Steel structure stair capable of being reinforced and connected with foundation pit

Abstract

The utility model relates to the technical field of stairs, discloses a steel structure stair capable of reinforcing connection with a foundation pit, solves the problem of safety risks caused by unstable connection such as falling, slipping, displacement and the like of an existing steel structure stair in installation and connection of the foundation pit, and realizes stable connection with the foundation pit by arranging a connecting assembly. The stability and safety of the staircase are remarkably improved, accurate installation is guaranteed through guide keys and guide grooves of the connecting assemblies, structural deviation is prevented, when the staircase settles, an extrusion unfolding mechanism is activated, a first unfolding arm and a second unfolding arm are rapidly unfolded to firmly grasp soil, soil anchoring force is provided, and through the synergistic effect of a damping spring and a supporting table, the stability and safety of the staircase are improved. The expansion strength of the expansion arms is effectively controlled, meanwhile, stable supporting is provided, the supporting plates and the conical nails transmit loads to the bottom of the foundation pit, the reliability of the staircase under different soil conditions is ensured, the whole design avoids internal stress increase, the installation process is simplified, and the staircase is suitable for variable construction environments.

Description

Technical Field

[0001] The utility model relates to the technical field of stairs, in particular to a steel structure staircase that can be reinforced and connected to a foundation pit. Background Technique

[0002] Foundation pit engineering is very common in infrastructure construction such as buildings, bridges, and tunnels. In these projects, steel structure stairs are often used for temporary or permanent personnel passageways to facilitate the safe entry and exit of workers, maintenance personnel, and emergency rescue personnel. Steel structure stairs, also known as steel stairs, are made of common steel profiles. Steel structure stairs are favored because of their material properties (high strength, light weight, plasticity), their ability to withstand harsh weather and corrosive environments, and their ease of maintenance and cleaning to maintain their long-term performance and appearance. The high strength of steel allows for the design of thinner and lighter structures while maintaining the required load-bearing capacity.

[0003] The existing Chinese patent with the publication number CN219471392U discloses a reinforced steel structure staircase. The installation sleeves on the steel structure frame are arranged at equal distances and cooperate with vertical struts and diagonal struts to form a stable tread support structure. The cooperation of bumps and grooves restricts the position of the installation sleeve on the steel structure frame to prevent slipping and ensure the stability of the tread. The grid-shaped first reinforcing ribs and cross-shaped second reinforcing ribs at the bottom of the tread enhance the load-bearing capacity of the tread. The bolt connection method of the clamping plate and the fixing plate facilitates the disassembly and assembly of the installation sleeve and the replacement of structures such as the tread. However, due to the relatively harsh working conditions of the foundation pit, this solution still cannot avoid the safety risks caused by unstable connections such as falling, slipping, and displacement of the steel structure staircase.

[0004] In view of the above-related technologies, a steel structure staircase that can be reinforced and connected to a foundation pit is now provided, which can eliminate the drawbacks of the existing device. Content of the Utility Model

[0005] The purpose of the utility model is to provide a steel structure staircase that can be reinforced and connected to a foundation pit. By using this device for work, the problem of safety risks caused by unstable connections such as falling, slipping, and displacement of the steel structure staircase is solved.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A steel structure staircase that can be reinforced and connected to a foundation pit, including a steel frame, a platform board, a tread board, vertical struts, and diagonal struts. Platform boards are fixedly arranged at both the beginning and the end of the steel frame. A plurality of tread boards are clamped on the main body of the steel frame. A plurality of vertical struts are detachably connected to the outer walls on both sides of the main body of the steel frame. A plurality of diagonal struts are detachably connected between the steel frame and the vertical struts. A connection assembly is arranged on the platform board;

[0007] The connecting component includes a connecting column, a guiding key, a supporting plate, a taper pin and an extrusion and unfolding mechanism. A plurality of guiding keys distributed circumferentially are fixedly arranged at the top end of the connecting column. The bottom end of the connecting column is fixedly connected with a supporting plate. A plurality of taper pins are fixedly arranged at the bottom end of the supporting plate. The extrusion and unfolding mechanism is sleeved on the connecting column and is located between the guiding key and the supporting plate.

