Automatic unhooking lifting appliance for lifting precast beam on water and lifting method

Abstract

The invention relates to an automatic unhooking sling for hoisting a precast beam on water and a hoisting method, and belongs to the technical field of slings. The automatic unhooking lifting appliance for lifting the precast beam on water comprises a lifting frame, a lifting hook, an unhooking cross beam, a first limiting piece, a second limiting piece, a third limiting piece and a fourth limiting piece, the first short rod and the second short rod are jointly used for limiting one end of the precast beam in the width direction; the third limiting piece comprises a fixing rod, and the fixing rod is vertically mounted below the other secondary beam; the fourth limiting piece comprises a fourth short rod, the fourth short rod and the fixing rod are installed below the same secondary beam and are symmetrically arranged, and the fixing rod and the fourth short rod are jointly used for limiting the other end of the prefabricated beam in the width direction. According to the automatic unhooking lifting appliance, through symmetrical arrangement of the first to fourth limiting pieces, double limiting is conducted on the prefabricated beam in the width direction, the falling position deviation caused by traditional manual debugging is avoided, and the installation precision is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of hoisting equipment, and in particular relates to an automatic unhooking hoisting equipment and a hoisting method for hoisting prefabricated beams on water. 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. The water installation working surface is narrow, and the safety risk of manual assisted installation is extremely high. In addition, the placement of the beam is not accurate enough and requires multiple debugging.

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

[0005] In view of the shortcomings in the prior art, the present invention provides an automatic unhooking hoist and a 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, thereby avoiding the positioning deviation caused by traditional manual debugging and improving the installation accuracy.

[0006] The present invention provides an automatic unhooking hoisting device for hoisting prefabricated beams on water, comprising: The hanger includes a main beam and secondary beams vertically arranged at both ends of the main beam, and both ends of the main beam are also provided with hanging 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 the main beam and is separated from the main beam; the upper parts of both ends of the unhooking beam are provided with lifting ears for connecting the auxiliary hook of the lifting equipment, and the sides of both ends of the unhooking beam are provided with hanging ears for connecting the traction hole, and a traction piece is passed between the hanging ears and the traction hole; when unhooking, the lifting equipment lifts the auxiliary hook, drives the unhooking beam to move upward, and the traction piece pulls the C-shaped hook to open outward; A first limiting member includes a first short rod, and the first short rod is vertically installed below the primary beam; The second limiting member includes a second short rod, the second short rod and the first limiting member are installed below the same primary beam and are symmetrically arranged with the first short rod, and the first short rod and the second short rod are used together to limit the width direction of one end of the precast beam; A third limiting member includes a fixing rod, which is vertically installed below another secondary beam; The fourth limiting member includes a fourth short rod. The fourth short rod and the fixed rod are installed below the same secondary beam and are symmetrically arranged with respect to the fixed rod. The fixed rod and the fourth short rod are jointly used for limiting the width direction of the other end of the precast beam.

[0007] Through the symmetrical arrangement of the first to fourth limiting members, this technical solution performs double limiting on the width direction of the precast beam, avoiding the positioning deviation caused by traditional manual debugging and improving the installation accuracy.

[0008] In some embodiments, the third limiting member further includes a movable rod for limiting the length direction of the precast beam. The movable rod 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; during hoisting, one end of the precast beam abuts against the movable rod.

[0009] Through the cooperation of the movable rod and the fixed rod, this technical solution limits the position of the precast beam in the length direction to ensure the positioning accuracy.

[0010] In some embodiments, an adjusting member is provided between the movable rod and the fixed rod. The adjusting member is used to adjust the distance between the movable rod and the fixed rod to adapt to precast beams of different lengths.

[0011] This technical solution can improve the versatility of the automatic hook - off lifting tool.

[0012] In some embodiments, the fourth limiting member further 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 side of the fourth long rod close to the fourth short rod abuts against the pile cap.

[0013] Through the setting of the fourth long rod, this technical solution ensures the accurate installation position of the precast beam and the pile cap.

[0014] In some embodiments, a stop rod is further provided at the lower end of the fourth long rod. The stop rod is perpendicularly connected to the fourth long rod, and one corner of the pile cap abuts against the right angle formed by the stop rod and the fourth long rod.

[0015] Through the right - angle limit formed by the stop rod and the fourth long rod, the pile cap is not easily displaced after abutting, improving the installation accuracy.

