Mining dust suppression air door structure

Abstract

The invention discloses a mining dust suppression air door structure, and relates to the field of mining equipment, the mining dust suppression air door structure comprises a frame, two air doors are arranged in the frame, a negative pressure opening structure is arranged at the top of the frame, the negative pressure opening structure comprises an electric double-head air cylinder, and a fixing ring is arranged at the center of the top of the frame. The electric double-head air cylinder is fixedly connected to the interior of the fixing ring, a pair of fixing blocks are fixedly connected to the left side of the front portion of the air door close to the left side and the right side of the rear portion of the air door close to the right side, connecting rods are fixedly connected to the interiors of the two pairs of fixing blocks, and first connecting blocks are fixedly connected to the tops of the two pairs of fixing blocks; the two output ends of the electric double-end air cylinder are rotationally connected with the two first connecting blocks correspondingly. The negative pressure opening structure is arranged, in the initial state, the two door plates form a whole through meshing of the inserting blocks and the inserting grooves, the whole door plates are driven by the electric double-end air cylinder to rotate by 90 degrees anticlockwise, a channel is divided into access paths which do not interfere with one another, personnel flow dividing is achieved, and the passing efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of mining equipment, and particularly to a dust suppression air door structure for mines. Background Art

[0002] The mining air door is a key facility in the underground ventilation system of mines, mainly used to adjust and control the air flow direction and air volume in the roadway, ensure the air circulation in the underground operation area and isolate harmful gases. It is usually made of steel or corrosion-resistant materials, with characteristics such as fire prevention, explosion prevention, and strong sealing. Structurally, it is divided into manual or automatic control types, which can effectively prevent the short-circuit of air flow, maintain the stability of the ventilation system, and ensure the safety of miners and the efficient operation of the mine;

[0003] The Chinese patent with the publication number "CN103742183A" discloses a dust suppression air door for mines, including a door frame, a door leaf, a pin shaft, a fan frame, a fan shell, a wind blade, a shaft, a bearing seat, a wind blade protective cover, a drain pipe, an inlet pipe for underground water supply, and an atomizing nozzle. Its characteristics are: on both sides inside the door frame, door leaves are symmetrically arranged, the door frame and the door leaf are connected by a pin shaft, on both sides outside the door frame, fan frames are symmetrically arranged, a fan shell is installed inside the fan frame, a wind blade protective cover is arranged outside the wind blade, the inlet pipe is connected to the fan frame, and the inlet pipe is connected to the atomizing nozzle;

[0004] This invention uses a water spray system and a fan powered by the return air of the underground branch roadway to wet the air with dust to achieve the purpose of dust reduction. However, the single-door or simple double-door structure cannot separate the access channels, and the cross-passage of personnel and vehicles is likely to cause potential safety hazards. Summary of the Invention

[0005] The main purpose of the present invention is to provide a dust suppression air door structure for mines, which can effectively solve the technical problems in the background art.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A dust suppression air door structure for mines includes a frame. Inside the frame, two air doors are provided, and a negative pressure opening structure is arranged at the top of the frame. The negative pressure opening structure includes an electric double-headed cylinder. A fixed ring is arranged at the center of the top of the frame, and the electric double-headed cylinder is fixedly connected inside the fixed ring. On the left front of the left air door and on the right rear of the right air door, a pair of fixed blocks are fixedly connected respectively. Inside the two pairs of fixed blocks, connecting rods are fixedly connected respectively. On the top of the two pairs of fixed blocks, connecting blocks one are fixedly connected respectively. The two output ends of the electric double-headed cylinder are respectively rotationally connected to the two connecting blocks one. A anti-detachment block is fixedly connected to the bottom of the fixed ring, and the anti-detachment block is rotationally connected to the frame;

[0008] The inner center of the frame is slidably connected to a rotating shaft near the top and bottom, the top and bottom of the two dampers are both provided with a circular groove, the mutually adjacent surfaces of the two dampers are provided with slots that are staggered in sequence, and the mutually adjacent surfaces of the two dampers are fixedly connected with plug blocks that are staggered in sequence.

[0009] As a further solution of the present invention, the insert block is adaptively matched with the slot, and the two dampers are fixedly connected to the away sides thereof with sealing rubber pads.

