An automatic ventilation door for mining

Abstract

This invention relates to the field of mining equipment, and more particularly to an automatic mine ventilation door, comprising a gate frame, with curtain guide rails on both sides of the gate frame, a roller shutter compartment at the top of the gate frame, a roller shutter shaft inside the roller shutter compartment, a flexible roller shutter door panel wound around the roller shutter shaft, the flexible roller shutter door panel sliding along the curtain guide rails, a large bevel gear at one end of the roller shutter shaft, a vertically arranged small bevel gear meshing with one side of the large bevel gear, the small bevel gear being rotatably connected to a gear seat, the gear seat being fixed to the gate frame, and the lower end of the small bevel gear being poweredly connected to a dual-drive transmission assembly via a transmission shaft. The drive section of the ventilation door of this invention is located at the bottom of the system, a structure that facilitates personnel maintenance, and the dual-drive transmission system provides high safety.

Description

Technical Field

[0001] This invention relates to the field of mining equipment, and more particularly to an automatic ventilation door for mining. Background Technology

[0002] Mine ventilation doors are an important piece of equipment in the coal mining industry. They play a crucial role in mine ventilation systems, acting as air barriers to block airflow and provide ventilation for pedestrians and vehicles. Ventilation doors ensure that underground airflow follows a prescribed path, thereby maintaining air quality and the environment inside the mine, and ensuring the safety and health of miners.

[0003] The prior art Chinese invention patent with application number 202011512374.3 discloses a fully automatic rolling shutter-type air door system for mining. The drive part of the air door is located at the top of the system. This structure is not conducive to personnel maintenance. At the same time, the air door system does not have a manual emergency setting, and its safety is low. Summary of the Invention

[0004] Based on the above problems, the purpose of this invention is to provide an automatic ventilation door for mining. The invention adopts the following technical solution:

[0005] This invention provides an automatic ventilation door for mining, comprising a gate frame, curtain guide rails on both sides of the gate frame, a roller shutter compartment at the top of the gate frame, a roller shutter shaft in the roller shutter compartment, a flexible roller shutter door panel wound on the roller shutter shaft, the flexible roller shutter door panel sliding along the curtain guide rails, a large bevel gear at one end of the roller shutter shaft, a vertically arranged small bevel gear meshing with one side of the large bevel gear, the small bevel gear being rotatably connected to a gear seat, the gear seat being fixed to the gate frame, the lower end of the small bevel gear being poweredly connected to a dual-drive transmission assembly via a transmission shaft, the dual-drive transmission assembly being fixed to the gate frame; the dual-drive transmission assembly includes a transmission housing, in which a meshing worm shaft and a worm gear shaft are disposed, the ends of the worm shaft and the worm gear shaft both penetrating the transmission housing, one end of the worm shaft being connected to the transmission shaft, the other end of the worm shaft being provided with a roller shutter limiter, one end of the worm gear shaft being poweredly connected to a drive motor, and the other end of the worm gear shaft being provided with a handwheel.

[0006] Preferably, the roller shutter limiter includes a limiting housing, in which a lead screw is disposed. One end of the lead screw is connected to the turbine shaft, and two collision blocks are threadedly connected to the lead screw. The outer surfaces of the two collision blocks are provided with toothed grooves. Two micro switches are disposed at intervals on one side of the lead screw, and a guide plate is disposed on the other side of the lead screw. The two micro switches respectively contact and cooperate with the two collision blocks, and the guide plate slides and cooperates with the toothed grooves.

[0007] A rotating shaft is fixed on the guide plate. The rotating shaft is rotatably connected to the limiting housing. A torsion spring is provided on the rotating shaft. One end of the torsion spring abuts against the limiting housing, and the other end abuts against the guide plate.

[0008] Preferably, a door frame is provided on the outer side of the portal frame, and a groove is provided on the inner side of the door frame for embedding and cooperating with the portal frame. A plurality of elastic buffer members are provided in the groove, with one end of the elastic buffer member abutting against the door frame and the other end abutting against the portal frame.

[0009] Preferably, the elastic buffer is a spring, a first positioning protrusion is provided on the inner side of the groove, a second positioning protrusion is provided on the outer side of the gantry frame, and the two ends of the elastic buffer abut against the first positioning protrusion and the second positioning protrusion respectively.

[0010] Preferably, the door frame includes two columns, and a crossbeam is provided on the top of the two columns, the crossbeam being detachably connected to the columns.

