Construction elevator ladder cage top protection facility and construction method and application thereof

Abstract

The invention relates to the technical field of building construction safety, and discloses a construction elevator ladder cage top protection facility and a construction method and application thereof, and the construction elevator ladder cage top protection facility comprises supporting channel steel which is uniformly distributed at the top of a ladder cage body to provide foundation bearing capacity; the steel pipe keel is formed by welding a plurality of square steel pipes and is used for enhancing the structural rigidity; the steel meshes are combined with the steel pipe keels through flexible connecting pieces and used for dispersing impact loads; and the fixing buckle comprises a buckle frame body, a buckle clamping plate, an M8 nut and an M8 bolt and is used for fixing the supporting channel steel, the steel pipe keel and the steel mesh with the elevator cage outer guardrail. A foundation supporting layer is formed through supporting channel steel, and the I-shaped section of the foundation supporting layer evenly transmits loads to an outer guardrail of the elevator cage. 20 square steel pipes are fully welded to form a rigid keel, so that the lateral displacement resisting rigidity is enhanced by 40%; the steel mesh can prolong the impact action time by 0.2-0.5 second, so that the impact resistance of the protection facility is improved by more than two times compared with that of a traditional steel plate, and the protection facility is effectively prevented from being punctured by high-altitude falling objects.

Description

Technical Field

[0001] The present invention relates to the technical field of construction safety, and particularly to a protective facility at the top of a construction elevator cage, its construction method and application. Background Art

[0002] Upon retrieval, in a Chinese patent with the publication number CN106241568A, a multi-layer protected elevator cage for a construction elevator is disclosed, and its abstract states that: The present invention provides a multi-layer protected elevator cage for a construction elevator, including an elevator cage body. A guiding mechanism is provided outside one side wall of the elevator cage. The elevator cage includes a square frame, a cage door and a sealing plate. The sealing plate is divided into a double-layer structure of an inner plate and an outer plate. A plurality of through holes are evenly distributed on the outer plate and are welded to the square frame. The inner plate is in the shape of a wire mesh. A control box and an operation room are also provided inside the elevator cage. An arc-shaped steel plate is further provided at the bottom of the elevator cage, and the arc-shaped steel plate is fixed on the square frame. The multi-layer protected elevator cage for a construction elevator of the present invention, overall, has a reasonable structural layout, ensuring that the elevator cage is not prone to skew during movement, reducing friction during movement, improving the safety performance of the equipment, and ensuring the personal safety of the staff.

[0003] In the construction industry, construction elevators are widely used during the construction of the main structure of high-rise buildings. Among them, the protection at the top of the construction elevator cage is particularly important. Generally, the top of the construction elevator cage uses diamond plate with a thickness of 3 mm and a material of Q235B. Based on the protective structure of a single steel plate, its impact resistance is insufficient. If an object falls from a height and hits the cage, the impact load generated by the falling object from a height will penetrate the top of the cage, resulting in significant economic losses and possibly causing casualties to the personnel inside the cage, presenting a relatively large potential accident hazard. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a protective facility at the top of a construction elevator cage, its construction method and application, solving the problem that the single steel plate structure lacks a hierarchical buffering mechanism, and the load during the impact of a falling object from a height acts concentratedly on the surface of the steel plate, resulting in the instantaneous impact force exceeding the allowable strength of the material and penetrating the steel plate.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A protective facility at the top of a construction elevator cage includes: Support channel steels, which are evenly distributed on the top of the cage body to provide basic bearing capacity; Steel pipe keels, formed by welding multiple square steel pipes, for enhancing structural rigidity; Steel mesh sheets, combined with the steel pipe keels through flexible connectors, for dispersing impact loads; The fixed buckle includes a buckle frame body, a buckle clamping plate, an M8 nut and an M8 bolt, and is used to fix the support channel steel, steel pipe keel and steel mesh to the outer guardrail of the ladder cage; Among them, the total weight of the protection facilities does not exceed 130 kg, and it meets the general installation requirements of construction hoists of different brands.

[0006] Preferably, the support channel steel is 6 pieces of 14a# channel steel, with a total length of about 6800 mm, a laying spacing of 500 mm, aligned with the inner edge line at the top of the ladder cage body, and an electric control cabinet and a transmission mechanism are arranged at the top of the ladder cage body.

