Quick positioning device for fabricated laminated slab and installation construction method

Abstract

This invention relates to the field of prefabricated building construction technology, and particularly to a rapid positioning device and installation method for prefabricated composite slabs. The device includes: a positioning frame; a hanging assembly for connecting to a hook on a tower crane at the top of the positioning frame; a lateral moving assembly at the bottom of the positioning frame; a longitudinal moving assembly at the bottom of the moving end of the lateral moving assembly; a hook assembly for attaching the prefabricated composite slab to the bottom of the moving end of the longitudinal moving assembly; and a leveling assembly for adjusting the levelness of the prefabricated composite slab at the bottom of the moving end of the longitudinal moving assembly. This invention provides a rapid positioning device and installation method for prefabricated composite slabs that significantly improves the installation accuracy of the slabs.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building construction technology, and in particular to a rapid positioning device and installation method for prefabricated composite slabs. Background Technology

[0002] Prefabricated construction, as an important development direction of building industrialization, is widely used in residential, public, and industrial buildings due to its advantages such as fast construction speed, controllable quality, energy saving, and environmental protection. Prefabricated composite slabs, as commonly used floor components in prefabricated construction, directly affect the overall structural quality and construction progress through their installation accuracy and construction efficiency.

[0003] In existing prefabricated composite slab installation processes, tower cranes are typically used to hoist the slabs to the designed position, followed by manual adjustment of their position and elevation using tools such as crowbars and shims. This method has the following drawbacks: (1) Low positioning accuracy Traditional manual adjustment methods are greatly affected by the operator's experience, making it difficult to achieve precise control over the front-to-back, left-to-right, and horizontal states of the composite slabs. This can easily lead to cumulative errors and affect the overall quality of the structure.

[0004] (2) Low construction efficiency The composite slabs require multiple lifting and repeated adjustments during the hoisting and positioning process, resulting in a long construction period and making it difficult to meet the requirements of rapid construction for prefabricated buildings.

[0005] (3) High labor intensity and high safety risks Construction workers need to perform manual straightening and calibration operations at high altitudes, which is labor-intensive and poses safety hazards such as swaying and slippage of the composite slabs.

[0006] (4) Lack of integrated positioning device Existing technologies lack a rapid positioning device that can simultaneously achieve precise lateral, longitudinal, and horizontal adjustments of the composite slabs during hoisting, resulting in a high degree of reliance on manual intervention during construction. Summary of the Invention

[0007] The purpose of this invention is to provide a rapid positioning device and installation method for prefabricated composite panels to solve the technical problems existing in the background art.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: A rapid positioning device for prefabricated composite slabs includes: a positioning frame, a hanging assembly for connecting to a hook on a tower crane at the top of the positioning frame, a lateral moving assembly at the bottom of the positioning frame, a longitudinal moving assembly at the bottom of the moving end of the lateral moving assembly, a hook assembly for hooking the prefabricated composite slab onto the hook assembly at the bottom of the moving end of the longitudinal moving assembly, and a leveling adjustment assembly for adjusting the levelness of the prefabricated composite slab at the bottom of the moving end of the longitudinal moving assembly.

[0009] Furthermore, the suspension assembly includes steel cables and hanging rings; the positioning frame includes a horizontal rectangular plate and a vertical rectangular plate, with two vertical rectangular plates symmetrically fixedly connected to the bottom left and right sides of the horizontal rectangular plate; a plurality of steel cables are provided, with one end of each cable evenly fixedly connected to the top four sides of the horizontal rectangular plate, and the other end of each cable fixedly connected to a hanging ring, which cooperates with the hook on the tower crane.

