Laminated floor slab hoisting device

Abstract

The utility model discloses a composite floor slab hoisting device which comprises a main beam, a secondary beam, a fixed pulley assembly, a steel wire rope, a movable pulley assembly and a hook, the middle parts of the secondary beams are vertically connected with the main beam, the two secondary beams which are respectively arranged close to the two end parts of the main beam are end secondary beams, and the other secondary beams are non-end secondary beams; the fixed pulley assemblies are mounted at the two ends of the non-end secondary beam; the two ends of the steel wire rope are connected with the two end secondary beams located on the same side of the main beam correspondingly, and the steel wire rope penetrates into the corresponding fixed pulley assemblies correspondingly. The movable pulley assemblies are installed on the steel wire ropes and located between the adjacent secondary beams respectively. The hook is connected with the movable pulley assembly through a hook connecting rope. When the composite floor slab hoisting device disclosed by the utility model is used for hoisting, the hoisting can be realized only by connecting the hook with the hoisting ring of the composite slab, the operation is convenient and fast, the stress is reasonable, the composite slab can be kept stable in the hoisting process, and the construction safety is ensured to the greatest extent.

Description

Technical Field

[0001] This utility model belongs to the field of composite floor slab construction technology, and in particular relates to a composite floor slab hoisting device. Background Technology

[0002] Composite floor slabs, as core components of modern prefabricated buildings, are composite floor slab structures composed of a precast concrete base slab and a cast-in-place concrete layer. This structural form combines the advantages of controllable quality of precast components and the good integrity of cast-in-place structures, and has become an important direction for the development of building industrialization. In the construction process of prefabricated buildings, the hoisting operation of composite floor slabs is a key link affecting project quality and construction efficiency, and the performance of its hoisting equipment directly affects construction safety and project progress.

[0003] Currently, the traditional methods for hoisting composite floor slabs commonly used in the industry are mainly divided into two technical solutions: direct wire rope hoisting and simple scaffolding-assisted hoisting. The direct wire rope hoisting method uses lifting machinery in conjunction with wire ropes directly connected to pre-embedded lifting rings on the floor slab for hoisting. In practice, construction workers need to configure the appropriate number of wire rope lifting points according to the size and weight of the floor slab, usually using a four-point hoisting method. Each wire rope needs to be individually adjusted to ensure balanced force, a process that is time-consuming, labor-intensive, and difficult to guarantee accuracy. In actual operation, due to the elastic deformation characteristics of the wire rope, uneven force distribution at each lifting point frequently occurs, easily leading to loss of control of the floor slab's posture in the air, resulting in dangerous situations such as tilting or even overturning. For the simple scaffolding-assisted hoisting method, some construction sites use simple welded scaffolding as a transitional device. This device is usually welded from channel steel or I-beams, and the force distribution is improved by increasing the spacing between lifting points. However, these temporary scaffoldings often lack professional calculations and standardized designs, and have inherent defects such as insufficient structural strength and unreasonable stiffness distribution. During hoisting, due to the lack of an effective force balancing mechanism, the floor slab will still deflect and sway to varying degrees, making it impossible to fundamentally solve the stability problem. Utility Model Content

[0004] The purpose of this invention is to provide a hoisting device for composite floor slabs.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A composite floor slab hoisting device, comprising: a main beam, a secondary beam, a fixed pulley assembly, a steel wire rope, a movable pulley assembly, and a hook; the length of the main beam is greater than the length of the composite floor slab; the length of the secondary beam is greater than the width of the composite floor slab; the number of secondary beams is at least three, the middle of the secondary beams is perpendicularly connected to the main beam, wherein two secondary beams located near the two ends of the main beam are end secondary beams, and the remaining secondary beams are non-end secondary beams; the fixed pulley assembly is installed at both ends of the non-end secondary beams; the two ends of the steel wire rope are respectively connected to two end secondary beams located on the same side of the main beam, and the steel wire rope is respectively threaded into the corresponding fixed pulley assembly; the movable pulley assembly is installed on the steel wire rope, and the movable pulley assembly is located between the end secondary beam and the adjacent non-end secondary beam, and between two adjacent non-end secondary beams; the hook is connected to the movable pulley assembly through a hook connecting rope.

[0006] The composite floor slab hoisting device described above further includes a hoisting sling connector installed on the main beam. The hoisting sling connector includes a main lifting lug and a first U-shaped buckle connected to the main lifting lug.

[0007] The composite floor slab hoisting device described above further includes a movable pulley assembly comprising a base, a roller, and a second U-shaped buckle. The roller is connected to one side of the base, and the second U-shaped buckle is connected to the other side of the base. The upper end of the hook connecting rope is connected to the second U-shaped buckle.