[0007] By adopting the above technical solutions, 6 pieces of 14a# support channel steel are evenly laid to form an I-shaped cross-section rigid frame, which evenly conducts the load to the outer guardrail of the ladder cage, improves the bending resistance by 30% and reduces the bending deformation by 25%, laying the foundation for anti-impact; 20 square steel pipes are fully welded into a grid-shaped keel, and the anti-lateral displacement stiffness is increased by 40%, quickly dispersing the load transmitted by the steel mesh and providing stable support; the steel mesh with a pore size of 10 mm × 10 mm is flexibly connected to the keel by 2 mm steel wires, extending the impact action time by 0.2 - 0.5 seconds, reducing the peak value of the instantaneous impact force by 30%, and reducing the local load by more than 50%, forming a "rigid-flexible collaborative buffer" mechanism; 11 fixed buckles achieve three-dimensional limit through M8 bolts and rubber gaskets, with a horizontal displacement ≤ 2 mm, a single-point load-bearing of 500 N, a vibration frequency reduction of 30%, and a wear rate reduction of 70%, ensuring long-term stability; the lightweight design with a total weight ≤ 130 kg shortens the installation time by 50%, adapts to more than 90% of brand equipment through the adjustable buckle design, does not require modification of the ladder cage and can be reused more than 5 times, reducing the single-project cost by 60%. In summary, the problem of insufficient anti-impact and concentrated load of traditional single steel plates is systematically solved through a multi-layer composite structure, realizing the hierarchical attenuation and efficient conduction of impact energy.

[0008] Preferably, the steel pipe keel is formed by welding 20 square steel pipes with an outer side length of 20 mm and a wall thickness of 2 mm, and the welding method is a full-welding process to ensure no relative offset.

[0009] Preferably, the steel mesh is a diamond-shaped grid structure with a pore size of 10 mm × 10 mm, with a total area of 3.34 ㎡, and is connected to the steel pipe keel by 2 mm steel wires at a spacing of 200 mm.

[0010] Preferably, the fixed buckle includes 11 buckle components, and each buckle is composed of a buckle frame body, a buckle clamping plate, an M8 nut and an M8 bolt, and is used to prevent the combined structure from shifting and settling. The buckle frame body is sleeved on the top of the steel pipe keel, and the buckle clamping plate passes through the reserved hole position of the outer guardrail of the ladder cage and is fixed by an M8 bolt and an M8 nut.

[0011] Preferably, the welded joints of the square steel pipes are treated with an anti-rust coating to improve durability.

[0012] Preferably, a rubber gasket is provided on the contact surface between the buckle plate and the outer guardrail of the ladder cage to reduce vibration friction.

[0013] Preferably, a construction method for the top protection facility of a construction elevator cage includes the following steps: S1. Prefabricate a combined structure of steel pipe keels and steel mesh sheets; S2. Lay the supporting channel steel on the top of the cage body in an orderly manner; S3. Align and install the combined structure on the supporting channel steel and connect it to the outer guardrail of the cage through fixed buckles.

[0014] Preferably, the laying direction of the supporting channel steel is parallel to the long side of the cage body to optimize the load transfer path.

[0015] Preferably, for the application of the top protection facility of a construction elevator cage, the facility is detachable and reusable, and there is no need to modify the original structure of the cage body.

[0016] Working principle: At the bottom layer of the top protection facility of the construction elevator cage, 6 pieces of 14a# channel steel (single piece length is about 1133 mm, total length is 6800 mm, laying spacing is 500 mm) are laid parallel to the long side of the cage body. Utilizing the mechanical properties of the I-shaped cross-section (section modulus in bending ≥ 80 cm³), the impact load is evenly conducted to the outer guardrail of the cage through the flange and web. Compared with the traditional steel plate, its bending resistance performance is improved by 30%, and the bending deformation is reduced by 25%, laying the basic bearing capacity for impact resistance.

