Anti-inclination bottom side ring body cold shield hoisting tool

Abstract

The application discloses an anti-inclination bottom side ring body cold shield hoisting tool, and relates to the technical field of hoisting tools, which comprises a guide hoisting mechanism and a plurality of hooking mechanisms. The guide hoisting mechanism is composed of an inner wall clamping plate, a half-moon supporting plate, a vertical cylinder and a half-moon top plate, and is capable of achieving stable hoisting by clamping the inner arc surface of the cold shield and cooperating with the top lifting lugs; the hooking mechanism comprises a supporting frame, a rotating rod and a crescent-shaped hook tongue, the hook tongue is rotatably hooked into the crescent-shaped groove of the cold shield reinforcing rib and is locked by a rotating bolt to prevent unhooking. In addition, the device can be optionally provided with an outer wall clamping plate and the inner wall clamping plate are clamped and locked to further enhance the stability; a half-moon bottom plate with a reinforcing rib groove is arranged at the bottom to adapt to the reinforcing rib, and a stopper is arranged to limit the transverse displacement. The application effectively disperses the hoisting stress through the cooperation of multi-point hooking and clamping, ensures that the bottom side ring body cold shield remains horizontal during hoisting, avoids structural deformation, and significantly improves the safety and precision of hoisting operations.

Description

Technical Field

[0001] This invention relates to the field of hoisting fixture technology, specifically to a bottom-side ring-shaped cold shield hoisting fixture that prevents tilting. Background Technology

[0002] The cold shield of a fusion device is a key cryogenic thermal management component in magnetic confinement fusion devices (such as tokamaks). Its core function is to establish a thermal barrier between the high-temperature plasma / vacuum chamber and the cryogenic superconducting magnet, significantly reducing the magnet's thermal load and ensuring superconducting stability. It is a core component of the cryogenic system of the fusion device. Its main body is a toroidal rotating structure (adapted to the tokamak toroidal container), composed of multiple fan-shaped / arc-shaped cold shield panels, facilitating transportation and installation. During the cold shield hoisting process, large-sized, heavy cold shield components need to be vertically lifted by cranes and continuously leveled. Throughout this process, the load on each lifting strap must be constantly monitored to prevent tilting and thus control the deformation of the cold shield components.

[0003] The bottom side ring cold shield is a key cryogenic insulation component in a nuclear fusion device. Its structure is based on a bottom ring-shaped support structure, combined with a side arc-shaped shield module. The top is connected to the upper module through a radial sealing plate. The whole structure is a large-sized, thin-walled ring structure with multiple welding weak points (such as fan-shaped segmented butt welds and cooling pipe connection welds).

[0004] Existing hoisting fixtures mostly use external clamping or end-support methods to fix cold screens. For example, the authorized invention patent CN120482897B discloses a hoisting structure that uses a main fixing frame and temporary outriggers to clamp and support the cold screen from the outer flange. Although this solution has a certain degree of versatility, it has obvious limitations: First, it cannot be adapted to cold screens without an outer flange or with only an internal reinforcement structure; second, it lacks rigid constraints on the posture of the cold screen body during hoisting, making it prone to slight swaying due to shaking, affecting installation accuracy; third, it does not have a special avoidance design for the weld area of ​​the cold screen, and the hoisting stress may be directly applied to the weld joint, posing a risk of damage.

[0005] Therefore, the cold shield faces the following technical problems during the hoisting process:

[0006] 1. Poor anti-tilt effect: Existing hoisting fixtures mostly use a simple connection method of lifting lugs and slings, which cannot effectively limit the horizontal offset and torsional freedom of the cold screen. The cold screen is prone to tilting due to the imbalance of the hoisting posture, which in turn causes the weld to bear additional shear stress and tensile stress, induces the propagation of microcracks, and damages the structural integrity and vacuum sealing of the cold screen.

