Outdoor steel structure fire-fighting stair

Abstract

The utility model discloses an outdoor steel structure fire-fighting stair, which relates to the technical field of fire-fighting stairs and comprises a top steel plate and a steel frame, a plurality of connecting steel plates are welded on two sides of the steel frame, and a fire-fighting stair mechanism is welded at one end of each connecting steel plate. A connecting rod drives a rack plate to slide downwards along a supporting steel plate, so that a plurality of gear rods rotate, a plurality of step plates are turned downwards at the same time, and a scraping plate is tightly attached to the step plates while moving upwards along an arc-shaped plate, so that accumulated snow on the step plates is scraped at the same time, and the efficiency of removing the accumulated snow on the fire-fighting stairs is improved; and meanwhile, the situation that rain and snow freeze on the step plates for a long time, and consequently the step plates of the fire-fighting staircase are smooth can be avoided, when people in a community escape through the fire-fighting staircase, the situation that escape people step on the smooth step plates to fall down and tread is avoided, and therefore the fire-fighting staircase can be safely used.

Description

Technical Field

[0001] The utility model relates to the technical field of fire stairs, in particular to an outdoor steel structure fire stair. Background Technique

[0002] A steel structure fire stair is a stair made of general steel profiles. The joints of its components are connected by methods such as bolts, anchors, and welding. It is applicable to fire evacuation in factories, warehouses, or public buildings. This kind of stair has the advantages of light self-weight and small dimensional errors compared with reinforced concrete stairs. At the same time, the surface of the components needs to be coated with paint to prevent rust and fire. The forms of steel stairs are diverse. They can be used as fire evacuation stairs or as internal stairs of civil buildings in combination with other decorative finishing materials. During the design and installation process, the stability and safety of the stairs need to be fully considered, and relevant building standards and specifications need to be followed to ensure that the stairs can be integrated into the building environment and meet the fire safety requirements.

[0003] For example, Chinese Patent CN213296938U discloses an outdoor escape stair, including a building. Fire doors are respectively arranged on one side of the building. Stairwells are respectively arranged inside the fire doors. The edges of the first step, the second step, the first rest platform, and the second rest platform are fixedly connected to the guardrail by soldering.

[0004] However, in the prior art, the fire stairs in the community are generally installed on the outer side of the wall. When it snows, the snow accumulates on the step plates of the fire stairs and then freezes, resulting in the step plates of the fire stairs being relatively smooth. When a fire breaks out in the community on a snowy day and the people in the community need to escape through the fire stairs, it is easy for multiple escaping people to fall and trample on the step plates, which is not conducive to the safe use of the fire stairs. In view of the above problems, an outdoor steel structure fire stair is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems existing in the prior art, and a kind of outdoor steel structure fire stair is proposed.

[0006] To achieve the above object, the utility model adopts the following technical solutions: An outdoor steel structure fire escape, including a top steel plate and a steel frame. A plurality of connecting steel plates are welded on both sides of the steel frame. One end of the connecting steel plate is welded with a fire escape mechanism. The fire escape mechanism includes a rack plate, a limiting rod, a connecting rod, two supporting steel plates and a plurality of scraping plates. A plurality of step plates are evenly and rotatably installed on one side of the supporting steel plate. One end of the plurality of step plates is welded with a gear rod. The side of the rack plate is slidably installed on the inner side of the supporting steel plate, and the other side of the rack plate is meshed with the outer wall of the gear rod. One end of the limiting rod is welded with one end of the rack plate, and the other end of the limiting rod is welded with one end of the connecting rod. A threaded rod is threadedly connected inside the limiting rod. A plurality of arc-shaped plates are evenly welded on one side of the two supporting steel plates. A chute is opened inside the arc-shaped plate, and a spring is fixedly connected to one end of the chute. Both ends of the scraping plate are slidably installed on the arc-shaped plate through the chute, and one end of the spring is fixedly connected to one end of the scraping plate.

[0007] Preferably, the bottom wall of the scraping plate is attached to the top wall of the step plate, and a fixing plate is welded to the bottom of the arc-shaped plate.

