A foldable multi-stage telescopic fire ladder

Abstract

This utility model relates to the field of fire rescue technology and discloses a foldable multi-stage telescopic fire ladder, including a bottom platform. Multiple sets of wheels are fixedly installed at the bottom of the bottom platform, and a telescopic rod is fixedly installed on one side of the top. A sleeve rod is fixedly installed on the other side of the top of the bottom platform away from the telescopic rod. A top platform is fixedly installed at the top of the sleeve rod. Two sets of first connecting blocks are fixedly installed on one side of the bottom of the top platform. A first telescopic ladder is rotatably installed inside the two sets of first connecting blocks. Two sets of slides are fixedly installed on the bottom side of the first telescopic ladder. A slider is slidably installed inside each set of slides. The two sets of sliders are fixedly connected by a second telescopic ladder. Two sets of second connecting blocks are fixedly installed on the upper surface of the bottom platform. This design allows for precise adjustment of the top platform height to meet the height requirements of different rescue scenarios, while providing ample operating space for firefighters and significantly improving the safety of the rescue process.

Description

Technical Field

[0001] This utility model relates to the field of fire rescue technology, specifically a folding multi-stage telescopic fire ladder. Background Technology

[0002] Fire escape staircases are dedicated passageways in buildings used for the safe evacuation of personnel or to assist firefighters in ascending rescue operations during emergencies such as fires. They are generally divided into two main categories: indoor fire escape staircases and outdoor fire escape staircases. Indoor fire escape staircases mainly refer to enclosed smoke-proof stairwells that meet fire protection standards and have fire-resistant structures to ensure unobstructed escape routes. Outdoor fire escape staircases are mostly externally mounted vertical or inclined ladders made of metal, commonly found on building exterior walls, allowing firefighters to quickly reach high-rise fire scenes or providing temporary escape routes for trapped personnel. Their design must strictly comply with national fire protection regulations, such as anti-slip steps, load-bearing capacity, conspicuous signage, and fire-resistant and corrosion-resistant treatments, to ensure reliable use in emergency situations. Some modern buildings are also equipped with motorized lifts assisted by electric fire truck ladders, further expanding rescue height and flexibility. As life-saving passageways, fire escape staircases must be kept unobstructed and regularly inspected, making them an indispensable hardware facility in building fire safety systems.

[0003] A search revealed that Chinese Patent Publication No. CN213627398U discloses a fire ladder. This device includes a primary fire ladder and a secondary fire ladder, and is equipped with a lifting device for raising the secondary fire ladder, which facilitates firefighters in raising the secondary fire ladder. It also allows firefighters to climb the fire ladder without carrying fire extinguishing equipment, thus facilitating firefighting operations. However, since the main body of the device consists of a primary fire ladder and a secondary fire ladder, during fire rescue operations, firefighters can only rescue trapped personnel by independently using the primary and secondary fire ladders, or by using ropes to wrap around the trapped body to ensure the safety of the trapped personnel. Furthermore, during fire rescue operations, firefighters mainly need to carry out rescue work and lack a certain degree of autonomy in protecting their own safety, thus failing to guarantee the safety of both firefighters and trapped personnel. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a foldable multi-stage telescopic fire ladder, which features precise adjustment of the top platform height to meet the height requirements of different rescue scenarios, enhances the practicality of the device, allows the fire ladder to function efficiently in various complex environments, provides ample operating space for firefighters, and can safely place trapped personnel during rescue operations, significantly improving the safety of the rescue process. This invention solves the aforementioned technical problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a foldable multi-stage telescopic fire ladder, comprising a bottom platform, with multiple sets of traveling wheels fixedly installed at the bottom end of the bottom platform, and a telescopic rod fixedly installed on one side of the top end. A sleeve rod is fixedly installed on the other side of the top end of the bottom platform away from the telescopic rod, and a top platform is fixedly installed at the top end of the sleeve rod. Two sets of first connecting blocks are fixedly installed on one side of the bottom end of the top platform, and a first telescopic ladder is rotatably installed inside the two sets of first connecting blocks. Two sets of slides are fixedly installed on the bottom side of the first telescopic ladder, and a slider is slidably installed inside each set of slides. The two sets of sliders are fixedly connected by a second telescopic ladder. Two sets of second connecting blocks are fixedly installed on the upper surface of the bottom platform.

[0006] As a preferred embodiment of this utility model, two sets of telescopic rods are arranged opposite each other, and the top ends of the two sets of telescopic rods are respectively fixedly connected to the two sides of the bottom end of the top platform.

[0007] Through the above technical solution, both sets of telescopic rods adopt HSL-50D double-stage hydraulic telescopic cylinders. When the telescopic rods are activated simultaneously, they extend and retract. Since the top of the telescopic rod is fixedly connected to the bottom of the top platform, when the telescopic rod extends and retracts, it drives the top platform to extend and retract as well, thereby achieving the effect of adjusting the height of the fire ladder and improving the practical performance of the fire ladder.

[0008] As a preferred embodiment of this utility model, the sleeve rod is composed of three slidably sleeved cylindrical rods.

