Thin-wall long-cylinder part hoisting device

Abstract

The invention belongs to the technical field of nuclear power tools, and provides a thin-wall long-cylinder part hoisting device which comprises a mounting frame, a jacking assembly and a lifting hook assembly. The mounting frame can extend into an inner cavity of a to-be-hoisted part and is connected with hoisting equipment during hoisting; the jacking assembly comprises a plurality of jacking pieces and a plurality of pressure sensors, the jacking pieces are distributed on the mounting frame in the circumferential direction and can stretch out and draw back in the radial direction, and the pressure sensors correspondingly detect the radial jacking force of the jacking pieces on a part to be hoisted one to one; the lifting hook assembly comprises a plurality of lifting hook pieces which are uniformly distributed on the mounting frame in the circumferential direction, each lifting hook piece can stretch out and draw back in the radial direction, and each lifting hook piece is provided with a supporting part used for supporting the end face of a part to be lifted. The thin-wall long-cylinder part can be conveniently and accurately hoisted, and deformation of the part can be effectively prevented.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power tooling technology, specifically relating to a hoisting device for thin-walled long cylindrical parts. Background Technology

[0002] Many components of the steam generator are thin-walled, small-diameter, long cylindrical structures made of non-ferrous high-temperature alloys. The lengths of these components range from several hundred to over a thousand millimeters, and their diameters vary from over two hundred to nearly four hundred millimeters. This type of component presents limitations in manufacturing and vertical installation, including difficulties in preventing deformation and lifting. Due to the thin walls and high dimensional accuracy requirements, welding lifting lugs can easily deform the components, failing to meet design precision requirements. Furthermore, welding lifting lugs can result in undercut, making it impossible to directly weld lifting lugs for turning and lifting. Simultaneously, due to their thin walls, poor rigidity, and lack of stress points on the inner and outer walls, conventional lifting tools (such as vacuum chucks and electromagnetic chucks) cannot meet the high-precision requirements of nuclear power components. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this invention is to provide a lifting device for thin-walled long cylindrical parts, which can conveniently and accurately lift thin-walled long cylindrical parts and effectively prevent deformation of the parts.

[0004] The technical solution adopted by this invention to solve its technical problem is: A lifting device for thin-walled long cylindrical parts includes a mounting frame, a clamping assembly, and a hook assembly. The mounting frame can extend into the inner cavity of the part to be lifted and is connected to the lifting equipment during lifting. The clamping assembly includes multiple clamping members and multiple pressure sensors. Each clamping member is distributed circumferentially on the mounting frame and can extend and retract radially. Each pressure sensor detects the radial clamping force of each clamping member on the part to be lifted. The hook assembly includes multiple hooks evenly distributed circumferentially on the mounting frame. Each hook can extend and retract radially, and each hook is provided with a support portion for supporting the end face of the part to be lifted.

[0005] In a preferred embodiment of the present invention, each of the pressure sensors is disposed at the outer end of each of the clamping members.

[0006] In a preferred embodiment of the present invention, the clamping assembly further includes a plurality of fixing plates, each of the fixing plates being disposed on the mounting bracket and corresponding to each of the clamping members; the clamping member and the fixing plate are engaged by a threaded structure to achieve radial extensibility of the clamping member.

[0007] In a preferred embodiment of the present invention, the hook component includes a lifting rod; one end of the lifting rod is adapted to the mounting bracket, and the support portion is disposed at the other end of the lifting rod and protrudes radially.

[0008] In a preferred embodiment of the present invention, the hook assembly further includes a plurality of positioning members, which are disposed on the mounting frame and correspond one-to-one with the plurality of hook members; each positioning member is provided with a plurality of positioning grooves arranged radially, the top of the positioning grooves being open; each hook member is provided with a positioning rod, which can be embedded in the positioning groove; the mounting frame and each positioning member are provided with a clearance hole for avoiding the hook member.

