A lifting device and method for processing a special door of a nuclear power plant

Abstract

The application discloses a hoisting device and method for nuclear power special door machining, and belongs to the technical field of hoisting devices. The hoisting device for nuclear power special door machining comprises a hoisting structure moving along a track, and the hoisting structure comprises a portal frame arranged on the upper side of the track, walking assemblies arranged at the bottoms of the two sides of the portal frame, a hoisting part comprising a top plate and four hoisting assemblies, a cross beam fixed between the two side supports of the portal frame through connecting rods, and floating positioning assemblies arranged on the two sides of the cross beam. The elastic avoidance and reset clamping of the floating positioning assemblies on the two sides of the cross beam realize automatic introduction and lateral limiting and anti-swing in the door body ascending process. In combination with the triangular block inclined surface guidance and the swing plate linkage, the floating positioning assemblies are provided with buffer guidance and are prevented from interference when the door body is lowered. The locking of the floating positioning assemblies by the limiting assemblies makes the door body keep a stable posture in the horizontal movement process.

Description

Technical Field

[0001] This invention relates to the field of hoisting equipment technology, and in particular to a hoisting device and method for processing special doors for nuclear power plants. Background Technology

[0002] Special doors for nuclear power plants (such as shielding doors, protective doors, and biological shielding doors) are critical protective equipment for the containment vessel and important buildings of nuclear power plants. These doors are large in size, heavy in structure, and have precision-machined positioning bosses and sealing surface references on the bottom. During the workshop processing stage, these doors need to be frequently hoisted and transferred between the welding station and the gantry milling machine and assembly jig, requiring extremely high positioning accuracy and impact resistance.

[0003] Currently, the hoisting process for special doors used in nuclear power plants commonly employs a gantry crane combined with four-corner wire ropes. However, this method has several shortcomings: First, after the door is lifted horizontally, the four wire ropes only provide vertical tension, with no effective horizontal constraint. The door's multiple degrees of freedom—including translational swaying in the width direction, torsional swaying around the vertical axis, and tilting around the horizontal axis—are all uncontrolled, causing significant swaying during transport. When lowered onto the machine tool table, repeated manual pushing and pulling corrections are necessary, which is time-consuming and labor-intensive. Second, there is a lack of cushioning when the door is lowered onto the processing table, resulting in direct impact to the machine tool table, which can easily cause chipping in the machine tool's T-slots and damage to the door's reference surface. Third, existing anti-sway measures largely rely on electronic sensors and hydraulic systems, which are complex, costly, and subject to stringent reliability requirements in the nuclear environment, posing a high risk of failure. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art, and to propose a hoisting equipment and method for processing special doors for nuclear power plants.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hoisting device for processing special doors for nuclear power plants includes a hoisting structure that moves along a track, the hoisting structure comprising:

[0007] A gantry frame is installed on the upper side of the track, and both sides of the bottom of the gantry frame are equipped with traveling components that cooperate with the track;

[0008] The hoisting unit includes a top plate fixed to the gantry and four sets of hoisting components mounted on the top plate;

[0009] The crossbeam is fixed between the two side supports of the gantry frame by connecting rods to limit the placement of the gantry during hoisting;

[0010] And floating positioning components, two sets are provided and respectively set on both sides of the crossbeam, to assist the crossbeam in limiting the side walls of the door;

[0011] The crossbeam is also equipped with a limiting component for restricting the displacement of the floating positioning component, and the limiting component moves against the floating positioning component.

[0012] Preferably, the floating positioning assembly includes a mounting plate fixed to the side wall of the beam, an elastic element connected to the mounting plate, a limiting side plate fixedly connected to the elastic element, and a contact element disposed on the top of the limiting side plate and moving against the bottom wall of the beam.

[0013] Preferably, the elastic element includes a sliding block slidably disposed on the mounting plate, a first elastic telescopic rod disposed between the sliding block and the mounting plate, and a second elastic telescopic rod for connecting the sliding block and the limiting side plate, wherein the first elastic telescopic rod and the second elastic telescopic rod are arranged vertically.