[0010] As a further solution of the present invention, the rotating shaft is adaptively matched with the circular groove.

[0011] As a further solution of the present invention, the front and rear bottom parts of the frame are fixedly connected to support blocks, the interiors of the two support blocks are rotatably connected to auxiliary cylinders, the bottoms of the two pairs of fixed blocks are fixedly connected to connecting blocks 2, and the output ends of the two auxiliary cylinders are rotatably connected to the two connecting blocks 2 respectively.

[0012] As a further solution of the present invention, the front and rear parts of the frame are both provided with a switching structure, the switching structure includes a dial plate and a dial rod, the front part of the frame is fixedly connected to a pair of fixed blocks on the left side, the dial plate is rotatably connected to the inside of the pair of fixed blocks, the dial rod is rotatably connected to one side of the inside of the dial plate, an arc groove is provided at the front part of the dial rod, the top and bottom of the dial plate are rotatably connected to a one-way rotating block, the outer surface of the one-way rotating block is provided with a card slot, the top of the dial plate is rotatably connected to the card rod, the top of the dial plate is fixedly connected to the arc plate, and two springs are fixedly connected between the arc plate and the card rod.

[0013] As a further solution of the present invention, the clamping slot is composed of an inclined surface and a vertical surface, and a protrusion is provided at the rear of the clamping rod, and the rear protrusion of the clamping rod is adaptively matched with the clamping slot.

[0014] As a further solution of the present invention, the connecting rod is located inside the arc groove, the center of the arc groove and the center of the anti-slip block are on the same vertical line, the top and bottom of the shift rod respectively pass through the top and bottom of the shift plate, and the top and bottom of the shift rod are fixedly connected to the two one-way rotating blocks at the top and bottom respectively.

[0015] As a further solution of the present invention, the rear part of the frame is provided with a full-through structure, the full-through structure includes a pressure plate, a pair of bottom blocks are provided at the rear part of the frame, the pressure plate and the pair of bottom blocks are rotatably connected, the interior of the two pairs of fixed blocks and the interiors of the two dial plates are respectively fixedly connected with straight rods, the outer surface of the straight rod is located inside the dial plate and is slidably connected with a toggle block, a spring 2 is fixedly connected between the top of the toggle block and the fixed block, a spiral groove is provided on the outer surface of the toggle block, a slider is slidably connected to the bottom of the spiral groove, the slider is fixedly connected to the inner wall of the dial plate, two cables are fixedly connected to the bottom of the toggle block, one end of the cable is fixedly connected to the bottom of the pressure plate, and a number of springs 3 are fixedly connected to the bottom of the pressure plate.

[0016] As a further solution of the present invention, two pairs of mounting blocks are fixedly connected to the front left side and the rear left side of the frame, and each pair of mounting blocks is rotatably connected to a pulley inside, and the cable is wound around the pulley.

[0017] As a further solution of the present invention, the bottom of the bottom block is at the same height as the bottom of the frame, and the top of the pressure plate is at a height higher than the bottom of the damper.

[0018] The beneficial effects of the present invention are as follows:

[0019] By setting up a negative pressure opening structure, in the initial state, the engagement of the insert and the slot makes the two door panels form a whole. The electric double-headed cylinder drives the whole to rotate 90 degrees counterclockwise, separating the channel into non-interfering entry and exit paths, realizing personnel diversion and improving traffic efficiency.

[0020] When the two door panels that form a whole rotate, the left door panel rotates forward and the right door panel rotates backward. The airflow creates a dynamic balance between the assistance and resistance on both sides, preventing the air pressure difference from interfering with the rotation stability and ensuring smooth movement.

[0021] The top electric double-head cylinder and the bottom auxiliary cylinder work together with the sliding buffer of the rotating shaft to achieve synchronous support of the top and bottom of the door panel, ensuring rotation stability and structural rigidity;

[0022] The sealing pad on the edge of the door panel fills the gap between the door panel and the frame, effectively suppressing dust leakage and improving the dust suppression effect;

[0023] The switching mechanism allows for independent control of the left and right door panels' reverse rotation, fully opening the frame for trucks to pass through. The arc-shaped slot and connecting rod linkage ensure that the door panel's overall rotation is not affected by the switching mechanism. The engagement of the one-way turning block and the latching rod prevents over-reset, enhancing safety.

