Hoisting, protecting and positioning integrated disassembly-free bottom die steel bar truss floor support plate construction device

Abstract

The invention provides a hoisting, protecting and positioning integrated disassembly-free bottom die steel bar truss floor support plate construction device, and belongs to the technical field of construction equipment. The device comprises a base which is provided with a rope positioning groove for hoisting; the steel bar truss is arranged on the base, and positioning scale marks and positioning holes are formed in the steel bar truss; the elastic protection piece is sleeved on the edge of the base; the corner sealing pieces are embedded in the corners of the base; the guide connecting piece is located between the steel bar truss and the steel beam connecting end, one end is fixed to the steel bar truss, and the other end is attached to the surface of the steel beam connecting end; the splicing pieces are arranged at the front end and the rear end of the base and used for splicing adjacent construction devices. The hoisting, protecting and positioning functions are integrated, the problems of equipment dispersion, low precision, insufficient low-carbon property and the like in traditional construction are solved, the industrial and low-carbon transformation requirements of the building industry are met, and the adaptability of construction equipment is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of construction equipment technology, and in particular to an integrated hoisting, protection, and positioning device for steel truss floor slab construction that requires no dismantling of the bottom formwork. Background Technology

[0002] In the prior art, the utility model patent with authorization announcement number CN206539034U discloses a steel truss floor decking packaging and hoisting support, which relies on the threaded connection of tie rods for load bearing. This easily induces deformation, leading to difficulties in disassembly. Furthermore, it lacks a self-locking structure and flexible buffer design, making it unable to effectively avoid problems such as slab slippage and edge damage.

[0003] Although the lifting device disclosed in the utility model patent with authorization announcement number CN207276041U optimizes the loading and unloading efficiency, it does not integrate the contact and limiting mechanism between the lifting device and the plate. When lifting, it is still difficult to stably control the tilt angle of the plate within 10°, and it fails to eliminate the hidden danger of plate displacement during the lifting process.

[0004] None of the aforementioned patents have achieved coordinated optimization of hoisting, protection, and positioning functions, and still require additional tools to assist in the operation, resulting in a cumbersome construction process and insufficient safety redundancy.

[0005] Traditional protective measures often use disposable wooden or foam pads. However, the prefabricated, non-removable floor decking disclosed in the utility model patent with authorization announcement number CN219175609U, although improving the splicing structure, has a base plate that cannot be recycled and reused, resulting in significant resource consumption, which contradicts the concept of low-carbon construction.

[0006] The utility model patent disclosed in CN217896920U only solves the problem of local leveling of adjacent plates. It does not design a targeted protective structure for the plate edges and splicing areas, resulting in a high grout leakage rate during concrete pouring, requiring additional repair costs and exacerbating construction waste pollution.

[0007] The reuse rate of existing protection-related patents is generally less than 30%, and an integrated protection solution adapted to hoisting and positioning processes has not been formed. This makes it impossible to effectively suppress panel damage during transportation and construction, resulting in a current damage rate of over 8%.

[0008] The leveling connector disclosed in the utility model patent with authorization announcement number CN217896920U can only achieve local leveling of adjacent plates, lacks an overall positioning benchmark, and is difficult to solve the defect that the welding fit between the truss and the steel beam is less than 80%, which significantly weakens the shear resistance of the structure.

[0009] The utility model patent with authorization announcement number CN222726981U discloses a steel truss floor deck positioning component. Although it achieves equal spacing adjustment of steel bars, it is not integrated with hoisting and protection functions. During construction, positioning tools still need to be deployed independently, and the cost of manual correction increases by more than 30%, making it difficult to meet the high precision requirements of industrialized construction.

[0010] Existing positioning patents generally have an error control accuracy greater than 5mm, which cannot meet the millimeter-level accuracy requirements for floor deck installation in modern prefabricated buildings.

[0011] Patents with authorization announcement numbers CN206539034U and CN207276041U focus on hoisting optimization, patents CN217896920U and CN222726981U emphasize positioning and leveling, and patent CN219175609U focuses on splicing structures. None of them form a three-in-one integrated design of "hoisting-protection-positioning".