[0014] The mounting plate is provided with a sliding groove for the movement of the sliding block.

[0015] Preferably, the contact element includes an abutment plate fixedly connected to the top of the limiting side plate, a force-bearing block slidably disposed within the abutment plate, and a first elastic element disposed between the abutment plate and the force-bearing block, wherein the top wall of the abutment plate is provided with a toothed groove.

[0016] Preferably, the limiting component includes a movable groove formed at the bottom of the crossbeam, a force-bearing plate slidably disposed in the movable groove, a second elastic element disposed between the inner wall of the movable groove and the force-bearing plate, an elastic telescopic member whose one end is rotatably connected to the force-bearing plate and rotatably disposed in the crossbeam via a rotating shaft, and a limiting block rotatably connected to the other end of the elastic telescopic member. The limiting block is slidably disposed in the crossbeam, and the limiting block is provided with limiting teeth that cooperate with the tooth groove.

[0017] Preferably, the elastic telescopic component includes a swing shell rotatably connected to the crossbeam via a rotating shaft, telescopic plates slidably disposed at both ends of the swing shell, and a spring disposed between the inner wall of the swing shell and the telescopic plates. The rotating shaft is provided with a first torsion spring for driving the swing shell to return to its original rotation.

[0018] One of the telescopic plates is hinged to the force-bearing plate, and the other telescopic plate is hinged to the limiting block.

[0019] Preferably, a triangular block is provided at the bottom of the limiting side plate. The triangular block has an upper inclined surface and a lower inclined surface facing the door body. A swing plate is rotatably provided on the triangular block via a rotating rod. A second torsion spring for driving the swing plate to reset rotation is provided on the rotating rod.

[0020] In the initial state where no external force is applied, the top wall of the swing plate and the upper inclined surface of the triangular block are smoothly connected and coplanar, forming a continuous guide inclined surface; at the same time, the bottom wall of the swing plate is flush with the bottom wall of the triangular block.

[0021] Preferably, the upper and lower inclined surfaces of the triangular block, as well as the swing plate, are rotatably connected by pins to rollers that move against the door.

[0022] Preferably, the walking assembly includes a base fixed to the bottom of the gantry, a plurality of wheel seats disposed on the base, a walking wheel rotatably disposed in the wheel seats via a rotating shaft, and a walking motor fixed to one of the wheel seats for driving the walking wheel to rotate.

[0023] The hoisting assembly includes a winch fixed to the top plate and a hook connected to a wire rope wound on the winch.

[0024] This invention also discloses a hoisting method for processing special doors for nuclear power plants, which, by applying the aforementioned hoisting equipment for processing special doors for nuclear power plants, includes the following steps:

[0025] S1: Connect the four corner rings of the horizontally placed door to the hooks of the four sets of hoisting components, start the winch, and the four sets of wire ropes will be wound up to lift the door off the ground and keep it in a horizontal position;

[0026] S2: As the door continues to rise, its side wall first contacts the lower slope of the triangular block at the bottom of the limiting side plate. The triangular block is subjected to force, which drives the limiting side plate to overcome the elastic force of the second elastic telescopic rod and move towards the mounting plate, making room for the door to rise. At this time, the swing plate automatically flips under the push of the door and abuts against the upper slope of the triangular block.

[0027] After the door passes the triangular block, the swing plate automatically resets under the action of the second torsion spring, restoring itself to a state where it is coplanar with the upper inclined surface of the triangular block.

[0028] The second elastic telescopic rod resets, pushing the limiting side plate back, so that its inner wall elastically abuts against the side wall of the door, thus achieving initial restriction on the horizontal torsion of the door.

[0029] S3: As the door continues to rise, its top wall abuts against the force-bearing block of the contact element, pushing the abutment plate to move upward synchronously. The first elastic telescopic rod is stretched. After the top wall of the abutment plate abuts against the bottom wall of the crossbeam, the door continues to move upward. The force-bearing block slides relative to the abutment plate and pushes the force-bearing plate in the movable groove upward. The force-bearing plate compresses the second elastic element and pushes the elastic telescopic element to swing around the pivot, causing the limiting block at the other end to move downward. The limiting teeth on the limiting block mesh with the tooth groove on the top wall of the abutment plate, locking the abutment plate in this position, thereby limiting the displacement of the limiting side plate in the length direction of the crossbeam and maintaining stable clamping of both sides of the door.