[0024] By setting up a full-through structure, when the loaded truck drives to the front end of the air door, its wheels roll over the top of the pressure plate, forcing the pressure plate to rotate downward and compressing the bottom spring three. At this time, the pressure plate drives the toggle block to slide downward along the straight rod by pulling the cable fixed to its bottom, and the interaction between the spiral slide groove inside the toggle block and the fixed slider converts the vertical linear displacement into a rotational torque, driving the toggle rod to rotate counterclockwise around the axis of the fixed block. The rotation of the toggle rod is transmitted through the engagement of the arc groove and the connecting rod, further pulling the fixed block and connecting block of the corresponding door panel, so that the left and right door panels rotate independently to the front and rear sides of the frame respectively, realizing the full expansion of the entire air door channel. This process does not require manual operation. The truck automatically resets itself through the rear pressure plate under the action of spring three, and the door panels close synchronously, which significantly shortens the waiting time of trucks. It is especially suitable for high-frequency transportation scenarios in mines, ensuring safe passage while improving work efficiency.

[0025] At the same time, when the two door panels rotate independently and synchronously in opposite directions, the two output ends of the electric double-headed cylinder can extend normally. Therefore, with the assistance of the electric double-headed cylinder, the speed of the two door panels rotating independently and synchronously can be further increased, so that the waiting time of the truck passing through the damper is further shortened, thereby further improving the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a dust suppression damper structure for mining according to the present invention;

[0027] Figure 2 This is a diagram showing the negative pressure opening structure of a dust suppression damper structure for mining according to the present invention;

[0028] Figure 3 This is a disassembled display diagram of the negative pressure opening structure of a dust suppression damper structure for mining according to the present invention;

[0029] Figure 4 This is a diagram showing the switching structure of a dust suppression damper structure for mining according to the present invention;

[0030] Figure 5 This is a diagram showing a shift plate and a shift rod of a dust suppression damper structure for mining according to the present invention;

[0031] Figure 6 This is a disassembled display diagram of a one-way rotating block and a clamping rod of a dust suppression air door structure for mining according to the present invention;

[0032] Figure 7 This is a full-length structural diagram of a dust suppression damper structure for mining according to the present invention;

[0033] Figure 8 This is a diagram showing the full structural analysis and disassembly of a dust suppression damper structure for mining according to the present invention;

[0034] Figure 9 The present invention is a mine dust suppression air door structure Figure 8 A magnified view of part A;

[0035] Figure 10 This is a diagram showing a toggle block and a straight rod of a dust suppression damper structure for mining according to the present invention;

[0036] Figure 11 This is a rear perspective view of the overall structure of a mining dust suppression damper structure of the present invention;

[0037] Figure 12 This is a three-dimensional illustration of the spring of a dust suppression damper structure for mining according to the present invention.

[0038] In the figure: 1. frame; 2. door panel; 3. negative pressure opening structure; 4. electric double-headed cylinder; 5. connecting block 1; 6. fixed block; 7. connecting rod; 8. support block; 9. connecting block 2; 10. auxiliary cylinder; 11. sealing gasket; 12. anti-drop block; 13. circular groove; 14. slot; 15. plug-in block; 16. rotating shaft; 17. switching structure; 18. fixing block; 19. dial plate; 20. dial rod; 21. arc groove; 22. one-way rotating block; 23. clamping rod; 24. clamping slot; 25. arc plate; 26. spring 1; 27. full-through structure; 28. bottom block; 29. pressure plate; 30. mounting block; 31. pulley; 32. cable; 33. spring 2; 34. straight rod; 35. toggle block; 36. spiral slide; 37. slider; 38. spring 3; 39. fixing ring. DETAILED DESCRIPTION

[0039] 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.

