Turnover steel stair channel for standard floor assembly type prefabricated stair

Abstract

The utility model relates to the technical field of building construction, in particular to a turnover steel stair channel for standard floor assembly type prefabricated stairs, which is provided with a hinged support component and a bottom frame, and the hinged support component is placed on two concave positions on the other sides of two groups of stairs along the horizontal direction. The rest two corners of the bottom frame are placed on the concave positions of the tops of the two sets of stairs so as to support the bottom frame, the bottom transverse pipe assemblies and the bottom longitudinal pipe assemblies to form a bottom layer bearing mechanism in an enclosing mode, constructors can stand on the bottom layer bearing mechanism to install the stairs, and after the stairs on the layer are installed, the hinged support assemblies are dismantled, and the constructors can conveniently install the stairs. The problems that a large amount of time is consumed, the construction progress is slow, the construction efficiency is low and the construction cost is high due to the fact that a floor type scaffold is mainly erected to serve as a construction operation frame and a channel for workers to go up and down in the existing method and needs to be repeatedly erected and dismantled are effectively solved. And the labor cost is also increased.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a rotatable steel staircase passage for standard-floor assembled prefabricated stairs. Background Art

[0002] Traditional prefabricated scissor-shaped stairs, also known as stacked stairs or nested stairs, are constructed from two double-tread straight staircases arranged side by side. This design divides the stairwell into two, with each side featuring a set of straight, straight stairs without turns, directly connecting the current floor to the next. The two sets of stairs slope in opposite directions, one to the right and the other to the left, creating a scissor-like shape.

[0003] Current construction, especially the construction of working floors with traditional prefabricated scissor-shaped staircases, primarily relies on the erection of ground-based scaffolding, which serves as both a construction platform and a pathway for workers to ascend and descend. This approach presents significant operational limitations. First, the erection and dismantling of the scaffolding is a repetitive process that not only consumes considerable time and slows construction progress, but also increases labor costs. Each scaffolding erection and dismantling operation requires specialized personnel, which undoubtedly increases labor costs during the construction process.

[0004] The present invention is proposed in view of the deficiencies in the prior art. Utility Model Content

[0005] In view of the above-mentioned existing practices, which mainly rely on setting up ground-type scaffolding as a construction operation frame and a passage for workers to go up and down, this practice requires repeated setting up and dismantling of the scaffolding, which not only consumes a lot of time and slows down the construction progress, but also increases the labor cost. The technical solution adopted by the present invention to solve the technical problem is:

[0006] A rotatable steel staircase passage for standard-floor assembled prefabricated stairs comprises a steel staircase frame, wherein the steel staircase frame comprises a bottom frame, a hinge support assembly for supporting the bottom frame on stair pillars and detachably connected to the bottom frame, the bottom frame comprises a bottom transverse tube assembly, and a bottom longitudinal tube assembly connected to the bottom transverse tube assembly, wherein the bottom transverse tube assembly and the bottom longitudinal tube assembly together form a bottom supporting mechanism for construction workers to stand on.

[0007] Furthermore, the bottom supporting mechanism includes a first bottom supporting channel and a second bottom supporting channel arranged symmetrically with the center of the first bottom supporting channel; the bottom transverse tube assembly includes a first bottom transverse tube and a second bottom transverse tube arranged corresponding to the first bottom transverse tube; the bottom longitudinal tube assembly includes a second bottom longitudinal tube and a third bottom longitudinal tube arranged corresponding to the second bottom longitudinal tube; the first bottom transverse tube, the second bottom transverse tube, the second bottom longitudinal tube and the third bottom longitudinal tube together form a bottom supporting area, and iron sheets are laid on the bottom supporting area to form a first bottom supporting channel.

[0008] Furthermore, the bottom transverse tube assembly includes a fourth bottom transverse tube arranged corresponding to the first bottom transverse tube, and both ends of the first bottom transverse tube and the fourth bottom transverse tube are provided with connecting pieces connected to the hinge support assembly.

[0009] Furthermore, the steel staircase frame includes a middle-layer supporting mechanism located above the bottom frame, and a longitudinal pipe assembly arranged in a vertical direction is provided between the middle-layer supporting mechanism and the bottom frame.

