A flange lifting tool

Abstract

The utility model provides a kind of flange hoisting tool, including frame body, lifting ring, multiple first air bags and multiple gas source pipelines.The frame body is provided with multiple accommodating grooves;Lifting ring is connected to the top of frame body, for connecting hoisting equipment.Multiple first air bags are set one by one with multiple accommodating grooves, and first air bag is installed in accommodating groove;First air bag has shrinkage state and inflation state, in shrinkage state, first air bag is contained in the inside of accommodating groove;In inflation state, first air bag at least partially protrudes with accommodating groove, and is pressed tightly in the inner hole wall surface of flange.Multiple gas source pipelines, multiple gas source pipelines are communicated one by one with multiple first air bags, and multiple gas source pipelines are configured to be connected with gas source, and controlled to fill or discharge gas to first air bag, drive first air bag to switch between shrinkage state and inflation state.The hoisting tool of the application can realize the hoisting effect close to non-destructive to flange body.

Description

Technical Field

[0001] This application relates to the field of flange lifting, and more specifically, to a flange lifting tool. Background Technology

[0002] Flanges, as a critical pipe and equipment connection component, are widely used. During equipment installation, system maintenance, and repair / replacement, there are situations where lifting equipment such as cranes and overhead cranes is needed to lift flanges. Common lifting methods include threading wire ropes or slings through bolt holes and welding temporary lifting lugs. However, these methods inevitably cause varying degrees of damage, contamination, or destruction to the flange's critical functional surfaces, such as bolt threads, sealing surfaces, or the flange's structural body. This not only affects the quality and safety of the flange connection and increases maintenance costs and timelines, but is also unsuitable for scenarios requiring non-destructive lifting of precision, high-value equipment. Utility Model Content

[0003] This application provides a flange lifting tool that can achieve a near-non-destructive lifting effect on the flange body.

[0004] Specifically, this application is implemented through the following technical solution: One aspect of this application provides a flange lifting tool, comprising: The frame has multiple receiving slots on its perimeter; Lifting rings, connected to the top of the frame, are used to connect lifting equipment; Multiple first airbags are provided in a one-to-one correspondence with multiple receiving slots, and the first airbags are installed in the receiving slots; the first airbags have a contracted state and an inflated state. In the contracted state, the first airbags are housed inside the receiving slots, allowing the frame to be inserted into or disengaged from the inner hole of the flange; in the inflated state, the first airbags at least partially protrude from the receiving slots and press against the inner wall of the flange, anchoring the frame to the flange. Multiple air source pipes are connected to multiple first airbags in a one-to-one correspondence, and the multiple air source pipes are configured to be connected to an air source and controlled to inflate or deflate gas into the first airbags, driving the first airbags to switch between the contracted state and the inflated state.

[0005] Optionally, the frame is provided with multiple mounting slots, which are located below the multiple receiving slots; Multiple pallet components are arranged one-to-one in the mounting groove, and each pallet component is connected to the inside of the mounting groove via a second airbag; The pallet has a first position and a second position. In the first position, the second airbag inflates, driving the pallet to extend at least partially out of the mounting groove to support the bottom of the flange. In the second position, the second airbag deflates, and the pallet is received within the mounting groove. The second airbag is connected to the gas source pipe to controllably inflate or deflate gas, driving the pallet to switch between the first position and the second position.

[0006] Optionally, the air source pipeline includes a first air source pipeline and a second air source pipeline that are independent of each other. The first air source pipeline is connected to the first airbag and is used to independently control the inflation and deflation of the first airbag; the second air source pipeline is connected to the second airbag and is used to independently control the inflation and deflation of the second airbag.