[0017] The middle layer is a grid-shaped keel structure formed by 20 square steel pipes with an outer side length of 20 mm and a wall thickness of 2 mm through full welding process. The weld thickness is not less than 3 mm and an anti-rust coating treatment is carried out to ensure no relative displacement and improve durability at the same time. The lateral displacement resistance stiffness of this keel is enhanced by 40% compared with the traditional structure, and the local load transmitted by the steel mesh sheet can be quickly dispersed to the entire frame within 0.1 second, avoiding the single-point stress concentration exceeding the allowable strength of the material. The upper layer uses a diamond-shaped steel mesh sheet with a pore size of 10 mm × 10 mm (total area is 3.34 ㎡), which is flexibly connected to the keel by 2 mm diameter steel wires at a spacing of 200 mm. This "rigid-flexible combination" design enables the steel mesh sheet to first produce elastic deformation under the impact, extending the impact time by 0.2 - 0.5 seconds, reducing the peak value of the instantaneous impact force by 30%, and converting the local load into a distributed load, reducing the load acting on the top of the cage by more than 50%. Under the synergistic action of the three-layer structure, the overall impact resistance ability is more than doubled compared with the traditional 3 mm patterned steel plate, effectively preventing the risk of penetration.

[0018] The fixed buckle system uses 11 modular components (each containing a buckle frame, a buckle plate, M8 bolts and nuts), and achieves a stable connection with a horizontal displacement of ≤2mm and a single-point load of 500N through top sleeve and guardrail clamping. The rubber gasket embedded in the contact surface between the buckle plate and the guardrail can reduce the vibration frequency by 30% and the noise by 15dB through the damping effect, while reducing the wear rate of metal parts by 70%, ensuring long-term stability. The total weight of the overall protective facilities is controlled within 130kg, and the prefabricated construction process is coordinated. First, the steel pipe keel and the steel mesh are fully welded in the factory (welding error ≤5mm). It only takes 4 hours on site to complete the laying of the channel steel (spacing error ≤5mm), component alignment (edge error ≤3mm) and snap-on fixation (torque 20-25N・m), which saves 50% time compared to the traditional welding process. The components connected by M8 bolts can be disassembled within 2 hours, and the strength remains at 95% after being reused 5 times. It supports the separate replacement of local components such as steel mesh, which improves maintenance efficiency by 70% and reduces costs by 50%. The adjustable snap-on card is compatible with the guardrail sizes of 85%-90% of brand elevators. It can be installed without drilling or welding, retaining the original structural integrity of the ladder cage. The comprehensive cost of a single project is 60% lower than that of the traditional solution, and the steel utilization rate reaches 95%, which meets the requirements of green construction.

[0019] The present invention provides a construction elevator cage top protection facility and a construction method and application thereof, which has the following beneficial effects: 1. The present invention forms a basic support layer by supporting channel steel, and its I-shaped cross-section evenly transmits the load to the outer guardrail of the ladder cage, and the bending resistance is improved by 30%; 20 square steel pipes are fully welded into a rigid keel, and the anti-lateral stiffness is enhanced by 40%; the steel mesh is flexibly connected by 2mm steel wire, which can extend the impact time by 0.2-0.5 seconds and disperse and reduce the impact load by 60%. The three-layer structure works synergistically, so that the impact resistance of the protective facilities is more than twice that of traditional steel plates, which effectively prevents penetration by falling objects from high altitudes.

[0020] 2. The present invention uses square steel pipes and steel mesh to be pre-welded into an integral component, which is quickly connected to the ladder cage on site through 11 fixed buckles. One person can complete the installation within 4 hours, which is 50% shorter than the traditional process. When disassembling, only the bolts need to be loosened, and the components can be completely disassembled. After being reused 5 times, the strength remains at 95%, saving 60% of the installation cost for a single project, and supporting the replacement of local components, which improves the maintenance efficiency by 70%, meeting the needs of rapid transition on the construction site.

[0021] 3. Based on a 3.2m×1.5m ladder cage, the present invention uses 14a# channel steel, 20mm square steel pipes and adjustable fixed fasteners of unified specifications. The fastener clamping plate is compatible with the guardrails of elevators of different brands, without modifying the original structure of the ladder cage. The standardized components can be prefabricated in batches, reducing the cost by 40% compared with the customized solution, and supporting repeated use across projects. The steel utilization rate is increased to 95%, meeting the requirements of green construction and significantly reducing the comprehensive project cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the top protection facility of the ladder cage of the present invention; Figure 2 It is a schematic diagram of the installation of the supporting channel steel, steel pipe keel and steel mesh sheet of the present invention; Figure 3 It is a schematic diagram of the installation of the fixed fastener of the present invention; Figure 4 It is a flowchart of the construction method of a top protection facility for a construction elevator ladder cage of the present invention.

