Prestressed laminated slab hoisting and pre-tightening device

Abstract

The present application belongs to the field of building prefabricated component hoisting, and discloses a prestressed laminated slab hoisting pre-tightening device, comprising two hoisting bases, a hoisting main horizontal plate, two supporting assemblies, two protection assemblies, two deflection rope clamping assemblies and two driving assemblies; in use, the self-weight linkage double-air-path synchronous coupling structure is used, the vertical self-weight displacement of the laminated slab hoisting is used as the only power source, without electric control, hydraulic pressure, external air source and manual auxiliary operation, the laminated slab side edge flexible air pressure anti-cracking protection and the steel wire rope self-adaptive deflection clamping self-locking double functions are synchronously linked, the problems of traditional hoisting rope easy to slip and shake, slab easy to collapse and crack, uneven stress, poor adaptability and high external source equipment failure rate are solved, air pressure self-adaptive pressure boosting is realized through inclined plane wedge pressure transmission, the slab holding force and the steel wire rope clamping force are automatically matched according to the hoisting load size, and the self-adaptive protection effect of light load flexible adaptation and heavy load rigid self-locking is achieved.

Description

Technical Field

[0001] This invention relates to the field of precast building component hoisting technology, and in particular to a prestressed composite slab hoisting and pre-tightening device. Background Technology

[0002] Prestressed composite slabs are commonly used prefabricated components in prefabricated buildings. They have advantages such as high strength, good integrity, and high construction efficiency. At present, the hoisting operation of prestressed composite slabs on construction sites mostly adopts the traditional hoisting tool and steel wire rope direct binding hoisting method.

[0003] Traditional hoisting structures have limited functionality and suffer from numerous technical defects during actual construction: First, wire rope hoisting is susceptible to swaying, slippage, and tilting due to wind, hoisting inertia, and shifts in the center of gravity of the panels, resulting in poor stability of the hoisting points and uneven stress on the composite panels. Second, traditional hoisting equipment only has simple suspension functions and lacks specific protective structures for the panels. During hoisting, the edges and corners of the composite panels are prone to hard contact, squeezing, bumping, and friction with the hoisting equipment, frequently causing quality problems such as edge chipping, corner breakage, micro-cracks on the panel surface, and deformation due to self-weight, which seriously affect the forming quality of the composite panels and the accuracy of subsequent assembly. Third, existing intelligent hoisting equipment mostly relies on external power sources such as electric control, hydraulics, and external air sources, resulting in complex structures, high costs, poor adaptability to construction sites, high failure rates in harsh construction environments, and cumbersome maintenance. Purely mechanical hoisting equipment generally only has single clamping or supporting functions and cannot simultaneously achieve panel protection and anti-sway self-locking of the hoisting ropes, resulting in poor linkage and adaptive performance.

[0004] In summary, existing composite slab hoisting technologies suffer from shortcomings such as poor protection, insufficient stability, weak adaptability, and lack of intelligent passive linkage, making it difficult to meet the safety, high quality, and high efficiency requirements for hoisting and construction of prefabricated components for high-standard prefabricated buildings. Summary of the Invention

[0005] The present invention provides a prestressed composite slab hoisting pre-tightening device, which achieves passive synchronous protection and rope self-locking through a self-weight linkage dual air circuit coupling pure mechanical structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a prestressed composite slab hoisting pre-tightening device, comprising: two hoisting bases, a hoisting main horizontal plate, two support components, two protective components, two deflection rope clamping components, and two drive components; Two lifting bases are symmetrically fixed on the left and right sides of the main lifting plate. A lifting seat is fixedly installed at the center of the top surface of the main lifting plate. A hook is suspended inside the lifting seat, and a wire rope is fixedly installed on one side of the hook. The two supporting components are vertically slidably disposed on the inner side of the two lifting bases, and the two protective components are disposed on one side of the two lifting bases and are linked with the two supporting components respectively; Two deflection rope clamping assemblies are symmetrically installed on the top of the main hoisting horizontal plate, and two drive assemblies are respectively connected between the two deflection rope clamping assemblies and the two support assemblies.

