Intelligent opening, closing and resetting linkage device and method for explosion-proof cover of ventilator

Abstract

The present invention relates to the technical field of explosion-proof covers, and more specifically, the present invention provides an intelligent opening, closing and resetting linkage device and method for a ventilator explosion-proof cover. By setting a first extension cylinder, a second extension cylinder, a correction mechanism and an oil seal groove, the first extension cylinder and the second extension cylinder are spliced ​​together to erect a cover body, and the cover body is connected to a lifting cylinder. The lifting cylinder is responsible for lifting the cover body during daily use. When a shock wave occurs, the lifting of the cover body can be limited to a certain extent to reduce deviation, and the correction mechanism can limit and correct the cover body in real time when the cover body contacts the shock wave, ensuring that the cover body and the inner through pipe can be stably and positively lifted, reducing tilting and equipment damage.

Description

Technical Field

[0001] The present invention relates to the technical field of explosion-proof covers, and more specifically to an intelligent opening, closing and resetting linkage device and method for an explosion-proof cover of a ventilator. Background Art

[0002] The explosion-proof cover is a device installed on the main fan, mainly used to prevent explosion accidents in dangerous environments. When a gas or coal dust explosion occurs underground, its powerful shock wave will directly break open the explosion-proof door or cover, and the energy will be released, thus ensuring that the fan is intact.

[0003] During the operation of the main fan, the opening and closing of the explosion-proof cover plays a vital role. When a gas explosion or coal dust explosion occurs underground, the staff will control the lifting device or increase the weight of the counterweight by controlling the external controller to make the explosion-proof cover easy to open, relieve the explosion pressure in the well, and prevent the explosion shock wave from damaging the ventilation main fan. However, in actual operation, the explosion-proof cover may not be accurately reset after lifting. During resetting, if the cover of the explosion-proof cover tilts in the ventilation duct, the staff will need to intervene manually to straighten the explosion-proof cover and place it in the ventilation duct before it can be used again.

[0004] For this reason, explosion-proof covers with automatic resetting and intelligent opening and closing have appeared on the market. For example, a limiting mechanism is used to limit and lift the four sides of the explosion-proof cover. However, the contact part between the lower end face of the explosion-proof cover and the ventilation shaft mouth will be tilted due to the uneven shock wave during the pressure relief process and the frame amount caused by long-term use of the limiting device. At this time, the impact force will directly rush out the cover body at an inclined angle. At this time, the force is applied to the limiting device, lifting cylinder and frame, which will cause damage to the limiting device, lifting cylinder and frame, causing damage to the company's production. Summary of the invention

[0005] The object of the present invention is to provide an intelligent opening, closing and resetting linkage device for an explosion-proof cover of a ventilator to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an intelligent opening, closing and resetting linkage device for explosion-proof cover of a ventilator, comprising a bottom ring and a fixed ring coaxially arranged outside the bottom ring, four brackets are arranged in a circumferential array on the upper end surface of the fixed ring, and beams are installed on the top ends of the four brackets, and lifting cylinders are connected to the end surfaces of the four beams close to each other, and a cover body is connected between the ends of the four lifting cylinders;

[0007] The upper end surface of the bottom ring is coaxially connected to a second extension tube, the upper end of the second extension tube is also spliced ​​with a first extension tube, the annular circumferential array of the first extension tube is provided with four correction mechanisms, the lower end surface of the cover body is coaxially connected to an inner through-tube, and the cover body is inserted into the first extension tube through the inner through-tube, and the top ends of the four correction mechanisms are connected to the outer annular surface of the cover body;

[0008] The single correction mechanism includes a mounting hole opened on the annular surface of the first extension tube, a rotating column installed inside the mounting hole, and a correction rod rotatably connected to the outside of the rotating column, one end of the correction rod located inside the first extension tube is attached to the outer annular surface of the inner tube, the other end of the correction rod extends to the outside of the mounting hole and is connected to a correction block, and an auxiliary fixing mechanism is provided on the side of the correction block close to the cover body, and a fixing groove is also provided on the outer annular surface of the cover body at a position corresponding to the auxiliary fixing mechanism, and the auxiliary fixing mechanism is inserted into the fixing groove.

