Dual-drive device system for air door of main ventilator on ground of coal mine

Abstract

The utility model relates to a coal mine ground main ventilator air door dual-drive device system which comprises a main air door drive device and further comprises an auxiliary drive device, and the auxiliary drive device comprises a fixing base, an auxiliary motor, a transmission sleeve and a belt transmission mechanism. The transmission sleeve penetrates through and is rotatably mounted in a rotating seat, a driver is mounted on the fixed seat, one end of the transmission sleeve movably sleeves a driving shaft of the auxiliary motor, and spline teeth are formed at the other end of the transmission sleeve; the belt transmission mechanism comprises a driving belt wheel and a driven belt wheel, the center of the driven belt wheel is connected with the end of the hand wheel rotating shaft, a driving shaft is formed in the center of the driving belt wheel and rotationally connected with the belt wheel support, and the end face of the driving shaft is concavely provided with an insertion opening matched with the end of the transmission sleeve in an inserted mode. A spline groove meshed with the spline teeth is formed in the inner wall of the inserting opening. When the main air door driving device fails, the auxiliary motor is used for driving the hand wheel to open and close the air door, and potential safety accidents are effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining ventilation equipment, in particular to a main ventilation fan damper double driving device system on the ground of a coal mine. Background Art

[0002] At present, the dampers of the main ventilation fans on the ground of coal mines are all driven by valve electric devices. The valve electric devices have electric switching actions, can set the protection torque and display the damper status. The dampers can be controlled on-site or remotely and centrally.

[0003] However, the valve electric device is only equipped with one motor. When the motor breaks down or fails, it can only rely on the hand wheel. The operation is cumbersome, time-consuming and labor-intensive. When an emergency occurs, it cannot meet the requirements of rapid opening and closing, and there is a greater risk of safety accidents. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a dual drive device system for the dampers of the main ventilation fans on the ground of coal mines, which can ensure that the dampers can still be opened and closed quickly and effectively in the event of motor failure, thereby effectively preventing potential safety accidents and ensuring safe production in coal mines.

[0005] The utility model is realized through the following technical solutions:

[0006] Provided is a dual-drive system for the damper of a main ventilation fan on the ground of a coal mine, comprising a main damper drive device which can be driven and controlled by a main drive motor and a hand wheel to open and close the damper, and an auxiliary drive device which is connected to the rotating shaft of the hand wheel in a transmission manner, wherein the auxiliary drive device comprises a fixed seat and an auxiliary motor, a transmission sleeve and a belt transmission mechanism installed on the fixed seat;

[0007] The transmission sleeve penetrates and is rotatably installed in a rotating seat. A driver connected to the rotating seat and capable of driving the transmission sleeve to move forward and backward is installed on the fixed seat. One end of the transmission sleeve is movably sleeved on the driving shaft of the auxiliary motor, and the other end of the transmission sleeve is formed with spline teeth.

[0008] The belt drive mechanism includes a driving pulley and a driven pulley connected by a transmission belt. The center of the driven pulley is connected to the end of the rotating shaft of the handwheel. A driving shaft is formed at the center of the driving pulley. The driving shaft is rotatably connected to a pulley bracket installed on a fixed seat. The end surface of the driving shaft is recessed to form a socket that can be plugged into the end of the transmission sleeve, and the inner wall of the socket is formed with a spline groove that can mesh with the spline teeth.

[0009] Furthermore, the power end of the driver is connected with a rib plate through a screw rod and a nut, and the rib plate is connected to the rotating seat.

[0010] The driver is connected to the rib plate through a screw and a nut, the driver drives the rib plate to move, and the rib plate drives the rotating seat and the transmission sleeve to move synchronously, so as to realize the cutting off and connecting of power.

[0011] Furthermore, the driver is one of a hydraulic cylinder, a pneumatic cylinder or an electric telescopic rod.