[0016] In some embodiments, a pin hole is further opened at the bottom of the fourth long rod. An adjusting pin is inserted into the pin hole. The adjusting pin is parallel to the stop rod and is used to adapt to pile caps of different sizes.

[0017] Through the setting of the adjusting pin, this technical solution is applicable to pile caps of different sizes and improves the applicability.

[0018] In some embodiments, an adjusting bolt is further provided at the bottom of the fourth long rod. The adjusting bolt is arranged on the side of the adjusting pin close to the pile cap and is used for limiting the pile cap.

[0019] In this technical solution, by adjusting the cooperation between the bolt and the adjusting bolt, it is ensured that the pile cap is fixed in both the horizontal and vertical directions, preventing installation deviation.

[0020] In some embodiments, the first limiting member further 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 the side close to the first short rod abuts against another pile cap to define the relative position between the precast beam and the pile cap.

[0021] In this technical solution, through the combined action of the first long rod and the fourth long rod, both ends of the precast beam are accurately aligned with the pile cap, reducing the need for debugging.

[0022] Based on the above automatic decoupling sling for hoisting precast beams on water, the present invention also provides an automatic decoupling hoisting method for hoisting precast beams on water, which is applied to the above automatic decoupling sling for hoisting precast beams on water, and includes the following steps: Lifting: Use the auxiliary hook of the lifting equipment to lift the decoupling crossbeam to open the hook; Use the main hook of the lifting equipment to lift the lifting frame and lower the lifting frame above the precast beam so that the hook falls on both sides of the precast beam. Adjust the position of the lifting frame so that the first short rod, the second short rod, the fixed rod, and the fourth short rod are respectively stuck on both sides of the precast beam; Use the auxiliary hook of the lifting equipment to lower the decoupling crossbeam to close the hook and clamp the precast beam; Use the main hook of the lifting equipment to lift. Installation: Use the main hook of the lifting equipment to move the lifting frame to move the precast beam to the preset installation position. Use the auxiliary hook of the lifting equipment to lift the decoupling crossbeam to open the hook and disengage from the precast beam, and use the lifting equipment to lift off the automatic decoupling sling.

[0023] In this technical solution, by controlling the main hook and the auxiliary hook step by step, efficient and accurate hoisting of precast beams is achieved.

[0024] In some embodiments, in the installation step, the method of moving the precast beam to the preset installation position includes: abutting the lower end of the side of the fourth long rod close to the fourth short rod against the pile cap, and abutting the lower end of the side of the first long rod close to the first short rod against another pile cap. After ensuring the accurate relative position between the precast beam and the pile cap, slowly lower the precast beam.

[0025] In this technical solution, by respectively abutting the fourth long rod and the first long rod against the pile caps on both sides, the accurate relative position between the precast beam and the pile cap is ensured, avoiding installation deviation.

[0026] Based on the above solution, the automatic hook - releasing sling and hoisting method for water - borne hoisting of precast beams in the embodiments of the present invention, through the symmetric arrangement of the first to fourth limit members, perform double - limit on the width direction of the precast beam, avoid the positioning deviation caused by traditional manual debugging, and improve the installation accuracy; through the linkage design of the C - shaped hook and the hook - releasing cross - beam, when releasing the hook, it is realized by the traction of the auxiliary hook of the hoisting equipment to achieve automatic opening and closing, without the need for manual climbing on the precast beam to release the hook, reducing the safety risk; the split - type hook - releasing cross - beam cooperates with the suspension bracket, and uses the traction member to realize the rapid opening and closing of the hook, reducing the repeated adjustment time and meeting the requirements of narrow working surfaces on water. In summary, the automatic hook - releasing sling provided by the present invention realizes automatic hook - releasing through the linkage structure of the hook and the hook - releasing cross - beam, avoiding the high - risk operation of manual climbing; uses symmetrically arranged limit members to accurately constrain the width direction of the precast beam, solving the problems of inaccurate traditional positioning and the need for multiple debuggings; the split - type hook - releasing cross - beam design combined with the traction member to quickly open and close the hook improves the working efficiency in narrow water spaces; the stable hoisting space formed by the C - shaped hook further guarantees the hoisting safety; this technical solution significantly improves the accuracy and efficiency of precast beam hoisting while reducing the safety risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute an improper limitation to the present invention. In the drawings: Figure 1 is a schematic structural diagram of the automatic hook - releasing sling for water - borne hoisting of precast beams in the embodiments of the present invention; Figure 2 is Figure 1 an enlarged schematic view of part A in Figure 3 is a schematic structural diagram of the automatic hook - releasing sling for water - borne hoisting of precast beams in another angle in the embodiments of the present invention; Figure 4 is Figure 2 an enlarged schematic view of part B in Figure 5 is a schematic structural diagram of the automatic hook - releasing hoisting method for water - borne hoisting of precast beams in the embodiments of the present invention; Figure 6 is a schematic structural diagram of the hook opening in the automatic hook - releasing hoisting method for water - borne hoisting of precast beams in the embodiments of the present invention.