[0007] 2. Insufficient weld protection: The supporting structure of some hoisting equipment is prone to direct contact with cold shield welds, which causes local compressive stress concentration in the welds when the hoisting is under stress. Furthermore, the welds become more brittle under low temperature conditions, further exacerbating the risk of damage.

[0008] 3. Uneven stress distribution: The cold shield is a thin-walled arc-shaped structure. The support points of the existing tooling are mostly in local contact, which can easily lead to elastic deformation of the cold shield, pulling on the weld and internal cooling pipes, affecting the subsequent installation accuracy and performance.

[0009] In the manufacturing and installation of large cryogenic equipment (such as superconducting magnets and liquid helium containers), cold shields, as critical thermal insulation components, are typically made of thin-walled stainless steel. While lightweight, they are relatively weak in rigidity, and their inner walls often feature circumferential reinforcing ribs and crescent-shaped slots for assembly and positioning. During hoisting and transportation, uneven stress or tilting can easily lead to cold shield deformation, weld cracking, and even safety accidents. Therefore, especially for specific cold shield structures with internal reinforcing ribs and crescent-shaped slots, there is an urgent need for specialized hoisting fixtures capable of precise internal fitting, active locking of the reinforcing ribs, and effective avoidance of weld areas, to balance safety, stability, and structural protection. Summary of the Invention

[0010] To address the aforementioned technical problems, this invention provides a bottom-side ring-shaped cold screen hoisting fixture that prevents tilting. During hoisting, it effectively limits horizontal offset and torsion, ensuring stable vertical hoisting posture and preventing tilting; it avoids the weld seam location, preventing direct stress on the weld seam and protecting the structural integrity of the weld seam; it achieves uniform stress distribution on the curved surface of the cold screen, reducing elastic deformation of the thin-walled structure and ensuring that cooling pipes and components are not damaged during hoisting.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A bottom-side ring-shaped cold screen anti-tilting hoisting fixture includes a guide hoisting mechanism, several hook and fastener mechanisms, and an outer wall plate. The guide hoisting mechanism includes an inner wall plate, a crescent-shaped support plate, a vertical cylinder, a crescent-shaped top plate, and a crescent-shaped bottom plate. The inner wall plate is attached to the inner arc surface of the bottom-side ring-shaped cold screen. Both ends of the inner wall plate are fixedly connected to the crescent-shaped support plate. The side of the crescent-shaped support plate away from the inner wall plate is fixedly connected to the crescent-shaped top plate through the vertical cylinder. A lifting lug is fixed to the top of the crescent-shaped top plate. The crescent-shaped bottom plate is clamped at the bottom end of the crescent-shaped support plate. Several guide grooves for adapting and clamping the reinforcing ribs of the bottom-side ring-shaped cold screen are opened on the arc surface of both the crescent-shaped support plate and the crescent-shaped bottom plate.

[0013] The hook mechanism includes a support frame, a rotating rod, and a crescent-shaped hook tongue. The support frame is fixed to the inner wall panel, the rotating rod is rotatably installed on the inner frame wall of the support frame, and the crescent-shaped hook tongue is rotatably installed inside the support frame via the rotating rod. The crescent-shaped hook tongue hooks into the crescent groove set on the reinforcing rib of the bottom side ring cold screen. The support frame is also provided with a screw bolt for supporting and locking the crescent-shaped hook tongue. The outer wall panel is clamped on the outer wall of the bottom side ring cold screen away from the inner wall panel. The inner wall panel and the outer wall panel are clamped on the side wall of the bottom side ring cold screen, and the inner wall panel and the outer wall panel are locked together.

