gripping and releasing mechanism 40 may be equipped with a traction mechanism to connect the steel wire rope.

[0045] Understandably, the track assembly 221 is positioned around the guide body 21, and its length does not need to be equivalent to the length of the guide body 21; it is mainly located around the lower end of the guide body 21.

[0046] As an option, combine Figure 1 and Figure 2 Each guide rail assembly 222 may include a guide plate 2220 and at least two guide layers 2221 spaced apart on the guide plate 2220. The guide rail assembly 222 is fitted onto the track via the guide plate 2220, which is formed by connecting at least two support plates via guide pins, allowing the guide plate 2220 to be deformable and slide along the tapered section 221a of the track assembly 221. Each guide layer 2221 is formed by a plurality of spaced-apart protrusions. Figure 2 An embodiment of the guide channel 222 is shown. The guide channel 222 includes three guide layers 2221. The guide plate 2220 is formed by two support plates connected by guide pins. One support plate has one guide layer 2221 and the other support plate has two guide layers 2221, so that the three guide layers 2221 are respectively located at the upper, middle and lower positions on the guide plate 2220.

[0047] refer to Figure 1 , Figure 3 and Figure 4 The gripping and releasing mechanism 40 may include a spindle 48, a bushing 41 axially connected to the spindle 48, a gripper head 42 connected to the end of the bushing 41, and a pull rod 43 axially inserted inside the bushing 41. The bushing 41 is used to connect with the lifting mechanism 50; the pull rod 43 can move back and forth axially inside the bushing 41, driving the gripper head 42 to open and close to grip or release the switching component.

[0048] exist Figure 4 In the illustrated embodiment, the gripper 42 includes a gripper base 421 and a plurality of grippers 422. The grippers 422 are circumferentially embedded in the gripper base 421 and hinged to it. The grippers 422 can rotate relative to the gripper base 421 towards the inside or outside of the gripper base 421 to open and close. The end of the pull rod 43 extends into the gripper base 421, and an interference step 431 is provided on this end. When the pull rod 43 moves back and forth relative to the gripper base 421 in the axial direction of the bushing 41, the interference step 431 drives the grippers 422 to rotate relative to the gripper base 421 to open or close.

[0049] When gripping the switching component, the gripping and releasing mechanism 40 inserts the gripper head 42 into the central cylinder 100 of the switching component until the hook of the gripper 422 corresponds to the groove in the central cylinder 100. The pull rod 43 moves downward, causing the interference step 431 to move down and position itself at the hook of the gripper 422. This drives the gripper 422 to rotate outward relative to the gripper head seat 421, causing the hook to engage in the groove in the central cylinder 100, thus gripping the switching component. At this point, the gripped switching component can be lifted by raising the gripping and releasing mechanism 40. Figure 5 As shown. Upon release, the lever 43 moves upward away from the hook of the gripper 422, causing the gripper 422 to rotate relative to the gripper head seat 421 and return to its original position, disengaging from the groove in the central cylinder 100. At this time, the gripper head 42 can be pulled out of the central cylinder 100 of the switching assembly by lifting the gripping and releasing mechanism 40, as shown. Figure 6 As shown.

[0050] Combination Figure 1 , Figure 3 and Figure 7 The gripping and releasing mechanism 40 also includes an operating handle 44 and a lifting rod 45. The operating handle 44 is rotatably connected to the boom 10 via a bracket. The operating handle 44 is provided with a connecting rod 441. One end of the lifting rod 45 is engaged with the sliding groove of the connecting rod 441 via a pin. The other end of the lifting rod 45 away from the operating handle 44 is connected to a pull rod 43.

[0051] The boom 10 is also equipped with a locking seat 46, and the operating handle 44 is connected to the locking seat 46 via a locking shaft 442. The locking seat 46 has a locking groove 461 arranged along the rotation path of the operating handle 44. The two ends of the locking groove 461 have two locking positions at different heights, respectively used to engage the locking shaft 442 and lock the operating handle 44 in two different states. When the locking shaft 442 of the operating handle 44 is in the lower locking position, such as... Figure 7In the indicated state, the pull rod 43 extends into the gripper head 42 and interferes with the gripper 422. In this state, the gripper head 42 can grip the switching assembly. When the operating handle 44 rotates, causing its locking shaft 442 to be in the higher locked position, the operating handle 44 drives the lifting rod 45 and the pull rod 43 to rise through the connecting rod 441. The pull rod 43 moves upward relative to the gripper head 42, releasing the interference with the gripper 422. In this state, the gripper head 42 can be pulled out of the switching assembly.