[0008] Preferably, one end of the fixing plate is welded to one side of the supporting steel plate. One end of the supporting steel plate is welded with a mounting plate, and one end of the threaded rod is threadedly installed on one end of the mounting plate.

[0009] Preferably, guardrails are welded on the tops of the two supporting steel plates, and one end of the mounting plate is fixedly installed on one end of the connecting steel plate.

[0010] Preferably, one end of the two supporting steel plates is welded to one end of the connecting steel plate, and the top end of the steel frame is welded to the bottom of the top steel plate.

[0011] Preferably, a bottom steel plate is welded to the bottom end of the steel frame, and a telescopic staircase is fixedly installed at one end of the bottom steel plate.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are as follows:

[0013] 1. In the present utility model, by providing a fire escape staircase mechanism, first remove the threaded rod, push the connecting rod downward, the connecting rod drives the rack plate to slide downward along the support steel plate, thereby causing multiple gear rods to rotate, multiple step plates to simultaneously flip downward, and the scraping plate to move upward along the arc plate while closely adhering to the step plate, thereby simultaneously pushing and scraping the snow on the multiple step plates, completing the snow scraping work on the multiple step plates of the fire escape staircase mechanism, improving the efficiency of clearing the snow on the fire escape staircase, and at the same time avoiding the formation of ice on the step plates after rain and snow for a long time, which may cause the step plates of the fire escape staircase to be relatively smooth. When the residents in the community escape through the fire escape staircase, it can prevent the escapees from slipping and being trampled on the smooth step plates, thus enabling the safe use of the fire escape staircase.

[0014] 2. In the present utility model, by adding a telescopic staircase at the bottom of the steel frame, in the case of not being used usually, the telescopic staircase at the bottom can be pushed upward, thereby folding up the telescopic staircase upward, keeping the bottom of the fire escape staircase at a certain distance from the ground, preventing children in the community from climbing the fire escape staircase, enhancing the safety of the fire escape staircase, and at the same time avoiding the bottom of the steel structure fire escape staircase from being soaked by the accumulated water on the ground, extending the service life of the fire escape staircase. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structural schematic diagram of an outdoor steel structure fire escape staircase proposed by the present utility model;

[0016] Figure 2 is the structural schematic diagram of the telescopic staircase of an outdoor steel structure fire escape staircase proposed by the present utility model;

[0017] Figure 3 is the structural schematic diagram of the fire escape staircase mechanism of an outdoor steel structure fire escape staircase proposed by the present utility model;

[0018] Figure 4 is an outdoor steel structure fire escape staircase proposed by the present utility model Figure 3 detail enlarged view of part A;

[0019] Figure 5 is the side view of the fire escape staircase mechanism of an outdoor steel structure fire escape staircase proposed by the present utility model.

[0020] LEGEND DESCRIPTION: 1. Top steel plate; 2. Steel frame; 3. Fire escape staircase mechanism; 4. Connecting steel plate; 5. Telescopic staircase; 6. Bottom steel plate; 31. Guardrail; 32. Support steel plate; 33. Step plate; 34. Fixed plate; 35. Arc plate; 36. Gear rod; 37. Scraping plate; 38. Rack plate; 39. Limiting rod; 310. Connecting rod; 311. Mounting plate; 312. Threaded rod; 313. Chute; 314. Spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0023] Embodiment 1: As Figure 1 - Figure 5 shown, the present utility model provides an outdoor steel structure fire escape staircase, which includes a top steel plate 1 and a steel frame 2. A plurality of connecting steel plates 4 are welded on both sides of the steel frame 2. One end of the connecting steel plate 4 is welded with a fire escape staircase mechanism 3. The fire escape staircase mechanism 3 includes a rack plate 38, a limiting rod 39, a connecting rod 310, two support steel plates 32 and a plurality of scraping plates 37. A plurality of step plates 33 are evenly rotatably installed on one side of the support steel plate 32. One end of the plurality of step plates 33 is welded with a gear rod 36. One side of the rack plate 38 is slidably installed on the inner side of the support steel plate 32, and the other side of the rack plate 38 is meshed with the outer wall of the gear rod 36. One end of the limiting rod 39 is welded to one end of the rack plate 38, and the other end of the limiting rod 39 is welded to one end of the connecting rod 310. A threaded rod 312 is threadedly connected to the inner side of the limiting rod 39. A plurality of arc-shaped plates 35 are evenly welded on one side of the two support steel plates 32. A chute 313 is opened on the inner side of the arc-shaped plate 35, and one end of the chute 313 is fixedly connected with a spring 314. Both ends of the scraping plate 37 are slidably installed on the arc-shaped plate 35 through the chute 313. One end of the spring 314 is fixedly connected to one end of the scraping plate 37. The bottom wall of the scraping plate 37 is attached to the top wall of the step plate 33. The bottom of the arc-shaped plate 35 is welded with a fixing plate 34. One end of the fixing plate 34 is welded to one side of the support steel plate 32. One end of the support steel plate 32 is welded with a mounting plate 311. One end of the threaded rod 312 is threadedly installed on one end of the mounting plate 311. A guardrail 31 is welded on the top of the two support steel plates 32. One end of the mounting plate 311 is fixedly installed on one end of the connecting steel plate 4. One end of the two support steel plates 32 is welded to one end of the connecting steel plate 4.