[0014] Beneficial effects:

[0015] 1. To address the problems of horizontal displacement and large torsional freedom, and easy tilting of cold screens caused by simple lifting lug connections in existing tooling, this invention designs a unique hook-and-loop mechanism. A rotating rod drives a crescent-shaped hook tongue to flip, hooking it upwards into the crescent groove on the reinforcing rib of the cold screen, and then uses a screw-on bolt for rigid support and locking. This "reverse-loop" connection directly transmits the lifting force to the reinforcing rib area (the stress safety zone) where the cold screen structure has the highest strength, not only limiting the radial sway of the cold screen but also eliminating torsional freedom at its source. Combined with the guide post / guide hole cooperation between the semi-circular end plate and the semi-circular support plate in the lifting guide mechanism, precise vertical guidance is provided at the moment of lifting off the ground, effectively offsetting impact loads and ensuring that the cold screen maintains a vertical posture throughout the entire lifting process, avoiding excessive weld shear stress and the risk of micro-crack propagation caused by tilting.

[0016] 2. To address the problem of existing tooling support points easily coming into direct contact with the weld, causing low-temperature brittle weld damage, this invention adopts a bidirectional clamping design with inner and outer wall plates. The main body of the tooling adheres to the inner arc surface of the cold shield through the inner wall plate, and is clamped from the outside by the outer wall plate, forming a stable sandwich clamping structure by bolt locking. The design logic of this structure is to apply the supporting force and clamping force entirely to the base material area on both sides of the weld, physically avoiding weak points such as the fan-shaped segmented butt weld and the cooling pipe connection weld. This design prevents the concentration of lifting stress on the weld joint, effectively protecting the structural integrity and vacuum sealing performance of the cold shield under low-temperature conditions, and eliminating weld damage caused by tooling pressure.

[0017] 3. Addressing the issue that existing cold shields, being large-sized, thin-walled, curved structures, are prone to elastic deformation and strain on internal pipes due to localized contact, this invention achieves full-area surface contact support. The curved surface design of the semi-circular support plate and the semi-circular end plate precisely fits the inner curved surface of the cold shield. Combined with multiple symmetrically distributed hook mechanisms, the massive lifting load is evenly distributed across the entire base material of the cold shield, avoiding thin-walled elastic deformation caused by localized stress concentration, thus protecting the delicate internal cooling pipes from strain. Furthermore, an innovative adjustable counterweight system (sloping cylinder wall, tapered pipe arrangement, and filling port) is installed inside the vertical cylinder, allowing dynamic adjustment of the tooling's center of gravity by injecting steel balls or counterweight oil. This design can flexibly adapt to potential center of gravity deviations in different batches of cold shields, further improving the stability and safety of the lifting process.

[0018] 4. This invention is specifically designed for cold shield structures with internal wall reinforcing ribs and crescent grooves. Utilizing the guiding effect of the stop blocks on the outer side of the reinforcing ribs, it achieves rapid centering and installation of the tooling. The snap-fit ​​engagement between the guide groove and the reinforcing rib ensures that the cold shield is confined to the correct movement trajectory during the initial lifting phase, significantly improving installation accuracy. Simultaneously, the modular design of the hook and clamping mechanism supports rapid unlocking and separation, facilitating tooling removal and reuse after the cold shield is in place, significantly improving on-site operational efficiency in the manufacturing of large cryogenic equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram illustrating the usage state of a bottom-side ring-shaped cold shield hoisting fixture for preventing tilting according to the present invention.

[0020] Figure 2 This is a schematic diagram showing the disassembled bottom side ring cooling screen and hook mechanism of the present invention;

[0021] Figure 3 This is a schematic diagram showing the disassembly of the semi-circular support plate and the semi-circular end plate of the present invention;

[0022] Figure 4 This is a schematic diagram of the hook and latch mechanism of the present invention;

[0023] Figure 5 This is a cross-sectional view of the hook and latch mechanism of the present invention;

[0024] Figure 6 This is a schematic diagram showing the disassembled support frame and rotating rod of the present invention;

[0025] Figure 7 This is a sectional view of the vertical cylinder of the present invention;

[0026] Figure 8 For the present invention Figure 2 Enlarged view of point A in the middle;

[0027] Figure 9 For the present invention Figure 7Enlarged view of point B in the middle.

