A method for hoisting and positioning prefabricated buildings

Abstract

This invention relates to a method for hoisting and positioning prefabricated buildings. The invention uses a positioner to replace the traditional method of workers using pry bars to drive prefabricated stairs for auxiliary positioning. This positioning method is very convenient and quick to assemble and disassemble, and no further force is required after installation, greatly reducing the labor intensity of workers. Furthermore, using a positioner reduces worker involvement, thus effectively reducing construction safety hazards. Positioning can be achieved in one step, saving positioning time and improving positioning efficiency and accuracy.

Description

Technical Field

[0001] This invention relates to the field of hoisting and positioning, and in particular to a hoisting and positioning method for prefabricated buildings. Background Technology

[0002] In prefabricated building construction, hoisting equipment is widely used. The hoisting tools and methods used are different for different prefabricated components. For example, there are many different hoisting equipment for prefabricated stairs.

[0003] For example, patent application number 202310870803.1, entitled "A Prefabricated Staircase Lifting Equipment," describes a device that, through the cooperation of a first traction rod, a second traction rod, a limiting plate, and a sliding rod, gradually corrects the position of the prefabricated staircase during lifting, thereby achieving stable lifting. Another example is patent application number 202210541339.7, entitled "A Prefabricated Staircase Lifting Device." This device, through the setting of a height adjustment mechanism and a horizontal adjustment mechanism, allows for convenient and quick adjustment of the length and horizontal distance at both ends of the wire rope 4. During lifting, the prefabricated staircase will not sway due to the flexibility of the wire rope 4, thus improving stability during lifting and transportation.

[0004] It is easy to see from the solutions proposed in the existing technologies that prefabricated stairs can currently ensure their relative stability and safety during lifting and transportation.

[0005] After the prefabricated staircase is hoisted into place, its installation on the building requires manual assistance. During this process, the four positioning holes on the prefabricated staircase must correspond one-to-one with the four pre-embedded steel bars (pre-embedded bolt rods) on the building. This operation requires at least two workers to be positioned at both ends of the prefabricated staircase and to use pry bars to assist in positioning. Although the prefabricated staircase is hoisted by a lifting device, it is essentially still suspended by the steel cables of a tower crane. The prefabricated staircase has no restrictions on its freedom of movement on the horizontal plane. When workers apply force at both ends, the prefabricated staircase may swing or rotate. This makes it difficult to position the prefabricated staircase and requires frequent repositioning. Furthermore, due to the weight of the prefabricated staircase itself, even when it is in a hoisted state, workers still need to expend a lot of physical strength to pry it. If the workers at both ends do not cooperate well, it can easily cause safety accidents such as crush injuries.

[0006] Therefore, there is an urgent need to improve the operation process at this stage in order to enhance the accuracy and stability of the prefabricated staircase and building positioning and installation process, reduce the labor intensity of workers, and reduce the safety hazards of workers during construction. Summary of the Invention

[0007] In view of the above situation and to overcome the defects of the prior art, the present invention provides a method for hoisting and positioning prefabricated buildings, which effectively solves the problems mentioned in the background art.

[0008] The technical solution to the problem includes a prefabricated building hoisting and positioning method implemented through a prefabricated building hoisting and positioning device. The prefabricated building hoisting and positioning device includes a positioning tube, with a gantry frame fixed to its upper end. A spring is fixed to the gantry frame, and a steel wire rope is connected to the free end of the spring. The free end of the steel wire rope passes through the positioning tube and is rotatably fitted with a nut. A guide tube is slidably installed inside the positioning tube, with a notch at its lower end. The nut has a protrusion that mates with the notch. The prefabricated building hoisting and positioning method includes the following steps:

[0009] S1, device adaptation, the embedded parts on the stairs are embedded bolt rods. If it is a pre-embedded steel bar, the upper end of it needs to be tapped. The pre-embedded bolt rod and nut are compatible. The outer diameter of the positioning round tube is compatible with the inner diameter of the positioning hole of the prefabricated stairs, and the length of the positioning round tube is not greater than the thickness of the prefabricated stairs.

