Novel locking device of coal mine ventilation air door

Abstract

The utility model relates to the technical field of coal mine safety equipment, and discloses a novel coal mine ventilation air door locking device which comprises a door frame and further comprises a first wall body and a second wall body which are arranged on the two sides of the door frame, first square holes are formed in the first wall body and the second wall body, and lubricating mechanisms are arranged in the first square holes. A plurality of rotating shafts are fixedly connected to the two sides of the interior of the door frame, a first air door and a second air door are rotationally connected to the outer sides of the rotating shafts correspondingly, automatic opening and closing mechanisms are arranged on the outer sides of the first air door and the second air door, the lubricating mechanism comprises a hollow column, and the hollow column is fixedly connected to the interior of the first square hole. When the air door is completely opened, the push rod pushes the piston to extrude lubricating oil in the hollow column, and the lubricating oil is conveyed to the oil conveying pipe through the connecting pipe and sprayed on the rotating shaft to form a protective layer. When the air door is closed, the spring resets the piston, oil tank lubricating oil is sucked, preparation is made for next-time lubrication, and the rotating shaft is effectively prevented from rusting.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine safety equipment, in particular to a novel locking device for coal mine ventilation dampers. Background Art

[0002] In industrial and mine ventilation systems, dampers, as key control devices, are responsible for regulating airflow and maintaining stable ventilation. Their high-frequency opening and closing movements require long-term flexibility and operational stability. However, in complex and harsh working environments, the constant intrusion of dust, high levels of moisture, and corrosive media can easily lead to insufficient lubrication of the damper shaft, causing wear, rust, and seizures. This not only poses a direct threat to the proper functioning of the damper but can also reduce ventilation system efficiency and, in severe cases, even impact the safe operation of mines and industrial facilities.

[0003] Currently, traditional lubrication methods rely primarily on regular manual maintenance. However, this approach not only requires significant manpower and time, but can also reduce protective effectiveness due to uneven lubrication or excessively long maintenance intervals. Especially in scenarios where dampers operate frequently and in complex environments, manual lubrication cannot consistently meet the requirements for efficient and reliable operation.

[0004] For this reason, a new locking device for coal mine ventilation dampers is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a new locking device for coal mine ventilation dampers, aiming to improve the problems of easy rust or wear at the damper and door frame shaft and inconvenient opening and closing of the damper.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solution: a novel locking device for a coal mine ventilation damper, comprising a door frame, and further comprising a first wall and a second wall on both sides of the door frame, wherein a first square hole is formed inside each of the first wall and the second wall, a lubrication mechanism is provided inside the first square hole, a plurality of rotating shafts are fixedly connected to both sides of the door frame, a first damper and a second damper are rotatably connected to the outer sides of the rotating shafts, and an automatic opening and closing mechanism is provided on the outer sides of the first damper and the second damper;

[0007] The lubrication mechanism includes a hollow column, which is fixedly connected to the inside of the first square hole. The inside of the hollow column is connected to an oil tank through a hose. The side of the hollow column away from the oil tank is fixedly connected to a connecting pipe, and the outside of the connecting pipe is fixedly connected to multiple oil pipes. A spring is provided inside the hollow column, and a piston is slidably connected to the inside of the hollow column. The piston is fixedly connected to a push rod on the side close to the opening of the hollow column.

[0008] As a further description of the above technical solution:

[0009] The automatic opening and closing mechanism includes a second fixed plate, the outer side of the second fixed plate is fixedly connected to one side of the door frame, the top of the second fixed plate is rotatably connected to a hydraulic pump, the output end of the hydraulic pump is rotatably connected to a third connecting shaft, the bottom of the third connecting shaft is fixedly connected to a rotating rod, the outer side of the first damper is fixedly connected to the first fixed plate, the top of the first fixed plate is fixedly connected to the first connecting shaft, the outer side of the second damper is fixedly connected to an L-shaped plate, the top of the L-shaped plate is fixedly connected to the second connecting shaft, the rotating rod is rotatably connected to the outer side of the first connecting shaft at one end away from the L-shaped plate, and the rotating rod is rotatably connected to the outer side of the second connecting shaft at one end away from the first fixed plate.

[0010] As a further description of the above technical solution:

[0011] A first one-way valve is fixedly connected inside the hose, and an electromagnetic one-way valve is fixedly connected outside the connecting pipe.

[0012] As a further description of the above technical solution:

[0013] The outer side of the connecting pipe is fixedly connected to the inside of the wall, and each of the oil pipelines is arranged above a rotating shaft in a one-to-one correspondence.

[0014] As a further description of the above technical solution:

[0015] One end of the spring away from the top wall of the hollow column is fixedly connected to one side of the piston, and the other end of the spring away from the piston is in contact with the top wall of the hollow column.

