Hoisting device and method for aerial disassembly of cab platform

Abstract

The invention discloses a hoisting device and method for aerial disassembly of a cab platform and belongs to the technical field of tower cranes, the hoisting device comprises the cab platform, first hoisting points are arranged at the first ends of the two side faces of the cab platform, second hoisting points are arranged at the second ends of the two side faces of the cab platform, and the first hoisting points and the second hoisting points are connected with hoisting tools through steel wire ropes. The length of the lifting appliance is equal to the width of the cab platform; the invention has the advantage that the efficient and rapid construction of the overall aerial disassembly of the cab platform is realized.

Description

Technical Field

[0001] The invention relates to the technical field of tower cranes, and in particular to a hoisting device and method for aerial disassembly of a driver's cab platform. Background Art

[0002] Tower cranes are essential high-altitude lifting machinery in the field of engineering construction. The tower crane cab, as the most important electrical control hub in the slewing assembly, is generally located on the cab platform on the right side of the boom.

[0003] During the erection of the tower crane, the slewing assembly is usually assembled on the ground: after the cab platform is connected and installed with the upper support, the electric control cabinet, resistor box and other electric control component cabinets are first installed on the base corresponding to the cab platform, and then the cab is hoisted above the cab platform and slowly lowered to complete the installation and fixation of the cab on the cab platform. Finally, the slewing assembly and the cab and electric control component cabinets on its platform are hoisted as a whole above the special section and installed. In this process, the overall aerial disassembly of the cab platform is generally not involved. When the working tower is dismantled, the cab platform can be disassembled in the air if necessary.

[0004] like Figure 3 As shown in the figure, the cab platform of the tower crane has the characteristics of heavy weight and large volume after the cab is installed. When the cab platform is already installed with the cab, the cab is located near the platform lifting point. When four cables are used at the four lifting points, the cab's own volume will hinder the slings and affect the normal lifting, making it impossible to dismantle the cab platform in the air when the cab is installed on the cab platform. Summary of the invention

[0005] The present invention aims to solve the technical problems mentioned in the above background technology, and provides a hoisting device and method for aerial disassembly of a driver's cab platform, which provides a feasible solution for the overall aerial disassembly of the driver's cab platform and can be universally applied in the assembly and disassembly of driver's cabs of various different tower cranes.

[0006] Based on the above purposes, the technical solution provided in the first aspect of the present invention is: a lifting device for aerial disassembly of a driver's cab platform, comprising a driver's cab platform, a first lifting point is provided at the first end of both sides of the driver's cab platform, a second lifting point is provided at the second end of both sides of the driver's cab platform, the first lifting point and the second lifting point are connected to a lifting device through a wire rope, the length of the lifting device is equal to the width of the driver's cab platform, and a hook is connected to the middle part of the upper end of the lifting device.

[0007] In some embodiments, the distance from the first hanging point to the first end portion is smaller than the distance from the second hanging point to the second end portion, and the driver's cab is fixedly connected to the upper end of the driver's cab platform close to the first end.

[0008] In some embodiments, the sling includes a crossbeam, and a first lifting ear and a second lifting ear are fixedly connected to the lower parts of both ends of the crossbeam. The first lifting ear is connected to the first lifting point and the second lifting point on the same side of the driver's cab platform through a wire rope, and the second lifting ear is connected to the first lifting point and the second lifting point on the other side of the driver's cab platform through a wire rope.

[0009] In some embodiments, a main lifting lug is fixedly connected to the middle of the upper end of the crossbeam of the sling, and the sling is connected to the lifting hook through the main lifting lug.

[0010] In some embodiments, a third lifting lug and a fourth lifting lug are fixedly connected to both sides of the upper end of the beam, and the upper end of the sling is connected to the lifting hook and the third lifting lug and the fourth lifting lug through a steel wire rope.

[0011] In some embodiments, the length of the spreader is greater than the width of the cab platform.

[0012] A second aspect of the present invention provides a method applied to the hoisting device for aerial disassembly of the driver's cab platform provided in the first aspect.

[0013] Furthermore, S1. Calculate the position of the center of gravity of the cab platform; S2. Design the positions of the first hanging point and the second hanging point, and calculate the length of the steel wire rope at the first hanging point and the length of the steel wire rope at the second hanging point; S3, connecting the first lifting point and the second lifting point on the same side of the cab platform to the first lifting lug of the sling through a steel wire rope, and connecting the first lifting point and the second lifting point on the other side of the cab platform to the second lifting lug of the sling through a steel wire rope; S4. Connect the upper end of the sling to the lifting hook through a wire rope; S5. Start the crane and control the lifting hook to rise and lift the driver's cab platform.

