Hoisting apparatus for air filter device for nuclear power

Abstract

The application relates to a hoisting device for an air filter device for nuclear power, which comprises a frame body and a hanging assembly, the hanging assembly comprises a hook and a limiting mechanism, the limiting mechanism comprises a shell, a first limiting plate, a second limiting plate and a transmission wheel assembly arranged in the shell, the shell is further provided with a clearance hole and a limiting hole; one end of the first limiting plate extends out of the shell through the clearance hole and is connected with the hook, the opening of the hook is arranged on the side facing the limiting hole; one end of the second limiting plate is arranged corresponding to the limiting hole; the transmission wheel assembly is engagedly connected with the first limiting plate and the second limiting plate; when the air filter device is hung on the hook, the first limiting plate slides downward relative to the shell, and the second limiting plate is driven to slide downward relative to the shell by the transmission wheel assembly, so that the second limiting plate limits the air filter device from being separated from the hook. The application aims to solve the problem that the hook in the existing hoisting tool is easy to be separated from the air filter device.

Description

Technical Field

[0001] This application relates to the field of nuclear power technology, and in particular to a hoisting device for an air filtration device used in nuclear power plants. Background Technology

[0002] Iodine adsorbers are commonly used air filtration equipment in nuclear power plants. The filter element is the key component in these systems, and it needs to be replaced when the filtration efficiency is low or the pressure differential is large. However, a single iodine adsorber filter element can weigh over 80 kg, requiring two people to operate simultaneously during disassembly or installation to remove the old element and install the new one. In related technologies, the hooks in the lifting tools are not properly secured to the lifting rings. Because the hook openings are not protected, the filter element may sway during movement, potentially causing the hook to detach from the ring and fall, posing a safety hazard. Utility Model Content

[0003] This application provides a hoisting device for air filtration devices used in nuclear power plants to solve the problem that hooks in existing hoisting tools are prone to detaching from the air filtration device.

[0004] In a first aspect, this application provides a hoisting device for an air filtration unit used in nuclear power plants, comprising: a frame and a hanging assembly disposed on the frame, the hanging assembly including a hook and a limiting mechanism, the limiting mechanism including:

[0005] The housing is connected to the frame, and the housing has an internal cavity. The bottom of the housing also has a clearance hole and a limiting hole that communicate with the cavity.

[0006] A first limiting plate is slidably disposed in the receiving cavity. One end of the first limiting plate extends out of the outer side of the housing through the clearance hole and is connected to the hook. The opening of the hook is arranged facing the side of the limiting hole.

[0007] The second limiting plate is slidably disposed in the receiving cavity and is arranged opposite to the first limiting plate, with one end of the second limiting plate corresponding to the limiting hole;

[0008] A transmission wheel assembly is disposed within the receiving cavity, and the transmission wheel assembly is respectively engaged and connected with the first limiting plate and the second limiting plate;

[0009] When the air filter is hung on the hook, the gravity of the air filter drives the first limiting plate to slide down relative to the housing, and drives the second limiting plate to slide down relative to the housing through the transmission wheel set, so that the second limiting plate extends out of the housing through the limiting hole and restricts the air filter from separating from the hook.

[0010] In one embodiment of this application, the drive wheel assembly includes:

[0011] A first gear is rotatably disposed in the receiving cavity and meshes with the first limiting plate.

[0012] The second gear is located on the side of the first gear away from the first limiting plate and meshes with the first gear.

[0013] The third gear is coaxially arranged with the second gear, and the third gear is meshed with the second limiting plate.

[0014] In one embodiment of this application, the transmission ratio between the first gear, the second gear, and the third gear is 1:0.5:1.

[0015] In one embodiment of this application, the limiting mechanism further includes a fixed plate and an elastic member. The fixed plate is located at the top of the wheel assembly. An extension plate is formed at the end of the first limiting plate away from the hook. The extension plate extends above the fixed plate. The two ends of the elastic member elastically abut against the fixed plate and the extension plate, respectively.

[0016] When the air filter is attached to the hook, the elastic element is compressed; when the air filter is separated from the hook, the elastic element is released elastically.

[0017] In one embodiment of this application, a guide structure is provided between the housing and the first limiting plate, and between the housing and the second limiting plate, the guide structure being used to guide the first limiting plate and the second limiting plate to slide.