[0009] A further technical solution of the present application is as follows: the auxiliary fixing mechanism includes an installation cavity opened inside the correction block, a rebound spring with one end installed on the inner wall of the installation cavity, and a fixing pin connected to the other end of the rebound spring, the fixing pin is slidably installed in the installation cavity, and the fixing pin extends away from the other end of the rebound spring to the outside of the installation cavity and is plugged into the fixing groove.

[0010] A further technical solution of the present application is: the fixing pin is trapezoidal in shape, and the other end of the rebound spring is connected to the long side of the fixing pin, the lower end of the short side of the fixing pin is provided with an arc chamfer, and the number of the rebound springs is several.

[0011] A further technical solution of the present application is as follows: four trigger blocks are arranged on the outer surface of the inner tube at positions corresponding to the correction rod, one end of the correction rod being inside the first extension tube is fitted to the outside of the trigger rod, the side of the trigger rod away from the first extension tube is a slope structure, and the slope structure of the trigger rod is inclined from bottom to top in a direction close to the extension tube, and the upper and lower ends of the trigger rod are rounded structures.

[0012] A further technical solution of the present application is: a bottom ring is provided at the inner end of the first extension tube, and the end of the inner tube extends to the lower end surface of the bottom ring, an extension portion is provided at one end of the inner tube located at the lower end surface of the bottom ring, a sealing mechanism is connected to the lower end surface of the first extension tube, and the sealing mechanism is connected to the outer annular surface of the extension portion, a sealing portion is formed on the upper end surface of the second extension tube, and the sealing mechanism is inserted into the sealing portion.

[0013] A further technical solution of the present application is as follows: the sealing mechanism includes a connecting ring, a rubber ring which is sleeved on the outer ring surface of the connecting ring and can be turned over, and a threaded connecting hole which penetrates through the connecting ring and the extension part. The connecting ring is sleeved on the outer ring surface of the extension part and is connected to the threaded connecting hole through external bolts. The rubber ring is mounted in the sealing part. The shape of the sealing part is an annular inclined surface which gradually inclines from the outer ring to the inner ring. The shape of the rubber ring is adapted to the shape of the sealing part, and the rubber ring can be turned over by adhering to the outer ring surface of the connecting ring.

[0014] A further technical solution of the present application is as follows: a plurality of positioning grooves are evenly distributed on the annular inclined surface of the sealing part, a plurality of positioning blocks are correspondingly provided on the inclined surface of the rubber ring close to the sealing part, the positioning blocks are spliced ​​in the positioning groove, and the inner sides of the positioning groove are inclined surfaces inclined from top to bottom.

[0015] A further technical solution of the present application is as follows: four oil seal grooves are evenly distributed on the upper end surface of the first extension tube, and the four oil seal grooves are located in the gaps between the four mounting holes; an oil seal strip is connected to the position of the lower end surface of the cover body corresponding to the oil seal groove, and the oil seal strip is inserted into the oil seal groove; an expansion groove is also provided at the bottom of a single oil seal groove.

[0016] A further technical solution of the present application is that the upper end surfaces of the four beams are all provided with cylinder pins, and the cylinder pins are connected to the lifting cylinders, and the side surfaces of the beams are also connected to one end of a limiting column, and the other end of the limiting column abuts against the upper end surface of the cover body.

[0017] A method for intelligent opening, closing and resetting linkage device of explosion-proof cover of a ventilator, the method comprising the following steps:

[0018] When in use, firstly, the bottom ring and the fixing ring are arranged at the wellhead of the ventilation shaft, the bottom ring is connected to the wellhead of the ventilation shaft, the first extension cylinder, the second extension cylinder and the cover body are sequentially erected, and the lifting cylinder is connected to the cover body to seal the wellhead of the ventilation shaft;

[0019] Subsequently, during actual use, during normal ventilation, the cover body is lifted by the lifting cylinder, so that the cover body is in contact and connected with the first extension tube to achieve the pressure relief ventilation function;

[0020] When encountering an emergency situation, the air pressure in the ventilation shaft increases and rushes out to the ventilation shaft mouth. At this time, the air pressure lifts the cover body. During the lifting process, when the cover body tilts due to uneven pressure, the inclined side wall will contact the correction mechanism, and the upper end of the correction mechanism will contact the outer ring surface of the cover body. The mutual forces will correct the cover body to ensure smooth lifting of the cover body.