[0014] Furthermore, S1. Calculate the position of the center of gravity of the cab platform based on the weight distribution of the cab platform and the position of the accessories on the cab platform; S2. According to the center of gravity of the cab platform, design the positions of the first lifting point and the second lifting point, calculate the length of the wire rope at the first lifting point and the length of the wire rope at the second lifting point according to the center of gravity of the cab platform and the positions of the first lifting point and the second lifting point, to ensure that the cab platform is in a horizontal state after lifting.

[0015] Furthermore, S4. Connect the upper end of the sling to the lifting hook through a wire rope, and keep the lifting hook above the center of gravity of the driver's cab platform.

[0016] Compared with the prior art, the advantages of the present invention are: 1. By adopting a lifting beam of appropriate length and a reasonable lifting rigging layout method, the interference between the wire rope or sling and the volume of the driver's cab is avoided, and the feasibility and safety of lifting are guaranteed; 2. The overall rapid disassembly of the driver's cab platform in the slewing assembly can be carried out without returning to the ground, thereby realizing efficient and rapid construction of the overall aerial disassembly of the driver's cab platform.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 2. It is a schematic diagram of the combination of the hoisting device and the driver's cab platform according to an embodiment of the present invention; Figure 2 Schematic diagram of the lifting device of the lifting device according to the embodiment of the present invention; Figure 3 It is a schematic diagram of the combination of the prior art sling and the driver's cab platform mentioned in the background technology of the present invention.

[0019] In the attached figure: 1, driver's cab platform; 2, second lifting point; 3, first lifting point; 4, lifting equipment; 5, lifting hook; 41, crossbeam; 42, first lifting eye; 43, second lifting eye; 44, third lifting eye; 45, fourth lifting eye. DETAILED DESCRIPTION

[0020] The present invention is described in further detail below.

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0022] Combination Figure 1 , Figure 2 As shown, a resistor box, an electric control cabinet and a driver's cab are installed on the driver's cab platform 1 from left to right in sequence. The driver's cab platform 1 with the driver's cab installed has the characteristics of heavy weight and large volume. The present embodiment is a hoisting device for aerial disassembly of the driver's cab platform 1. The special hoist 4 with a crossbeam 41 designed for this hoisting condition solves the problem that the hoisting sling cannot be lifted due to being blocked by the driver's cab, and provides a feasible solution for the efficient and rapid construction of hoisting when the tower crane driver's cab platform 1 is disassembled as a whole in the air, and also effectively improves the disassembly speed of the driver's cab platform 1.

[0023] The first hanging point 3 is welded at the right end of the two sides of the cab platform 1, and two second hanging points 2 are welded at the left end. The first hanging point 3 and the second hanging point 2 are connected by steel wire ropes according to the Figure 1The first lifting eye 42 and the second lifting eye 43 of the sling 4 are connected in the manner shown. The length of the crossbeam 41 of the sling 4 is slightly greater than the width of the cab platform 1. The front and rear sides of the upper end of the crossbeam 41 are respectively fixedly connected to the third lifting eye 44 and the fourth lifting eye 45. Figure 1 , Figure 2 The lifting hook 5 and the third lifting eye 44 and the fourth lifting eye 45 are connected in the manner shown.

[0024] It should be noted that the distance from the first hanging point 3 to the right end is greater than the distance from the second hanging point 2 to the left end.

[0025] Based on the above hoisting device, this embodiment provides a method: S1. Calculate the position of the center of gravity of the cab platform 1 according to the weight distribution of the cab platform 1 and the positions of the accessories on the cab platform 1; S2. According to the center of gravity of the cab platform 1, the positions of the first hanging point 3 and the second hanging point 2 are designed. According to the center of gravity of the cab platform 1 and the positions of the first hanging point 3 and the second hanging point 2, the length of the steel wire rope of the first hanging point 3 and the length of the steel wire rope of the second hanging point 2 are calculated to ensure that the cab platform 1 is in a horizontal state after lifting; S3, connecting the first lifting point 3 and the second lifting point 2 on the same side of the cab platform 1 to the first lifting lug 42 of the sling 4 through a steel wire rope, and connecting the first lifting point 3 and the second lifting point 2 on the other side of the cab platform 1 to the second lifting lug 43 of the sling 4 through a steel wire rope; S4, connect the upper end of the sling 4 to the lifting hook 5 through a wire rope, and keep the lifting hook 5 above the center of gravity of the cab platform 1; S5, start the crane, control the lifting hook 5 to rise and lift the driver's cab platform 1.

[0026] The embodiment of the present invention adopts a hanging beam of appropriate length and a reasonable sling layout method, which not only avoids the interference between the wire rope or sling and the volume of the driver's cab, but also ensures the feasibility and safety of the lifting, and realizes the rapid disassembly of the driver's cab platform 1 in the air as a whole, and can meet the overall disassembly and assembly of the driver's cab platform 1 in the slewing assembly without returning to the ground. The analysis results and engineering practice show that the lifting method proposed by the present invention that can complete the overall aerial disassembly of the tower crane driver's cab platform 1 is technically feasible and has good safety, reliability and economy.