[0016] As a further description of the above technical solution:

[0017] One end of one push rod away from the piston abuts against the outer side of the first damper, and the other end of the push rod away from the piston abuts against the outer side of the second damper.

[0018] As a further description of the above technical solution:

[0019] An oil inlet pipe is fixedly connected to the inside of the oil tank, and an outer side of the push rod is slidably connected to the inside of the hollow column.

[0020] As a further description of the above technical solution:

[0021] A second square hole is opened inside the second wall, and the outer side of the L-shaped plate is slidably connected to the inside of the second square hole.

[0022] The utility model has the following beneficial effects:

[0023] 1. In this utility model, when the damper is fully opened, it pushes the push rod, which in turn moves the piston, squeezing out the lubricating oil stored in the hollow column. This oil is then transported through the connecting pipe to the various oil pipes and evenly sprayed onto the rotating shaft, forming a protective layer. When the damper is closed, the spring returns the piston and simultaneously draws the lubricating oil from the oil tank into the hollow column, preparing it for lubrication when the damper is opened next time. This effectively prevents the rotating shaft from rusting due to long-term use, ensuring smooth opening and closing of the damper and long-lasting durability.

[0024] 2. In the present invention, by starting the hydraulic pump and utilizing the coordinated cooperation of the third connecting shaft, the rotating rod, the first connecting shaft and the second connecting shaft, the synchronous action of the first damper opening forward and the second damper opening backward is achieved, which effectively improves the work efficiency and greatly simplifies the opening and closing operation of the damper, making the whole process more convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a three-dimensional schematic diagram of the new locking device for coal mine ventilation dampers proposed in the utility model;

[0026] Figure 2 This is a schematic structural diagram of a cross section of a novel locking device for a coal mine ventilation damper proposed in the present invention;

[0027] Figure 3 for Figure 2 A magnified schematic diagram of point A in the middle;

[0028] Figure 4 This is a schematic structural diagram of the explosion of the lubrication mechanism of the new locking device for the ventilation damper of a coal mine proposed in the utility model;

[0029] Figure 5 for Figure 4 Enlarged schematic diagram of point B in the middle.

[0030] Legend:

[0031] 1. Wall 1; 2. First square hole; 3. Door frame; 4. First damper; 5. Wall 2; 6. Hydraulic pump; 7. Hollow column; 8. Second damper; 9. First fixed plate; 10. First connecting shaft; 11. Rotating rod; 12. L-shaped plate; 13. Second connecting shaft; 14. Second square hole; 15. Second fixed plate; 16. Rotating shaft; 17. Third connecting shaft; 18. Spring; 19. Solenoid check valve; 20. Connecting pipe; 21. Oil pipeline; 22. Push rod; 23. Piston; 24. First check valve; 25. Oil tank; 26. Oil inlet pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Reference Figure 1 - Figure 5 The utility model provides an embodiment of a novel locking device for a coal mine ventilation damper, comprising a door frame 3, and further comprising a wall 1 and a wall 2 5 on both sides of the door frame 3. A first square hole 2 is opened inside the wall 1 and the wall 2 5, and a lubrication mechanism is provided inside the first square hole 2. A plurality of rotating shafts 16 are fixedly connected to both sides of the door frame 3, and a first damper 4 and a second damper 8 are rotatably connected to the outer sides of the rotating shafts 16 respectively. An automatic opening and closing mechanism is provided on the outer sides of the first damper 4 and the second damper 8.

[0034] The lubrication mechanism includes a hollow column 7, which is fixedly connected to the first square hole 2. An oil tank 25 is connected to the hollow column 7 via a hose. A connecting pipe 20 is fixedly connected to the side of the hollow column 7 facing away from the oil tank 25. Multiple oil delivery pipes 21 are fixedly connected to the outer side of the connecting pipe 20. A spring 18 is installed inside the hollow column 7. A piston 23 is slidably connected to the hollow column 7. A push rod 22 is fixedly connected to the side of the piston 23 near the opening of the hollow column 7. The door frame 3 serves as the primary support structure for the first and second dampers 4 and 8. It is fixedly connected to the rotating shaft 16 and provides a stable mounting base. Wall 1 and Wall 2 5 secure the door frame 3, ensuring its stability. The first square hole 2 is defined within the wall, which houses the lubrication mechanism. The rotating shaft 16 connects and supports the first and second dampers 4 and 8, enabling the dampers to open and close. The hollow column 7 is the core component of the lubrication mechanism, installed within the first square hole 2 and housing components such as the piston 23 and spring 18. The oil tank 25 stores lubricating oil, which is supplied to the hollow column 7 via a hose. The connecting pipe 20 and the oil delivery pipe 21 distribute the lubricating oil from the hollow column 7 to the rotating shaft 16 for lubrication to reduce friction and component wear. The piston 23 slides to adjust the lubricating oil pressure inside the hollow column 7 and delivers the lubricating oil to the oil delivery pipe 21. When the push rod 22 is opened through the damper, it contacts the push rod 22 and pushes the push rod 22 to move the piston 23 to control the flow of the lubricating oil. The spring 18 is used to provide a reset force to ensure that the piston 23 can rebound to its initial position to maintain the normal operation of the lubrication system.