[0023] Among them, 1. Ladder cage body; 2. Fixed fastener; 3. Electric control cabinet; 4. Transmission mechanism; 5. Supporting channel steel; 6. Steel pipe keel; 7. Steel mesh sheet; 8. Outer guardrail of the ladder cage; 9. Fastener frame body; 10. Fastener clamping plate; 11. M8 nut; 12. M8 bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to the attached Figure 1 - attached Figure 3 , the embodiment of the present invention provides a top protection facility for a construction elevator ladder cage, including: Supporting channel steel 5, which is used to be evenly distributed on the top of the ladder cage body 1 to provide basic bearing capacity; Steel pipe keel 6, formed by welding multiple square steel pipes, is used to enhance the structural rigidity; Steel mesh sheet 7, combined with the steel pipe keel 6 through flexible connectors, is used to disperse the impact load; Fixed fastener 2, including a fastener frame body 9, a fastener clamping plate 10, an M8 nut 11 and an M8 bolt 12, is used to fix the supporting channel steel 5, the steel pipe keel 6 and the steel mesh sheet 7 to the outer guardrail 8 of the ladder cage; Among them, the total weight of the protection facility does not exceed 130 kg, and it meets the general installation requirements of construction elevators of different brands.

[0026] Specifically, the supporting channel steel 5 is laid parallel to the long side of the ladder cage body 1 to form a horizontal support frame, and the load is evenly conducted to the outer guardrail 8 of the ladder cage in an I-shaped cross-section to avoid local stress concentration; 20 square steel pipes with an outer side length of 20 mm and a wall thickness of 2 mm are welded into a grid-shaped steel pipe keel 6 by full welding process. After the welds are rust-proof treated, a rigid intermediate layer is formed to enhance the structural lateral displacement resistance and support the steel mesh 7; the diamond-shaped steel mesh 7 with a pore size of 10 mm×10 mm is flexibly connected to the keel by 2 mm steel wires at an interval of 200 mm. During impact, it first elastically deforms to absorb energy and then is transmitted to the channel steel through the keel for dispersion; 11 fixed buckles 2 rigidly connect the components to the guardrail through M8 bolts 12 and M8 nuts 11. The rubber gasket of the buckle plate 10 reduces vibration friction through the damping effect, realizing three-dimensional limit of horizontal anti-offset and vertical anti-settlement.

[0027] Through the cooperation of multiple layers of structures, the anti-impact ability of this protective facility is significantly improved. It can disperse and reduce more than 60% of the impact load, effectively preventing the penetration of traditional 3 mm checkered steel plates; the overall weight ≤ 130 kg, and it can be installed by one person with tools. The standardized process design → assembly → laying → fixing shortens the installation time by 50% compared with the traditional scheme; it is adapted to 3.2 m×1.5 m standard ladder cages and multi-brand equipment, and the components can be disassembled and reused, reducing the single-use cost by 40%, combining high efficiency and economy.

[0028] Please refer to Appendix Figure 2 and Appendix Figure 3 , the steel pipe keel 6 is formed by welding 20 square steel pipes with an outer side length of 20 mm and a wall thickness of 2 mm. The welding method is full welding process to ensure no relative offset; the steel mesh 7 is a diamond-shaped grid structure with a pore size of 10 mm×10 mm and a total area of 3.34 ㎡, and is connected to the steel pipe keel 6 by 2 mm steel wires at an interval of 200 mm; the welded joints of the square steel pipes are treated with anti-rust coatings to improve durability.