[0009] With the above technical solution, when the telescopic rod drives the top platform to extend or retract, the three sliding sleeve rods extend or retract synchronously. Through the two sets of sleeve rods and the two sets of telescopic rods, four support points are formed at the bottom of the top platform, maintaining the stability of the top platform during height adjustment.

[0010] As a preferred technical solution of this utility model, a guardrail is fixedly installed at the top of the top platform. The guardrail consists of multiple sets of one-meter-high baffles and fixing plates fixed to the top of the multiple sets of baffles.

[0011] The above technical solution, consisting of multiple sets of one-meter-high baffles and fixed plates at the top of the baffles, provides firefighters with more operating space when the device is in use. At the same time, when firefighters use this device for fire rescue, trapped personnel can be placed directly inside the protective railing, increasing the safety of the rescue.

[0012] As a preferred technical solution of this utility model, the inner sides of the two sets of second connecting blocks are rotatably connected to the outer side of the bottom end of the second telescopic ladder.

[0013] With the above technical solution, while the height of the top platform is adjusted via the telescopic rod and the sleeve rod, the first telescopic ladder rotates inside the two sets of first connecting blocks, and the second telescopic ladder rotates inside the two sets of second connecting blocks. The first connecting blocks connect the first telescopic ladder to the top platform, allowing it to rotate freely around the connection point of the first connecting block. The second connecting blocks connect the second telescopic ladder to the bottom platform, similarly giving it the ability to rotate. When the top platform is raised, the first telescopic ladder will rotate downward around the first connecting block, and the second telescopic ladder will rotate upward around the second connecting block. Through such angle changes, the positional changes between the top platform and the bottom platform caused by height adjustment are adapted. At the same time, the slider slides inside the slide rail, allowing the first and second telescopic ladders to extend in length with height adjustment, thereby achieving the effect of adjusting the length of the climbing section through the first and second telescopic ladders.

[0014] Compared with the prior art, this utility model provides a foldable multi-stage telescopic fire ladder, which has the following beneficial effects:

[0015] 1. This utility model, through the coordinated operation of two sets of telescopic rods and two sets of sleeve rods, can not only precisely adjust the height of the top platform to meet the height requirements of different rescue scenarios, but also ensure the stability of the adjustment process through four support points, greatly improving the adaptability of the fire ladder. At the same time, the first telescopic ladder and the second telescopic ladder can change their length and angle synchronously with the height adjustment through the rotational cooperation of the connecting block and the sliding of the slider in the slide rail, so that the climbing path always adapts to the height change, further enhancing the practical performance of the device and allowing the fire ladder to play an efficient role in various complex environments.

[0016] 2. This utility model provides firefighters with ample operating space through the protective railing, and can also safely place trapped personnel during rescue, significantly improving the safety of the rescue process. In addition, the flexibility of height adjustment and the adaptability of climbing paths allow firefighters to quickly reach the designated location to carry out rescue work, reducing the waste of rescue time. At the same time, the stable structural design also reduces the risk of accidents during the rescue process, making the entire rescue operation more convenient and reliable, and laying a solid foundation for the smooth progress of fire rescue work. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a side view of the structure of this utility model;

[0019] Figure 3 This is an isometric side view of the structure of this utility model;

[0020] Figure 4This is a partially enlarged schematic diagram of the structure of this utility model.

[0021] The components are: 1. Bottom platform; 2. Walking wheels; 3. Telescopic pole; 4. Sleeve pole; 5. Top platform; 6. Guardrail; 7. First connecting block; 8. First telescopic ladder; 9. Slide rail; 10. Sliding block; 11. Second telescopic ladder; 12. Second connecting block. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Please see Figure 1-4 A foldable multi-stage telescopic fire ladder includes a bottom platform 1. Multiple sets of traveling wheels 2 are fixedly installed at the bottom end of the bottom platform 1, and a telescopic rod 3 is fixedly installed on one side of the top end. A sleeve rod 4 is fixedly installed on the other side of the top end of the bottom platform 1 away from the telescopic rod 3. A top platform 5 is fixedly installed at the top end of the sleeve rod 4. Two sets of first connecting blocks 7 are fixedly installed on one side of the bottom end of the top platform 5. A first telescopic ladder 8 is rotatably installed inside the two sets of first connecting blocks 7. Two sets of slide rails 9 are fixedly installed on the bottom side of the first telescopic ladder 8. A slider 10 is slidably installed inside each set of slide rails 9. The two sets of sliders 10 are fixedly connected by a second telescopic ladder 11. Two sets of second connecting blocks 12 are fixedly installed on the upper surface of the bottom platform 1.

[0026] Furthermore, both sets of telescopic rods 3 adopt HSL-50D dual-stage hydraulic telescopic cylinders. When the telescopic rods 3 are activated simultaneously, they extend and retract. Since the top end of the telescopic rod 3 is fixedly connected to the bottom end of the top platform 5, when the telescopic rod 3 extends and retracts, it drives the top platform 5 to extend and retract, thereby achieving the effect of adjusting the height of the fire ladder and improving the practicality of the fire ladder.

