A foldable pedestrian bridge for use in a coal mine underground

Abstract

The utility model discloses a kind of folding pedestrian bridges for coal mine underground, it is related to coal mine underground auxiliary device technical field.The purpose is to solve the problem of existing bridge and monorail vehicle interference, switching efficiency is low.It includes fixed step, bridge body platform, foldable platform and foldable step mechanism;Fixed step is fixedly connected with bridge body platform, foldable platform is hinged with bridge body platform by hinge, and is equipped with support rod and bolt locking;Foldable step mechanism contains triangular column and folding step assembly, and can be quickly folded or unfolded.The utility model can realize efficient switching without disassembly, save space after folding to avoid with monorail vehicle interference, realize pedestrian safe passage after unfolding, realize the efficient switching of pedestrian safe passage and barrier-free transport of monorail vehicle.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary devices for underground coal mines, specifically to a foldable pedestrian bridge. Background Technology

[0002] In underground coal mine roadways, pedestrian bridges are necessary to ensure the safety of personnel crossing conveyor belts. This is a required facility to meet the safety requirements for underground personnel passage as stipulated in the "Coal Mine Safety Regulations." Currently, commonly used pedestrian bridges in coal mines are mainly divided into two categories:

[0003] One type is the fixed pedestrian crossing, whose structure includes steps fixed to the ground, a horizontally fixed platform, and fixed steps connecting the platform to the ground on the other side. The entire structure is supported by rigid columns, and the components are rigidly connected by welding or bolts. Because of its fixed structure, this type of crossing cannot adjust its space occupancy. In scenarios with limited tunnel width (typically 3-5 meters in underground coal mine tunnels), the structure (such as steps and columns) near the monorail of the auxiliary transport system occupies 0.8-1.2 meters of lateral space on the side of the monorail vehicle. The width of the monorail transport vehicle is typically 1.2-1.8 meters, and it must maintain a safety distance of at least 0.6 meters from fixed facilities in the tunnel during operation. This results in the actual horizontal distance between the fixed crossing and the monorail vehicle often being less than 0.5 meters, making it highly susceptible to scraping. This can damage the guide wheels and cargo racks of the monorail vehicle, affecting cargo transport efficiency; in severe cases, it can cause the vehicle to derail, posing a serious threat to the lives of underground workers.

[0004] Another type is the existing improved detachable or simple folding bridge. Among them, the detachable bridge requires the platform to be separated from the steps by removing bolts. Each disassembly or installation requires 2-3 people to cooperate and takes 15-20 minutes. Frequent switching will seriously affect the production and transportation rhythm.

[0005] Therefore, there is a lack of pedestrian bridges in the existing technology that can be quickly switched (folded or unfolded without disassembly), and there is an urgent need to solve the above-mentioned safety and efficiency problems through structural improvements. Utility Model Content

[0006] To address the problems of interference and low switching efficiency between pedestrian bridges and monorail vehicles in existing coal mine technologies, this utility model provides a foldable pedestrian bridge for underground coal mines. By optimizing the folding structure design, it achieves efficient switching between safe pedestrian passage and barrier-free transportation by monorail vehicles.

[0007] This utility model is achieved through the following technical solution: a foldable pedestrian bridge for use in coal mines, the key technical points of which are: it includes fixed steps, a bridge platform, a foldable platform, and a foldable step mechanism; the upper part of the fixed steps is fixedly connected to one end of the bridge platform; the foldable platform is hinged to the other end of the bridge platform via hinges; support columns are fixedly installed at the four corners of the bottom of the bridge platform; support rods for supporting the foldable platform are hinged to the columns near the foldable platform; the foldable step mechanism is fixedly installed on one side of the column in the direction of the foldable platform; the foldable step mechanism includes a triangular prism for support and a foldable step assembly fixedly installed on the triangular prism; the foldable step assembly includes symmetrically arranged step supports, multiple connecting plates spaced apart inside the step supports, and step plates hinged between the connecting plates; the step support on the side adjacent to the triangular prism is fixedly connected to the triangular prism.

[0008] Furthermore, guardrails are provided on the fixed steps, bridge platform, foldable platform, and step supports.

[0009] Furthermore, the foldable platform and the support rod are provided with corresponding pin holes; the pin holes of the foldable platform and the support rod are provided with pins for connecting the foldable platform and the support rod.

[0010] The beneficial effects and features of this utility model are as follows:

[0011] Completely avoids interference with monorail vehicles and improves safety: This utility model, through the coordinated design of a foldable platform and a foldable step mechanism, reduces the lateral space occupied by the bridge near the monorail vehicle side from 1.0-1.2 meters in the unfolded state to 0.3-0.4 meters in the folded state. This is far less than the 0.6-meter safety distance required for monorail vehicle operation, completely avoiding the risk of scratches caused by space occupation in existing fixed bridges. At the same time, the folding platform is locked by pins and support rods, and the folding step assembly is limited by the damping of the hinges and the triangular prism, ensuring that it will not be accidentally unfolded due to tunnel vibration, airflow, etc. in the folded state, further ensuring the safety of monorail vehicle passage.