[0007] As a further improvement of the present invention: both of the supporting components include a sliding plate, a trapezoidal pressure block, a supporting plate and a lateral limiting plate; The sliding plate is vertically slidably disposed on the inner wall of the hoisting base. The trapezoidal pressure block is fixedly installed on the top of the sliding plate. The supporting plate is fixedly installed on the bottom of the sliding plate. The lateral limiting plate is fixedly disposed on the upper side of the supporting plate. The supporting plate is used to support the bottom surface of the composite plate. The lateral limiting plate is fitted to the side of the composite plate.

[0008] As a further improvement of the present invention: both of the protective components include flexible side airbags, two sealed air cylinders, two upright plates, two transmission push rods, two wedge-shaped top blocks, two first return springs and two air guiding hoses; The two sealed air cylinders are fixedly installed on both sides of the inner wall of the hoisting base, and the two upright plates are slidably embedded in the inner walls of the two sealed air cylinders. The inner sides of the two upright plates are fixedly connected to the two transmission push rods.

[0009] As a further improvement of the present invention: the ends of the two transmission push rods are respectively fixedly disposed on the opposite sides of the two wedge-shaped top blocks, and the two wedge-shaped top blocks are in contact with the inclined surface of the trapezoidal pressure block for transmission.

[0010] As a further improvement of the present invention: two first reset springs are respectively disposed between the two upright plates and the inner walls of the two sealed air cylinders, and the two sealed air cylinders are respectively connected to the flexible side airbags through two air guiding hoses, and the flexible side airbags are fixedly installed on the inner side of the lateral limiting plate.

[0011] As a further improvement of the present invention: both of the deflection rope clamping assemblies include a fixed shaft, a sleeve, a circular plate, a telescopic push rod, an anti-slip rope clamping sleeve, a second return spring, a spherical air guide joint, an air storage cylinder, a compression plunger, a vertical linkage rod, and a high-pressure air guide pipe. The fixed shaft is fixedly installed on the top of the hoisting main horizontal plate. The sleeve is movably sleeved on the outer surface of the fixed shaft and can deflect and rotate around the fixed shaft. The circular plate is movably embedded in the inner wall of the sleeve. The telescopic push rod is fixedly installed on one side of the circular plate. The anti-slip rope clamp is fixed to the end of the telescopic push rod and is arranged corresponding to the position of the wire rope.

[0012] As a further improvement of the present invention: the second reset spring is movably sleeved on the outer surface of the telescopic push rod, the spherical air guide joint is installed on the rear side of the sleeve, the air storage cylinder is fixedly installed on the top of the hoisting base, and the extrusion plunger is vertically slidably embedded in the inner wall of the air storage cylinder.

[0013] As a further improvement of the present invention: the two ends of the vertical linkage rod are respectively fixedly connected to the extrusion plunger and the trapezoidal pressure block, the air storage cylinder is sealed and connected to the spherical air guide joint through the high-pressure air guide pipe, and the inner wall of the anti-slip rope sleeve is evenly provided with multiple anti-slip stripes.

[0014] As a further improvement of the present invention: both of the driving components include a slot plate, a push block, a transmission link and a hinged support; The groove plate is fixedly installed at the bottom of the sleeve, the push block is slidably installed on the inner wall of the groove plate, the hinge support is fixedly installed on one side of the sliding plate, and the two ends of the transmission connecting rod are respectively hinged to the hinge support and the push block.

