Hanging type prefabricated stair

Abstract

The utility model relates to the technical field of prefabricated stairs, in particular to a hanging type prefabricated stair which comprises a stair steel structure frame, the inside of the stair steel structure frame is filled with a steel-concrete structure formed through pre-pouring, the stair steel structure frame is integrally formed through welding, and the stair steel structure frame comprises steel stair treads. A top plate part and a bottom plate part are horizontally arranged at the top and the bottom of the steel stair tread respectively, an inclined bearing bottom plate is arranged below the steel stair tread, and the inclined bearing bottom plate and the upper portion and the lower portion of the steel stair tread are integrally welded and formed through an upper rectangular hanging pipe part and a lower rectangular hanging pipe part respectively. The steel-concrete structure formed through pre-pouring is filled in the stair steel structure frame, the whole frame is integrally welded and formed, the bearing capacity of the stair is greatly improved through the combination mode, and the actual use requirement can be better met.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated staircase technology, and in particular to a suspended prefabricated staircase. Background Technology

[0002] In the field of building construction, the construction process of stairs has always been a key factor affecting building quality and construction efficiency. Traditional cast-in-place stair construction methods require the erection of a large amount of scaffolding on the construction site and the complex work of formwork erection.

[0003] This not only consumes a lot of manpower, material resources and time, but the construction process is also easily affected by factors such as the technical level of on-site workers and the construction environment, resulting in inconsistent construction quality and increasing construction risks and uncertainties.

[0004] While the emergence of precast staircases has improved construction efficiency to some extent, existing precast staircase technology still has many limitations. Common precast staircases mostly use a single concrete structure; however, this structure is inadequate in terms of strength and durability, making it difficult to meet the increasingly stringent requirements of modern buildings for staircase structures. During long-term use, problems such as cracks and damage are prone to occur, affecting the safety performance and service life of the staircase.

[0005] During the hoisting process, additional auxiliary tools are often needed for temporary fixation. This not only makes the operation complicated, but also makes it easy for the stairs to shake or collide due to unstable fixation during hoisting, causing structural damage and creating hidden dangers for subsequent installation and use.

[0006] In addition, the installation of stair handrails is a major challenge in the construction of traditional precast staircases. Generally, the handrails are installed only after the main structure of the staircase is completed. This requires additional connectors and complex installation steps, which not only increases the difficulty and cost of construction, but may also affect the overall aesthetics and safety due to loosening or deformation of the connections.

[0007] In summary, existing staircase construction technology has many shortcomings in terms of construction efficiency, structural performance, ease of hoisting, and installation of ancillary facilities, and an innovative design is urgently needed to solve these problems.

[0008] This utility model proposes a new type of suspended prefabricated staircase to better solve the problems existing in the prior art. Summary of the Invention

[0009] To solve one of the aforementioned technical problems, the present invention adopts the following technical solution: a suspended prefabricated staircase, comprising a staircase steel structure frame, wherein a pre-cast reinforced concrete structure is filled inside the staircase steel structure frame, the staircase steel structure frame is integrally welded, the staircase steel structure frame includes steel stair treads, the top and bottom of the steel stair treads are respectively provided with a top plate and a bottom plate, and an inclined support plate is provided below the steel stair treads. The inclined support plate is integrally welded to the upper and lower parts of the steel stair treads through an upper rectangular hanging pipe and a lower rectangular hanging pipe, respectively, forming a casting space for the casting of the reinforced concrete structure between the steel stair treads and the inclined support plate. The two sides of the steel stair treads are respectively folded upward to form staircase side stops. An upper hanging hole and a lower hanging hole are integrally formed at both ends of the upper rectangular hanging pipe and the lower rectangular hanging pipe, respectively, and the upper hanging hole and the lower hanging hole both penetrate the top and bottom of the current part of the reinforced concrete structure.

[0010] In any of the above embodiments, it is preferred that handrails are bolted to the horizontal middle portion of each of the stair side rails.

