Automatic unhooking sling for hoisting prefabricated beams on water and hoisting method

Abstract

The present invention relates to an automatic unhooking sling and a hoisting method for hoisting prefabricated beams on water, and belongs to the technical field of slings. The automatic unhooking sling for hoisting prefabricated beams on water comprises a hanger, a hook, an unhooking beam, a first limiting member, a second limiting member, a third limiting member, and a fourth limiting member; wherein the first short rod and the second short rod are used together to limit the width direction of one end of the prefabricated beam; the third limiting member comprises a fixed rod, which is vertically installed below another secondary beam; the fourth limiting member comprises a fourth short rod, which is installed below the same secondary beam as the fixed rod and is symmetrically arranged with the fixed rod, and the fixed rod and the fourth short rod are used together to limit the width direction of the other end of the prefabricated beam. The automatic unhooking sling performs double limiting on the width direction of the prefabricated beam through the symmetrical arrangement of the first to fourth limiting members, thereby avoiding the placement deviation caused by traditional manual debugging and improving the installation accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of slings, and in particular relates to an automatic unhooking sling for hoisting prefabricated beams on water and a hoisting method. Background Art

[0002] There are many prefabricated beams in the upper structure of the wharf, and water operations are often required when lifting the prefabricated beams.

[0003] In the existing technology, traditional prefabricated beam lifting requires manual support to place the prefabricated beam in place. Manual unhooking requires climbing above the prefabricated beam to unhook it. The water installation working surface is narrow, and the safety risks of manual assisted installation are extremely high. In addition, the positioning of the beam is not accurate enough and requires multiple debugging.

[0004] Therefore, how to provide a high-precision automatic unhooking sling for lifting prefabricated beams on water is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides an automatic unhooking hoist and hoisting method for lifting prefabricated beams on water. Through the symmetrical arrangement of the first to fourth limiting members, the prefabricated beams are doubly limited in the width direction, avoiding the positioning deviation caused by traditional manual debugging and improving the installation accuracy.

[0006] The present invention provides an automatic unhooking hoist for hoisting prefabricated beams on water, comprising:

[0007] The hanger includes a main beam and secondary beams arranged vertically at both ends of the main beam. Both ends of the main beam are also provided with lifting points for connecting the main hook of the lifting equipment;

[0008] The hook is hinged to the main beam and has a C-shaped structure. The openings of the four C-shaped hooks form a hoisting space for the prefabricated beam. One end of the upper part of the four C-shaped hooks is hinged to the main beam, and the other end is provided with a traction hole.

[0009] The unhooking beam is arranged parallel to and separate from the main beam. The upper part of both ends of the unhooking beam is provided with lifting ears for connecting to the auxiliary hook of the lifting equipment. The side parts of both ends of the unhooking beam are provided with hanging ears for connecting to the traction holes. A traction piece is passed between the hanging ears and the traction hole. When unhooking, the lifting equipment lifts the auxiliary hook, driving the unhooking beam to move upward, and the traction piece pulls the C-shaped hook outward.

[0010] A first limiting member includes a first short rod, and the first short rod is vertically installed below the primary beam;

[0011] The second limiting member includes a second short rod, which is installed below the same primary beam as the first limiting member and is symmetrically arranged with the first short rod. The first short rod and the second short rod are used together to limit the width direction of one end of the precast beam;

[0012] A third limiting member includes a fixing rod, which is vertically installed below another secondary beam;

[0013] The fourth limiting member includes a fourth short rod. The fourth short rod and the fixed rod are installed below the same primary beam and are symmetrically arranged with the fixed rod. The fixed rod and the fourth short rod are used together to limit the width direction of the other end of the prefabricated beam.

[0014] This technical solution performs double limiting on the width direction of the prefabricated beam through the symmetrical arrangement of the first to fourth limiting members, thereby avoiding the positioning deviation caused by traditional manual debugging and improving the installation accuracy.

[0015] In some embodiments, the third limiter also includes a movable rod for limiting the length direction of the prefabricated beam, the movable rod is installed on the outside of the fixed rod, and the plane where the movable rod and the fixed rod are located is parallel to the length direction of the main beam; during lifting, one end of the prefabricated beam is against the movable rod.

[0016] This technical solution limits the position of the prefabricated beam in the length direction by cooperating with the movable rod and the fixed rod, thereby ensuring the placement accuracy.

[0017] In some embodiments, an adjusting member is provided between the movable rod and the fixed rod, and the adjusting member is used to adjust the distance between the movable rod and the fixed rod to accommodate prefabricated beams of different lengths.

[0018] This technical solution can improve the versatility of the automatic unhooking spreader.

[0019] In some embodiments, the fourth limiting member also includes a fourth long rod parallel to the fourth short rod, the plane where the fourth long rod and the fourth short rod are located is perpendicular to the length direction of the main beam, the upper end of the fourth long rod is fixedly connected to the secondary beam, and the lower end of the fourth long rod close to the fourth short rod is against the pile cap.

