Prefabricated laminated slab construction hoisting system

Abstract

The present application relates to the technical field of hoisting technology of laminated slab construction, in particular to a kind of assembled laminated slab construction hoisting system, including laminated slab, mould table, tower crane, keel and control system, wherein: the mould table is used to install the laminated slab, the tower crane is used to hoist laminated slab to mould table, the laminated slab is provided with keel, the laminated slab is provided with positioning device, and the positioning device is used to quickly position laminated slab to installation position and flush with mould table.This application makes laminated slab flush with mould table sidewall quickly through positioning device, quickly reaches the set installation position, and the positioning precision is higher relative to traditional manual naked eye positioning, the specified distance between laminated slab sidewall and mould table sidewall does not need to be rechecked, reduces the workload of worker detection, ensures that the positioning block surface and mould table side surface are attached to ensure positioning precision, reduces manual error, makes error visual, improves hoisting efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the construction hoisting technology field of laminated slab, in particular to a kind of assembly type laminated slab construction hoisting system. BACKGROUND

[0002] Traditional construction process is cast-in-place reinforced concrete, through formwork erection, steel bar laying, concrete pouring is completed, because all adopts pouring method, needs to use a large amount of formwork and concrete, consumes too much material, simultaneously, serious environmental pollution, therefore, laminated slab is put forward at present stage, it is made of environmental protection material, and after using laminated slab, the use of formwork can be reduced, laminated slab is used as part of the bottom plate for pouring, and because steel bars are also arranged in laminated slab, laminated slab can replace a part of concrete as construction material, that is, formwork material is reduced, and the amount of concrete is also reduced.

[0003] Laminated slab is batch-produced according to specifications in a factory, then transported to the construction site by truck for hoisting, the tower crane hook is hooked on the laminated slab keel by manual, the laminated slab is transported to the floor to be installed by the tower crane, the floor has installed formwork, the part where laminated slab needs to be installed is hollowed out, and no formwork is installed, only the formwork table capable of placing laminated slab is erected, after the laminated slab is transported to the floor by the tower crane, positioning is carried out by manual naked eye, and the laminated slab is slowly lowered on the formwork table by cooperating with the tower crane, even in the case of manual assistance, the work is still unstable when the tower crane is working, so that the laminated slab deviates from the formwork table more, manual adjustment needs to be carried out by using a crowbar, and the construction hoisting process is completed, in the process of hoisting laminated slab, part of the volume of laminated slab needs to be reserved outside the formwork table, for enabling laminated slab to contact and mix with cast-in-place concrete, when installing laminated slab, workers cannot quickly make laminated slab flush with the formwork table, and the part of laminated slab extending out of the formwork table does not meet the specifications, too little will cause insufficient mixing place of laminated slab and concrete, and laminated slab is prone to fall off, therefore, in the process of hoisting laminated slab, the part of laminated slab extending out of the formwork table needs to be ensured to be in the set range, otherwise, hoisting needs to be re-measured or manual adjustment needs to be carried out on the position of laminated slab for multiple times, which not only increases the workload of workers, but also has the risk of laminated slab falling off when hoisting laminated slab is re-measured, and safety accidents are prone to occur.

[0004] Therefore, in order to enable laminated slab to be quickly flush, ensure that the extending part is in the set range, reduce the workload of workers, and improve hoisting efficiency, a kind of assembly type laminated slab construction hoisting system is provided. SUMMARY

[0005] The purpose of the present application is to provide a prefabricated laminated slab construction hoisting system, which can quickly align the laminated slab with the side wall of the mold platform through the positioning device, quickly reach the set installation position, ensure the positioning accuracy by ensuring that the side of the positioning block is attached to the side of the mold platform, reduce the manual error, make the error visual, reduce the hoisting rework workload, and improve the hoisting work efficiency, so as to solve the problems in the above background art.

[0006] To achieve the above purpose, the present application provides the following technical solutions:

[0007] A prefabricated laminated slab construction hoisting system, comprising a laminated slab, a mold platform, a tower crane, a keel, and a control system, wherein:

[0008] The laminated slab is provided with a keel, and the tower crane hoists the laminated slab onto the mold platform through the keel;

[0009] A positioning device is arranged on the laminated slab, which is used to quickly position the laminated slab to the installation position and align it with the mold platform, so that the worker only needs to attach the positioning block of the positioning device to the side wall of the mold platform during the hoisting process of the laminated slab, and the laminated slab can be positioned at the hoisting installation position, while the accuracy of the distance between the specified side wall of the laminated slab and the side wall of the mold platform is ensured, and the hoisting work efficiency is improved.