[0030] S4: Start the walking motor, and the walking component drives the gantry to move along the track. During this process, the gate is confined within the frame formed by the crossbeam and the side limit plates on both sides, so as to achieve smooth lateral movement of the gate.

[0031] S5: After the gantry crane is moved above the processing table, the winch reverses and the gantry begins to descend. In the initial stage of descent, the first elastic telescopic rod retracts to provide initial buffer for the gantry. The bottom of the triangular block first abuts against the processing table. As the gantry continues to descend, the side wall of the gantry contacts the upper inclined surface of the triangular block. The upper inclined surface of the triangular block is subjected to force, which again drives the limiting side plate to move towards the mounting plate to avoid it. The second elastic telescopic rod is compressed, forming a second buffer.

[0032] The door continues to move downwards, successively disengaging from the upper inclined surface of the triangular block and the swing plate. Finally, the bottom of the door detaches from the swing plate and falls completely onto the processing table, completing the entire hoisting process.

[0033] Compared with the prior art, the present invention provides a hoisting equipment and method for processing special doors for nuclear power plants, which has the following beneficial effects:

[0034] 1. This invention, through the coordinated operation of structures such as crossbeams, floating positioning components, limiting components, triangular blocks, and swing plates, achieves fully automated operation of the door body from rising and guiding, lateral clamping, high-position locking, lateral anti-swaying to lowering buffering and landing avoidance. Throughout the process, the triggering and resetting of each mechanism are completed by mechanical principles such as inclined plane guidance, elastic element energy storage and release, and toothed locking, without the need for sensors, controllers, or hydraulic systems. This not only reduces the manufacturing cost and maintenance complexity of the equipment, but also avoids the hidden dangers of electronic equipment being susceptible to interference and having insufficient reliability in nuclear environment processing workshops, and improves the long-term stable operation capability of the equipment under harsh working conditions.

[0035] 2. In this invention, the bottom wall of the crossbeam abuts against the top plane of the door, constraining the roll and pitch freedom of the door around the horizontal axis; the elastic reset clamping of the limiting side plates in the floating positioning components on both sides restricts the translational swing of the door in the width direction and the torsional swing around the vertical axis; the toothed locking of the abutment plate by the limiting components rigidly fixes the position of the limiting side plates, so that the door is confined within the frame formed by the crossbeam and the limiting side plates on both sides during the lateral movement stage. The synergistic effect of multiple constraints improves the stability of the door hoisting and transportation.

[0036] 3. This invention employs a dual buffering mechanism during the process of lowering the door body onto the processing table: the first elastic telescopic rod compresses and absorbs energy at the initial stage of lowering; subsequently, the bottom of the triangular block abuts against the processing table, and the second elastic telescopic rod intervenes again to buffer, further absorbing the remaining kinetic energy of the falling door body; simultaneously, the upper inclined surface of the triangular block and the swing plate play guiding and avoidance roles in sequence during the lowering of the door body, allowing the side wall of the door body to smoothly separate from the limiting side plate, avoiding hard jamming, effectively preventing rigid impact between the bottom surface of the door body and the machine tool table, and preventing damage to the door body reference surface and the machine tool.

[0037] 4. This invention automatically pushes the limiting side plate away when the triangular block is lifted, and automatically resets and clamps the limiting side plate after the door passes the triangular block. The entire process requires no manual intervention. When lowering, the upper inclined surface of the triangular block and the swing plate also automatically complete the avoidance and disengagement. This allows operators to complete the entire process of hoisting, limiting, buffering and lowering the door by only controlling the hoisting and lifting of the winch and the start and stop of the travel motor. This shortens the single hoisting cycle time, reduces the labor intensity and technical threshold of operators, and improves the overall efficiency of workshop processing and hoisting. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0039] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0040] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 ;

[0041] Figure 4 This is a schematic diagram of the structure of the floating positioning component of the present invention. Figure 1 ;