[0009] Preferably, each of the positioning elements includes two opposing positioning blocks, each positioning block is provided with the positioning groove, and the clearance hole is located between the two positioning blocks.

[0010] Preferably, the hook component is provided with a plurality of positioning holes, which are arranged along the length direction of the hook component; the positioning rod passes through one of the positioning holes.

[0011] In a preferred embodiment of the present invention, the top of the mounting bracket is provided with a mounting hole.

[0012] In a preferred embodiment of the present invention, the mounting bracket includes a mounting plate, and both the clamping assembly and the hook assembly are disposed on the mounting plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are: The thin-walled long cylindrical part lifting device of the present invention is used by first inserting it into the inner cavity of the part to be lifted, then adjusting the radial position of each clamping member so that each clamping member presses against the inner wall of the part to be lifted, and fine-tuning the pressure of each clamping member on the part based on the data of each pressure sensor to ensure a balanced circumferential stress distribution in the cylinder and avoid local plastic deformation. At the same time, the hook members of the hook assembly are adjusted so that the support part on the hook member extends beyond the end of the part to be lifted, and the annular end of the part to be lifted is supported on the support part of each hook member. Finally, the lifting device of the present invention is turned over or lifted and transferred using lifting equipment until the part is lifted into place. During disassembly, after reversing the position of the clamping members and the hook members, the lifting device can be removed from the inner cavity of the part.

[0014] The thin-walled long cylindrical parts hoisting device of the present invention is simple and convenient to use, and has high disassembly and assembly efficiency. It can be easily and quickly removed from the inner cavity of the parts, and can avoid deformation of the thin-walled long cylindrical parts during hoisting. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view of the thin-walled long cylindrical part hoisting device of the present invention (some clamping parts are not shown).

[0017] Figure 2 This is a top view of the thin-walled long cylindrical part hoisting device of the present invention.

[0018] Figure 3 This is a perspective view of the thin-walled long cylindrical part hoisting device of the present invention (the clamping component is not shown).

[0019] Figure 4 for Figure 3 A magnified view of part A in the image.

[0020] in: 1-Mounting bracket, 2-Securing component, 3-Fixing plate, 4-Pressure sensor, 5-Positioning block, 6-Positioning rod, 7-Allowing hole, 8-Mounting hole, 9-Positioning groove, 10-Hook component, 11-Positioning hole, 12-Support component. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0023] Example 1 See Figures 1-4This embodiment discloses a lifting device for thin-walled long cylindrical parts, including a mounting frame 1, a clamping assembly, and a hook assembly. The mounting frame 1 can extend into the inner cavity of the part to be lifted and is connected to the lifting equipment (which may be a crane, elevator, or other equipment that can drive the mounting frame 1 to rise and fall) during lifting. The clamping assembly includes multiple clamping members 2 and multiple pressure sensors 4. Each clamping member 2 is distributed circumferentially on the mounting frame 1 and can extend and retract radially. Each pressure sensor 4 detects the radial clamping force of each clamping member 2 on the part to be lifted. The hook assembly includes multiple hook members 10 evenly distributed circumferentially on the mounting frame 1. Each hook member 10 can extend and retract radially, and each hook member 10 is provided with a support portion 12 for supporting the end face of the part to be lifted.

[0024] The thin-walled long cylindrical parts hoisting device of this embodiment is simple and convenient to use, and has high disassembly and assembly efficiency. It can be easily and quickly removed from the inner cavity of the parts, and can avoid deformation of the thin-walled long cylindrical parts during hoisting. During hoisting, the parts have two stress positions in height through the action of each clamping member 2 and each lifting rod, making the hoisting and transfer more reliable and stable.

[0025] Furthermore, in this embodiment, each pressure sensor 4 is correspondingly installed at the outer end of each clamping member 2. In this embodiment, the pressure sensors 4 are installed at the end of the clamping member 2 and integrated into a single structure, which facilitates installation and adjustment, and at the same time can more accurately detect the clamping pressure of the clamping member 2 on the part to be lifted.