[0010] Preferably, the positioning device comprises a mounting frame provided with a positioning block at the bottom, a support rod threadedly connected in the mounting frame, a clamping plate slidingly installed on the support rod, a spring one connected between the clamping plate and the mounting frame outside the support rod, side positioning plates arranged on the clamping plate and the mounting frame, and a locking assembly provided at the top of the mounting frame for locking and fixing the position of the clamping plate. Through the cooperation of the clamping plate and the mounting frame, the positioning block can be stably installed at the bottom of the laminated slab, the spring one provides clamping force to make the clamping plate and the mounting frame more attached to the laminated slab, the locking assembly locks the clamping plate to prevent it from being offset by impact during positioning, ensuring the stability of clamping, and the attachment of the side wall of the positioning block to the side wall of the mold platform ensures the specified distance between the side wall of the laminated slab and the side wall of the mold platform. The tower crane hoists the laminated slab onto the mold platform, the worker manually pushes the laminated slab to make the side wall of the positioning block attached to the side wall of the mold platform, and the laminated slab is horizontally moved to accurately position it at the hoisting position, reducing the subsequent manual adjustment workload and improving the hoisting efficiency.

[0011] Preferably, the locking assembly comprises a cam, which is rotatably installed on the top of the mounting frame through a positioning pin, and an operating rod is threadedly connected to the cam; the cam is used instead of the spring to lock; the spring will lose elasticity after long-term use, resulting in insufficient elastic force, insufficient clamping force, and the positioning block cannot be stably installed on the laminated slab; during the positioning of the laminated slab, impact force will be generated between the positioning block and the mold table; if the clamping force is insufficient, the positioning block will be knocked off the laminated slab, and manual reinstallation is required; at the same time, the positioning process provides the laminated slab with a fitting force for the positioning block by manual operation, so as to achieve accurate positioning; the cam is used for clamping; the cam is an insertion block, which can change the distance between the clamping plate and the mounting frame according to the thickness of the cam, so as to achieve the clamping effect; although the cam will also be worn after long-term use, the wear part can be compensated by increasing the insertion depth and increasing the thickness, so that the service life of the cam is longer, the clamping force of the clamping plate and the mounting frame on the laminated slab is ensured, and the stability of clamping is improved; the locking assembly of the scheme can also use a sliding block to compensate for clamping; the contact friction force of the sliding block compensation clamping mode is larger, so that the force that can be resisted is larger and the stability is stronger; however, due to the large friction force, a larger acting force is also required to operate during installation and removal; the design of the scheme only needs to change the angle of the cam to change the clamping force; the rotating force for operating the cam is smaller than the horizontal force for pushing the sliding block; the installation and removal work is simpler and faster, and the hoisting work efficiency is improved.

[0012] Preferably, a ratchet wheel is threadedly connected to the cam, a pawl is arranged beside the ratchet wheel on the top of the mounting frame, the pawl and the ratchet wheel are matched with each other, and a reset assembly for unlocking the pawl and the ratchet wheel and finely adjusting the contact position of the pawl and the ratchet wheel is arranged at the pawl; the ratchet wheel mechanism can prevent the cam from rotating during use; during clamping, the worker manually provides clamping power for the cam; after clamping, the cam will also be subjected to the reaction force of clamping, so that the forces on both sides of the cam are balanced; if the manual power is removed at this time, the cam will rebound under the reaction force of clamping until the reaction force of clamping disappears, the cam balances, and the clamping force also disappears, so that the clamping effect cannot be achieved; the ratchet wheel and the pawl can provide fixing force for the cam to offset the reaction force of clamping; the worker can also continuously try the maximum clamping force through the ratchet wheel and pawl mechanism, fix the maximum clamping force through the ratchet wheel and pawl, ensure the maximum clamping force, and achieve the best clamping stability.