[0018] In one embodiment of this application, the guiding structure includes:

[0019] A first guide rod and a second guide rod are respectively disposed on opposite sides of the receiving cavity. The first limiting plate is provided with a first guide hole, and the second limiting plate is provided with a second guide hole. The first guide rod passes through the first guide hole, and the second guide rod passes through the second guide hole.

[0020] In one embodiment of this application, a first adjustment mechanism is further included, wherein the hanging components are provided at both ends of the first adjustment mechanism along its length, and the first adjustment mechanism can drive the two hanging components to move closer to or further away from each other.

[0021] In one embodiment of this application, a second adjustment mechanism is further included. The second adjustment mechanism is disposed on the frame and extends horizontally. The first adjustment mechanism is connected to the second adjustment mechanism, and the second adjustment mechanism is used to adjust the position of the first adjustment mechanism.

[0022] In one embodiment of this application, a lifting mechanism is further included, which is disposed on the frame, and the second adjusting mechanism is connected to the lifting mechanism, which is used to adjust the height of the second adjusting mechanism.

[0023] In one embodiment of this application, a roller assembly is further included, which is connected to the bottom of the frame and is used to drive the frame to move.

[0024] The technical solution provided in this application has the following advantages compared with the prior art:

[0025] In the technical solution of this application, the hoisting equipment is connected to the air filter device via a hanging assembly. When the hanging assembly is connected to the air filter device, the limiting mechanism in the hanging assembly can achieve a dynamic locking function for the air filter device. The frame serves as an integral support structure, and the hooks in the hook assembly directly support the air filter device. The housing provides installation space for the first limiting plate, the second limiting plate, and the transmission wheel assembly. When the air filter device is hung on the hook, under the action of the air filter device's gravity, the first limiting plate is driven to slide down relative to the housing. At this time, the first limiting plate drives the second limiting plate to slide down relative to the housing via the transmission wheel assembly, allowing the second limiting plate to extend out of the housing through the limiting hole. Since the distance the second limiting plate slides down relative to the housing is greater than the distance the first limiting plate slides down relative to the housing, the second limiting plate can block and cover the opening of the hook located at the end of the first limiting plate, thereby preventing the lifting ring of the air filter device from detaching from the opening area of ​​the hook due to shaking of the air filter device during the process of moving the air filter device via the hoisting equipment. In this application, automatic protection is achieved through the mechanical linkage of the limiting mechanism. The air filter device itself is used as the driving force, without the need for an additional power source. The meshing connection of the transmission wheel assembly realizes the transmission of force and displacement amplification, and achieves self-locking of the opening area of ​​the hook. This allows the hook to automatically form protection when hanging objects, ensuring normal hook attachment and effectively eliminating the risk of falling off due to shaking. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0029] Figure 1 A schematic diagram of the structure of a hoisting device for an air filtration device for nuclear power plants, provided in an embodiment of this application;

[0030] Figure 2 for Figure 1 Structural diagram of the central frame and lifting mechanism;

[0031] Figure 3 This is a schematic diagram of the second adjustment mechanism;

[0032] Figure 4 This is a schematic diagram of the structure of the first adjustment mechanism and the hanging assembly;

[0033] Figure 5 This is a schematic diagram showing the connection between the limiting mechanism and the hook;

[0034] Figure 6 This is a schematic diagram of the internal structure of the limiting mechanism;

[0035] Figure 7 This is a schematic diagram of the structure of the first limiting plate;