[0011] In any of the above embodiments, it is preferred that the handrail component includes a protective handrail strip that is fitted onto the top of the straight section in the middle of the stair side rail. The protective handrail strip is connected to the prefabricated handrail connection holes at corresponding positions on the stair side rail by a number of spaced bolts, and the entire protective handrail is fixed in place after the connection is completed.

[0012] In any of the above embodiments, it is preferred that upper reinforcing rib plates are welded between the two sides of the upper rectangular hanging pipe and the stair side stops at their corresponding positions.

[0013] In any of the above embodiments, it is preferred that a lower reinforcing rib plate seat is welded between both sides of the lower rectangular hanging pipe and the stair side stop at the corresponding position.

[0014] In any of the above embodiments, it is preferred that a plurality of lower internal reinforcing ribs are integrally formed along the length direction of the rectangular cavity of the upper rectangular hanging tube.

[0015] In any of the above embodiments, it is preferred that a plurality of upper internal reinforcing ribs are integrally formed along the length direction of the rectangular cavity of the upper rectangular hanging tube.

[0016] In any of the above embodiments, it is preferred that a bottom reinforcing plate is welded between the bottom of the upper rectangular hanging tube and the top of the inclined support base plate.

[0017] In any of the above embodiments, it is preferred that a hanging restraint tube is inserted into the interior of both the upper and lower hanging holes, and the top and bottom of the hanging restraint tube are integrally welded to the steel structure frame of the staircase.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. Overall prefabrication and steel formwork cladding: Steel formwork is attached to the outside of the concrete staircase, and after pouring, a prefabricated staircase with an external steel structure is formed. Compared with the traditional on-site formwork pouring of staircases, this method enhances the overall structural strength of the staircase, improves stability and durability, and also conforms to the trend of industrialized prefabrication production, improving production efficiency and product quality.

[0020] 2. Upper and lower lifting holes are provided at the four corners of the steel structure frame of the staircase, penetrating the reinforced concrete structure. This facilitates the overall lifting and installation of the staircase using external lifting equipment, simplifies the construction process, and improves construction efficiency.

[0021] 3. The staircase steel frame is filled with a pre-cast steel-concrete structure, and the frame is welded as a whole. This combination method greatly improves the load-bearing capacity of the staircase and can better meet the actual use needs.

[0022] 4. The handrail is horizontally bolted to the middle of the stair side rail, and the protective handrail strip is clipped onto the stair side rail and connected to the prefabricated handrail connection holes with bolts. This design facilitates the installation and removal of the handrail, makes it easy to maintain and replace later, and ensures the safety of pedestrians.

[0023] 5. Upper and lower reinforcing rib seats are installed between the upper and lower rectangular hanging pipe sections and the stair side rails. Upper and lower internal reinforcing ribs are installed within the cavity of the upper rectangular hanging pipe section. A bottom reinforcing rib seat is welded between the bottom of the upper rectangular hanging pipe section and the top of the inclined support plate. Hanging restraint tubes welded to the frame are inserted into the lifting holes. These reinforcing structures comprehensively enhance the connection strength, inherent strength, and safety of the lifting holes of each staircase component, improving the overall structural stability and load-bearing capacity. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0027] Figure 3 This is a top view of the structure of this utility model.

[0028] Figure 4 This is a three-dimensional structural diagram of the steel frame of the staircase according to this utility model.

[0029] Figure 5 This is a front view schematic diagram of the steel structure frame of the staircase according to this utility model.

[0030] Figure 6 This is a three-dimensional structural diagram of the handrail component of this utility model.

[0031] Figure 7 This is a schematic diagram of the structure of the protective handrail strip of this utility model.