[0026] To facilitate the adjustability of the clamping member 2, the clamping assembly in this embodiment also includes multiple fixing plates 3, each fixed plate 3 being mounted on the mounting bracket 1 and corresponding to each clamping member 2; the clamping member 2 and the fixing plate 3 are engaged by a threaded structure to achieve radial extension and retraction of the clamping member 2. Specifically, the fixing plate 3 in this embodiment is provided with a threaded hole, and the clamping member 2 is provided with an external thread. Radial adjustment of the clamping member 2 can be achieved through the engagement of the threaded hole and the external thread, resulting in a simple structure and convenient operation. In addition, the clamping member 2 in this embodiment can be a bolt from the prior art, or other rod-shaped accessories with external thread structures.

[0027] In this embodiment, the hook component 10 adopts a lifting rod structure. One end of the lifting rod is adapted to the mounting frame 1, and the support part 12 is provided at the other end of the lifting rod and protrudes radially. When lifting the thin-walled long cylindrical part, the lifting rod extends into the inner cavity of the part and the support part 12 extends out of the inner cavity of the part. Then, by adjusting the radial position of each lifting rod, the support part 12 on each lifting rod corresponds to the end of the thin-walled long cylindrical part, so that the end of the thin-walled long cylindrical part can be supported on the support part 12 during lifting, forming a support for the thin-walled long cylindrical part, thereby lifting the thin-walled long cylindrical part into place.

[0028] Furthermore, in this embodiment, an opening groove can be provided on the support part 12, so that the annular end face of the thin-walled long cylindrical part can be embedded in the opening groove, thereby improving the stability of the part during hoisting.

[0029] The hook assembly in this embodiment also includes multiple positioning components, which are mounted on the mounting frame 1 and correspond one-to-one with multiple lifting rods. Each positioning component has several radially arranged positioning grooves 9, with the top of the positioning grooves 9 open. Each lifting rod has a positioning rod 6, which can be embedded in the positioning groove 9. The mounting frame 1 and each positioning component have corresponding clearance holes 7 for avoiding the lifting rods. When it is necessary to adjust the radial position of the lifting rod, the lifting rod can be lifted so that the positioning rod 6 at the end of the lifting rod leaves the positioning groove 9. After moving to a suitable position, the positioning rod 6 at the end of the lifting rod can be placed back into the corresponding positioning groove 9, thereby realizing the adjustment of the radial position of the lifting rod. In order to improve the reliability of the lifting rod position, this embodiment sets both the positioning rod 6 and the positioning groove 9 as rectangles, which can effectively limit the position of the lifting rod. Of course, other shapes can also be used. This design can effectively prevent the lifting rod from becoming loose from the thin-walled long cylindrical parts and the support part 12.

[0030] In this embodiment, the positioning components each include two opposing positioning blocks 5, each positioning block 5 having a positioning groove 9, and a clearance hole 7 located between the two positioning blocks 5. In this embodiment, the two ends of the positioning rod 6 extend out and are respectively placed in the positioning grooves 9 of the two positioning blocks 5.

[0031] Furthermore, the boom is provided with multiple positioning holes 11, which are arranged along the length of the boom; the positioning rod 6 passes through one of the positioning holes 11. The positioning holes 11 allow for assembly and mating with the positioning rod 6, enabling both ends of the positioning rod 6 to extend and fit into the positioning grooves 9 on the two positioning blocks 5. The multiple positioning holes 11 also allow for flexible length adjustment of the boom according to the dimensions of the thin-walled long cylindrical part to be lifted, resulting in greater adaptability and easier adjustment.