[0012] In summary, the distributed technology solutions in the existing technologies result in poor adaptability of construction equipment, difficulty in systematically controlling carbon emissions, and an inability to overcome the efficiency losses caused by "multiple equipment switching and multiple process superpositions," which is a significant gap that urgently needs to be bridged with the goal of low-carbon and industrial transformation of the construction industry. Summary of the Invention

[0013] In view of this, in order to solve the technical problem of poor compatibility of construction equipment caused by the decentralized technical solutions in the existing technology, the present invention provides an integrated hoisting, protection and positioning steel truss floor deck construction device that does not require dismantling of the bottom formwork. It integrates hoisting, protection and positioning functions, and solves the problems of decentralized equipment, low precision and insufficient low carbon emissions in traditional construction. It is adapted to the needs of industrialization and low carbon transformation of the construction industry and significantly improves the compatibility of construction equipment.

[0014] To achieve the above objectives, the present invention provides the following technical solution: A hoisting, protective, and positioning integrated construction device for steel truss floor slabs that requires no dismantling of the bottom formwork, comprising: The base has rope positioning grooves for hoisting; A steel truss is mounted on the base, and is provided with positioning scale lines and positioning holes; An elastic protective element is fitted onto the edge of the base; Corner seals are fitted into the corners of the base; A guide connector is located between the steel truss and the steel beam connection end, with one end fixed to the steel truss and the other end used to fit against the surface of the steel beam connection end; The splicing components are located at the front and rear ends of the base and are used for splicing adjacent construction devices.

[0015] Preferably, the steel truss comprises: Horseshoe-shaped steel bars are installed on the base; The web reinforcement is connected to the horseshoe-shaped reinforcement; The top chord reinforcement is connected to the web reinforcement.

[0016] Preferably, a connecting block is provided at the upper end of the web reinforcement bar, a fixing pin is welded on the connecting block, and a welding point adapted to the fixing pin is provided at the lower end of the upper chord reinforcement bar, and the fixing pin is welded to the welding point for fixation.

[0017] Preferably, the splicing component includes: Mounting holes are provided at the front and rear ends of the base; The upper and lower hanging rods are respectively installed in the mounting holes at the front and rear ends of the base, and both protrude from the mounting holes; The upper hanging rod has a slot at its front end, and the lower hanging rod has a insert at its front end that fits the slot. The insert is then inserted into the slot and locked in place by bolts.

[0018] Preferably, the base has alignment grooves at its four corner edges, and a reflective lens is installed in the alignment groove. The alignment of the base is determined by irradiating the reflective lens with a laser.

[0019] Preferably, the correction groove is a U-shaped groove, and the reflective lens is made of tempered glass and is embedded in the correction groove with waterproof adhesive.

[0020] Preferably, limit blocks are evenly arranged in the rope positioning groove. The limit blocks are distributed in a stepped manner on the inner surface of the rope positioning groove, and the distance between adjacent limit blocks is 100-150mm, which is used to limit the position of the hoisting rope to prevent the rope from shifting during hoisting.

[0021] Preferably, the rope positioning groove has a U-shaped structure, the limiting block is made of rubber and protrudes from the inner surface of the rope positioning groove, the cross-section of the limiting block is trapezoidal, and the side of the limiting block facing the rope insertion direction is an inclined surface, while the other side is a vertical surface.

[0022] Preferably, the elastic protective component is made of high-strength rubber and has a honeycomb-shaped buffer structure inside.

[0023] Preferably, the guide connector is an arc-shaped metal sheet with serrations.

[0024] This invention integrates hoisting, protection, and positioning functions, solving problems such as dispersed equipment, low precision, and insufficient low-carbon features in traditional construction. It adapts to the industrialization and low-carbon transformation needs of the construction industry, significantly improving the adaptability of construction equipment. Compared to existing technologies, it has the following beneficial effects: (1) A full-process protection system is formed by recyclable elastic protective components and corner seals. Among them, the elastic protective components can buffer the impact force during transportation and hoisting, reducing the breakage rate of the plate edge from 8% in the existing technology to less than 2%, and can be disassembled and reused, which greatly improves the reuse rate compared to the existing level of less than 30%; the corner seals, together with the elastic protective components on the edge of the base, form a double anti-leakage structure, reducing the leakage problem during concrete pouring and subsequent repair costs, reducing the generation of construction waste, and meeting the requirements of low-carbon construction.

[0025] (2) The integrated positioning components significantly improve installation accuracy. The steel truss is equipped with positioning scale lines with an accuracy of 1mm and positioning holes with a diameter of 8-10mm and a spacing of 500mm. It can be used with a laser positioning instrument to achieve an installation error of ≤3mm for a single floor deck, which solves the problem that the error of existing positioning patents is mostly above 5mm. The fit between the guide connector and the steel beam is ≥95%, which is less than 80% of the fit of traditional welding, effectively improving the shear resistance of the structure. The base correction groove has a built-in reflective lens, which detects the splicing alignment error by the overlap of the laser irradiation spot, ensuring the splicing accuracy of multiple panels.

