An explosion-proof air door for mines

Abstract

The present application discloses an explosion-proof air door for a mine, which includes a door frame, an air door, an auxiliary door panel, an electromagnetic suction structure, two telescopic limiting structures and two resetting members; the door frame is slidably arranged in the mine roadway; the air door and the auxiliary door panel are rotatably connected to the door frame; the telescopic limiting structure includes a limiting frame, a connecting ear and a sliding rod; placing grooves are formed on both sides of the roadway, and the sliding rod is horizontally arranged in the placing groove; the limiting frame penetrates through the outer side of the door frame and is fixedly connected to the connecting ear, and the end of the limiting frame extending into the door frame clamps the side surface of the air door; the connecting ear penetrates through the sliding rod and can incline and slide along the length direction of the sliding rod; the resetting member is arranged in the roadway; the electromagnetic suction structure is arranged on the outer side of the auxiliary door panel. The present application realizes that when an explosion occurs in the roadway, the air door can be automatically opened for pressure relief, and after the explosion ends, the air door can be automatically closed to the locked state, avoiding damage to the air door, enabling the air door to continue to be used, ensuring the subsequent function of isolating ventilation, and reducing costs.

Description

Technical Field

[0001] This application relates to the technical field of mine air doors, and particularly to an explosion-proof air door for mines. Background Art

[0002] To ensure that the air flow in the mine flows in a predetermined direction, ventilation structures need to be set up in some roadways to control the air flow. In the mine roadway, air doors are set at positions where air flow is not allowed to pass through, but pedestrians or equipment need to pass through. The air door plays an indispensable role in the coal mine. Once a gas or coal dust explosion occurs in the coal mine, it will generate flame high temperature, shock wave overpressure and toxic and harmful gases, resulting in the casualties of a large number of workers in the confined space underground. At the same time, the shock wave will cause irreversible damage to the existing ordinary air doors. Once the structure of the air door is damaged, it will lose its function of blocking ventilation, changing the original ventilation situation underground, resulting in air flow short circuit, smoke and dust disorder, increase in the concentration of toxic and harmful gases and gas, spread of the disaster area, and decrease in oxygen concentration, which may further expand the explosion disaster or cause a secondary fire, and at the same time have an adverse impact on underground rescue and the surviving personnel underground.

[0003] The air doors in the prior art do not have explosion-proof functions. When an explosion occurs in the roadway, the shock wave will damage the air door, affecting its subsequent normal function of blocking ventilation. The air doors in the prior art cannot be used again after an explosion, and subsequent replacement is time-consuming and laborious, while increasing the replacement cost. Summary of the Invention

[0004] By providing an explosion-proof air door for mines, this application solves the technical problems in the prior art that the air door does not have an explosion-proof function. When an explosion occurs in the roadway, the shock wave will damage the air door and it cannot be used again, affecting its subsequent normal function of blocking ventilation. Subsequent replacement is time-consuming and laborious, while increasing the replacement cost. It realizes that when an explosion occurs in the roadway, the air door can automatically open for pressure relief. After the explosion ends, the air door can automatically close to the locked state, avoiding damage to the air door, enabling the air door to continue to be used, ensuring the subsequent function of blocking ventilation, and reducing the cost.

[0005] In a first aspect, an explosion-proof air door for a mine provided by the present application includes a door frame, an air door, an auxiliary door panel, an electromagnetic suction structure, two telescopic limiting structures, and two reset members; the door frame is arranged in a roadway of the mine, and the outer side of the door frame is slidably connected to the roadway; the air door and the auxiliary door panel are both arranged in the door frame, and the tops of the air door and the auxiliary door panel are respectively rotatably connected to the inner side of the door frame; the two telescopic limiting structures are symmetrically arranged on both sides of the door frame with respect to the center line of the door frame, and the telescopic limiting structure includes a limiting frame, a connecting ear, and a sliding rod; placing grooves are opened on both sides of the roadway, the sliding rod is horizontally arranged in the placing groove, and there is an included angle between the sliding rod and the length direction of the roadway; the limiting frame penetrates through the outer side of the door frame and is slidably connected to the door frame, the end of the limiting frame extending out of the door frame is fixedly connected to the connecting ear, and the end of the limiting frame extending into the door frame can clamp the side surface of the air door; the connecting ear penetrates through the sliding rod and is slidably connected to the outer side of the sliding rod, and can incline and slide along the length direction of the sliding rod; the two reset members are respectively on both sides of the roadway, and one end of the reset member is fixedly connected to the inner side of the roadway, and the other end of the reset member contacts the front side of the door frame; the electromagnetic suction structure is arranged on the outer side of the auxiliary door panel and can adsorb the auxiliary door panel on the top of the roadway after the auxiliary door panel is rotated and opened.