[0027] Furthermore, when the telescopic rod 3 drives the top platform 5 to extend or retract, the three sliding sleeve rods 4 extend or retract synchronously. Through the two sets of sleeve rods 4 and the two sets of telescopic rods 3, four support points are formed at the bottom of the top platform 5, maintaining the stability of the top platform 5 during height adjustment.

[0028] Furthermore, the protective railing 6, consisting of multiple sets of one-meter-high baffles and fixed plates at the top of the baffles, provides firefighters with more operating space when the device is in use. At the same time, when firefighters use this device for fire rescue, trapped personnel can be placed directly inside the protective railing 6, increasing the safety of the rescue.

[0029] Furthermore, while the height of the top platform 5 is adjusted via the telescopic rod 3 and the sleeve rod 4, the first telescopic ladder 8 rotates within the two sets of first connecting blocks 7, and the second telescopic ladder 11 rotates within the two sets of second connecting blocks 12. The first connecting blocks 7 connect the first telescopic ladder 8 to the top platform, allowing it to rotate freely around the connection point of the first connecting blocks 7. The second connecting blocks 12 connect the second telescopic ladder 11 to the bottom platform, similarly granting it rotational capability. When the top platform rises, the first telescopic ladder 8 rotates downward around the first connecting blocks 7, and the second telescopic ladder 11 rotates upward around the second connecting blocks 12. This angular change adapts to the positional change between the top platform 5 and the bottom platform 1 caused by height adjustment. Simultaneously, the slider 10 slides within the slide rail 9, allowing the first telescopic ladder 8 and the second telescopic ladder 11 to extend in length with height adjustment, thereby achieving the effect of length adjustment of the climbing section through the first telescopic ladder 8 and the second telescopic ladder 11.

[0030] In use, firstly, according to the desired height, activate the telescopic rod 3 to extend or retract. Since the top of the telescopic rod 3 is fixedly connected to the bottom of the top platform 5, when the telescopic rod 3 extends or retracts, it drives the top platform 5 to extend or retract as well. Simultaneously, the three slidingly connected sleeve rods 4 extend or retract synchronously. Through the two sets of sleeve rods 4 and the two sets of telescopic rods 3, four support points are formed at the bottom of the top platform 5, maintaining the stability of the top platform 5 during height adjustment. This achieves the effect of adjusting the height of the fire ladder, improving the practicality of the fire ladder. The first connecting block 7 and the second connecting block 12 are respectively connected to the first telescopic ladder 8, The rotating connection of the second telescopic ladder 11 allows the first telescopic ladder 8 and the second telescopic ladder 11 to adapt to positional changes while the height of the top platform is adjusted via the telescopic rod 3 and the sleeve rod 4. Simultaneously, the slider 10 slides inside the slide rail 9, causing the first telescopic ladder 8 and the second telescopic ladder 11 to extend with the height adjustment. This achieves the effect of adjusting the length of the climbing section through the first telescopic ladder 8 and the second telescopic ladder 11. The guardrail 6 provides firefighters with more operating space. At the same time, when firefighters conduct fire rescue using this device, trapped personnel can be placed directly inside the guardrail 6, increasing the safety of the rescue.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A folding multi-stage telescopic fire ladder, comprising a bottom platform (1), characterized in that: The bottom platform (1) has multiple sets of walking wheels (2) fixedly installed at its bottom end, and a telescopic rod (3) fixedly installed on one side of its top end. A sleeve rod (4) is fixedly installed on the other side of the top end of the bottom platform (1) away from the telescopic rod (3). A top platform (5) is fixedly installed on the top end of the sleeve rod (4). Two sets of first connecting blocks (7) are fixedly installed on one side of the bottom end of the top platform (5). A first telescopic ladder (8) is rotatably installed inside the two sets of first connecting blocks (7). Two sets of slides (9) are fixedly installed on the bottom side of the first telescopic ladder (8). A slider (10) is slidably installed inside each set of slides (9). The two sets of sliders (10) are fixedly connected by a second telescopic ladder (11). Two sets of second connecting blocks (12) are fixedly installed on the upper surface of the bottom platform (1).

2. The folding multi-section telescoping fire escape ladder of claim 1, wherein: Two sets of telescopic rods (3) are arranged opposite each other, and the top ends of the two sets of telescopic rods (3) are respectively fixedly connected to the two sides of the bottom end of the top platform (5).

3. The folding multi-section telescoping fire escape ladder of claim 2, wherein: The sleeve (4) consists of three slidingly connected cylindrical rods.

4. The folding multi-section telescoping fire escape ladder of claim 1, wherein: The top platform (5) is fixedly equipped with a guardrail (6), which consists of multiple sets of one-meter-high baffles and fixed plates fixed to the top of the multiple sets of baffles.

5. The folding multi-section telescoping fire escape ladder of claim 1, wherein: The inner sides of the two sets of second connecting blocks (12) are rotatably connected to the outer side of the bottom end of the second telescopic ladder (11).

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