[0010] Furthermore, the lateral movement component includes: a first T-shaped slider, a support member, a sleeve, and a lateral movement block. A first T-shaped groove is horizontally arranged at the center of the bottom end of the horizontal rectangular plate. Two first T-shaped sliders, a support member, and two sleeves are provided. The two sleeves are respectively fixedly connected to the bottom ends of the two first T-shaped sliders via two support members. The two first T-shaped sliders are laterally slidably connected within the first T-shaped groove. The sleeve is located below the horizontal rectangular plate. The lateral movement block is rectangular, and the bottom ends of the two sleeves are symmetrically fixedly connected to the left and right sides of the top end of the lateral movement block. A lateral drive component for driving the lateral movement block to move laterally is provided at the bottom end of the positioning frame.

[0011] Furthermore, the lateral drive assembly includes: a first motor and a lead screw, the lead screw passing through and threadedly connected to two sleeves respectively, one end of the lead screw being rotatably connected to the left vertical rectangular plate, the first motor being fixedly installed on the outer end of the right vertical rectangular plate, and the output shaft of the first motor passing through and rotatably connected to the right vertical rectangular plate and coaxially fixedly connected to the other end of the lead screw.

[0012] Furthermore, the longitudinal moving component includes: a second T-shaped slider and a longitudinal moving block. The bottom left and right sides of the transverse moving block are symmetrically provided with two longitudinally arranged second T-shaped grooves. There are two second T-shaped sliders. The longitudinal moving block is rectangular. The two second T-shaped sliders are symmetrically fixedly connected to the top left and right sides of the longitudinal moving block. The two second T-shaped sliders are respectively longitudinally slidably connected in the two second T-shaped grooves. A longitudinal driving component for driving the longitudinal moving block to move longitudinally is provided between the transverse moving block and the longitudinal moving block.

[0013] Furthermore, the longitudinal drive assembly includes: a second motor, a gear, and a rack. Two second motors, gears, and racks are symmetrically arranged on the left and right sides. Two racks are symmetrically fixedly connected to the top left and right sides of the longitudinal moving block. Two second motors are symmetrically fixedly installed on the left and right sides of the transverse moving block. Two gears are fixedly installed on the output shafts of the two second motors respectively, and the two gears mesh with the two racks respectively.

[0014] Furthermore, the hook assembly is symmetrically arranged in several groups on the left and right sides of the bottom end of the longitudinal moving block. The hook assembly includes: a round tube, a first spring, a second spring, a third slider, a limiting ring, a rope, and a hook. The top end of the round tube is fixedly connected to the bottom end of the longitudinal moving block. The third slider is vertically slidably connected to the inner cavity of the round tube. The top end of the third slider is fixedly connected to one end of the first spring, and the other end of the first spring is fixedly connected to the bottom end of the longitudinal moving block. The bottom end of the round tube is coaxially fixedly connected to the limiting ring. The bottom end of the third slider is fixedly connected to one end of the second spring, and the other end of the second spring is fixedly connected to the top end of the limiting ring. One end of the rope movably passes through the central round hole of the limiting ring and is fixedly connected to the middle of the bottom end of the third slider. The other end of the rope is located below the limiting ring and is fixedly connected to the hook.

[0015] Furthermore, the horizontal adjustment component includes: lifting cylinders, rubber balls, and level rulers. Several lifting cylinders and rubber balls are provided. Several lifting cylinders are symmetrically fixedly installed on the left and right sides of the bottom end of the longitudinal moving block, and several rubber balls are respectively fixedly connected to the bottom telescopic ends of several lifting cylinders. Four level rulers are provided, and the four level rulers are respectively fixedly installed in the middle of the front, back, left, and right sides of the longitudinal moving block.