[0024] The specific settings and functions of this embodiment will be described in detail below: Use tools to remove the threaded rod 312. The security personnel in the community hold the connecting rod 310 and push it downward. The connecting rod 310 drives the rack plate 38 to slide downward along the support steel plate 32, thereby causing multiple gear rods 36 to rotate. Multiple step plates 33 simultaneously flip downward. The bottom of the scraping plate 37 fits against the top wall of one end of the step plate 33. When the step plate 33 flips, the scraping plate 37 moves upward along the arc-shaped plate 35, and while the scraping plate 37 moves upward, it closely adheres to the step plate 33, thereby pushing the snow on the step plate 33 downward for scraping. The snow on multiple step plates 33 is simultaneously scraped off. At this time, the security personnel pull the connecting rod 310 upward again. The rack plate 38 drives the gear rod 36 to rotate, and multiple step plates 33 flip back to their original positions. Finally, use the threaded rod 312 to fix the limiting rod 39 on the mounting plate 311, thus completing the snow scraping work on multiple step plates 33 of the fire staircase mechanism 3, improving the efficiency of clearing the snow on the fire staircase, and at the same time, it can prevent rain and snow from freezing after staying on the step plate 33 for a long time, resulting in the fire staircase step plate 33 being relatively smooth, enabling the safe use of this fire staircase.

[0025] Embodiment 2: As Figure 1 and Figure 2 shown, the present utility model provides an outdoor steel structure fire staircase, including a top steel plate 1 and a steel frame 2. A plurality of connecting steel plates 4 are welded to both sides of the steel frame 2. One end of the connecting steel plate 4 is welded with a fire staircase mechanism 3. The top end of the steel frame 2 is welded to the bottom of the top steel plate 1. The bottom end of the steel frame 2 is welded with a bottom steel plate 6, and a telescopic staircase 5 is fixedly installed at one end of the bottom steel plate 6.

[0026] The effect achieved by the entire embodiment is that when it is not in use usually, the telescopic staircase 5 at the bottom end can be pushed upward, thereby stacking the telescopic staircase upward, making the bottom end of the fire staircase a certain distance away from the ground, preventing children in the community from climbing the fire staircase, enhancing the safety of this fire staircase, and at the same time, it can prevent the bottom end of the steel structure fire staircase from being soaked by ground water accumulation, improving the service life of this fire staircase.