[0015] As a further improvement of the present invention: slots are provided on both the left and right sides of the main hoisting horizontal plate, and the transmission connecting rod is arranged through the slots.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are as follows: This invention employs a purely mechanical, self-weight-linked, dual-air-path synchronous coupling structure design. Using the vertical self-weight displacement of the composite slab during hoisting as the sole power source, it eliminates the need for electrical control, hydraulics, external air sources, and manual assistance. This achieves simultaneous linkage of flexible pneumatic anti-crack protection on the side of the composite slab and adaptive deflection clamping self-locking of the wire rope. It overcomes the technical shortcomings of traditional hoisting methods, such as slippage and swaying of the hoisting ropes, easy edge chipping and cracking of the slab, uneven stress, poor adaptability, and high failure rate of external equipment. The overall design features a symmetrical structure, ensuring uniform and stable hoisting force. Adaptive air pressure boosting is achieved through inclined wedge pressure transmission, automatically matching the slab clamping force and wire rope clamping force according to the hoisting load, achieving an adaptive protection effect of flexible adaptation under light loads and rigid self-locking under heavy loads. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a scenario for a prestressed composite slab hoisting and pre-tightening device proposed in this invention.

[0018] Figure 2 This application provides a schematic diagram of the overall structure of a prestressed composite slab hoisting and pre-tightening device.

[0019] Figure 3 This is a cross-sectional structural diagram of the hoisting base in an embodiment of this application.

[0020] Figure 4 This is a schematic diagram of the structure of the protective component in the embodiments of this application.

[0021] Figure 5 This is a cross-sectional view of the sealed air cylinder in an embodiment of this application.

[0022] Figure 6This is a cross-sectional view of the gas storage cylinder in an embodiment of this application.

[0023] Figure 7 This is a schematic diagram of the structure for hoisting the main horizontal plate in an embodiment of this application.

[0024] Figure 8 This is a cross-sectional view of the sleeve in an embodiment of this application.

[0025] Legend: 1. Lifting base; 2. Lifting main horizontal plate; 201. Lifting seat; 202. Hook; 203. Steel wire rope; 3. Sliding plate; 301. Trapezoidal pressure block; 302. Support plate; 303. Lateral limiting plate; 304. Flexible side airbag; 4. Sealed air cylinder; 401. Vertical plate; 402. Transmission push rod; 403. Wedge-shaped top block; 404. First return spring; 405. Air guide spring 6. Pipe; 6. Fixed shaft; 601. Sleeve; 602. Circular plate; 603. Telescopic push rod; 604. Anti-slip rope sleeve; 605. Second return spring; 606. Spherical air guide joint; 607. Air storage cylinder; 608. Extrusion plunger; 609. Vertical linkage rod; 610. High-pressure air guide pipe; 5. Groove plate; 501. Push block; 502. Transmission connecting rod; 503. Hinge support; 504. Groove opening. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1 - Figure 8 This invention provides a prestressed composite slab hoisting and pre-tightening device, comprising: two hoisting bases 1, a main hoisting horizontal plate 2, two support components, two protective components, two deflection rope clamping components, and two drive components; the two hoisting bases 1 are symmetrically fixed on the left and right sides of the main hoisting horizontal plate 2, a hoisting seat 201 is fixedly installed at the center of the top surface of the main hoisting horizontal plate 2, a hook 202 is suspended on the inner side of the hoisting seat 201, and a wire rope 203 is fixedly installed on one side of the hook 202; the two support components are vertically slidably installed on the inner side of the two hoisting bases 1, and the two protective components are respectively installed on one side of the two hoisting bases 1 and are linked with the two support components; the two deflection rope clamping components are symmetrically installed on the top of the main hoisting horizontal plate 2, and the two drive components are respectively connected between the two deflection rope clamping components and the two support components.

[0028] In use, the entire device forms an integral frame structure by hoisting the main horizontal plate 2 and the double-sided hoisting base 1. Two sets of vertically sliding support components provide bottom support and side limit for the prestressed composite slab. Two sets of protective components follow the displacement of the support components and trigger air pressure boosting to achieve flexible anti-crack pre-tightening protection for the slab. At the same time, two sets of drive components follow the vertical displacement of the support components and drive the two sets of deflection rope clamping components at the top to adaptively deflect and pneumatically push out, forming a two-way clamping and self-locking protection for the steel wire rope 203 in the middle. The whole machine relies on the coordinated cooperation of symmetrical multi-components to simultaneously complete the slab protection and rope anti-sway clamping operation by only displacing the composite slab by its own weight.

