Mining air duct diverter driven by pneumatic motor

Abstract

The invention discloses a mining air duct diverter driven by a pneumatic motor, and relates to a device for changing the air flow direction and controlling the air volume when a fan supplies air to a driving working face when a coal mine drives a roadway, and at present, two methods for changing the direction of an air outlet of an air duct are provided: one is manual operation which is inconvenient and unsafe; 2, an air duct gate is driven to open and close through a motor, and the method has unsafe risks such as electric leakage and explosion; therefore, the air distributor device which is driven by the pneumatic motor and is used for controlling the air flow direction and the air volume is manufactured, and the air distributor device is safe and convenient.

Description

Technical Field

[0001] This invention relates to a device for changing the direction of airflow and controlling the air volume when a blower supplies air to the working face during operation in a coal mine tunnel. Background Technology

[0002] When tunneling underground in a coal mine, the tunnels are often blind tunnels. Therefore, it is necessary to use fans to supply air to the working face through ventilation ducts. The purpose is twofold: first, to provide fresh air to the workers; and second, to disperse harmful gases such as methane escaping from the strata, preventing the accumulation of harmful gases and potential hazards. However, different processes during tunneling require different directions and volumes of air supply, necessitating adjustments to the direction and volume of the ventilation duct outlets. Currently, there are two methods for changing the direction of the ventilation duct outlets: one is manual operation of the ventilation duct outlet gates, which is inconvenient and unsafe for workers because the ventilation ducts are suspended above the tunnel; the other is motor-driven opening and closing of the ventilation duct gates. This method requires a matching electrical control system, which poses safety risks such as electrical leakage and explosion hazards in the humid environment of underground coal mines. Furthermore, the ventilation ducts must move along with the tunnel excavation, making the movement of the motor-driven ventilation distributor very cumbersome. Summary of the Invention

[0003] The purpose of this invention is to provide a safe, convenient air distributor device that uses a pneumatic motor to control the direction and volume of airflow.

[0004] To achieve the above objectives, the technical solution adopted in this invention is as follows: First, a flow divider that uses a pneumatic motor to control the airflow direction and volume includes a three-pronged air duct with two air outlets. Each air outlet has four symmetrically mounted, openable blades. Each blade of the air outlet has a connecting rod hinged to the same sliding sleeve. The sliding sleeve is fitted onto the central frame of the air duct. The two sliding sleeves are respectively hinged to two racks of a gear and rack transmission device. The two racks are arranged at 90 degrees to each other. The running direction of the two racks is on the same center line as the sliding sleeves of the two air outlets. The two racks simultaneously mesh with the same gear, but in opposite directions. The gear is powered by a pneumatic motor. The drive mechanism rotates; when the pneumatic motor is operated, it drives the gear and rack device. One rack extends, causing the sliding sleeve hinged to it to move along the central frame towards the air outlet. The four blades hinged to the sliding sleeve via connecting rods rotate around their axis under its push, and the air outlet gradually opens. Simultaneously, the other rack of the gear and rack drive mechanism retracts, and the sliding sleeve hinged to it retracts along the central frame. The four connecting rods hinged to the sliding sleeve drive the four blades of the other air outlet to rotate around their axes and gradually close the air outlet, thus realizing the alternating opening and closing of the two air outlets.

[0005] Advantages of this invention: Simple structure and easy to operate; The control system requires only one pneumatic valve and no other complicated supporting facilities, making it easy to move. The air distributor offers flexible reversal and precise airflow control; The gas supply is sufficient and easy to connect. Attached Figure Description

[0006] Figure 1 The shape of the mine ventilation duct diverter driven by the pneumatic motor Figure 1 Figure 2 The shape of the mine ventilation duct diverter driven by the pneumatic motor Figure 2 Figure 3 Internal CC-direction cross-section of a pneumatic motor-driven mine ventilation duct distributor Figure 1 Figure 4 Internal DD section view of a pneumatic motor-driven mine ventilation duct distributor Figure 2 Implementation

[0007] This invention relates to a pneumatic motor-driven mine ventilation duct distributor, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, it includes a duct 1, a pneumatic motor 2, which is mounted on the outer shell of the duct 1. Shaft seats 3 are evenly distributed along the inner wall of the duct at 90° angles and welded to the duct 1 as a single unit. A fan shaft 4 is positioned within the hole of the shaft seat 3 and can rotate freely. Blades 5 can rotate freely around the axis of the fan shaft 4. Four blades 5 at outlet B and four blades 14 at outlet A are hinged to one end of connecting rod 12 and connecting rod 15, respectively. The other ends of rod 12 and connecting rod 15 are respectively hinged to sliding sleeves 11 and 16 fitted on the central frame 17. Sliding sleeves 11 and 16 can slide freely on the central frame 17. The other ends of sliding sleeves 11 and 16 are respectively hinged to racks 10 and 9 of the gear and rack transmission device 7. Racks 10 and 9 mesh with the same gear 8 of the gear and rack transmission device 7. The operation of gear 8 is driven by pneumatic motor 2 through transmission shaft 6.

[0008] The working process of the pneumatic motor driving the mine ventilation duct distributor is as follows: Operating the pneumatic motor 2 ( Figure 3 (In the middle) working, the pneumatic motor 2 is driven by the transmission shaft 6 ( Figure 4In the gear and rack transmission device 7, gear 8 rotates clockwise. Since racks 10 and 9 mesh with gear 8, gear 8 drives rack 10 towards the air outlet B. Rack 10 is hinged to sliding sleeve 11. Sliding sleeve 11, through connecting rods 12 connected to blades 5, pushes blades 5 to rotate around blade shaft 4, causing blades 5 on the air outlet B side to gradually open. Simultaneously, rack 9, driven by gear 8, moves away from air outlet A. Rack 9 is hinged to sliding sleeve 16. 16 is also hinged to the four blades 14 at the air outlet A end via the connecting rod 15, and drives the blades 14 to rotate around the blade axis 13. Thus, the blades 14 gradually close the air outlet A. By controlling the rotation of the pneumatic motor, i.e. the extension and retraction of the rack 9 and rack 10, the closing angle of the blades 14 and 5 at the air outlets A and B can be controlled, thereby controlling the ventilation volume of the air outlets A and B. By changing the rotation direction of the pneumatic motor 2, the air outlet A gradually opens and the air outlet B gradually closes.

Claims

1. A pneumatic motor-driven mine ventilation duct diverter, wherein four fan blades 14 and 15 are symmetrically installed on its two outlets, namely outlet A and outlet B. The fan blades are fixed on fan blade shafts 13 and 4. Fan blade shafts 13 and 4 are respectively positioned in the shaft holes of the shaft seat 3 of the ventilation duct 1. The fan blade shafts are perpendicular to the center line of the ventilation duct 1. Fan blades 14 and 5 are respectively hinged to sliding sleeves 11 and 16 by connecting rods 12 and 15. Sliding sleeves 16 and 11 are respectively hinged to racks 9 and 10 of the gear and rack transmission device 7. Racks 9 and 10 mesh with gears 8 at the same time. When the pneumatic motor 2 operates, it drives the gear 8 to rotate through the transmission shaft 6 (in Figure 3), thereby driving racks 9 and 10 to extend or retract alternately, realizing the opening or closing of outlet A and outlet B.

2. The pneumatic motor driven mine ventilation tube diverter of claim 1, wherein The pneumatic motor-driven mine ventilation duct diverter is driven by a pneumatic motor 2 and a gear and rack transmission device 7, realizing the alternating opening and closing function of a ventilation duct diverter with two air outlets.

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