[0006] In combination with the first aspect, in a possible implementation manner, the electromagnetic suction structure includes an electromagnet, a connecting rod, and a fixed seat; the fixed seat is fixedly connected to the top of the roadway; the connecting rod is fixedly connected to the outer side of the auxiliary door panel; the electromagnet is fixedly connected to the end of the connecting rod away from the auxiliary door panel, and the electromagnet can be adsorbed on the fixed seat after being powered on.

[0007] In combination with the first aspect, in a possible implementation manner, the electromagnetic suction structure further includes two lapping components; the fixed seat is a groove-shaped structure, and the two lapping components are symmetrically arranged on the inner side of the fixed seat with respect to the center line of the fixed seat; the lapping component includes a turning plate and an elastic member, and a clamping groove is opened on the inner side of the fixed seat; one end of the turning plate extends into the clamping groove and is rotatably connected to the fixed seat; one end of the elastic member is fixedly connected to the top of the clamping groove, and the other end of the elastic member is fixedly connected to the top surface of the turning plate; the side surface of the electromagnet is a conical surface, and the diameter of the bottom surface of the electromagnet is greater than the distance between the two turning plates; the length of the turning plate is equal to the length of the fixed seat, a first damping layer is arranged on the top surface of the turning plate, and a second damping layer is arranged on the bottom surface of the electromagnet.

[0008] In combination with the first aspect, in a possible implementation manner, the limiting frame is of a U-shaped structure, and a U-shaped groove is formed inside the limiting frame; the width of the air door is not greater than the width of the U-shaped groove.

[0009] In combination with the first aspect, in a possible implementation manner, an explosion-proof air door for a mine provided by the present application further includes a controller and a contact sensor; the controller is arranged inside the roadway, the contact sensor is embedded inside the bottom end of the door frame and is directly below the air door; the electromagnetic suction structure and the contact sensor are respectively electrically connected to the controller.

[0010] In combination with the first aspect, in a possible implementation manner, an explosion-proof air door for a mine provided by the present application further includes a buffer member; the buffer member is arranged at the top of the roadway and is on the side of the electromagnetic suction structure away from the door frame.

[0011] In combination with the first aspect, in a possible implementation manner, a small door is arranged on the air door, and the small door is rotatably connected to the air door.

[0012] In combination with the first aspect, in a possible implementation manner, a pushing assembly is arranged on the side of the door frame away from the reset member, the pushing assembly is fixedly connected to the inside of the roadway, and the output end of the pushing assembly contacts the door frame and can push the door frame to move along the length direction of the roadway.

[0013] In a second aspect, the present application provides a method for using an explosion-proof air door for a mine, including: when an explosion occurs in the mine, the shock wave propagates along the inside of the roadway and first impacts the air door and the door frame; under the clamping action of the limit frame, the air door will slide along the length direction of the roadway as a whole with the door frame; by sliding the door frame along the inner side of the roadway, the reset member is gradually compressed, and at the same time, the connecting ear slides obliquely along the length direction of the sliding rod, so that the end of the limit frame extending into the door frame gradually retracts into the door frame and no longer blocks the air door; after that, under the impact force of the shock wave, the air door flips upward relative to the door frame and squeezes the auxiliary door panel to flip upward synchronously; after the bottom end of the air door leaves the door frame, control the electromagnetic suction structure to be energized, so that after the auxiliary door panel flips open, it is fixed to the top of the roadway through the electromagnetic suction structure; after the shock wave passes, continue to control the electromagnetic suction structure to be energized, and the auxiliary door panel continues to be fixed to the top of the roadway. At this time, the air door automatically flips downward by gravity and re-enters the door frame, and finally stops in a vertical state; after the air door maintains the vertical state, control the electromagnetic suction structure to be powered off, and the auxiliary door panel no longer has a pulling force on the door frame, so that the door frame slides along the reverse direction of the shock wave and returns to its original position under the restoring force of the reset member; during the process of the door frame returning to its original position, under the action of the connecting ear and the sliding rod, the end of the limit frame continues to extend into the interior of the door frame and clamps the outer side of the air door, so that the air door is in a closed and locked state under normal circumstances, preparing for the arrival of the next shock wave.

[0014] One or more technical solutions provided in the present application have at least the following technical effects or advantages:

[0015] In the present application, a door frame, an air door, an auxiliary door panel, an electromagnetic suction structure, two telescopic limit structures and two reset members are adopted; the tops of the air door and the auxiliary door panel are both rotatably connected to the inner side of the top end of the door frame. Under normal circumstances, the air door is locked inside the door frame by two telescopic limit structures, ensuring the normal function of the air door to cut off ventilation.