[0007] Optionally, the frame body has a central through hole along the axial direction; a central tube extending axially is provided in the central through hole, and the distal end of the central tube extends beyond the distal opening of the central through hole. The lumen of the central tube constitutes the second air source pipe; the outer wall of the central tube and the inner wall of the central through hole form an annular first air source pipe; the first air source pipe communicates with the airbag in the receiving slot through a channel opened on the side wall of the frame; the distal part of the central tube communicates with the second airbag in the mounting slot. The top of the frame is equipped with a first air pump and a second air pump. The first air pump is connected to the first air source pipe, and the second air pump is connected to the second air source pipe.

[0008] Optionally, the frame includes four accommodating slots evenly distributed along the circumference, and the first airbag includes four airbags, which are installed in the accommodating slots one-to-one.

[0009] Optionally, the frame includes two symmetrically arranged mounting slots, and both the tray and the second airbag are two in number, with each tray and the second airbag being installed in a corresponding mounting slot.

[0010] Optionally, the lifting ring includes a lifting ring seat, a first connecting member, and a second connecting member. The lifting ring seat is fixedly installed on the top of the frame. One end of the first connecting member is rotatably connected to the lifting ring seat along the axis. The other end of the first connecting member has a first annular hole, and the second connecting member has a second annular hole. The first annular hole and the second annular hole are sleeved on each other.

[0011] Optionally, the lifting ring seat has a shaft hole, one end of the first connector is inserted into the shaft hole, and a plurality of balls are provided between the side wall of one end of the first connector and the side wall of the shaft hole, so that the first connector and the lifting ring seat are rotatably connected along the axis.

[0012] This application provides a flange lifting tool. The flange lifting tool includes a frame, lifting rings, multiple first air bladders, and multiple air supply pipes. The air supply pipes controllably inflate the first air bladders, driving them to switch from a contracted state to an expanded state. In the expanded state, the air bladders expand radially under air pressure, at least partially protruding from the receiving groove, and their outer surfaces thus press against and fully adhere to the inner wall of the flange. This transforms traditional line contact, such as wire rope, or point contact, such as a hook, into a large-area flexible surface contact. Due to the significantly increased contact area and the uniform radial pressure, the contact pressure is greatly reduced. This effectively avoids compression and scratches on the critical functional surfaces of the flange, achieving a near-non-damaging lifting effect on the flange body. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a flange lifting tool shown in an exemplary embodiment of this application; Figure 2 This is a schematic diagram illustrating the use of a flange lifting tool according to an exemplary embodiment of this application; Figure 3 This is an internal schematic diagram of a flange lifting tool shown in an exemplary embodiment of this application; Figure 4 This is a top view of a flange lifting tool illustrated in an exemplary embodiment of this application; Figure 5 This is a direct view of the lifting ring shown in an exemplary embodiment of this application; Figure 6 This is a side view of a lifting ring shown in an exemplary embodiment of this application.

[0014] Wherein: A, flange; 100, frame; 110, receiving groove; 120, mounting groove; 200, lifting ring; 210, lifting ring seat; 220, first connecting piece; 230, second connecting piece; 300, first airbag; 400, air source pipeline; 410, first air source pipeline; 420, second air source pipeline; 500, pallet piece; 600, second airbag; 701, first air pump; 702, second air pump. Detailed Implementation

[0015] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0016] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0017] refer to Figure 1 , Figure 2 and Figure 3 This application provides a flange lifting tool, including a frame 100, a lifting ring 200, a plurality of first air bladders 300, and a plurality of air supply pipes 400. The frame 100 has a plurality of receiving grooves 110 on its circumference. The lifting ring 200 is connected to the top of the frame 100 for connecting lifting equipment. The plurality of first air bladders 300 are correspondingly arranged in one-to-one with the plurality of receiving grooves 110, and the first air bladders 300 are installed in the receiving grooves 110. The first air bladders 300 have a contracted state and an inflated state. In the contracted state, the first air bladders 300 are housed inside the receiving grooves 110, allowing the frame 100 to insert into or disengage from the inner hole of the flange A. In the inflated state, the first air bladders 300 at least partially protrude from the receiving grooves 110 and press against the inner wall of the flange A, anchoring the frame 100 to the flange A. Multiple air source pipes 400 are connected to multiple first airbags 300 in a one-to-one correspondence. The multiple air source pipes 400 are configured to be connected to an air source and controlled to inflate or deflate gas into the first airbags 300, driving the first airbags 300 to switch between a contracted state and an inflated state.