[0020] This technical solution ensures the accurate installation position of the prefabricated beam and the pile cap by setting the fourth long rod.

[0021] In some embodiments, a blocking rod is further provided at the lower end of the fourth long rod, the blocking rod is vertically connected to the fourth long rod, and one corner of the pile cap abuts against the right angle formed by the blocking rod and the fourth long rod.

[0022] This technical solution forms a right-angle limit through the blocking rod and the fourth long rod, so the pile cap is not easily displaced after being abutted, thereby improving the installation accuracy.

[0023] In some embodiments, a pin hole is further provided at the bottom of the fourth long rod, and an adjustment pin is passed through the pin hole. The adjustment pin is parallel to the blocking rod and is used to adapt to pile caps of different sizes.

[0024] This technical solution is suitable for pile caps of different sizes by adjusting the setting of the latch, thereby improving applicability.

[0025] In some embodiments, an adjusting bolt is further provided at the bottom of the fourth long rod. The adjusting bolt is arranged on a side of the adjusting pin close to the pile cap and is used to limit the position of the pile cap.

[0026] This technical solution ensures that the pile cap is fixed in both horizontal and vertical directions by coordinating the adjusting pins with the adjusting bolts, thereby preventing installation deviation.

[0027] In some embodiments, the first limiting member also includes a first long rod parallel to the first short rod, the plane where the first long rod and the first short rod are located is perpendicular to the length direction of the main beam, the upper end of the first long rod is fixedly connected to the secondary beam, and the lower end of the first long rod on one side close to the first short rod is abutted against another pile cap to limit the relative position of the prefabricated beam and the pile cap.

[0028] This technical solution uses the first long rod and the fourth long rod to work together to ensure that both ends of the precast beam are accurately aligned with the pile caps, reducing the need for debugging.

[0029] Based on the above-mentioned automatic unhooking sling for hoisting precast beams on water, the present invention also provides an automatic unhooking hoisting method for hoisting precast beams on water, which is applied to the above-mentioned automatic unhooking sling for hoisting precast beams on water, and includes the following steps:

[0030] Lifting: Use the auxiliary hook of the lifting equipment to lift the unhooked beam and open the hook; use the main hook of the lifting equipment to lift the hanger and lower it above the prefabricated beam so that the hooks fall on both sides of the prefabricated beam. Adjust the position of the hanger so that the first short rod, the second short rod, the fixed rod, and the fourth short rod are respectively clamped on both sides of the prefabricated beam; use the auxiliary hook of the lifting equipment to lower the unhooked beam and close the hook to clamp the prefabricated beam; use the main hook of the lifting equipment to lift;

[0031] Installation: Use the main hook of the lifting equipment to move the hanger to move the prefabricated beam to the preset installation position, use the auxiliary hook of the lifting equipment to lift the unhooking beam, open the hook and detach it from the prefabricated beam, and use the lifting equipment to lift it away from the automatic unhooking spreader.

[0032] This technical solution achieves efficient and accurate prefabricated beam lifting by controlling the main hook and auxiliary hook in steps.

[0033] In some embodiments, during the installation step, the method of moving the precast beam to a preset installation position includes: abutting the lower end of the fourth long rod on one side close to the fourth short rod against the pile cap, abutting the lower end of the first long rod on one side close to the first short rod against another pile cap, and ensuring that the relative position of the precast beam and the pile cap is accurate, and then slowly lowering the precast beam.

[0034] This technical solution uses the fourth long rod and the first long rod to respectively support the pile caps on both sides, thereby ensuring the accurate relative position of the prefabricated beam and the pile cap and avoiding installation deviation.

[0035] Based on the above scheme, the automatic unhooking lifting device and lifting method for lifting prefabricated beams on water in the embodiment of the present invention, through the symmetrical arrangement of the first to fourth limiting parts, double limit the width direction of the prefabricated beam, avoid the positioning deviation caused by traditional manual debugging, and improve the installation accuracy; through the linkage design of the C-type hook and the unhooking beam, the auxiliary hook of the lifting equipment is used to pull and automatically open and close during unhooking, without the need to manually climb the prefabricated beam to unhook, reducing safety risks; the split unhooking beam cooperates with the hanger, and uses the traction parts to realize rapid opening and closing of the hook, reducing the time for repeated adjustments and adapting to the needs of narrow working surfaces on the water. In summary, the automatic unhooking sling provided by the present invention realizes automatic unhooking through the linkage structure of the hook and the unhooking beam, avoiding the high-risk operation of manual climbing; the symmetrically arranged limiters are used to accurately constrain the width direction of the prefabricated beam, solving the problem of inaccurate traditional positioning and the need for multiple debugging; the split unhooking beam design combined with the traction part to quickly open and close the hook improves the working efficiency in narrow water spaces; the stable lifting space formed by the C-shaped hook further ensures the safety of lifting; this technical solution significantly improves the accuracy and efficiency of prefabricated beam lifting while reducing safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0037] Figure 1 Schematic diagram of the structure of an automatic unhooking hoist for hoisting prefabricated beams over water in an embodiment of the present invention;