[0012] The driver can select one of a hydraulic cylinder, a pneumatic cylinder or an electric telescopic rod, and utilizes the movement of the piston rod to control the movement of the transmission sleeve.

[0013] Furthermore, a keyway is provided on the peripheral surface of the driving shaft of the auxiliary motor along the length direction, and a strip-shaped key tooth which can be engaged with the keyway is formed on the inner wall of one end of the transmission sleeve corresponding to the auxiliary motor.

[0014] A keyway is recessed on the circumferential surface of the driving shaft of the auxiliary motor, and a strip-shaped key tooth corresponding to the keyway is formed on the inner wall of the transmission sleeve. The power transmission of the auxiliary motor is realized by engaging the key tooth with the keyway. At the same time, the strip-shaped key tooth slides in the keyway and cooperates with the driver to drive the transmission sleeve to move so as to cut off or connect the power transmission of the auxiliary motor.

[0015] Furthermore, each tooth of the spline teeth has a shape of a sharp and thin tooth in the front section and gradually transitions to a wide tooth in the rear section.

[0016] The spline teeth are formed from sharp to wide from front to back, which makes it easier to engage with the spline groove in the socket on the end face of the driving shaft.

[0017] Furthermore, a driven shaft is formed at the center of the driven pulley, a slot for plugging with the driven shaft is formed on the end face of the rotating shaft of the handwheel, a positioning groove is formed on the surface of the driven shaft, and a positioning block matching the positioning groove is convexly formed on the inner wall of the slot.

[0018] The driven pulley is plugged into the end of the rotating shaft of the handwheel through the driven shaft, and the positioning groove formed at the plugging position cooperates with the positioning plug block to ensure the power connection between the two after plugging, and it is also convenient for disassembly, installation and maintenance.

[0019] Furthermore, the distance that the driver drives the transmission sleeve to move toward the auxiliary motor is greater than the distance that the driver drives the transmission sleeve to move toward the driving pulley.

[0020] The sliding distance of the transmission sleeve in the keyway of the driving shaft of the auxiliary motor is greater than the moving distance of the other end of the transmission sleeve in the spline groove of the spline teeth in the active pulley, so that when the transmission sleeve cuts off the power between the auxiliary motor and the active pulley, it can always maintain a transmission connection with the driving shaft of the auxiliary motor without being separated from the driving shaft, thereby ensuring the stability of the next power connection.

[0021] Beneficial effects of the utility model:

[0022] By setting up an auxiliary motor, when the active drive mechanism fails, the driving shaft of the auxiliary motor is used to cooperate with the transmission sleeve and then the belt transmission mechanism is used to drive the rotating shaft of the handwheel to rotate, so as to realize the opening and closing operation of the damper. When the active drive mechanism is normal, the spline tooth end of the transmission sleeve is separated from the socket on the end face of the active shaft by the driver, so as to cut off the power of the auxiliary motor and the active pulley, thereby avoiding the mutual influence between the active drive mechanism and the auxiliary drive mechanism.

[0023] The utility model designs a backup solution, so that when a fault occurs, the damper can still be opened and closed quickly and effectively, thereby effectively preventing potential safety accidents and ensuring safe production in coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0025] Figure 2 It is an exploded diagram of the utility model.

[0026] Figure 3 for Figure 2 Right side stereogram of .

[0027] As shown in the figure:

[0028] 1. Auxiliary motor, 2. Driver, 3. Rib, 4. Screw and nut, 5. Transmission sleeve, 6. Pulley bracket, 7. Handwheel, 8. Active pulley, 9. Transmission belt, 10. Driven pulley, 11. Main damper drive device, 12. Main drive motor, 13. Fixed seat, 14. Rotating seat, 15. Spline teeth, 16. Active shaft, 17. Driven shaft, 18. Positioning groove, 19. Spline groove, 20. Keyway, 21. Strip key teeth, 22. Slot, 23. Positioning plug. DETAILED DESCRIPTION

[0029] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0030] A dual-drive system for the damper of a main ventilation fan on the ground of a coal mine includes a main damper drive device 11 which can be driven by a main drive motor 12 and a hand wheel 7 to control the opening and closing of the damper, and also includes an auxiliary drive device which is connected to the rotating shaft of the hand wheel 7, the auxiliary drive device includes a fixed seat 13 and an auxiliary motor 1, a transmission sleeve 5 and a belt transmission mechanism installed on the fixed seat 13.