[0016] An installation method for prefabricated composite slabs, employing a rapid positioning device, specifically includes the following steps: Step 1: After the main structure of the building is completed and the conditions for installing prefabricated composite slabs are met, the installation area of ​​the prefabricated composite slabs is measured and marked out. Elevation control points are set at the supports of the prefabricated composite slabs. The prefabricated composite slabs are numbered, and their dimensions, the position of embedded parts, and the exposed length of the connecting steel bars are checked. Step 2: Use a tower crane to hoist the rapid positioning device to the installation area, and slowly lower it under the guidance of the rapid positioning device. Use the rapid positioning device to lift the prefabricated composite slab, so that the prefabricated composite slab is initially placed on the building support structure. Step 3: Adjust the level of the prefabricated composite slab using a quick positioning device. Fine-tune the front-back, left-right, and right-side positions of the prefabricated composite slab using the quick positioning device to ensure that the installation position of the prefabricated composite slab meets the design requirements. Step 4: After the prefabricated composite slab is accurately positioned, it is temporarily fixed to the building support structure to prevent displacement of the prefabricated composite slab during subsequent construction. Step 5: Weld the connecting steel bars between the prefabricated composite slabs and between the prefabricated composite slabs and the main building structure; Step Six: After the prefabricated composite slabs have passed the installation and acceptance inspection, cast-in-place concrete is poured to make the prefabricated composite slabs and the main building structure form an integral load-bearing structure.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention, through a rapid positioning device including a lateral movement component, a longitudinal movement component, and a horizontal adjustment component, can realize the synchronous adjustment of the lateral, longitudinal, and horizontal states of prefabricated composite slabs during the hoisting process, significantly improving the installation accuracy of prefabricated composite slabs.

[0018] 2. This invention uses a mechanized adjustment method to replace the traditional manual repeated correction operation, so that the prefabricated composite panel can be accurately positioned in one hoisting process, reducing the number of repeated hoisting and significantly shortening the installation time of a single prefabricated composite panel.

[0019] 3. This invention can reduce the amount of work that construction workers need to do by directly contacting and adjusting prefabricated composite panels at high altitudes, effectively reducing labor intensity and safety risks associated with working at heights.

[0020] 4. By setting a level on all four sides of the longitudinal moving block, the construction personnel can observe the horizontal status of the prefabricated composite slab in real time and make fine adjustments with the lifting cylinder and rubber ball, making the installation process more intuitive and controllable.

[0021] 5. The present invention has a reasonable structure and can be repeatedly hoisted and used by tower crane. It is suitable for the installation and construction of prefabricated composite slabs of different specifications and has good versatility and economy. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of a rapid positioning device for assembled composite plates provided by the present invention; Figure 2 This is a front view internal structure schematic diagram of a rapid positioning device for assembled composite plates provided by the present invention; Figure 3 This is a left-side internal structural schematic diagram of a rapid positioning device for assembled composite plates provided by the present invention; Figure 4 This is the present invention. Figure 2 Enlarged view of part A in the middle; Figure 5 This is the present invention. Figure 2 Enlarged view of part B in the middle section.

[0023] The labels in the attached diagram are as follows: 1-Positioning frame, 2-Steel cable, 3-Hanging ring, 4-Horizontal movement component, 5-Longitudinal movement component, 6-Horizontal adjustment component, 7-First T-shaped slide, 8-First T-shaped slider, 9-Support component, 10-Sleeve, 11-First motor, 12-Lead screw, 13-Horizontal movement block, 14-Second T-shaped slide, 15-Second T-shaped slider, 16-Longitudinal movement block, 17-Second motor, 18-Gear, 19-Rack, 20-Circular tube, 21-First spring, 22-Second spring, 23-Third slider, 24-Limiting ring, 25-Rope, 26-Hook, 27-Lifting cylinder, 28-Rubber ball, 29-Level. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] See Figures 1-5 As shown, a quick positioning device for prefabricated composite slabs includes: a positioning frame 1, a hanging assembly for connecting to a hook on a tower crane is provided at the top of the positioning frame 1, a lateral moving assembly 4 is provided at the bottom of the positioning frame 1, a longitudinal moving assembly 5 is provided at the bottom of the moving end of the lateral moving assembly 4, a hook assembly for hooking the prefabricated composite slab onto the bottom of the moving end of the longitudinal moving assembly 5, and a horizontal adjustment assembly 6 for adjusting the levelness of the prefabricated composite slab is also provided at the bottom of the moving end of the longitudinal moving assembly 5.