[0018] The air supply pipe 400 is controlled to inflate the first airbag 300, driving it to switch from a contracted state to an inflated state. In the inflated state, the airbag expands radially under air pressure, protruding at least partially from the receiving groove 110. Its outer surface thus presses against and fully adheres to the inner wall of flange A. This transforms traditional line contact, such as with a wire rope, or point contact, such as with a hook, into a large-area flexible surface contact. Due to the significantly increased contact area and the uniform radial pressure, the contact pressure is greatly reduced. This effectively avoids compression and scratches on the critical functional surfaces of flange A, achieving a near-damage-free lifting effect on the flange A body.

[0019] In one embodiment, the frame 100 has multiple mounting slots 120 located below multiple receiving slots 110. Multiple support plates 500 are correspondingly disposed within each mounting slot 120, each support plate 500 connected to the inside of the mounting slot 120 via a second airbag 600. Each support plate 500 has a first position and a second position. In the first position, the second airbag 600 inflates, driving the support plate 500 to extend at least partially out of the mounting slot 120 to support the bottom of the flange A. In the second position, the second airbag 600 retracts, and the support plate 500 is received within the mounting slot 120. The second airbag 600 is connected to a gas source pipe 400 to controllably inflate or deflate gas, driving the support plate 500 to switch between the first and second positions. When the second airbag 600 inflates, driving the support plate 500 to switch to the first position (extended state), the support plate 500 supports the bottom of the flange A. This supporting force, working in conjunction with the first airbag 300, not only secures flange A within the inner bore but also directly bears the vertical weight of flange A at its bottom. The addition of the pallet 500 further enhances the overall stability and safety of the lifting system.

[0020] Combination Figure 3 In one embodiment, the air source pipeline 400 includes a first air source pipeline 410 and a second air source pipeline 420 that are independent of each other. The first air source pipeline 410 is connected to the first airbag 300 and is used to independently control the inflation and deflation of the first airbag 300. The second air source pipeline 420 is connected to the second airbag 600 and is used to independently control the inflation and deflation of the second airbag 600. The independent air paths can control the actions of the first airbag 300 (main anchoring) and the second airbag 600 (auxiliary support) according to a preset logical sequence. For example, during the insertion stage into the inner hole of flange A, both airbags contract to ensure that the frame 100 is smoothly inserted into the inner hole of flange A. After insertion, the second airbag 600 is inflated first, causing the support plate 500 to extend out and support the bottom of flange A. This operation allows flange A to be initially positioned and pre-loaded. Then, the first airbag 300 is inflated, causing it to expand evenly and press against the inner wall when flange A has been initially stabilized, thus completing the main anchoring. During the release phase, the second airbag 600 first contracts, the support plate 500 retracts, and the bottom constraint is released; then the first airbag 300 contracts, releasing the radial anchoring, and finally the tool is removed. This sequential control logic makes the anchoring and release process smoother and more controllable, reducing the risk of damage to the tool or flange A due to improper operation.

[0021] In one embodiment, the frame 100 has a central through hole along the axial direction inside; a central tube extending axially is provided in the central through hole, and the distal end of the central tube extends beyond the distal opening of the central through hole; the cavity of the central tube constitutes a second air source pipe 420; an annular first air source pipe 410 is formed between the outer wall of the central tube and the inner wall of the central through hole; the first air source pipe 410 communicates with the airbag in the receiving groove 110 through a channel opened on the side wall of the frame 100; the distal part of the central tube communicates with the second airbag 600 in the mounting groove 120; a first air pump 701 and a second air pump 702 are provided on the top of the frame 100, the first air pump 701 is communicated with the first air source pipe 410, and the second air pump 702 is communicated with the second air source pipe 420.