[0052] The lifting mechanism 50 includes a hoisting mechanism 51; the hoisting mechanism 51 includes a drum, a wire rope wound on the drum, a drive motor, and a gearbox, etc.; the output end of the drive motor is connected to the drum through the gearbox, driving the drum to rotate and winding up and unwinding the wire rope. The wire rope of the hoisting mechanism 51 extends into the guide frame 20 and connects to the spindle 48 of the gripping mechanism 40. When the drive motor is working, it drives the drum to rotate forward and backward through the gearbox, winding up and unwinding the wire rope, thereby driving the gripping mechanism 40 to move up and down within the guide frame 20.

[0053] The nuclear power plant refueling grab also includes a tension detection component (not shown), which is installed on the wire rope of the hoisting mechanism 51. By detecting changes in the tension of the wire rope, the weight of the grabbing mechanism is obtained, and then it is determined whether the grabbing mechanism 40 should grab the refueling assembly. The tension detection component may include, but is not limited to, a tension sensor.

[0054] Furthermore, combined Figure 1 , Figure 3 , Figure 4 and Figure 7 The lifting mechanism 50 may further include a support guide assembly. The support guide assembly includes at least one support rod 52 and at least one support plate 53. The support rod 52 is distributed around the periphery of the bushing 41 and passes through at least two guide plates 212; the support plate 53 is connected between the support rod 52 and the bushing 41, and the three are relatively fixed. The wire rope of the hoisting mechanism 51 may also be connected to the support guide assembly, driving the support guide assembly to move up and down with the gripping and releasing mechanism 40.

[0055] In conjunction with the support and guide assembly, the gripping and releasing mechanism 40 also includes a slide plate 47. The bushing 41 and support rod 52 have communicating sliding grooves. The slide plate 47 passes through the sliding grooves of the bushing 41 and support rod 52, and is fixedly connected to the pull rod 43 inside the bushing 41. The other end of the lifting rod 45, away from the operating handle 44, can be connected to the slide plate 47, and the pull rod 43 is connected via the slide plate 47. When the operating handle 44 is activated, the lifting rod 45 and the slide plate 47 drive the pull rod 43 to move axially within the bushing 41, thereby causing the gripper head 42 to open and close.

[0056] During the refueling operation of this utility model's nuclear power plant refueling grabber, a special flow-blocking plug assembly is extracted from the fuel assembly and then inserted into the special flow-blocking plug assembly storage rack, or the special flow-blocking plug assembly is extracted from the special flow-blocking plug storage rack and then inserted into the spent fuel assembly. During the refueling overhaul and related component replacement process, the neutron source assembly is replaced.

[0057] The nuclear power plant unloading grab of this utility model can be used in conjunction with the spent fuel pool crane above the spent fuel storage pool. The nuclear power plant unloading grab is hung on the hook of the spent fuel pool crane, and through the operation of the crane and the movement of the lifting mechanism, it can be positioned above any storage compartment of the spent fuel storage grid.

[0058] Operators operate the crane from its suspended platform in the spent fuel pool. In the nuclear power plant's refueling grabber, lifting is electrically operated, while grabbing and releasing are manually operated.

[0059] In one operational embodiment, the nuclear power plant refueling grabber is positioned on the upper tube seat of the fuel assembly via a positioning frame 30. After the guide positioning pin 31 of the positioning frame 30 mates with the pin hole on the upper tube seat, the nuclear power plant refueling grabber is positioned directly above the fuel assembly. The grabbing and releasing mechanism 40 is lowered by the lifting mechanism 50, causing the grabbing head 42 at the end of the grabbing and releasing mechanism 40 to insert into a special flow-blocking plug assembly or a neutron source assembly. Then, the movement of the pull rod 43 is controlled by the operating handle 44, causing the grabbing head 42 to grab the special flow-blocking plug assembly or the neutron source assembly. The grabbing and releasing mechanism 40 is then raised by the lifting mechanism 50, extracting the special flow-blocking plug assembly or the neutron source assembly from the fuel assembly. Simultaneously with the raising of the grabbing and releasing mechanism 40, the guide rail 222 on the guide frame 20 moves along the track assembly 221 and forms a closed state, i.e., closed below the special flow-blocking plug assembly or the neutron source assembly, preventing the special flow-blocking plug assembly or the neutron source assembly from falling out. The lifting and lowering process of the gripping and releasing mechanism 40 is also guided by the guide grid plate 212 to ensure smooth lifting and lowering of the components and avoid collision damage to the rod bundle.