[0010] Furthermore, the middle-layer supporting mechanism includes a first middle-layer supporting channel arranged along the length direction of the first bottom transverse tube and parallel to the first bottom-layer supporting channel, and a second middle-layer supporting channel arranged symmetrically with the first middle-layer supporting channel and parallel to the second bottom-layer supporting channel.

[0011] Furthermore, the bottom transverse tube assembly also includes a third bottom transverse tube located between the second bottom transverse tube and the fourth bottom transverse tube and corresponding to the first bottom transverse tube, the bottom longitudinal tube assembly includes a first bottom longitudinal tube located between the first bottom transverse tube and the fourth bottom transverse tube and corresponding to the second bottom longitudinal tube, and a steel staircase assembly arranged in a vertical direction and extending obliquely along the length direction of the first bottom transverse tube is provided between the second bottom transverse tube and the third bottom transverse tube, and the end of the steel staircase assembly close to the bottom frame is connected to the first bottom longitudinal tube.

[0012] Furthermore, the steel staircase frame includes a first upper staircase protection frame connected to the first middle supporting channel and arranged along the vertical direction, and a second upper staircase protection frame connected to the second middle supporting channel and arranged along the vertical direction.

[0013] Furthermore, the steel staircase assembly is provided with a bottom protection frame on one side close to the bottom frame.

[0014] Furthermore, the bottom protection frame is located between the second bottom transverse tube and the third bottom transverse tube and extends in the vertical direction, and the cross section of the bottom protection frame is "L"-shaped.

[0015] Furthermore, the hinge support assembly includes a support portion arranged in the vertical direction, a connecting portion vertically connected to the support portion and arranged in the horizontal direction, and the connecting portion is detachably connected to the two end portions of the first bottom transverse tube and the two end portions of the fourth bottom transverse tube through connecting pieces.

[0016] The beneficial effects of the utility model are as follows:

[0017] The two scaffolds are connected to each other by a hinged support assembly and a detachable connection between the bottom frame and the staircase, and the two scaffolds are placed on the other side of the two sets of stairs, that is, the two corners of the bottom frame connected to the hinged support assembly are placed on the recessed positions on the other side of the two sets of stairs along the horizontal direction, and the remaining two corners of the bottom frame are placed on the recessed positions at the tops of the two sets of stairs, thereby supporting the bottom frame. The bottom frame includes a bottom longitudinal tube assembly and a bottom transverse tube assembly. The bottom transverse tube assembly and the bottom longitudinal tube assembly enclose a bottom support mechanism. Construction workers can stand on the bottom support mechanism to install the stairs. When the stairs on this floor are installed, the two hinged support assemblies are removed and the bottom frame is hoisted to the next floor for construction workers to continue using. This effectively solves the problem that the existing practice mainly relies on setting up a ground-type scaffold as a construction operation frame and a passage for workers to go up and down. This practice requires repeated erection and dismantling of the scaffold, which not only takes a lot of time, but also slows down the construction progress and increases labor costs.

[0018] 2. The bottom frame and hinge support assembly are detachably connected so that the steel staircase frame can be transferred and installed between different construction sites, greatly improving construction efficiency.

[0019] The present invention will be further described below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a revolving steel staircase passage for standard-floor prefabricated stairs of the present invention;

[0021] Figure 2 This is a top view of a revolving steel staircase passage for standard-floor prefabricated stairs according to the present invention;

[0022] Figure 3 for Figure 2 Schematic cross-sectional view along line AA;

[0023] Figure 4 for Figure 2Schematic cross-sectional view along line BB;

[0024] Figure 5 for Figure 2 Schematic cross-sectional view along line CC;

[0025] Figure 6 for Figure 2 Schematic cross-sectional view along line DD;

[0026] Figure 7 This is one of the structural diagrams of the hinge support assembly of the present invention;

[0027] Figure 8 This is the second structural diagram of the hinge support assembly of the present invention. DETAILED DESCRIPTION

[0028] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings.

[0029] like Figures 1 to 8 The illustrated embodiment of a revolving steel stairway for a standard-floor prefabricated staircase comprises a steel staircase frame 1, the steel staircase frame 1 including a bottom frame 2, a hinge support assembly 3 for supporting the bottom frame 2 on stair pillars and detachably connected to the bottom frame 2, the bottom frame 2 including a bottom transverse tube assembly 21 and a bottom longitudinal tube assembly 22 connected to the bottom transverse tube assembly 21. The bottom transverse tube assembly 21 and the bottom longitudinal tube assembly 22 together form a bottom support structure 4 for construction workers to stand on.

