Anti-reflux device used under mine

Abstract

The utility model discloses an anti-reflux device used under a mine, which comprises a fixed plate fixedly mounted on a wall surface, the fixed plate is positioned above an adjusting air window, two support rods are vertically and forwards arranged on the front surface of the fixed plate, a separation plate is hinged below the support rods through a connecting seat, and a rotating shaft is rotatably connected between the two support rods. When coal and gas outburst or gas explosion occurs, shock waves generated by the explosion firstly impact the shock wave bearing plate, the shock wave bearing plate rotates backwards, the lap joint of the isolation plate and the shock wave bearing plate is loosened, and the isolation plate and the shock wave bearing plate naturally rotate and droop. An adjusting air window or a belt hole is closed, poisonous and harmful gas is prevented from diffusing out of the air door, and safety risks are reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of mine safety management equipment, specifically relating to an anti-backflow device used in underground mines. Background Technology

[0002] A regulating ventilation window is a small, adjustable window located above an air door or ventilation wall. Airflow is adjusted by changing the size of this window, and is typically operated manually. However, during underground coal mine tunnel excavation, in the event of a coal and gas outburst or gas explosion, if the regulating ventilation window is not completely sealed, toxic and harmful gases can diffuse outwards through the window, increasing safety risks. Utility Model Content

[0003] The purpose of this invention is to provide an anti-backflow device for underground mines, which automatically closes the regulating air window in the event of a coal and gas outburst or gas explosion to prevent toxic and harmful gases from spreading to the outside of the ventilation door through the regulating air window.

[0004] The technical solution adopted by this utility model is an anti-backflow device for underground mines, including a fixed plate fixedly installed on the wall. The fixed plate is located above the regulating air window. Two support rods are provided vertically forward on the front of the fixed plate. An isolation plate is hinged to the bottom of the support rods through a connecting seat. A rotating shaft is rotatably connected between the two support rods. A shock wave receiving plate is fixedly connected to the rotating shaft. The shock wave receiving plate is vertically upward and its lower part is movably connected to the isolation plate. After the isolation plate hangs down naturally, it faces the regulating air window and forms a seal.

[0005] Furthermore, the lower back of the aforementioned shock wave bearing plate is provided with a horizontal overlapping plate, and the top of the isolation plate is provided with an L-shaped connecting plate corresponding to the overlapping plate. The connecting plate overlaps with the overlapping plate after being inverted.

[0006] Furthermore, a sealing gasket is provided below the aforementioned isolation plate corresponding to the adjustable air window.

[0007] Furthermore, a spring seat is fixedly provided at the end of the isolation plate below the aforementioned adjustable windshield, and a buffer spring is fixedly installed on the spring seat. A magnetic piece is provided at the head end of the buffer spring, and a magnetic piece of opposite polarity is provided on the inner side of the bottom end of the isolation plate corresponding to the magnetic piece one.

[0008] Furthermore, a pressure sensor is provided at the end of the aforementioned buffer spring, and the pressure sensor is connected to an alarm.

[0009] Furthermore, the two support rods mentioned above are provided with limiting plates facing inwards near their ends, and the limiting plates are located outside the shock wave receiving plate and in contact with it.

[0010] Compared with the prior art, the beneficial effect of this utility model is that when a coal and gas outburst or gas explosion occurs, the shock wave generated by the explosion will first impact the shock wave receiving plate, the shock wave receiving plate will rotate backward, the joint between the isolation plate and the shock wave receiving plate will loosen, and the plate will naturally rotate and droop, sealing the regulating window or belt hole, preventing toxic and harmful gases from spreading to the outside of the ventilation door, and reducing safety risks. Attached Figure Description

[0011] Figure 1 A side view of the anti-backflow device;

[0012] Figure 2 A schematic diagram of the structure for sealing the regulating window to prevent backflow;

[0013] Figure 3 Main view of the adjustable vent for backflow prevention device;

[0014] Figure 4 This is a schematic diagram showing the overlap between the isolation plate and the shock wave bearing plate.

[0015] Figure 5 This is a schematic diagram of the spring seat structure. Detailed Implementation

[0016] The present invention will be further explained below with reference to the accompanying drawings to enable those skilled in the art to better understand it.

[0017] Example 1

[0018] like Figure 1-5 As shown, the anti-backflow device used in mines includes a fixed plate 1 fixedly installed on the wall. The fixed plate 1 is located above the regulating air window 2. Two support rods 3 are vertically forward on the front of the fixed plate 1. An isolation plate 5 is hinged to the bottom of the support rods 3 through a connecting seat 4. A rotating shaft 6 is rotatably connected between the two support rods 3. A shock wave receiving plate 7 is fixedly connected to the rotating shaft 6. The shock wave receiving plate 7 is vertically upward and its lower part is movably connected to the isolation plate 5. In the initial state, the isolation plate 5 is horizontal and the shock wave receiving plate 7 is vertical. When a coal and gas outburst or gas explosion occurs, the shock wave generated by the explosion first impacts the shock wave receiving plate 7. The shock wave receiving plate 7 rotates backward, and the connection between the isolation plate 5 and the shock wave receiving plate 7 loosens. It naturally rotates and hangs down directly facing the regulating air window 2 or belt hole, closing the regulating air window 2 or belt hole to prevent toxic and harmful gases from spreading out of the air door and reduce safety risks.