[0011] Preferably, the system also includes a mine electrical control box, a mine air volume sensor, a mine wind speed sensor, and a mine gas sensor, wherein the mine air volume sensor, the mine wind speed sensor, the mine gas sensor, and the drive motor are all electrically connected to the controller in the mine electrical control box.

[0012] Preferably, the flexible roller shutter door panel is embedded with a plurality of horizontally arranged reinforcing bars.

[0013] Preferably, it also includes a transmission protective cover, which is disposed on the outside of the large bevel gear, the drive shaft and the dual-drive transmission assembly, and the transmission protective cover is fixed on the portal frame.

[0014] Preferably, the transmission protective cover has a detection window at a position corresponding to the dual-drive transmission assembly.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0016] The drive unit of the damper in this invention is located at the bottom of the system. This structure facilitates maintenance by personnel. At the same time, the damper system is equipped with dual drive transmission, which provides high safety. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the main structure of the automatic ventilation door for mining of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the automatic mine ventilation door of the present invention;

[0020] Figure 3 This is a schematic diagram of the dual-drive transmission assembly and roller shutter limiter of the present invention;

[0021] Figure 4 This is a schematic diagram of the installation of the elastic buffer component of the present invention;

[0022] Figure 5 This is a side view of the flexible roller shutter door panel of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 1. Door frame; 2. Door curtain guide rail; 3. Roller shutter compartment; 301. Roller shutter shaft; 4. Flexible roller shutter door panel; 401. Reinforcing rod; 5. Large bevel gear; 6. Small bevel gear; 601. Gear seat; 7. Drive shaft; 8. Dual-drive transmission assembly; 801. Transmission housing; 802. Worm shaft; 803. Worm gear shaft; 804. Drive motor; 805. Handwheel; 9. Roller shutter limiter; 901. Limiting housing; 902. Lead screw; 903. Collision... 904. Gear; 905. Microswitch; 906. Guide plate; 907. Rotating shaft; 908. Torsion spring; 10. Door frame; 1001. Column; 1002. Crossbeam; 11. Groove; 12. Elastic buffer; 13. First positioning protrusion; 14. Second positioning protrusion; 15. Mine electrical control box; 16. Mine air volume sensor; 17. Mine wind speed sensor; 18. Mine gas sensor; 19. Transmission protective cover; 1901. Detection window. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] like Figure 1 As shown, this embodiment discloses an automatic mine ventilation door, including a gate frame 1. Door curtain guide rails 2 are provided on both sides of the gate frame 1. A roller shutter compartment 3 is provided on the top of the gate frame 1. A roller shutter shaft 301 is provided in the roller shutter compartment 3. A flexible roller shutter door panel 4 is wound on the roller shutter shaft 301. The flexible roller shutter door panel 4 slides along the door curtain guide rails 2. A large bevel gear 5 is provided at one end of the roller shutter shaft 301. A vertically arranged small bevel gear 6 meshes with one side of the large bevel gear 5. The small bevel gear 6 is rotatably connected to a gear seat 601. The gear seat 601 is fixed on the gate frame 1. The lower end of the small bevel gear 6 is poweredly connected to a dual-drive transmission assembly 8 through a transmission shaft 7. The dual-drive transmission assembly 8 is fixed on the gate frame 1.

[0026] like Figure 2As shown, this embodiment also includes a transmission protective cover 19, which covers the outside of the large bevel gear 5, the drive shaft 7, and the dual-drive transmission assembly 8, and is fixed to the gantry frame 1. The transmission protective cover 19 has a detection window 1901 at a position corresponding to the dual-drive transmission assembly 8.

[0027] like Figure 2 As shown, in this embodiment, the dual-drive transmission assembly 8 includes a transmission housing 801, which is fixed to the gantry frame 1. A meshing turbine shaft 802 and a worm shaft 803 are disposed within the transmission housing 801. The ends of both the turbine shaft 802 and the worm shaft 803 penetrate the transmission housing 801. One end of the turbine shaft 802 is connected to the transmission shaft 7, and the other end of the turbine shaft 802 is provided with a roller shutter limiter 9. One end of the worm shaft 803 is powered by a drive motor 804, and the other end of the worm shaft 803 is provided with a handwheel 805. The turbine and worm shaft work together to achieve self-locking of the roller shutter shaft 301. Simultaneously, the dual-drive transmission assembly 8 can be operated via the handwheel 805 using the extended worm shaft 803, ensuring the safety of the damper system.