[0028] In the figures: 1, suspension bracket; 2, hook - releasing cross - beam; 3, hook; 4, first limit member; 5, second limit member; 6, third limit member; 7, fourth limit member; 8, additional limit rod; 9, additional limit block; 10, main hook; 11, sling; 12, precast beam; 13, pile cap; 101, Main beam; 102, Secondary beam; 103, Extension beam; 1011, Load-bearing rod; 1012, Side ear; Connecting rod 1013; 1014, Hanging point 201, Suspension ear; 202, Hanging lug; 301, Traction hole; 302, Traction member; 401, First short rod; 402, First long rod 501, Second short rod; 601, Fixed rod; 602, Movable rod; 603, Adjusting member 71, Fourth short rod; 72, Fourth long rod; 721, Stop rod; 7211, Spacer; 722, Adjusting pin; 7221, Pin limit sleeve; 723, Adjusting bolt; 724, Pin hole; 801, Connecting plate Detailed implementation manners

[0029] Next, the technical solutions in the embodiments will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention

[0030] In the description of the present invention, it should be understood that the terms "center", "horizontal", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention

[0031] The terms "first", "second", "third", "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth" may explicitly or implicitly include one or more of such features

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations

[0033] Such as Figures 1 - 6As shown, in an embodiment of the automatic hook - releasing lifting tool and lifting method for water - borne precast beam of the present invention, the automatic hook - releasing lifting tool for water - borne precast beam includes a lifting frame 1, a hook 3, a hook - releasing cross beam 2, a first limiting member 4, a second limiting member 5, a third limiting member 6, and a fourth limiting member 7. Among them, the lifting frame 1 includes a main beam 101 and secondary beams 102 vertically arranged at both ends of the main beam 101. At both ends of the main beam 101, there are also lifting points 1014 for connecting the main hook 10 of the lifting equipment. The hook 3 is hinged to the main beam 101. The hook 3 is of a C - shaped structure. Four C - shaped hooks 3 are grouped in pairs, and are respectively installed at both ends of the lifting frame 1. 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 lifting space for the precast 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 hook - releasing cross beam 2 is arranged parallel to the main beam 101 above it and is separately arranged from the main beam 101. At the upper parts of both ends of the hook - releasing cross beam 2, there are lifting lugs 201 for connecting the auxiliary hook of the lifting equipment. The lifting lugs 201 are connected to the auxiliary hook through a sling 11. At the side parts of both ends of the hook - releasing cross beam 2, there are hanging lugs 202 for connecting the traction holes 301. A traction member 302 is passed through the hanging lugs 202 and the traction holes 301. When unhooking, the lifting equipment lifts the auxiliary hook, driving the hook - releasing cross beam 2 to move upward, and the traction member 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 one of the secondary beams 102. The second limiting member 5 includes a second short rod 501. The second short rod 501 and the first limiting member 4 are installed below the same secondary beam 102 and are symmetrically arranged with the first short rod 401. The first short rod 401 and the second short rod 501 are jointly used for limiting the width direction of one end of the precast beam 12. The third limiting member 6 includes a fixed rod 601, and the fixed rod 601 is vertically installed below the other secondary beam 102. The fourth limiting member 7 includes a fourth short rod 71. The fourth short rod 71 and the fixed rod 601 are installed below the same secondary beam 102 and are symmetrically arranged with the fixed rod 601. The fixed rod 601 and the fourth short rod 71 are jointly used for limiting the width direction of the other end of the precast beam 12.