[0040] like Figure 1 - Figure 12 As shown, a dust suppression air door structure for mining comprises a frame 1, two door panels 2 are arranged inside the frame 1, a negative pressure opening structure 3 is arranged on the top of the frame 1, the negative pressure opening structure 3 comprises an electric double-headed cylinder 4, a fixing ring 39 is arranged at the top center of the frame 1, the electric double-headed cylinder 4 is fixedly connected to the inside of the fixing ring 39, a pair of fixing blocks 6 are fixedly connected to the left side of the front of the door panel 2 on the left and the right side of the rear of the door panel 2 on the right, the two pairs of fixing blocks 6 are fixedly connected to the inside of each of the connecting rods 7, the tops of the two pairs of fixing blocks 6 are fixedly connected to a connecting block 5, the two output ends of the electric double-headed cylinder 4 are rotatably connected to the two connecting blocks 5 respectively, the bottom of the fixing ring 39 is fixedly connected to an anti-slip block 12, and the anti-slip block 12 is rotatably connected to the frame 1;

[0041] The inner center of the frame 1 near the top and bottom is slidably connected with a rotating shaft 16, the top and bottom of the two door panels 2 are jointly provided with a circular groove 13, the mutually adjacent surfaces of the two door panels 2 are provided with slots 14 that are staggered in sequence, and the mutually adjacent surfaces of the two door panels 2 are fixedly connected with plug blocks 15 that are staggered in sequence.

[0042] In the initial position, the slots 14 and the insertion blocks 15 of the two door panels 2 are inserted into each other, so that the two door panels 2 form a whole. When a person needs to pass through the air door, since the output ends of the electric double-headed cylinder 4 are rotatably connected to the first connecting blocks 5, at this time, when starting, the two output ends of the electric double-headed cylinder 4 pre-elongate. However, the two output ends of the electric double-headed cylinder 4 are restricted by the two first connecting blocks 5 and cannot elongate. And at this time, the elongation force of the right output end of the electric double-headed cylinder 4 is greater than that of the left output end. Then, the elongation power of the output end of the electric double-headed cylinder 4 is converted into the counterclockwise rotation force of the fixed ring 39 together with the anti-drop block 12 along the top of the frame 1. Then, the two door panels 2 that form a whole are rotated counterclockwise along the two rotating shafts 16 together until the two door panels 2 that form a whole are rotated counterclockwise by 90 degrees. At this time, the two door panels 2 partition the inside of the frame 1 into two non-interconnected channels. At this time, the two channels can respectively pass people, so as to separate the people entering and leaving the air door;

[0043] During the counterclockwise rotation of the two door panels 2 that form a whole, since the opening degree of the air door gradually increases from small, during this process, the air pressure at the rear of the air door is higher than the air pressure at the front and rear of the air door. Therefore, the air flow at the rear of the air door will blow from the rear to the front, thus squeezing the two door panels 2 that form a whole. At the same time, during the counterclockwise rotation of the two door panels 2 that form a whole, the door panel 2 on the left side rotates forward compared with the frame 1, and the door panel 2 on the right side rotates backward compared with the frame 1. Therefore, its air flow will assist the door panel 2 on the left side to rotate forward and hinder the door panel 2 on the right side from rotating backward. Since the air flow acts on the two door panels 2 synchronously, the obstructive air flow and the assisting air flow acting on the two door panels 2 will form a two-force balance. Therefore, during the counterclockwise rotation of the two door panels 2 that form a whole, it will not be affected by the air pressure.

[0044] In this embodiment, the insertion block 15 is adaptively matched with the slot 14. Sealing rubber pads 11 are fixedly connected to the mutually remote sides of the two door panels 2, and the sealing rubber pads 11 will fill the gaps between the door panels 2 and the frame 1.

[0045] In this embodiment, the rotating shaft 16 is adaptively matched with the circular groove 13.

[0046] In this embodiment, support blocks 8 are fixedly connected to the bottom of the front part and the bottom of the rear part of the frame 1. Secondary cylinders 10 are rotatably connected to the inside of the two support blocks 8. Second connecting blocks 9 are fixedly connected to the bottoms of the two pairs of fixed blocks 6. The output ends of the two secondary cylinders 10 are respectively rotatably connected to the two second connecting blocks 9.

[0047] During the counterclockwise rotation of the two door panels 2 that form the whole, the two connecting blocks II 9 will be driven to rotate together, and the output ends of the two sub-cylinders 10 will extend synchronously, so as to support the bottoms of the two door panels 2. Then, in cooperation with the electric double-headed cylinder 4 at the top, the tops and bottoms of the two door panels 2 will be supported synchronously, enabling the door panels 2 to rotate smoothly.