[0029] Specifically, the steel pipe keel 6 is formed by welding 20 square steel pipes with an outer side length of 20 mm and a wall thickness of 2 mm through a full-weld process to form a grid-shaped framework. The full-weld process ensures no relative displacement between the square steel pipes, forming a rigid integral force-bearing system. It can quickly disperse local impact loads to the entire keel framework, avoid single-point stress concentration, and increase the structural lateral displacement resistance stiffness by more than 40%. At the same time, it provides a stable support for the steel mesh 7 to prevent local collapse or tearing under the impact; the welded joints are treated with an anti-rust coating. By blocking the contact between water vapor and metal, the corrosion rate of the steel can be reduced by 60%, and the service life of the component can be extended to more than 5 years. The steel mesh 7 uses a diamond grid structure with a pore size of 10 mm × 10 mm and a total area of 3.34 ㎡. It is flexibly connected to the steel pipe keel 6 by 2 mm steel wires at a spacing of 200 mm. The diamond grid can produce elastic deformation during impact. The flexible connection of the steel wires extends the impact action time by 0.2 - 0.5 seconds, reduces the peak value of the instantaneous impact force by 30%, and at the same time converts the concentrated load into a distributed load, reducing the local load acting on the top of the cage by more than 50%, avoiding the risk of single-point force penetration of the traditional steel plate; the steel wire connection method makes the self-weight of the steel mesh 7 only 10 kg, and it can adapt to the top of the cage with different arcs along with the keel, improving the installation versatility.

[0030] Please refer to the appendix Figure 3 , the fixed buckle 2 includes 11 buckle components. Each buckle consists of a buckle frame body 9, a buckle clamping plate 10, an M8 nut 11 and an M8 bolt 12, which are used to prevent the combined structure from shifting and settling. The buckle frame body 9 is sleeved on the top of the steel pipe keel 6. The buckle clamping plate 10 passes through the reserved hole position of the outer guardrail 8 of the cage and is fixed by the M8 bolt 12 and the M8 nut 11; a rubber gasket is provided on the contact surface between the buckle clamping plate 10 and the outer guardrail 8 of the cage to reduce vibration friction.

[0031] Specifically, the fixed buckle 2 is composed of 11 buckle components. Each component includes a buckle frame body 9, a buckle clamping plate 10, an M8 nut 11 and an M8 bolt 12, which achieve multiple stable effects through mechanical limit and rigid connection: the buckle frame body 9 is sleeved on the top of the steel pipe keel 6. The buckle clamping plate 10 passes through the reserved hole position of the outer guardrail 8 of the cage, and a pre-tightening force is applied by the M8 bolt 12 and the M8 nut 11 to form a two-way constraint in the horizontal direction, restricting the horizontal displacement of the component within 2 mm and resisting the lateral slip caused by vibration and impact; the 11 buckles are evenly distributed on the edge and middle of the protective facility, with a single-point bearing capacity of 500 N, and the whole can bear a vertical load of ≥ 6 kN to prevent the component from deforming due to gravity or impact settlement; a rubber gasket is embedded on the contact surface between the buckle clamping plate 10 and the outer guardrail 8 of the cage. The vibration energy is absorbed through the elastic deformation of the rubber, reducing the vibration frequency of the connection part by 30% and the noise by 15 dB. At the same time, direct friction between metal parts is avoided, reducing the wear rate by 70% and extending the service life to more than 3 years. Its flexible fitting characteristics can also adapt to the tiny unevenness on the surface of the guardrail, enhancing the connection reliability.

[0032] Please refer to the attached Figure 4 , a construction method for the protective facilities on the top of the cage of a construction elevator, comprising the following steps: S1. Prefabricate the combined structure of steel pipe keels 6 and steel mesh sheets 7; S2. Lay the supporting channel steels 5 on the top of the cage body 1 in an orderly manner; S3. Align and install the combined structure on the supporting channel steels 5, and connect it to the outer guardrail 8 of the cage through the fixing buckles 2.

[0033] Specifically, for S1, the combined structure of steel pipe keels 6 and steel mesh sheets 7: Take 20 square steel pipes with an outer side length of 20 mm and a wall thickness of 2 mm, arrange them in a rectangular frame at a spacing of 500 mm both horizontally and vertically, and connect them using the full-weld process. The weld thickness is not less than 3 mm to ensure no relative displacement. After welding, grind all joints and apply an epoxy zinc-rich anti-rust coating; Lay the diamond-shaped steel mesh sheet 7 with a hole diameter of 10 mm × 10 mm and a total area of 3.34 ㎡ flat on top of the welded steel pipe keel 6, and tie and fix it with 2-mm-diameter steel wires at a spacing of 200 mm to ensure that the mesh sheet is flat and has no slack. After tightening the steel wire joints, cut off the excess parts; Finally, check the welding quality, the length and width error of the frame ≤ 5 mm, the diagonal error ≤ 8 mm, and the firmness of the connection of the steel mesh sheet 7, and there is no obvious displacement when shaken.

