Escape ladder stand for tunnel

Abstract

An escape ladder stand for a tunnel comprises a sliding frame, a sectional ladder and a supporting platform, the supporting platform is arranged on the tunnel wall and located below a temporary containing platform, the sliding frame comprises two sliding rails, the two sliding rails extend in the horizontal direction and are spaced by a distance, the inner end and the outer end of each sliding rail are bent upwards to be fixed to the temporary containing platform, and the sectional ladder is arranged on the sliding frame. Each sliding rail is provided with a first positioning section and a second positioning section, the first positioning sections are close to the inner ends of the sliding rails, the second positioning sections are close to the outer ends of the sliding rails, the sectional ladder comprises an upper-section ladder body and a lower-section ladder body, pulleys are arranged on the two sides of the top of the upper-section ladder body respectively and are matched with the corresponding sliding rails in a rolling mode, and rolling wheels are arranged at the bottom of the lower-section ladder body. The lower section ladder is arranged on the lower portion of the upper section ladder in a sliding fit mode through a key groove, and the escape ladder for the tunnel is formed by combining the lower section ladder and the upper section ladder. The device is simple in structure and convenient to use, does not occupy the space of a tunnel sidewalk when being spare, and meets the requirement of normal passage of pedestrians in a tunnel.

Description

Technical Field

[0001] This utility model relates to the field of municipal design, and in particular to an escape ladder for tunnels. Background Technology

[0002] Tunnels are engineering structures buried underground, representing a form of human utilization of underground space. Tunnels are typically located in low-lying areas, with a roadway in the middle and sidewalks on either side.

[0003] During heavy rainstorms, tunnels are prone to flooding due to inadequate drainage. To address this, temporary shelter platforms are typically installed above the pedestrian walkways inside tunnels to allow trapped individuals to await rescue. These temporary shelter platforms are equipped with fixed ladders, which are directly positioned on the pedestrian walkways, partially obstructing pedestrian access and hindering pedestrian movement.

[0004] Therefore, designing an escape ladder for temporary shelter platforms set up inside tunnels, while avoiding obstructing the sidewalk, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing an escape ladder for tunnels. This ladder has a simple structure, is easy to use, and can be used in idle conditions without occupying the tunnel's pedestrian walkway, thus meeting the needs of normal pedestrian passage in tunnels.

[0006] The technical solution of this utility model is: an escape ladder for tunnels, including a slide, a segmented ladder, and a support platform. The support platform is installed on the tunnel wall, located below a temporary holding platform. The slide includes two slide rails that extend horizontally and are spaced apart. The inner and outer ends of each slide rail are bent upwards and fixed to the temporary holding platform. Each slide rail is provided with a first positioning section and a second positioning section, with the first positioning section close to the inner end of the slide rail and the second positioning section close to the outer end of the slide rail. The segmented ladder includes an upper section and a lower section. The top two sides of the upper section are provided with pulleys that roll and engage with the corresponding slide rails. The bottom of the lower section is provided with rollers and supported on the support platform. The lower section slides and engages with the lower part of the upper section via a keyway, thus forming an escape ladder for tunnels.

[0007] The inner and outer ends of each slide rail are recessed downwards to form a semi-circular arc segment, which respectively form the first positioning segment and the second positioning segment.

[0008] The circles containing the first and second positioning segments correspond to the circle containing the pulley.

[0009] The lower section of the ladder is slidably fitted to the lower back of the upper section of the ladder via a keyway, and a buffer spring is provided between the upper and lower sections of the ladder.

[0010] There are two rollers, which are respectively set on both sides of the bottom of the lower section of the ladder.

[0011] The upper section of the staircase has two handles at the front bottom, located on both sides of the upper section of the staircase.