[0026] (3) The splicing and hoisting structure design optimizes the construction process. The upper and lower hanging rods are quickly spliced ​​together by slot-insert plate cooperation and bolt locking. The filling space formed by the installation holes is filled with concrete to enhance the strength of the cast-in-place concrete. The rope positioning groove is distributed with stepped limiting blocks, with inclined surface guidance and vertical surface limiting to avoid displacement of the hoisting rope and improve hoisting safety.

[0027] In summary, the present invention adopts an integrated design of "lifting-protection-positioning", which avoids the problems of poor compatibility of construction equipment and complicated procedures caused by the dispersion of lifting, protection and positioning functions in the prior art. It reduces the efficiency loss caused by switching multiple equipment and superimposing multiple procedures, and adapts to the needs of the construction industry for low-carbon and industrial transformation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of a steel truss structure. Figure 3 This is a structural diagram of the upper hanging rod in the splicing component; Figure 4 This is a structural diagram of the lower hanging rod in the splicing component; Figure 5 This is a schematic diagram of the rope positioning groove. Figure 6 This is a schematic diagram of the base plate structure; Figure 7 This is a schematic diagram of the bottom mold structure; In the diagram, 1. Base plate; 2. Bottom formwork; 3. Steel truss; 4. Correction groove; 5. Reflecting lens; 6. Rope positioning groove; 7. Limiting block; 8. Positioning hole; 9. Horseshoe reinforcement; 10. Web reinforcement; 11. Top chord reinforcement; 12. Connecting block; 13. Fixing pin; 14. Mounting hole; 15. Upper hanging rod; 16. Slot; 17. Lower hanging rod; 18. Insert; 19. Elastic protective component; 20. Corner seal; 21. Buckle; 22. Positioning post; 23. Mounting groove. Detailed Implementation

[0029] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be noted that the terms "upper", "lower", "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 limitations on this invention.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] like Figure 1 As shown, the present invention provides an integrated hoisting, protection, and positioning device for constructing steel truss floor slabs without dismantling the bottom formwork, comprising: The base is used to support the steel truss and concrete loads, and has rope positioning grooves 6 for hoisting.

[0033] The steel truss 3 is mounted on the base and has positioning scale lines and positioning holes 8. The elastic protective element 19 is fitted onto the edge of the base.

[0034] Corner seal 20 (preferably an L-shaped corner seal) is fitted into the corner of the base.

[0035] The guide connector is located between the steel truss 3 and the steel beam connection end. One end is fixed to the steel truss 3, and the other end is used to fit against the surface of the steel beam connection end.

[0036] The splicing components are located at the front and rear ends of the base and are used for splicing adjacent construction devices.

[0037] like Figure 6-7 As shown, in this invention, the base preferably includes a base plate 1 and a bottom mold 2, which are assembled to form the base. Positioning posts 22 are spaced apart along the length of the lower surface of the base plate 1. The bottom mold 2 has corresponding mounting grooves 23 that fit the positioning posts 22. The diameter of the positioning posts 22 is 0.5–1 mm smaller than the mounting grooves 23. After the positioning posts 22 are inserted into the mounting grooves 23, a clearance fit is formed, and the base plate 1 is fixed using fasteners (e.g., fasteners are symmetrically distributed along the length of the base plate 1 at 350 mm intervals and on both sides in the width direction; the fasteners are preferably metal angle brackets and countersunk bolts; the bolt diameter is preferably 7 mm; after fixing, the head of the countersunk bolt is flush with the surface of the base plate 1 or the bottom mold 2; simultaneously, a 2.5 mm thick and 18 mm wide nitrile rubber annular sealing gasket is laid at the edge between the base plate and the bottom mold, and fixed by adhesive tape to seal the gap). This achieves the pre-positioning of the base plate 1 and the bottom mold 2, with the base plate 1 positioned above the bottom mold 2. In this invention, the height of the positioning post is preferably 10-15mm, the spacing between adjacent positioning posts 22 is 400-500mm, and the positioning post 22 and the base plate 1 are integrally stamped and formed.