[0026] The suspension assembly includes: steel cables 2 and hanging rings 3. The positioning frame 1 includes: a horizontal rectangular plate and a vertical rectangular plate. There are two vertical rectangular plates, which are symmetrically fixed to the left and right sides of the bottom of the horizontal rectangular plate. There are several steel cables 2. One end of each steel cable 2 is evenly fixed to the top four sides of the horizontal rectangular plate, and the other end of each steel cable 2 is fixedly connected to the hanging rings 3. The hanging rings 3 cooperate with the hooks on the tower crane.

[0027] The lateral movement component 4 includes: a first T-shaped slider 8, a support member 9, a sleeve 10, and a lateral movement block 13. A first T-shaped groove 7 is horizontally arranged in the middle of the bottom end of the horizontal rectangular plate. There are two of each of the first T-shaped slider 8, support member 9, and sleeve 10. The two sleeves 10 are fixedly connected to the bottom ends of the two first T-shaped sliders 8 through the two support members 9 respectively. The two first T-shaped sliders 8 are laterally slidably connected in the first T-shaped groove 7. The sleeves 10 are located below the horizontal rectangular plate. The lateral movement block 13 is rectangular. The bottom ends of the two sleeves 10 are symmetrically fixedly connected to the left and right sides of the top end of the lateral movement block 13. The bottom end of the positioning frame 1 is provided with a lateral drive component for driving the lateral movement block 13 to move laterally.

[0028] The lateral drive assembly includes a first motor 11 and a lead screw 12. The lead screw 12 passes through and is threadedly connected to two sleeves 10 respectively. One end of the lead screw 12 is rotatably connected to the vertical rectangular plate on the left side. The first motor 11 is fixedly installed on the outer end of the vertical rectangular plate on the right side. The output shaft of the first motor 11 passes through and is rotatably connected to the vertical rectangular plate on the right side and is coaxially fixedly connected to the other end of the lead screw 12.

[0029] The first motor 11 drives the lead screw 12 to rotate forward or reverse, which in turn drives the lateral moving block 13 at its bottom end to move laterally through the sleeve 10.

[0030] The longitudinal moving component 5 includes: a second T-shaped slider 15 and a longitudinal moving block 16. Two longitudinally arranged second T-shaped grooves 14 are symmetrically opened on the left and right sides of the bottom end of the transverse moving block 13. Two second T-shaped sliders 15 are provided. The longitudinal moving block 16 is rectangular. The two second T-shaped sliders 15 are symmetrically fixedly connected to the left and right sides of the top end of the longitudinal moving block 16. The two second T-shaped sliders 15 are respectively longitudinally slidably connected in the two second T-shaped grooves 14. A longitudinal driving component for driving the longitudinal moving block 16 to move longitudinally is provided between the transverse moving block 13 and the longitudinal moving block 16.

[0031] The longitudinal drive assembly includes a second motor 17, a gear 18, and a rack 19. Two second motors 17, gears 18, and racks 19 are symmetrically arranged on the left and right sides. Two racks 19 are symmetrically fixedly connected to the top left and right sides of the longitudinal moving block 16. Two second motors 17 are symmetrically fixedly installed on the left and right sides of the transverse moving block 13. Two gears 18 are fixedly installed on the output shafts of the two second motors 17 respectively, and the two gears 18 mesh with the two racks 19 respectively.

[0032] By synchronously driving two second motors 17 to rotate forward or in reverse, two gears 18 are driven to rotate, which in turn drives the rack 19, i.e., the longitudinal moving block 16 at its lower end, to move longitudinally.