[0022] The central tube's cavity forms an independent second air source pipe 420, dedicated to supplying air to the second airbag 600; while the annular space formed by the outer wall of the central tube and the inner wall of the central through hole forms an independent first air source pipe 410, dedicated to supplying air to the first airbag 300. The two air paths are completely isolated in physical space and are driven by the first air pump 701 and the second air pump 702 at the top of the frame 100, respectively, fundamentally avoiding crosstalk between the air paths and ensuring the reliable realization of independent control functions.

[0023] Combination Figure 4 In one embodiment, the frame 100 includes four circumferentially distributed receiving slots 110, and four first airbags 300 are installed in corresponding slots 110. The four airbags are evenly distributed circumferentially, and when they expand synchronously, the radial positive pressure exerted on the inner wall of flange A is evenly distributed circumferentially. This balanced force application effectively prevents flange A from tilting or experiencing excessive local stress during hoisting, ensuring stable hoisting posture and further improving the reliability of anchoring.

[0024] In one embodiment, the frame 100 includes two symmetrically arranged mounting slots 120, and each of the support plate 500 and the second airbag 600 includes two pieces, with each support plate 500 and the second airbag 600 installed in a corresponding position within the mounting slot 120. The two support plates 500 are symmetrically arranged, providing two stable support points sufficient to form an effective support plane to support the flange A.

[0025] Combination Figure 5 and Figure 6In one embodiment, the lifting ring 200 includes a lifting ring seat 210, a first connecting member 220, and a second connecting member 230. The lifting ring seat 210 is fixedly installed on the top of the frame 100. One end of the first connecting member 220 is rotatably connected to the lifting ring seat 210 along its axis, and the other end of the first connecting member 220 has a first annular hole. The second connecting member 230 has a second annular hole, and the first and second annular holes are interlocked. In this embodiment, the first connecting member 220 can rotate vertically about its connecting axis with the lifting ring seat 210. The second connecting member 230 can also rotate freely relative to the first connecting member 220 about the point where it is interlocked. The combination of these two rotational degrees of freedom allows the lifting hook connected to the second connecting member 230 to apply tension in any direction within a certain spatial cone angle range without forcibly transmitting lateral bending moment to the frame 100 and flange A. The ability to adjust in all directions allows the lifting device to automatically adapt to the pulling direction of the lifting hook, ensuring that the lifting force is always transmitted at the optimal angle, avoiding unnecessary bending stress on the tool and flange A, and making the lifting process smoother.

[0026] In one embodiment, the lifting ring seat 210 has a shaft hole, and one end of the first connecting member 220 is designed to insert into the shaft hole. Multiple ball bearings are arranged between the sidewall of one end of the first connecting member 220 and the sidewall of the shaft hole, allowing the first connecting member 220 and the lifting ring seat 210 to be rotatably connected along the axis. The multiple ball bearings are positioned between the shaft hole and the connecting member, and when the first connecting member 220 needs to rotate, the ball bearings roll. The rolling friction coefficient is much smaller than the sliding friction coefficient. Therefore, the structure of this embodiment can significantly reduce the frictional resistance at the rotating connection, making the rotation operation of the universal lifting ring 200 more flexible and effortless, while also helping to reduce wear on the connecting parts and extend the tool's service life.

[0027] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all 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.