[0016] Furthermore, the door frame is slidably connected to the roadway. At the same time, the telescopic limit structure includes a limit frame, a connecting ear and a sliding rod. When an explosion occurs in the roadway, the shock wave will first impact the air door. Under the clamping action of the limit frame, the air door will first slide along the length direction of the roadway as a whole with the door frame. The door frame gradually squeezes the reset member, and at the same time, the connecting ear slides obliquely along the length direction of the sliding rod, so that the end of the limit frame extending into the door frame gradually retracts into the door frame and no longer blocks the air door, realizing the automatic unlocking between the air door and the door frame. After that, under the impact force of the shock wave, the air door flips upward relative to the door frame and squeezes the auxiliary door panel to flip upward synchronously.

[0017] Furthermore, control the electromagnetic suction structure arranged on the outer side of the auxiliary door panel to be energized, so that the auxiliary door panel can be adsorbed on the top of the roadway after being flipped and opened. After the shock wave passes, continue to control the electromagnetic suction structure to be energized, and the auxiliary door panel continues to be fixed on the top of the roadway. At this time, due to the pulling force of the auxiliary door panel on the door frame, the door frame will not return to its original position temporarily. At the same time, the air door automatically flips downward by gravity and re-enters the door frame, and finally stops in the vertical state, that is, within the time period when the auxiliary door panel has a temporary pulling force on the door frame, the air door can automatically flip downward and reach the vertical state in advance before the limiting frame re-enters the door frame again, waiting to be locked again by the limiting frame subsequently;

[0018] After the door frame is kept in the vertical state, control the electromagnetic suction structure to be powered off, and the auxiliary door panel no longer has a pulling force on the door frame, so that the door frame slides along the reverse direction of the shock wave and returns to its original position under the restoring force of the resetting member. At the same time, under the action of the connecting ear and the sliding rod, the end of the limiting frame continues to extend into the interior of the door frame and clamps the outer side of the air door, so that the air door remains in the closed and locked state after the shock wave passes;

[0019] It effectively solves the technical problems in the prior art that the air door does not have an explosion-proof function. When an explosion occurs in the roadway, the shock wave will damage the air door and it cannot be used again, affecting its subsequent normal function of separating ventilation. The subsequent replacement is time-consuming and laborious, and at the same time increases the replacement cost. It realizes that when an explosion occurs in the roadway, the air door can automatically open for pressure relief. After the explosion ends, the air door can automatically close to the locked state, avoiding damage to the air door, enabling the air door to continue to be used, ensuring the subsequent function of separating ventilation, and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments of the present invention or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a side view of an explosion-proof air door for a mine provided by an embodiment of the present application when locked under normal circumstances;

[0022] Figure 2 It is a schematic side view structure of an explosion-proof air door for a mine provided by an embodiment of the present application when it is flipped upward and opened under the action of a shock wave;

[0023] Figure 3 For Figure 1Schematic cross-sectional structure diagram in the A-A direction;

[0024] Figure 4 It is Figure 3 Schematic structure diagram when the reset part is compressed and the air door is unlocked in [the figure];

[0025] Figure 5 It is Figure 3 Partial enlarged view of area B in [the figure];

[0026] Figure 6 It is Figure 4 Partial enlarged view of area C in [the figure];

[0027] Figure 7 Schematic structure diagram of an explosion-proof air door for mine use provided by an embodiment of the present application when the electromagnet continues to be powered on after the shock wave;

[0028] Figure 8 It is Figure 7 Partial enlarged view of area D in [the figure];

[0029] Figure 9 It is Figure 8 Cross-sectional view in the E-E direction in [the figure];

[0030] Figure 10 It is Figure 9 Schematic structure diagram when the electromagnet squeezes the turning plate during the process of entering the fixed seat in [the figure];

[0031] Figure 11 It is Figure 9 Schematic structure diagram when the electromagnet drops and overlaps on the turning plate after the electromagnet is powered off;

[0032] Figure 12 It is Figure 7 Schematic structure diagram when the electromagnet slides out of the fixed seat after the electromagnet is powered off in [the figure];

[0033] Figure 13 Axonometric view of the door frame, air door, limit frame, connecting ear and small door opening provided by an embodiment of the present application;

[0034] Figure 14 It is Figure 2 Schematic structure diagram when a buffer part is added in [the figure];

[0035] Figure 15 It is Figure 3 Schematic structure diagram when a pushing component is added in [the figure].