[0048] If the elongation force of the right output end of the electric double-headed cylinder 4 is greater than that of the left output end, it will drive the two door panels 2 to rotate counterclockwise synchronously along the two rotating shafts 16, realizing the operation of opening the door. If the elongation force of the left output end of the electric double-headed cylinder 4 is greater than that of the right output end, it will drive the two door panels 2 to rotate clockwise synchronously along the two rotating shafts 16, realizing the operation of closing the door.

[0049] In this embodiment, switching structures 17 are arranged at both the front and rear parts of the frame 1. The switching structure 17 includes a dial plate 19 and a dial rod 20. A pair of fixed blocks 18 are fixedly connected to the left side of the front part of the frame 1. The dial plate 19 is rotatably connected inside the pair of fixed blocks 18. The dial rod 20 is rotatably connected to one side inside the dial plate 19. An arc-shaped groove 21 is formed in the front part of the dial rod 20. One-way rotating blocks 22 are rotatably connected to both the top and bottom of the dial plate 19. A clamping groove 24 is formed on the outer surface of the one-way rotating block 22. A clamping rod 23 is rotatably connected to the top of the dial plate 19. An arc-shaped plate 25 is fixedly connected to the top of the dial plate 19. Two first springs 26 are fixedly connected between the arc-shaped plate 25 and the clamping rod 23.

[0050] When a truck is about to pass through the air door, rotate the two door panels 2 separately. The door panel 2 on the left side rotates towards the front part of the frame 1, and the door panel 2 on the right side rotates towards the rear part of the frame 1. In this way, the frame 1 can be completely opened, providing enough space for the truck to pass through.

[0051] Rotate the dial plate 19 along the inside of the pair of fixed blocks 18. During the rotation of the dial plate 19, through the clamping connection between the one-way rotating block 22 and the clamping rod 23, the dial rod 20 is driven to rotate, and then the connecting rod 7 is pushed to rotate through the arc-shaped groove 21, thereby driving one door panel 2 to rotate separately.

[0052] During the counterclockwise rotation of the two door panels 2 that form a whole, since the centers of the arc-shaped grooves 21 and the anti-disengagement blocks 12 are on the same vertical line, during the counterclockwise rotation of the two door panels 2 that form a whole and drive the connecting rod 7 to rotate synchronously, the connecting rod 7 will pass through the arc-shaped groove 21, and at the same time, the door panel 2 will also squeeze the lever 20, causing the lever 20 to rotate clockwise relative to the dial plate 19, driving the one-way rotating block 22 to rotate clockwise synchronously, so that the inclined surface of the card slot 24 squeezes against the protrusion of the latch rod 23, causing the latch rod 23 to rotate, so that the lever 20 can rotate clockwise normally, so that the establishment of the switching structure 17 will not affect the normal operation of the negative pressure opening structure 3. When the two door panels 2 that form a whole are reset, the card slot 24 is engaged with the latch rod 23 again, thus preventing the two door panels 2 that form a whole from being reset too far.

[0053] In this embodiment, the card slot 24 is composed of an inclined surface and a vertical surface, and a protrusion is provided at the rear of the latch rod 23, and the rear protrusion of the latch rod 23 is adaptively matched with the card slot 24.

[0054] In this embodiment, the connecting rod 7 is located inside the arc-shaped groove 21, the centers of the arc-shaped groove 21 and the anti-disengagement block 12 are on the same vertical line, the top and bottom of the lever 20 respectively penetrate the top and bottom of the dial plate 19, and the top and bottom of the lever 20 are respectively fixedly connected to the two one-way rotating blocks 22 at the top and bottom.

[0055] In this embodiment, a full-through structure 27 is provided at the rear of the frame 1. The full-through structure 27 includes a pressing plate 29. A pair of bottom blocks 28 are provided at the rear of the frame 1. The pressing plate 29 is rotatably connected between the pair of bottom blocks 28. Straight rods 34 are fixedly connected inside the two pairs of fixing blocks 18 and respectively inside the two dial plates 19. A sliding block 35 is slidably connected to the outer surface of the straight rod 34 and inside the dial plate 19. A second spring 33 is fixedly connected between the top of the sliding block 35 and the fixing block 18. A spiral chute 36 is provided on the outer surface of the sliding block 35. A slider 37 is slidably connected to the bottom of the spiral chute 36. The slider 37 is fixedly connected to the inner wall of the dial plate 19. Two cables 32 are fixedly connected to the bottom of the sliding block 35. One end of the cable 32 is fixedly connected to the bottom of the pressing plate 29. A number of third springs 38 are fixedly connected to the bottom of the pressing plate 29.