[0027] The embodiment of the present invention is aimed at the hoisting technology for disassembling the cab platform 1 in the air. By analyzing the layout of the lifting ears and the hoisting requirements of the cab platform 1, combined with the actual operation requirements of the tower erection site, a feasible hoisting scheme is systematically explained. The hoisting method designed by the present invention can meet the basic principles and requirements of hoisting in terms of safety, economy, and ease of operation, and has important theoretical value and practical significance for the improvement of the hoisting technology theory and actual engineering application in the tower crane assembly and disassembly scheme.

[0028] The lifting method provided in the embodiment of the present invention is not only applicable to the overall lifting of the cab platform 1 equipped with the cab in the slewing assembly, but also applicable to lifting in other similar situations when the wire rope path of the hoisting device 4 is blocked by the volume of obstacles, and provides a solution for the "modular" design and construction of lifting schemes under various lifting conditions.

[0029] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lifting device for aerial disassembly of a cab platform, comprising a cab platform (1), characterized in that: A first lifting point (3) is provided at the first end of the two side surfaces of the cab platform (1), and a second lifting point (2) is provided at the second end of the two side surfaces of the cab platform (1). The first lifting point (3) and the second lifting point (2) are connected to a lifting device (4) via a steel wire rope. The length of the lifting device (4) is equal to the width of the cab platform (1), and a lifting hook is connected to the middle of the upper end of the lifting device (4).

2. The hoisting device for aerial disassembly of the cab platform according to claim 1 is characterized in that: The distance from the first hanging point (3) to the first end is smaller than the distance from the second hanging point (2) to the second end, and the driver's cab platform (1) is fixedly connected to the upper end close to the first end.

3. The hoisting device for aerial disassembly of the cab platform according to claim 1 is characterized in that: The sling (4) comprises a crossbeam (41), and a first lifting eye (42) and a second lifting eye (43) are fixedly connected to the lower parts of both ends of the crossbeam (41), the first lifting eye (42) being connected to a first lifting point (3) and a second lifting point (2) on the same side of the driver's cab platform (1) via a steel wire rope, and the second lifting eye (43) being connected to the first lifting point (3) and the second lifting point (2) on the other side of the driver's cab platform (1) via a steel wire rope.

4. The hoisting device for aerial disassembly of the cab platform according to claim 1 is characterized in that: A main lifting lug is fixedly connected to the middle of the upper end of the cross beam (41) of the lifting device (4), and the lifting device (4) is connected to the lifting hook via the main lifting lug.

5. The hoisting device for aerial disassembly of the cab platform according to claim 1 is characterized in that: A third lifting eye (44) and a fourth lifting eye (45) are fixedly connected to both sides of the upper end of the lifting device (4), and the upper end of the lifting device (4) is connected to a lifting hook (5) and the third lifting eye (44) and the fourth lifting eye (45) via a steel wire rope.

6. The hoisting device for aerial disassembly of the cab platform according to claim 1 is characterized in that: The length of the sling (4) is greater than the width of the driver's cab platform (1).

7. A method, characterized in that: A lifting device for aerial disassembly of the driver's cab platform (1) as described in any one of claims 1 to 6.

8. The method according to claim 7, characterized in that: S1. Calculate the position of the center of gravity of the cab platform (1); S2, designing the positions of the first hanging point (3) and the second hanging point (2), and calculating the length of the steel wire rope at the first hanging point (3) and the length of the steel wire rope at the second hanging point (2); S3, connecting the first lifting point (3) and the second lifting point (2) on the same side of the cab platform (1) to the first lifting lug (42) of the sling (4) through a steel wire rope, and connecting the first lifting point (3) and the second lifting point (2) on the other side of the cab platform (1) to the second lifting lug (43) of the sling (4) through a steel wire rope; S4, connecting the upper end of the sling (4) to the lifting hook (5) via a steel wire rope; S5, start the crane, control the lifting hook (5) to rise and lift the driver's cab platform (1).

9. The method according to claim 8, characterized in that: S1. Calculate the position of the center of gravity of the cab platform (1) based on the weight distribution of the cab platform (1) and the positions of the accessories on the cab platform (1); S2. According to the center of gravity of the cab platform (1), the positions of the first lifting point (3) and the second lifting point (2) are designed. According to the center of gravity of the cab platform (1) and the positions of the first lifting point (3) and the second lifting point (2), the length of the steel wire rope at the first lifting point (3) and the length of the steel wire rope at the second lifting point (2) are calculated to ensure that the cab platform (1) is in a horizontal state after lifting.

10. The method according to claim 8, characterized in that: S4. Connect the upper end of the sling (4) to the lifting hook (5) via a steel wire rope, and keep the lifting hook (5) above the center of gravity of the cab platform (1).

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