[0021] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0022] The present invention provides a first extension tube, a second extension tube, a correction mechanism and an oil seal groove. First, the first extension tube and the second extension tube are spliced ​​together to erect the cover body, and the cover body is connected to the lifting cylinder. The lifting cylinder is responsible for lifting the cover body during daily use. When a shock wave occurs, the lifting of the cover body can be limited to a certain extent to reduce the deviation. The correction mechanism can limit and correct the cover body in real time when the cover body contacts the shock wave, ensuring that the cover body and the inner through pipe can be lifted stably and positively, reducing the situation of tilting and equipment damage. The correction mechanism can ensure the sealing of the ventilation shaft while ensuring the correction function, and cooperate with the oil seal groove set at the top of the first extension tube and the sealing part set at the end of the second extension tube to achieve double sealing and ensure sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the overall structure of an intelligent opening, closing and resetting linkage device for a ventilator explosion-proof cover provided by the present invention;

[0024] Figure 2 It is a structural schematic diagram of the first extension tube and the correction mechanism in the present invention;

[0025] Figure 3 It is a schematic cross-sectional structure diagram of the first extension tube, the second extension tube and the cover body in the present invention;

[0026] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 5 It is a schematic diagram of the cross-sectional structure of the oil seal groove and the expansion groove in the present invention;

[0028] Figure 6 It is a structural schematic diagram of the sealing mechanism in the present invention;

[0029] Figure 7 It is a schematic structural diagram of the sealing portion and the positioning groove in the present invention.

[0030] Explanation of the symbols in the schematic diagram:

[0031] 1. Bottom ring; 2. First extension tube; 3. Cover body; 4. Bracket; 5. Fixed ring; 6. Cylinder pin; 7. Lifting cylinder; 8. Fixed groove; 9. Correction rod; 10. Mounting hole; 11. Oil seal groove; 12. Expansion groove; 13. Sealing part; 14. Positioning groove; 15. Rubber ring; 16. Extension part; 17. Internal through pipe; 18. Trigger rod; 19. Rotating column; 20. Rebound spring; 21. Fixed pin; 22. Correction block; 23. Mounting cavity; 24. Oil seal strip; 25. Positioning block; 26. Threaded connection hole; 27. Bottom ring; 28. Second extension tube; 29. ​​Limit column; 30. Connecting ring. DETAILED DESCRIPTION

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

[0033] See also Figures 1 to 7 In one embodiment of the present application, a ventilator explosion-proof cover intelligent opening, closing and resetting linkage device includes a bottom ring 1 and a fixed ring 5 coaxially arranged on the outside of the bottom ring 1, and four brackets 4 are arranged in a circumferential array on the upper end surface of the fixed ring 5. The top ends of the four brackets 4 are all equipped with cross beams, and the end surfaces of the four cross beams close to each other are connected to lifting cylinders 7;

[0034] A cover body 3 is connected between the ends of the four lifting cylinders 7;

[0035] The upper end surface of the bottom ring 1 is coaxially connected with the second extension tube 28, and the upper end of the second extension tube 28 is also spliced ​​with the first extension tube 2. The annular circumferential array of the first extension tube 2 is provided with four correction mechanisms. The lower end surface of the cover body 3 is coaxially connected with the inner through tube 17, and the cover body 3 is inserted into the first extension tube 2 through the inner through tube 17. The top ends of the four correction mechanisms are connected to the outer annular surface of the cover body 3.

[0036] A single correction mechanism includes a mounting hole 10 opened on the annular surface of the first extension tube 2, a rotating column 19 installed inside the mounting hole 10, and a correction rod 9 rotatably connected to the outside of the rotating column 19. One end of the correction rod 9 located inside the first extension tube 2 is attached to the outer annular surface of the inner tube 17, and the other end of the correction rod 9 extends to the outside of the mounting hole 10 and is connected to a correction block 22. An auxiliary fixing mechanism is provided on the side of the correction block 22 close to the cover body 3. A fixing groove 8 is also provided at a position on the outer annular surface of the cover body 3 corresponding to the auxiliary fixing mechanism, and the auxiliary fixing mechanism is inserted into the fixing groove 8.

