Air door of mine air return duct

Abstract

The utility model discloses an air door of a mine return air duct, which belongs to the technical field of non-pressure air doors, solves the problems that the existing air door of the mine return air duct is short in service life and difficult to disassemble and assemble, and comprises a crank arm door leaf and a connecting door leaf which are connected through a locking bolt. Inclined pull reinforcing ribs and transverse lining ribs are arranged on the leeward sides of the crank arm door leaf and the connecting door leaf, a reinforcing rib plate is arranged at the joint of the crank arm door leaf and the outside, a connecting sleeve is arranged on the reinforcing rib plate, and connecting positioning cylinders are arranged on the windward sides of the crank arm door leaf and the connecting door leaf and are connected through Z-shaped pins. The utility model has the characteristics of strong bearing capacity, long service life and easiness in disassembly and assembly, and can adapt to complex working conditions of the mine return air duct.

Description

Technical Field

[0001] This utility model belongs to the field of pressureless air door technology, specifically relating to a mine return air duct air door. Background Technology

[0002] As mines continue to be mined deeper, underground ventilation systems become increasingly complex. Air doors, as crucial components of these systems, play a vital role in airflow regulation. The existing return airway doors are double-leaf, pressureless doors located in the return air connection passage. Frequent opening and closing of these doors due to the passage of production vehicles makes them prone to damage due to the low strength of the door's crank arm. Furthermore, the doors are heavy, making disassembly and reassembly difficult for maintenance personnel after damage, posing a safety risk within the effective working space. Utility Model Content

[0003] The purpose of this utility model is to provide a mine return air duct damper to solve the problems of short service life and difficulty in disassembling and assembling existing mine return air duct dampers.

[0004] The technical solution of this utility model is: a mine return air duct door, including a crank arm door leaf and a connecting door leaf. The crank arm door leaf and the connecting door leaf are connected by locking bolts. The leeward side of the crank arm door leaf and the connecting door leaf is provided with diagonal reinforcing ribs and horizontal ribs. The connection between the crank arm door leaf and the outside is provided with a reinforcing rib plate, and a connecting sleeve is provided on the reinforcing rib plate. The windward side of the crank arm door leaf and the connecting door leaf is provided with a connecting positioning cylinder, and the connecting positioning cylinder is connected by a Z-shaped pin.

[0005] Furthermore, multiple reinforcing ribs are provided under the reinforcing rib plate.

[0006] Furthermore, the connecting sleeve is connected to an external hydraulic drive component.

[0007] Furthermore, the diagonal bracing, transverse reinforcing bars, and reinforcing plates are all connected by welding.

[0008] Furthermore, the crank arm door leaf and connecting door leaf are made of 45# steel.

[0009] The beneficial effects of this utility model are as follows: This utility model has strong load-bearing capacity, long service life, and the ability to disassemble and assemble easily if the air door is damaged, adapting to the complex working conditions of mine return air ducts. It effectively solves the problems of short service life, large weight, and difficult disassembly and assembly of existing mine return air duct air doors, thus improving the practical application effect of this utility model.

[0010] This utility model also has the following beneficial effects:

[0011] 1. Improved wind pressure resistance: The diagonal reinforcing ribs and horizontal lining ribs on the leeward side form a mesh support structure, which can effectively disperse airflow pressure and reduce the risk of door deformation. It is especially suitable for high wind pressure mine return air duct scenarios, and improves the overall impact resistance of the air door.

[0012] 2. Optimized connection strength: Multiple reinforcing ribs added below the reinforcing rib plate, combined with welding process, significantly enhance the connection rigidity between the crank arm door leaf and the external structure, avoid the problem of breakage at the connection due to frequent opening and closing, and extend the service life of key parts.

[0013] 3. Automated control adaptation: The modular design of the connecting sleeve and external hydraulic drive components allows for seamless integration into the mine's intelligent ventilation control system, enabling automated operation of the air door opening and closing, reducing manual intervention, improving the response efficiency of the ventilation system, and reducing the frequency of personnel working in high-risk areas.

[0014] 4. Installation accuracy and maintenance efficiency: The connecting positioning cylinder on the windward side is quickly positioned and connected by Z-shaped pins, which not only ensures the sealing of the door when it is closed, but also allows for quick separation of the crank arm door and the connecting door during maintenance by disassembling the Z-shaped pins and locking bolts. Partial disassembly can be completed by a single person, which greatly shortens maintenance time and reduces safety risks.

[0015] 5. Synergistic effect of materials and processes: 45# steel is used as the base material of the door leaf, combined with the full welding process (diagonal reinforcing ribs, horizontal ribs, and reinforcing rib plates are all welded), so that the air door has both high strength and wear resistance, which can resist the erosion of complex environments such as dust and moisture in the mine return air duct, and reduce the structural deterioration problem caused by rust. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the leeward side structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the windward side structure of this utility model.