[0038] This invention's no-removal bottom formwork design reduces the formwork disassembly process, eliminates the need for traditional formwork removal, reduces timber / steel consumption, and lowers carbon emissions. The positioning column 22 and the mounting groove 23 work together to achieve rapid pre-positioning, and the annular sealing gasket and bolts are fixed together to form an integrated "pre-positioning-sealing-load-bearing" structure, significantly reducing grout leakage. The pre-positioning structure formed by the positioning column 22 and the mounting groove 23 simplifies the installation process and reduces installation errors.

[0039] In this invention, such as Figure 1 , 5As shown, the rope positioning groove 6 is preferably located on the side of the bottom mold 2 and the bottom plate 1. Preferably, limiting blocks 7 are evenly distributed within the rope positioning groove 6, with the limiting blocks 7 arranged in a stepped manner on the inner surface of the rope positioning groove 6. The distance between adjacent limiting blocks 7 is 100-150mm, used to limit the position of the lifting rope to prevent rope displacement during lifting. More preferably, the rope positioning groove 6 has a U-shaped structure, with a groove width preferably 20-25mm and a groove depth preferably 10-15mm, providing dedicated placement space for the lifting rope, preventing the rope from sliding randomly during lifting due to the lack of a fixed path, ensuring uniform distribution of lifting force, and the groove dimensions matching the specifications of conventional lifting ropes, making it compatible with ropes of different diameters and improving the versatility of the lifting device. The limiting block 7 is made of rubber and protrudes from the inner surface of the rope positioning groove 6. Preferably, the protrusion height is 5-8 mm. The limiting block 7 has a trapezoidal cross-section, and the side facing the rope insertion direction is an inclined surface, forming a guide ramp. This facilitates the quick and smooth sliding of the hoisting rope into the positioning groove, reducing manual operation difficulty and improving hoisting preparation efficiency. The other side is a vertical surface, forming a "guide-block" combination structure with the inclined surface. When the rope tends to shift due to hoisting force or swaying, the vertical surface provides rigid blocking, ensuring the rope remains within the positioning groove and avoiding the risk of slippage. The limiting block 7 physically restricts the lateral movement of the rope, preventing it from slipping out of the rope positioning groove 6 during hoisting and improving hoisting safety. The rubber material is elastic, cushioning the rigid contact between the rope and the groove, reducing rope wear and groove damage, and extending the service life of the device.

[0040] like Figure 2 As shown, in this invention, the steel truss 3 includes: Horseshoe-shaped reinforcing bars 9 are installed on the base. For example, horseshoe-shaped reinforcing bars 9 are installed on the upper surface of the base plate 1.

[0041] The web reinforcement 10 is connected to the horseshoe reinforcement.

[0042] The top chord reinforcement 11 is connected to the web reinforcement.

[0043] like Figure 2 As shown, in this invention, the upper end of the web reinforcement 10 is provided with a connecting block 12, and a fixing pin 13 is welded on the connecting block 12. The lower end of the upper chord reinforcement 11 is provided with a welding point adapted to the fixing pin 13, and the fixing pin 13 is welded and fixed to the welding point.

[0044] The horseshoe-shaped steel bars 9, web steel bars 10, and top chord steel bars 11 are preferably welded to form a triangular stable structure and fixed to the upper surface of the base plate 1 (welding point spacing 300mm). The axis of the steel truss 3 is preferably parallel to the length direction of the base plate 1 (error ≤2mm), which improves the overall shear resistance, meets the load-bearing requirements of high-rise buildings, and enhances the load-bearing stability.

[0045] In this invention, the splicing component includes: Mounting holes 14 are provided at the front and rear ends of the base.

[0046] The upper hanging rod 15 and the lower hanging rod 17 are respectively disposed in the mounting holes 14 at the front and rear ends of the base, and both protrude from the mounting holes 14. When two adjacent bases (base plates 1) are spliced ​​together, the upper hanging rod 15 and the lower hanging rod 17 are spliced ​​and fixed accordingly. Specifically: like Figure 3-4 As shown, the upper hanging rod 15 has a slot 16 at its front end, and the lower hanging rod 17 has an insert 18 at its front end that fits the slot 16. The insert 18 is inserted into the slot 16 and then locked in place by bolts (such as 10mm diameter bolts). The fit of the insert and slot, along with the bolt locking, and the filling space reinforce the overall integrity with concrete. When the two base plates 1 are joined, the filling space formed between the mounting holes 14 accommodates the cast-in-place concrete to enhance the joint strength.