[0033] Several sets of hook assemblies are symmetrically arranged on the left and right sides of the bottom end of the longitudinal moving block 16. The hook assembly includes: a round tube 20, a first spring 21, a second spring 22, a third slider 23, a limiting ring 24, a rope 25, and a hook 26. The top end of the round tube 20 is fixedly connected to the bottom end of the longitudinal moving block 16. The third slider 23 is vertically slidably connected to the inner cavity of the round tube 20. The top end of the third slider 23 is fixedly connected to one end of the first spring 21, and the other end of the first spring 21 is fixedly connected to the bottom end of the longitudinal moving block 16. The bottom end of the round tube 20 is coaxially fixedly connected to the limiting ring 24. The bottom end of the third slider 23 is fixedly connected to one end of the second spring 22, and the other end of the second spring 22 is fixedly connected to the top end of the limiting ring 24. One end of the rope 25 moves through the middle round hole of the limiting ring 24 and is fixedly connected to the middle of the bottom end of the third slider 23. The other end of the rope 25 is located below the limiting ring 24 and is fixedly connected to the hook 26. The hook 26 is used to hook the steel bar supports on both sides of the composite plate.

[0034] The horizontal adjustment component 6 includes: lifting cylinders 27, rubber balls 28, and level 29. Several lifting cylinders 27 and rubber balls 28 are provided. Several lifting cylinders 27 are symmetrically fixedly installed on the left and right sides of the bottom of the longitudinal moving block 16. Several rubber balls 28 are respectively fixedly connected to the bottom telescopic ends of several lifting cylinders 27. Four level 29 are provided. The four level 29 are respectively fixedly installed in the middle of the front, back, left, and right sides of the longitudinal moving block 16.

[0035] In practical use, firstly, the hanging ring 3 is attached to the existing tower crane hook. Then, the positioning frame 1 is moved as a whole to the stacking location of the prefabricated composite slabs by the tower crane. Next, the hooks 26 are symmetrically attached to the steel reinforcement supports on both sides of the prefabricated composite slabs. The prefabricated composite slabs are then hoisted above the installation area. By observing the level 29, the lifting cylinder 27 is activated. The rubber ball 28 presses against the top of the prefabricated composite slab, thereby adjusting the levelness of the prefabricated composite slabs. The output end of the first motor 11 rotates, driving the lead screw 12 to rotate. The rotation of the lead screw 12 drives the sleeve 10. The movement of the sleeve 10 causes the lateral moving block 13 to move, which in turn causes the longitudinal moving block 16 to move. The longitudinal moving block 16 then causes the assembled composite plate to move, thereby adjusting the lateral position of the assembled composite plate. The output end of the second motor 17 rotates, causing the gear 18 to rotate. The gear 18 then rotates, causing the rack 19 to move. The rack 19 then moves, causing the longitudinal moving block 16 to move. The longitudinal moving block 16 then moves the assembled composite plate, thereby adjusting the front and rear position of the assembled composite plate, facilitating its rapid placement and improving laying efficiency.

[0036] An installation method for prefabricated composite slabs, specifically including the following steps: Step 1: After the main structure of the building is completed and the conditions for installing prefabricated composite slabs are met, the installation area of ​​the prefabricated composite slabs is measured and marked out. Elevation control points are set at the supports of the prefabricated composite slabs. The prefabricated composite slabs are numbered, and their dimensions, the position of embedded parts, and the exposed length of the connecting steel bars are checked. Step 2: Use a tower crane to hoist the rapid positioning device to the installation area, and slowly lower it under the guidance of the rapid positioning device. Use the rapid positioning device to lift the prefabricated composite slab, so that the prefabricated composite slab is initially placed on the building support structure. Step 3: Adjust the level of the prefabricated composite slab using a quick positioning device. Fine-tune the front-back, left-right, and right-side positions of the prefabricated composite slab using the quick positioning device to ensure that the installation position of the prefabricated composite slab meets the design requirements. Step 4: After the prefabricated composite slab is accurately positioned, it is temporarily fixed to the building support structure to prevent displacement of the prefabricated composite slab during subsequent construction. Step 5: Weld the connecting steel bars between the prefabricated composite slabs and between the prefabricated composite slabs and the main building structure, and treat the reserved holes; Step Six: After the prefabricated composite slabs have passed the installation and acceptance inspection, cast-in-place concrete is poured to make the prefabricated composite slabs and the main building structure form an integral load-bearing structure.