[0028] The attached figures are labeled as follows: 1-Hook and latch mechanism; 101-Support frame; 102-Crescent-shaped hook tongue; 1021-Arc-shaped top head; 103-Crescent groove; 104-Rotating rod; 105-U-shaped plate; 1051-Threaded hole; 106-Receiving plate; 1061-Receiving hole; 107-Screw bolt; 108-Stop block; 109-Frame strip plate; 2-Guide lifting mechanism; 201-Inner wall panel; 202-Half-moon support plate; 20 3-Vertical cylinder; 2031-Inclined cylinder wall; 2032-Tapered pipe arrangement; 2033-Threaded column; 2034-Injection port; 204-Half-moon top plate; 205-Lifting lug; 206-Half-moon bottom plate; 2061-Side support plate; 207-Arc-surface limiting block; 208-Guide rib groove; 209-Guide hole; 210-Guide column; 211-Side connecting plate; 3-Bottom side ring cold shield; 301-Reinforcing rib; 4-Outer wall cladding. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0030] like Figure 1 , Figure 2 , Figure 8 As shown, the anti-tilting bottom-side ring-shaped cold screen hoisting fixture of the present invention includes several hook mechanisms 1, a guide mechanism 2, and an outer wall plate 4. The guide mechanism 2 has an inner wall plate 201, and several reinforcing ribs 301 are vertically arranged on the inner surface of the bottom-side ring-shaped cold screen 3. Each reinforcing rib 301 is hooked with a hook mechanism 1. The outer wall plate 4 is clamped on the outer wall of the bottom-side ring-shaped cold screen 3 away from the inner wall plate 201, and the inner wall plate 201 is adapted to the outer wall plate 4 and clamps the inclined screen surface of the bottom-side ring-shaped cold screen 3. The inner wall plate 201 and the outer wall plate 4 are locked together by evenly arranged bolts and nuts, thereby ensuring that the outer wall plate 4 and the inner wall plate 201 stably clamp the bottom-side ring-shaped cold screen 3, enhancing the posture constraint of the bottom-side ring-shaped cold screen 3 during hoisting, and preventing the bottom-side ring-shaped cold screen 3 from swaying and tilting during hoisting.

[0031] like Figure 4 , Figure 5 , Figure 8As shown, in an embodiment of the present invention, the hook and fastener mechanism 1 includes a support frame 101. A plurality of crescent-shaped hook tongues 102 are rotatably mounted on the inner frame wall of the support frame 101 via a plurality of rotating rods 104. An arc-shaped top head 1021 is provided at the end of the crescent-shaped hook tongue 102 away from the rotating rods 104. A crescent groove 103 is provided on one side of the reinforcing rib 301, and the crescent-shaped hook tongue 102 is hooked into the crescent groove 103 in a reverse hooking manner. A U-shaped plate 105 is fixed on the outer frame wall of the support frame 101 near the rotating rods 104, and the U-shaped plate 105 is supported and connected to the crescent-shaped hook tongue 102 via a screw bolt 107. In an embodiment of the present invention, a plurality of frame strip plates 109 are fixed between the inner frame walls of the support frame 101, and the thickness of the frame strip plates 109 is the same as the thickness of the frame strips of the support frame 101. The present invention enhances the overall strength of the support frame 101 by fixing the frame strip plate 109 between the inner frame walls of the support frame 101, and avoids excessive deformation of the support frame 101 due to concentrated hoisting force.

[0032] like Figure 1 , Figure 5 As shown in the embodiment of the present invention, a stop block 108 is fixedly provided on the outer wall of the support frame 101 near the crescent-shaped hook tongue 102, and the stop block 108 blocks the two ends of the crescent groove 103. By providing the stop block 108 at the support frame 101, when the support frame 101 is lifted and lowered vertically towards the reinforcing rib 301, the stop block 108 clamps the outside of the reinforcing rib 301 to guide the descent. Simultaneously, the stop block 108 blocks the two ends of the crescent groove 103, restricting and guiding the crescent-shaped hook tongue 102 on both sides, ensuring that the crescent-shaped hook tongue 102 stably flips into the crescent groove 103.

