Coal mine non-pressure air door device

Abstract

The utility model relates to the technical field of non-pressure air doors, and discloses a coal mine non-pressure air door device which comprises a door frame, a left door and a right door are rotatably arranged in the door frame, two mounting grooves are formed in the sides, away from each other, of the left door and the right door respectively, two rotating shafts are fixed to the two sides of the inner wall of the door frame respectively, and the rotating shafts and the interiors of the mounting grooves are rotatably arranged. A lubricating structure is arranged between the left door and the right door. Through the arrangement of the lubricating structure, after the gear pump extracts lubricating oil in the oil storage tank, the lubricating oil is conveyed into the shaft shell through the conveying pipe and the connecting pipe, when the left door and the right door rotate in an opening and closing mode, friction is generated between the balls and the rotating shaft, the lubricating oil in the shaft shell is attached to the surfaces of the balls, and the lubricating oil is transmitted to the surface of the rotating shaft through rotation; by means of the lubricating mode, the maintenance workload and the maintenance cost are greatly reduced, meanwhile, the operation smoothness of the air door is guaranteed, the mine ventilation management efficiency is improved, and the operation safety is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of non-pressure air doors, in particular to a non-pressure air door device for coal mines. Background Art

[0002] The damper is an ideal ventilation device in my country's coal mines. It is mainly used in each connecting tunnel between the intake and return air tunnels and the main intake and return air tunnels in the mine. The double-leaf damper breaks the long-standing structural type of the old traditional damper and cleverly converts the wind pressure acting on the damper into an internal force through a balanced structure, fully demonstrating the unique structure, simple use, safety and reliability of the damper. It has been highly praised by experts and users and is a substitute for the dampers used in these air tunnels.

[0003] An existing pneumatic pressure-free damper device in coal mines (Announcement No.: CN217152008U) has at least the following disadvantages: Although the pressure-free damper drives the two doors to open and close through a cylinder, due to the large amount of dust in the mine, after long-term operation, the door's rotating shaft is prone to blockage due to dust accumulation or wear. This situation will cause the door to increase resistance when opening and closing, affecting work efficiency. In order to ensure the normal operation of the device, the rotating shaft needs to be lubricated and cleaned regularly, which not only increases the maintenance workload and cost, but also easily leads to poor operation of the damper due to untimely maintenance, further affecting the ventilation management and operation safety of the mine. For this reason, we propose this utility model. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a coal mine pressure-free air door device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A coal mine pressure-free air door device includes a door frame, wherein the door frame is internally rotatably provided with a left door and a right door, two mounting grooves are provided on the sides of the left door and the right door away from each other, two rotating shafts are fixed on both sides of the inner wall of the door frame, the rotating shafts are internally rotatably arranged with the mounting grooves, a lubrication structure is provided between the left door and the right door, the lubrication structure includes two shaft shells respectively fixed to the top and bottom surfaces inside the mounting grooves, the shaft shells are annular, the top and bottom ends of the rotating shaft are respectively rotatably arranged with the two shaft shells, a plurality of balls are rotatably provided on the inner circular wall of the shaft shells, and the outer circular wall of the balls fits with the outer circular wall of the rotating shaft.

[0007] As a further solution of the present invention, eight connecting holes are opened on one side of the door frame, and the eight connecting holes are arranged in groups of two corresponding to the four rotating shaft positions respectively. Two oil storage tanks are fixed on one side of the door frame, and a gear pump is connected and fixed on one side of the oil storage tank. The extraction end of the gear pump is located inside the oil storage tank, and the discharge end of the gear pump is connected and fixed to a delivery pipe. The top and bottom ends of the delivery pipe are respectively connected and fixed to two connecting pipes, which pass through the connecting holes and are connected and fixed to the shaft housing.

[0008] As a further solution of the present invention, a track gap is opened between the left door and the right door, and a blocking plate is slidably provided on one side of the left door and the right door. An electric push rod is fixed on the side of the two blocking plates away from each other, and one end of the two electric push rods is fixed to one side of the left door and the right door respectively.