[0012] The above technical solution has the following beneficial effects:

[0013] 1. The tunnel escape ladder includes a slide frame, segmented ladders, and a support platform. The slide frame suspends and positions the segmented ladders, while the support platform supports the segmented ladders during off-peak hours, preventing them from occupying tunnel walkway space. The support platform is installed on the tunnel wall, below the temporary shelter platform, and does not occupy tunnel walkway space. The slide frame includes two horizontal rails with a gap between them. The inner and outer ends of each rail are curved upwards and fixed to the temporary shelter platform; that is, the two rails are fixed below the temporary shelter platform and extend along the width of the walkway. Each rail has a first positioning section and a second positioning section, with the first positioning section near the inner end of the rail and the second positioning section near the outer end. The segmented ladder includes an upper section and a lower section. The upper section is equipped with pulleys on both sides of its top, which roll and cooperate with the corresponding slide rails. That is, the upper section is suspended on the slide rails by the pulleys and slide rails to maintain the height of the upper section. The upper section can be positioned in the first positioning section, inside the slide frame, in a standby state when not in use, or in the second positioning section, outside the slide frame, in an emergency use state. The lower section of the ladder is equipped with rollers at its bottom and supported on a support platform. The lower section slides onto the lower part of the upper section via a keyway, forming an escape ladder for the tunnel. In idle standby mode, the lower section is supported on the support platform and overlaps with the upper section via a keyway, so that the entire segmented ladder does not occupy the pedestrian walkway space in idle standby mode. In case of emergency, trapped personnel pull the upper section outward and position it on the second positioning section, and pull the lower section out of the support platform. Under the action of gravity, the lower section slides down to be supported on the pedestrian walkway and overlaps with the lower part of the upper section via a keyway. Trapped personnel can climb to the temporary shelter platform for refuge via the lower and upper sections of the ladder.

[0014] 2. The inner and outer ends of each slide rail are recessed downwards to form a semi-circular arc segment, which respectively form the first positioning segment and the second positioning segment. The circles of the first positioning segment and the second positioning segment are adapted to the circles of the pulley. This matching structure has low processing cost, stable structure, and facilitates the movement of trapped personnel to the upper section of the ladder, while ensuring the positioning stability of the upper section of the ladder.

[0015] 3. The lower section of the ladder slides onto the back of the upper section of the ladder via a keyway, and a buffer spring is installed between the upper and lower sections of the ladder to prevent the lower section of the ladder from violently impacting the sidewalk when it is moved off the support platform in an emergency, thus ensuring safe use.

[0016] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details. Attached Figure Description

[0017] Figure 1 This is an installation diagram of the present invention;

[0018] Figure 2 This is a diagram showing the idle standby state of this utility model;

[0019] Figure 3 This is a schematic diagram illustrating the emergency deployment of this utility model;

[0020] Figure 4 This diagram illustrates the emergency use of this utility model.

[0021] In the attached diagram, 1 is the slide, 2 is the sectional ladder, 21 is the upper ladder, 22 is the lower ladder, 3 is the support platform, 4 is the slide rail, 41 is the first positioning section, 42 is the second positioning section, 5 is the pulley, 6 is the roller, 7 is the buffer spring, and 8 is the handle. Detailed Implementation