[0042] Figure 5 This is a schematic diagram of the structure of the floating positioning component of the present invention. Figure 2 ;

[0043] Figure 6 This is a schematic cross-sectional view of the beam structure of the present invention;

[0044] Figure 7 for Figure 6 Enlarged structural diagram of section A in the middle;

[0045] Figure 8 for Figure 6 Enlarged structural diagram of section B;

[0046] Figure 9 This is a schematic diagram of the structure when the force-bearing block separates from the abutment plate according to the present invention;

[0047] Figure 10 This is a schematic diagram of the structure of the swing plate after it has been flipped.

[0048] Figure 11 This is a schematic cross-sectional view of the triangular block of the present invention.

[0049] In the diagram: 1. Track; 2. Gantry frame; 3. Top plate; 4. Crossbeam; 5. Mounting plate; 501. Sliding groove; 6. Elastic element; 601. Sliding block; 602. First elastic telescopic rod; 603. Second elastic telescopic rod; 7. Limiting side plate; 8. Contact element; 801. Abutment plate; 8011. Tooth groove; 802. Force-bearing block; 803. First elastic element; 9. Movable groove; 901. Force-bearing plate; 902. Second elastic element; 903. Elastic telescopic element; 9031. Swing shell; 9032. Telescopic plate; 904. Limiting block; 10. Triangular block; 1001. Swing plate; 11. Roller; 12. Machine base; 121. Wheel seat; 122. Traveling wheel; 123. Traveling motor; 13. Winch; 131. Wire rope; 132. Hook. Detailed Implementation

[0050] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0051] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] like Figures 1 to 6 As shown, this embodiment proposes a hoisting device for processing special doors for nuclear power plants, including a hoisting structure that moves along a track 1. The hoisting structure includes a gantry frame 2, a hoisting section, a crossbeam 4, and two sets of floating positioning components.

[0053] The gantry frame 2 is positioned above the track 1, with traveling components on both sides of its bottom that cooperate with the track 1. In this embodiment, the traveling components drive the gantry frame 2 to move along the track 1, enabling the transfer of the gate body between different workstations. Specifically, the traveling components include a base 12 fixed to the bottom of the gantry frame 2, several wheel seats 121 mounted on the base 12, traveling wheels 122 rotatably mounted within the wheel seats 121 via a rotating shaft, and a traveling motor 123 fixed to one of the wheel seats 121 and used to drive the traveling wheels 122 to rotate. By driving the traveling wheels 122 to roll along the track 1 via the traveling motor 123, the gantry frame 2 and the components it carries can move smoothly along the track 1, providing basic mobility for the transfer of the gate body between storage and processing workstations.

[0054] The hoisting unit includes a top plate 3 fixed to the gantry 2 and four sets of hoisting assemblies mounted on the top plate 3. In this embodiment, the hoisting assemblies are used to lift and lower the horizontally placed nuclear power plant special door. Specifically, each hoisting assembly includes a winch 13 fixed to the top plate 3 and a hook 132 connected to the wire rope 131 wound on the winch 13. The four sets of hoisting assemblies are arranged in a rectangular shape, and their hooks 132 are respectively connected to the pre-embedded lifting rings at the four corners of the horizontally placed nuclear power plant special door. When the four winches 13 simultaneously wind up the wire rope 131, the door can be smoothly lifted off the ground and kept in a roughly horizontal position; when the winches 13 simultaneously release the wire rope 131, the door is lowered at a uniform speed.

[0055] The crossbeam 4 is fixed between the two side supports of the gantry frame 2 via connecting rods, located below the top plate 3. In this embodiment, the crossbeam 4 is used to restrict the roll and pitch freedom of the door body around the horizontal axis by abutting against the top wall of the door body after the door body is raised to the highest position, thus providing a top reference limit for the door body. At the same time, the crossbeam 4 serves as the mounting base for the floating positioning component and the limiting component, bearing and transmitting the reaction forces generated by each component during operation.