[0038] Figure 2 for Figure 1 Enlarged schematic diagram of part A in the middle

[0039] Figure 3 2. This is a schematic structural diagram from another angle of the automatic unhooking hoist for hoisting precast beams over water according to an embodiment of the present invention;

[0040] Figure 4 for Figure 2 An enlarged schematic diagram of part B;

[0041] Figure 5 Schematic diagram of the structure of the automatic unhooking hoisting method for hoisting prefabricated beams over water in an embodiment of the present invention;

[0042] Figure 6 This is a structural schematic diagram of the hook opening in the automatic unhooking hoisting method for hoisting precast beams on water in an embodiment of the present invention.

[0043] In the picture:

[0044] 1. Hanger; 2. Unhooking beam; 3. Hook; 4. First stopper; 5. Second stopper;

[0045] 6. Third limiter; 7. Fourth limiter; 8. Additional limiter rod; 9. Additional limiter block; 10. Main hook; 11. Suspension strap; 12. Precast beam; 13. Pile cap;

[0046] 101, main beam; 102, secondary beam; 103, extension beam; 1011, load-bearing rod; 1012, side ears; connecting rod 1013; 1014, lifting point;

[0047] 201, lifting lug; 202, hanging lug; 301, traction hole; 302, traction member; 401, first short rod; 402, first long rod;

[0048] 501, second short rod; 601, fixed rod; 602, movable rod; 603, adjusting member;

[0049] 71. Fourth short rod; 72. Fourth long rod; 721. Stop rod; 7211. Spacer; 722. Adjusting pin; 7221. Pin limiting sleeve; 723. Adjusting bolt; 724. Pin hole; 801. Connecting plate. DETAILED DESCRIPTION

[0050] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be understood that the terms "center", "transverse", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0052] The terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of such features.

[0053] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0054] like Figures 1-6 As shown, in one embodiment of the automatic unhooking sling and hoisting method for hoisting precast beams on water of the present invention, the automatic unhooking sling for hoisting precast beams on water comprises a hanger 1, a hook 3, an unhooking crossbeam 2, a first limiter 4, a second limiter 5, a third limiter 6, and a fourth limiter 7; wherein the hanger 1 comprises a main beam 101 and secondary beams 102 vertically arranged at both ends of the main beam 101, and both ends of the main beam 101 are further provided with lifting points 1014 for connecting the main hook 10 of the lifting equipment; the hook 3 is hinged to the main beam 101, and the hook 3 is C The structure is composed of four C-shaped hooks 3, which are respectively installed at both ends of the hanger 1 in pairs. Each group of C-shaped hooks 3 is symmetrically arranged with the opening facing the middle. The openings of the four C-shaped hooks 3 form a hoisting space for the prefabricated beam 12; one end of the upper part of the four C-shaped hooks 3 is hinged to the main beam 101, and the other end is provided with a traction hole 301; the unhooking beam 2 is arranged parallel to the main beam 101 and is separated from the main beam 101; the upper part of the two ends of the unhooking beam 2 is provided with a lifting ear 201 for connecting the auxiliary hook of the lifting equipment, and the lifting ear 201 is connected to the auxiliary hook through the sling 11 The hook is connected, and the sides of the two ends of the unhooking beam 2 are provided with hanging ears 202 for connecting to the traction hole 301, and a traction piece 302 is passed between the hanging ear 202 and the traction hole 301; when unhooking, the lifting equipment lifts the auxiliary hook, drives the unhooking beam 2 to move up, and the traction piece 302 pulls the C-shaped hook 3 to open outward; the first limiting member 4 includes a first short rod 401, and the first short rod 401 is vertically installed below the primary beam 102; the second limiting member 5 includes a second short rod 501, and the second short rod 501 and the first limiting member 4 are installed on the same primary beam 102 , and is symmetrically arranged with the first short rod 401. The first short rod 401 and the second short rod 501 are used together to limit the width direction of one end of the precast beam 12; the third limiting member 6 includes a fixing rod 601, and the fixing rod 601 is vertically installed below another secondary beam 102; the fourth limiting member 7 includes a fourth short rod 71, and the fourth short rod 71 is installed below the same secondary beam 102 and is symmetrically arranged with the fixing rod 601. The fixing rod 601 and the fourth short rod 71 are used together to limit the width direction of the other end of the precast beam 12.