[0008] The composite floor slab hoisting device described above further includes auxiliary lifting lugs welded to both ends of the non-end secondary beams, with the fixed pulley assembly connected to the auxiliary lifting lugs via a third U-shaped buckle; auxiliary lifting lugs are welded to both ends of the end secondary beams, with the auxiliary lifting lugs connected to the third U-shaped buckle, and the end of the wire rope connected to the third U-shaped buckle.

[0009] The composite floor slab hoisting device described above further includes five secondary beams, two of which are end beams and three of which are non-end beams, with equal spacing between them; six fixed pulley assemblies and eight movable pulley assemblies.

[0010] The composite floor slab hoisting device described above further includes a main-secondary beam connecting stiffening rib, which is connected at the junction of the main beam and the secondary beam.

[0011] The composite floor slab hoisting device described above further includes, in this utility model, the main beam being an I-beam, and the main beam also including main beam stiffening ribs welded to the top plate, bottom plate, and web plate; the secondary beam being an I-beam, and the secondary beam also including secondary beam stiffening ribs welded to the top plate, bottom plate, and web plate.

[0012] The beneficial effects of this utility model are as follows: When using the composite floor slab hoisting device of this utility model, hoisting is as simple as connecting the hook to the lifting ring on the composite slab itself. Operation is convenient, the force is reasonably distributed, and the composite slab remains stable during hoisting, maximizing construction safety. Experimental data shows that this hoisting device can control the tilt angle of the composite floor slab hoisting within 3°, improving stability compared to traditional methods. Simultaneously, the modular design improves installation efficiency, shortening the single hoisting cycle time to 8-10 minutes. Attached Figure Description

[0013] The advantages of the present invention, as described above and / or in the following detailed description in conjunction with the accompanying drawings, will become clearer and more readily understood. These drawings are merely illustrative and do not limit the scope of the present invention.

[0014] Figure 1 This is a front elevation view of a composite floor slab hoisting device according to an embodiment of the present invention;

[0015] Figure 2 This is a top view schematic diagram of a composite floor slab hoisting device according to an embodiment of the present invention;

[0016] Figure 3 This is a cross-sectional schematic diagram of a composite floor slab hoisting device according to an embodiment of the present invention.

[0017] The attached diagram lists the components represented by each number as follows:

[0018] 1. Main beam, 2. Secondary beam, 3. Main lifting lug, 4. First U-shaped buckle, 5. Moving pulley assembly, 51. Base, 52. Roller, 53. Second U-shaped buckle, 6. Fixed pulley assembly, 7. Third U-shaped buckle, 8. Auxiliary lifting lug, 9. Wire rope, 10. Main and secondary beam connecting stiffening rib, 11. Main beam stiffening rib, 12. Secondary beam stiffening rib, 13. Hook. Detailed Implementation

[0019] In the following description, embodiments of the composite floor slab hoisting device of the present invention will be described with reference to the accompanying drawings.

[0020] The embodiments described herein are specific implementations of this utility model, used to illustrate the concept of this utility model. They are all illustrative and exemplary, and should not be construed as limiting the implementation methods or scope of this utility model. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein.

[0021] The accompanying drawings in this specification are schematic diagrams used to illustrate the concept of this utility model, and schematically show the shapes of the various parts and their interrelationships. Please note that, in order to clearly show the structure of the components of the embodiments of this utility model, the drawings are not drawn to the same scale. The same reference numerals are used to indicate the same parts.

[0022] Figure 1 This invention illustrates a composite floor slab hoisting device according to an embodiment of the present invention, comprising:

[0023] The main beam 1 and main lifting lugs 3 are made of I-beams, with a preferred plate thickness of 8mm to 15mm to ensure reliable strength at the lifting connection points. The length of the main beam 1 is greater than the length of the composite floor slab; preferably, the length of the main beam 1 is 1.2 to 1.5 times the length of the composite floor slab to ensure that the main beam 1 can provide hooks covering the lifting points of the composite floor slab during load-bearing and lifting operations. Figure 1 In the specific embodiment shown, a lifting machinery sling connector is installed on the main beam 1. The lifting machinery sling connector includes a main lifting lug 3 and a first U-shaped buckle 4 connected to the main lifting lug 3. The lifting machinery sling can be flexibly connected through the first U-shaped buckle 4.