[0036] Reference numerals: 1 - door frame; 2 - air door; 3 - auxiliary door panel; 4 - electromagnetic suction structure; 41 - electromagnet; 42 - connecting rod; 43 - fixed seat; 431 - clamping groove; 44 - lapping component; 441 - flipping plate; 442 - elastic member; 443 - first damping layer; 444 - second damping layer; 5 - telescopic limiting structure; 51 - limiting frame; 52 - connecting ear; 53 - sliding rod; 6 - reset member; 61 - fixed block; 7 - roadway; 71 - placing groove; 72 - buffer member; 8 - controller; 9 - contact sensor; 10 - small door; 11 - pushing component. Detailed implementation manners

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. The terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "mounted", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0039] Refer to Figure 1-7, An explosion-proof air door for a mine provided by an embodiment of the present application includes a door frame 1, an air door 2, an auxiliary door panel 3, an electromagnetic suction structure 4, two telescopic limit structures 5 and two reset members 6; the door frame 1 is arranged in a roadway 7 of the mine, and the outer side of the door frame 1 is slidably connected to the roadway 7; both the air door 2 and the auxiliary door panel 3 are arranged in the door frame 1, and the tops of the air door 2 and the auxiliary door panel 3 are respectively rotatably connected to the inner side of the door frame 1; the two telescopic limit structures 5 are symmetrically arranged on both sides of the door frame 1 with respect to the center line of the door frame 1, and the telescopic limit structure 5 includes a limit frame 51, a connecting ear 52 and a sliding rod 53; placing grooves 71 are opened on both sides of the roadway 7, the sliding rod 53 is horizontally arranged in the placing groove 71, and there is an included angle between the sliding rod 53 and the length direction of the roadway 7; the limit frame 51 penetrates through the outer side of the door frame 1 and is slidably connected to the door frame 1, the end of the limit frame 51 extending out of the door frame 1 is fixedly connected to the connecting ear 52, and the end of the limit frame 51 extending into the door frame 1 can clamp the side surface of the air door 2; the connecting ear 52 penetrates through the sliding rod 53 and is slidably connected to the outer side of the sliding rod 53, and can incline and slide along the length direction of the sliding rod 53; the two reset members 6 are respectively on both sides of the roadway 7, and one end of the reset member 6 is fixedly connected to the inner side of the roadway 7, and the other end of the reset member 6 contacts the front side of the door frame 1; the electromagnetic suction structure 4 is arranged on the outer side of the auxiliary door panel 3, and can adsorb the auxiliary door panel 3 on the top of the roadway 7 after the auxiliary door panel 3 is rotated and opened.In the embodiment of the present application, a chute is specifically arranged on the outer side of the door frame 1, and a slide rail is arranged on the inner side of the roadway 7, so that the door frame 1 can slide along the length direction of the roadway 7 through the cooperation of the chute and the slide rail. The reset member 6 is selected as a spring. Specifically, a fixed block 61 is arranged on the inner side of the roadway 7, and the reset member 6 is fixedly connected to the inner side of the roadway 7 through the fixed block 61. The top ends of the air door 2 and the auxiliary door panel 3 are both hinged to the inner side of the top end of the door frame 1, so that when the air door 2 is turned upwards to open, it can squeeze the auxiliary air door 2 to turn upwards and open synchronously. When the shock wave impacts the air door 2 and causes the air door 2 to turn upwards and open, by arranging the auxiliary door panel 3, the impact between the air door 2 and the top of the roadway 7 can be reduced, which plays a certain protective role for the air door 2; specifically, when arranging the slide bar 53, the slide bar 53 is horizontal and fixedly connected in the placement groove 71, and the two slide bars 53 tend to open on both sides of the roadway 7 along the direction of the shock wave. The through hole on the connecting ear 52 is sleeved on the outer side of the slide bar 53. Thus, when the door frame 1 moves along the direction of the shock wave, the connecting ear 52 simultaneously slides obliquely along the outer side of the slide bar 53, and finally pulls the two limiting frames 51 to separate towards both sides of the roadway 7. Eventually, the end portion of the limiting frame 51 extending into the door frame 1 can be retracted into the door frame 1 and no longer block the air door 2. After that, the air door 2 can be turned upwards and opened under the action of the shock wave, and at the same time drive the auxiliary door panel 3 to turn upwards and open to achieve pressure relief; when the air door 2 is turned upwards and opened, the electromagnetic suction structure 4 is controlled to be energized, so that the auxiliary door panel 3 can be adsorbed on the top of the roadway 7 after being turned open. By fixing the auxiliary door panel 3 on the top of the roadway 7, when the shock wave passes through the door frame 1 and the air door 2, it can fix the door frame 1, reduce the vibration of the door frame 1, and effectively protect the door frame 1; after the shock wave passes, the electromagnetic suction structure 4 is continuously controlled to be energized, and the auxiliary door panel 3 continues to be fixed on the top of the roadway 7. At this time, due to the pulling force of the auxiliary door panel 3 on the door frame 1, the door frame 1 will not return to its original position temporarily. At the same time, the air door 2 automatically turns downwards by gravity and re-enters the door frame 1, and finally stops at the vertical state. After the door frame 1 maintains the vertical state, the electromagnetic suction structure 4 is controlled to be powered off, and the auxiliary door panel 3 no longer has a pulling force on the door frame 1, so that the door frame 1 slides along the reverse direction of the shock wave and returns to its original position under the restoring force of the reset member 6. At the same time, under the action of the connecting ear 52 and the slide bar 53, the end portion of the limiting frame 51 continues to extend into the door frame 1 and clamps the outer side of the air door 2, so that the air door 2 remains in the closed and locked state after the shock wave passes.