[0034] In the above-described exemplary embodiment, the automatic hook-removing sling for hoisting precast beams on water performs double-limiting on the width direction of the precast beam 12 through the symmetric arrangement of the first to fourth limiting members, avoiding the positioning deviation caused by traditional manual debugging and improving the installation accuracy; through the linkage design of the C-shaped hook 3 and the hook-removing cross beam 2, the automatic opening and closing are realized by the traction of the auxiliary hook of the hoisting equipment during hook removal, eliminating the need for manual climbing on the precast beam 12 for hook removal and reducing the safety risk; the split hook-removing cross beam 2 cooperates with the hanger 1, and the traction member 302 is used to realize the rapid opening and closing of the hook 3, reducing the repeated adjustment time and meeting the requirements of narrow working surfaces on water. In summary, the automatic hook-removing sling provided by the present invention realizes automatic hook removal through the linkage structure of the hook 3 and the hook-removing cross beam 2, avoiding the high-risk operation of manual climbing; uses symmetrically arranged limiting members to accurately constrain the width direction of the precast beam 12, solving the problems of inaccurate traditional positioning and the need for multiple debuggings; the design of the split hook-removing cross beam 2 combined with the traction member 302 quickly opens and closes the hook 3, improving the working efficiency in narrow water spaces; the stable hoisting space formed by the C-shaped hook 3 further ensures the hoisting safety; while reducing the safety risk, the present technical solution significantly improves the accuracy and efficiency of hoisting the precast beam 12. In some embodiments, as Figure 1 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 connecting rods 1013 are provided at both ends of the load-bearing rods 1011.

[0035] In some embodiments, as Figure 3 shown, when the four C-shaped hooks 3 are hinged to the main beam 101, appropriate hinge points can be selected according to the width of the precast beam 12. As an exemplary embodiment, side ears 1012 are provided on the outer sides of the load-bearing rods 1011, and first hinge points are provided on the side ears 1012; second hinge points are provided at both ends of the connecting rod 1013; when the width of the precast beam 12 is relatively wide, the hook 3 is hinged to the main beam 101 at the first hinge point; when the width of the precast beam 12 is relatively narrow, the hook 3 is hinged to the main beam 101 at the second hinge point.

[0036] In some embodiments, as Figure 1 shown, the third limiting member 6 further includes a movable rod 602 for limiting the length direction of the precast beam 12. The movable rod 602 is installed outside the fixed rod 601, and 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. By the cooperation of the movable rod 602 and the fixed rod 601, the position in the length direction of the precast beam 12 is limited 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, and the upper part of the movable rod 602 is detachably connected to the extension beam 103. The detachable connection between the movable rod 602 and the extension beam 103 is convenient for installation and adjustment and meets the requirements of different working conditions.

[0037] In some embodiments, as Figure 1 shown, an adjusting member 603 is provided between the movable rod 602 and the fixed rod 601. The adjusting member 603 is used to adjust the distance between the movable rod 602 and the fixed rod 601 to adapt to precast beams 12 of different lengths, thereby improving the versatility of the automatic unhooking spreader. The adjusting member 603 includes at least one mounting plate. The mounting plate is T-shaped. The long side of the T-shaped mounting plate is perpendicularly connected to the fixed rod 601, and the short side is used to connect the movable rod 602. Bolt holes for mounting the movable rod 602 are provided on the short side of the T-shaped mounting plate.

[0038] In some embodiments, as Figure 1 shown, the fourth limiting member 7 further includes a fourth long rod 72 parallel to the fourth short rod 71. The plane where the fourth long rod 72 and the fourth short rod 71 are located is perpendicular to the length direction 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 side of the fourth long rod 72 close to the fourth short rod 71 abuts against the pile cap 13. Through the arrangement of the fourth long rod 72, the installation positions of the precast beam 12 and the pile cap 13 are ensured to be accurate. A reinforcing rod for reinforcement is provided between the fourth short rod 71 and the fourth long rod 72. The distance between the fourth short rod 71 and the fourth long rod 72 is set according to the installation positions and dimensions of the precast beam 12 and the pile cap 13.

[0039] In some embodiments, as Figure 4 shown, a stop rod 721 is further provided at the lower end of the fourth long rod 72. The stop rod 721 is perpendicularly connected to the fourth long rod 72. One corner of the pile cap 13 abuts against the right angle formed by the stop rod 721 and the fourth long rod 72. Through the right-angle limit formed by the stop rod 721 and the fourth long rod 72, the pile cap 13 is not easily displaced after abutting, thus improving the installation accuracy.

[0040] In some embodiments, as Figure 4 shown, a cushion block 7211 is further provided on the side of the stop rod 721 close to the pile cap 13. The cushion block 7211 is bolted to the stop rod 721.

[0041] In some embodiments, as Figure 4 shown, the bottom of the fourth long rod 72, the stop rod 721, and the lower ends of the cushion block 7211 are all bent away from the pile cap 13 to guide the pile cap 13 for limiting.