[0019] Furthermore, the lower back of the aforementioned shock wave absorbing plate 7 is provided with a horizontal overlapping plate 8, and the top of the isolation plate 5 is provided with an L-shaped connecting plate 9 corresponding to the overlapping plate 8. The connecting plate 9 is inverted and overlaps with the overlapping plate 8. By using the overlapping plate 8 and the connecting plate 9 to overlap in an L-shape, during normal operation, the friction between the overlapping plate 8 and the connecting plate 9 and the tensile force generated by the weight of the overlapping plate ensure that the isolation plate 5 remains horizontal and the shock wave absorbing plate 7 remains vertical. When the shock wave absorbing plate 7 is impacted by an explosive shock wave, the overlapping plate 8 and the connecting plate 9 immediately detach.

[0020] In order to improve the sealing effect of the isolation plate 5 on the regulating window 2, a sealing gasket 10 is provided below the isolation plate 5 corresponding to the regulating window 2.

[0021] Furthermore, a spring seat 11 is fixedly provided at the end of the isolation plate 5 below the aforementioned adjustable window 2. A buffer spring 12 is fixedly installed on the spring seat 11. A magnetic piece 13 is provided at the head end of the buffer spring 12, and a magnetic piece 14 of opposite polarity is provided on the inner side of the bottom end of the isolation plate 5 corresponding to the magnetic piece 13. The buffer spring 12 plays a buffering and protective role against the sudden drooping of the isolation plate, preventing excessive impact damage to the adjustable window 2 or the isolation plate 5 itself. At the same time, the attraction between the magnetic piece 13 and the magnetic piece 14 prevents the isolation plate 5 from rebounding after natural drooping and impact, and keeps it in a vertical state to completely seal the adjustable window 2.

[0022] The aforementioned buffer spring 12 is equipped with a pressure sensor 16 at its end. The pressure sensor 16 is connected to an alarm or control terminal. After the isolation plate 5 is activated, the pressure sensor 14 senses the pressure change, which helps staff to be aware of the situation through the alarm or control terminal and handle it in a timely manner.

[0023] The two support rods 3 are provided with limiting plates 15 facing each other inward near their ends. The limiting plates 15 are located outside the shock wave bearing plate 7 and are in contact with it to prevent the shock wave bearing plate 7 from rotating outward.

[0024] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from its design spirit and principles should fall within the protection scope defined by the claims of the present invention.

Claims

1. A reverse flow prevention device for use in a mine, characterised in that, The utility model relates to a kind of shock wave isolation device, including fixedly installed fixed plate (1) on wall surface, fixed plate (1) is located above regulating air window (2), and two support rods (3) are vertically provided in front in fixed plate (1) front, support rod (3) is hinged with isolation plate (5) below by connecting seat (4), rotating shaft (6) is rotatably connected between two support rods (3), impact wave bearing plate (7) is fixedly connected on rotating shaft (6), impact wave bearing plate (7) is vertically upwards and lower part is movably connected with isolation plate (5), isolation plate (5) is opposite regulating air window (2) after natural droop, and it is closed to form.

2. A reverse flow preventing device for use in a mine, according to claim 1, characterised in that The lower back of the impact wave bearing plate (7) is provided with a horizontal lap plate (8), and the top end of the isolation plate (5) is provided with an L-shaped connecting plate (9) corresponding to the lap plate (8), and the connecting plate (9) is inverted and lapped with the lap plate (8).

3. A reverse flow prevention device for use in a mine, according to claim 1, characterised in that, The lower back of the impact wave bearing plate (7) is provided with a horizontal lap plate (8), and the top end of the isolation plate (5) is provided with an L-shaped connecting plate (9) corresponding to the lap plate (8), and the connecting plate (9) is inverted and lapped with the lap plate (8).

4. The reverse flow prevention device for use in a mine, according to claim 1, characterized in that, The lower back of the impact wave bearing plate (7) is provided with a horizontal lap plate (8), and the top end of the isolation plate (5) is provided with an L-shaped connecting plate (9) corresponding to the lap plate (8), and the connecting plate (9) is inverted and lapped with the lap plate (8).

5. A reverse flow preventing device for use in a mine, according to claim 4, characterised in that The lower back of the impact wave bearing plate (7) is provided with a horizontal lap plate (8), and the top end of the isolation plate (5) is provided with an L-shaped connecting plate (9) corresponding to the lap plate (8), and the connecting plate (9) is inverted and lapped with the lap plate (8).

6. The reverse flow prevention device for use in a mine, according to claim 1, characterized in that, The lower back of the impact wave bearing plate (7) is provided with a horizontal lap plate (8), and the top end of the isolation plate (5) is provided with an L-shaped connecting plate (9) corresponding to the lap plate (8), and the connecting plate (9) is inverted and lapped with the lap plate (8).

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