[0033] like Figure 5 , Figure 6 As shown, in an embodiment of the present invention, a receiving plate 106 is fixed between the outer arc wall of the crescent-shaped hook tongue 102 and the rotating rod 104, and a receiving hole 1061 adapted to the screw-on bolt 107 is provided on the outer wall of the receiving plate 106. A threaded hole 1051 for threaded connection of the screw-on bolt 107 is provided on one side of the receiving hole 1061. By providing a receiving plate 106 at the crescent-shaped hook tongue 102 and the rotating rod 104, and after the screw-on bolt 107 is threaded into the threaded hole 1051 at the U-shaped plate 105, the screw-on bolt 107 can be supported in the receiving hole 1061 of the receiving plate 106, ensuring the stable support of the screw-on bolt 107 for the crescent-shaped hook tongue 102.

[0034] like Figure 2 , Figure 3As shown, in an embodiment of the present invention, the guide lifting mechanism 2 includes an inner wall plate 201, which is fixed to a crescent-shaped support plate 202 via a support frame 101. The side of the crescent-shaped support plate 202 away from the support frame 101 is fixed to a crescent-shaped top plate 204 via a vertical cylinder 203. A plurality of lifting lugs 205 are fixed to the top of the crescent-shaped top plate 204. A crescent-shaped bottom plate 206 is fitted onto the bottom of the crescent-shaped support plate 202. A plurality of guide rib grooves 208 are provided on the arc surface of the crescent-shaped bottom plate 206 and the crescent-shaped support plate 202 for fitting and fitting reinforcing ribs 301. A plurality of guide posts 210 are fixed to the top of the crescent-shaped bottom plate 206 for fitting and inserting into the crescent-shaped support plate 202. This invention utilizes a reinforcing rib 301 at the bottom side ring-shaped cold shield 3 in conjunction with a hook mechanism 1. The support frame 101 of the hook mechanism 1 uses a rotating rod 104 to support the crescent-shaped hook tongue 102 to rotate, causing the crescent-shaped hook tongue 102 to hook upward into the crescent groove 103 of the reinforcing rib 301. Simultaneously, the U-shaped plate 105 is provided with a rotating bolt 107 to rotate and support the crescent-shaped hook tongue 102, so that the crescent-shaped hook tongue 102 is tightly hooked with the reinforcing rib 301. As the support frame 101 attaches to the inner wall plate 201 and the crescent-shaped support plate 202, After the vertical cylinder 203 and the crescent-shaped top plate 204 are fixed at the hoisting frame, the lifting lug 205 at the top of the crescent-shaped top plate 204 is connected to the lifting device of the external crane using a shackle. As the hoisting frame is lifted, the crescent-shaped hook tongue 102 securely fastens the reinforcing rib 301 and the bottom side ring cold screen 3 to the hoisting frame, transferring the hoisting force to the stress safety zone of the bottom side ring cold screen 3, limiting the radial swaying and tilting of the bottom side ring cold screen 3, and solving the swaying and tilting problem of the bottom side ring cold screen 3 during hoisting. Meanwhile, the present invention provides a lifting mechanism 2 that works in conjunction with the hook mechanism 1. The lifting mechanism 2 consists of a lifting frame composed of an inner wall plate 201, a crescent-shaped support plate 202, a vertical cylinder 203, and a crescent-shaped top plate 204. The frame is supported on the inner arc surface of the bottom side ring-shaped cold screen 3. The crescent-shaped bottom plate 206 serves as the guiding support base on the ground. When the lifting frame is lifted off the ground, the reinforcing rib 301 is guided upward at the guide rib groove 208 of the crescent-shaped bottom plate 206, and the crescent-shaped support plate 202 is guided upward at the crescent-shaped bottom plate 206 and its guide column 210. This provides vertical guidance at the moment of lifting off the ground, ensuring that the bottom side ring-shaped cold screen 3 is not prone to swaying or tilting when lifted off the ground. This further solves the problem of the bottom side ring-shaped cold screen 3 being prone to swaying and tilting during the lifting process.