[0030] The two scaffolds are connected to each other by a hinged support assembly and a detachable connection between the bottom frame and the two sets of stairs, that is, the two corners of the bottom frame connected to the hinged support assembly are placed on the recessed positions on the other side of the two sets of stairs in the horizontal direction, and the remaining two corners of the bottom frame are placed on the recessed positions at the tops of the two sets of stairs, thereby supporting the bottom frame. The bottom frame includes a bottom longitudinal tube assembly and a bottom transverse tube assembly, and the bottom transverse tube assembly and the bottom longitudinal tube assembly enclose a bottom supporting mechanism. Construction workers can stand on the bottom supporting mechanism to install the stairs. When the installation of the stairs on this floor is completed, the two hinged support assemblies are removed and the bottom frame is hoisted to the next floor for construction workers to continue using. This effectively solves the problem that the existing practice mainly relies on setting up a ground-type scaffold as a construction operation frame and a passage for workers to go up and down. This practice requires repeated setting up and dismantling of the scaffold, which not only consumes a lot of time, resulting in slow construction progress, but also increases labor costs.

[0031] Specifically, the bottom frame 2 is a quadrilateral and has four corners, two corners of the bottom frame 2 are respectively located on the first recess 100 and the second recess 101, and the remaining two corners of the bottom frame 2 are respectively located on the two recesses on the other side of the first recess 100 and the second recess 101 in the horizontal direction, wherein the first recess 100 and the second recess 101 are located on the same side, and the number of hinge support assemblies 3 is two and they are arranged diagonally. If the hinge support assembly 3 is located on the first recess 100, the other hinge support assembly 3 is located at the diagonal position of the first recess 100 in the horizontal direction; if the hinge support assembly 3 is located on the second recess 101, the other hinge support assembly 3 is located at the diagonal position of the second recess 101 in the horizontal direction.

[0032] The bottom frame 2 and the hinge support assembly 3 are detachably connected so that the steel staircase frame 1 can be transferred and installed between different construction sites, greatly improving construction efficiency.

[0033] Furthermore, the cross section of the bottom frame 2 is rectangular, and the rectangular cross section of the bottom frame 2 corresponds to the shape of the cross section of the stairwell; secondly, the rectangular structure has four right angles and four sides, and this shape has greater stability and can withstand greater loads.

[0034] like Figures 1 to 8 The bottom support mechanism 4 shown includes a first bottom support channel 41 and a second bottom support channel 42 centrally symmetrically arranged with respect to the first bottom support channel 41. The bottom transverse tube assembly 21 includes a first bottom transverse tube 211 and a second bottom transverse tube 212 corresponding to the first bottom transverse tube 211. The bottom longitudinal tube assembly 22 includes a second bottom longitudinal tube 222 and a third bottom longitudinal tube 223 corresponding to the second bottom longitudinal tube 222. The first bottom transverse tube 211, the second bottom transverse tube 212, the second bottom longitudinal tube 222, and the third bottom longitudinal tube 223 collectively form a bottom support area. Iron sheets are laid on the bottom support area to form the first bottom support channel 41.

[0035] Specifically, the bottom frame 2 is formed by four transverse tubes (a first bottom transverse tube 211, a second bottom transverse tube 212, a third bottom transverse tube 213, and a fourth bottom transverse tube 214) and three longitudinal tubes (a first bottom longitudinal tube 221, a second bottom longitudinal tube 222, and a third bottom longitudinal tube 223). The first bottom transverse tube 211, the second bottom transverse tube 212, the second bottom longitudinal tube 222, and the third bottom longitudinal tube 223 form a rectangular bottom supporting area, on which iron sheets are laid to form a first bottom supporting channel 41. Similarly, the third bottom transverse tube 213, the fourth bottom transverse tube 214, the second bottom longitudinal tube 222, and the first bottom longitudinal tube 221 form a rectangular bottom supporting area, on which iron sheets are laid to form a second bottom supporting channel 42.