[0018] In the diagram: 1-Crank arm door leaf; 2-Connecting door leaf; 3-Locking bolt; 4-Diagonal bracing rib; 5-Horizontal rib; 6-Reinforcing rib plate; 7-Connecting sleeve; 8-Connecting positioning cylinder; 9-Z-pin. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1-2As shown, a mine return air duct door includes a crank arm door leaf 1 and a connecting door leaf 2. The crank arm door leaf 1 and the connecting door leaf 2 are connected by locking bolts 3. The leeward side of the crank arm door leaf 1 and the connecting door leaf 2 is provided with diagonal reinforcing ribs 4 and horizontal reinforcing ribs 5. The connection between the crank arm door leaf 1 and the outside is provided with a reinforcing rib plate 6. The reinforcing rib plate 6 is provided with a connecting sleeve 7. The windward side of the crank arm door leaf 1 and the connecting door leaf 2 is provided with a connecting positioning cylinder 8. The connecting positioning cylinder 8 is connected by Z-shaped pins 9.

[0021] Multiple reinforcing ribs are provided under the reinforcing rib plate 6. The connecting sleeve 7 is connected to the external hydraulic drive component. The diagonal reinforcing rib 4, the horizontal rib 5, and the reinforcing rib plate 6 are all welded together. The crank arm door leaf 1 and the connecting door leaf 2 are made of 45# steel.

[0022] In practical applications, the installation and operation procedures for this damper are as follows:

[0023] 1. Pre-assembly and positioning: First, pre-connect the crank arm door leaf 1 and the connecting door leaf 2 with locking bolts 3, and adjust the angle of the two to the designed opening and closing state to ensure that the diagonal bracing 4 and the horizontal lining 5 on the leeward side form a complete support network.

[0024] Install a door frame at a predetermined position on the wall of the mine return air duct, connect the reinforcing rib plate 6 of the crank arm door leaf 1 to the piston rod of the external hydraulic drive device through the connecting sleeve 7, and fix the connecting sleeve 7 with bolts to ensure that the hydraulic drive force can be directly transmitted to the crank arm door leaf 1.

[0025] 2. Quick connection of the windward side: Align the crank arm door leaf 1 with the windward side connecting positioning cylinder 8 of the connecting door leaf 2, insert the Z-shaped pin 9 and rotate 90° to lock it, forming a rigid connection structure, ensuring that the windward side is subjected to uniform force when the door is closed and the sealing performance meets the standards.

[0026] 3. Automated commissioning: Connect to the mine hydraulic control system and set the door opening and closing logic (such as linkage with the transport vehicle sensors). When the hydraulic system drives the crank arm door 1 to open, the connecting door 2 rotates synchronously through the locking bolt 3, and the Z-shaped pin 9 slides with the positioning cylinder 8 to realize the linkage opening and closing of the double door.

[0027] 4. Maintenance and disassembly: When it is necessary to repair or replace parts, first disconnect the hydraulic system power, rotate the Z-pin 9 counterclockwise and pull it out to disconnect the windward connection; then remove the locking bolt 3, separate the crank arm door leaf 1 and the connecting door leaf 2, and the damaged parts can be hoisted to the ground for repair, avoiding complex operations in the narrow space underground.

[0028] Regularly inspect welded areas (such as the weld between the diagonal reinforcing rib 4 and the door leaf) for cracks, and use a torque wrench to check the preload of the locking bolt 3 to ensure reliable structural connections.

Claims

1. A mine return air duct door, characterized in that: It includes a crank arm door leaf (1) and a connecting door leaf (2). The crank arm door leaf (1) and the connecting door leaf (2) are connected by locking bolts (3). The leeward side of the crank arm door leaf (1) and the connecting door leaf (2) is provided with diagonal reinforcing ribs (4) and horizontal reinforcing ribs (5). The crank arm door leaf (1) is provided with a reinforcing rib plate (6) at the connection with the outside. The reinforcing rib plate (6) is provided with a connecting sleeve (7). The windward side of the crank arm door leaf (1) and the connecting door leaf (2) is provided with a connecting positioning cylinder (8). The connecting positioning cylinder (8) is connected by Z-shaped pins (9).

2. A mine return air duct door according to claim 1, characterized in that: The reinforcing rib plate (6) has multiple reinforcing ribs underneath.

3. A mine return air duct door according to claim 1 or 2, characterized in that: The connecting sleeve (7) is connected to the external hydraulic drive component.

4. A mine return air duct door according to claim 3, characterized in that: The diagonal reinforcing ribs (4), transverse reinforcing ribs (5), and reinforcing rib plates (6) are all connected by welding.

5. A mine return air duct door according to claim 4, characterized in that: The crank arm door leaf (1) and the connecting door leaf (2) are made of 45# steel.

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