[0037] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the technical solution of the present invention, based on the technical essence of the present invention, shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A rapid positioning device for prefabricated composite slabs, characterized in that, include: The positioning frame (1) has a hanging assembly at its top for connecting with the hook on the tower crane, a lateral moving assembly (4) at its bottom, a longitudinal moving assembly (5) at the bottom of the moving end of the lateral moving assembly (4), a hook assembly for attaching the prefabricated composite plate to the moving end of the longitudinal moving assembly (5), and a horizontal adjustment assembly (6) for adjusting the levelness of the prefabricated composite plate at the bottom of the moving end of the longitudinal moving assembly (5).

2. The rapid positioning device for assembled composite slabs according to claim 1, characterized in that: The suspension assembly includes: steel cable (2) and hanging ring (3). The positioning frame (1) includes: a horizontal rectangular plate and a vertical rectangular plate. There are two vertical rectangular plates, which are symmetrically fixedly connected to the bottom left and right sides of the horizontal rectangular plate. There are several steel cables (2). One end of several steel cables (2) is evenly fixedly connected to the top four sides of the horizontal rectangular plate. The other end of several steel cables (2) is fixedly connected to the hanging ring (3). The hanging ring (3) cooperates with the hook on the tower crane.

3. The rapid positioning device for assembled composite slabs according to claim 2, characterized in that: The lateral movement component (4) includes: a first T-shaped slider (8), a support (9), a sleeve (10), and a lateral movement block (13). The bottom center of the horizontal rectangular plate is provided with a first T-shaped groove (7) arranged laterally. There are two of each of the first T-shaped slider (8), support (9), and sleeve (10). The two sleeves (10) are fixedly connected to the bottom of the two first T-shaped sliders (8) by the two support (9). The two first T-shaped sliders (8) are laterally slidably connected in the first T-shaped groove (7). The sleeve (10) is located below the horizontal rectangular plate. The lateral movement block (13) is rectangular. The bottom ends of the two sleeves (10) are symmetrically fixedly connected to the top left and right sides of the lateral movement block (13). The bottom end of the positioning frame (1) is provided with a lateral drive component for driving the lateral movement block (13) to move laterally.

4. The rapid positioning device for assembled composite slabs according to claim 3, characterized in that: The lateral drive assembly includes a first motor (11) and a lead screw (12). The lead screw (12) passes through and is threadedly connected to two sleeves (10). One end of the lead screw (12) is rotatably connected to the vertical rectangular plate on the left side. The first motor (11) is fixedly installed on the outer end of the vertical rectangular plate on the right side. The output shaft of the first motor (11) passes through and is rotatably connected to the vertical rectangular plate on the right side and is coaxially fixedly connected to the other end of the lead screw (12).

5. The rapid positioning device for assembled composite slabs according to claim 3, characterized in that: The longitudinal moving component (5) includes: a second T-shaped slider (15) and a longitudinal moving block (16). The bottom left and right sides of the transverse moving block (13) are symmetrically provided with two longitudinally arranged second T-shaped grooves (14). There are two second T-shaped sliders (15). The longitudinal moving block (16) is rectangular. The two second T-shaped sliders (15) are symmetrically fixedly connected to the top left and right sides of the longitudinal moving block (16). The two second T-shaped sliders (15) are respectively longitudinally slidably connected in the two second T-shaped grooves (14). A longitudinal driving component is provided between the transverse moving block (13) and the longitudinal moving block (16) to drive the longitudinal moving block (16) to move longitudinally.