[0055] In the above-mentioned schematic embodiment, the automatic unhooking hoist for lifting prefabricated beams on water performs double limiting on the width direction of the prefabricated beam 12 through the symmetrical arrangement of the first to fourth limiting members, thereby avoiding the positioning deviation caused by traditional manual debugging and improving the installation accuracy; through the linkage design of the C-type hook 3 and the unhooking beam 2, the auxiliary hook of the lifting equipment is used to pull and automatically open and close during unhooking, and there is no need to manually climb the prefabricated beam 12 to unhook, thereby reducing safety risks; the split unhooking beam 2 cooperates with the hanger 1, and uses the traction member 302 to realize the rapid opening and closing of the hook 3, thereby reducing the time for repeated adjustments and adapting to the needs of narrow working surfaces on the water. In summary, the automatic unhooking sling provided by the present invention realizes automatic unhooking through the linkage structure of the hook 3 and the unhooking beam 2, avoiding the high-risk operation of manual climbing; the symmetrically arranged limiters are used to accurately constrain the width direction of the prefabricated beam 12, solving the problem of inaccurate traditional positioning and the need for multiple debugging; the split unhooking beam 2 design combined with the traction part 302 quickly opens and closes the hook 3, thereby improving the operating efficiency in narrow water spaces; the stable lifting space formed by the C-shaped hook 3 further ensures the safety of lifting; while reducing safety risks, this technical solution significantly improves the accuracy and efficiency of the lifting of the prefabricated beam 12.

[0056] In some embodiments, as Figure 1 As shown, the main beam 101 includes two parallel load-bearing rods 1011 and a connecting rod 1013 vertically installed between the load-bearing rods 1011 , and a connecting rod 1013 is provided at both ends of the load-bearing rods 1011 .

[0057] In some embodiments, as Figure 3 As shown, when the four C-shaped hooks 3 are hinged to the main beam 101, appropriate hinge points can be selected based on the width of the precast beam 12. As an illustrative embodiment, the outer sides of the load-bearing rods 1011 are each provided with side ears 1012, each of which defines a first hinge point; and the ends of the connecting rods 1013 define a second hinge point. When the precast beam 12 is wide, the hooks 3 are hinged to the main beam 101 at the first hinge point; when the precast beam 12 is narrow, the hooks 3 are hinged to the main beam 101 at the second hinge point.

[0058] In some embodiments, as Figure 1 As shown, the third limiting member 6 also includes a movable rod 602 for limiting the length direction of the precast beam 12. The movable rod 602 is installed on the outside of the fixed rod 601. The plane where the movable rod 602 and the fixed rod 601 are located is parallel to the length direction of the main beam 101. During hoisting, one end of the precast beam 12 abuts against the movable rod 602. The movable rod 602 cooperates with the fixed rod 601 to limit the position of the precast beam 12 in the length direction to ensure the positioning accuracy. The secondary beam 102 is provided with an extension beam 103 parallel to the length direction of the main beam 101. The upper part of the movable rod 602 is detachably connected to the extension beam 103. The movable rod 602 is detachably connected to the extension beam 103, which is convenient for installation and adjustment to meet the needs of different working conditions.

[0059] In some embodiments, as Figure 1 As shown, an adjustment member 603 is provided between the movable rod 602 and the fixed rod 601. The adjustment member 603 is used to adjust the distance between the movable rod 602 and the fixed rod 601 to accommodate precast beams 12 of varying lengths, thereby improving the versatility of the automatic unhooking sling. The adjustment member 603 includes at least one mounting plate. The mounting plate is T-shaped, with the long side of the T-shaped mounting plate perpendicularly connected to the fixed rod 601 and the short side for connecting to the movable rod 602. The short side of the T-shaped mounting plate is provided with bolt holes for mounting the movable rod 602.

[0060] In some embodiments, as Figure 1 As shown, the fourth limiting member 7 also includes a fourth long rod 72 parallel to the fourth short rod 71. The plane in which the fourth long rod 72 and the fourth short rod 71 lie is perpendicular to the length of the main beam 101. The upper end of the fourth long rod 72 is fixedly connected to the secondary beam 102, and the lower end of the fourth long rod 72 on the side closest to the fourth short rod 71 abuts against the pile cap 13. The provision of the fourth long rod 72 ensures the accurate installation position of the precast beam 12 and the pile cap 13. A reinforcement rod is provided between the fourth short rod 71 and the fourth long rod 72 for reinforcement. The distance between the fourth short rod 71 and the fourth long rod 72 is set according to the installation position and size of the precast beam 12 and the pile cap 13.

[0061] In some embodiments, as Figure 4 As shown, a stopper 721 is further provided at the lower end of the fourth long rod 72. The stopper 721 is perpendicularly connected to the fourth long rod 72, and one corner of the pile cap 13 abuts against the right angle formed by the stopper 721 and the fourth long rod 72. The stopper 721 and the fourth long rod 72 form a right angle limit, so that the pile cap 13 is not easily displaced after abutting, thereby improving installation accuracy.

[0062] In some embodiments, as Figure 4 As shown, a pad 7211 is further provided on one side of the retaining rod 721 close to the pile cap 13 , and the pad 7211 is bolted to the retaining rod 721 .

[0063] In some embodiments, as Figure 4 As shown, the bottom of the fourth long rod 72, the lower end of the blocking rod 721 and the pad 7211 are all bent away from the pile cap 13 to guide the pile cap 13 to limit its position.