[0056] The bottom ends of the third springs 38 and the bottom blocks 28 are both fixedly connected to the ground, and the bottom of the door panel 2 is flush with the ground.

[0057] When the truck presses over the top of the pressure plate 29, the pressure plate 29 rotates downward, thereby pulling the toggle block 35 downward through the cable 32. Since the toggle block 35 is only slidingly connected to the straight rod 34, the toggle block 35 does not rotate during the descent process. As a result, when the toggle block 35 slides downward, the slider 37 can rotate along the outer surface of the spiral slide groove 36, thereby forcing one door panel 2 to rotate automatically. Therefore, when the truck presses over the pressure plate 29, the door panel 2 can be automatically opened, and the two door panels 2 can rotate separately, so that the frame 1 can be fully opened.

[0058] The two toggle blocks 35 on the left and right sides are in an inverted relationship with each other, so the two spiral grooves 36 are also in an inverted relationship with each other. Therefore, the two toggle blocks 35 descend, causing the two sliders 37 to rotate in opposite directions along the two spiral grooves 36, thereby making the rotation directions of the two toggle plates 19 and the two door panels 2 similar.

[0059] In this embodiment, two pairs of mounting blocks 30 are fixedly connected to the left side of the front and the left side of the rear of the frame 1 . A pulley 31 is rotatably connected inside each pair of mounting blocks 30 , and the cable 32 is wound around the pulley 31 .

[0060] In this embodiment, the bottom of the bottom block 28 is at the same height as the bottom of the frame 1 , and the top of the pressing plate 29 is at a height higher than the bottom of the door panel 2 .

[0061] When the two door panels 2 rotate independently and synchronously in opposite directions, the insert block 15 will be disengaged from the slot 14, so that the two door panels 2 are no longer a whole.

[0062] It should be noted that the present invention is a dust suppression air door structure for mining. When in use, in the initial position, the slots 14 and the plug blocks 15 of the two door panels 2 are plugged into each other, so that the two door panels 2 form a whole. When personnel need to pass through the air door, since the output end of the electric double-headed cylinder 4 is rotatably connected to the connecting block 15, at this time, the two output ends of the electric double-headed cylinder 4 are pre-extended, but the two output ends of the electric double-headed cylinder 4 are restricted by the two connecting blocks 15 and cannot be extended, and at this time the electric double-headed cylinder 4 The extension force of the right output end is greater than the extension force of the left output end, and the power of the extension of the output end of the electric double-headed cylinder 4 is converted into a counterclockwise rotation force along the top of the frame 1 by the fixing ring 39 together with the anti-slip block 12, and then the two door panels 2 forming an integral body are rotated counterclockwise along the two rotating shafts 16 until the two door panels 2 forming an integral body are rotated counterclockwise by 90 degrees. At this time, the two door panels 2 block the interior of the frame 1 into two non-interconnected passages. At this time, people can pass through the two passages respectively, thereby separating people from the air outlet and air inlet.

[0063] During the counterclockwise rotation of the two door panels 2 forming a whole, since the air damper opening gradually increases from small, during this process, the air pressure at the rear of the air damper is higher than the air pressure at the front and rear of the air damper. Therefore, the air flow at the rear of the air damper will blow from the rear to the front, thus squeezing the two door panels 2 forming a whole. At the same time, during the counterclockwise rotation of the two door panels 2 forming a whole, the door panel 2 on the left side rotates forward compared to the frame 1, and the door panel 2 on the right side rotates backward compared to the frame 1. Therefore, its air flow will assist the door panel 2 on the left side to rotate forward and hinder the door panel 2 on the right side from rotating backward. Since the air flow acts on the two door panels 2 synchronously, the obstructive air flow and the assisting air flow acting on the two door panels 2 will form a two-force balance. Therefore, during the counterclockwise rotation of the two door panels 2 forming a whole, it will not be affected by the air pressure;