[0056] Two sets of floating positioning components are respectively installed on both sides of the crossbeam 4 to assist the crossbeam 4 in limiting the side walls of the door. Specifically, each set of floating positioning components includes a mounting plate 5 fixed to the side wall of the crossbeam 4, an elastic element 6 connected to the mounting plate 5, a limiting side plate 7 fixedly connected to the elastic element 6, and a contact element 8 located on the top of the limiting side plate 7 and moving against the bottom wall of the crossbeam 4. The floating positioning components can automatically avoid the door when it rises and automatically reset and clamp after the door crosses the limiting area, thus achieving elastic limiting of the side walls of the door.

[0057] like Figure 4 , Figure 5 and Figure 6 As shown, in a preferred embodiment, based on the above method, the elastic element 6 further includes a sliding block 601 slidably disposed on the mounting plate 5, a first elastic telescopic rod 602 disposed between the sliding block 601 and the mounting plate 5, and a second elastic telescopic rod 603 for connecting the sliding block 601 and the limiting side plate 7. The first elastic telescopic rod 602 and the second elastic telescopic rod 603 are arranged vertically, so that the elastic element 6 has elastic compensation capability in both the horizontal and vertical directions. The mounting plate 5 is provided with a sliding groove 501 for the movement of the sliding block 601, providing guidance and limiting for the sliding block 601, ensuring that the sliding block 601 slides stably along a predetermined trajectory under the action of the elastic telescopic rod.

[0058] like Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, in a preferred embodiment, based on the above method, the contact member 8 further includes an abutment plate 801 fixedly connected to the top of the limiting side plate 7, a force-receiving block 802 slidably disposed within the abutment plate 801, and a first elastic element 803 disposed between the abutment plate 801 and the force-receiving block 802. The top wall of the abutment plate 801 has a toothed groove 8011 for cooperating with the limiting component to achieve locking. When the top wall of the door pushes the force-receiving block 802, the force-receiving block 802 can slide upward relative to the abutment plate 801 and transmit the pushing force to the limiting component, triggering subsequent locking actions.

[0059] like Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, in a preferred embodiment, based on the above method, a triangular block 10 is further provided at the bottom of the limiting side plate 7. The triangular block 10 has an upper inclined surface and a lower inclined surface facing the door body. A swing plate 1001 is rotatably mounted on the triangular block 10 via a rotating rod, and a second torsion spring is provided on the rotating rod for driving the swing plate 1001 to return to its original rotation. In the initial state without external force, the top wall of the swing plate 1001 is smoothly connected to and coplanar with the upper inclined surface of the triangular block 10, forming a continuous guide inclined surface together; at the same time, the bottom wall of the swing plate 1001 is flush with the bottom wall of the triangular block 10. This allows the triangular block 10 and the swing plate 1001 to work together to guide the door body smoothly into the clamping area of ​​the limiting side plate 7 when the door body rises; when the door body is lowered, the triangular block 10 and the swing plate 1001 provide buffering and guiding for the door body to fall, avoiding jamming with the side wall of the door body and ensuring the smoothness of the door body lowering process.

[0060] Furthermore, rollers 11 that move against the door are rotatably connected to the upper and lower inclined surfaces of the triangular block 10 and the swing plate 1001 via pins. The rollers 11 convert the sliding friction between the door and the triangular block 10 and the swing plate 1001 into rolling friction, reducing the friction between the side wall of the door and the guide inclined surface, preventing scratches on the door surface, and making the door's entry and exit smoother.

[0061] The crossbeam 4 is also equipped with a limiting component to restrict the displacement of the floating positioning component. The limiting component moves against the floating positioning component. Specifically, the limiting component includes a movable groove 9 at the bottom of the crossbeam 4, a force-bearing plate 901 slidably disposed within the movable groove 9, a second elastic element 902 disposed between the inner wall of the movable groove 9 and the force-bearing plate 901, an elastic telescopic member 903 rotatably connected at one end to the force-bearing plate 901 and rotatably disposed within the crossbeam 4 via a rotating shaft, and a limiting block 904 rotatably connected to the other end of the elastic telescopic member 903. The limiting block 904 is slidably disposed within the crossbeam 4 and is provided with limiting teeth that mate with the toothed groove 8011. The limiting component can lock the position of the floating positioning component when the door rises to the highest position, rigidly fixing the clamping state of the limiting side plate 7 on the door, and ensuring the stability of the door during lateral movement.