[0029] In this embodiment, the main horizontal lifting plate 2 and the double-sided lifting base 1 form an overall rigid load-bearing frame of the device, ensuring that the lifting force is uniform and symmetrical and that there will be no unilateral load. The lifting base 201, hook 202 and wire rope 203 constitute the only suspension force point of the whole machine, realizing stable lifting. Each component is assembled in layers, so that the support displacement, air pressure protection, linkage drive and rope clamping self-locking can be synchronously linked by the weight of the composite plate, providing a structural foundation for the passive adaptive operation of the whole machine.

[0030] like Figure 1 - Figure 8 As shown, in one embodiment, both supporting components include a sliding plate 3, a trapezoidal pressure block 301, a supporting plate 302, and a lateral limiting plate 303. The sliding plate 3 is vertically slidably disposed on the inner wall of the hoisting base 1. The trapezoidal pressure block 301 is fixedly installed on the top of the sliding plate 3. The supporting plate 302 is fixedly installed on the bottom of the sliding plate 3. The lateral limiting plate 303 is fixedly disposed on the upper side of the supporting plate 302. The supporting plate 302 is used to support the bottom surface of the composite plate, and the lateral limiting plate 303 is fitted against the side of the composite plate. The sliding plate 3 can slide freely vertically along the hoisting base 1, so that the weight of the composite plate can be directly converted into vertical driving stroke. The bottom support plate 302 adopts a surface contact support method to avoid local stress concentration and pressure damage to the corners of the composite plate. The lateral limiting plate 303 can initially limit the left and right lateral positions of the composite plate to prevent the plate from shifting significantly during hoisting. The top trapezoidal pressure block 301 rises and falls synchronously with the sliding plate 3, providing a unified power input for subsequent inclined plane pressurization, connecting rod deflection, and rope clamping linkage, realizing the linkage foundation of one movement for all movements.

[0031] like Figure 1 - Figure 8As shown, in one embodiment, both protective components include flexible side airbags 304, two sealed air cylinders 4, two upright plates 401, two transmission push rods 402, two wedge-shaped top blocks 403, two first return springs 404, and two air guide hoses 405. The two sealed air cylinders 4 are respectively fixedly installed on both sides of the inner wall of the hoisting base 1. The two upright plates 401 are respectively slidably embedded in the inner wall of the two sealed air cylinders 4. The inner sides of the two upright plates 401 are fixedly connected to the two transmission push rods 402. The double-sided sealed air cylinders 4 are independent sealed air storage chambers that can store compressed air and provide air pressure source for the flexible side airbags 304. The upright plates 401 and the transmission push rods 402 slide horizontally synchronously, which can change the effective volume inside the sealed air cylinders 4 and realize mechanical compression and pressurization. No external air source is required. The air pressure is generated entirely by mechanical displacement, which is suitable for harsh working conditions on the construction site.

[0032] Furthermore, the ends of the two transmission push rods 402 are respectively fixed on the opposite sides of the two wedge-shaped top blocks 403. The two wedge-shaped top blocks 403 are in contact with the inclined surface of the trapezoidal pressure block 301 for transmission. The trapezoidal pressure block 301 moves vertically downward to squeeze the wedge-shaped top blocks 403. The vertical linear displacement is efficiently converted into horizontal lateral displacement by utilizing the inclined surface transmission principle, realizing mechanical pressurization without a power source. The inclined surface contact transmission has adaptive compensation capability. The greater the downward stroke of the sliding plate 3, the greater the squeezing amount and the higher the air pressure inside the sealed air cylinder 4. The protective pressure can be adaptively matched according to the lifting weight, and the protective effect is adaptively enhanced with the load.