[0064] In some embodiments, as Figure 4 As shown, the bottom of the fourth long rod 72 is further provided with a latch hole 724, in which an adjustment latch 722 is passed. The adjustment latch 722 is parallel to the blocking rod 721 and is used to accommodate pile caps 13 of different sizes. By adjusting the setting of the latch 722, pile caps 13 of different sizes can be adapted, thereby improving applicability.

[0065] In some embodiments, as Figure 2 As shown, an adjustment bolt 723 is also installed at the bottom of the fourth rod 72. This bolt is located on the side of the adjustment pin 722 near the pile cap 13 and serves to limit the position of the pile cap 13. During installation, one edge of the pile cap 13 abuts against the adjustment pin 722 or the stop bar 721, and the adjustment bolt 723 is tightened to limit the position of the adjacent edge. The combination of the adjustment pin 722 and the adjustment bolt 723 ensures that the pile cap 13 is fixed in both the horizontal and vertical directions, preventing installation deviation.

[0066] In some embodiments, as Figure 2 As shown, a pin limiting sleeve 7221 for limiting the adjusting pin 722 is provided on the periphery of the adjusting pin 722. The pin limiting sleeve 7221 is provided with an opening. When the adjusting pin 722 is fully inserted into the pin hole 724 and abuts against the pile cap 13, a pin shaft (not shown in the figure) is inserted into the opening of the pin limiting sleeve 7221 to achieve the limitation of the adjusting pin 722.

[0067] In some embodiments, as Figure 1 As shown, the first position-limiting member 4 also includes a first long rod 402 parallel to the first short rod 401. The plane in which the first long rod 402 and the first short rod 401 lie is perpendicular to the length of the main beam 101. The upper end of the first long rod 402 is fixedly connected to the secondary beam 102. The lower end of the first long rod 402, located on the side closest to the first short rod 401, abuts against another pile cap 13 to define the relative position of the precast beam 12 and the pile cap 13. The first long rod 402 and the fourth long rod 72 work together to precisely align the pile caps 13 at both ends of the precast beam 12, reducing the need for debugging. A reinforcement rod is provided between the first short rod 401 and the first long rod 402 for reinforcement. The distance between the first short rod 401 and the first long rod 402 is set according to the installation position and size of the precast beam 12 and the pile cap 13. The first long rod 402 and the fourth long rod 72 work together to limit the position of the two pile caps 13 on either side of the precast beam 12.

[0068] In some embodiments, as Figure 3 As shown, additional limit rods 8 are provided on the side of the first short rod 401 away from the first long rod 402, and on the side of the fourth short rod 71 away from the fourth long rod 72. The additional limit rods 8 are used to limit the hoisting position of the narrow precast beam 12. By providing the additional limit rods 8, the limit width can be adjusted to suit the narrow precast beam 12, thereby improving the flexibility of the hoist.

[0069] In some embodiments, as Figure 3 As shown, to ensure the strength of the additional limiting rod 8, connecting plates 801 are provided between the additional limiting rod 8 and the first short rod 401, and between the additional limiting rod 8 and the fourth short rod 71. The connecting plates 801 are detachably connected to the additional limiting rod 8 and the fourth short rod 71, respectively. The connecting plates 801 ensure the stability of the additional limiting rod 8, preventing deformation or loosening during hoisting, and ensuring safety.

[0070] In some embodiments, as Figure 3 As shown, the second short rod 501, the fixed rod 601, and the movable rod 602 are all provided with a detachably connected additional stopper 9 on the side near the precast beam 12. The additional stopper 9 is used to limit the hoisting position of the narrower precast beam 12. The detachable additional stopper 9 adapts to precast beams 12 of different widths, avoiding the problem of traditional stoppers being unable to match.

[0071] In some embodiments, as Figure 3 As shown, the additional limit block 9 is installed by bolts. When the precast beam 12 is hoisted, the additional limit block 9 is clamped to the precast beam 12 by adjusting the length of the bolts. By adjusting the additional limit block 9, not only the precast beam 12 can be clamped, but also the relative position of the hoisting device and the pile cap 13 can be made more accurate. In some embodiments, as Figure 3 As shown, the cross section of the additional limiting block 9 is trapezoidal in shape, being wider at the top and narrower at the bottom, so as to guide the prefabricated beam 12 into the hoisting space.