[0036] Furthermore, the iron sheet is welded to the bottom supporting area.

[0037] Furthermore, the symmetrically arranged first bottom supporting channel 41 and the second bottom supporting channel 42 respectively correspond to the installation positions of the two sets of scissor-shaped stairs for construction workers to stand, thereby installing the two sets of stairs.

[0038] Furthermore, the bottom supporting area is formed by enclosing each bottom transverse tube and each bottom longitudinal tube, which is beneficial for dispersing and bearing the weight and pressure from above, thereby enhancing the stability of the entire device.

[0039] Furthermore, by providing a first bottom supporting channel 41 and a second bottom supporting channel 42 that are centrally symmetrical, it is effectively ensured that the two channels bear a uniform load during use, thereby avoiding safety hazards caused by uneven force.

[0040] Furthermore, as a preferred embodiment of the present invention but not a limitation thereof, the first bottom transverse tube 211 and the fourth bottom transverse tube 214 both adopt 16# I-steel, the second bottom transverse tube 212 and the third bottom transverse tube 213 both adopt 50mm*50mm square tube, the first bottom longitudinal tube 221, the second bottom longitudinal tube 222 and the third bottom longitudinal tube 223 all adopt 100mm*50mm square tube, and 16# I-steel is used as the first bottom transverse tube 211 and the fourth bottom transverse tube 214. Its high bending strength, compressive strength and torsional stiffness ensure that these two key positions can withstand large loads; secondly, by reasonably matching different types of I-steel and square tubes, effective cost control can be achieved while ensuring structural strength and stability.

[0041] Furthermore, each bottom transverse tube and each bottom longitudinal tube are connected by welding.

[0042] like Figures 1 to 8The bottom transverse tube assembly 21 shown includes a fourth bottom transverse tube 214 arranged corresponding to the first bottom transverse tube 211, and both ends of the first bottom transverse tube 211 and the fourth bottom transverse tube 214 are provided with connecting pieces connected to the hinge support assembly 3;

[0043] Furthermore, there are two hinge support assemblies 3, each located on the other side of the prefabricated staircase.

[0044] Furthermore, the hinge support assembly 3 can effectively support the first bottom transverse tube 211 and the fourth bottom transverse tube 214 to prevent them from being displaced or deformed due to pressure or weight, thereby enhancing the stability of the entire structure.

[0045] Furthermore, by providing connectors connected to the hinge support assembly 3 at both ends of the first bottom transverse tube 211 and the fourth bottom transverse tube 214 , the bottom frame 2 and the hinge support assembly 3 can be easily installed and disassembled.

[0046] like Figures 1 to 8 The steel staircase frame 1 shown includes a middle-layer supporting mechanism 5 located above the bottom frame 2, and a longitudinal pipe assembly 6 arranged in the vertical direction is provided between the middle-layer supporting mechanism 5 and the bottom frame 2;

[0047] Furthermore, the longitudinal tube assembly 6 provides a solid support between the bottom frame 2 and the middle supporting mechanism 5, effectively ensuring the stability of the entire frame in the vertical direction. This arrangement can effectively prevent the frame from shaking or tilting when subjected to external forces.

[0048] Furthermore, the longitudinal tube assembly 6, as one of the main load-bearing components of the frame, can bear the weight and pressure from above or from the user. Connecting the middle-level supporting mechanism 5 with the bottom frame 2 through the longitudinal tube assembly 6 can ensure that the entire stair frame has sufficient load-bearing capacity to meet daily use and safety requirements.

[0049] Furthermore, by using the longitudinal tube assembly 6 to connect the middle-layer supporting mechanism 5 and the bottom frame, the middle-layer supporting mechanism 5 can also provide space for construction workers to stand. Through such an arrangement, there is no need to frequently hoist the bottom frame 2, which reduces the number and cost of hoisting and helps to speed up the construction progress.

[0050] Furthermore, as a preferred embodiment of the present invention but not a limitation, the middle layer supporting mechanism 5 , the bottom frame 2 and the longitudinal tube assembly 6 are all connected by welding.