[0036] Figure 8 This is a schematic diagram of the second limiting plate.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100. Lifting equipment; 10. Frame; 11. Support column; 111. Slide groove; 13. Crossbeam; 15. Base; 16. Roller assembly; 20. Hanging assembly; 21. Hook; 23. Limiting mechanism; 231. Housing; 2311. Receiving cavity; 2312. Clearance hole; 2313. Limiting hole; 232. First limiting plate; 2321. First guide hole; 2322. Extension plate; 233. Second limiting plate; 2331. Second guide hole; 235. Transmission wheel assembly; 2351. First gear; 2352. Second gear ; 2353, Third gear; 234, Fixed plate; 235, Elastic element; 236, First guide rod; 237, Second guide rod; 30, First adjusting mechanism; 31, First slide rail; 33, First limiting plate; 35, First slider; 37, Adjusting handle; 40, Second adjusting mechanism; 41, Second slide rail; 43, Second limiting rod; 45, Second slider; 50, Lifting mechanism; 51, Screw; 52, Sprocket; 53, Chain; 54, Worm gear; 55, Fixed frame; 56, Drive shaft; 57, Worm; 58, Drive component. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0041] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0042] Iodine adsorbers are commonly used air filtration equipment in the nuclear power industry. The filter element in an iodine adsorber is an air filtration device, which typically weighs over 80 kg. In existing technology, replacing the filter element in an iodine adsorber at a nuclear power plant requires two people to operate a lifting tool. The hook of the lifting tool connects to a lifting ring fixed to the top of the filter element to raise it to a preset height for easy replacement. However, the hook opening of traditional lifting tools lacks a protective structure. During movement, the filter element may sway, easily causing the lifting ring to detach from the hook, resulting in the filter element falling and being damaged.

[0043] To address the aforementioned problems, this application provides a hoisting device 100 for an air filtration unit used in nuclear power plants. Firstly, Figures 1 to 8A hoisting device 100 for an air filtration device used in nuclear power plants, provided in this application embodiment, includes a frame 10 and a hanging assembly 20 disposed on the frame 10. The hanging assembly 20 includes a hook 21 and a limiting mechanism 23. The limiting mechanism 23 includes a housing 231, a first limiting plate 232, a second limiting plate 233, and a transmission wheel assembly 235. The housing 231 is connected to the frame 10 and has an internal receiving cavity 2311. A clearance hole 2312 and a limiting hole 2313 are opened at the bottom. The first limiting plate 232 is slidably disposed within the receiving cavity 2311, with one end passing through the clearance hole 2312 and connecting to the hook 21. The opening of the hook 21 faces the limiting hole 2313. The second limiting plate 233 is disposed opposite to the first limiting plate 232, with its end corresponding to the position of the limiting hole 2313. The transmission wheel assembly 235 is installed within the receiving cavity 2311 and engages with the two limiting plates respectively. When the air filter is suspended, its gravity drives the first limiting plate 232 to move downward, and through the transmission wheel assembly 235, it drives the second limiting plate 233 to extend out of the limiting hole 2313 with a greater stroke, thus blocking the opening of the hook 21.

[0044] See Figures 5 to 8 The transmission wheel assembly 235 refers to a multi-gear meshing mechanism, specifically a three-stage gear set to achieve motion transmission and displacement amplification. The opposing surfaces of the first limiting plate 232 and the second limiting plate have gear teeth that mesh with the transmission wheel assembly 235. The first gear 2351 meshes with the rack of the first limiting plate 232, the second gear 2352 acts as an intermediate gear to change the transmission direction, and the third gear 2353 meshes with the rack of the second limiting plate 233. The stroke of the second limiting plate 233 can be precisely controlled by different module gear combinations.

[0045] The housing 231 serves as a load-bearing structure, providing installation space for the first limiting plate 232, the second limiting plate, and the transmission wheel assembly 235. Specifically, the housing 231 is generally cuboid in shape, and can be constructed from welded steel plates to form a box, ensuring sufficient strength. The clearance hole 2312 and the limiting hole 2313 can both be located at the bottom of the housing 231, and are spaced apart at both ends along the length of the housing 231. A pull ring is also provided at the top of the housing 231, allowing the entire housing 231 to be fixed to the frame 10 via cables or other structures. Specifically, the pull ring is located on the centerline of the housing 231.

[0046] The cross-sections of the first limiting plate 232 and the second limiting plate 233 are square or rectangular to ensure their strength and facilitate the machining of rack structures within them. The first and second limiting plates 232 and 233 are specifically distributed at both ends of the length of the housing 231, corresponding to the clearance hole 2312 and the limiting hole 2313, respectively. When the operator connects the lifting ring of the air filter to the hook 21, the weight of the air filter causes the first limiting plate 232 to slide down relative to the housing 231. The rack of the first limiting plate 232 drives the first gear 2351 to rotate, which is then transmitted through the second gear 2352 to the third gear 2353, causing the rack of the second limiting plate 233 to slide downwards relative to the housing 231. Due to the gear ratio setting, the sliding distance of the second limiting plate 233 is greater than that of the first limiting plate 232. This causes the lower end of the second limiting plate 233 to extend beyond the bottom of the housing 231, forming a protective barrier that blocks the outside of the hook 21 opening. When swaying occurs during hoisting, the second limiting plate 233 can continuously restrain the lifting ring of the air filter device, thereby preventing the lifting ring from slipping off the hook 21 opening. The solution of this application realizes the dynamic sealing function of the hook 21 opening, automatically forming an anti-fall-off structure during hoisting operations. The gravity-driven linkage mechanism ensures that the protective action is completed synchronously with the hoisting operation, eliminating the safety hazards caused by delays in manual operation.