[0062] Furthermore, the elastic telescopic component 903 includes a swing shell 9031 rotatably connected to the crossbeam 4 via a rotating shaft, telescopic plates 9032 slidably disposed at both ends of the swing shell 9031, and a spring disposed between the inner wall of the swing shell 9031 and the telescopic plates 9032. A first torsion spring for driving the swing shell 9031 to return to its original rotation is provided on the rotating shaft. One telescopic plate 9032 is hinged to the force plate 901, and the other telescopic plate 9032 is hinged to the limiting block 904. This allows the elastic telescopic component 903 to swing around the rotating shaft under the push of the force plate 901, and transmit the motion to the limiting block 904, realizing the vertical displacement of the limiting block 904. At the same time, the elasticity of the spring compensates for the length changes during the movement, ensuring the smoothness of the transmission process.

[0063] This invention also discloses a hoisting method for processing special doors for nuclear power plants, which, by applying the aforementioned hoisting equipment for processing special doors for nuclear power plants, includes the following steps:

[0064] S1: Connect the four corner rings of the horizontally placed door to the hooks 132 of the four sets of hoisting components, start the winch 13, and the four sets of wire ropes 131 are wound up to lift the door off the ground and keep it in a horizontal position.

[0065] S2: As the door continues to rise, its side wall first contacts the lower slope of the triangular block 10 at the bottom of the limiting side plate 7. The triangular block 10 is subjected to force, which drives the limiting side plate 7 to overcome the elastic force of the second elastic telescopic rod 603 and move towards the mounting plate 5, making room for the door to rise. At this time, the swing plate 1001 automatically flips under the push of the door and abuts against the upper slope of the triangular block 10.

[0066] After the door passes the triangular block 10, the swing plate 1001 automatically resets under the action of the second torsion spring, restoring itself to a state where it is coplanar with the upper inclined surface of the triangular block 10.

[0067] The second elastic telescopic rod 603 resets, pushing the limiting side plate 7 back, so that its inner side wall elastically abuts against the side wall of the door, thus achieving the initial restriction on the horizontal torsion of the door.

[0068] S3: The door continues to rise. After its top wall abuts against the force block 802 of the contact member 8, it pushes the abutment plate 801 to move upward synchronously. The first elastic telescopic rod 602 is stretched. After the top wall of the abutment plate 801 abuts against the bottom wall of the crossbeam 4, the door continues to move upward. The force block 802 slides upward relative to the abutment plate 801 and pushes the force plate 901 in the movable groove 9 upward. The force plate 901 compresses the second elastic element 902 and pushes the elastic telescopic member 903 to swing around the pivot, causing the limiting block 904 at the other end to move downward. The limiting teeth on the limiting block 904 mesh with the tooth groove 8011 on the top wall of the abutment plate 801, locking the abutment plate 801 in this position, thereby limiting the displacement of the limiting side plate 7 in the length direction of the crossbeam 4 and maintaining stable clamping of both sides of the door.

[0069] S4: Start the walking motor 123, and the walking component drives the gantry 2 to move along the track 1. During this process, the door is restricted within the frame formed by the crossbeam 4 and the two side limit plates 7, so as to achieve the smooth lateral movement of the door.

[0070] S5: After the gantry 2 moves above the processing table, the winch 13 reverses and the door begins to fall. In the initial stage of falling, the first elastic telescopic rod 602 retracts to provide initial buffer for the door. The bottom of the triangular block 10 first abuts against the processing table. As the door continues to fall, the side wall of the door contacts the upper inclined surface of the triangular block 10. The upper inclined surface of the triangular block 10 is subjected to force, which again drives the limiting side plate 7 to move towards the mounting plate 5 to avoid it. The second elastic telescopic rod 603 is compressed to form a second buffer.