[0040] Refer to Figure 2 、 8, the electromagnetic attraction structure 4 includes an electromagnet 41, a connecting rod 42 and a fixing seat 43; the fixing seat 43 is fixedly connected to the top of the lane 7; the connecting rod 42 is fixedly connected to the outside of the auxiliary door panel 3; the electromagnet 41 is fixedly connected to the end of the connecting rod 42 away from the auxiliary door panel 3, and the electromagnet 41 can be adsorbed on the fixing seat 43 after being energized. In the embodiment of the present application, the electromagnetic attraction structure 4 is specifically provided to include an electromagnet 41, a connecting rod 42 and a fixing seat 43, wherein the electromagnet 41 is fixed to the outside of the auxiliary door panel 3 through the connecting rod 42, and the fixing seat 43 is fixed to the top of the lane 7, and specifically, the auxiliary door panel 3 is flipped upward by controlling the energization of the electromagnet 41, and then adsorbed on the fixing seat 43 by the electromagnet 41, and then fixed to the top of the lane 7, or the electromagnet 41 is controlled to be de-energized to achieve automatic separation from the top of the lane 7.

[0041] Reference Figure 2 , 8-12, the electromagnetic attraction structure 4 further includes two latching components 44; the fixed seat 43 is of a groove-shaped structure, and the two latching components 44 are symmetrically arranged on the inner side of the fixed seat 43 with respect to the center line of the fixed seat 43; the latching component 44 includes a turning plate 441 and an elastic member 442, and a latching groove 431 is formed on the inner side of the fixed seat 43; one end of the turning plate 441 extends into the latching groove 431 and is rotatably connected to the fixed seat 43; one end of the elastic member 442 is fixedly connected to the top of the latching groove 431, and the other end of the elastic member 442 is fixedly connected to the top surface of the turning plate 441; the side surface of the electromagnet 41 is a conical surface, and the diameter of the bottom surface of the electromagnet 41 is greater than the distance between the two turning plates 441; the length of the turning plate 441 is equal to the length of the fixed seat 43, and a first damping layer 443 is arranged on the top surface of the turning plate 441, and a second damping layer 444 is arranged on the bottom surface of the electromagnet 41.In the embodiment of the present application, it is further considered that after the shock wave passes, the damper 2 automatically flips downward and reaches the vertical state in advance before the door frame 1 is reset, ensuring that the door frame 1 can be re-entered into the door frame 1 through the limiting frame 51 after the subsequent reset, so as to continue to lock the damper 2. However, it should be further noted that during the reset of the door frame 1, the damper 2 will swing toward the side of the auxiliary door panel 3 due to its inertia. If the door frame 1 is reset too quickly, the swing of the damper 2 will be more obvious, affecting the re-locking of the damper 2 by the limiting frame 51. The embodiment of the present application further provides a lap assembly 44, so that after the damper 2 reaches the vertical state, the electromagnet 41 is controlled to be powered off, the auxiliary door panel 3 is no longer fixed to the top of the lane 7, and then the electromagnet 41 drops by gravity and overlaps the top surface of the two flip plates 441, that is, the auxiliary door panel 3 will not flip down directly, but will be overlapped on the two flip plates 441 as a whole, and then under the action of the reset member 6, as the door frame 1 moves in the opposite direction of the shock wave as a whole, the auxiliary door panel 3 passes through the second damping layer 444 on the bottom surface of the electromagnet 41 and the flip plate 441 during the movement. The first damping layer 443 on the top surface of 41 performs smooth sliding damping, so that the speed of the door frame 1 will not be too fast during the overall resetting process, thereby greatly reducing the inertia of the damper 2, and preventing the damper 2 from being unable to be re-engaged and locked with the limit frame 51 due to excessive swinging. When the door frame 1 returns to its original position, the electromagnet 41 slides out of the fixing seat 43 at the same time, and the auxiliary door panel 3 automatically flips downward under the action of gravity and finally reaches a vertical state. At this time, the auxiliary door panel 3 also enters the door frame 1. At this point, all resetting actions have been completed; as for the first damping layer The damping coefficients of 443 and the second damping layer 444 can be reasonably selected and used according to actual conditions and multiple tests; as for the auxiliary door panel 3, when it flips upward, the two flip plates 441 will be gradually squeezed by the conical surface set by the electromagnet 41, and finally the electromagnet 41 passes through the two flip plates 441 and is adsorbed in the fixed seat 43. After the electromagnet 41 is adsorbed on the fixed seat 43, the two flip plates 441 are abutted against the bottom surface of the clamping groove 431 under the action of the elastic member 442, and maintain a horizontal state, waiting for the electromagnet 41 to be powered off, and then it is used to overlap the electromagnet 41.