[0047] Compared to traditional solutions that rely on operators manually installing safety pins or adding auxiliary fixing devices, this application's solution requires no additional operational steps and does not affect lifting flexibility. In one embodiment, a purely mechanical structure achieves automatic locking of the suspended object, providing protection the instant the lifting action is completed, without manual intervention. The transmission wheel assembly 235 converts vertical gravity into horizontal protective force, effectively utilizing the weight of the suspended object as a power source and avoiding the maintenance costs associated with using electric or hydraulic systems.

[0048] Reference Figures 5 to 8 In one embodiment of this application, the transmission wheel assembly 235 includes a first gear 2351, a second gear 2352, and a third gear 2353. The first gear 2351 is rotatably disposed in the receiving cavity 2311 and meshes with the first limiting plate 232; the second gear 2352 is located on the side of the first gear 2351 away from the first limiting plate 232 and meshes with the first gear 2351; the third gear 2353 is coaxially disposed with the second gear 2352 and meshes with the second limiting plate 233.

[0049] The first gear 2351 is a transmission element that meshes with the first limiting plate 232 in a rack and gear relationship. Specifically, it can be implemented using a spur gear with a module of 3. It is mounted inside the housing 231 via a rotating shaft and is used to convert the linear motion of the first limiting plate 232 into rotational motion. The second gear 2352 is a transmission element that serves as an intermediate transition. Specifically, it can be implemented using a helical gear with a module of 3. Its number of teeth is in a specific ratio to that of the first gear 2351, and it is used to change the direction of rotation and transmit torque. The third gear 2353 is a transmission element that meshes with the second limiting plate 233 in a rack and gear relationship. Specifically, it can be a combined gear structure coaxially mounted with the second gear 2352, used to convert the rotational motion into linear displacement of the second limiting plate 233.

[0050] Specifically, when the air filter is suspended from hook 21, the first limiting plate 232 slides downward under gravity, causing the first gear 2351 to rotate clockwise. The first gear 2351 drives the meshing second gear 2352 to rotate counterclockwise. Since the second gear 2352 and the third gear 2353 are coaxially fixed, the third gear 2353 rotates counterclockwise synchronously. The third gear 2353 meshes with the rack of the second limiting plate 233, converting the counterclockwise rotation into a downward linear movement of the second limiting plate 233. Through the design of the gear ratio of the first gear 2351, the second gear 2352, and the third gear 2353, for example, a gear ratio of 1:2 between the first gear 2351 and the third gear 2353, the second gear 2352 acts as an idler gear, only changing the direction of rotation, allowing the sliding distance of the second limiting plate 233 to be twice the sliding distance of the first limiting plate 232. This asymmetrical transmission relationship allows the second limiting plate 233 to fully extend out of the limiting hole 2313, forming a physical blockage of the opening of the hook 21. In another embodiment, the transmission ratio between the first gear 2351, the second gear 2352, and the third gear 2353 is 1:0.5:1. Since the transmission ratio of the second gear 2352 is 0.5 times that of the first gear 2351, the rotational speed of the second gear 2352 is reduced to half that of the first gear 2351. The third gear 2353, which is coaxial with the second gear 2352, rotates counterclockwise and drives it to slide downward through meshing with the second limiting plate 233. During the transmission process, the meshing transmission ratio between the third gear 2353 and the second limiting plate 233 is 1:1, so that the sliding distance of the second limiting plate 233 is twice the linear displacement corresponding to the rotation of the second gear 2352, and finally reaches twice the sliding distance of the first limiting plate 232. This avoids the situation where the hook 21 cannot effectively prevent the object being hung from detaching due to insufficient displacement of the second limiting plate 233. Thus, this application ensures that the second limiting plate 233 can extend sufficiently beyond the limiting hole 2313 when the air filter device is hung, completely covering the opening area of ​​the hook 21, forming an effective physical barrier to prevent the lifting ring from accidentally detaching from the hook 21, and avoiding the risk of falling due to device shaking. In one embodiment, a three-stage gear transmission increases the effective stroke of the second limiting plate 233 within a limited space. Compared to a single gear transmission or linkage mechanism, the gear meshing method has higher transmission accuracy and load-bearing capacity, and can avoid transmission failure caused by vibration.