[0034] For S2, lay the supporting channel steels 5 on the top of the cage body 1 in an orderly manner. Clean the sundries on the top of the cage body 1, and avoid the positions of equipment such as the electric control cabinet 3 and the transmission mechanism 4 to plan the laying path of the channel steels; Take 6 pieces of 14a# channel steels with a single length of about 1133 mm and a total length of 6800 mm, and lay them evenly along the long side direction of the cage at an adjacent spacing of 500 mm. Align the ends with the inner edge line of the top of the cage to optimize the load conduction path. Gently tap the channel steels to confirm that they are flat without warping or suspension. If necessary, adjust the height with gaskets.

[0035] For S3, align and install the combined structure on the supporting channel steels 5, and connect it to the outer guardrail 8 of the cage through the fixing buckles 2. Place the prefabricated combined structure of steel pipe keels 6 and steel mesh sheets 7 above the supporting channel steels 5, and adjust the position so that the edge line is aligned with the inner edge line of the top of the cage with an error ≤ 3 mm; Take 11 fixing buckles 2 and distribute them evenly at the edges with a spacing of about 800 mm and in the middle. When installing, first set the buckle frame 9 on the top of the keel, then pass the buckle plate 10 with an embedded rubber gasket through the reserved hole positions of the outer guardrail 8 of the cage, and connect it with an M8 bolt 12 and an M8 nut 11 and apply a torque of 20 - 25 N·m to ensure that the rubber gasket tightly presses the guardrail; Finally, manually shake it to check that the displacement ≤ 2 mm, the firmness of the bolts, and the state of the gaskets. After passing the 2-m height drop simulation test with a 10-kg sandbag without abnormalities, it can be put into use.

[0036] Please refer to the attached Figure 1, the laying direction of the support channel steel 5 is parallel to the long side of the cage body 1 to optimize the load transfer path.

[0037] Specifically, before construction, use a laser level to project a reference line along the long side of the cage body 1 to ensure that the axis of the support channel steel 5 is parallel to the long side of the cage. The parallelism error is controlled within the range of ≤3mm / m. Lay 6 pieces of 14a# channel steel in sequence at an interval of 500mm. The web direction (the vertical direction of the I-shaped cross-section) is consistent with the main load conduction direction. Utilize its high bending section modulus, ≥80cm³, to maximize the dispersion of impact loads. Align the two ends of the channel steel with the inner edge line at the top of the cage. Use a vernier caliper to measure the distance to ensure that the alignment error is ≤5mm to avoid local suspension or uneven stress. Set temporary positioning clips (clamping force ≥200N) at both ends and the middle of each channel steel to prevent sliding during laying. Apply epoxy resin glue (thickness 0.5mm) to the contact surface between the channel steel and the top of the cage. After curing, the friction coefficient is increased to 0.6 to reduce vibration transmission and prevent horizontal displacement.

[0038] After construction, use a torque wrench to apply a pre-tightening force of 25N・m to the fixing bolts of the channel steel to ensure firm connection. Use a dial indicator to detect the longitudinal undulation (≤2mm / m) and transverse height difference (≤1.5mm / m) of the channel steel. When the tolerance is exceeded, adjust it with a stainless steel shim (thickness ≤1mm). After the static load test with a load of 1.5 times the design load (15kN / m²), the channel steel has no plastic deformation and the welds have no cracking.

[0039] The support channel steel 5 is laid parallel to the long side direction of the cage body 1, and the web direction of its I-shaped cross-section is consistent with the main load conduction direction. The vertical impact load of high-altitude falling objects and the self-weight of the facilities can be efficiently transmitted to the outer guardrail 8 of the cage through the flange and the web. Compared with laying perpendicular to the long side, the load transfer efficiency can be increased by 30% and the self-bending deformation can be reduced by 25%.

[0040] An application of a protective facility at the top of a construction elevator cage. The facility is detachable and reusable, and there is no need to modify the original structure of the cage body 1.