[0010] S2, Positioner Installation: The prefabricated staircase is lifted by a tower crane and transported to the installation position. Two positioners are then installed diagonally in the positioning holes at both ends of the prefabricated staircase. Nuts and wire ropes are first passed through the positioning holes of the prefabricated staircase, and then the positioning tubes are directly inserted into the positioning holes of the prefabricated staircase. During installation, the guide tubes are kept above the positioning tubes, and the length of the wire ropes is sufficient for the lower nut to contact the corresponding pre-embedded bolt rod.

[0011] S3, Connection: The positioner is connected to the pre-embedded bolt rod by a screw thread using a nut;

[0012] S4, Precast staircase positioning: The precast staircase is moved upward by the tower crane, the steel wire rope is tightened, and the spring provides elasticity to avoid overload, until the precast staircase moves to the point where its positioning hole corresponds to the pre-embedded bolt rod, and then the precast staircase is kept suspended in this position.

[0013] S5, the positioning tube guides rigid positioning. After the positioning hole of the precast staircase corresponds with the pre-embedded bolt rod, the guide tube is lowered, and attention is paid to matching the notch on the guide tube with the protrusion on the nut.

[0014] S6. Precast staircase installation: After completion, the precast staircase is driven down by a tower crane and gradually placed on the building. After completion, the nuts are removed from the pre-embedded bolt rod by rotating the guide tube, and the locator is removed.

[0015] This invention uses a locator to replace the traditional method of workers using pry bars to drive prefabricated stairs for auxiliary positioning. The positioning is very convenient and quick to install and remove, and no further force is required after installation, which can greatly reduce the labor intensity of workers. Secondly, the use of a locator reduces the degree of worker involvement, thus effectively reducing construction safety hazards. Positioning can be achieved in one step, saving positioning time and improving positioning efficiency and accuracy. Attached Figure Description

[0016] Figure 1 This is a three-dimensional isometric view of the present invention and the installation of prefabricated stairs.

[0017] Figure 2 This is a front view of the present invention and the prefabricated staircase during installation.

[0018] Figure 3 This is a three-dimensional view of the wire rope in the slack state according to the present invention.

[0019] Figure 4 This is a three-dimensional view of the wire rope in the tightened state of the present invention. Detailed Implementation

[0020] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Depend on Figures 1 to 4 It is understood that the present invention includes a prefabricated building hoisting and positioning method implemented by a prefabricated building hoisting and positioning device. The prefabricated building hoisting and positioning device includes a positioning circular tube 1, a gantry frame 2 fixed to the upper end of the positioning circular tube 1, a spring 3 fixed to the gantry frame 2, a steel wire rope 4 connected to the free end of the spring 3, the free end of the steel wire rope 4 passing through the positioning circular tube 1 and rotatably fitted with a nut 5, a guide circular tube 6 slidably installed inside the positioning circular tube 1, a notch 7 provided at the lower end of the guide circular tube 6, and a protrusion 8 on the nut 5 that mates with the notch 7. The prefabricated building hoisting and positioning method includes the following steps:

[0022] S1, device adaptation, the embedded parts on the stairs are embedded bolt rods. If it is a pre-embedded steel bar, the upper end of it needs to be tapped. The embedded bolt rod is adapted to the nut 5. The outer diameter of the positioning round tube 1 is adapted to the inner diameter of the positioning hole of the prefabricated stairs, and the length of the positioning round tube 1 is not greater than the thickness of the prefabricated stairs.

[0023] S2, Positioner Installation: The prefabricated staircase is lifted and transported to the installation position by a tower crane and suspended above it. At this time, two positioners are taken and installed in the positioning holes at both ends of the prefabricated staircase in a diagonal manner. First, the nut 5 and the wire rope 4 are passed through the positioning holes of the prefabricated staircase. Then, the positioning tube 1 is directly inserted into the positioning hole of the prefabricated staircase. During the installation process, the guide tube 6 is kept above the positioning tube. The length of the wire rope 4 is sufficient for the nut 5 at its lower end to contact the corresponding pre-embedded bolt rod.