[0051] Reference Figure 5 and Figure 6In one embodiment of this application, the limiting mechanism 23 further includes a fixed plate 234 and an elastic element 238. The fixed plate 234 is located on top of the transmission wheel assembly 235. An extension plate 2322 is formed at the end of the first limiting plate 232 away from the hook 21, extending above the fixed plate 234. The two ends of the elastic element 238 are elastically connected to the fixed plate 234 and the extension plate 2322, respectively. When the air filter is hung on the hook 21, the elastic element 238 is compressed; when the air filter is separated from the hook 21, the elastic element 238 is elastically released. The fixed plate 234 is a rigid support structure connected to the top of the transmission wheel assembly 235, which can be implemented by welding metal plates or bolting, and serves to provide an installation base for the elastic element 238. The elastic element 238 is a mechanical element capable of storing and releasing elastic potential energy, which can be a coil spring, disc spring, or rubber pad, buffering load impact through elastic deformation. The extension plate 2322 refers to the extension portion integrally formed with the first limiting plate 232, which is used to transmit the movement of the first limiting plate 232 to the elastic member 238.

[0052] Specifically, when the air filter is attached to the hook 21, the first limiting plate 232 slides downward under gravity, and the extension plate 2322 moves accordingly, compressing the elastic element 238. At this time, the elastic element 238 stores elastic potential energy. The fixing plate 234 prevents the first limiting plate 232 from sliding down excessively by limiting the compression stroke of the elastic element 238. When the air filter is separated from the hook 21, the elastic element 238 releases its elastic potential energy and pushes the extension plate 2322 upward to reset, simultaneously causing the first limiting plate 232 to return to its initial position. At the same time, the second limiting plate 233 also resets synchronously with the first limiting plate 232. The solution of this embodiment can achieve automatic reset after the air filter is separated from the hook 21 without additional manual intervention, improving the convenience of the hoisting equipment 100.

[0053] Reference Figures 5 to 8 In one embodiment of this application, guide structures are provided between the housing 231 and the first limiting plate 232, and between the housing 231 and the second limiting plate 233. These guide structures guide the sliding of the first limiting plate 232 and the second limiting plate 233. Understandably, the guide structures constrain the movement trajectory of the limiting plates. Specifically, the guide mechanism can be implemented by a guide rod engaging with a guide hole, forming a sliding pair through the contact between the rod and the hole wall, thus limiting lateral displacement of the limiting plates during sliding. Figure 6As shown, the first guide rod 236 mates with the first guide hole, and the second guide rod 237 mates with the second guide hole 2331. Both the first guide rod 236 and the second guide rod extend along the height direction of the housing 231. The first guide hole 2321 penetrates the two end faces of the first limiting plate 232 in the height direction, and the second guide hole 2331 penetrates the two end faces of the second limiting plate 233 in the height direction. Both the first limiting rod and the second limiting rod 43 are metal rods with polished surfaces, and their diameters are fitted with the guide holes with a clearance to reduce frictional resistance.

[0054] In another embodiment, the guide structure can also be a groove formed on the inner wall surface of the housing 231, and a protrusion formed on the surface of the first limiting plate 232 and the second limiting plate 233, or a protrusion formed on the inner wall surface of the housing 231, and a groove formed on the surface of the first limiting plate 232 and the second limiting plate 233. The groove and the protrusion cooperate with each other, and the groove extends along the height direction of the housing 231. The guide structure can ensure that the first limiting plate 232 and the second limiting plate 233 slide down relative to the housing 231, avoiding the situation where the trajectory of the first limiting plate 232 and the second limiting plate 233 deteriorates during the sliding process, causing the second limiting plate 233 to be unable to extend out of the housing 231. This effectively avoids the locking failure problem caused by the unstable sliding of the limiting plate during the hanging of the air filter device.