[0008] Preferably, the extrusion and unfolding mechanism includes a movable shaft seat, a positioning shaft seat, a first unfolding arm, a second unfolding arm and a damping spring. The movable shaft seat is slidably connected with the connecting column. The positioning shaft seat is sleeved on the connecting column and abuts against the supporting plate. One ends of a plurality of the first unfolding arms are rotatably connected to the movable shaft seat. A second unfolding arm is connected to the middle parts of the plurality of the first unfolding arms. Two ends of the plurality of the second unfolding arms are respectively rotatably connected to the first unfolding arms and the positioning shaft seat. The damping spring is sleeved on the connecting column and is located between the movable shaft seat and the positioning shaft seat.

[0009] Preferably, a supporting platform is sleeved on the connecting column. The cross section of the supporting platform is triangular. The supporting platform abuts against the supporting plate.

[0010] Preferably, a plurality of first clamping grooves are arranged at the end part of the movable shaft seat connected with the first unfolding arm. A plurality of second clamping grooves are arranged at the end part of the positioning shaft seat connected with the second unfolding arm.

[0011] Preferably, an elastic cushion layer is arranged at the part where the positioning shaft seat abuts against the supporting plate.

[0012] Preferably, a guiding groove adapted to the guiding key on the connecting column is correspondingly arranged on the platform plate.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] A steel structure staircase capable of being reinforced and connected to a foundation pit provided by the present utility model realizes a firm connection with the foundation pit by arranging a connecting component. The guiding key and the guiding groove of the connecting component ensure accurate installation and prevent structural deviation. When the staircase settles, the extrusion and unfolding mechanism is activated. The first unfolding arm and the second unfolding arm quickly unfold and grasp the soil, providing soil anchoring force. The synergistic effect of the damping spring and the supporting platform effectively controls the unfolding force of the unfolding arm and provides stable support at the same time. The supporting plate and the taper pin transfer the load to the bottom of the foundation pit, ensuring the reliability of the staircase under different soil conditions. The whole design avoids increasing internal stress, simplifies the installation process, improves the stability and safety of the staircase system, and is applicable to variable construction environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2Schematic structural diagram of the connection component of the present utility model;

[0017] Figure 3 Exploded structural diagram of the connection component of the present utility model;

[0018] Figure 4 Schematic structural diagram of the extrusion and deployment mechanism of the present utility model;

[0019] Figure 5 Exploded structural diagram A of the present utility model;

[0020] Figure 6 Schematic cross-sectional structure diagram of the support platform of the present utility model.

[0021] Figure 7 Schematic position diagram of the first card slot and the second card slot of the present utility model.

[0022] In the figure: 1. Steel frame; 11. Platform plate; 110. Guide groove; 12. Ladder plate; 13. Vertical strut; 14. Diagonal strut; 2. Connection component; 21. Connection column; 22. Guide key; 23. Support plate; 24. Tapered nail; 3. Extrusion and deployment mechanism; 31. Movable axle seat; 310. First card slot; 320. Second card slot; 32. Positioning axle seat; 33. First expansion arm; 34. Second expansion arm; 35. Damping spring; 4. Support platform. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] For a further understanding of the content of the present utility model, the present utility model will be described in detail in conjunction with the accompanying drawings.