[0051] like Figures 1 to 8The middle-layer supporting mechanism 5 shown includes a first middle-layer supporting channel 51 arranged along the length direction of the first bottom transverse tube 211 and parallel to the first bottom-layer supporting channel 41, and a second middle-layer supporting channel 52 arranged symmetrically with the first middle-layer supporting channel 51 and parallel to the second bottom-layer supporting channel 42;

[0052] Furthermore, the first middle layer supporting channel 51 is located directly above the first bottom layer supporting channel 41, and the second middle layer supporting channel 52 is located directly above the second bottom layer supporting channel 42. The horizontal lengths of the first middle layer supporting channel 51 and the second middle layer supporting channel 52 are the same as the length of the first bottom transverse tube 211.

[0053] Furthermore, the first middle-layer supporting channel 51 and the second middle-layer supporting channel 52 can serve as temporary work platforms for construction workers. Construction workers can stand on these channels to work, reducing the extra workload and safety risks caused by frequent movement or construction of temporary work platforms.

[0054] like Figures 1 to 8 The bottom transverse tube assembly 21 shown further includes a third bottom transverse tube 213 located between the second bottom transverse tube 212 and the fourth bottom transverse tube 214 and corresponding to the first bottom transverse tube 211. The bottom longitudinal tube assembly 22 includes a first bottom longitudinal tube 221 located between the first bottom transverse tube 211 and the fourth bottom transverse tube 214 and corresponding to the second bottom longitudinal tube 222. A steel staircase assembly 7 is provided between the second bottom transverse tube 212 and the third bottom transverse tube 213, which is arranged in a vertical direction and extends obliquely along the length direction of the first bottom transverse tube 211. The end of the steel staircase assembly 7 close to the bottom frame 2 is connected to the first bottom longitudinal tube 221.

[0055] Furthermore, the end of the steel staircase assembly 7 closest to the bottom frame 2 is connected to the first bottom longitudinal tube 221. This arrangement increases the number of connection points between the steel staircase assembly 7 and the bottom frame 2, making the steel staircase more stable when bearing weight. Furthermore, the inclined extension of the steel staircase assembly 7 provides a stable passage for construction workers to easily ascend and descend the stairs, further improving construction safety.

[0056] like Figures 1 to 8 The steel staircase frame 1 shown includes a first upper staircase protection frame 81 connected to the first middle supporting channel 51 and arranged in the vertical direction, and a second upper staircase protection frame 82 connected to the second middle supporting channel 52 and arranged in the vertical direction;

[0057] Furthermore, the first upper stair protection frame 81 and the second upper stair protection frame 82 not only provide additional support for the device, but also play a protective role. They can prevent people or objects from accidentally falling from the stairs, which is conducive to increasing the safety of stair use.

[0058] Furthermore, the connection between the first upper stair protection frame 81 and the second upper stair protection frame 82 and the first middle supporting channel 51 and the second middle supporting channel 52 respectively enhances the vertical support of the entire steel staircase frame 1. This arrangement makes the stairs more stable when bearing loads and reduces safety risks caused by structural deformation or damage.

[0059] like Figures 1 to 8 The steel staircase assembly 1 shown is provided with a bottom protection frame 23 on one side close to the bottom frame 2;

[0060] Furthermore, the provision of the bottom protection frame 23 effectively prevents people or objects from falling from the bottom frame 2, especially when the space between the stairs and the ground is large or there is potential danger, such a protection frame can effectively provide additional safety protection.

[0061] Furthermore, the connection between the bottom protective frame 23 and the bottom frame 2 can enhance the stability of the entire staircase frame, especially on the side of the steel staircase assembly 7 close to the bottom frame 2. This reinforcement setting helps to improve the load-bearing capacity and service life of the steel staircase assembly 7.

[0062] Furthermore, the bottom frame 2 and the bottom protection frame 23 are connected by welding.

[0063] like Figures 1 to 8 The bottom protection frame 23 is located between the second bottom transverse tube 212 and the third bottom transverse tube 213 and extends in the vertical direction. The cross section of the bottom protection frame 23 is "L"-shaped.

[0064] Furthermore, the cross section of the bottom protection frame 23 is "L"-shaped, and the other side does not need to be set as "U"-shaped because there are protections on both sides of the stair treads.

[0065] Furthermore, the “L”-shaped cross-section configuration enables the bottom protection frame 23 to have stronger structural rigidity and stability while providing a protective function.