[0055] Reference Figure 1 , Figure 3 as well as Figure 4 In one embodiment of this application, a first adjustment mechanism 30 is further included. Both ends of the first adjustment mechanism 30 in the length direction are provided with hanging components 20. The first adjustment mechanism can drive the two hanging components 20 to move closer to or further away from each other.

[0056] In one embodiment of this application, the first adjustment mechanism 30 refers to a mechanical device with adjustable length. For example, a bidirectional lead screw can be used to adjust the distance between the two hanging components 20. The first adjustment mechanism includes a first slide rail 31, inside which is provided a first limiting rod 33. The first limiting rod 33 is a bidirectional lead screw, and one end of the first limiting rod 33 is fixedly connected to an adjusting handle 37. Two first sliders 35 are provided on the first limiting rod 33, and each first slider 35 is connected to a hanging component 20. The distance between the two hanging components 20 can be adjusted by adjusting the handle 37. By setting the first adjustment mechanism, the distance between the two hanging components 20 can be adjusted, so that the two hanging components 20 can adapt to different types of air filter devices, improving the flexibility of the hoisting equipment 100.

[0057] Reference Figure 1 and Figure 3In one embodiment of this application, a second adjustment mechanism 40 is also included. The second adjustment mechanism 40 is disposed on the frame 10 and extends in the horizontal direction. The first adjustment mechanism 30 is connected to the second adjustment mechanism 40, and the second adjustment mechanism 40 is used to adjust the position of the first adjustment mechanism 30.

[0058] In one embodiment of this application, the second adjustment mechanism 40 refers to a mechanical component capable of horizontal position adjustment. The second adjustment mechanism 40 includes a second slide rail 41, with both ends connected to the frame 10. A second limiting rod 43 is provided within the second slide rail 41, and a second slider 45 is provided on the second limiting rod 43. The first adjustment mechanism 30 is connected to the second adjustment mechanism 40 via the second slider 45. It is understood that the second limiting rod 43 in the second adjustment mechanism 40 can be a lead screw, which can be driven by a motor or manually. The second adjustment mechanism 40 enables adjustment of the horizontal position of the entire first adjustment mechanism, allowing for rapid changes in the position of the first adjustment mechanism 30. When it is necessary to adjust the horizontal position of the hanging component 20, the second adjustment mechanism 40 can drive the first adjustment mechanism 30 to move horizontally as a whole. During this process, the first adjustment mechanism 30 still maintains its independent adjustment function for the spacing of the hanging component 20. By first operating the second adjustment mechanism 40 for large-scale horizontal alignment, and then fine-tuning the hook 21 spacing through the first adjustment mechanism 30, it is possible to adapt to the positional deviations or space constraints of the lifting rings in the nuclear power equipment installation environment. For example, in a narrow pipe area, the hanging assembly 20 can be moved horizontally to avoid obstacles, and then the hook 21 spacing can be adjusted to complete the precise connection.

[0059] Reference Figure 1 and Figure 2 In one embodiment of this application, a lifting mechanism 50 is further included. The lifting mechanism 50 is disposed on the frame 10, and a second adjusting mechanism 40 is connected to the lifting mechanism 50. The lifting mechanism 50 is used to adjust the height of the second adjusting mechanism 40. The lifting mechanism 50 can be implemented by a hydraulic cylinder, a chain drive 53, or a screw and nut mechanism, and the lifting mechanism 50 can adjust the height of the second adjusting mechanism 40.

[0060] In one specific embodiment, the frame 10 includes two opposing support columns 11 and a crossbeam 13 connecting the two support columns 11, making the frame 10 roughly a gantry structure. The support columns 11 extend vertically, and the support columns 11 also have vertically distributed grooves 111. A screw 51 is fixed in the groove 111. The two ends of the second adjusting mechanism 40 are provided with screw holes, and the screw 51 passes through the screw holes. A sprocket 52 is provided at the top of the screw 51, and the two sprockets 52 are driven by a chain 53. A worm gear 54 is also fixedly connected to the bottom end of one of the screws 51. A fixing frame 55 is also formed on the corresponding support column 11. A drive shaft 56 is rotatably connected inside the fixing frame 55. A worm 57 that meshes with the worm gear 54 is fixedly connected to the drive shaft 56, and a drive component 58 is fixedly connected to one end of the drive shaft 56. The drive component 58 can be a motor or a manual crank. The drive component can drive the screw 51 to rotate, and drive another screw 51 to rotate through the sprocket 52 and chain 53, thereby driving the second adjustment mechanism 40 to move up or down relative to the frame 10.