[0024] S3, Connection: The positioner is connected to the pre-embedded bolt rod by screwing through nut 5. This process is done manually by the worker.

[0025] S4, Precast staircase positioning: The precast staircase is driven to move upward by the tower crane. The steel wire rope 4 is tightened and the spring 3 provides elasticity to avoid overload until the precast staircase moves to the point where its positioning hole corresponds to the pre-embedded bolt rod. The precast staircase is then kept suspended in this position.

[0026] S5, the positioning tube guides rigid positioning. After the prefabricated stair positioning hole corresponds with the pre-embedded bolt rod, the guide tube 6 is lowered, and attention is paid to matching the notch 7 on the guide tube 6 with the protrusion 8 on the nut.

[0027] S6, Prefabricated staircase installation: After completion, the prefabricated staircase is driven down by the tower crane and gradually placed on the building. After completion, the nut 5 is removed from the pre-embedded bolt rod by rotating the guide tube 6, and the locator is removed.

[0028] In order to enable the installation of the gantry frame 2 and the positioning tube 1, a support plate 9 is fixed at the upper end of the positioning tube 1.

[0029] In S2, in order to enable the guide tube 6 to be positioned above the positioning tube 1, the upper end of the positioning tube 1 is provided with a support rod 10, and the side wall of the gantry frame 2 is provided with a support plate 11 that can support the support rod 10.

[0030] In order to achieve the connection between the two ends of the wire rope 4 and the spring 3, as well as the rotational connection with the nut 5, clamps are provided at both ends of the wire rope 4. The wire rope 4 is connected to the spring 3 and the nut 5 through the clamps.

[0031] The specific working process of this invention is as follows: Using appropriate locators selected according to different models of prefabricated stairs, the prefabricated stairs to be hoisted to the installation position and suspended above it by a lifting device. At this time, two locators are installed on two positioning holes diagonally opposite each other at both ends of the prefabricated stairs. The installation method involves first passing the nuts 5 and steel wire rope 4 through the positioning holes, then fixing the guide tube 6 to the support plate 11 via the support rod 10, and then directly inserting the positioning tube into the positioning holes. At this point, the steel wire rope 4 can be adjusted to any angle, and its length is sufficient for connecting the nuts 5 and the pre-embedded bolt rods. Workers screw the two nuts 5 to the corresponding two pre-embedded bolt rods to secure them. Meanwhile, the crane is controlled to move upwards, ensuring the upward movement is slow. As the crane drives the prefabricated stairs upwards, the steel wire rope 4 is tightened during this process, and simultaneously the spring... 3 will also be gradually stretched. Spring 3 provides a flexible force to prevent the bolt rod from being pulled out or broken. As the process continues, the prefabricated staircase is gradually corrected in position under the action of tension, so that the positioning hole of the prefabricated staircase corresponds to the pre-embedded bolt rod. At this time, the worker removes the guide tube 6 from the support plate 11 and adjusts the angle of the guide tube 6 so that the notch 7 on it corresponds to the protrusion 8 on the corresponding nut 5. After completion, the guide tube 6 is lowered. At this time, the lower end of the guide tube 6 contacts the building. After completion, the tower crane is driven to move the prefabricated staircase down until the prefabricated staircase contacts the building. After completion, the nut is driven by rotating the guide tube 6, so that the nut 5 on the locator after installation is divided with the pre-embedded bolt rod. After removing the locator and dividing the force between the lifting device and the prefabricated staircase, the hoisting and installation of the prefabricated staircase is completed.

[0032] The present invention has the following advantages:

[0033] 1. This invention uses a locator to replace the traditional method of workers using pry bars to drive prefabricated stairs for auxiliary positioning. The positioning is very convenient and quick to install and remove, and no further force is required after installation, which can greatly reduce the labor intensity of workers. Secondly, the use of a locator reduces the degree of worker involvement, thus effectively reducing construction safety hazards. Positioning can be achieved in one step, saving positioning time and improving positioning efficiency and accuracy.