[0031] The transmission sleeve 5 penetrates and is rotatably installed in a rotating seat 14. A driver 2 connected to the rotating seat 14 and capable of driving the transmission sleeve 5 to move forward and backward is installed on the fixed seat 13. The power end of the driver 2 is connected to a rib plate 3 through a screw and a nut 4, and the rib plate 3 is connected to the rotating seat 14. The driver 2 is one of a hydraulic cylinder, a pneumatic cylinder or an electric telescopic rod. In this embodiment, a hydraulic cylinder is selected. The distance that the driver 2 drives the transmission sleeve 5 to move toward the auxiliary motor 1 is greater than the distance that the driver 2 drives the transmission sleeve 5 to move toward the active pulley 8.

[0032] One end of the transmission sleeve 5 is movably sleeved on the driving shaft of the auxiliary motor 1, and the other end of the transmission sleeve 5 is formed with a spline tooth 15; a key slot 20 is provided on the peripheral surface of the driving shaft of the auxiliary motor 1 along the length direction, and a strip-shaped key tooth 21 that can be engaged with the key slot 20 is formed on the inner wall of one end of the transmission sleeve 5 corresponding to the auxiliary motor 1. The shape of each tooth of the spline tooth 19 is a sharp and thin tooth in the front section and gradually transitions to a wide tooth in the rear section.

[0033] The belt drive mechanism includes a driving pulley 8 and a driven pulley 10 which are connected by a transmission belt 9. The center of the driven pulley 10 is connected to the end of the rotating shaft of the handwheel 7. A driving shaft 16 is formed at the center of the driving pulley 8. The driving shaft 16 is rotatably connected to a pulley bracket 6 installed on a fixed seat 13. The end surface of the driving shaft 16 is recessed to form a socket that can be plugged into the end of the transmission sleeve 5, and the inner wall of the socket is formed with a spline groove 19 that can mesh with the spline teeth 15.

[0034] A driven shaft 17 is formed at the center of the driven pulley 10, and a slot for plugging with the driven shaft 17 is formed on the end face of the rotating shaft of the handwheel 7. A positioning groove 18 is formed on the surface of the driven shaft 17, and a positioning block 23 matching the positioning groove 18 is convexly formed on the inner wall of the slot 22.

[0035] The working process of this utility model:

[0036] When the main drive motor 12 in the main damper drive device 11 works normally, the damper is opened and closed by the main damper drive device 11. At this time, the transmission sleeve 5 is retracted by the piston rod of the hydraulic cylinder, driving the spline tooth end of the transmission sleeve 5 to be retracted and disconnected from the driving pulley 8. A margin is left between the auxiliary motor 1 and the transmission sleeve 5 through the keyway 20 and the bar key teeth 21, so that the two can slide relative to each other, and the transmission sleeve 5 and the driving pulley 8 can be freely connected and disconnected. The operation of the main damper drive device will not affect the auxiliary motor 1 and the hydraulic cylinder.