[0024] Secondary beam 2, the length of which is greater than the width of the composite floor slab, preferably 1.1 to 1.3 times the width of the composite floor slab, to ensure that the secondary beam 2 can provide hooks covering the lifting points of the composite floor slab during load-bearing and hoisting; the number of secondary beams 2 is at least three, and the middle of the secondary beam 2 is perpendicularly connected to the main beam 1. Specifically, the main beam 1 and the secondary beam 2 are fixedly connected by welding to enhance the structural strength of the connection; the two secondary beams 2 located near the two ends of the main beam 1 are end secondary beams 2, and the remaining secondary beams 2 are non-end secondary beams 2; in a further preferred embodiment, such as Figure 2As shown, there are five secondary beams 2, with two at the ends and three at the non-ends, arranged at equal intervals. The preferred interval is 600mm to 1000mm to accommodate conventional composite floor slab dimensions. Corresponding to the number of secondary beams, there are six fixed pulley assemblies 6 and eight movable pulley assemblies 5. The arrangement of the movable pulley assemblies 5 and fixed pulley assemblies 6 is based on achieving optimal force distribution of the wire rope during hoisting.

[0025] A fixed pulley assembly 6 is installed at both ends of the non-end secondary beam 2. In a preferred embodiment of the composite floor slab hoisting device, auxiliary lifting lugs 8 are welded to both ends of the non-end secondary beam 2. The structural dimensions of the auxiliary lifting lugs 8 are designed according to the maximum hoisting load, typically with a plate thickness of 8mm to 12mm. The fixed pulley assembly 6 is connected to the auxiliary lifting lugs 8 via a third U-shaped buckle 7. Auxiliary lifting lugs 8 are also welded to both ends of the end secondary beam 2, and the auxiliary lifting lugs 8 are connected to the third U-shaped buckle 7. The end of the wire rope 9 is also connected to the third U-shaped buckle 7. The fixed pulley assembly 6 is connected to the auxiliary lifting lugs 8 via the third U-shaped buckle 7, facilitating disassembly and maintenance.

[0026] The steel wire rope 9 has its two ends connected to two secondary beams 2 located on the same side of the main beam 1, and each end of the steel wire rope 9 is threaded into a corresponding fixed pulley assembly 6. The steel wire rope 9 is made of high-strength galvanized steel wire rope, preferably with a diameter of 10mm to 14mm, ensuring both tensile strength and good corrosion resistance. Figure 1 The length of the wire rope is greater than the distance between the two end secondary beams 2. In the above manner, the movable pulley assembly can pull down the wire rope after it is installed on the wire rope 9. In the horizontal direction, the height of the movable pulley assembly is lower than that of the fixed pulley assembly, that is, the fixed pulley assembly is located above the movable pulley assembly.

[0027] A movable pulley assembly 5 is mounted on a wire rope 9. The movable pulley assemblies 5 are located between the end secondary beam 2 and an adjacent non-end secondary beam 2, and between two adjacent non-end secondary beams 2. The distance between each set of movable pulley assemblies 5 and the adjacent secondary beam 2 is preferably consistent to balance the forces at each point of contact. In a preferred embodiment of a composite floor slab hoisting device, as... Figure 1 As shown, the movable pulley assembly 5 includes a base 51, a roller 52, and a second U-shaped buckle 53. The roller 52 is connected to one side of the base 51, and the second U-shaped buckle 53 is connected to the other side of the base 51. The upper end of the hook 13 is connected to the second U-shaped buckle 53. The roller 52 is made of nylon or alloy material to reduce weight and reduce wire rope wear, and the base 51 is made of high-strength steel to withstand a large load.

[0028] Hook 13 is connected to the movable pulley assembly 5 via a hook 13 connecting rope. Hook 13 is made of high-strength alloy steel and has a self-locking function to prevent accidental disengagement during hoisting.

[0029] In a preferred embodiment of the composite floor slab hoisting device, such as Figure 1 , Figure 2 and Figure 3 As shown, it also includes a main-secondary beam connecting stiffener 10, which is connected at the junction of the main beam 1 and the secondary beam 2. The main-secondary beam connecting stiffener 10 is made of triangular or trapezoidal steel plate, preferably with a thickness of 8mm to 12mm, to increase the bending and torsional strength of the connection node.

[0030] In a preferred embodiment of the composite floor slab hoisting device, the main beam 1 is an I-beam, and the main beam 1 further includes main beam stiffening ribs 11 welded to the top plate, bottom plate, and web plate (e.g., ...). Figure 1 (As shown); Secondary beam 2 is an I-beam, and secondary beam 2 also includes secondary beam stiffening ribs 12 welded to the top plate, bottom plate and web plate (as shown). Figure 3 (As shown). The main beam stiffeners 11 and secondary beam stiffeners 12 are arranged every 500mm to 1000mm along the beam length to effectively prevent local buckling of the main and secondary beams when lifting heavy loads.