[0012] Achieving rapid switching and improving operational efficiency: Compared to existing detachable bridges that require 2-3 people to work together and take 15-20 minutes to disassemble or install, the folding or unfolding operation of this utility model can be completed by only 1 person. The operation steps are "pull out the pin - fold the platform - fold the steps" (or the reverse operation), and the whole process takes no more than 2 minutes, which greatly shortens the switching time between pedestrian passage and vehicle transportation and reduces the impact on the underground production rhythm. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the present invention in its unfolded state;

[0014] Figure 2 This is a three-dimensional schematic diagram of the folded state of this utility model.

[0015] The main components in the diagram are numbered as follows: 1. Fixed step; 2. Bridge platform; 201. Column; 301. Triangular column; 302. Step support; 303. Connecting plate; 304. Step plate; 4. Foldable platform; 401. Support rod.

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and the other drawings obtained are all within the protection scope claimed by this utility model. Detailed Implementation

[0017] The following combination Figure 1-2 The contents of this utility model will be described in detail through specific embodiments. Example

[0018] This foldable pedestrian bridge for use in coal mines includes: fixed steps 1, a bridge platform 2, a foldable platform 4, and a foldable step mechanism; the fixed steps are vertically welded to the ground foundation, and the upper part of the fixed steps is fixedly connected to one end of the bridge platform to form a rigid support structure; the foldable platform is hinged to the other end of the bridge platform, allowing it to be folded onto the bridge platform when not in use; support columns 201 are fixedly installed at the four corners of the bottom of the bridge platform; support rods 401 for supporting the foldable platform are hinged to the columns near the foldable platform; the foldable step mechanism is fixedly installed on one side of the column in the direction of the foldable platform; the foldable step mechanism includes a triangular prism 301 for support and a foldable step assembly fixedly installed on the triangular prism; the foldable step assembly includes symmetrically arranged step supports 302, multiple connecting plates 303 spaced apart inside the step supports, and step plates 304 hinged between the connecting plates; the step support on the side adjacent to the triangular prism is fixedly connected to the triangular prism.

[0019] To increase pedestrian safety when crossing the bridge, guardrails are installed on the fixed steps, bridge platform, foldable platform, and step supports.

[0020] To facilitate the installation and disassembly of the foldable platform and the support rod, corresponding pin holes are provided on the foldable platform and the support rod; the pin holes of the foldable platform and the support rod are provided with pins for connecting the foldable platform and the support rod.

[0021] To make the folding step assembly more stable in the unfolded state, a support column for reinforcement is fixedly installed at the bottom of the step bracket that is not connected to the triangular prism.

[0022] How to use this utility model:

[0023] To switch to the folded state (when the overhead rail vehicle is passing through), remove the pin and flip the foldable platform upwards onto the bridge platform; convert the foldable step assembly to the folded state, at which point the foldable platform is kept folded by the damping of the hinge itself.

[0024] To switch to the unfolded state (when pedestrians are passing through), flip the foldable platform downwards to a horizontal position, rotate the support rod to the support position, and insert the pin to connect and lock the foldable platform to the support rod; then switch the folding step assembly to the unfolded state.

Claims

1. A foldable pedestrian overcrossing for use in a coal mine, characterized by: The system includes fixed steps, a bridge platform, a foldable platform, and a foldable step mechanism. The upper part of the fixed steps is fixedly connected to one end of the bridge platform. The foldable platform is hinged to the other end of the bridge platform via hinges. Supporting columns are fixedly installed at the four corners of the bottom of the bridge platform. Support rods for supporting the foldable platform are hinged to the columns near the foldable platform. The foldable step mechanism is fixedly installed on one column in the direction of the foldable platform. The foldable step mechanism includes a triangular prism for support and a foldable step assembly fixedly installed on the triangular prism. The foldable step assembly includes symmetrically arranged step supports, multiple connecting plates spaced apart inside the step supports, and step plates hinged between the connecting plates. The step support adjacent to the triangular prism is fixedly connected to the triangular prism.

2. The folding pedestrian overcrossing for use in underground coal mines according to claim 1, characterized in that: Guardrails are installed on the fixed steps, bridge platform, foldable platform, and step supports.

3. The folding pedestrian overcrossing for use in underground coal mines according to claim 1, characterized in that: The foldable platform and the support rod are provided with corresponding pin holes; the pin holes of the foldable platform and the support rod are provided with pins for connecting the foldable platform and the support rod.

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