[0047] In this invention, alignment grooves 4 are formed at the four corner edges of the base, and reflective lenses 5 are installed within the alignment grooves 4. The alignment of the base pieces is determined by irradiating the reflective lenses 5 with a laser. The alignment groove 4 is preferably U-shaped, with a groove opening side length of 30-40mm and a groove depth of 5-8mm. The reflective lenses 5 are made of tempered glass and are embedded in the alignment grooves 4 with waterproof adhesive. The surface of the reflective lenses 5 is flush with the groove opening of the alignment groove 4, and the center of the reflective lenses 5 coincides with the right-angle vertex of the alignment groove 4. The alignment error of multiple base plates 1 is detected by the overlap of the reflected light spots after laser irradiation, ensuring the splicing accuracy.

[0048] In this invention, the elastic protective component 19 is made of high-strength rubber and has an internal honeycomb-shaped buffer structure. The honeycomb structure is used to buffer impact forces, reduce the risk of edge damage, and reduce the edge damage rate from 8% to below 2%. The elastic protective component 19 is preferably detachably connected to the base plate 1 via buckles 21. The elastic protective component 19 is preferably a reusable elastic protective component, with a length consistent with the edge length of the base plate 1, and a thickness preferably of 10-15 mm. The honeycomb-shaped buffer structure has a honeycomb aperture of 5-8 mm, and the buckles 21 are spaced 200-300 mm apart along the length of the elastic protective component 19.

[0049] In this invention, the corner seal 20 is preferably made of rubber, and its inner side is provided with a groove that fits the corner of the base plate 1. The corner seal 20 and the aforementioned annular sealing gasket form a double anti-leakage structure, reducing repair costs.

[0050] The elastic protective component 19 and the corner seal 20 can be disassembled, cleaned, and reused, reducing the consumption of disposable materials, reducing construction waste, and conforming to the concept of low-carbon construction.

[0051] In this invention, the guide connector is an arc-shaped metal sheet with serrations, the serration structure enhancing friction. One end is welded to the preferred steel truss 3, and the other end is attached to the connection end of the steel beam.

[0052] In this invention, the accuracy of the positioning scale lines on the surface of the upper chord reinforcing bar 11 is preferably 1 mm, and the positioning holes 8 are spaced apart along the length of the upper chord reinforcing bar 11. The diameter of the positioning holes 8 is 8-10 mm, the distance between adjacent positioning holes 8 is 500 mm, and the axis of the positioning holes 8 is perpendicular to the axis of the upper chord reinforcing bar 11, which can be used with a laser positioning device to achieve installation positioning. The positioning scale lines on the surface of the upper chord reinforcing bar 11, together with the positioning holes 8 and the laser positioning device, allow for fine adjustment by the scale lines after the positioning rod is inserted into the positioning holes 8, replacing manual string positioning, and reducing the error from more than 5 mm in the traditional method to within 3 mm.

[0053] In summary, the present invention has the following advantages: Steel truss: welded and fixed to form a rigid whole, improving load-bearing stability; Base plate and bottom formwork: Pre-positioning of positioning columns simplifies installation, and annular sealing gaskets reduce grout leakage; Full-process protection components: Recyclable elastic protective parts and L-shaped seals provide dual protection against breakage and leakage, and are low-carbon and reusable; Integrated positioning components: The positioning holes work in conjunction with the laser positioning device to achieve high-precision installation, and the guide connectors improve the fit with the steel beam and the shear resistance. Splicing and hoisting structure: slot-insert splicing enhances robustness, rope positioning grooves and limit blocks ensure hoisting stability, and alignment grooves detect splicing alignment accuracy; Overall coordination: The integrated design combines hoisting, protection, and positioning functions, reducing process losses and achieving full-process carbon control.

[0054] The construction process of this invention is as follows: Transportation and hoisting The hoisting ropes are placed along the rope positioning grooves 6 of the bottom mold 2 and the bottom plate 1. The position of the ropes is fixed by the stepped limiting blocks 7 (inclined surface guide, vertical surface limit) to prevent displacement. During the hoisting process, the honeycomb structure of the elastic protective component 19 buffers the impact force and reduces the risk of damage to the plate edge.

[0055] On-site positioning and splicing Positioning of steel truss 3: The position is adjusted by using the positioning hole 8 of the upper chord steel bar 11 in conjunction with a laser positioning instrument (positioning rod inserted into the positioning hole) and the positioning scale line to ensure that the installation error is ≤3mm.

[0056] Multiple base plates 1 splicing: Insert the insert 18 of the lower hanging rod 17 of the adjacent base plates 1 into the slot 16 of the upper hanging rod 15 and lock it with bolts (10mm in diameter). A filling space is formed between the mounting holes 14. At the same time, use a laser pointer to illuminate the reflective lens 5 of the correction slot 4 at the four corners. If the reflected light spots overlap, it indicates that the splicing is aligned. Otherwise, make fine adjustments to align.