[0072] Based on the above-mentioned automatic unhooking sling for hoisting precast beams on water, the present invention also provides an automatic unhooking hoisting method for hoisting precast beams on water, which is applied to the above-mentioned automatic unhooking sling for hoisting precast beams on water, including a hoisting step and an installation step; wherein the hoisting step includes: Figure 6 As shown, the auxiliary hook of the lifting equipment is used to lift the unhooking beam 2 so that the hook 3 is opened; the main hook 10 of the lifting equipment is used to lift the hanger 1, and the hanger 1 is lowered above the prefabricated beam 12 so that the hook 3 falls on both sides of the prefabricated beam 12, and the position of the hanger 1 is adjusted so that the first short rod 401, the second short rod 501, the fixed rod 601, and the fourth short rod 71 are respectively clamped on both sides of the prefabricated beam 12; the auxiliary hook of the lifting equipment is used to lower the unhooking beam 2 so that the hook 3 is closed and clamps the prefabricated beam 12; the main hook 10 of the lifting equipment is used for lifting; the installation steps include: using the main hook 10 of the lifting equipment to move the hanger 1 to move the prefabricated beam 12 to a preset installation position, using the auxiliary hook of the lifting equipment to lift the unhooking beam 2 so that the hook 3 is opened and separated from the prefabricated beam 12, and using the lifting equipment to lift away the automatic unhooking sling.

[0073] In the above-mentioned exemplary embodiment, the automatic unhooking and hoisting method for hoisting precast beams on water in this embodiment is based on the aforementioned hoisting device structure, and realizes efficient and accurate hoisting of precast beams 12 by step-by-step control of the main hook 10 and the auxiliary hook. In the hoisting step, the auxiliary hook first lifts the unhooking beam 2 to open the hook 3, and the main hook 10 lowers the hanger 1 so that the limiter is accurately engaged with the two sides of the precast beam 12. After the auxiliary hook is lowered, the hook 3 is closed and clamped to ensure stable hoisting; in the installation step, after the main hook 10 moves the precast beam 12 to the preset position, the auxiliary hook lifts the unhooking beam 2 again so that the hook 3 automatically opens and unhooks, and no manual intervention is required throughout the process. This method avoids the high risk of traditional manual climbing and unhooking, and uses the limiter and hook 3 to realize the rapid positioning and clamping of the precast beam 12, reducing the debugging time. It is particularly suitable for narrow working environments on water and significantly improves the safety and efficiency of hoisting.

[0074] It should be noted that, in order to facilitate the hook 3 to extend into the bottom of the prefabricated beam 12 for closing and clamping, a square timber is provided at the bottom of the prefabricated beam 12 for support.

[0075] In some embodiments, during the lifting step, Figure 3 As shown, when the precast beam 12 is wider, the hook 3 and the main beam 101 are hinged at a first hinge point; when the precast beam 12 is narrower, the hook 3 and the main beam 101 are hinged at a second hinge point.

[0076] In some embodiments, as Figure 5 As shown, during the installation step, the method for moving the precast beam 12 to the preset installation position includes: abutting the lower end of the fourth long rod 72, which is closer to the fourth short rod 71, against the pile cap 13, and abutting the lower end of the first long rod 402, which is closer to the first short rod 401, against the other pile cap 13. After ensuring the relative position of the precast beam 12 and the pile cap 13 is accurate, the precast beam 12 is slowly lowered. In this embodiment, the fourth long rod 72 and the first long rod 402 respectively abut the pile caps 13 on both sides to ensure the relative position of the precast beam 12 and the pile cap 13 is accurate, thereby avoiding installation deviation. After confirming the correct position, the precast beam 12 is slowly lowered, improving installation accuracy and reducing repeated adjustments.

[0077] In some embodiments, as Figure 5 As shown, the method for moving the precast beam 12 to the preset installation position further includes: when the lower end of the fourth long rod 72 on the side closest to the fourth short rod 71 is abutted against the pile cap 13, a stop rod 721 or an adjustment pin 722 is abutted against an edge of the pile cap 13 according to the size of the pile cap 13, and an adjustment bolt 723 is tightened to ensure accurate positioning of the pile cap 13. The stop rod 721 or adjustment pin 722 is selected according to the size of the pile cap 13 to abut the edge of the pile cap 13 to ensure accurate horizontal positioning; tightening the adjustment bolt 723 further secures the pile cap 13 to prevent displacement after installation and improve stability.

[0078] In some embodiments, as Figure 3 As shown, when the width of the precast beam 12 is narrow, an additional limiting rod 8 is installed on the side of the first short rod 401 away from the first long rod 402, and an additional limiting rod 8 is installed on the side of the fourth short rod 71 away from the fourth long rod 72. The additional limiting rod 8 is connected and fixed to the first short rod 401 and the fourth short rod 71 next to it using connecting plates 801. An additional limiting block 9 is installed on the side of the second short rod 501, the fixed rod 601, and the movable rod 602 close to the precast beam 12. The additional limiting rod 8 and the additional limiting block 9 are used together to achieve the tightening and lifting of the narrow precast beam 12. The additional limiting rod 8 and the additional limiting block 9 are installed under the narrow beam working condition to ensure stable clamping and avoid the problem that traditional lifting equipment cannot adapt. At the same time, the structural strength of the additional limiting rod 8 is enhanced by the connecting plate 801 to prevent loosening or deformation during lifting and ensure safety.