[0033] Furthermore, two first return springs 404 are respectively located between the two upright plates 401 and the inner walls of the two sealed air cylinders 4. The two sealed air cylinders 4 are respectively connected to the flexible side airbags 304 through two air guide hoses 405. The flexible side airbags 304 are fixedly installed inside the lateral limiting plate 303. The first return springs 404 are used to automatically push the upright plates 401 back to their original positions after the lifting force is released, so that the volume of the sealed air cylinders 4 is automatically restored and the internal air pressure is released, realizing the automatic reset of the mechanism without manual operation. The air guide hoses 405 realize the air passage between the sealed air cylinders 4 and the flexible side airbags 304, and the compressed gas is quickly introduced into the airbag, so that the airbag expands and hugs the side of the composite plate. The flexible buffer characteristics are used to offset the impact of the lifting sway, effectively preventing the corners of the composite plate from cracking and the surface from cracking.

[0034] like Figure 1 - Figure 8As shown, in one embodiment, both deflection rope clamping assemblies include a fixed shaft 6, a sleeve 601, a circular plate 602, a telescopic push rod 603, an anti-slip rope clamping sleeve 604, a second return spring 605, a spherical air guide joint 606, an air storage cylinder 607, a compression plunger 608, a vertical linkage rod 609, and a high-pressure air guide pipe 610; the fixed shaft 6 is fixedly installed on the top of the hoisting main horizontal plate 2, the sleeve 601 is movably sleeved on the outer surface of the fixed shaft 6 and can deflect and rotate around the fixed shaft 6, the circular plate 602 is movably embedded in the inner wall of the sleeve 601, and the telescopic push rod 603... 3. Fixedly installed on one side of the circular plate 602, the anti-slip rope clamp 604 is fixed to the end of the telescopic push rod 603 and is arranged corresponding to the position of the wire rope 203. The fixed shaft 6 provides a stable rotation fulcrum for the sleeve 601, so that the sleeve 601 can adapt to the angle deflection and adapt to the slight sway during the wire rope hoisting process. The circular plate 602 and the telescopic push rod 603 can slide and feed stably inside the sleeve 601 to ensure that the rope clamping action is linear and smooth. The anti-slip rope clamp 604 is arranged directly opposite the wire rope 203 and can be aligned and clamped to provide structural support for anti-slip and anti-shaking.

[0035] Furthermore, the second return spring 605 is movably sleeved on the outer surface of the telescopic push rod 603, the spherical air guide joint 606 is installed on the rear side of the sleeve 601, the air storage cylinder 607 is fixedly installed on the top of the hoisting base 1, and the extrusion plunger 608 is vertically slidably embedded in the inner wall of the air storage cylinder 607. The second return spring 605 normally maintains the telescopic push rod 603 in the open and reset state, and automatically retracts to loosen the rope after unloading, realizing cyclic operation. The spherical air guide joint 606 has an angle adaptive sealing capability and can synchronously adjust the angle with the deflection of the sleeve 601. During the rotation, the air passage is always sealed and leak-free. The air storage cylinder 607 and the extrusion plunger 608 cooperate to form a special pressurized air passage for top rope clamping, which is independent of the plate protection air passage. The two air passages do not interfere with each other and work synchronously.

[0036] Furthermore, the vertical linkage rod 609 is fixedly connected to the compression plunger 608 and the trapezoidal pressure block 301 at both ends, and the air storage cylinder 607 is sealed and connected to the spherical air connector 606 through the high-pressure air pipe 610. The inner wall of the anti-slip rope clamp 604 is evenly provided with multiple anti-slip stripes. The vertical linkage rod 609 can synchronously transmit the vertical displacement of the sliding plate 3 and the trapezoidal pressure block 301 to the compression plunger 608, realize the synchronous pressurization of the air storage cylinder 607, and ensure that the rope clamping action and the plate protection action are completely synchronized. The high-pressure air pipe 610 transmits gas to provide air pressure power for the feed of the telescopic push rod 603. The anti-slip stripes can greatly improve the friction coefficient between the clamp and the wire rope, prevent the lifting rope from slipping, slipping, and swaying during heavy-load hoisting, and improve the hoisting stability.