[0032] In the diagram, 1. Staircase steel frame; 2. Reinforced concrete structure; 3. Steel stair treads; 4. Top slab; 5. Bottom slab; 6. Inclined supporting bottom slab; 7. Upper rectangular hanging pipe section; 8. Lower rectangular hanging pipe section; 9. Staircase side rails; 10. Upper lifting hole; 11. Lower lifting hole; 12. Protective handrail strip; 13. Bolts; 14. Precast handrail connection hole; 15. Upper reinforcing rib plate seat; 16. Lower reinforcing rib plate seat; 17. Lower built-in reinforcing rib; 18. Upper built-in reinforcing rib; 19. Bottom reinforcing plate seat; 20. Hanging restraint pipe. Detailed Implementation

[0033] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are therefore merely examples and should not be construed as limiting the scope of protection of the present utility model. The specific structure of the present utility model is as follows: Figures 1-7 As shown in the image.

[0034] Example 1: To solve one of the above-mentioned technical problems, the present invention adopts the following technical solution: a suspended prefabricated staircase, comprising a staircase steel structure frame 1, wherein the interior of the staircase steel structure frame 1 is filled with a precast steel-concrete structure 2, the staircase steel structure frame 1 is integrally welded, the staircase steel structure frame 1 includes steel stair treads 3, the top and bottom of the steel stair treads 3 are respectively provided with a top plate 4 and a bottom plate 5 horizontally, and an inclined support bottom plate 6 is provided below the steel stair treads 3, the inclined support bottom plate 6 and the steel stair treads 3 are connected to the steel stair treads 3. The upper and lower parts of the steel stair tread 3 are integrally welded together by the upper rectangular hanging pipe 7 and the lower rectangular hanging pipe 8, respectively. A casting space for the steel-concrete structure 2 is formed between the steel stair tread 3 and the inclined supporting base plate 6. The two sides of the steel stair tread 3 are folded upward to form stair side stops 9. The upper hanging pipe 7 and the lower rectangular hanging pipe 8 are integrally formed with upper hanging holes 10 and lower hanging holes 11 at both ends, respectively. The upper hanging holes 10 and the lower hanging holes 11 both penetrate the top and bottom of the steel-concrete structure 2 at the current location.

[0035] The staircase steel structure frame 1 is filled with a pre-cast steel-concrete structure 2, which is then welded together to give the staircase higher load-bearing capacity and stability, meeting actual usage requirements.

[0036] The top plate 4 and bottom plate 5 of the steel stair tread 3 limit the internal reinforced concrete structure 2, preventing displacement during pouring and use. The inclined support plate 6 is welded to the steel stair tread 3 through the upper rectangular hanging pipe 7 and the lower rectangular hanging pipe 8, which not only provides support for the reinforced concrete structure 2, but also works with other components to form a stable structural frame.

[0037] The side railing 9 of the staircase serves as a protective structure during pouring and ensures pedestrian safety during use. The upper and lower lifting holes 10 and 11, which penetrate the reinforced concrete structure 2, facilitate connection with external lifting equipment, enabling the overall hoisting and installation of the staircase while ensuring sufficient load-bearing capacity.

[0038] In any of the above embodiments, it is preferred that handrails are bolted to the horizontal middle portion of each of the stair side stops 9. Installing handrails on the stair side stops 9 provides support and grabs for pedestrians, effectively reducing the risk of falls while going up and down stairs and ensuring walking safety.

[0039] In any of the above embodiments, it is preferred that the handrail component includes a protective handrail strip 12 that is fitted onto the top of the straight section in the middle of the stair side stop 9. The protective handrail strip 12 is connected to the prefabricated handrail connection hole 14 at the corresponding position on the stair side stop 9 by a number of spaced bolts 13, and the connection is completed to achieve the tight fixation of the entire protective handrail.

[0040] The protective handrail strip 12 is fitted onto the side rail of the staircase 9 and connected to the prefabricated handrail connection hole 14 via bolts 13. This connection method facilitates the installation and disassembly of the handrail components and makes it convenient to operate when maintenance or replacement is required. At the same time, the spaced bolts 13 can securely fix the protective handrail strip 12 to the side rail of the staircase 9, ensuring its safety in use.