[0064] During the counterclockwise rotation of the two door panels 2 forming a whole, it will drive the two connecting blocks II 9 to rotate together, and the output ends of the two sub-cylinders 10 will extend synchronously, so as to support the bottom of the two door panels 2. Then, in cooperation with the electric double-headed cylinder 4 at the top, the top and bottom of the two door panels 2 will be supported synchronously, so that the door panels 2 can rotate smoothly;

[0065] When the truck is about to pass through the air damper, rotate the two door panels 2 separately. The door panel 2 on the left side rotates forward to the front of the frame 1, and the door panel 2 on the right side rotates backward to the rear of the frame 1, so that the frame 1 can be completely opened, thus having enough space to allow the truck to pass;

[0066] Rotate the dial 19 along the inside of a pair of fixed blocks 18. During the rotation of the dial 19, through the engagement of the one-way rotating block 22 and the clamping rod 23, it drives the dial rod 20 to rotate, and then drives the connecting rod 7 to rotate together through the arc-shaped groove 21, so as to drive a door panel 2 to rotate separately;

[0067] During the counterclockwise rotation of the two door panels 2 forming a whole, since the center of the arc-shaped groove 21 and the center of the anti-disengagement block 12 are on the same vertical line, during the process of the two door panels 2 forming a whole rotating counterclockwise and driving the connecting rod 7 to rotate synchronously, the connecting rod 7 will pass through the arc-shaped groove 21. At the same time, the door panel 2 will also squeeze the dial rod 20, making the dial rod 20 rotate clockwise compared to the dial 19, driving the one-way rotating block 22 to rotate clockwise synchronously, so that the inclined surface of the card slot 24 is squeezed against the protrusion of the clamping rod 23, making the clamping rod 23 rotate, so that the dial rod 20 can rotate clockwise normally, so that the establishment of the switching structure 17 will not affect the normal operation of the negative pressure opening structure 3. When the two door panels 2 forming a whole are reset, the card slot 24 is engaged with the clamping rod 23 again, thus preventing the two door panels 2 forming a whole from overshooting during reset;

[0068] When the truck passes over the top of the pressure plate 29, the pressure plate 29 rotates downward, thereby pulling the toggle block 35 downward through the cable 32. Since the toggle block 35 is only slidably connected to the straight rod 34, the toggle block 35 does not rotate during the descent process. As a result, when the toggle block 35 slides downward, the slider 37 can rotate along the outer surface of the spiral slide 36, thereby forcing one door panel 2 to rotate automatically. Therefore, when the truck passes over the pressure plate 29, the door panel 2 can be automatically opened, and the two door panels 2 can rotate independently, so that the frame 1 can be fully opened.

[0069] The two toggle blocks 35 on the left and right sides are in an inverted relationship with each other, so the two spiral grooves 36 are also in an inverted relationship with each other. Therefore, the two toggle blocks 35 descend, causing the two sliders 37 to rotate in opposite directions along the two spiral grooves 36, thereby causing the two toggle plates 19 and the two door panels 2 to rotate in opposite directions.

[0070] The basic principles, main features and advantages of the present invention are shown and described above. 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 modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A dust suppression air door structure for mine use, including a frame (1), and two door panels (2) are arranged inside the frame (1), characterized in that: At the top of the frame (1), a negative pressure opening structure (3) is provided. The negative pressure opening structure (3) includes an electric double-headed cylinder (4). At the center of the top of the frame (1), a fixing ring (39) is provided. The electric double-headed cylinder (4) is fixedly connected to the inside of the fixing ring (39). At the front left side of the left door panel (2) and at the rear right side of the right door panel (2), a pair of fixing blocks (6) are fixedly connected respectively. Inside the two pairs of fixing blocks (6), a connecting rod (7) is fixedly connected respectively. At the top of the two pairs of fixing blocks (6), a connecting block one (5) is fixedly connected respectively. The two output ends of the electric double-headed cylinder (4) are respectively rotationally connected to the two connecting blocks one (5). At the bottom of the fixing ring (39), an anti-detachment block (12) is fixedly connected. The anti-detachment block (12) is rotationally connected to the frame (1). At the center positions of the top and bottom inside the frame (1), a rotating shaft (16) is slidably connected. At the top and bottom of the two door panels (2), circular grooves (13) are jointly opened. On the mutually approaching surfaces of the two door panels (2), slots (14) are opened in a staggered manner in sequence. On the mutually approaching surfaces of the two door panels (2), inserting blocks (15) are fixedly connected in a staggered manner in sequence.