[0061] When different installation heights are required, the lifting mechanism 50 is activated and pushes the second adjustment mechanism 40 up or down, thereby changing the working height of the hanging assembly 20. For example, in a multi-story structure environment of a nuclear power plant, the lifting mechanism 50 can adjust the position of the second adjustment mechanism 40 according to the target installation floor height, so that the hook 21 is precisely aligned with the lifting ring of the air filter device.

[0062] In some specific embodiments, the lifting mechanism 50 may adopt a gear and rack structure, with the rack vertically fixed on the frame 10. The gear is driven by a motor and connected to the second adjustment mechanism 40. When the gear rotates, it drives the second adjustment mechanism 40 to move up and down along the rack.

[0063] This application enables the hoisting equipment 100 to quickly adjust its working height according to the actual height requirements of the nuclear power equipment installation location, solving the problem of limited applicability caused by the fixed height of traditional tooling, and significantly improving the flexibility of hoisting operations and adaptability to different working conditions.

[0064] Reference Figure 1 In one embodiment of this application, the roller assembly 16 is connected to the bottom of the frame 10 and is used to drive the frame 10 to move.

[0065] The bottom of the support column 11 is provided with a base 15, which is connected to the roller assembly 16. Understandably, each base 15 is provided with at least two rollers.

[0066] This is a movable device located at the bottom of the frame 10. Specifically, it can be implemented using omnidirectional or directional wheels with locking functions. Its function is to provide the frame 10 with controllable mobility. Driving the frame 10 to move refers to the operation method of changing the spatial position of the frame 10 by pushing with external force or mechanical transmission to make the rollers roll. For example, the frame 10 can be manually pushed or the rollers can be rotated by a motor. Its purpose is to eliminate the difficulty of adjusting the position of a fixed frame 10. The roller assembly 16 is fixedly connected to the bottom of the frame 10. When it is necessary to adjust the position of the hoisting equipment 100, the operator can apply a pushing force to make the rollers roll along the ground, driving the frame 10 to move as a whole. During the movement, the rotation direction of the rollers can be controlled by their own structural characteristics, such as using omnidirectional wheels to achieve multi-angle displacement. This movement method allows the hoisting equipment 100 to flexibly approach or move away from the air filter device according to actual operational needs, avoiding the problem of restricted hoisting paths caused by a fixed frame 10. When the roller assembly 16 works in conjunction with the lifting mechanism 50, the first adjustment mechanism 30, and the second adjustment mechanism 40, it can be fixed in position by a locking device after being moved into place, ensuring the stability of the frame 10 during hoisting and reducing the risk of the air filter device accidentally detaching from the hook 21 due to external interference. The hoisting equipment 100 in this solution has flexible mobility, allowing operators to quickly adjust the tooling position to adapt to different installation environments, reducing the labor intensity of manually handling the frame 10. During movement, the cooperation between the roller assembly 16 and the locking device ensures that the frame 10 remains stationary after being positioned, preventing the air filter device from shaking due to the sliding of the frame 10, fundamentally improving the safety of the hoisting process. Furthermore, this structure simplifies the tooling position adjustment process, shortens operation time, and is particularly suitable for operation scenarios with limited space in nuclear power plant buildings.