[0057] Connected to steel beams The guide connector (arc-shaped metal piece with serrations) of the steel truss 3 is attached to the connection end of the steel beam (steel beam flange plate) and fixed by arc welding. After welding, the fit is tested to be ≥95%.

[0058] Concrete pouring and protective component recycling Pouring process: The corner seal 20 and the annular sealing gasket form a double leak-proof grout structure.

[0059] Recycling of protective components: After the concrete has initially set, remove the elastic protective component 19 and the corner seal 20 (they can be reused after cleaning) to complete the construction.

[0060] The above description is merely a preferred embodiment of the present invention. However, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention should be covered within the scope of protection of the present invention.

Claims

1. A hoisting, protective, and positioning integrated construction device for steel truss floor slabs without the need for dismantling the bottom formwork, characterized in that, include: The base has rope positioning grooves for hoisting; A steel truss is mounted on the base, and is provided with positioning scale lines and positioning holes; An elastic protective element is fitted onto the edge of the base; Corner seals are fitted into the corners of the base; A guide connector is located between the steel truss and the steel beam connection end, with one end fixed to the steel truss and the other end used to fit against the surface of the steel beam connection end; The splicing components are located at the front and rear ends of the base and are used for splicing adjacent construction devices.

2. The integrated hoisting, protection, and positioning device for non-removable bottom formwork steel truss floor slab construction according to claim 1, characterized in that, The steel truss includes: Horseshoe-shaped steel bars are installed on the base; The web reinforcement is connected to the horseshoe-shaped reinforcement; The top chord reinforcement is connected to the web reinforcement.

3. The integrated hoisting, protection, and positioning device for non-removable bottom formwork steel truss floor slab construction according to claim 2, characterized in that, The upper end of the web reinforcement is provided with a connecting block, and a fixing pin is welded to the connecting block. The lower end of the upper chord reinforcement is provided with a welding point that matches the fixing pin, and the fixing pin is welded to the welding point for fixation.

4. The integrated hoisting, protection, and positioning device for steel truss floor slab construction without dismantling the bottom formwork, as described in claim 1, is characterized in that... The splicing components include: Mounting holes are provided at the front and rear ends of the base; The upper and lower hanging rods are respectively installed in the mounting holes at the front and rear ends of the base, and both protrude from the mounting holes; The upper hanging rod has a slot at its front end, and the lower hanging rod has a insert at its front end that fits the slot. The insert is then inserted into the slot and locked in place by bolts.

5. The integrated hoisting, protection, and positioning device for steel truss floor slab construction without dismantling the bottom formwork, as described in claim 1, is characterized in that... The base has alignment grooves at its four corners, and reflective lenses are installed in the alignment grooves. The alignment of the base is determined by illuminating the reflective lenses with a laser.

6. The integrated hoisting, protection, and positioning device for non-removable bottom formwork steel truss floor slab construction according to claim 5, characterized in that, The correction groove is a U-shaped groove, and the reflective lens is made of tempered glass and is embedded in the correction groove with waterproof adhesive.

7. The integrated hoisting, protection, and positioning device for steel truss floor slab construction without dismantling the bottom formwork, as described in claim 1, is characterized in that... Limiting blocks are evenly arranged in the rope positioning groove. The limiting blocks are distributed in a stepped manner on the inner surface of the rope positioning groove. The distance between adjacent limiting blocks is 100-150mm, which is used to limit the position of the hoisting rope to prevent the rope from shifting during hoisting.

8. The integrated hoisting, protection, and positioning device for steel truss floor slab construction without dismantling the bottom formwork, as described in claim 7, is characterized in that... The rope positioning groove has a U-shaped structure, and the limiting block is made of rubber, protruding from the inner surface of the rope positioning groove. The cross-section of the limiting block is trapezoidal, and the side of the limiting block facing the rope insertion direction is an inclined surface, while the other side is a vertical surface.

9. The integrated hoisting, protection, and positioning device for non-removable bottom formwork steel truss floor slab construction according to claim 1, characterized in that, The elastic protective component is made of high-strength rubber and has a honeycomb-shaped buffer structure inside.

10. A hoisting, protective, and positioning integrated non-removable bottom formwork steel truss floor slab construction device according to any one of claims 1-9, characterized in that, The guide connector is a serrated arc-shaped metal sheet.

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