[0037] Furthermore, the auxiliary fixing mechanism includes an installation cavity 23 opened inside the correction block 22, a rebound spring 20 with one end installed on the inner wall of the installation cavity 23, and a fixing pin 21 connected to the other end of the rebound spring 20. The fixing pin 21 is slidably installed in the installation cavity 23, and the fixing pin 21 extends away from the other end of the rebound spring 20 to the outside of the installation cavity 23 and is plugged into the fixing groove 8.

[0038] Furthermore, the shape of the fixing pin 21 is trapezoidal, and the other end of the rebound spring 20 is connected to the long side of the fixing pin 21 , the lower end of the short side of the fixing pin 21 is provided with an arc chamfer, and the number of the rebound springs 20 is several.

[0039] This embodiment is implemented as follows: by setting a first extension tube 2, a second extension tube 28, a correction mechanism and an oil seal groove 11, firstly, the first extension tube 2 and the second extension tube 28 are spliced ​​together to erect the cover body 3, and the cover body 3 is connected to the lifting cylinder 7. The lifting cylinder 7 is responsible for lifting the cover body 3 during daily use. When a shock wave occurs, the lifting cylinder 7 can impose certain restrictions on the rise of the cover body 3 to reduce the deviation, and the correction mechanism can limit and correct the cover body 3 in real time when the cover body 3 contacts the shock wave, to ensure that the cover body 3 and the inner through pipe 17 can be lifted stably and positively, reduce the situation of tilting and rushing out, and reduce the damage to the equipment. In addition, the correction mechanism can ensure the sealing of the ventilation shaft while ensuring the correction function, and cooperate with the oil seal groove 11 set at the top of the first extension tube 2 and the sealing part 13 set at the end of the second extension tube 28 to achieve double sealing and ensure sealing performance.

[0040] In fact, when encountering an emergency situation, the shock wave impacts upward and contacts the cover body 3, lifting the cover body 3. During the lifting process, when the cover body 3 is tilted, the outer annular surface of the inner through tube 17 will contact one end of the correction rod 9. At this time, the correction rod 9 will rotate along the rotating column 19, and the other end of the correction rod 9 will move in the opposite direction, thereby causing the end of the correction rod 9 on the outside of the mounting hole 10 to contact the outer annular surface of the cover body 3 for correction. At the same time, the four correction mechanisms work together to ensure that the cover body 3 always maintains stable and positive movement during the lifting process, greatly reducing the deviation, and performing real-time limit and correction on the cover body 3. The auxiliary fixing mechanism will automatically detach from the fixing groove 8 during the lifting process of the cover body 3, release the fixation of the cover body 3, and achieve a linkage effect. The auxiliary fixing mechanism can perform auxiliary positioning during daily use. During the auxiliary fixing process, the rebound spring 20 will push the fixing pin 21 into the fixing groove 8. At the same time, since the shape of the fixing pin 21 is trapezoidal, and the other end of the rebound spring 20 is connected to the long side of the fixing pin 21, the lower end of the short side of the fixing pin 21 is provided with an arc chamfer, which ensures that during the lifting process of the cover body 3, the arc chamfer at the lower end of the short side of the fixing pin 21 can contact the fixing groove 8, thereby retracting the rebound spring 20 and achieving stable shedding.

[0041] See also Figure 3 and Figure 4 As a preferred embodiment of the present application, four trigger blocks are arranged on the outer surface of the inner tube 17 at the position corresponding to the correction rod 9. The end of the correction rod 9 inside the first extension tube 2 can be attached to the outside of the trigger rod 18. The side of the trigger rod 18 away from the first extension tube 2 is a slope structure, and the slope structure of the trigger rod 18 is inclined from bottom to top toward the direction close to the extension tube, and the upper and lower ends of the trigger rod 18 are rounded structures.

[0042] This embodiment is implemented as follows: in order to ensure that the cover body 3 can stably trigger the correction mechanism when it is lifted by the shock wave, the trigger block can contact the correction rod 9 in advance, and the inclined surface structure of the trigger rod 18 is inclined from bottom to top toward the direction close to the extension tube. At the same time, the upper and lower ends of the trigger rod 18 are rounded structures, which can ensure that the correction rod 9 is smoother and more steadily lifted when it contacts the trigger rod 18.