[0041] Example 2: Compared with Example 1, this example also includes the following technical features:

[0042] In any of the above embodiments, it is preferred that upper reinforcing rib plates 15 are welded between both sides of the upper rectangular hanging pipe section 7 and the corresponding stair side stops 9. The upper reinforcing rib plates 15 are welded between the upper rectangular hanging pipe section 7 and the stair side stops 9, which can effectively enhance the connection strength between the two, making the entire structure more stable under stress and reducing the possibility of structural damage due to weak connections.

[0043] In any of the above embodiments, it is preferred that lower reinforcing rib plate seats 16 are welded between both sides of the lower rectangular hanging pipe section 8 and the corresponding stair side stop section 9. The lower reinforcing rib plate seats 16 have a similar function to the upper reinforcing rib plate seats 15, and are welded between the lower rectangular hanging pipe section 8 and the stair side stop section 9, thereby enhancing the strength of the connection and further improving the stability and load-bearing capacity of the overall structure.

[0044] In any of the above embodiments, it is preferred that a plurality of lower internal reinforcing ribs 17 are integrally formed along the length of the rectangular cavity of the upper rectangular hanging pipe section 7. The lower internal reinforcing ribs 17 within the cavity of the upper rectangular hanging pipe section 7 enhance the structural strength of the upper rectangular hanging pipe section 7 itself, making it less prone to deformation when subjected to external forces from various directions, thus ensuring the reliability of the staircase structure.

[0045] In any of the above embodiments, it is preferred that a plurality of upper internal reinforcing ribs 18 are integrally formed along the length of the rectangular cavity of the upper rectangular hanging pipe section 7. The upper internal reinforcing ribs 18 further enhance the strength of the upper rectangular hanging pipe section 7, and together with the lower internal reinforcing ribs 17, comprehensively improve the load-bearing capacity and deformation resistance of the upper rectangular hanging pipe section 7, ensuring the safety of the staircase during use.

[0046] In any of the above embodiments, it is preferred that a bottom reinforcing plate seat 19 is welded between the bottom of the upper rectangular hanging pipe section 7 and the top of the inclined support base plate 6. The bottom reinforcing plate seat 19 is welded between the bottom of the upper rectangular hanging pipe section 7 and the top of the inclined support base plate 6, which enhances the connection strength between these two key parts, helps to distribute the stress, and improves the stability and load-bearing capacity of the entire staircase structure.

[0047] In any of the above embodiments, it is preferred that a hanging restraint tube 20 is inserted into the interior of both the upper hanging hole 10 and the lower hanging hole 11, and the top and bottom of the hanging restraint tube 20 are integrally welded to the stair steel structure frame 1.

[0048] The suspension restraint tubes 20 are inserted into the upper suspension hole 10 and the lower suspension hole 11 and welded to the frame. They can restrain the ropes during the hoisting process, prevent the ropes from coming out of the hoisting hole and avoid safety accidents. At the same time, the suspension restraint tubes 20 can also enhance the structural strength of the hoisting hole area and improve the overall reliability of the staircase.