[0013] Preferably, the reset assembly comprises a fine adjustment block, the fine adjustment block is movably mounted on the top of the mounting frame through positioning pins, the fine adjustment block is connected with the mounting frame through a spring II, the pawl is rotatably mounted on the fine adjustment block through positioning pins, the fine adjustment block movably mounts a fine adjustment nut I on the top, and the fine adjustment block is provided with a release rod for releasing the locking of the ratchet and pawl. Since the ratchet is matched with the pawl through the teeth on the wheel, the maximum clamping force is not necessarily located at the contact position of the ratchet teeth and the pawl, but can be located between the two ratchet teeth. At this time, the locking effect of the ratchet and pawl mechanism cannot be achieved, and a small range of return occurs, which reduces the clamping force and reduces the clamping stability. Therefore, the height of the pawl can be adjusted by rotating the fine adjustment nut I in cooperation with the elasticity of the spring II, so that the pawl contacts the ratchet teeth, the locking position of the ratchet mechanism is changed, and the stability of clamping is ensured.

[0014] Preferably, a plurality of laser emitters are threadedly connected on the mounting frame, and light transmission holes matched with the laser emitters are formed in the clamping plate. When the side wall of the laminated slab is a blank surface, the worker extrudes the mounting frame towards the side wall of the laminated slab, and the laser passes through the light transmission hole and directly reaches the clamping plate of the mounting frame if there is no obstruction in the middle. In this way, the worker is prompted that the clamping plate and the mounting frame are not attached to the side wall of the laminated slab, and at this time the positioning accuracy is not accurate and needs to be reattached so that the laminated slab blocks the laser from reaching the mounting frame, proving that the side wall of the laminated slab has been attached to the clamping plate and the mounting frame, and positioning work can be carried out to ensure the accuracy of positioning. When the side wall of the laminated slab is a smooth surface, the material can be directly compensated slightly to carry out the positioning work.

[0015] Preferably, the clamping plate is provided with a tooth-shaped protrusion. Since the laminated slab is a factory prefabricated slab, it can only replace part of the mold base during assembly. Compared with the formwork, the laminated slab does not need to be removed after pouring concrete like the formwork, and can be used as part of the building together with the concrete. Therefore, only the bottom surface that does not contact the concrete needs to be processed when the laminated slab is made, and the top surface and the four side surfaces of the laminated slab are all blank surfaces. Most of the blank surfaces are uneven, resulting in a small contact area and small friction between the clamping plate and the laminated slab when the clamping and positioning block is clamped. When the positioning block is positioned and subjected to a horizontal impact force, the impact force is transmitted to the clamping plate. When the impact force is greater than the friction force, the clamping plate will be separated from the laminated slab, the positioning block will be separated, and effective positioning cannot be carried out. After the tooth-shaped protrusion is added, the teeth will be clamped in the recesses or protrusions of the blank surface of the laminated slab, increasing the horizontal resistance of the clamping plate and improving the stability of the clamping plate.

[0016] Preferably, the mounting frame and the clamping plate are provided with rubber pads for compensating the slight unevenness of the contact surface, the positioning block changes with the position of the clamping plate and the laminated board, if the clamping plate cannot be parallel to the top surface of the laminated board, the positioning block deviates from the side surface of the mold table, and the positioning changes from the side surface to the edge line, so that the positioning accuracy is reduced, and the rubber pads are arranged to compensate the slight unevenness, so that the clamping plate is basically parallel to the top surface of the laminated board, and the positioning accuracy is ensured.

[0017] Preferably, the positioning block is provided with a fine adjustment screw, the fine adjustment screw is threadedly connected to the mounting frame, and the fine adjustment screw is provided with a second fine adjustment nut, the mounting frame is provided with a scale for accurate measurement, the distance between the side wall of the laminated board and the side wall of the mold table is one centimeter, and the distance is increased for larger laminated boards to increase the contact area of the laminated board and the concrete, so that the laminated board does not fall off due to the gravity greater than the adhesion after being combined with the concrete, and a safety accident is caused, and the distance is strictly ensured within the specified range during hoisting of the laminated board, the positioning block is adjusted through the fine adjustment screw and the fine adjustment nut, the distance between the side wall of the laminated board and the side wall of the mold table is set after positioning, the positioning distance is directly displayed through the scale, the positioning accuracy is improved, the workload of manual measurement and inspection is reduced, and the work efficiency is improved.