[0042] In some embodiments, as Figure 4 shown, a pin hole 724 is further provided at the bottom of the fourth long rod 72. An adjusting pin 722 is inserted into the pin hole 724. The adjusting pin 722 is parallel to the stop rod 721 and is used to adapt to pile caps 13 of different sizes. Through the arrangement of the adjusting pin 722, pile caps 13 of different sizes can be adapted, thereby improving the applicability.

[0043] In some embodiments, as Figure 2As shown, an adjusting bolt 723 is further provided at the bottom of the fourth long rod 72. The adjusting bolt 723 is arranged on the side of the adjusting pin 722 close to the pile cap 13 for limiting the pile cap 13. During hoisting, one side of the pile cap 13 abuts against the adjusting pin 722 or the stop bar 721, and the adjusting bolt 723 is tightened to realize the limit of the adjacent side. Through the cooperation of the adjusting pin 722 and the adjusting bolt 723, it is ensured that the pile cap 13 is fixed in both the horizontal and vertical directions, preventing installation deviation.

[0044] In some embodiments, as Figure 2 shown, a pin limiting sleeve 7221 for limiting the adjusting pin 722 is provided on the outer periphery of the adjusting pin 722. The pin limiting sleeve 7221 is provided with an opening. When the adjusting pin 722 is completely 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 realize the limit of the adjusting pin 722.

[0045] In some embodiments, as Figure 1 shown, the first limiting member 4 further includes a first long rod 402 parallel to the first short rod 401. The plane where the first long rod 402 and the first short rod 401 are located is perpendicular to the length direction of the main beam 101. The upper end of the first long rod 402 is fixedly connected to the secondary beam 102, and the lower end of the first long rod 402 on the side close to the first short rod 401 abuts against another pile cap 13 to limit the relative position between the precast beam 12 and the pile cap 13. Through the combined action of the first long rod 402 and the fourth long rod 72, both ends of the precast beam 12 are accurately aligned with the pile cap 13, reducing the need for debugging. A reinforcing rod for reinforcement is provided between the first short rod 401 and the first long rod 402, and 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 jointly realize the limit of the two pile caps 13 on both sides of the precast beam 12.

[0046] In some embodiments, as Figure 3 shown, additional limiting 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 limiting rods 8 are used for hoisting limit of the narrower precast beam 12. By providing the additional limiting rods 8, the limiting width is adjusted to be applicable to the narrower precast beam 12, improving the flexibility of the lifting tool.

[0047] In some embodiments, as Figure 3 shown, in order to ensure the strength of the additional limiting rods 8, connecting plates 801 are provided between the additional limiting rods 8 and the first short rod 401 and between the additional limiting rods 8 and the fourth short rod 71. The connecting plates 801 are detachably connected to the additional limiting rods 8 and the fourth short rod 71 respectively. The connecting plates 801 ensure the stability of the additional limiting rods 8, prevent deformation or loosening during hoisting, and ensure safety.

[0048] In some embodiments, as Figure 3 shown, on the side of the second short rod 501, the fixed rod 601, and the movable rod 602 close to the precast beam 12, there are detachably connected additional limit blocks 9, and the additional limit blocks 9 are used for the hoisting limit of the relatively narrow precast beam 12. By the detachable additional limit blocks 9, precast beams 12 with different widths can be adapted, avoiding the problem that traditional limit members cannot match.

[0049] In some embodiments, as Figure 3 shown, the additional limit blocks 9 are installed by bolts. When hoisting the precast beam 12, the length of the bolts is adjusted to make the additional limit blocks 9 clamp the precast beam 12. By adjusting the additional limit blocks 9, not only can the precast beam 12 be clamped, but also the relative position between the lifting tool and the pile cap 13 can be made more accurate. In some embodiments, as Figure 3 shown, the cross-section of the additional limit block 9 is a trapezoid with a wider upper part and a narrower lower part, so as to guide the precast beam 12 into the hoisting space.