[0028] like Figure 3 As shown, the roller shutter limiter 9 is used to control the final position of the flexible roller shutter door panel 4. The roller shutter limiter 9 includes a limit housing 901, which is fixed on the door frame 1. A lead screw 902 is installed in the limit housing 901. One end of the lead screw 902 is connected to the turbine shaft 802. Two collision blocks 903 are threadedly connected to the lead screw 902. The outer surface of each collision block 903 is provided with a toothed groove 904. Two micro switches 905 are arranged at intervals on one side of the lead screw 902, and a guide plate 906 is provided on the other side of the lead screw 902. The two micro switches 905 respectively contact and cooperate with the two collision blocks 903, and the guide plate 906 slides and cooperates with the toothed groove 904. When the flexible roller shutter door panel 4 rises to the highest position (when it is in the retracted and open state), the collision block 903 at the top contacts the micro switch 905 at the top. At this time, the micro switch 905 feeds back an electrical signal to the controller, and the controller controls the drive motor 804 to stop. Similarly, when the flexible roller shutter door panel 4 descends to its lowest position (when it is in the closed state), the collision block 903 located below contacts the micro switch 905 located below. At this time, the micro switch 905 feeds back an electrical signal to the controller, and the controller controls the drive motor 804 to stop.

[0029] After prolonged use, the positions of the two collision blocks 903 in the roller shutter limiter 9 may shift, resulting in inaccurate engagement with the micro switch 905. In this case, adjustment of the collision blocks 903 is necessary. Before adjusting the collision blocks 903, the guide plate 906 typically needs to be disassembled. In this embodiment, to facilitate adjustment of the collision blocks 903, a rotating shaft 907 is fixed to the guide plate 906. The rotating shaft 907 is rotatably connected to the limiting housing 901. A torsion spring 908 is mounted on the rotating shaft 907, with one end abutting against the limiting housing 901 and the other end abutting against the guide plate 906. Under the action of the torsion spring 908, the guide plate 906 remains pressed against the collision blocks 903 and slides in engagement with the toothed groove 904 on the collision blocks 903. When the position of the collision blocks 903 needs adjustment, simply overturn the torsion spring and move the guide plate 906, disengaging it from the toothed groove 904.

[0030] When mine pressure and ground pressure are significant, it can cause door frame deformation, severely damaging the unpressurized air door, affecting underground air supply, and posing a significant safety hazard. To solve this problem, such as... Figure 1 and 4 As shown, a door frame 10 is provided on the outer side of the portal frame 1. A groove 11 is provided on the inner side of the door frame 10 for engaging with the portal frame 1. Multiple elastic buffers 12 are provided within the groove 11, with one end of each buffer abutting against the door frame 10 and the other end against the portal frame 1. The elastic buffer 12, positioned between the portal frame 1 and the door frame 10, reduces the impact of ground pressure on the damper through its expansion and contraction, thus protecting the normal operation of the pressureless damper.

[0031] In this embodiment, the elastic buffer 12 is a spring, a first positioning protrusion 13 is provided on the inner side of the groove 11, a second positioning protrusion 14 is provided on the outer side of the gantry frame 1, and the two ends of the elastic buffer 12 abut against the first positioning protrusion 13 and the second positioning protrusion 14 respectively.

[0032] In this embodiment, the door frame 10 includes two columns 1001, and a crossbeam 1002 is provided on the top of the two columns 1001. The crossbeam 1002 and the columns 1001 are disassembled and connected by a bolt assembly.

[0033] like Figure 1 As shown, this embodiment also includes a mine electrical control box 15, a mine air volume sensor 16, a mine wind speed sensor 17, and a mine gas sensor 18. The mine air volume sensor 16, mine wind speed sensor 17, mine gas sensor 18, and drive motor 804 are all electrically connected to the controller in the mine electrical control box 15. Through the cooperation of these multiple sensors, the airflow inside and outside the mine can be monitored in real time, and the opening and closing degree of the air dampers can be automatically adjusted according to different situations to ensure the optimal operating state of the mine ventilation system. This improves the efficiency of the ventilation system and effectively reduces the probability of mine accidents.