[0071] The door continues to move downwards, successively disengaging from the upper inclined surface of the triangular block 10 and the swing plate 1001. Finally, the bottom of the door disengages from the swing plate 1001 and falls completely onto the processing table, completing the entire hoisting process.

[0072] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0073] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hoisting device for processing special doors for nuclear power plants, comprising a hoisting structure that moves along a track (1), characterized in that, The hoisting structure includes: A gantry frame (2) is set on the upper side of the track (1), and both sides of the bottom of the gantry frame (2) are provided with a traveling component that cooperates with the track (1); The hoisting unit includes a top plate (3) fixed on the gantry (2) and four sets of hoisting components set on the top plate (3); The crossbeam (4) is fixed between the two side supports of the gantry frame (2) by a connecting rod to limit the position of the gate during hoisting; And floating positioning components, two sets are provided and respectively set on both sides of the crossbeam (4) to assist the crossbeam (4) in limiting the two side walls of the door; The crossbeam (4) is also provided with a limiting component for restricting the displacement of the floating positioning component, and the limiting component moves against the floating positioning component.

2. The hoisting equipment for processing special doors for nuclear power plants according to claim 1, characterized in that, The floating positioning assembly includes a mounting plate (5) fixed to the side wall of the crossbeam (4), an elastic element (6) connected to the mounting plate (5), a limiting side plate (7) fixedly connected to the elastic element (6), and a contact element (8) disposed on the top of the limiting side plate (7) and moving against the bottom wall of the crossbeam (4).

3. The hoisting equipment for processing special doors for nuclear power plants according to claim 2, characterized in that, The elastic element (6) includes a sliding block (601) slidably disposed on the mounting plate (5), a first elastic telescopic rod (602) disposed between the sliding block (601) and the mounting plate (5), and a second elastic telescopic rod (603) for connecting the sliding block (601) and the limiting side plate (7), wherein the first elastic telescopic rod (602) and the second elastic telescopic rod (603) are arranged vertically; The mounting plate (5) is provided with a sliding groove (501) for the movement of the sliding block (601).

4. The hoisting equipment for processing special doors for nuclear power plants according to claim 3, characterized in that, The contact element (8) includes an abutment plate (801) fixedly connected to the top of the limiting side plate (7), a force-bearing block (802) slidably disposed in the abutment plate (801), and a first elastic element (803) disposed between the abutment plate (801) and the force-bearing block (802). The top wall of the abutment plate (801) is provided with a toothed groove (8011).

5. The hoisting equipment for processing special doors for nuclear power plants according to claim 4, characterized in that, The limiting component includes a movable groove (9) at the bottom of the crossbeam (4), a force plate (901) slidably disposed in the movable groove (9), a second elastic element (902) disposed between the inner wall of the movable groove (9) and the force plate (901), an elastic telescopic member (903) rotatably connected to the force plate (901) at one end and rotatably disposed in the crossbeam (4) via a rotating shaft, and a limiting block (904) rotatably connected to the other end of the elastic telescopic member (903). The limiting block (904) is slidably disposed in the crossbeam (4), and the limiting block (904) is provided with limiting teeth that cooperate with the tooth groove (8011).

6. The hoisting equipment for processing special doors for nuclear power plants according to claim 5, characterized in that, The elastic telescopic component (903) includes a swing shell (9031) rotatably connected to the crossbeam (4) via a rotating shaft, telescopic plates (9032) slidably disposed at both ends of the swing shell (9031), and a spring disposed between the inner wall of the swing shell (9031) and the telescopic plates (9032). A first torsion spring for driving the swing shell (9031) to reset rotation is provided on the rotating shaft. One of the telescopic plates (9032) is hinged to the force plate (901), and the other telescopic plate (9032) is hinged to the limiting block (904).

7. The hoisting equipment for processing special doors for nuclear power plants according to claim 6, characterized in that, The bottom of the limiting side plate (7) is provided with a triangular block (10), the triangular block (10) has an upper inclined surface and a lower inclined surface facing the door body, and a swing plate (1001) is rotatably provided on the triangular block (10) by a rotating rod, and a second torsion spring is provided on the rotating rod for driving the swing plate (1001) to reset rotation. In the initial state where no external force is applied, the top wall of the swing plate (1001) and the upper inclined surface of the triangular block (10) are smoothly connected and coplanar, forming a continuous guide inclined surface; at the same time, the bottom wall of the swing plate (1001) is flush with the bottom wall of the triangular block (10).