[0027] Usage method and working principle of the device: The fire escape stairs are installed on the outer side of the wall. When it snows, after the snow accumulates on multiple steps 33 of the fire escape stairs and the snow stops, the security personnel in the community can timely remove the snow on multiple steps 33 of the fire escape stairs mechanism 3. First, use tools to remove the threaded rod 312. The security personnel in the community hold the connecting rod 310 and push it downward. The connecting rod 310 drives the rack plate 38 to slide downward along the support steel plate 32. One side of the rack plate 38 meshes with the gear rod 36, so that multiple gear rods 36 rotate, and multiple steps 33 simultaneously turn downward. The bottom of the scraping plate 37 fits against the top wall at one end of the step 33. When the step 33 turns, the scraping plate 37 moves upward along the arc plate 35, and the scraping plate 37 closely adheres to the step 33 while moving upward, so as to push and scrape the snow on the step 33 downward. The snow on multiple steps 33 is simultaneously scraped off. At this time, the security personnel pull the connecting rod 310 upward again. The rack plate 38 drives the gear rod 36 to rotate, and multiple steps 33 turn back to their original positions. Finally, use the threaded rod 312 to fix the limiting rod 39 on the mounting plate 311, thus completing the snow scraping work on multiple steps 33 of the fire escape stairs mechanism 3. It is not necessary for the security personnel in the community to remove the snow on multiple steps 33 individually, which improves the efficiency of removing the snow on the fire escape stairs. At the same time, it can avoid the formation of ice on the steps 33 after rain and snow for a long time, resulting in the steps 33 of the fire escape stairs being relatively smooth. When the people in the community escape through the fire escape stairs, it can prevent the escaping people from slipping and being trampled on the smooth steps 33, so that the fire escape stairs can be used safely.

[0028] The above is only a preferred embodiment of the present invention, and it does not limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. An outdoor steel structure fire fighting staircase, comprising a top steel plate (1) and a steel frame (2), wherein a plurality of connecting steel plates (4) are welded on both sides of the steel frame (2), characterized in that: A fire staircase mechanism (3) is welded to one end of the connecting steel plate (4), and the fire staircase mechanism (3) comprises a rack plate (38), a limit rod (39), a connecting rod (310), two supporting steel plates (32) and a plurality of scraper plates (37), a plurality of step plates (33) are evenly rotatably mounted on one side of the supporting steel plate (32), a gear rod (36) is welded to one end of the plurality of step plates (33), one side of the rack plate (38) is slidably mounted on the inner side of the supporting steel plate (32), and the other side of the rack plate (38) is meshed with the outer wall of the gear rod (36), and one end of the limit rod (39) is meshed with the gear rod (36). One end of the strip plate (38) is welded, and the other end of the limiting rod (39) is welded to one end of the connecting rod (310); the inner side of the limiting rod (39) is threadedly connected to a threaded rod (312); a plurality of arc-shaped plates (35) are evenly welded to one side of the two supporting steel plates (32); a slide groove (313) is provided on the inner side of the arc-shaped plate (35); and one end of the slide groove (313) is fixedly connected to a spring (314); both ends of the scraping plate (37) are slidably mounted on the arc-shaped plate (35) through the slide groove (313); and one end of the spring (314) is fixedly connected to one end of the scraping plate (37).

2. The outdoor steel structure fire fighting staircase according to claim 1 is characterized in that: The bottom wall of the scraping plate (37) is in contact with the top wall of the step plate (33), and the arc-shaped plate (35) drives a fixing plate (34) to be welded on the bottom.

3. The outdoor steel structure fire fighting staircase according to claim 2 is characterized in that: One end of the fixing plate (34) is welded to one side of the supporting steel plate (32), one end of the supporting steel plate (32) is welded to a mounting plate (311), and one end of the threaded rod (312) is threadedly mounted to one end of the mounting plate (311).

4. The outdoor steel structure fire fighting staircase according to claim 3 is characterized in that: Guardrails (31) are welded to the tops of the two supporting steel plates (32), and one end of the mounting plate (311) is fixedly mounted to one end of the connecting steel plate (4).

5. The outdoor steel structure fire fighting staircase according to claim 1 is characterized in that: One end of the two supporting steel plates (32) is welded to one end of the connecting steel plate (4), and the top end of the steel frame (2) is welded to the bottom end of the top steel plate (1).

6. The outdoor steel structure fire fighting staircase according to claim 1 is characterized by: A bottom steel plate (6) is welded to the bottom end of the steel frame (2), and a retractable staircase (5) is fixedly mounted on one end of the bottom steel plate (6).

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