[0025] Combined with Figures 1-7A steel structure staircase that can be reinforced and connected to a foundation pit comprises a steel frame 1, a platform plate 11, a staircase 12, vertical braces 13 and diagonal braces 14, the platform plates 11 are fixedly provided at the beginning and end of the steel frame 1, a plurality of staircases 12 are clamped on the main body of the steel frame 1, a plurality of vertical braces 13 are detachably connected to the outer walls on both sides of the main body of the steel frame 1, a plurality of diagonal braces 14 are detachably connected between the steel frame 1 and the vertical braces 13, this structural design provides main support for the stairs, ensures the stability and bearing capacity of the stairs, and the detachable connection design facilitates installation and transportation, a connecting component 2 is provided on the platform plate 11, and the combination of the connecting component 2 and the platform plate 11 provides an anchor point connected to the foundation pit, thereby enhancing the connection stability of the stairs and the foundation pit.

[0026] The connecting assembly 2 includes a connecting column 21, a guide key 22, a support plate 23, a cone nail 24 and an extrusion and expansion mechanism 3. The top of the connecting column 21 is fixedly provided with a plurality of guide keys 22 distributed in a circumference, which helps to ensure that the connecting column can be correctly aligned and fixed in a preset direction when inserted into the foundation pit, thereby preventing displacement during the installation process. The bottom end of the connecting column 21 is fixedly connected with a support plate 23, and the bottom end of the support plate 23 is fixedly provided with a plurality of cone nails 24. The support plate 23 provides a stable base, and the cone nails 24 are inserted into the soil of the foundation pit to provide a firm support for the stairs. The extrusion and expansion mechanism 3 is sleeved on the connecting column 21 and is located between the guide key 22 and the support plate 23. A support platform 4 is sleeved on the connecting column 21. The cross-section of the support platform 4 is triangular, and the support platform 4 abuts against the support plate 23. The stability of the triangle provides a stronger supporting force, thereby ensuring the stability of the connecting column 21 when subjected to force, and at the same time, the abutment with the support plate 23 provides a solid foundation.

[0027] The extrusion and deployment mechanism 3 includes a movable shaft seat 31, a positioning shaft seat 32, a first deployment arm 33, a second deployment arm 34, and a damping spring 35. The movable shaft seat 31 is slidably connected to the connecting column 21. The positioning shaft seat 32 is sleeved on the connecting column 21 and abuts against the support plate 23. An elastic cushion layer is provided at the portion where the positioning shaft seat 32 abuts against the support plate 23. The elastic cushion layer provides a buffering effect, absorbs the impacts and vibrations that may occur during the use of the staircase, and extends the service life of the structure. One ends of multiple first deployment arms 33 are rotatably connected to the movable shaft seat 31. A second deployment arm 34 is connected to the middle of multiple first deployment arms 33. Both ends of multiple second deployment arms 34 are respectively rotatably connected to the first deployment arms 33 and the positioning shaft seat 32. Multiple first card slots 310 are provided at the end of the movable shaft seat 31 where it is connected to the first deployment arm 33. Multiple second card slots 320 are provided at the end of the positioning shaft seat 32 where it is connected to the second deployment arm 34. The design of the card slots allows the deployment arms to be accurately positioned during deployment, provides adjustable connection points to adapt to foundation pit environments with different depths. Through the coordinated action of the movable shaft seat 31, the positioning shaft seat 32, the first deployment arm 33, and the second deployment arm 34, rapid deployment is achieved, providing a soil grasping force similar to that of tree roots and enhancing the fixing stability of the staircase. The damping spring 35 is sleeved on the connecting column 21 and is located between the movable shaft seat 31 and the positioning shaft seat 32. The damping spring 35 provides an elastic force between the movable shaft seat 31 and the positioning shaft seat 32, which helps to control the deployment speed and force of the deployment arms, ensuring the structural stability and adapting to different soil conditions.

[0028] Corresponding guide grooves 110 adapted to the guide keys 22 on the connecting column 21 are provided on the platform plate 11. The guide grooves 110 ensure the correct installation direction and position of the connecting column 21, prevent structural offset or damage caused by improper installation, and improve the accuracy and reliability of installation.