[0009] As a further solution of the present invention, a fixing plate is fixed on one side of the left door, a connecting rod is rotatably provided on the top surface of the fixing plate, a mounting plate is rotatably provided on the other end of the connecting rod, one side of the mounting plate is fixed to one side of the right door, the fixing plate is L-shaped, an inclined plate is fixed on the other side of the left door, a support plate is fixed on the other side of the door frame, a cylinder is rotatably provided on the top surface of the support plate, and the telescopic end of the cylinder is rotatably provided with the top surface of the inclined plate.

[0010] As a further solution of the present invention, a first sealing strip is fixed to the front side of the left door, and a second sealing strip is fixed to the rear side of the right door. The first sealing strip and the second sealing strip are respectively fitted to the front and rear sides of the door frame.

[0011] As a further solution of the present invention, the sides of the left door and the right door that are away from each other are both arcuate surfaces, and the arcuate surfaces of the left door and the right door are respectively fitted with both sides of the inner wall of the door frame.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The pressureless damper device, through the setting of the lubrication structure, draws the lubricating oil from the oil tank with a gear pump, and delivers it to the shaft housing through the delivery pipe and the connecting pipe. When the left door and the right door are opened and closed, friction is generated between the ball and the rotating shaft. The lubricating oil in the shaft housing adheres to the surface of the ball, and the lubricating oil is transferred to the surface of the rotating shaft through rotation, thereby realizing automatic lubrication of the rotating shaft. This lubrication method greatly reduces the maintenance workload and maintenance costs. At the same time, it ensures the smoothness of the damper operation, improves the efficiency of mine ventilation management, and further enhances operational safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of a coal mine pressure-free air door device proposed by the utility model;

[0015] Figure 2This is a schematic diagram of the disassembled structure of a coal mine pressure-free air door device proposed by the utility model;

[0016] Figure 3 This is a schematic diagram of the split structure of the shaft housing of a coal mine pressure-free air door device proposed by the utility model;

[0017] Figure 4 A coal mine pressure-free air door device proposed by the utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0018] In the figure: 1. Door frame; 101. Axle housing; 102. Ball bearing; 2. Left door; 201. Connecting hole; 202. Oil storage tank; 203. Gear pump; 204. Connecting pipe; 205. Delivery pipe; 3. Right door; 301. Track gap; 302. Blocking plate; 303. Electric push rod; 4. Mounting groove; 401. Fixed plate; 402. Mounting plate; 403. Inclined plate; 404. Support plate; 405. Cylinder; 406. Connecting rod; 5. Rotating shaft; 501. First sealing strip; 502. Second sealing strip. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0022] Reference Figures 1-4The utility model provides a coal mine pressureless air door device, including the door frame 1, the inside rotation of door frame 1 is provided with left door 2 and right door 3, and the side away from each other of left door 2 and right door 3 is provided with two installation slot 4, and the both sides of the inner wall of door frame 1 are fixed with two rotation shafts 5, and the inside rotation of rotation shaft 5 and installation slot 4 is arranged, and the lubrication structure is arranged between left door 2 and right door 3, and the lubrication structure includes two shaft housings 101 fixed in the top surface and the top surface of installation slot 4 respectively, the shaft housing 101 is annular, and the top end and the bottom end of rotation shaft 5 are rotatably arranged in the inside of two shaft housings 101 respectively, and a plurality of ball bearings 102 are rotatably arranged on the inner circumferential wall of shaft housing 101, and the outer circumferential wall of ball bearing 102 is attached to the outer circumferential wall of rotation shaft 5.