[0079] In some embodiments, as Figure 3 As shown, during the lifting step, when adjusting the position of the hanger 1, the length of the adjusting member 603 between the fixed rod 601 and the movable rod 602 is adjusted according to the size of the precast beam 12, so that the movable rod 602 is clamped on the end of the precast beam 12, thereby limiting the length of the precast beam 12. The spacing between the fixed rod 601 and the movable rod 602 is adjusted by the adjusting member 603, so that the movable rod 602 accurately clamps the end of the precast beam 12, achieving length limitation and adapting to different beam length requirements.

[0080] In some embodiments, before the lifting step, the automatic unhooking lifting method for lifting precast beams on water also includes a preparation step, which includes: assembling an automatic unhooking lifting device according to the size of the precast beam 12; calculating the error between the actual position and the designed position of the pile cap 13, and calculating the deviation between the actual size and the designed size of the precast beam 12, so as to obtain the actual relative position relationship and the designed relative position relationship between the precast beam 12 and the pile cap 13, so as to adjust the automatic unhooking lifting device to adapt to the actual size of the precast beam 12 and the position of the pile cap 13.

[0081] Specifically, the method of adjusting the automatic unhooking sling to adapt to the actual size of the prefabricated beam 12 and the position of the pile cap 13 includes: adjusting the bolt length of the additional limit block 9 so that the prefabricated beam 12 is clamped with the additional limit block 9, and at the same time making the relative position relationship between the prefabricated beam 12 and the sling and pile cap 13 meet the installation requirements, ensuring the accurate limit of the structure of the automatic unhooking sling.

[0082] It should be noted that the automatic unhooking sling for hoisting precast beams on water provided in the embodiment of the present invention can adapt to precast beams 12 of different widths and lengths. When assembling the automatic unhooking sling, the size of the precast beam 12 can be selected:

[0083] As an illustrative embodiment, when the precast beam 12 is wider and longer, the hook 3 is hinged to the main beam 101 at the first hinge point, and the two sides of the precast beam 12 are clamped to the first short rod 401, the second short rod 501, the fixed rod 601, and the fourth short rod 71 respectively, and the end of the precast beam 12 is clamped to the movable rod 602; after the precast beam 12 is hoisted to the preset position, the bottom of the blocking rod 721 and the fourth long rod 72 are abutted against the pile cap 13, and the adjusting bolt 723 is used to clamp the pile cap 13 and the bottom of the first long rod 402 is abutted against another pile cap 13.

[0084] As an illustrative embodiment, when the prefabricated beam 12 is narrow in width and short in length, the hook 3 is hinged to the main beam 101 at the second hinge point, and the additional limit rod 8 and the additional limit block 9 are installed. The additional limit rod 8, the second short rod 501 and the additional limit block 9 installed on the fixed rod 601, which are respectively connected to the first short rod 401 and the fourth short rod 71 on both sides of the prefabricated beam 12, are clamped, and the adjusting piece 603 is removed. The movable rod 602 is reinstalled to a position close to the fixed rod 601, and the end of the prefabricated beam 12 is clamped to the movable rod 602; after the prefabricated beam 12 is hoisted to the preset position, the adjusting pin 722 is inserted into the pin hole 724, and the adjusting bolt 723 is used to clamp the pile cap 13 to the fourth long rod 72; and the bottom of the first long rod 402 is pressed against the other pile cap 13.

[0085] Through the description of multiple embodiments of the automatic unhooking sling and hoisting method for hoisting precast beams on water of the present invention, it can be seen that the automatic unhooking sling and hoisting method for hoisting precast beams on water of the present invention have at least one or more of the following advantages:

[0086] 1. The automatic unhooking hoist for lifting precast beams on water provided by the present invention performs double limiting on the width direction of the precast beam 12 through the symmetrical arrangement of the first to fourth limiting members, thereby avoiding the positioning deviation caused by traditional manual debugging and improving the installation accuracy.

[0087] 2. The automatic unhooking sling for lifting prefabricated beams on water provided by the present invention has a linkage design between the C-shaped hook 3 and the unhooking beam 2. When unhooking, it is automatically opened and closed by the auxiliary hook of the lifting equipment. There is no need to manually climb the prefabricated beam 12 to unhook, thereby reducing safety risks.

[0088] 3. The automatic unhooking sling for lifting prefabricated beams on water provided by the present invention cooperates with the hanger 1 through the split unhooking beam 2, and utilizes the traction member 302 to realize the rapid opening and closing of the hook 3, thereby reducing the time for repeated adjustments and adapting to the needs of narrow working surfaces on water.

[0089] 4. The automatic unhooking and lifting method for lifting prefabricated beams on water provided by the present invention avoids the high risk of traditional manual climbing and unhooking, and uses the limiter and the hook 3 to realize the rapid positioning and clamping of the prefabricated beam 12, thereby reducing the debugging time. It is particularly suitable for narrow working environments on water and significantly improves the safety and efficiency of lifting.