[0066] like Figures 1 to 8 The hinge support assembly 3 shown includes a support portion 31 arranged in the vertical direction, and a connecting portion 32 perpendicularly connected to the support portion 31 and arranged in the horizontal direction. The connecting portion 32 is detachably connected to the two ends of the first bottom transverse tube 211 and the two ends of the fourth bottom transverse tube 214 through connecting pieces.

[0067] Furthermore, the supporting portion 31 and the connecting portion 32 are both made of 16# I-beam.

[0068] Specifically, 16# I-beams are used for cutting and manufacturing. The lengths of the I-beams of the support part 31 and the connection part 32 are determined according to the size of the structural platform. The upper and lower legs of one end of the I-beam of the connection part 32 need to be cut off, and the middle part is retained. Then, four holes are opened on the connection part 32 using a hole opener. Finally, the support part 31 and the processed connection part 32 are fixed by welding. The welding requires full welding on both sides.

[0069] Furthermore, the connecting member is a high-strength bolt, and the connecting portion 32 is detachably connected to both ends of the first bottom transverse tube 211 and both ends of the fourth bottom transverse tube 214 through the high-strength bolt.

[0070] The implementation of this embodiment is as follows:

[0071] A revolving steel staircase passage for standard-floor assembled prefabricated stairs, comprising a steel staircase frame 1, the steel staircase frame 1 comprising a bottom frame 2, the bottom frame 2 comprising a bottom transverse tube assembly 21 and a bottom longitudinal tube assembly 22, the bottom transverse tube assembly 21 comprising a first bottom transverse tube 211, a second bottom transverse tube 212, a third bottom transverse tube 213 and a fourth bottom transverse tube 214, the bottom longitudinal tube assembly 22 comprising a first bottom longitudinal tube 221, a second bottom longitudinal tube 222 and a third bottom longitudinal tube 223, the first bottom transverse tube 211, the second bottom transverse tube 212, the second bottom longitudinal tube 222 and the third bottom longitudinal tube 223 enclose a bottom supporting area, iron sheets are laid on the bottom supporting area to form a first bottom supporting channel 41, similarly, the fourth bottom transverse tube 214, the third bottom transverse tube 213, the second bottom longitudinal tube 222 and the first bottom longitudinal tube 221 enclose a bottom supporting area, the bottom supporting area Iron sheets are laid on the layer supporting area to form a second bottom supporting channel 42. The steel staircase frame 1 also includes a hinge support assembly 3 detachably connected to the bottom frame 2. The hinge support assembly 3 is placed on the other side of the two sets of stairs, that is, the two corners of the bottom frame 2 connected to the hinge support assembly 3 are placed on the recessed position on the other side of the two sets of stairs in the horizontal direction, and the remaining two corners of the bottom frame 2 are placed on the recessed position at the top of the two sets of stairs, thereby supporting the bottom frame 2. Construction workers can stand on the first bottom supporting channel 41 and the second bottom supporting channel 42 to install the stairs. When the installation of the stairs on this floor is completed, the two hinge support assemblies 3 are removed and the bottom frame 2 is hoisted to the next floor for construction workers to continue using. This effectively solves the problem that the existing practice mainly relies on setting up ground-based scaffolding as a construction operation frame and a passage for workers to go up and down. This practice requires repeated erection and dismantling of the scaffolding, which not only consumes a lot of time, resulting in slow construction progress, but also increases labor costs.

[0072] The above examples are merely used to further illustrate the technical content of the present invention for easier understanding by the reader. However, they do not limit the implementation of the present invention to these examples. Any technical extension or reinvention based on the present invention is protected by the present invention. The scope of protection of the present invention shall be determined by the claims.

Claims

1. A reusable steel stairway for standard-floor prefabricated stairs, comprising a steel staircase frame (1), characterized in that: The steel staircase frame (1) comprises a bottom frame (2), a hinge support assembly (3) for supporting the bottom frame (2) on the stair pillar and detachably connected to the bottom frame (2), the bottom frame (2) comprises a bottom transverse tube assembly (21), and a bottom longitudinal tube assembly (22) connected to the bottom transverse tube assembly (21), the bottom transverse tube assembly (21) and the bottom longitudinal tube assembly (22) enclosing to form a bottom support mechanism (4) for construction workers to stand on.