[0067] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

[0068] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0069] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0071] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0072] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0074] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0075] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A hoisting device for an air filtration unit used in nuclear power plants, characterized in that, include: The frame (10) and the hanging assembly (20) disposed on the frame (10), the hanging assembly (20) including a hook (21) and a limiting mechanism (23), the limiting mechanism (23) including: The housing (231) is connected to the frame (10). The housing (231) has an internal cavity (2311). The bottom of the housing (231) is also provided with a clearance hole (2312) and a limiting hole (2313) communicating with the cavity (2311). The first limiting plate (232) is slidably disposed in the receiving cavity (2311). One end of the first limiting plate (232) extends out of the outer side of the housing (231) through the relief hole (2312) and is connected to the hook (21). The opening of the hook (21) is disposed facing the side of the limiting hole (2313). The second limiting plate (233) is slidably disposed in the receiving cavity (2311) and is disposed opposite to the first limiting plate (232), and one end of the second limiting plate (233) is disposed corresponding to the limiting hole (2313); A transmission wheel assembly (235) is disposed in the receiving cavity (2311), and the transmission wheel assembly is respectively engaged and connected with the first limiting plate (232) and the second limiting plate (233); When the air filter is hung on the hook (21), the gravity of the air filter drives the first limiting plate (232) to slide down relative to the housing (231), and drives the second limiting plate (233) to slide down relative to the housing (231) through the transmission wheel assembly (235). The distance that the second limiting plate (233) slides down relative to the housing (231) is greater than the distance that the first limiting plate (232) slides down relative to the housing (231), so that the second limiting plate (233) extends out of the housing (231) through the limiting hole (2313) and restricts the air filter from separating from the hook (21).

2. The hoisting equipment for the air filtration device for nuclear power plants according to claim 1, characterized in that, The drive wheel assembly (235) includes: The first gear (2351) is rotatably disposed in the receiving cavity (2311) and meshes with the first limiting plate (232); The second gear (2352) is located on the side of the first gear (2351) away from the first limiting plate (232) and is meshed with the first gear (2351); The third gear (2353) is coaxially arranged with the second gear (2352), and the third gear (2353) is meshed with the second limiting plate (233).

3. The hoisting equipment for the air filtration device for nuclear power plants according to claim 2, characterized in that, The transmission ratio between the first gear (2351), the second gear (2352), and the third gear (2353) is 1:0.5:

1.

4. The hoisting equipment for the air filtration device for nuclear power plants according to claim 1, characterized in that, The limiting mechanism (23) further includes a fixing plate (234) and an elastic element (238). The fixing plate (234) is located at the top of the transmission wheel assembly (235). An extension plate (2322) is formed at the end of the first limiting plate (232) away from the hook (21). The extension plate (2322) extends to the top of the fixing plate (234). The two ends of the elastic element (238) elastically abut against the fixing plate (234) and the extension plate (2322) respectively. When the air filter is attached to the hook (21), the elastic element (238) is compressed; when the air filter is separated from the hook (21), the elastic element (238) is released elastically.

5. The hoisting equipment for the air filtration device for nuclear power plants according to claim 1, characterized in that, A guide structure is provided between the housing (231) and the first limiting plate (232), and between the housing (231) and the second limiting plate (233), the guide structure being used to guide the sliding of the first limiting plate (232) and the second limiting plate (233).

6. The hoisting equipment for nuclear power air filtration devices according to claim 5, characterized in that, The guiding structure includes: A first guide rod (236) and a second guide rod (237) are respectively disposed on opposite sides of the receiving cavity (2311). The first limiting plate (232) is provided with a first guide hole, and the second limiting plate (233) is provided with a second guide hole (2331). The first guide rod (236) passes through the first guide hole, and the second guide rod (237) passes through the second guide hole (2331).

7. The hoisting equipment for a nuclear power plant air filtration device according to any one of claims 1 to 6, characterized in that, It also includes a first adjustment mechanism (30), with the hanging components (20) provided at both ends of the length direction of the first adjustment mechanism (30). The first adjustment mechanism (30) can drive the two hanging components (20) to move closer or further apart.

8. The hoisting equipment for a nuclear power plant air filtration device according to claim 7, characterized in that, It also includes a second adjustment mechanism (40), which is located on the frame (10) and extends horizontally. The first adjustment mechanism (30) is connected to the second adjustment mechanism (40), and the second adjustment mechanism (40) is used to adjust the position of the first adjustment mechanism (30).

9. The hoisting equipment for a nuclear power plant air filtration device according to claim 8, characterized in that, It also includes a lifting mechanism (50), which is located on the frame (10). The second adjustment mechanism (40) is connected to the lifting mechanism (50), and the lifting mechanism (50) is used to adjust the height of the second adjustment mechanism (40).

10. The hoisting equipment for a nuclear power plant air filtration device according to claim 7, characterized in that, It also includes a roller assembly (16) connected to the bottom of the frame (10) for driving the frame (10) to move.

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