6. The rapid positioning device for prefabricated composite slabs according to claim 5, characterized in that: The longitudinal drive assembly includes a second motor (17), a gear (18), and a rack (19). The second motor (17), gear (18), and rack (19) are symmetrically arranged in two positions on the left and right. The two racks (19) are symmetrically fixedly connected to the top left and right sides of the longitudinal moving block (16). The two second motors (17) are symmetrically fixedly installed on the left and right sides of the transverse moving block (13). The output shafts of the two second motors (17) are respectively fixedly installed with two gears (18), and the two gears (18) mesh with the two racks (19) respectively.

7. The rapid positioning device for assembled composite slabs according to claim 5, characterized in that: The hook assembly is symmetrically arranged in several groups on the left and right sides of the bottom end of the longitudinal moving block (16). The hook assembly includes: a round tube (20), a first spring (21), a second spring (22), a third slider (23), a limiting ring (24), a rope (25), and a hook (26). The top end of the round tube (20) is fixedly connected to the bottom end of the longitudinal moving block (16). The third slider (23) is vertically slidably connected to the inner cavity of the round tube (20). The top end of the third slider (23) is fixedly connected to one end of the first spring (21). 1) The other end is fixedly connected to the bottom end of the longitudinal moving block (16). The bottom end of the round tube (20) is coaxially fixedly connected to the limiting ring (24). The bottom end of the third slider (23) is fixedly connected to one end of the second spring (22). The other end of the second spring (22) is fixedly connected to the top end of the limiting ring (24). One end of the rope (25) moves through the middle round hole of the limiting ring (24) and is fixedly connected to the middle of the bottom end of the third slider (23). The other end of the rope (25) is located below the limiting ring (24) and is fixedly connected to the hook (26).

8. The rapid positioning device for assembled composite slabs according to claim 7, characterized in that: The horizontal adjustment component (6) includes: a lifting cylinder (27), a rubber ball (28), and a level (29). Several lifting cylinders (27) and rubber balls (28) are provided. Several lifting cylinders (27) are symmetrically fixedly installed on the left and right sides of the bottom of the longitudinal moving block (16). Several rubber balls (28) are respectively fixedly connected to the bottom extension ends of several lifting cylinders (27). Four level (29) are provided. The four level (29) are respectively fixedly installed in the middle of the front, back, left and right sides of the longitudinal moving block (16).

9. A method for installing prefabricated composite slabs, using the rapid positioning device described in any one of claims 1 to 8, characterized in that: Specifically, the following steps are included: Step 1: After the main structure of the building is completed and the conditions for installing prefabricated composite slabs are met, the installation area of ​​the prefabricated composite slabs is measured and marked out. Elevation control points are set at the supports of the prefabricated composite slabs. The prefabricated composite slabs are numbered, and their dimensions, the position of embedded parts, and the exposed length of the connecting steel bars are checked. Step 2: Use a tower crane to hoist the rapid positioning device to the installation area, and slowly lower it under the guidance of the rapid positioning device. Use the rapid positioning device to lift the prefabricated composite slab, so that the prefabricated composite slab is initially placed on the building support structure. Step 3: Adjust the level of the prefabricated composite slab using a quick positioning device. Fine-tune the front-back, left-right, and right-side positions of the prefabricated composite slab using the quick positioning device to ensure that the installation position of the prefabricated composite slab meets the design requirements. Step 4: After the prefabricated composite slab is accurately positioned, it is temporarily fixed to the building support structure to prevent displacement of the prefabricated composite slab during subsequent construction. Step 5: Weld the connecting steel bars between the prefabricated composite slabs and between the prefabricated composite slabs and the main building structure; Step Six: After the prefabricated composite slabs have passed the installation and acceptance inspection, cast-in-place concrete is poured to make the prefabricated composite slabs and the main building structure form an integral load-bearing structure.

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