[0018] Preferably, the supporting rod is provided in a hollow shape, the connecting rod is movably arranged in the supporting rod, the supporting rod is sleeved on the connecting rod, the mounting frame is rotatably arranged on the lever through the positioning pin at the bottom, the mounting frame is threadedly connected to the suction disc at the bottom, the piston is movably arranged in the suction disc, the piston and the connecting rod are rotatably arranged on the two sides of the lever through the positioning pin, respectively, and the piston bottom is connected to the mounting frame through the spring three. The connecting rod top is provided with a cam matching protrusion. Since the laminated board ground is a processed surface, the bottom surface is smoother than the top surface and the side surface, and can be used as a reference surface of the clamping plate. Since the bottom surface is smoother than the top surface, the tooth shape cannot be used to increase the friction force. In the scheme, the suction disc is used to increase the friction force, the suction disc uses the piston type air suction negative pressure mode to make the mounting frame surface more fit the laminated board, and the suction disc power and the clamping plate downward clamping of the laminated board are the same power, so that the friction force is increased during clamping, errors generated during manual operation are prevented, the positioning position is prevented from deviating, and effective positioning is realized. The design improves the stability of clamping, effectively reduces the manual operation error, and improves the positioning accuracy.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] 1. The prefabricated laminated slab construction hoisting system, through the positioning device, the laminated slab can be quickly flush with the side wall of the mold table, quickly reach the set installation position, compared with the traditional manual naked eye positioning, the positioning precision is higher, the distance between the side wall of the laminated slab and the side wall of the mold table is not required to be rechecked, the workload of the workers is reduced, the positioning block surface and the mold table side surface are guaranteed to be attached, the positioning precision is guaranteed, the manual error is reduced, the error is visualized, and the hoisting work efficiency is improved.

[0021] 2. The prefabricated laminated slab construction hoisting system, through the cam and the ratchet mechanism of the positioning device, when the positioning block is installed and clamped manually, the maximum clamping force can be guaranteed, the positioning block is prevented from being impacted during the positioning process and being transmitted to the clamping part, the clamping part cannot bear the positioning block, the positioning block is separated from the laminated slab, and reinstallation is required to position, the stability of the clamping part is improved, and the positioning reliability is guaranteed.

[0022] 3. The prefabricated laminated slab construction hoisting system, through the fine adjustment screw and the fine adjustment nut part of the positioning device, the positioning device can be adapted to more specifications of laminated slab, the distance between the side wall of the laminated slab and the side wall of the mold table can be adjusted according to the regulation, and for the part of the laminated slab side wall that is too large, the distance can be compensated by fine adjustment, so that the positioning precision is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0024] Figure 2 It is a schematic diagram of the overall structure of the positioning device of the present application;

[0025] Figure 3 It is an elevation view of the positioning device of the present application;

[0026] Figure 4 It is a sectional view of the elevation view of the positioning device of the present application;

[0027] Figure 5 It is an enlarged view of A in the present application; Figure 4

[0028] Figure 6 It is a sectional view of the positioning device of the present application;

[0029] Figure 7 It is a schematic diagram of the clamping plate structure of the present application;

[0030] Figure 8 It is a bottom view of the clamping plate of the present application;

[0031] Figure 9 It is a schematic diagram of the overall structure of the positioning device of the second embodiment of the present application.

[0032] ​In the diagram: 1. Composite plate; 2. Mold table; 3. Tower crane; 4. Keel; 5. Mounting frame; 6. Positioning block; 7. Support rod; 8. Clamping plate; 9. Spring 1; 10. Cam; 11. Operating lever; 12. Ratchet; 13. Pad; 14. Fine-tuning block; 15. Spring 2; 16. Fine-tuning nut 1; 17. Laser emitter; 18. Light-transmitting hole; 19. Rubber pad; 20. Fine-tuning screw; 21. Fine-tuning nut 2; 22. Scale; 23. Connecting rod; 24. Lever; 25. Suction cup; 26. Piston; 27. Protrusion; 28. Spring 3; 29. ​​Release lever; 30. Side positioning plate. Detailed Implementation

[0033] Example 1, as Figures 1 to 9 As shown, this embodiment is applicable to working environments where the side surface of the composite plate 1 is a rough surface, specifically as follows:

[0034] A prefabricated composite slab construction hoisting system includes: composite slab 1, formwork 2, tower crane 3, keel 4 and control system, wherein: the composite slab 1 is provided with keel 4, and the tower crane 3 hoists the composite slab 1 onto the formwork 2 through the keel 4;

[0035] The positioning device includes a mounting frame 5, a positioning block 6 is movably mounted at the bottom of the mounting frame 5, a support rod 7 is installed inside the mounting frame 5, a clamping plate 8 is movably mounted on the support rod 7, a spring 9 is sleeved outside the support rod 7 and between the clamping plate 8 and the mounting frame 5, a side positioning plate 30 is provided on both the clamping plate 8 and the mounting frame 5, and a locking component is provided at the top of the mounting frame 5 for locking and fixing the position of the clamping plate 8.

[0036] A cam 10 is rotatably mounted on the top of the mounting frame 5. An operating lever 11 is mounted on the cam 10. A ratchet 12 is provided on the cam 10. A pawl 13 is provided on the top of the mounting frame 5. The pawl 13 and the ratchet 12 cooperate with each other. A reset component is provided at the pawl 13 for releasing the pawl 13 from the ratchet 12 lock and for fine-tuning the contact position of the pawl 13 and the ratchet 12.

[0037] The reset assembly includes a fine-tuning block 14, which is movably mounted on the top of the mounting frame 5. The fine-tuning block 14 is connected to the mounting frame 5 by a spring 15. A pawl 13 is rotatably mounted on the fine-tuning block 14. A fine-tuning nut 16 is mounted on the top of the fine-tuning block 14. A release lever 29 is provided on the fine-tuning block 14.

[0038] Multiple laser emitters 17 are mounted on the mounting frame 5. A light-transmitting hole 18 of the same size as the laser is opened on the clamping plate 8, and the light-transmitting hole 18 cooperates with the laser emitter 17.

[0039] The clamping plate 8 is provided with a tooth-shaped protrusion, the mounting frame 5 and the clamping plate 8 are in contact with the top surface and the side surface portion of the laminated board 1, and are provided with rubber pads 19, the positioning block 6 is provided with a fine adjustment screw 20, the fine adjustment screw 20 is threadedly connected to the mounting frame 5, the fine adjustment screw 20 is provided with a fine adjustment nut 21, the mounting frame 5 is provided with a scale 22 on the side wall of the base, and the side surface of the positioning block 6 close to the fine adjustment nut 21 is a positioning surface;

[0040] The support rod 7 is provided in a hollow shape, the support rod 7 is movably provided with a connecting rod 23 inside, the mounting frame 5 is rotatably provided with a lever 24 at the bottom, the mounting frame 5 is provided with a suction cup 25 at the bottom, the suction cup 25 is movably provided with a piston 26 at the center, the piston 26 and the connecting rod 23 are rotatably provided on the two sides of the lever 24 respectively, the piston 26 is connected to the mounting frame 5 through a spring 28 at the bottom, the connecting rod 23 is provided with a protruding block 27 at the top, and the protruding block 27 cooperates with the cam 10;