[0035] like Figure 2 , Figure 3As shown in the embodiment of the present invention, the surface of the semi-circular support plate 202 is provided with a plurality of guide holes 209 adapted to be fitted onto the guide post 210. A plurality of side support plates 2061 are fixed to the straight surface of the semi-circular support plate 206 near the guide post 210. At least two sets of arc-shaped limiting blocks 207 are fixed to the top of the semi-circular support plate 206, and the arc-shaped limiting blocks 207 are adapted to be fitted onto the arc-shaped outer wall of the semi-circular support plate 202. The present invention, by providing guide holes 209 on the surface of the semi-circular support plate 202 for guiding insertion with the guide post 210, ensures the guided rise of the semi-circular support plate 202 at the semi-circular support plate 206. Simultaneously, the side support plates 2061 at the semi-circular support plate 206 increase the contact area with the bottom, ensuring the supporting stability of the semi-circular support plate 206.

[0036] like Figure 3 As shown, in an embodiment of the present invention, at least two sets of side connecting plates 211 are fixed between the two end plates of the inner wall panel 201 away from the support frame 101 and the crescent-shaped support plate 202, and the inner arc surface of the inner wall panel 201 is fixed to the outer arc surface of the crescent-shaped top plate 204. The present invention strengthens the connection strength between the inner wall panel 201 and the crescent-shaped support plate 202 by fixing the side connecting plates 211 between the inner wall panel 201 and the crescent-shaped support plate 202. Simultaneously, the fixing of the inner wall panel 201 and the crescent-shaped top plate 204 ensures the overall strength of the inner wall panel 201 and the crescent-shaped top plate 204 during hoisting, making them less prone to separation.

[0037] like Figure 3 , Figure 7 , Figure 9 As shown, in an embodiment of the present invention, an inclined cylinder wall 2031 is provided on the inner wall of the bottom end of the vertical cylinder 203, and a tapered pipe 2032 is fixed at the lowest point of the inclined cylinder wall 2031. The tapered pipe 2032 is interconnected with the vertical cylinder 203, and a threaded post 2033 is threadedly connected to the bottom opening of the tapered pipe 2032. A filling port 2034 is provided on the outer cylinder wall of the vertical cylinder 203 away from the inclined cylinder wall 2031. The present invention provides an inclined cylinder wall 2031 inside the vertical cylinder 203, and adds counterweight materials, such as steel balls and counterweight oil, into the vertical cylinder 203 through the filling port 2034. By increasing or decreasing the counterweight medium, the center of gravity of the tooling is dynamically adjusted to adapt to the center of gravity deviation when the bottom side ring cold screen 3 is lifted, further suppressing tilting. After the threaded post 2033 is rotated away from the tapered pipe 2032, the counterweight material can be discharged from the bottom opening of the tapered pipe 2032.

[0038] It should be noted that the surface of the side support plate 2061 can be drilled, and then a support rod can be threaded to be connected for mounting a counterweight block with holes on the mounting surface for counterweighting. When the external crane is connected to the lifting lug 205 through the shackle, a special balance beam is suspended under the main hook of the crane. The number and spacing of the lifting points of the balance beam correspond one-to-one with the lifting lug 205. The pin of the shackle is inserted into the through hole of the lifting lug 205 to ensure that the contact between the shackle and the lifting lug 205 is surface contact without gaps or shaking. The shackle pin is locked with double anti-loosening using cotter pins and nuts. The cotter pin must be fully inserted into the pin hole and bent to lock it. The external crane needs to maintain a uniform vertical lifting speed. The lifting device of the external crane needs to be equipped with a mechanical tension gauge. The center of gravity can be judged by the difference in tension at each lifting point. If the tension at the left lifting point is higher than that at the right, it means that the center of gravity is biased to the left and the counterweight on the right needs to be added.