[0042] Reference Figure 5-6 13, the limiting frame 51 is a U-shaped structure, and a U-shaped groove 511 is provided inside the limiting frame 51; the width of the damper 2 is not greater than the width of the U-shaped groove 511. In the embodiment of the present application, the limiting frame 51 is further configured as a U-shaped structure, which can block both sides of the damper 2, thereby ensuring the locking function of the damper 2 under normal circumstances.

[0043] Reference Figure 1 , 27. An explosion-proof damper for mines provided in the embodiment of the present application also includes a controller 8 and a contact sensor 9; the controller 8 is arranged on the inner side of the tunnel 7, and the contact sensor 9 is embedded on the inner side of the bottom end of the door frame 1 and is directly below the damper 2; the electromagnetic attraction structure 4 and the contact sensor 9 are electrically connected to the controller 8, respectively. In the embodiment of the present application, the power on and off of the electromagnet 41 is specifically controlled by the controller 8 and the contact sensor 9, that is, under normal circumstances, when the damper 2 and the auxiliary door panel 3 are in the door frame 1, the contact sensor 9 senses the damper 2. At this time, the contact sensor 9 sends a signal to the controller 8, and the controller 8 controls the electromagnet 41 to be in a power-off state. When an explosion occurs in the tunnel 7, the limit frame 51 retracts. After the shock wave impacts the damper 2 to open, the contact sensor 9 cannot sense the damper 2 and sends a signal to the controller 8. At this time, the controller 8 controls the electromagnet 41 to be powered on. Subsequently, the damper 2 is opened. After the door 2 impacts the auxiliary door panel 3 to flip upward and open, the auxiliary door panel 3 is adsorbed on the fixed seat 43 by the electromagnet 41. After the shock wave passes, the damper 2 automatically flips downward by gravity and finally stops in a vertical state. The contact sensor 9 continues to sense that the damper 2 has returned to its position and sends a signal to the controller 8. The controller 8 controls the electromagnet 41 to cut off the power. Subsequently, the electromagnet 41 falls and overlaps the two flip plates 441. Through the action of the reset member 6, the door frame 1 is finally reset and the electromagnet 41 slides out of the fixed seat 43. The auxiliary door panel 3 finally automatically flips downward to a vertical state.

[0044] Reference Figure 14 The explosion-proof damper for mine provided in the embodiment of the present application further includes a buffer 72; the buffer 72 is arranged at the top of the tunnel 7 and is located on the side of the electromagnetic attraction structure 4 away from the door frame 1. In the embodiment of the present application, the buffer 72 is a spring, and the buffer 72 is further arranged so that when the damper 2 and the auxiliary door plate 3 are turned upward under the action of the shock wave, the buffer 72 is used for buffering, thereby reducing the impact force between the electromagnet 41 and the fixing seat 43.

[0045] Reference Figure 13 A small door 10 is provided on the damper 2, and the small door 10 is rotatably connected to the damper 2. In the embodiment of the present application, a small door 10 is provided on the damper 2, and the small door 10 is locked on the damper 2 by a common opening and closing lock. When a person passes through the lane 7, the small door 10 is opened to facilitate the person to pass through.

[0046] Reference Figure 15, a pushing component 11 is provided on the side of the door frame 1 away from the reset member 6. The pushing component 11 is fixedly connected to the inner side of the lane 7, and the output end of the pushing component 11 contacts the door frame 1, and can push the door frame 1 to move along the length direction of the lane 7. In the embodiment of the present application, considering that the lane 7 has a small cross-section and is not suitable for opening a small door 10 on the damper 2, a pushing component 11 can be provided. When a person needs to pass through the lane 7, the pushing component 11 is started, and the door frame 1 is pushed to move along the lane 7 by the pushing component 11, so that the damper 2 can be unlocked by the limit frame 51. After unlocking, the person can push the damper 2 to open it and pass through the lane 7. After passing, the pushing component 11 is controlled to retract and no longer squeeze the door frame 1. Under the action of the reset member 6, the door frame 1 automatically returns to its original position and locks the damper 2.