[0043] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6As a preferred embodiment of the present application, a bottom ring 27 is provided at the inner end of the first extension tube 2, and the end of the inner tube 17 extends to the lower end surface of the bottom ring 27, and an extension portion 16 is provided at one end of the inner tube 17 located at the lower end surface of the bottom ring 27. A sealing mechanism is connected to the lower end surface of the first extension tube 2, and the sealing mechanism is connected to the outer annular surface of the extension portion 16. A sealing portion 13 is formed on the upper end surface of the second extension tube 28, and the sealing mechanism is inserted into the sealing portion 13.

[0044] Furthermore, the sealing mechanism includes a connecting ring 30, a rubber ring 15 which is sleeved on the outer ring surface of the connecting ring 30 and can be turned over, and a threaded connecting hole 26 which is opened through the connecting ring 30 and the extension part 16. The connecting ring 30 is sleeved on the outer ring surface of the extension part 16 and is connected to the threaded connecting hole 26 through an external bolt. The rubber ring 15 is mounted in the sealing part 13. The shape of the sealing part 13 is an annular inclined surface which gradually inclines from the outer ring to the inner ring. The shape of the rubber ring 15 is adapted to the shape of the sealing part 13, and the rubber ring 15 can be turned over by adhering to the outer ring surface of the connecting ring 30.

[0045] Furthermore, a plurality of positioning grooves 14 are evenly distributed on the annular inclined surface of the sealing portion 13, and a plurality of positioning blocks 25 are correspondingly arranged on the inclined surface of the rubber ring 15 close to the sealing portion 13. The positioning blocks 25 are spliced ​​in the positioning groove 14, and the inner sides of the positioning groove 14 are inclined surfaces inclined from top to bottom.

[0046] Furthermore, four oil seal grooves 11 are evenly distributed on the upper end surface of the first extension tube 2, and the four oil seal grooves 11 are located in the gaps between the four mounting holes 10. The lower end surface of the cover body 3 is connected to an oil seal strip 24 at the position corresponding to the oil seal groove 11, and the oil seal strip 24 is inserted into the oil seal groove 11. An expansion groove 12 is also provided at the bottom of a single oil seal groove 11.

[0047] Furthermore, the upper end surfaces of the four beams are all provided with cylinder pins 6, and the cylinder pins 6 can be connected to the lifting cylinder 7. The side of the beam is also connected to one end of the limiting column 29, and the other end of the limiting column 29 can contact the upper end surface of the cover body 3.

[0048] In actual application, in order to ensure that the first extension tube 2 does not lose its sealing due to the mounting hole 10, a bottom ring 27 is set on the inner side of the end of the first extension tube 2. At the same time, the height of the bottom ring 27 can be the same as that of the first extension tube 2. If the height of the bottom ring 27 is the same as that of the first extension tube 2, it can ensure that the first extension tube 2 is fully sealed during the lifting process of the inner tube 17, thereby improving the sealing effect. The sealing mechanism is a rubber ring 15 set between the end of the inner tube 17 and the end of the first extension tube 2. The rubber ring 15 is connected to the extension part 16 at the end of the first extension tube 2 through a connecting ring 30, and is connected to the inner tube 17 through a connecting ring 30. The threaded connection hole 26 is used for connection with external bolts, which is convenient for installation. In actual use, the rubber ring 15 can ensure that the connection between the second extension tube 28 and the first extension tube 2 remains sealed, and a plurality of positioning grooves 14 are arranged on the annular inclined surface of the sealing part 13, and a plurality of positioning blocks 25 are arranged corresponding to the inclined surface of the rubber ring 15 close to the sealing part 13. This is to facilitate positioning when the first extension tube 2 and the second extension tube 28 are connected, and the two sides of the positioning groove 14 are inclined surfaces to facilitate the positioning block 25 to fall into the positioning groove 14, which is convenient for installation and has higher installation efficiency than straight up and down holes and pins.