[0041] Before positioning, the spring 9 is in a normal elongation, the top surface of the clamping plate 8 is in contact with the cam 10, the spring 28 is in a normal elongation, the piston 26 is lifted, the lever 24 is inclined to the side of the connecting rod 23, the protruding block 27 at the top of the connecting rod 23 is in contact with the cam 10, a worker adjusts the fine adjustment nut 21 according to the size of the laminated board 1, so that the positioning surface is located at the 0 scale line on the scale 22, and the distance between the side wall of the laminated board 1 and the positioning surface is 1 cm, which meets the specified range, the positioning block 6 is installed on the laminated board 1, the worker sets the suction cup 25 of the mounting frame 5 against the bottom surface of the laminated board 1, the clamping plate 8 is located on the top surface of the laminated board 1, the side positioning plate 30 is in contact with the side wall of the laminated board 1, the laser emitter 17 is turned on, and whether there is a laser point on the mounting frame 5 is observed, if there is, it proves that the side positioning plate 30 is not in contact with the side wall of the laminated board 1, and manual pressing needs to be continued until there is no laser point on the mounting frame 5, at this time, the operating rod 11 is pushed forward, the cam 10 rotates, drives the ratchet wheel 12 to rotate, and simultaneously presses the clamping plate 8 to move downward, when the clamping plate 8 is in contact with the top surface of the laminated board 1, the fine adjustment nut 16 is adjusted, so that the fine adjustment block 14 moves up and down, and then drives the pawl 13 to move up and down, the pawl 13 abuts against the teeth of the ratchet wheel 12, and the ratchet wheel 12 cannot rotate back, when the operating rod 11 is pushed forward, the cam 10 rotates and simultaneously presses the protruding block 27 to move upward, drives the connecting rod 23 to move upward, and then drives the lever 24 to move, and inclines to the side of the piston 26, the piston 26 presses the spring 28, since the suction cup 25 is in contact with the bottom of the laminated board 1, the volume of the inside of the piston 26 is increased, but the volume of the gas is unchanged, so that the inside of the suction cup 25 has a negative pressure, the suction cup 25 drives the mounting frame 5 to be pressed and contacted with the bottom surface of the laminated board 1 by the atmospheric pressure, and the installation work is completed.

[0042] The positioning work is started, the tower crane 3 lifts the laminated slab 1 through the keel 4 to the laminated slab 1 installation floor and is located above the mold table 2, workers slowly lower the laminated slab 1 according to the position of the positioning block 6, after reaching a certain height, workers move the laminated slab 1 horizontally according to the positioning block 6 and the tower crane 3, until the positioning surface of the positioning block 6 is parallel and fits the side wall of the mold table 2, workers slowly lower the laminated slab 1 to the surface of the mold table 2 with the tower crane 3, the positioning work and hoisting work are completed, the tower crane 3 continues to hoist the next laminated slab 1, workers need to disassemble the positioning device, only need to pull the release rod 29, so that the pawl 13 is away from the teeth of the ratchet wheel 12, the ratchet wheel 12 is released, the operating rod 11 is pulled back, driving the cam 10 to rotate, the clamping plate 8 loses the extrusion of the cam 10, the spring one 9 rebounds, driving the clamping plate 8 to move upwards, away from the top surface of the laminated slab 1, the protrusion 27 loses the lifting force of the cam 10, so that the spring three 28 is not extruded, starts to rebound, driving the piston 26 to move upwards, driving the lever 24 to move upwards, making the lever 24 tilt towards the connecting rod 23, the connecting rod 23 descends, the volume of the suction cup 25 inside is reduced, the air pressure is restored, the installation frame 5 is not extruded by the atmospheric pressure to the bottom surface of the laminated slab 1, workers can easily take out the positioning device, and start to install and position the next laminated slab 1.

[0043] In example two, as shown in the figure, in this example, it is suitable for working environment where the side surface of the laminated slab 1 is smooth, and the specific steps are as follows: Figures 1 to 9

[0044] In this example, during the process of workers installing the positioning device on the laminated slab 1, first, adjust the fine adjustment nut two 21, so that the distance between the side wall of the laminated slab 1 and the positioning surface is within the specified range, then stick the installation frame 5 with the suction cup 25 to the bottom surface of the laminated slab 1, push the side positioning plate 30 to fit the side surface of the laminated slab 1, manually pull the operating rod 11, the cam 10 rotates, making the clamping plate 8 move downwards and clamp the laminated slab 1 with the installation frame 5, at the same time, the connecting rod 23 is lifted by the cam 10 through the protrusion 27, driving the piston 26 to move downwards through the lever 24, making the suction cup 25 inside have negative pressure and tightly stick to the bottom surface of the laminated slab 1, the positioning device is installed, the subsequent positioning and disassembly work is the same as example one, according to the parallel fitting of the positioning surface and the mold table 2, ensure that the laminated slab 1 is accurately installed on the mold table 2, workers rotate the release rod 29 and pull the operating rod 11, so that the positioning device can be disassembled from the laminated slab 1.