2. The reusable steel stairway for standard-floor prefabricated stairs according to claim 1, characterized in that: The bottom supporting mechanism (4) comprises a first bottom supporting channel (41) and a second bottom supporting channel (42) centrally symmetrically arranged with respect to the first bottom supporting channel (41); the bottom transverse tube assembly (21) comprises a first bottom transverse tube (211) and a second bottom transverse tube (212) corresponding to the first bottom transverse tube (211); the bottom longitudinal tube assembly (22) comprises a second bottom longitudinal tube (222) and a third bottom longitudinal tube (223) corresponding to the second bottom longitudinal tube (222); the first bottom transverse tube (211), the second bottom transverse tube (212), the second bottom longitudinal tube (222) and the third bottom longitudinal tube (223) enclose a bottom supporting area, and iron sheets are laid on the bottom supporting area to form the first bottom supporting channel (41).

3. The reusable steel stairway for standard-floor prefabricated stairs according to claim 2, characterized in that: The bottom transverse tube assembly (21) comprises a fourth bottom transverse tube (214) arranged corresponding to the first bottom transverse tube (211), and both ends of the first bottom transverse tube (211) and the fourth bottom transverse tube (214) are provided with connecting pieces connected to the hinge support assembly (3).

4. The reusable steel stairway for standard-floor prefabricated stairs according to claim 2, characterized in that: The steel staircase frame (1) comprises a middle-layer supporting mechanism (5) located above the bottom frame (2), and a longitudinal pipe assembly (6) arranged in a vertical direction is provided between the middle-layer supporting mechanism (5) and the bottom frame (2).

5. The reusable steel stairway for standard-floor prefabricated stairs according to claim 4, characterized in that: The middle-layer supporting mechanism (5) comprises a first middle-layer supporting channel (51) arranged along the length direction of the first bottom transverse tube (211) and arranged parallel to the first bottom-layer supporting channel (41), and a second middle-layer supporting channel (52) arranged symmetrically with the first middle-layer supporting channel (51) and arranged parallel to the second bottom-layer supporting channel (42).

6. The reusable steel stairway for standard-floor prefabricated stairs according to claim 3, characterized in that: The bottom transverse tube assembly (21) further includes a third bottom transverse tube (213) located between the second bottom transverse tube (212) and the fourth bottom transverse tube (214) and arranged corresponding to the first bottom transverse tube (211); the bottom longitudinal tube assembly (22) includes a first bottom longitudinal tube (221) located between the first bottom transverse tube (211) and the fourth bottom transverse tube (214) and arranged corresponding to the second bottom longitudinal tube (222); a steel staircase assembly (7) is provided between the second bottom transverse tube (212) and the third bottom transverse tube (213), the steel staircase assembly (7) being arranged in a vertical direction and extending obliquely along the length direction of the first bottom transverse tube (211); and the steel staircase assembly (7) is connected to the first bottom longitudinal tube (221) at one end close to the bottom frame (2).

7. The reusable steel stairway for standard-floor prefabricated stairs according to claim 5, characterized in that: The steel staircase frame (1) comprises a first upper staircase protection frame (81) connected to the first middle supporting channel (51) and arranged in a vertical direction, and a second upper staircase protection frame (82) connected to the second middle supporting channel (52) and arranged in a vertical direction.

8. The reusable steel stairway for standard-floor prefabricated stairs according to claim 6, characterized in that: The steel staircase assembly (7) is provided with a bottom protection frame (23) on one side close to the bottom frame (2).

9. The reusable steel stairway for standard-floor prefabricated stairs according to claim 8, characterized in that: The bottom protection frame (23) is located between the second bottom transverse tube (212) and the third bottom transverse tube (213) and is extended in the vertical direction. The cross section of the bottom protection frame (23) is L-shaped.

10. The reusable steel stairway for standard-floor prefabricated stairs according to claim 3, characterized in that: The hinge support assembly (3) comprises a support portion (31) arranged in a vertical direction, and a connection portion (32) vertically connected to the support portion (31) and arranged in a horizontal direction, wherein the connection portion (32) is detachably connected to both ends of the first bottom transverse tube (211) and both ends of the fourth bottom transverse tube (214) via connecting pieces.

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