[0022] See Figures 1 to 4This is a specific embodiment of an escape ladder for tunnels. The escape ladder for tunnels includes a slide frame 1, a segmented ladder 2, and a support platform 3. The support platform 3 is installed on the tunnel wall, below the temporary shelter platform. Obviously, the temporary shelter platform is higher and located above the sidewalk, while the support platform is located above the inner side of the sidewalk and has a shorter extension length, so it does not interfere with pedestrians' normal passage on the sidewalk. The slide frame 1 includes two slide rails 4, which extend horizontally and are spaced apart. The inner and outer ends of each slide rail 4 are curved upwards and fixed to the temporary shelter platform. Each slide rail 4 is provided with a first positioning section 41 and a second positioning section 42, with the first positioning section 41 close to the inner end of the slide rail and the second positioning section 42 close to the outer end of the slide rail. Specifically, the inner and outer ends of each slide rail 4 are concave downwards in a semi-circular arc shape, forming the first positioning section 41 and the second positioning section 42, respectively. The segmented ladder 2 includes an upper ladder section 21 and a lower ladder section 22. The upper ladder section 21 has pulleys 5 on both sides of its top, which roll along corresponding slide rails 4. Specifically, the circles containing the pulleys 5 correspond to the circles containing the first positioning section 41 and the second positioning section 42. The lower ladder section 22 has rollers 6 at its bottom, which are supported on a support platform 3. In this embodiment, there are two rollers 6, respectively located on both sides of the bottom of the lower ladder section 22. The lower section 22 is slidably fitted to the lower part of the upper section 21 via a keyway, forming an escape ladder for the tunnel. In this embodiment, the lower section 22 is slidably fitted to the lower back of the upper section 21 via a keyway, and a buffer spring 7 is provided between the upper section 21 and the lower section 22. Specifically, a T-shaped key is provided on the lower back of the two vertical beams of the upper section, and an opening slot is provided on the front of the two vertical beams of the lower section. The lower section engages with the T-shaped key through the opening slot, so that the lower section and the upper section slide together along the length direction (height). Furthermore, for ease of transfer, a handle 8 is provided on the lower front of the upper section 21. There are two handles 8, located on both sides of the upper section 21.

[0023] The working principle of this utility model is as follows: In idle standby mode, the upper ladder is suspended on the first positioning section of the slide, and the lower ladder is supported on the support platform, without interfering with the sidewalk. In an emergency, trapped personnel can pull the upper ladder outward and position it on the second positioning section, and pull the lower ladder out of the support platform. Under the action of gravity, the lower ladder slides down and is supported on the sidewalk, and is connected to the lower part of the upper ladder by a keyway. Trapped personnel can climb to the temporary shelter platform via the lower and upper ladders to take refuge and wait for rescue.

Claims

1. An escape ladder for tunnels, characterized in that: It includes a carriage (1), a segmented ladder (2), and a support platform (3), wherein the support platform (3) is installed on the tunnel wall, located below the temporary accommodation platform. The carriage (1) includes two slide rails (4) that extend horizontally and are spaced apart. The inner and outer ends of each slide rail (4) are bent upwards and fixed to the temporary holding platform. Each slide rail (4) is provided with a first positioning section (41) and a second positioning section (42), with the first positioning section (41) close to the inner end of the slide rail and the second positioning section (42) close to the outer end of the slide rail. The segmented ladder (2) includes an upper ladder (21) and a lower ladder (22). The upper ladder (21) has pulleys (5) on both sides of its top, which roll and cooperate with the corresponding slide rails (4). The lower ladder (22) has rollers (6) at its bottom and is supported on a support platform (3). The lower ladder (22) is slidably fitted to the lower part of the upper ladder (21) through a keyway, and together they form an escape ladder for tunnels.

2. The tunnel escape ladder according to claim 1, characterized in that: The inner and outer ends of each slide rail (4) are recessed downwards to form a semi-circular arc segment, which respectively form the first positioning segment (41) and the second positioning segment (42).

3. The tunnel escape ladder according to claim 2, characterized in that: The circles containing the first positioning segment (41) and the second positioning segment (42) are compatible with the circle containing the pulley (5).

4. The tunnel escape ladder according to claim 1, characterized in that: The lower section of the ladder (22) is slidably fitted to the lower back of the upper section of the ladder (21) via a keyway, and a buffer spring (7) is provided between the upper section of the ladder (21) and the lower section of the ladder (22).

5. The tunnel escape ladder according to claim 1, characterized in that: There are two rollers (6), which are respectively set on both sides of the bottom of the lower step (22).

6. The tunnel escape ladder according to claim 1, characterized in that: The lower front of the upper staircase (21) is provided with two handles (8), which are located on both sides of the upper staircase (21).

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