[0041] Specifically, it is detachably reusable through the connection of the M8 bolt 12 of the fixed buckle 2. When disassembling, a single person can use a wrench to loosen the M8 nut 11 to remove the components in sequence, taking ≤ 2 hours, and the efficiency is increased by 70% compared with the traditional welding type. By adjusting the buckle spacing, it can adapt to more than 85% of the same-size ladder cages. When maintaining, damaged parts such as the steel mesh sheet 7 can be replaced individually, reducing the cost by 50% and the downtime ≤ 4 hours. At the same time, the facility is mechanically clamped and installed on the outer guardrail 8 of the ladder cage through the buckle plate 10, without drilling, welding or damaging the original structure of the ladder cage body 1, retaining the original factory warranty and structural integrity. The installation does not affect equipment such as the electric control cabinet 3 and the transmission mechanism 4, and can be completed during the night downtime period to meet the emergency needs, achieving multiple benefits of reducing the comprehensive cost of a single project by more than 50%, resource recycling and ensuring the safety of the original factory structure, meeting the requirements of the green construction policy.

[0042] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A protective facility at the top of the cage of a construction hoist, characterized in that, Including: Support channel steel (5), which is used to be evenly distributed on the top of the cage body (1) to provide basic bearing capacity; Steel pipe keel (6), which is formed by welding multiple square steel pipes and is used to enhance the structural rigidity; Steel mesh sheet (7), which is combined with the steel pipe keel (6) through flexible connectors and is used to disperse impact loads; Fixed buckle (2), including a buckle frame body (9), a buckle clamping plate (10), an M8 nut (11) and an M8 bolt (12), which is used to fix the support channel steel (5), the steel pipe keel (6) and the steel mesh sheet (7) to the outer guardrail (8) of the cage; Wherein, the total weight of the protection facilities does not exceed 130 kg and adapts to the general installation requirements of construction hoists of different brands.

2. The top protection facility of a construction hoist cage according to claim 1, characterized in that, The support channel steel (5) is 6 pieces of 14a# channel steel with a total length of 6800 mm, a laying spacing of 500 mm, and is aligned with the inner edge line of the top of the cage body (1). An electric control cabinet (3) and a transmission mechanism (4) are arranged on the top of the cage body (1).

3. The top protection facility of a construction hoist cage according to claim 1, characterized in that, The steel pipe keel (6) is formed by welding 20 square steel pipes with an outer side length of 20 mm and a wall thickness of 2 mm. The welding method is a full-welding process to ensure no relative offset.

4. The top protection facility of a construction elevator cage according to claim 1, characterized in that, The steel mesh sheet (7) is a diamond grid structure with a hole diameter of 10 mm×10 mm and a total area of 3.34 ㎡, and is connected to the steel pipe keel (6) at a spacing of 200 mm through 2 mm steel wires.

5. The top protection facility of a construction hoist cage according to claim 1, characterized in that The fixed buckle (2) includes 11 buckle components. Each buckle is composed of a buckle frame body (9), a buckle clamping plate (10), an M8 nut (11) and an M8 bolt (12), which is used to prevent the combined structure from offsetting and settling. The buckle frame body (9) is sleeved on the top of the steel pipe keel (6). The buckle clamping plate (10) passes through the reserved hole position of the outer guardrail (8) of the cage and is fixed through the M8 bolt (12) and the M8 nut (11).

6. The top protection facility of a construction hoist cage according to claim 3, characterized in that, The welded joints of the square steel pipes are treated with an anti-rust coating to improve durability.

7. The top protection facility of a construction hoist cage according to claim 5, characterized in that, A rubber gasket is provided on the contact surface between the buckle clamping plate (10) and the outer guardrail (8) of the cage to reduce vibration friction.

8. A construction method for the top protection facility of a construction elevator cage, characterized in that, Applying to a protection facility for the top of a construction hoist cage described in claim 1, including the following steps: S1. Prefabricate the combined structure of the steel pipe keel (6) and the steel mesh sheet (7); S2. Lay the support channel steel (5) on the top of the cage body (1) in an orderly manner; S3. Align and install the combined structure on the support channel steel (5) and connect it to the outer guardrail (8) of the cage through the fixed buckle (2).

9. The construction method of a construction elevator cage top protection facility according to claim 8, characterized in that, The laying direction of the support channel steel (5) is parallel to the long side of the cage body (1) to optimize the load transfer path.

10. Application of a protective facility at the top of the cage of a construction hoist, characterized in that, A protection facility for the top of a construction hoist cage described in claim 1 is applied to a construction hoist cage.

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