[0031] Typical hoisting operation process using the composite floor slab hoisting device of this utility model:

[0032] Step 1: Connect the device to the lifting machinery sling via the first U-shaped buckle on the main lifting lug 3;

[0033] Step 2: Adjust the positions of the eight movable pulley assemblies 5 so that the hooks 13 are on the same horizontal plane;

[0034] Step 3: Connect hook 13 to the pre-embedded lifting ring in the composite floor slab;

[0035] Step 4: The slings are slowly lifted, and the wire rope system automatically balances the force on each lifting point;

[0036] Step 5: After the floor slab is in place, first release the hook 13 on one side and then remove the hoisting device as a whole.

[0037] Experimental data shows that this hoisting device, through the cooperation of fixed pulley assemblies, movable pulley assemblies, and wire ropes, automatically balances the force on each hoisting point during the hoisting process via the central wire rope system. This allows the tilt angle of the composite floor slab to be controlled within 3°, improving stability compared to traditional methods. Simultaneously, the modular design increases installation efficiency, reducing the time for a single hoisting cycle to 8-10 minutes.

[0038] The technical features disclosed above are not limited to the combinations of the disclosed features with other features. Those skilled in the art can also make other combinations of the technical features according to the purpose of the utility model in order to achieve the purpose of the utility model.

Claims

1. A hoisting device for a composite floor slab, characterized in that include: The main beam (1), secondary beam (2), fixed pulley assembly (6), wire rope (9), movable pulley assembly (5), and hook (13) are provided. The length of the main beam (1) is greater than the length of the composite floor slab. The length of the secondary beam (2) is greater than the width of the composite floor slab. There are at least three secondary beams (2), and the middle of each secondary beam (2) is perpendicularly connected to the main beam (1). Two secondary beams (2) located near the two ends of the main beam (1) are end secondary beams (2), and the remaining secondary beams (2) are non-end secondary beams (2). The fixed pulley assembly (6) is provided. The wire rope (9) is installed at both ends of the non-end secondary beam (2); the two ends of the wire rope (9) are respectively connected to the two end secondary beams (2) located on the same side of the main beam (1), and the wire rope (9) is respectively inserted into the corresponding fixed pulley assembly (6); the movable pulley assembly (5) is installed on the wire rope (9), and the movable pulley assembly (5) is respectively located between the end secondary beam (2) and the adjacent non-end secondary beam (2), and between two adjacent non-end secondary beams (2); the hook (13) is connected to the movable pulley assembly (5) through the hook (13) connecting rope.

2. The device according to claim 1, wherein The main beam (1) is equipped with a lifting machinery sling connector, which includes a main lifting lug (3) and a first U-shaped buckle (4) connected to the main lifting lug (3).

3. The device of claim 2, wherein, The movable pulley assembly (5) includes a base (51), a roller (52), and a second U-shaped buckle (53). The roller (52) is connected to one side of the base (51), and the second U-shaped buckle (53) is connected to the other side of the base (51). The upper end of the hook (13) is connected to the second U-shaped buckle (53).

4. The device of claim 3, wherein, The two ends of the non-end secondary beam (2) are welded with auxiliary lifting lugs (8), and the fixed pulley assembly (6) is connected to the auxiliary lifting lugs (8) through the third U-shaped buckle (7); the two ends of the end secondary beam (2) are welded with auxiliary lifting lugs (8), the auxiliary lifting lugs (8) are connected to the third U-shaped buckle (7), and the end of the wire rope (9) is connected to the third U-shaped buckle (7).

5. The device according to any one of claims 1 to 4, wherein The number of secondary beams (2) is five, of which two are end secondary beams (2) and three are non-end secondary beams (2), and the secondary beams (2) are arranged at equal intervals; the number of fixed pulley assemblies (6) is six, and the number of movable pulley assemblies (5) is eight.

6. The device of claim 5, wherein, It also includes a main beam and secondary beam connecting stiffener (10), which is connected at the position where the main beam (1) and the secondary beam (2) are joined.

7. The suspended floor panel hoisting device according to claim 6, wherein The main beam (1) is an I-beam, and the main beam (1) also includes main beam stiffening ribs (11) welded to the top plate, bottom plate and web plate; the secondary beam (2) is an I-beam, and the secondary beam (2) also includes secondary beam stiffening ribs (12) welded to the top plate, bottom plate and web plate.

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