[0045] ​Compared with the embodiment one, in the embodiment two, since the side surface of the laminated slab 1 is a smooth surface, only the rubber pad 19 can be used as a small concave-convex compensation, and the laser is not needed to prompt whether the side positioning surface is parallel and attached to the laminated slab 1, so the laser emitter 17 can be omitted, the production cost can be reduced, and the working process can be reduced, but the installation positioning accuracy is also reduced. For the laminated slab 1 side wall, if the protrusion is required to be higher, the installation position needs to be continuously adjusted and observed to determine whether it needs to be replaced, and in the design with the laser prompt, the laser point size can be observed directly, and it can be directly judged whether it needs to be continuously adjusted or directly replaced. In summary, under the condition that the production cost is not strictly controlled, it is more suitable to select the design with the laser emitter 17.

[0046] For the embodiments not mentioned in the embodiment two, they are the same as the embodiment one, and will not be described in detail here.

[0047] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A prefabricated composite slab construction hoisting system, comprising: The composite plate (1), the mold platform (2), the tower crane (3), the keel (4) and the control system are provided, wherein: the mold platform (2) is used to install the composite plate (1), the tower crane (3) is used to hoist the composite plate (1) onto the mold platform (2), and the composite plate (1) is provided with the keel (4); Its characteristic is that it further includes: A positioning device is provided on the composite plate (1). The positioning device is used to quickly position the composite plate (1) to the installation position and make it flush with the mold table (2). The positioning device includes an installation frame (5), a positioning block (6) is installed at the bottom of the installation frame (5), a support rod (7) is installed inside the installation frame (5), a clamping plate (8) is movably installed on the support rod (7), a spring (9) is sleeved outside the support rod (7) and between the clamping plate (8) and the installation frame (5), a side positioning plate (30) is provided on both the clamping plate (8) and the installation frame (5), and a locking component for locking and fixing the position of the clamping plate (8) is provided on the top of the installation frame (5); The locking assembly includes a cam (10) which is rotatably mounted on the top of the mounting frame (5), and an operating lever (11) is mounted on the cam (10). The support rod (7) is hollow, and a connecting rod (23) is movably installed inside the support rod (7). A lever (24) is rotatably installed at the bottom of the mounting frame (5). A suction cup (25) is installed at the bottom of the mounting frame (5). A piston (26) is movably installed at the center of the suction cup (25). The piston (26) and the connecting rod (23) are rotatably installed on both sides of the lever (24). The bottom of the piston (26) is connected to the mounting frame (5) by a spring (28). A protrusion (27) is provided at the top of the connecting rod (23). The protrusion (27) cooperates with the cam (10).

2. The prefabricated composite slab construction hoisting system according to claim 1, characterized in that: A ratchet (12) is provided on the cam (10), and a pawl (13) is provided on the top of the mounting frame (5). The pawl (13) and the ratchet (12) cooperate with each other. A reset component is provided at the pawl (13) for releasing the pawl (13) from the ratchet (12) and fine-tuning the contact position between the pawl (13) and the ratchet (12).

3. The prefabricated composite slab construction hoisting system according to claim 2, characterized in that: The reset assembly includes a fine-tuning block (14), which is movably mounted on the top of the mounting frame (5). The fine-tuning block (14) is connected to the mounting frame (5) by a spring (15). A pawl (13) is rotatably mounted on the fine-tuning block (14). A fine-tuning nut (16) is mounted on the top of the fine-tuning block (14). A release lever (29) is provided on the fine-tuning block (14).

4. The prefabricated composite slab construction hoisting system according to claim 1, characterized in that: Multiple laser emitters (17) are mounted on the mounting frame (5), and light-transmitting holes (18) are provided on the clamping plate (8), with the light-transmitting holes (18) cooperating with the laser emitters (17).

5. The prefabricated composite slab construction hoisting system according to claim 1, characterized in that: The clamp (8) is provided with toothed protrusions.

6. The prefabricated composite slab construction hoisting system according to claim 1, characterized in that: Rubber pads (19) are provided on both the mounting frame (5) and the part of the clamping plate (8) that contacts the overlapping plate (1), and rubber pads (19) are also provided on the side positioning plate (30).

7. The prefabricated composite slab construction hoisting system according to claim 1, characterized in that: A fine-tuning screw (20) is installed on the positioning block (6). The fine-tuning screw (20) is threadedly connected to the mounting frame (5). A fine-tuning nut (21) is installed on the fine-tuning screw (20). A scale (22) is provided on the side wall of the base of the mounting frame (5).

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