[0050] Based on the above automatic decoupling lifting tool for hoisting precast beams on water, the present invention also provides an automatic decoupling hoisting method for hoisting precast beams on water, which is applied to the above automatic decoupling lifting tool for hoisting precast beams on water, and includes a hoisting step and an installation step; wherein, the hoisting step includes: as Figure 6 shown, use the auxiliary hook of the hoisting equipment to lift the decoupling cross beam 2 to open the hook 3; use the main hook 10 of the hoisting equipment to hoist the hanger 1 and lower the hanger 1 above the precast beam 12, so that the hook 3 falls on both sides of the precast beam 12, adjust the position of the hanger 1 to make the first short rod 401, the second short rod 501, the fixed rod 601, and the fourth short rod 71 respectively clamp on both sides of the precast beam 12; use the auxiliary hook of the hoisting equipment to lower the decoupling cross beam 2 to make the hook 3 close and clamp the precast beam 12; use the main hook 10 of the hoisting equipment to hoist; the installation step includes: use the main hook 10 of the hoisting equipment to move the hanger 1 to move the precast beam 12 to the preset installation position, use the auxiliary hook of the hoisting equipment to lift the decoupling cross beam 2 to make the hook 3 open and disengage from the precast beam 12, and use the hoisting equipment to lift off the automatic decoupling lifting tool.

[0051] In the above - mentioned illustrative embodiment, the automatic - hook - releasing hoisting method for hoisting precast beams on water in this embodiment, based on the aforementioned sling structure, realizes efficient and accurate hoisting of the precast beam 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 hook - releasing crossbeam 2 to open the hook 3, and the main hook 10 lowers the hanging frame 1 so that the limiting member accurately engages on both sides of the precast beam 12. After the auxiliary hook lowers, the hook 3 closes and clamps tightly 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 hook - releasing crossbeam 2 again to automatically open and release the hook 3, and the whole process does not require manual intervention. This method avoids the high risk of traditional manual climbing for hook - releasing, uses the linkage between the limiting member and the hook 3 to achieve rapid positioning and clamping of the precast beam 12, reduces the debugging time, especially adapts to the narrow working environment on water, and significantly improves the hoisting safety and efficiency.

[0052] It should be noted that in order to facilitate the hook 3 to extend into the bottom of the precast beam 12 for closing and clamping, square timbers for support are arranged at the bottom of the precast beam 12.

[0053] In some embodiments, in the hoisting step, as Figure 3 shown, when the width of the precast beam 12 is relatively wide, the hook 3 is hinged to the main beam 101 at the first hinge point; when the width of the precast beam 12 is relatively narrow, the hook 3 is hinged to the main beam 101 at the second hinge point.

[0054] In some embodiments, as Figure 5 shown, in the installation step, the method of moving the precast beam 12 to the preset installation position includes: making the lower end of the side of the fourth long rod 72 close to the fourth short rod 71 abut against the pile cap 13, and making the lower end of the side of the first long rod 402 close to the first short rod 401 abut against another pile cap 13. After ensuring the relative position between the precast beam 12 and the pile cap 13 is accurate, the precast beam 12 is slowly lowered. In this embodiment, by using the fourth long rod 72 and the first long rod 402 to abut against the two - side pile caps 13 respectively, the relative position between the precast beam 12 and the pile cap 13 is ensured to be accurate, avoiding installation deviation; after confirming the accurate position, the precast beam 12 is slowly lowered to improve the installation accuracy and reduce repeated adjustment.

[0055] In some embodiments, as Figure 5 shown, the method of moving the precast beam 12 to the preset installation position further includes: when the lower end of the side of the fourth long rod 72 close to the fourth short rod 71 abuts against the pile cap 13, simultaneously according to the size of the pile cap 13, making the stop bar 721 or the adjusting pin 722 abut against one side of the pile cap 13, and tightening the adjusting bolt 723 to ensure accurate limiting of the pile cap 13. Selecting the stop bar 721 or the adjusting pin 722 to abut against the edge of the pile cap 13 according to the size of the pile cap 13 to ensure accurate horizontal positioning; tightening the adjusting bolt 723 further fixes the pile cap 13 to prevent deviation after installation and improve stability.

[0056] In some embodiments, asFigure 3 As shown, when the width of the precast beam 12 is relatively 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 respectively connected and fixed to the adjacent first short rod 401 and fourth short rod 71 by connecting plates 801. An additional limiting block 9 is installed on the side of the second short rod 501, fixed rod 601, and movable rod 602 close to the precast beam 12. The additional limiting rod 8 and additional limiting block 9 together realize the firm hoisting of the relatively narrow precast beam 12. Installing the additional limiting rod 8 and additional limiting block 9 under the narrow beam condition ensures stable clamping and avoids the problem that traditional lifting tools cannot be adapted. 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 hoisting and ensure safety.