2. The structure of a dust suppression air door for mine use according to claim 1, wherein: The inserting block (15) is adaptively matched with the slot (14). On the mutually remote sides of the two door panels (2), a sealing gasket (11) is fixedly connected.

3. The structure of a dust suppression air door for mine use according to claim 1, characterized in that: The rotating shaft (16) is adaptively matched with the circular groove (13).

4. The structure of a dust suppression air door for mine use according to claim 2, characterized in that: At the bottom of the front part and the bottom of the rear part of the frame (1), a support block (8) is fixedly connected respectively. Inside the two support blocks (8), a sub-cylinder (10) is rotationally connected. At the bottom of the two pairs of fixing blocks (6), a connecting block two (9) is fixedly connected respectively. The output ends of the two sub-cylinders (10) are respectively rotationally connected to the two connecting blocks two (9).

5. The structure of a dust suppression air door for mine use according to claim 1, characterized in that: On the front and rear parts of the frame (1), a switching structure (17) is provided. The switching structure (17) includes a dial plate (19) and a dial rod (20). At the left side of the front part of the frame (1), a pair of fixed connection blocks (18) are fixedly connected. The dial plate (19) is rotationally connected to the inside of the pair of fixed connection blocks (18). The dial rod (20) is rotationally connected to the inside of the dial plate (19) near one side. An arc-shaped groove (21) is opened at the front part of the dial rod (20). At the top and bottom of the dial plate (19), a one-way rotating block (22) is rotationally connected respectively. On the outer surface of the one-way rotating block (22), a clamping groove (24) is opened. At the top of the dial plate (19), a clamping rod (23) is rotationally connected. At the top of the dial plate (19), an arc-shaped plate (25) is fixedly connected. Between the arc-shaped plate (25) and the clamping rod (23), two spring one (26) are fixedly connected.

6. The structure of a dust suppression air door for mine use according to claim 5, characterized in that: The clamping groove (24) is composed of an inclined plane and a vertical plane. At the rear part of the clamping rod (23), a protrusion is provided. The rear protrusion of the clamping rod (23) is adaptively matched with the clamping groove (24).

7. The structure of a dust suppression air door for mine use according to claim 5, characterized in that: The connecting rod (7) is located inside the arc-shaped groove (21). The center of the arc-shaped groove (21) and the center of the anti-detachment block (12) are on the same vertical line. The top and bottom of the dial rod (20) respectively penetrate through the top and bottom of the dial plate (19), and the top and bottom of the dial rod (20) are respectively fixedly connected to the two one-way rotating blocks (22) at the top and bottom.

8. The structure of a mine dust suppression air door according to claim 5, characterized in that: A through-structure (27) is provided at the rear of the frame (1). The through-structure (27) includes a pressing plate (29). A pair of bottom blocks (28) are provided at the rear of the frame (1). The pressing plate (29) is rotatably connected between the pair of bottom blocks (28). Inside the two pairs of fixing blocks (18) and respectively inside the two shifting plates (19), a straight rod (34) is fixedly connected. A shifting block (35) is slidably connected to the outer surface of the straight rod (34) and inside the shifting plate (19). A second spring (33) is fixedly connected between the top of the shifting block (35) and the fixing block (18). A spiral chute (36) is formed on the outer surface of the shifting block (35). A slider (37) is slidably connected to the inner part of the spiral chute (36) near the bottom. The slider (37) is fixedly connected to the inner wall of the shifting plate (19). Two cables (32) are fixedly connected to the bottom of the shifting block (35). One end of the cable (32) is fixedly connected to the bottom of the pressing plate (29). A number of third springs (38) are fixedly connected to the bottom of the pressing plate (29).

9. The structure of a dust suppression air door for mine use according to claim 8, characterized in that: Two pairs of mounting blocks (30) are fixedly connected to the front left side and the rear left side of the frame (1) respectively. A pulley (31) is rotatably connected inside each pair of mounting blocks (30). The cable (32) passes around the pulley (31).

10. A mine dust suppression air door structure according to claim 8, characterized in that: The height of the bottom of the bottom block (28) is the same as the height of the bottom of the frame (1). The height of the top of the pressing plate (29) is higher than the height of the bottom of the door panel (2).

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