[0049] The four oil seal grooves 11 evenly distributed on the upper end surface of the first extension tube 2 can be used in conjunction with the oil seal strip 24 on the lower end surface of the cover body 3 to perform oil sealing on the lower end surface of the cover body 3, further improving the sealing effect. The four oil seal grooves 11 are located in the gaps between the four mounting holes 10, which can greatly reduce the impact of the mounting holes 10. The area where the oil seal grooves 11 are not set is sealed by fitting the lower end surface of the cover body 3 with the upper end surface of the first extension tube 2. The expansion groove 12 set inside the oil seal groove 11 is used to expand the capacity of the oil seal groove 11. After the oil seal strip 24 is separated from the oil seal groove 11, the oil level can be lowered further to reduce pollution.

[0050] See also Figures 1 to 7 , a method for an intelligent opening and closing and resetting linkage device for a ventilator explosion-proof cover of the present invention comprises the following steps:

[0051] When in use, firstly, the bottom ring 1 and the fixing ring 5 are arranged at the wellhead of the ventilation shaft, the bottom ring 1 is connected to the wellhead of the ventilation shaft, the first extension tube 2, the second extension tube 28 and the cover body 3 are sequentially installed, and the lifting cylinder 7 is connected to the cover body 3 to seal the wellhead of the ventilation shaft;

[0052] Subsequently, during actual use, during normal ventilation, the cover body 3 is lifted by the lifting cylinder 7, so that the cover body 3 is in contact and connected with the first extension tube 2, thereby realizing the pressure relief and ventilation function;

[0053] When encountering an emergency situation, the air pressure in the ventilation shaft increases and rushes out to the ventilation shaft mouth. At this time, the air pressure lifts the cover body 3. During the lifting process, when the cover body 3 tilts due to uneven pressure, the inclined side wall will contact the correction mechanism, and the upper end of the correction mechanism will contact the outer annular surface of the cover body 3. The mutual forces will correct the cover body 3 to ensure that the cover body 3 is lifted smoothly.

[0054] In summary, the present invention sets a first extension tube 2, a second extension tube 28, a correction mechanism and an oil seal groove 11. First, the first extension tube 2 and the second extension tube 28 cooperate with each other to splice and erect the cover body 3. The cover body 3 is connected to the lifting cylinder 7. The lifting cylinder 7 is responsible for lifting the cover body 3 during daily use. When a shock wave occurs, the lifting of the cover body 3 can be limited to a certain extent to reduce the deviation. The correction mechanism can limit and correct the cover body 3 in real time when the cover body 3 contacts the shock wave, to ensure that the cover body 3 and the inner through pipe 17 can be lifted stably and positively, to reduce the situation of tilting and rushing out, and to reduce the damage to the equipment. The correction mechanism can ensure the sealing of the ventilation shaft while ensuring the correction function, and cooperate with the oil seal groove 11 set at the top of the first extension tube 2 and the sealing part 13 set at the end of the second extension tube 28 to achieve double sealing and ensure sealing performance.

[0055] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

[0056] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An intelligent opening, closing and resetting linkage device for an explosion-proof cover of a ventilator, comprising a bottom ring (1) and a fixing ring (5) coaxially arranged outside the bottom ring (1), wherein four brackets (4) are arranged in a circular array on the upper end surface of the fixing ring (5), and cross beams are installed at the top ends of the four brackets (4), and lifting cylinders (7) are connected to the end surfaces of the four cross beams close to each other, characterized in that: A cover body (3) is connected between the ends of the four lifting cylinders (7); The upper end surface of the bottom ring (1) is coaxially connected to a second extension tube (28), the upper end of the second extension tube (28) is also spliced ​​with the first extension tube (2), the annular circumferential array of the first extension tube (2) is provided with four correction mechanisms, the lower end surface of the cover body (3) is coaxially connected to an inner through tube (17), and the cover body (3) is inserted into the first extension tube (2) through the inner through tube (17), and the top ends of the four correction mechanisms are connected to the outer annular surface of the cover body (3); A single correction mechanism comprises a mounting hole (10) formed on the annular surface of the first extension tube (2), a rotating column (19) mounted inside the mounting hole (10), and a correction rod (9) rotatably connected to the outside of the rotating column (19); one end of the correction rod (9) located inside the first extension tube (2) is attached to the outer annular surface of the inner tube (17); the other end of the correction rod (9) extends to the outside of the mounting hole (10) and is connected to a correction block (22); an auxiliary fixing mechanism is provided on one side of the correction block (22) close to the cover body (3); and a fixing groove (8) is also provided on the outer annular surface of the cover body (3) at a position corresponding to the auxiliary fixing mechanism. The auxiliary fixing mechanism comprises a mounting cavity (23) opened inside the correction block (22), a rebound spring (20) with one end mounted on the inner wall of the mounting cavity (23), and a fixing pin (21) connected to the other end of the rebound spring (20), wherein the fixing pin (21) is slidably mounted in the mounting cavity (23), and the fixing pin (21) extends away from the other end of the rebound spring (20) to the outside of the mounting cavity (23) and is plugged into the fixing groove (8); Four trigger rods (18) are arranged on the outer surface of the inner through tube (17) at positions corresponding to the correction rods (9); one end of the correction rod (9) located inside the first extension tube (2) is in contact with the outside of the trigger rod (18); a side of the trigger rod (18) away from the first extension tube (2) is an inclined surface structure, and the inclined surface structure of the trigger rod (18) is inclined from bottom to top in a direction close to the extension tube; and upper and lower ends of the trigger rod (18) are rounded structures.