[0039] The working principle of the anti-tilting bottom side ring cold screen hoisting fixture provided in this embodiment is as follows: In use, the guide groove 208 of the semi-circular bottom plate 206 is vertically clamped to the reinforcing rib 301 of the bottom side ring cold screen 3, and the semi-circular bottom plate 206 is placed on the ground, ensuring its side support plate 2061 stably touches the bottom, thus completing the initial positioning of the bottom side ring cold screen 3; the lifting lug 205 of the semi-circular top plate 204 is connected to the crane lifting device via shackles, and then the external crane is operated to lift the hoisting bracket, causing the stop block 108 at the support frame 101 to clamp onto the outside of the reinforcing rib 301 and guide its descent. After the semi-circular support plate 202 contacts the semi-circular bottom plate 206, the crescent-shaped hook tongue 102 is flipped. The curved top 1021 is hooked upwards into the crescent groove 103 of the reinforcing rib 301, and then the screw bolt 107 is screwed in through the threaded hole 1051 of the U-shaped plate 105, so that the screw bolt 107 is supported in the receiving hole 1061 of the receiving plate 106. The crescent-shaped hook tongue 102 is tightly hooked into the crescent groove 103. At this time, the support frame 101 is fixed to the crescent support plate 202 through the inner wall plate 201, the side connecting plate 211, and the crescent support plate 202. The inner wall plate 201 is attached to the inner arc surface of the bottom side ring cold screen 3. At the same time, after the outer wall plate 4 is inserted into the outer arc surface of the bottom side ring cold screen 3, the inner wall plate 201 and the outer wall plate 4 are locked with bolts and nuts, completing the double-fit clamping of the bottom side ring cold screen 3. Next, the guide hole 209 of the crescent support plate 202 is aligned with the guide post 210 of the crescent bottom plate 206 and inserted, so that the arc-shaped limiting block 207 is stuck on the outer wall of the crescent support plate 202. At the same time, the counterweight medium (such as steel balls) is added from the filling port 2034 of the vertical cylinder 203, and the center of gravity of the tooling is adjusted to match the center of gravity of the bottom side ring cold screen 3. The crane is started to lift. At the moment of lifting off the ground, the crescent support plate 202 is vertically guided to rise along the guide post 210, and the reinforcing rib 301 is synchronously guided along the guide rib groove 208 of the crescent bottom plate 206 to offset the impact of the instantaneous lifting force and prevent the bottom side ring cold screen 3 from tilting. During the lifting process, the crescent-shaped hook tongue 102 of the hook mechanism 1 hooks the bottom side ring cold screen 3 towards The hoisting frame, with the inner wall panel 201 and outer wall panel 4 clamping together, restricts the radial sway of the bottom side ring cold screen 3. The frame strips 109 of the support frame 101 strengthen the structural rigidity and ensure the stability of the hoisting posture. After the bottom side ring cold screen 3 is hoisted to the installation position, the bottom mounting hole of the bottom side ring cold screen 3 is connected and fixed to the base. First, the screw bolt 107 is unscrewed, and the crescent-shaped hook tongue 102 exits the crescent groove 103 under its own weight. Then, the bolts and nuts of the inner wall panel 201 and outer wall panel 4 are unscrewed, and the outer wall panel 4 is removed. Finally, the hoisting tool is lifted upward by a crane, and the threaded column 2033 of the vertical cylinder 203 is unscrewed to discharge the counterweight medium, completing the tool recycling and reuse.