[0049] In summary, the prefabricated and steel-formwork-encased structure of this utility model involves attaching steel formwork to the outside of a concrete staircase, which, after pouring, forms a prefabricated staircase with an externally encased steel structure. Compared to traditional on-site formwork casting of staircases, this method enhances the overall structural strength of the staircase, improves stability and durability, and aligns with the trend of industrialized prefabrication, thereby increasing production efficiency and product quality. Upper and lower lifting holes 10 and 11 are provided at the four corners of the staircase steel frame 1, penetrating the steel-concrete structure 2, facilitating the overall lifting and installation of the staircase using external lifting equipment, simplifying the construction process, and improving construction efficiency. Furthermore, the staircase steel frame 1 is filled with pre-cast steel-concrete structure 2, and the frame is integrally welded. This combination significantly increases the load-bearing capacity of the staircase, better meeting actual usage requirements. Handrail components are horizontally bolted to the middle of the staircase side rail 9, secured to the side rail 9 by protective handrail strips 12, and connected to the prefabricated handrail connection holes 14 using bolts 13. This design facilitates the installation and removal of handrails, making future maintenance and replacement easy, while ensuring pedestrian safety. Simultaneously, upper and lower reinforcing rib seats 15 and 16 are installed between the upper rectangular hanging pipe section 7, the lower rectangular hanging pipe section 8, and the stair side rail section 9. Upper and lower internal reinforcing ribs 18 and 17 are installed within the cavity of the upper rectangular hanging pipe section 7. A bottom reinforcing plate seat 19 is welded between the bottom of the upper rectangular hanging pipe section 7 and the top of the inclined support base plate 6. Hanging constraint tubes 20, welded to the frame, are inserted into the lifting holes. These reinforcing structures comprehensively enhance the connection strength, inherent strength, and safety of the lifting holes of all stair components, improving the overall structural stability and load-bearing capacity.

[0050] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. For those skilled in the art, any alternative improvements or transformations made to the implementation of this utility model fall within the protection scope of this utility model.

[0051] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A suspended precast stair, characterized by: The application relates to a steel structure frame of a staircase, which is integrally welded and formed as a whole, and is internally filled with a pre-cast steel-concrete structure, wherein the steel structure frame of the staircase comprises a steel staircase step, the top and bottom of the steel staircase step are respectively provided with a top plate part and a bottom plate part, an inclined supporting bottom plate is arranged below the steel staircase step, the upper part and the lower part of the steel staircase step are respectively integrally welded and formed with an upper rectangular hanging pipe part and a lower rectangular hanging pipe part through the inclined supporting bottom plate, a pouring space for pouring the steel-concrete structure is formed between the steel staircase step and the inclined supporting bottom plate, the two sides of the steel staircase step are respectively upwardly folded to form staircase side blocking parts, upper hanging holes and lower hanging holes are integrally formed at the two ends of the upper rectangular hanging pipe part and the lower rectangular hanging pipe part, and the upper hanging holes and the lower hanging holes penetrate the top and the bottom of the steel-concrete structure.

2. A suspended precast stair according to claim 1, wherein: Handrail parts are respectively bolted and installed at the middle horizontal parts of the staircase side blocking parts.

3. A suspended precast stair according to claim 2, wherein: The handrail parts comprise protective handrail strips which are sleeved on the top of the middle flat sections of the staircase side blocking parts, the protective handrail strips are connected with preformed handrail connecting holes at corresponding positions of the staircase side blocking parts through a plurality of interval arranged bolt parts, and the protective handrails are tightly positioned after being connected.

4. A suspended precast stair according to claim 3, wherein: Upper reinforcing rib plate seats are welded between the two sides of the upper rectangular hanging pipe part and the corresponding positions of the staircase side blocking parts.

5. A suspended precast stair according to claim 4, wherein: Lower reinforcing rib plate seats are welded between the two sides of the lower rectangular hanging pipe part and the corresponding positions of the staircase side blocking parts.

6. A suspended precast stair according to claim 5, wherein: A plurality of interval arranged lower built-in reinforcing ribs are integrally formed in the rectangular pipe cavity of the upper rectangular hanging pipe part along the length direction.

7. A suspended precast stair according to claim 6, wherein: A plurality of interval arranged upper built-in reinforcing ribs are integrally formed in the rectangular pipe cavity of the upper rectangular hanging pipe part along the length direction.

8. A suspended precast stair according to claim 7, wherein: A bottom reinforcing plate seat is welded between the bottom of the upper rectangular hanging pipe part and the top of the inclined supporting bottom plate.

9. A suspended precast stair according to claim 8, wherein: Hanging constraint pipes are inserted into the upper hanging holes and the lower hanging holes, and the top and the bottom of the hanging constraint pipes are respectively integrally welded and formed with the steel structure frame of the staircase.

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