Claims

1. A flange lifting tool, characterized in that, include: The frame (100) has multiple receiving slots (110) on its periphery. A lifting ring (200) is attached to the top of the frame (100) and is used to connect lifting equipment; Multiple first airbags (300) are provided one-to-one with multiple receiving slots (110), and the first airbags (300) are installed in the receiving slots (110); the first airbags (300) have a contracted state and an inflated state. In the contracted state, the first airbags (300) are housed inside the receiving slots (110), so that the frame (100) is inserted into or disengaged from the inner hole of the flange (A); in the inflated state, the first airbags (300) at least partially protrude from the receiving slots (110) and press against the inner wall of the flange (A), so that the frame (100) is anchored to the flange (A); Multiple air supply pipes (400) are connected one-to-one with multiple first airbags (300), and the multiple air supply pipes (400) are configured to be connected to an air source and controlled to inflate or deflate gas into the first airbags (300), driving the first airbags (300) to switch between the contracted state and the inflated state.

2. The flange lifting tool as described in claim 1, characterized in that, The frame (100) has multiple mounting slots (120), which are located below the multiple receiving slots (110); Multiple pallet components (500) are respectively disposed in the mounting groove (120), and each pallet component (500) is connected to the inside of the mounting groove (120) through a second airbag (600); The pallet (500) has a first position and a second position. In the first position, the second airbag (600) inflates, driving the pallet (500) to extend at least partially out of the mounting groove (120) to support the bottom of the flange (A). In the second position, the second airbag (600) contracts, and the pallet (500) is received within the mounting groove (120). The second airbag (600) is connected to the gas source pipe (400) to controllably inflate or deflate gas, driving the pallet (500) to switch between the first position and the second position.

3. The flange lifting tool as described in claim 2, characterized in that, The gas source pipeline (400) includes a first gas source pipeline (410) and a second gas source pipeline (420) that are independent of each other. The first gas source pipeline (410) is connected to the first airbag (300) and is used to independently control the inflation and deflation of the first airbag (300). The second gas source pipeline (420) is connected to the second airbag (600) and is used to independently control the inflation and deflation of the second airbag (600).

4. The flange lifting tool as described in claim 3, characterized in that, The frame (100) has a central through hole along the axial direction inside; a central tube extending axially is provided in the central through hole, and the distal end of the central tube extends beyond the distal opening of the central through hole. The lumen of the central tube constitutes the second air source pipe (420); the outer wall of the central tube and the inner wall of the central through hole form an annular first air source pipe (410); the first air source pipe (410) communicates with the airbag in the receiving groove (110) through a channel opened on the side wall of the frame (100); the distal part of the central tube communicates with the second airbag (600) in the mounting groove (120); The top of the frame (100) is provided with a first air pump (701) and a second air pump (702). The first air pump (701) is connected to the first air source pipe (410), and the second air pump (702) is connected to the second air source pipe (420).

5. The flange lifting tool as described in claim 1, characterized in that, The frame (100) includes four accommodating slots (110) evenly distributed along the circumference, and the first airbag (300) includes four, which are installed in the accommodating slots (110) in a one-to-one correspondence.

6. The flange lifting tool as described in claim 2, characterized in that, The frame (100) includes two symmetrically arranged mounting slots (120), and each of the tray (500) and the second airbag (600) includes two, and the tray (500) and the second airbag (600) are installed in the mounting slots (120) one by one.

7. The flange lifting tool as described in any one of claims 1 to 6, characterized in that, The lifting ring (200) includes a lifting ring seat (210), a first connecting member (220), and a second connecting member (230). The lifting ring seat (210) is fixedly installed on the top of the frame (100). One end of the first connecting member (220) is rotatably connected to the lifting ring seat (210) along the axis. The other end of the first connecting member (220) is provided with a first ring hole. The second connecting member (230) is provided with a second ring hole. The first ring hole and the second ring hole are sleeved on each other.

8. The flange lifting tool as described in claim 7, characterized in that, The lifting ring seat (210) has a shaft hole, one end of the first connector (220) is inserted into the shaft hole, and a plurality of balls are provided between the side wall of one end of the first connector (220) and the side wall of the shaft hole, so that the first connector (220) and the lifting ring seat (210) are rotatably connected along the axis.

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