[0060] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A material handling gripper for nuclear power plants, characterized in that, For switching special flow-blocking plug assemblies or neutron source assemblies, the nuclear power plant material handling gripper includes a boom, a guide frame, a positioning frame, a gripping and releasing mechanism for gripping or releasing the switching assembly, and a lifting mechanism. The boom, guide frame and positioning frame are connected in sequence along the axial direction. The gripping and releasing mechanism is set in the guide frame. The lifting mechanism is set on the boom. It is connected to and drives the gripping and releasing mechanism to perform lifting or lowering movements to extract or insert the gripped switching component into the fuel assembly. The guide frame includes a guide body, which includes at least two guide rods and a plurality of guide grid plates; the at least two guide rods are spaced apart and axially connected between the positioning frame and the lifting rod; the plurality of guide grid plates are distributed at intervals along the axial direction of the guide rods and pass through the at least two guide rods.

2. The nuclear power plant material handling gripper according to claim 1, characterized in that, The guide frame also includes a guide opening and closing mechanism, which includes a track group fixedly connected to the periphery of the guide body and several sets of guide rails arranged circumferentially and slidably engaged inside the track group. One end of the track group extends obliquely to the positioning frame, so that the end of the track group near the positioning frame is a tapered section; several sets of guide slats are respectively connected to the gripping and releasing mechanism, and slide along the track group as the gripping and releasing mechanism rises and falls; when the several sets of guide slats slide to the tapered section, they move closer to each other to form a closed state.

3. The nuclear power plant material handling gripper according to claim 2, characterized in that, The guide plate includes a guide plate and at least two guide layers spaced apart on the guide plate; the guide plate is formed by connecting at least two support plates through guide pins, and each guide layer is formed by a number of spaced protrusions.

4. The nuclear power plant material handling gripper according to claim 1, characterized in that, The gripping and releasing mechanism includes a bushing, a gripper head connected to the end of the bushing, and a pull rod axially passing through the bushing; The gripper includes a gripper base and a plurality of grippers, wherein the plurality of grippers are embedded in the gripper base along the circumference of the gripper base and are hinged to the gripper base; The end of the pull rod extends into the gripper seat, and an interference step is provided on the end. When the pull rod moves back and forth in the axial direction of the bushing relative to the gripper seat, the interference step drives the gripper to rotate relative to the gripper seat and open or close.

5. The nuclear power plant material handling gripper according to claim 4, characterized in that, The gripping and releasing mechanism also includes an operating handle and a lifting rod; The operating handle is rotatably connected to the boom via a bracket. The operating handle is provided with a connecting rod. One end of the lifting rod is engaged with the sliding groove of the connecting rod via a pin. The other end of the lifting rod away from the operating handle is connected to the pull rod.

6. The nuclear power plant material handling gripper according to claim 5, characterized in that, The lifting mechanism includes a winch mechanism; the wire rope of the winch mechanism extends into the guide frame and connects to the gripping and releasing mechanism.

7. The nuclear power plant material handling gripper according to claim 6, characterized in that, The nuclear power plant unloading grab also includes a tension detection component, which is installed on the wire rope of the hoisting mechanism.

8. The nuclear power plant material handling gripper according to claim 6, characterized in that, The lifting mechanism further includes a support and guide assembly; the support and guide assembly includes at least one support rod and at least one support plate, the guide rod is distributed around the bushing and passes through at least two of the guide grid plates, and the support plate is connected between the guide rod and the bushing.

9. The nuclear power plant material handling gripper according to claim 8, characterized in that, The gripping and releasing mechanism also includes a sliding plate. The bushing and the support rod are provided with relatively connected sliding grooves. The sliding plate passes through the sliding grooves of the bushing and the support rod and is fixedly connected to the pull rod inside the bushing. The other end of the lifting rod away from the operating handle is connected to the sliding plate and the pull rod is connected through the sliding plate.

10. The nuclear power plant material handling gripper according to any one of claims 1-9, characterized in that, The positioning frame is provided with at least one guide positioning pin on the side opposite to the guide frame for rigid positioning on the fuel assembly.

Images