[0037] When the main drive motor 12 in the main damper drive device 11 fails or fails, the transmission sleeve 5 is extended through the piston rod of the hydraulic cylinder, driving one end of the transmission sleeve 5 to slide on the drive shaft of the auxiliary motor 1, and at the same time, the other end of the transmission sleeve 5 approaches the driving pulley 8 and is inserted into the spline groove 19 through the spline teeth 15 to complete the meshing connection. The end of the transmission sleeve 5 is designed with sharp and fine teeth in the front section gradually transitioning to wide teeth in the rear section, which is easier to mesh with the spline groove 19 on the end face of the driving shaft 16 at the center of the driving pulley 8. The other end of the transmission sleeve 5 is movably plugged and connected with the auxiliary motor 1. It can be relatively slidably connected with a margin, and the margin is greater than the connection distance between the spline tooth end of the transmission sleeve 5 and the driving pulley 8. Therefore, the transmission sleeve 5 will not be separated from the driving shaft of the auxiliary motor 1, and at the same time, the transmission sleeve 5 can transmit the power of the auxiliary motor 1 to the driving pulley 8. The auxiliary motor 1 is turned on, the driving pulley 8 rotates, and the driven pulley 10 is driven to rotate through the transmission belt 9. The driven pulley 10 is coaxial with the handwheel 7. The rotation of the driven pulley 10 can drive the handwheel 7 to rotate to open the damper. Compared with manually rotating the handwheel 7, the solution of the utility model is more labor-saving and shortens the opening time.

[0038] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A dual-drive system for the damper of a main ventilation fan on the ground of a coal mine, comprising a main damper drive device which can be driven and controlled by a main drive motor and a hand wheel to open and close the damper, characterized in that: It also includes an auxiliary drive device that is transmission-connected to the rotating shaft of the hand wheel, and the auxiliary drive device includes a fixed seat and an auxiliary motor, a transmission sleeve and a belt transmission mechanism installed on the fixed seat; The transmission sleeve penetrates and is rotatably installed in a rotating seat. A driver connected to the rotating seat and capable of driving the transmission sleeve to move forward and backward is installed on the fixed seat. One end of the transmission sleeve is movably sleeved on the driving shaft of the auxiliary motor, and the other end of the transmission sleeve is formed with spline teeth. The belt drive mechanism includes a driving pulley and a driven pulley connected by a transmission belt. The center of the driven pulley is connected to the end of the rotating shaft of the handwheel. A driving shaft is formed at the center of the driving pulley. The driving shaft is rotatably connected to a pulley bracket installed on a fixed seat. The end surface of the driving shaft is recessed to form a socket that can be plugged into the end of the transmission sleeve, and the inner wall of the socket is formed with a spline groove that can mesh with the spline teeth.

2. The dual drive device system for the main ventilation fan damper of the coal mine surface according to claim 1 is characterized in that: The power end of the driver is connected with a rib plate through a screw rod and a nut, and the rib plate is connected with a rotating seat.

3. The coal mine ground main ventilation fan damper dual drive device system according to claim 1 or 2, characterized in that: The driver is one of a hydraulic cylinder, a pneumatic cylinder or an electric telescopic rod.

4. The dual drive system of the main ventilation fan damper of the coal mine surface according to claim 1 is characterized in that: A keyway is provided on the peripheral surface of the driving shaft of the auxiliary motor along the length direction, and a strip-shaped key tooth which can be engaged with the keyway is formed on the inner wall of one end of the transmission sleeve corresponding to the auxiliary motor.

5. The dual drive system of the main ventilation fan damper on the ground of coal mine according to claim 1, characterized in that: The shape of each tooth of the spline teeth is a sharp and thin tooth in the front section and gradually transitions to a wide tooth in the rear section.

6. The dual drive device system for the main ventilation fan damper of the coal mine surface according to claim 1 is characterized in that: A driven shaft is formed at the center of the driven pulley, a slot for plugging with the driven shaft is formed on the end face of the rotating shaft of the handwheel, a positioning groove is formed on the surface of the driven shaft, and a positioning plug matching the positioning groove is convexly formed on the inner wall of the slot.

7. The dual drive device system for the main ventilation fan damper of the coal mine surface according to claim 1 is characterized in that: The distance that the driver drives the transmission sleeve to move toward the auxiliary motor is greater than the distance that the driver drives the transmission sleeve to move toward the driving pulley.

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