[0040] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A bottom-side ring-shaped cold shield hoisting fixture for preventing tilting, characterized in that, It includes a guide and lifting mechanism, several hook and fastening mechanisms, and an outer wall panel; the guide and lifting mechanism includes an inner wall panel, a crescent-shaped support plate, a vertical cylinder, a crescent-shaped top plate, and a crescent-shaped bottom plate. The inner wall panel is attached to the inner arc surface of the bottom side ring-shaped cold shield. Both ends of the inner wall panel are fixedly connected to the crescent-shaped support plate. The side of the crescent-shaped support plate away from the inner wall panel is fixedly connected to the crescent-shaped top plate through the vertical cylinder. The top of the crescent-shaped top plate is fixed with a lifting lug; the crescent-shaped bottom plate is clamped at the bottom end of the crescent-shaped support plate. Several guide grooves for adapting and clamping the reinforcing ribs of the bottom side ring-shaped cold shield are opened on the arc surface of both the crescent-shaped support plate and the crescent-shaped bottom plate. The hook mechanism includes a support frame, a rotating rod, and a crescent-shaped hook tongue. The support frame is fixed to the inner wall panel, the rotating rod is rotatably installed on the inner frame wall of the support frame, and the crescent-shaped hook tongue is rotatably installed inside the support frame via the rotating rod. The crescent-shaped hook tongue hooks into the crescent groove set on the reinforcing rib of the bottom side ring cold screen. The support frame is also provided with a screw bolt for supporting and locking the crescent-shaped hook tongue. The outer wall panel is clamped on the outer wall of the bottom side ring cold screen away from the inner wall panel. The inner wall panel and the outer wall panel are clamped on the side wall of the bottom side ring cold screen, and the inner wall panel and the outer wall panel are locked together.

2. The anti-tilting bottom side ring cold screen hoisting fixture according to claim 1, characterized in that, A U-shaped plate is fixed to the outer frame wall of the support frame near the rotating rod, and a receiving plate is fixed between the outer arc wall of the crescent-shaped hook tongue and the rotating rod.

3. The anti-tilting bottom side ring cold screen hoisting fixture according to claim 2, characterized in that, The receiving plate has a receiving hole, the U-shaped plate has a threaded hole, and the screw bolt is threaded into the threaded hole and supported in the receiving hole.

4. The anti-tilting bottom side ring cold screen hoisting fixture according to claim 2, characterized in that, Several frame strips are fixed between the inner frame walls of the support frame away from the U-shaped plate, and the thickness of the frame strips is the same as the thickness of the frame strips of the support frame.

5. The anti-tilting bottom side ring cold screen hoisting fixture according to claim 1, characterized in that, A stop block is fixed to the outer wall of the support frame near the crescent-shaped hook tongue, and the stop block blocks the outer side of the two ends of the crescent groove.

6. The anti-tilting bottom side ring cold screen hoisting fixture according to claim 1, characterized in that, Several guide posts are fixed to the top of the semi-finished base plate.

7. The anti-tilting bottom side ring cold screen hoisting fixture according to claim 6, characterized in that, The surface of the crescent-shaped support plate is provided with several guide holes, and the guide post is inserted into the guide holes.

8. The anti-tilting bottom side ring cold screen hoisting fixture according to claim 6, characterized in that, Several side support plates are fixed at the straight surface of the semi-circular support plate near the guide post, and at least two sets of arc-shaped limiting blocks are fixed at the top of the semi-circular support plate. The arc-shaped limiting blocks are adapted to be snapped onto the arc-shaped outer wall of the semi-circular support plate.

9. The anti-tilting bottom side ring cold screen hoisting fixture according to claim 1, characterized in that, At least two sets of side connecting plates are fixed between the two end plates of the inner wall panel away from the support frame and the crescent support plate, and the inner arc plate surface of the inner wall panel is fixedly connected to the outer arc plate surface of the crescent top plate.

10. The anti-tilting bottom side ring cold screen hoisting fixture according to claim 1, characterized in that, An inclined cylinder wall is provided at the bottom inner wall of the vertical cylinder, and a tapered pipe is fixed at the lowest point of the inclined cylinder wall. The tapered pipe is interconnected with the vertical cylinder, and a threaded post is internally threaded at the bottom of the tapered pipe. An injection port is provided on the outer cylinder wall of the vertical cylinder away from the inclined cylinder wall.

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