[0032] The mounting bracket 1 in this embodiment includes a mounting plate, and a clamping assembly and a hook assembly are both mounted on the mounting plate. This embodiment uses a plate-shaped mounting bracket 1, which is simple in structure and facilitates the installation of the clamping assembly and the hook assembly. The mounting plate in this embodiment has a circular structure, which facilitates adaptation to the internal cavity of parts with elongated cylindrical structures. However, the shape of the mounting plate in this embodiment is not limited to this; other shapes such as rectangles can also be used. In addition, a mounting hole 8 is provided at the top of the mounting plate. This mounting hole 8 can be used to connect to lifting equipment, for example, by fixing it with bolts and nuts.

[0033] In this embodiment, there are three hook assemblies arranged at equal angles along the circumference; and six clamping assemblies. The distribution of the clamping assemblies and hook assemblies in this embodiment is shown in [reference needed]. Figures 2-3 . Furthermore, the mounting frame 1 in this embodiment may include two or more mounting plates, which are parallel to each other and spaced apart. The lifting rods of each hook assembly are connected to the top mounting plate and can move radially. Other mounting plates are provided with through holes for the lifting rods to pass through. By setting multiple mounting plates, the overall length of the mounting frame 1 can be increased, and each lifting rod can be limited and protected, which helps to improve the stability and reliability of the lifting rods. At the same time, a clamping assembly can be set on each mounting plate to improve the clamping effect on the inner wall of the thin-walled long cylindrical part and the fine adjustment effect.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A hoisting device for thin-walled long cylindrical parts, characterized in that, The device includes a mounting frame, a clamping assembly, and a hook assembly. The mounting frame can extend into the inner cavity of the part to be lifted and is connected to the lifting equipment during lifting. The clamping assembly includes multiple clamping members and multiple pressure sensors. Each clamping member is distributed circumferentially on the mounting frame and can extend and retract radially. Each pressure sensor detects the radial clamping force of each clamping member on the part to be lifted. The hook assembly includes multiple hooks evenly distributed circumferentially on the mounting frame. Each hook can extend and retract radially, and each hook is provided with a support portion for supporting the end face of the part to be lifted.

2. The thin-walled long cylindrical part hoisting device according to claim 1, characterized in that, Each of the pressure sensors is installed at the outer end of each of the clamping members.

3. The thin-walled long cylindrical part hoisting device according to claim 1 or 2, characterized in that, The clamping assembly also includes multiple fixing plates, each of which is disposed on the mounting bracket and corresponds to each clamping member; the clamping member and the fixing plate are engaged by a threaded structure to achieve radial expansion and contraction of the clamping member.

4. The thin-walled long cylindrical part hoisting device according to claim 1, characterized in that, The hook component includes a lifting rod; one end of the lifting rod is adapted to the mounting frame, and the support portion is disposed at the other end of the lifting rod and protrudes radially.

5. The thin-walled long cylindrical part hoisting device according to claim 1 or 4, characterized in that, The hook assembly also includes multiple positioning elements, which are disposed on the mounting frame and correspond one-to-one with the multiple hooks. Each positioning element has a plurality of positioning grooves arranged radially, and the top of the positioning grooves is open. Each hook is provided with a positioning rod, which can be embedded in the positioning groove. The mounting frame and each positioning element are provided with a clearance hole for avoiding the hook.

6. The thin-walled long cylindrical part hoisting device according to claim 5, characterized in that, Each of the positioning components includes two opposing positioning blocks, each positioning block is provided with the positioning groove, and the clearance hole is located between the two positioning blocks.

7. The thin-walled long cylindrical part hoisting device according to claim 6, characterized in that, The hook component is provided with multiple positioning holes, which are arranged along the length of the hook component; the positioning rod passes through one of the positioning holes.

8. The thin-walled long cylindrical part hoisting device according to claim 1, characterized in that, The mounting bracket has mounting holes on its top.

9. The thin-walled long cylindrical part hoisting device according to claim 1, characterized in that, The mounting bracket includes a mounting plate, and both the clamping assembly and the hook assembly are mounted on the mounting plate.

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