[0090] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0091] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the same. Although the present invention has been described in detail with reference to preferred embodiments, persons skilled in the art should understand that the specific implementation methods of the present invention may still be modified or some technical features may be replaced by equivalents without departing from the spirit of the technical solutions of the present invention, and all of these should fall within the scope of the technical solutions claimed for protection by the present invention.

Claims

1. An automatic unhooking sling for hoisting prefabricated beams on water, characterized in that: include: The hanger includes a main beam and secondary beams arranged vertically at both ends of the main beam. Both ends of the main beam are also provided with lifting points for connecting the main hook of the lifting equipment; The hook is hinged to the main beam and has a C-shaped structure. The openings of the four C-shaped hooks form a hoisting space for the prefabricated beam. One end of the upper part of the four C-shaped hooks is hinged to the main beam, and the other end is provided with a traction hole. The unhooking beam is arranged parallel to and separate from the main beam. The upper part of both ends of the unhooking beam is provided with lifting ears for connecting to the auxiliary hook of the lifting equipment. The side parts of both ends of the unhooking beam are provided with hanging ears for connecting to the traction holes. A traction piece is passed between the hanging ears and the traction hole. When unhooking, the lifting equipment lifts the auxiliary hook, driving the unhooking beam to move upward, and the traction piece pulls the C-shaped hook outward. The first limiting member includes a first short rod, which is vertically installed below the primary beam; the first limiting member also includes a first long rod parallel to the first short rod, the plane where the first long rod and the first short rod are located is perpendicular to the length direction of the main beam, the upper end of the first long rod is fixedly connected to the secondary beam, and the lower end of the first long rod on a side close to the first short rod abuts against another pile cap to limit the relative position of the precast beam and the pile cap; The second limiting member includes a second short rod, which is installed below the same primary beam as the first limiting member and is symmetrically arranged with the first short rod. The first short rod and the second short rod are used together to limit the width direction of one end of the precast beam; The third limiting member includes a fixed rod, which is installed vertically below another secondary beam; the third limiting member also includes a movable rod for limiting the length direction of the precast beam, which is installed outside the fixed rod, and the plane where the movable rod and the fixed rod are located is parallel to the length direction of the main beam; an adjusting member is provided between the movable rod and the fixed rod, and the adjusting member is used to adjust the distance between the movable rod and the fixed rod to accommodate precast beams of different lengths; The fourth limiting member includes a fourth short rod, which is installed under the same primary beam as the fixing rod and is symmetrically arranged with the fixing rod. The fixing rod and the fourth short rod are used together to limit the width direction of the other end of the precast beam; the fourth limiting member also includes a fourth long rod parallel to the fourth short rod, the plane where the fourth long rod and the fourth short rod are located is perpendicular to the length direction of the main beam, the upper end of the fourth long rod is fixedly connected to the secondary beam, and the lower end of the fourth long rod on the side close to the fourth short rod is against the pile cap; the lower end of the fourth long rod is also provided with a stop rod, which is vertically connected to the fourth long rod, and one corner of the pile cap is against the right angle formed by the stop rod and the fourth long rod; a pin hole is also provided at the bottom of the fourth long rod, and an adjusting pin is passed through the pin hole. The adjusting pin is parallel to the stop rod and is used to adapt to pile caps of different sizes; an adjusting bolt is also provided at the bottom of the fourth long rod, and the adjusting bolt is arranged on the side of the adjusting pin close to the pile cap for limiting the pile cap.

2. The automatic unhooking sling for hoisting prefabricated beams on water according to claim 1, characterized in that: During hoisting, one end of the prefabricated beam is against the movable rod.

3. An automatic unhooking hoisting method for hoisting prefabricated beams on water, characterized in that: The automatic unhooking sling for hoisting precast beams on water as claimed in any one of claims 1 to 2 comprises the following steps: Lifting: Use the auxiliary hook of the lifting equipment to lift the unhooked beam and open the hook; use the main hook of the lifting equipment to lift the hanger and lower it above the prefabricated beam so that the hooks fall on both sides of the prefabricated beam. Adjust the position of the hanger so that the first short rod, the second short rod, the fixed rod, and the fourth short rod are respectively clamped on both sides of the prefabricated beam; use the auxiliary hook of the lifting equipment to lower the unhooked beam and close the hook to clamp the prefabricated beam; use the main hook of the lifting equipment to lift; Installation: Use the main hook of the lifting equipment to move the hanger to move the prefabricated beam to the preset installation position, use the auxiliary hook of the lifting equipment to lift the unhooking beam, open the hook and detach it from the prefabricated beam, and use the lifting equipment to lift it away from the automatic unhooking spreader.

4. The automatic unhooking hoisting method for hoisting precast beams on water according to claim 3, characterized in that: During the installation step, the method of moving the prefabricated beam to the preset installation position includes: placing the lower end of the fourth long rod close to the fourth short rod against the pile cap, and placing the lower end of the first long rod close to the first short rod against another pile cap, ensuring that the relative position of the prefabricated beam and the pile cap is accurate and then slowly lowering the prefabricated beam.

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