[0034] 2. In this invention, when using a locator for positioning and installation, the steel wire rope 4 provides a flexible connection environment for the locator. Initially, the positioning holes on the prefabricated staircase do not correspond to the pre-embedded bolt rods, but the steel wire rope 4 in a flexible and relaxed state can be directly connected. After the tower crane applies force, the steel wire rope 4 gradually tends to be vertical. At this time, when the guide tube 6 is lowered, a rigid guide tube 6 is fitted on the outside of the steel wire rope 4, which would normally relax. Even if the steel wire rope 4 relaxes when the tower crane drives the prefabricated staircase to move down, the guide tube 6 can still maintain a normal rigid guiding function, avoiding the problem of the prefabricated staircase being misaligned again due to external forces during the descent after positioning, thus requiring secondary positioning.

[0035] 3. The locator in this invention has a simple structure, low production and usage costs, and is not easy to manufacture. It can be made by using existing materials on the construction site. Using this method to install prefabricated stairs can greatly improve efficiency and reduce the labor intensity and safety hazards of workers, making it suitable for widespread application.

Claims

1. A method for hoisting and positioning prefabricated buildings, characterized in that, This is achieved through a prefabricated building hoisting and positioning device, which includes a positioning tube (1), a gantry frame (2) fixed to the upper end of the positioning tube (1), a spring (3) fixed on the gantry frame (2), a steel wire rope (4) connected to the free end of the spring (3), a nut (5) rotatably installed on the free end of the steel wire rope (4) through the positioning tube (1), and a guide tube (6) slidably installed inside the positioning tube (1), with a notch (7) at the lower end of the guide tube (6), and a protrusion (8) on the nut (5) that mates with the notch (7). The prefabricated building hoisting and positioning method includes the following steps: S1, device adaptation, the embedded parts on the stairs are embedded bolt rods. If it is an embedded steel bar, the upper end of it needs to be tapped. The embedded bolt rod is adapted to the nut (5). The outer diameter of the positioning tube (1) is adapted to the inner diameter of the positioning hole of the prefabricated stairs, and the length of the positioning tube (1) is not greater than the thickness of the prefabricated stairs. S2, Positioner installation: The prefabricated staircase is lifted by a tower crane and transported to the installation position and suspended above it. At this time, two positioners are taken and installed in the positioning holes at both ends of the prefabricated staircase in a diagonal manner. First, the nut (5) and the wire rope (4) are passed through the positioning hole of the prefabricated staircase. Then, the positioning tube (1) is directly inserted into the positioning hole of the prefabricated staircase. During the installation process, the guide tube (6) is kept above the positioning tube (1). The length of the wire rope (4) is sufficient for the nut (5) at its lower end to contact the corresponding pre-embedded bolt rod. S3, Connect, use a nut (5) to connect the locator to the pre-embedded bolt rod in a spiral manner; S4, Precast staircase positioning, the precast staircase is driven to move upward by the tower crane, the steel wire rope (4) is tightened, and the spring (3) provides elastic margin to avoid overload, until the precast staircase moves to the point where its positioning hole corresponds to the pre-embedded bolt rod, and the precast staircase is kept suspended in this position; S5, positioning tube (1) rigid positioning, after the prefabricated stair positioning hole corresponds with the pre-embedded bolt rod, the guide tube (6) is put down, and pay attention to matching the notch (7) on the guide tube (6) with the protrusion (8) on the nut (5); S6, the prefabricated staircase is installed. After completion, the prefabricated staircase is driven down by the tower crane and gradually placed on the building. After completion, the nut (5) is removed from the pre-embedded bolt rod by rotating the guide tube (6) and the locator is removed.

2. The method for hoisting and positioning prefabricated buildings according to claim 1, characterized in that, A support plate (9) is fixed at the upper end of the positioning tube (1).

3. The method for hoisting and positioning prefabricated buildings according to claim 1, characterized in that, The upper end of the positioning tube (1) is provided with a support rod (10), and the side wall of the gantry frame (2) is provided with a support plate (11) that can support the support rod (10).

4. The method for hoisting and positioning prefabricated buildings according to claim 1, characterized in that, Both ends of the wire rope (4) are equipped with clamps, and the wire rope (4) is connected to the spring (3) and the nut (5) through the clamps.

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