[0037] like Figure 1 - Figure 8 As shown, in one embodiment, both drive components include a slot plate 5, a push block 501, a transmission link 502, and a hinged support 503; as Figure 1 - Figure 8 As shown, in one embodiment, the slot plate 5 is fixedly disposed at the bottom of the sleeve 601, the push block 501 is slidably disposed on the inner wall of the slot plate 5, the hinge support 503 is fixedly disposed on one side of the sliding plate 3, and the two ends of the transmission connecting rod 502 are respectively hinged to the hinge support 503 and the push block 501. The slot plate 5 provides a vertical sliding limit track for the push block 501 to ensure that the pushing operation is smooth and does not deviate. The hinge support 503 moves synchronously with the sliding plate 3, driving the transmission connecting rod 502 to adaptively change the angle of swing, converting the vertical displacement into the vertical pushing stroke of the push block 501, and finally driving the sleeve 601 to deflect as a whole, realizing mechanical clamping. The pure mechanical hinge transmission has high reliability, no jamming, and no risk of failure.

[0038] Furthermore, slots 504 are provided on both the left and right sides of the main horizontal plate 2. The transmission connecting rod 502 passes through the slots 504. The slots 504 provide dedicated clearance for the angular swing and vertical displacement of the transmission connecting rod 502, completely avoiding the interference between the connecting rod movement and the main horizontal plate structure, and ensuring smooth and unobstructed linkage throughout the entire stroke.

[0039] Working principle: The initial state of the device before hoisting is the normal reset state. The first reset spring 404 is in the fully extended state. The elastic push plate 401, the transmission push rod 402 and the wedge-shaped top block 403 are kept in the outward push state, so that the inclined end face of the wedge-shaped top block 403 is in contact with the inclined end face of the trapezoidal pressure block 301 to form a preset inclined surface transmission pair. At the same time, the second reset spring 605 is in the extended reset state, driving the telescopic push rod 603 and the end anti-slip rope sleeve 604 to remain in the open and relaxed state, without clamping pre-tightening force. At this time, there is no air pressure input inside the flexible side airbag 304, and it is in the contracted and fitted state, which can smoothly complete the alignment and fitting assembly operation with the composite plate. During actual hoisting, the entire assembly is installed on the outside of the composite slab to be hoisted, with the two side support plates 302 horizontally attached to the bottom surface of the composite slab. The lateral limiting plate 303 and the retracted flexible side airbag 304 are attached to the left and right sides of the composite slab. After the assembly and positioning are completed, the entire machine is lifted and subjected to force by the steel wire rope 203, hook 202 and hoisting base 201. When the composite slab is completely suspended, the weight of the composite slab itself continues to press down on the sliding plate 3, driving the sliding plate 3 to slide vertically downward along the inner wall of the hoisting base 1, providing a unique driving stroke for the linkage of the entire machine. As the sliding plate 3 moves vertically downward, it simultaneously drives the trapezoidal pressure block 301 fixed at the top to move downward. The inclined surfaces on both sides of the trapezoidal pressure block 301 simultaneously squeeze the wedge-shaped top blocks 403 symmetrically arranged on both sides, forcing the two wedge-shaped top blocks 403 to produce relative horizontal displacement. Through the transmission push rod 402, the vertical plate 401 is driven to slide laterally along the inner wall of the sealed air cylinder 4, simultaneously compressing the first reset spring 404. The sealed cavity volume inside the sealed air cylinder 4 is squeezed and contracted, generating high-pressure airflow. The high-pressure gas is introduced into the flexible side airbag 304 assembled inside the side limiting plate 303 through the air guide hose 405, causing the flexible side airbag 304 to expand rapidly and evenly, flexibly adhering to and hugging the side of the plate from the left and right sides of the composite plate. With the full-area surface support and limitation of the bottom support plate 302, it can effectively offset the lateral sway and eccentric stress during the hoisting process, and prevent the composite plate from cracking at the corners, micro-cracks on the plate surface, and deformation due to its own weight. While the composite plate drives the sliding plate 3 downward to achieve air pressure protection of the plate, the top steel wire rope self-locking clamping linkage mechanism is triggered simultaneously. The hinged support 503 fixed on the inner side of the sliding plate 3 moves vertically with the sliding plate 3, pulling the transmission link 502 to adaptively change the tilt angle. The transmission link 502 passes through the slots 504 opened on both sides of the hoisting main horizontal plate 2 to complete the angle swing. The slots 504 provide sufficient clearance for the dynamic displacement of the link to avoid mechanical motion interference. The top of the transmission link 502 is hinged to the push block 501, so that the push block 501 slides vertically along the inner wall of the slot plate 5, thereby driving the slot plate 5 and the top fixed sleeve 601 to deflect upward around the fixed shaft 6. At the same time, as the trapezoidal pressure block 301 at the top of the sliding plate 3 moves downward, the vertical linkage rod 609 drives the compression plunger 608 to slide vertically downward along the inner wall of the air storage cylinder 607, compressing the gas inside the air storage cylinder 607. The airflow is introduced into the internal air passage of the sleeve 601 through the high-pressure air guide pipe 610 and the ball air guide connector 606. The air pressure drives the circular plate 602 and the telescopic push rod 603 to extend horizontally, compressing the second return spring 605 and driving the end anti-slip clamping rope sleeve 604 to feed inward. Combining the inward deflection of the sleeve 601 with the pneumatic feeding action of the telescopic push rod 603, the anti-slip rope clamps 604 on both sides simultaneously clamp the steel wire rope 203 in the middle. Relying on the anti-slip stripes on the inner wall to form a high-strength friction self-locking, a dual self-locking effect of mechanical deflection and clamping + pneumatic push clamping is achieved. Moreover, the greater the lifting load and the greater the downward stroke of the sliding plate 3, the more the airbag clamping force and the steel wire rope clamping force are synchronously and adaptively enhanced, achieving an adaptive protection effect of flexible adaptation for light loads and rigid self-locking for heavy loads, thus solving the problems of rope swaying, slippage, and deviation. Once the composite slab is hoisted into place and the force is released upon landing, the downward pressure load on the sliding plate 3 completely disappears. At this point, the first return spring 404 and the second return spring 605 simultaneously and elastically rebound to reset, driving the sealed air cylinder 4 and the air storage cylinder 607 to release pressure. The flexible side airbag 304 contracts and releases the slab, and the anti-slip rope clamp 604 retracts and releases the wire rope 203. Simultaneously, all connecting rods, sliding structures, and deflection structures return to their initial normal positions. The entire machine automatically completes the reset of all mechanisms without manual adjustment, allowing for the next hoisting operation to proceed directly.