8. The hoisting equipment for processing special doors for nuclear power plants according to claim 7, characterized in that, The upper and lower inclined surfaces of the triangular block (10) and the swing plate (1001) are all rotatably connected by pins to rollers (11) that move against the door.

9. The hoisting equipment for processing special doors for nuclear power plants according to claim 8, characterized in that, The walking assembly includes a base (12) fixed at the bottom of the gantry (2), a plurality of wheel seats (121) set on the base (12), a walking wheel (122) rotatably set in the wheel seat (121) via a rotating shaft, and a walking motor (123) fixed on one of the wheel seats (121) and used to drive the walking wheel (122) to rotate. The hoisting assembly includes a winch (13) fixed on the top plate (3) and a hook (132) connected to the wire rope (131) wound on the winch (13).

10. A hoisting method for processing special doors for nuclear power plants, comprising using the hoisting equipment for processing special doors for nuclear power plants as described in claim 9, characterized in that, Includes the following steps: S1: Connect the four corner rings of the horizontally placed door to the hooks (132) of the four sets of hoisting components, start the winch (13), and the four sets of wire ropes (131) are wound up to lift the door off the ground and keep it in a horizontal position; S2: As the door continues to rise, its side wall first contacts the lower slope of the triangular block (10) at the bottom of the limiting side plate (7). The triangular block (10) is subjected to force, which drives the limiting side plate (7) to overcome the elastic force of the second elastic telescopic rod (603) and move towards the mounting plate (5) to make room for the door to rise. At this time, the swing plate (1001) automatically flips under the push of the door and comes into contact with the upper slope of the triangular block (10). After the door passes the triangular block (10), the swing plate (1001) automatically resets under the action of the second torsion spring, restoring itself to a state coplanar with the upper inclined surface of the triangular block (10); The second elastic telescopic rod (603) is reset, pushing the limiting side plate (7) back, so that its inner side wall is elastically abutting against the side wall of the door, thus achieving the initial restriction on the horizontal torsion of the door; S3: The door continues to rise, and after its top wall abuts against the force block (802) of the contact piece (8), it pushes the abutment plate (801) to move upward synchronously. The first elastic telescopic rod (602) is stretched. After the top wall of the abutment plate (801) abuts against the bottom wall of the crossbeam (4), the door continues to move upward. The force block (802) slides upward relative to the abutment plate (801) and pushes the force plate (901) in the movable groove (9) upward. The second elastic element (902) is compressed and the elastic telescopic element (903) is pushed to swing around the pivot, causing the limiting block (904) at the other end to move down. The limiting teeth on the limiting block (904) mesh with the tooth groove (8011) on the top wall of the abutment plate (801), locking the abutment plate (801) in this position, thereby limiting the displacement of the limiting side plate (7) in the length direction of the crossbeam (4) and maintaining stable clamping on both sides of the door. S4: Start the walking motor (123), and the walking component drives the gantry (2) to move along the track (1). During this process, the door is restricted within the frame formed by the crossbeam (4) and the two side limit plates (7) to achieve smooth lateral movement of the door. S5: After the gantry (2) moves above the processing table, the winch (13) reverses and the door begins to fall. In the initial stage of falling, the first elastic telescopic rod (602) retracts to provide initial buffer for the door. The bottom of the triangular block (10) first comes into contact with the processing table. As the door continues to fall, the side wall of the door contacts the upper inclined surface of the triangular block (10). The upper inclined surface of the triangular block (10) is subjected to force, which again drives the limiting side plate (7) to move towards the mounting plate (5) to avoid it. The second elastic telescopic rod (603) is compressed to form a second buffer. The door continues to move down, successively disengaging from the upper inclined surface of the triangular block (10) and the swing plate (1001). Finally, the bottom of the door disengages from the swing plate (1001) and falls completely onto the processing table, completing the entire hoisting process.

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