[0029] Working principle: During the installation of the steel structure staircase, the steel frame 1 may settle due to its own weight and the action of upper loads. At this time, the guide grooves 110 on the platform plate 11 ensure the accurate installation position and fixed angle of the connecting component 2, preventing offset. The settlement of the steel frame 1 drives the platform plate 11 to move downward along the connecting column 21, triggering the extrusion and deployment mechanism 3, causing the movable shaft seat 31 to push the first deployment arm 33 and the second deployment arm 34 to deploy, firmly grasping the soil like tree roots. The damping spring 35 and the support platform 4 work together to not only limit the deployment range of the deployment arms but also provide the necessary stable support. The support plate 23 and the taper pins 24 effectively transfer the loads borne by the upper structure to the bottom of the foundation pit. This mechanism realizes the stable connection between the staircase and the foundation pit, enhances the stability and safety of the staircase, and at the same time avoids increasing the internal stress of the structure, ensuring the reliability of the entire staircase system.

[0030] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0031] 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 steel structure staircase capable of being reinforced and connected to a foundation pit, comprising a steel frame (1), a platform plate (11), a ladder plate (12), a vertical support rod (13) and an oblique support rod (14), wherein the platform plate (11) is fixedly provided at the beginning and end of the steel frame (1), a plurality of ladder plates (12) are clamped on the main body of the steel frame (1), a plurality of vertical support rods (13) are detachably connected to the outer walls on both sides of the main body of the steel frame (1), and a plurality of oblique support rods (14) are detachably connected between the steel frame (1) and the vertical support rods (13), characterized in that: The platform plate (11) is provided with a connection assembly (2); The connection assembly (2) comprises a connection column (21), a guide key (22), a support plate (23), a cone nail (24) and an extrusion and expansion mechanism (3); a plurality of guide keys (22) distributed in a circumferential manner are fixedly provided on the top end of the connection column (21); a support plate (23) is fixedly connected to the bottom end of the connection column (21); a plurality of cone nails (24) are fixedly provided on the bottom end of the support plate (23); and the extrusion and expansion mechanism (3) is sleeved on the connection column (21) and is located between the guide key (22) and the support plate (23).

2. A steel structure staircase capable of being reinforced and connected to a foundation pit according to claim 1, characterized in that: The extrusion and expansion mechanism (3) comprises a movable shaft seat (31), a positioning shaft seat (32), a first extension arm (33), a second extension arm (34), and a damping spring (35); the movable shaft seat (31) is slidably connected to the connecting column (21); the positioning shaft seat (32) is sleeved on the connecting column (21) and abuts against the support plate (23); one end of a plurality of the first extension arms (33) is rotatably connected to the movable shaft seat (31); the middle of the plurality of the first extension arms (33) is connected to the second extension arm (34); the two ends of the plurality of the second extension arms (34) are rotatably connected to the first extension arm (33) and the positioning shaft seat (32), respectively; the damping spring (35) is sleeved on the connecting column (21) and is located between the movable shaft seat (31) and the positioning shaft seat (32).

3. A steel structure staircase capable of being reinforced and connected to a foundation pit according to claim 1, characterized in that: A support platform (4) is sleeved on the connecting column (21); the cross section of the support platform (4) is triangular, and the support platform (4) abuts against the support plate (23).

4. A steel structure staircase capable of being reinforced and connected to a foundation pit according to claim 2, characterized in that: The end portion of the movable shaft seat (31) connected to the No. 1 extension arm (33) is provided with a plurality of No. 1 clamping grooves (310), and the end portion of the positioning shaft seat (32) connected to the No. 2 extension arm (34) is provided with a plurality of No. 2 clamping grooves (320).

5. The steel structure staircase capable of being reinforced and connected to a foundation pit according to claim 2, characterized in that: An elastic cushion layer is provided at the location where the positioning shaft seat (32) abuts against the support plate (23).

6. The steel structure staircase capable of being reinforced and connected to a foundation pit according to claim 1, characterized in that: The platform plate (11) is provided with a guide groove (110) corresponding to the guide key (22) on the connecting column (21).

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