[0034] like Figure 5 As shown, in this embodiment, a plurality of horizontally arranged reinforcing rods 401 are embedded in the flexible roller shutter door panel 4. The reinforcing rods 401 can improve the strength of the flexible roller shutter door panel 4.

[0035] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. An automatic ventilation door for mining, characterized in that: The system includes a gantry frame (1), with curtain guide rails (2) on both sides of the gantry frame (1), a roller shutter compartment (3) on the top of the gantry frame (1), a roller shutter shaft (301) in the roller shutter compartment (3), a flexible roller shutter door panel (4) wound on the roller shutter shaft (301), the flexible roller shutter door panel (4) sliding along the curtain guide rails (2), a large bevel gear (5) on one end of the roller shutter shaft (301), a vertically arranged small bevel gear (6) meshing on one side of the large bevel gear (5), the small bevel gear (6) being rotatably connected to a gear seat (601), the gear seat (601) being fixed on the gantry frame (1), and the lower end of the small bevel gear (6) being poweredly connected to a dual-drive transmission assembly (8) via a transmission shaft (7), the dual-drive transmission assembly (8) being fixed on the gantry frame (1). The dual-drive transmission assembly (8) includes a transmission housing (801), in which a worm shaft (802) and a worm shaft (803) mesh with each other. The ends of the worm shaft (802) and the worm shaft (803) both penetrate the transmission housing (801). One end of the worm shaft (802) is connected to the transmission shaft (7), and the other end of the worm shaft (802) is provided with a roller shutter limiter (9). One end of the worm shaft (803) is poweredly connected to the drive motor (804), and the other end of the worm shaft (803) is provided with a handwheel (805). The roller shutter limiter (9) includes a limit housing (901), in which a lead screw (902) is provided. One end of the lead screw (902) is connected to the turbine shaft (802). Two collision blocks (903) are threaded onto the lead screw (902). The outer surfaces of the two collision blocks (903) are provided with toothed grooves (904). Two micro switches (905) are provided on one side of the lead screw (902) at intervals. A guide plate (906) is provided on the other side of the lead screw (902). The two micro switches (905) respectively contact and cooperate with the two collision blocks (903). The guide plate (906) slides and cooperates with the toothed grooves (904). A rotating shaft (907) is fixed on the guide plate (906). The rotating shaft (907) is rotatably connected to the limiting housing (901). A torsion spring (908) is provided on the rotating shaft (907). One end of the torsion spring (908) abuts against the limiting housing (901), and the other end abuts against the guide plate (906).

2. The automatic mine ventilation door according to claim 1, characterized in that: A door frame (10) is provided on the outer side of the portal frame (1). A groove (11) for fitting into the portal frame (1) is provided on the inner side of the door frame (10). A plurality of elastic buffers (12) are provided in the groove (11). One end of the elastic buffer (12) abuts against the door frame (10) and the other end abuts against the portal frame (1).

3. The automatic mine ventilation door according to claim 2, characterized in that: The elastic buffer (12) is a spring. A first positioning protrusion (13) is provided on the inner side of the groove (11), and a second positioning protrusion (14) is provided on the outer side of the gantry frame (1). The two ends of the elastic buffer (12) abut against the first positioning protrusion (13) and the second positioning protrusion (14) respectively.

4. The automatic mine ventilation door according to claim 2, characterized in that: The door frame (10) includes two columns (1001), and a crossbeam (1002) is provided on the top of the two columns (1001). The crossbeam (1002) is detachably connected to the columns (1001).

5. The automatic mine ventilation door according to claim 1, characterized in that: It also includes a mine electrical control box (15), a mine air volume sensor (16), a mine wind speed sensor (17), and a mine gas sensor (18). The mine air volume sensor (16), the mine wind speed sensor (17), the mine gas sensor (18), and the drive motor (804) are all electrically connected to the controller in the mine electrical control box (15).

6. The automatic mine ventilation door according to claim 1, characterized in that: The flexible roller shutter door panel (4) is embedded with multiple horizontally arranged reinforcing bars (401).

7. The automatic mine ventilation door according to claim 1, characterized in that: It also includes a transmission protective cover (19), which covers the outside of the large bevel gear (5), the transmission shaft (7) and the dual drive transmission assembly (8), and the transmission protective cover (19) is fixed on the gantry frame (1).

8. The automatic mine ventilation door according to claim 7, characterized in that: The transmission protective cover (19) is provided with a detection window (1901) at a position corresponding to the dual drive transmission assembly (8).

Images