[0040] The above-mentioned models are all commercially available products in the prior art. This application is only used as an example of an embodiment and does not limit the use of other equivalent models.

[0041] All standard parts used in this application can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prestressed composite slab hoisting and pre-tightening device, characterized in that, include: Two hoisting bases (1), a hoisting main horizontal plate (2), two support components, two protective components, two deflection rope clamping components, and two drive components; Two hoisting bases (1) are symmetrically fixed on the left and right sides of the hoisting main horizontal plate (2). A hoisting seat (201) is fixedly installed at the center of the top surface of the hoisting main horizontal plate (2). A hook (202) is suspended on the inner side of the hoisting seat (201). A wire rope (203) is fixedly installed on one side of the hook (202). The two supporting components are vertically slidably disposed on the inner side of the two lifting bases (1), and the two protective components are disposed on one side of the two lifting bases (1) and are linked with the two supporting components respectively; The two deflection rope clamping assemblies are symmetrically installed on the top of the hoisting main horizontal plate (2), and the two drive assemblies are respectively connected between the two deflection rope clamping assemblies and the two support assemblies.

2. The prestressed composite slab hoisting pre-tightening device according to claim 1, characterized in that: Both of the aforementioned support components include a sliding plate (3), a trapezoidal pressure block (301), a support plate (302), and a lateral limiting plate (303). The sliding plate (3) is vertically slidably disposed on the inner wall of the hoisting base (1). The trapezoidal pressure block (301) is fixedly installed on the top of the sliding plate (3). The supporting plate (302) is fixedly installed on the bottom of the sliding plate (3). The lateral limiting plate (303) is fixedly disposed on the upper side of the supporting plate (302). The supporting plate (302) is used to support the bottom surface of the composite plate. The lateral limiting plate (303) is attached to the side of the composite plate.