[0047] The embodiment of the present application provides a method for using an explosion-proof air door for a mine, comprising: when an explosion occurs in the mine, the shock wave propagates along the inside of the tunnel 7 and first impacts the air door 2 and the door frame 1; the air door 2, under the clamping action of the limit frame 51, will slide along the length direction of the tunnel 7 along with the door frame 1 as a whole; the door frame 1 slides along the inner side of the tunnel 7, so that the reset member 6 is gradually compressed, and at the same time, the connecting ear 52 slides obliquely along the length direction of the slide rod 53, so that the end of the limit frame 51 extending into the door frame 1 gradually retracts into the door frame 1 and no longer blocks the air door 2; thereafter, under the impact force of the shock wave, the air door 2 flips upward relative to the door frame 1 and opens, and squeezes the auxiliary door panel 3 to flip upward synchronously and open; after the bottom end of the air door 2 leaves the door frame 1, the electromagnetic attraction structure 4 is controlled to be energized, so that the auxiliary door panel 3 flips and opens. After opening, it is fixed to the top of the tunnel 7 by the electromagnetic attraction structure 4; after the shock wave passes, the electromagnetic attraction structure 4 is continuously controlled to be energized, and the auxiliary door panel 3 is continuously fixed to the top of the tunnel 7. At this time, the damper 2 automatically flips downward by gravity, and re-enters the door frame 1, and finally swings to a vertical state; after the damper 2 maintains the vertical state, the electromagnetic attraction structure 4 is controlled to be de-energized, and the auxiliary door panel 3 no longer has a pulling force on the door frame 1, so that the door frame 1 slides in the opposite direction of the shock wave and returns to its original position under the action of the restoring force of the reset member 6; in the process of the door frame 1 returning to its original position, under the action of the connecting ear 52 and the sliding rod 53, the end of the limit frame 51 continues to extend into the interior of the door frame 1, and clamps the outer side of the damper 2, so that the damper 2 is in a closed and locked state under normal circumstances, ready for the arrival of the next shock wave.

[0048] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0049] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting the present application; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. An explosion-proof damper for mines, It is characterized in that It comprises a door frame (1), a damper (2), an auxiliary door plate (3), an electromagnetic suction structure (4), two telescopic limit structures (5) and two reset parts (6); The door frame (1) is arranged in a tunnel (7) of a mine, and the outer side of the door frame (1) is slidably connected to the tunnel (7); The damper (2) and the auxiliary door plate (3) are both arranged in the door frame (1), and the top ends of the damper (2) and the auxiliary door plate (3) are respectively rotatably connected to the inner side of the door frame (1); The two telescopic limiting structures (5) are symmetrically arranged on both sides of the door frame (1) with respect to the center line of the door frame (1), and the telescopic limiting structures (5) include a limiting frame (51), a connecting ear (52) and a sliding rod (53); Placement grooves (71) are provided on both sides of the lane (7), the slide bar (53) is horizontally arranged in the placement grooves (71), and an angle exists between the slide bar (53) and the length direction of the lane (7); The limiting frame (51) passes through the outer side of the door frame (1) and is slidably connected to the door frame (1); the end of the limiting frame (51) extending out of the door frame (1) is fixedly connected to the connecting ear (52); the end of the limiting frame (51) extending into the door frame (1) can clamp the side of the damper (2); The connecting ear (52) passes through the sliding rod (53) and is slidably connected to the outer side of the sliding rod (53), and can slide obliquely along the length direction of the sliding rod (53); The two reset members (6) are respectively located on both sides of the lane (7), and one end of the reset member (6) is fixedly connected to the inner side of the lane (7), and the other end of the reset member (6) is in contact with the front side of the door frame (1); The electromagnetic attraction structure (4) is arranged on the outside of the auxiliary door panel (3), and can adsorb the auxiliary door panel (3) on the top of the lane (7) after the auxiliary door panel (3) is rotated and opened.

2. The explosion-proof air door for mines according to claim 1, It is characterized in that The electromagnetic attraction structure (4) comprises an electromagnet (41), a connecting rod (42) and a fixing seat (43); The fixing seat (43) is fixedly connected to the top of the lane (7); The connecting rod (42) is fixedly connected to the outer side of the auxiliary door panel (3); The electromagnet (41) is fixedly connected to the end of the connecting rod (42) away from the auxiliary door panel (3), and the electromagnet (41) can be adsorbed on the fixing seat (43) after being energized.