[0035] Reference Figure 1 、 Figure 3 and Figure 4The automatic opening and closing mechanism includes a second fixed plate 15, the outer side of the second fixed plate 15 is fixedly connected to one side of the door frame 3, the top of the second fixed plate 15 is rotatably connected to the hydraulic pump 6, the output end of the hydraulic pump 6 is rotatably connected to the third connecting shaft 17, the bottom of the third connecting shaft 17 is fixedly connected to the rotating rod 11, the outer side of the first damper 4 is fixedly connected to the first fixed plate 9, the top of the first fixed plate 9 is fixedly connected to the first connecting shaft 10, the outer side of the second damper 8 is fixedly connected to the L-shaped plate 12, the top of the L-shaped plate 12 is fixedly connected to the second connecting shaft 13, the end of the rotating rod 11 away from the L-shaped plate 12 is rotatably connected to the outside of the first connecting shaft 10, and the end of the rotating rod 11 away from the first fixed plate 9 is rotatably connected to the outside of the second connecting shaft 13. The second fixed plate 15 serves as an installation base for the hydraulic pump 6, fixing the hydraulic pump 6 to one side of the door frame 3 to provide stable support. The hydraulic pump 6 provides a power source and drives other components through hydraulic pressure to complete the automatic opening and closing operation of the damper. The rotating rod 11, the third connecting shaft 17, the first connecting shaft 10 and the second connecting shaft 13 work together to transmit the thrust generated by the hydraulic pump 6 to the first fixed plate 9 and the L-shaped plate 12, thereby controlling the opening and closing of the first damper 4 and the second damper 8.

[0036] Reference Figure 1 、 Figure 4 and Figure 5 A first one-way valve 24 is fixedly connected to the interior of the hose, and an electromagnetic one-way valve 19 is fixedly connected to the exterior of the connecting pipe 20. First one-way valve 24 controls the lubricating oil in oil tank 25 to only flow into hollow column 7, while electromagnetic one-way valve 19 controls the lubricating oil in hollow column 7 to only flow out. Electromagnetic one-way valve 19 is precisely controlled by a PLC control terminal, achieving timed on / off operation. For example, electromagnetic one-way valve 19 can be set to open once a month for 20 minutes each time, thereby precisely regulating the flow and distribution of lubricating oil.

[0037] Reference Figure 1 、 Figure 4 and Figure 5 The outer side of the connecting pipe 20 is fixedly connected to the inside of the wall 1, and each oil pipe 21 is arranged one by one above a rotating shaft 16. The oil pipe 21 is used to accurately deliver the lubricating oil in the connecting pipe 20 to the rotating shaft 16.

[0038] Reference Figure 1 、 Figure 3 、 Figure 4 and Figure 5 One end of a push rod 22 away from the piston 23 abuts against the outside of the first damper 4, and the other end of a push rod 22 away from the piston 23 abuts against the outside of the second damper 8. When the damper is fully opened, it pushes the push rod 22 to drive the piston 23 to move.

[0039] Reference Figure 1 、 Figure 4 and Figure 5An oil inlet pipe 26 is fixedly connected to the inside of the oil tank 25 , and the outer side of the push rod 22 is slidably connected to the inside of the hollow column 7 . The oil inlet pipe 26 is used to inject lubricating oil into the oil tank 25 .

[0040] Reference Figure 1 - Figure 3 A second square hole 14 is opened inside the wall 5, and the outer side of the L-shaped plate 12 is slidably connected to the inside of the second square hole 14. The second square hole 14 is used to ensure that the L-shaped plate 12 can rotate normally.