[0023] In the embodiment, eight connecting holes 201 are formed on one side of the door frame 1, the eight connecting holes 201 are arranged in two groups corresponding to the positions of the four rotation shafts 5 respectively, two oil storage tanks 202 are fixed on one side of the door frame 1, a gear pump 203 is fixed in communication on one side of the oil storage tank 202, the suction end of the gear pump 203 is located in the inside of the oil storage tank 202, a delivery pipe 205 is fixed in communication at the discharge end of the gear pump 203, two connecting pipes 204 are fixed in communication at the top end and the bottom end of the delivery pipe 205 respectively, the connecting pipes 204 pass through the connecting holes 201 and are fixed in communication with the shaft housings 101, and the connecting pipes 204 are telescopic hoses. Through the arrangement of the lubrication structure, the staff starts the gear pump 203 to extract the lubricating oil in the oil storage tank 202, and then delivers the lubricating oil into the shaft housings 101 through the delivery pipe 205 and the connecting pipes 204. When the shaft housings 101 are filled with sufficient lubricating oil, the gear pump 203 stops running. When the left door 2 and the right door 3 are opened and rotated, the shaft housings 101 rotate with them, so that the ball bearings 102 rub against the rotation shafts 5. The ball bearings 102 rotate in the process of rubbing, and the surface of the ball bearings 102 is attached with the lubricating oil in the shaft housings 101, which is transferred to the surface of the rotation shafts 5 through rotation, thereby realizing automatic lubrication of the rotation shafts 5. This lubrication method eliminates the need for manual lubrication of the rotation shafts 5 by the staff, greatly reduces the maintenance workload and cost, ensures the smooth operation of the air door, improves the efficiency of mine ventilation management, and further improves the safety of operation.

[0024] In the embodiment, a track gap 301 is formed between the left door 2 and the right door 3, and a sealing plate 302 is slidably arranged on one side of the left door 2 and the right door 3. The sealing plate 302 is fixed with an electric push rod 303 on the side away from each other, and one end of the electric push rod 303 is fixed with the left door 2 and the right door 3 respectively. The track gap 301 can facilitate the installation of the operation track of the mine car, and the two electric push rods 303 can control the two sealing plates 302 to move away from each other, so that the sealing plate 302 is close to the track on both sides to block the track gap 301 and prevent air leakage.

[0025] In this embodiment, a fixing plate 401 is fixed to one side of the left door 2, and a connecting rod 406 is rotatably provided on the top surface of the fixing plate 401. The other end of the connecting rod 406 is rotatably provided with a mounting plate 402. One side of the mounting plate 402 is fixed to one side of the right door 3. The fixing plate 401 is L-shaped, and an inclined plate 403 is fixed to the other side of the left door 2. A supporting plate 404 is fixed to the other side of the door frame 1. A cylinder 405 is rotatably provided on the top surface of the supporting plate 404. The telescopic end of the cylinder 405 is rotatably provided with the top surface of the inclined plate 403. When the left door 2 and the right door 3 are opened, the cylinder 405 extends out to push the inclined plate 403 to drive the left door 2 to rotate and open. When the left door 2 rotates and opens, the connecting rod 406 pushes the right door 3 to rotate and open in the opposite direction. When closing, the cylinder 405 can be retracted, which is convenient for the staff to operate.

[0026] In this embodiment, a first sealing strip 501 is fixed to the front side of the left door 2, and a second sealing strip 502 is fixed to the rear side of the right door 3. The first sealing strip 501 and the second sealing strip 502 are respectively fitted with the front and rear sides of the door frame 1. The first sealing strip 501 and the second sealing strip 502 can seal the top seams between the door frame 1 and the left door 2 and the right door 3 to prevent air leakage.

[0027] In this embodiment, the sides of the left door 2 and the right door 3 that are away from each other are both curved surfaces, and the curved sides of the left door 2 and the right door 3 are respectively fitted with the two sides of the inner wall of the door frame 1. The curved sides of the left door 2 and the right door 3 can prevent air leakage at the left and right joints between the door frame 1 and the left door 2 and the right door 3, and at the same time facilitate the rotation of the left door 2 and the right door 3.