3. The prestressed composite slab hoisting pre-tightening device according to claim 2, characterized in that: Both of the aforementioned protective components include flexible side airbags (304), two sealed air cylinders (4), two upright plates (401), two transmission push rods (402), two wedge-shaped top blocks (403), two first return springs (404), and two air guide hoses (405). The two sealed air cylinders (4) are fixedly installed on both sides of the inner wall of the hoisting base (1), and the two upright plates (401) are slidably embedded in the inner wall of the two sealed air cylinders (4), and the inner sides of the two upright plates (401) are fixedly connected to the two transmission push rods (402).

4. The prestressed composite slab hoisting pre-tightening device according to claim 3, characterized in that: The ends of the two transmission push rods (402) are respectively fixed on the opposite sides of the two wedge-shaped top blocks (403), and the two wedge-shaped top blocks (403) are in contact with the inclined surface of the trapezoidal pressure block (301) for transmission.

5. The prestressed composite slab hoisting pre-tightening device according to claim 4, characterized in that: Two first reset springs (404) are respectively located between the two upright plates (401) and the inner walls of the two sealed air cylinders (4). The two sealed air cylinders (4) are respectively connected to the flexible side airbags (304) through two air guide hoses (405). The flexible side airbags (304) are fixedly installed on the inner side of the lateral limiting plate (303).

6. The prestressed composite slab hoisting pre-tightening device according to claim 1, characterized in that: Both of the aforementioned deflection rope clamping assemblies include a fixed shaft (6), a sleeve (601), a circular plate (602), a telescopic push rod (603), an anti-slip rope clamping sleeve (604), a second return spring (605), a spherical air guide joint (606), an air storage cylinder (607), a compression plunger (608), a vertical linkage rod (609), and a high-pressure air guide pipe (610). The fixed shaft (6) is fixedly installed on the top of the hoisting main horizontal plate (2). The sleeve (601) is movably sleeved on the outer surface of the fixed shaft (6) and can deflect and rotate around the fixed shaft (6). The circular plate (602) is movably embedded in the inner wall of the sleeve (601). The telescopic push rod (603) is fixedly installed on one side of the circular plate (602). The anti-slip rope clamp (604) is fixed to the end of the telescopic push rod (603) and is arranged corresponding to the position of the wire rope (203).

7. A prestressed composite slab hoisting pre-tightening device according to claim 6, characterized in that: The second reset spring (605) is movably sleeved on the outer surface of the telescopic push rod (603), the spherical air guide joint (606) is installed on the rear side of the sleeve (601), the air storage cylinder (607) is fixedly installed on the top of the hoisting base (1), and the extrusion plunger (608) is vertically slidably embedded in the inner wall of the air storage cylinder (607).

8. A prestressed composite slab hoisting pre-tightening device according to claim 7, characterized in that: The vertical linkage rod (609) is fixedly connected to the compression plunger (608) and the trapezoidal pressure block (301) at both ends respectively. The air storage cylinder (607) is sealed and connected to the spherical air connector (606) through the high-pressure air pipe (610). The inner wall of the anti-slip rope sleeve (604) is evenly provided with multiple anti-slip stripes.

9. A prestressed composite slab hoisting pre-tightening device according to claim 2, characterized in that: Both drive components include a slot plate (5), a push block (501), a transmission link (502), and a hinged support (503); The groove plate (5) is fixedly installed at the bottom of the sleeve (601), the push block (501) is slidably installed on the inner wall of the groove plate (5), the hinge support (503) is fixedly installed on one side of the sliding plate (3), and the two ends of the transmission connecting rod (502) are respectively hinged to the hinge support (503) and the push block (501).

10. A prestressed composite slab hoisting pre-tightening device according to claim 9, characterized in that: The main horizontal plate (2) for hoisting has slots (504) on both the left and right sides, and the transmission connecting rod (502) passes through the slots (504).

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