[0057] In some embodiments, as Figure 3 shown, during the hoisting step, when adjusting the position of the hanging frame 1, according to the size of the precast beam 12, the length of the adjusting member 603 between the fixed rod 601 and the movable rod 602 is adjusted so that the movable rod 602 is stuck at the end of the precast beam 12, realizing the limit in the length direction of the precast beam 12. By adjusting the distance between the fixed rod 601 and the movable rod 602 through the adjusting member 603, the movable rod 602 accurately clamps the end of the precast beam 12, realizing the limit in the length direction and adapting to the requirements of different beam lengths.

[0058] In some embodiments, before the hoisting step, the automatic unhooking hoisting method for hoisting precast beams on water further includes a preparation step, and the preparation step includes: assembling the automatic unhooking lifting tool 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, in order to adjust the automatic unhooking lifting tool to adapt to the actual size of the precast beam 12 and the position of the pile cap 13.

[0059] Specifically, the method for adjusting the automatic unhooking lifting tool to adapt to the actual size of the precast beam 12 and the position of the pile cap 13 includes: adjusting the bolt length of the additional limiting block 9 to make the precast beam 12 tightly clamped with the additional limiting block 9, and at the same time making the relative position relationships between the precast beam 12 and the lifting tool and the pile cap 13 conform to the installation requirements, ensuring the accurate limit of each structure of the automatic unhooking lifting tool.

[0060] It should be noted that the automatic unhooking lifting tool for hoisting precast beams on water provided in the embodiments of the present invention can adapt to precast beams 12 with different widths and lengths. When assembling the automatic unhooking lifting tool, it can be selected and matched according to the size of the precast beam 12: As a schematic embodiment, when the precast beam 12 is wide in width and long in length, the lifting hook 3 is hinged to the main beam 101 at the first hinge point. The two sides of the precast beam 12 are respectively clamped with the first short rod 401, the second short rod 501, the fixed rod 601, and the fourth short rod 71, and the end of the precast beam 12 is clamped with the movable rod 602. After the precast beam 12 is hoisted to the preset position, the stop rod 721 and the bottom of the fourth long rod 72 are abutted against the pile cap 13, and the pile cap 13 is clamped with the fourth long rod 72 by using the adjusting bolt 723. And the bottom of the first long rod 402 is abutted against another pile cap 13. As a schematic embodiment, when the precast beam 12 is narrow in width and short in length, the lifting hook 3 is hinged to the main beam 101 at the second hinge point. The additional limiting rod 8 and the additional limiting block 9 are installed. The two sides of the precast beam 12 are respectively clamped with the additional limiting rod 8 connected to the first short rod 401 and the fourth short rod 71, and the additional limiting block 9 installed on the second short rod 501 and the fixed rod 601. The adjusting member 603 is removed, and the movable rod 602 is reinstalled to a position close to the fixed rod 601. The end of the precast beam 12 is clamped with the movable rod 602. After the precast beam 12 is hoisted to the preset position, the adjusting pin 722 is inserted into the pin hole 724, and the pile cap 13 is clamped with the fourth long rod 72 by using the adjusting bolt 723. And the bottom of the first long rod 402 is abutted against another pile cap 13.

[0061] Through the description of multiple embodiments of the automatic hook - releasing hoisting tool and hoisting method for precast beams used in water in the present invention, it can be seen that the embodiments of the automatic hook - releasing hoisting tool and hoisting method for precast beams used in water in the present invention have at least one or more of the following advantages: 1. For the automatic hook - releasing hoisting tool for precast beams used in water provided by the present invention, through the symmetrical arrangement of the first to fourth limiting members, double - limiting is carried out in the width direction of the precast beam 12, avoiding the positioning deviation caused by traditional manual debugging and improving the installation accuracy.

[0062] 2. For the automatic hook - releasing hoisting tool for precast beams used in water provided by the present invention, through the linkage design of the C - type lifting hook 3 and the hook - releasing cross beam 2, the automatic opening and closing is realized by the traction of the auxiliary hook of the hoisting equipment during hook - releasing, and there is no need for manual climbing on the precast beam 12 to release the hook, reducing the safety risk.

[0063] 3. For the automatic hook - releasing hoisting tool for precast beams used in water provided by the present invention, through the cooperation of the split hook - releasing cross beam 2 and the hanger 1, the quick opening and closing of the lifting hook 3 is realized by using the traction member 302, reducing the repeated adjustment time and meeting the requirements of the narrow working surface on water.