[0028] Working principle: During use, the staff starts the gear pump 203, extracts the lubricating oil in the oil storage tank 202, and delivers it to the shaft housing 101 through the delivery pipe 205 and the connecting pipe 204. When the shaft housing 101 is filled with sufficient lubricating oil, the gear pump 203 stops running. When the left door 2 and the right door 3 are opened and closed, friction is generated between the ball 102 and the shaft 5. The ball 102 rotates in the friction, and the lubricating oil in the shaft housing 101 adheres to its surface, and the lubricating oil is transferred to the surface of the shaft 5 through rotation, thereby realizing automatic lubrication of the shaft 5. The track gap 301 can facilitate the installation of the running track of the mine crane. At the same time, the two electric push rods 303 can control the two blocking plates 302 When the left door 2 and the right door 3 are opened, the cylinder 405 extends out to push the inclined plate 403 to drive the left door 2 to rotate and open. When the left door 2 is rotated and opened, the connecting rod 406 pushes the right door 3 to rotate and open in the opposite direction. When closing, the cylinder 405 can be retracted, which is convenient for the staff to operate. The first sealing strip 501 and the second sealing strip 502 can seal the top joints between the door frame 1 and the left door 2 and the right door 3 to prevent air leakage. The curved sides of the left door 2 and the right door 3 can prevent air leakage at the left and right joints between the door frame 1 and the left door 2 and the right door 3, while facilitating the rotation of the left door 2 and the right door 3.

[0029] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A coal mine non-pressure air door device, comprising a door frame (1), characterized in that: The door frame (1) is internally rotatably provided with a left door (2) and a right door (3), and two mounting grooves (4) are provided on the sides of the left door (2) and the right door (3) away from each other. Two rotating shafts (5) are fixed on both sides of the inner wall of the door frame (1), and the rotating shafts (5) are internally rotatably provided with the mounting grooves (4). A lubrication structure is provided between the left door (2) and the right door (3), and the lubrication structure includes two shaft shells (101) respectively fixed on the top and bottom surfaces of the inner part of the mounting grooves (4). The shaft shells (101) are annular, and the top and bottom ends of the rotating shaft (5) are respectively rotatably provided with the two shaft shells (101). The inner circular wall surface of the shaft shell (101) is rotatably provided with a plurality of balls (102), and the outer circular wall surface of the balls (102) is in contact with the outer circular wall surface of the rotating shaft (5).

2. A coal mine non-pressure damper device according to claim 1, characterized in that: One side of the door frame (1) is provided with eight connection holes (201), and the eight connection holes (201) correspond to the positions of the four rotating shafts (5) in groups of two. Two oil storage tanks (202) are fixed to one side of the door frame (1), and a gear pump (203) is connected and fixed to one side of the oil storage tank (202). The extraction end of the gear pump (203) is located inside the oil storage tank (202), and the discharge end of the gear pump (203) is connected and fixed to a delivery pipe (205). The top and bottom ends of the delivery pipe (205) are respectively connected and fixed to two connection pipes (204), and the connection pipes (204) pass through the connection holes (201) and are connected and fixed to the shaft housing (101).

3. A coal mine non-pressure damper device according to claim 2, characterized in that: A track notch (301) is provided between the left door (2) and the right door (3), and a blocking plate (302) is slidably provided on one side of the left door (2) and the right door (3). An electric push rod (303) is fixed on the side of the two blocking plates (302) that are away from each other, and one end of the two electric push rods (303) is fixed to one side of the left door (2) and the right door (3), respectively.

4. A coal mine non-pressure damper device according to claim 3, characterized in that: A fixing plate (401) is fixed to one side of the left door (2), a connecting rod (406) is rotatably provided on the top surface of the fixing plate (401), a mounting plate (402) is rotatably provided on the other end of the connecting rod (406), one side of the mounting plate (402) is fixed to one side of the right door (3), the fixing plate (401) is L-shaped, an inclined plate (403) is fixed to the other side of the left door (2), a supporting plate (404) is fixed to the other side of the door frame (1), a cylinder (405) is rotatably provided on the top surface of the supporting plate (404), and a telescopic end of the cylinder (405) is rotatably provided on the top surface of the inclined plate (403).

5. A coal mine non-pressure damper device according to claim 4, characterized in that: A first sealing strip (501) is fixed to the front side of the left door (2), and a second sealing strip (502) is fixed to the rear side of the right door (3). The first sealing strip (501) and the second sealing strip (502) are respectively fitted to the front and rear sides of the door frame (1).

6. A coal mine non-pressure damper device according to claim 5, characterized in that: The sides of the left door (2) and the right door (3) that are away from each other are both arcuate surfaces, and the arcuate surfaces of the left door (2) and the right door (3) are respectively fitted with the two sides of the inner wall of the door frame (1).

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