[0041] Working principle: When it is necessary to open the first damper 4 and the second damper 8, by starting the hydraulic pump 6, the hydraulic pump 6 will push the third connecting shaft 17 and rotate, so that the rotating rod 11 will rotate on the first connecting shaft 10 and the second connecting shaft 13, thereby transmitting force to the first fixed plate 9 and the L-shaped plate 12, so that the hydraulic pump 6 will rotate on the top of the second fixed plate 15. With the push of the hydraulic pump 6, the first damper 4 will gradually open to the front side, and the second damper 8 will open backward. When the first damper 4 and the second damper 8 are opened at ninety degrees relative to the door frame 3, they will push the push rods in the hollow columns 7 on the wall 1 and the wall 2 5. Rod 22, followed by the piston 23 sliding inside the hollow column 7, the spring 18 is compressed, so that the lubricating oil in the hollow column 7 will be transported to each oil pipe 21 through the electromagnetic one-way valve 19 and then through the connecting pipe 20, and the lubricating oil will eventually be sprayed onto each rotating shaft 16. When the first damper 4 and the second damper 8 are closed, the piston 23 is returned to its position under the action of the spring 18, and the lubricating oil in the oil tank 25 is sucked into the hollow column 7 through the hose, preparing for lubrication when the first damper 4 and the second damper 8 are opened next time, effectively preventing the rotating shaft 16 from rusting due to long-term use, and ensuring that the first damper 4 and the second damper 8 open and close smoothly and durable.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A novel locking device for a coal mine ventilation damper, comprising a door frame (3), characterized in that: It also includes a wall body (1) and a wall body (5) on both sides of the door frame (3), wherein the wall body (1) and the wall body (5) are each provided with a first square hole (2), a lubrication mechanism is provided inside the first square hole (2), a plurality of rotating shafts (16) are fixedly connected to both sides of the door frame (3), a first damper (4) and a second damper (8) are rotatably connected to the outer sides of the rotating shafts (16), and an automatic opening and closing mechanism is provided on the outer sides of the first damper (4) and the second damper (8); The lubricating mechanism comprises a hollow column (7), the hollow column (7) being fixedly connected to the inside of the first square hole (2), the inside of the hollow column (7) being connected to an oil tank (25) via a hose, the side of the hollow column (7) away from the oil tank (25) being fixedly connected to a connecting pipe (20), the outside of the connecting pipe (20) being fixedly connected to a plurality of oil delivery pipes (21), a spring (18) being provided inside the hollow column (7), a piston (23) being slidably connected inside the hollow column (7), and a push rod (22) being fixedly connected to the side of the piston (23) close to the opening of the hollow column (7).

2. The novel locking device for coal mine ventilation dampers according to claim 1 is characterized in that: The automatic opening and closing mechanism comprises a second fixed plate (15), the outer side of the second fixed plate (15) is fixedly connected to one side of the door frame (3), the top of the second fixed plate (15) is rotatably connected to a hydraulic pump (6), the output end of the hydraulic pump (6) is rotatably connected to a third connecting shaft (17), the bottom of the third connecting shaft (17) is fixedly connected to a rotating rod (11), the outer side of the first damper (4) is fixedly connected to a first fixed plate (9), the top of the first fixed plate (9) is fixedly connected to a first connecting shaft (10), the outer side of the second damper (8) is fixedly connected to an L-shaped plate (12), the top of the L-shaped plate (12) is fixedly connected to a second connecting shaft (13), the end of the rotating rod (11) away from the L-shaped plate (12) is rotatably connected to the outer side of the first connecting shaft (10), and the end of the rotating rod (11) away from the first fixed plate (9) is rotatably connected to the outer side of the second connecting shaft (13).

3. The novel locking device for coal mine ventilation dampers according to claim 1 is characterized in that: A first one-way valve (24) is fixedly connected to the inside of the hose, and an electromagnetic one-way valve (19) is fixedly connected to the outside of the connecting pipe (20).

4. The novel locking device for coal mine ventilation dampers according to claim 1 is characterized in that: The outer side of the connecting pipe (20) is fixedly connected to the inside of the wall (1), and each of the oil delivery pipes (21) is arranged one by one above a rotating shaft (16).

5. The novel locking device for coal mine ventilation dampers according to claim 1 is characterized in that: One end of the spring (18) away from the top wall of the hollow column (7) is fixedly connected to one side of the piston (23), and the end of the spring (18) away from the piston (23) abuts against the top wall of the hollow column (7).

6. The novel locking device for coal mine ventilation dampers according to claim 1 is characterized in that: One end of the push rod (22) away from the piston (23) abuts against the outer side of the first damper (4), and the other end of the push rod (22) away from the piston (23) abuts against the outer side of the second damper (8).

7. The novel locking device for coal mine ventilation dampers according to claim 1 is characterized in that: An oil inlet pipe (26) is fixedly connected to the interior of the oil tank (25), and the outer side of the push rod (22) is slidably connected to the interior of the hollow column (7).

8. The novel locking device for coal mine ventilation dampers according to claim 2 is characterized in that: A second square hole (14) is provided inside the second wall (5), and the outer side of the L-shaped plate (12) is slidably connected to the inside of the second square hole (14).

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