3. The explosion-proof air door for mines according to claim 2, It is characterized in that The electromagnetic attraction structure (4) further comprises two overlapping components (44); The fixing seat (43) is a groove-shaped structure, and the two overlapping components (44) are symmetrically arranged on the inner side of the fixing seat (43) with respect to the center line of the fixing seat (43); The overlapping assembly (44) comprises a flip plate (441) and an elastic member (442), and a clamping groove (431) is provided on the inner side of the fixing seat (43); One end of the flip plate (441) extends into the clamping groove (431) and is rotatably connected to the fixing seat (43); One end of the elastic member (442) is fixedly connected to the top of the clamping groove (431), and the other end of the elastic member (442) is fixedly connected to the top surface of the flip plate (441); The side surface of the electromagnet (41) is configured as a conical surface, and the diameter of the bottom surface of the electromagnet (41) is greater than the distance between the two flip plates (441); The length of the flip plate (441) is equal to the length of the fixing seat (43), the top surface of the flip plate (441) is provided with a first damping layer (443), and the bottom surface of the electromagnet (41) is provided with a second damping layer (444).

4. The explosion-proof air door for mines according to claim 1, It is characterized in that The limiting frame (51) is a U-shaped structure, and a U-shaped groove is provided inside the limiting frame (51); The width of the damper (2) is no greater than the width of the U-shaped groove.

5. The explosion-proof damper for mine according to claim 1, It is characterized in that Also includes a controller (8) and a contact sensor (9); The controller (8) is arranged on the inner side of the lane (7), and the contact sensor (9) is embedded on the inner side of the bottom end of the door frame (1) and is located directly below the damper (2); The electromagnetic attraction structure (4) and the contact sensor (9) are electrically connected to the controller (8) respectively.

6. The explosion-proof air door for mines according to claim 1, It is characterized in that Also includes a buffer member (72); The buffer member (72) is arranged at the top of the lane (7) and is located on the side of the electromagnetic attraction structure (4) facing away from the door frame (1).

7. The explosion-proof air door for mine according to claim 1, It is characterized in that The damper (2) is provided with a small door (10), and the small door (10) is rotatably connected to the damper (2).

8. The explosion-proof air door for mines according to claim 1, It is characterized in that A pushing component (11) is provided on the side of the door frame (1) facing away from the reset member (6); the pushing component (11) is fixedly connected to the inner side of the lane (7); and an output end of the pushing component (11) is in contact with the door frame (1), so as to push the door frame (1) to move along the length direction of the lane (7).

9. A method for using an explosion-proof damper for a mine, based on the explosion-proof damper for a mine according to any one of claims 1 to 6, It is characterized in that include: When an explosion occurs in the mine, the shock wave propagates along the interior of the tunnel (7) and first impacts the damper (2) and the door frame (1); Under the clamping action of the limiting frame (51), the damper (2) will slide along the length direction of the lane (7) along with the door frame (1) as a whole; By sliding the door frame (1) along the inner side of the roadway (7), the reset member (6) is gradually compressed, and at the same time, the connecting ear (52) slides obliquely along the length direction of the sliding rod (53), so that the end of the limiting frame (51) extending into the door frame (1) gradually retracts into the door frame (1) and no longer blocks the air door (2). After that, under the impact force of the shock wave, the air door (2) flips upward relative to the door frame (1) and opens, and squeezes the auxiliary door panel (3) to flip upward synchronously and open. After the bottom end of the air door (2) leaves the door frame (1), control the electromagnetic suction structure (4) to be energized, so that after the auxiliary door panel (3) flips open, it is fixed to the top of the roadway (7) through the electromagnetic suction structure (4). After the shock wave passes, continue to control the electromagnetic suction structure (4) to be energized, and the auxiliary door panel (3) continues to be fixed to the top of the roadway (7). At this time, the air door (2) automatically flips downward by gravity and re-enters the door frame (1), and finally stops in the vertical state. After the air door (2) maintains the vertical state, control the electromagnetic suction structure (4) to be powered off, and the auxiliary door panel (3) no longer has a pulling force on the door frame (1), so that the door frame (1) slides along the reverse direction of the shock wave under the restoring force of the reset member (6) and returns to its original position. During the process of the door frame (1) returning to its original position, under the action of the connecting ear (52) and the sliding rod (53), the end of the limiting frame (51) continues to extend into the interior of the door frame (1) and clamps the outer side of the air door (2), so that the air door (2) is in a closed and locked state under normal circumstances, preparing for the arrival of the next shock wave.

Images