[0064] 4. The automatic hook - releasing hoisting method for hoisting precast beams on water provided by the present invention avoids the high risk of traditional manual climbing for hook - releasing, realizes the rapid positioning and clamping of the precast beam 12 by the linkage of the limiting member and the hook 3, reduces the debugging time, is especially suitable for the narrow working environment on water, and significantly improves the hoisting safety and efficiency.

[0065] Finally, it should be noted that the embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: still modifications can be made to the specific implementation manners of the present invention or equivalent replacements can be made to some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. An automatic hook - releasing sling for hoisting precast beams on water, characterized in that, include: The hanger includes a main beam and secondary beams vertically arranged at both ends of the main beam, and both ends of the main beam are also provided with hanging 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 the main beam and is separated from the main beam; the upper parts of both ends of the unhooking beam are provided with lifting ears for connecting the auxiliary hook of the lifting equipment, and the sides of both ends of the unhooking beam are provided with hanging ears for connecting the traction hole, and a traction piece is passed between the hanging ears and the traction hole; when unhooking, the lifting equipment lifts the auxiliary hook, drives the unhooking beam to move upward, and the traction piece pulls the C-shaped hook to open outward; A first limiting member includes a first short rod, and the first short rod is vertically installed below the primary beam; The second limiting member includes a second short rod, the second short rod and the first limiting member are installed below the same primary beam and are symmetrically arranged with the first short rod, and the first short rod and the second short rod are used together to limit the width direction of one end of the precast beam; A third limiting member includes a fixing rod, which is vertically installed below another secondary beam; The fourth limiting member includes a fourth short rod. The fourth short rod and the fixing rod are installed below the same primary beam and are 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.

2. The automatic hook-release spreader for hoisting precast beams on water according to claim 1, wherein The third limiter also includes a movable rod for limiting the length direction of the precast beam. The movable rod is installed on the outside of the fixed rod. The plane where the movable rod and the fixed rod are located is parallel to the length direction of the main beam. During hoisting, one end of the precast beam is against the movable rod.

3. The automatic hook - releasing sling for hoisting precast beams on water according to claim 2, wherein, An adjusting piece is arranged between the movable rod and the fixed rod, and the adjusting piece is used to adjust the distance between the movable rod and the fixed rod to adapt to prefabricated beams of different lengths.

4. The automatic hook-release sling for waterborne hoisting of precast beams according to claim 1, wherein, 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.

5. The automatic hook-release sling for hoisting precast beams on water according to claim 4, wherein A stopper is also provided at the lower end of the fourth long rod. The stopper is vertically connected to the fourth long rod, and one corner of the pile cap abuts against a right angle formed by the stopper and the fourth long rod.

6. The automatic hook - releasing sling for hoisting precast beams on water according to claim 5, characterized in that, A latch hole is also provided at the bottom of the fourth long rod, and an adjusting latch is passed through the latch hole. The adjusting latch is parallel to the blocking rod and is used to adapt to pile caps of different sizes.

7. The automatic hook-release sling for hoisting precast beams on water according to claim 6, wherein, An adjusting bolt is also 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 for limiting the position of the pile cap.

8. The automatic hook - releasing sling for hoisting precast beams on water according to claim 1, characterized in that, 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 against another pile cap to limit the relative position of the prefabricated beam and the pile cap.

9. An automatic hook - releasing hoisting method for hoisting precast beams on water, characterized in that, The automatic unhooking hoisting device for hoisting prefabricated beams on water as claimed in any one of claims 1 to 8 comprises the following steps: Lifting: Use the auxiliary hook of the lifting equipment to lift the hook release crossbeam to open the hook; use the main hook of the lifting equipment to lift the hanger and lower the hanger above the precast beam so that the hook falls on both sides of the precast 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 stuck on both sides of the precast beam; use the auxiliary hook of the lifting equipment to lower the hook release crossbeam so that the hook closes and clamps the precast 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 precast beam to the preset installation position, use the auxiliary hook of the lifting equipment to lift the hook release crossbeam to open the hook from the precast beam, and use the lifting equipment to lift off the automatic hook release lifting tool.

10. The automatic hook - releasing hoisting method for hoisting precast beams on water according to claim 9, characterized in that, In the installation steps, the method of moving the precast beam to the preset installation position includes: making the lower end of the side of the fourth long rod close to the fourth short rod abut against the pile cap, making the lower end of the side of the first long rod close to the first short rod abut against another pile cap, and slowly lowering the precast beam after ensuring the accurate relative position between the precast beam and the pile cap.

Images