2. According to claim 1, a ventilator explosion-proof cover intelligent opening, closing and resetting linkage device is characterized in that: The fixing pin (21) is in the shape of a trapezoid, and the other end of the rebound spring (20) is connected to the long side of the fixing pin (21), and the lower end of the short side of the fixing pin (21) is provided with an arc chamfer, and the number of the rebound springs (20) is several.

3. The intelligent opening, closing and resetting linkage device for the explosion-proof cover of a ventilator according to claim 2 is characterized in that: A bottom ring (27) is provided at the inner end of the first extension tube (2), and the end of the inner tube (17) extends to the lower end surface of the bottom ring (27); an extension portion (16) is provided at one end of the inner tube (17) located at the lower end surface of the bottom ring (27); a sealing mechanism is connected to the lower end surface of the first extension tube (2), and the sealing mechanism is connected to the outer annular surface of the extension portion (16); a sealing portion (13) is formed on the upper end surface of the second extension tube (28), and the sealing mechanism is inserted into the interior of the sealing portion (13).

4. The intelligent opening, closing and resetting linkage device for the explosion-proof cover of a ventilator according to claim 3 is characterized in that: The sealing mechanism comprises a connecting ring (30), a rubber ring (15) sleeved on the outer ring surface of the connecting ring (30) and capable of being turned over, and a threaded connection hole (26) extending through the connecting ring (30) and the extension portion (16); the connecting ring (30) is sleeved on the outer ring surface of the extension portion (16) and is connected to the threaded connection hole (26) by means of an external bolt; the rubber ring (15) is mounted in the sealing portion (13); the sealing portion (13) is in the shape of an annular inclined surface which gradually inclines from the outer ring to the inner ring; the shape of the rubber ring (15) matches the shape of the sealing portion (13), and the rubber ring (15) can be turned over by adhering to the outer ring surface of the connecting ring (30).

5. The intelligent opening, closing and resetting linkage device for the explosion-proof cover of a ventilator according to claim 4 is characterized in that: A plurality of positioning grooves (14) are evenly distributed on the annular inclined surface of the sealing portion (13); a plurality of positioning blocks (25) are correspondingly arranged on the inclined surface of the rubber ring (15) close to the sealing portion (13); the positioning blocks (25) are spliced ​​in the positioning grooves (14); and the inner sides of the positioning grooves (14) are inclined surfaces inclined from top to bottom.

6. The intelligent opening, closing and resetting linkage device for the explosion-proof cover of a ventilator according to claim 5 is characterized in that: The upper end surface of the first extension tube (2) is evenly distributed with four oil seal grooves (11), and the four oil seal grooves (11) are located in the spaced-apart gaps between the four mounting holes (10). The lower end surface of the cover body (3) is connected to an oil seal strip (24) at a position corresponding to the oil seal groove (11), and the oil seal strip (24) is inserted into the oil seal groove (11). A capacity expansion groove (12) is also provided at the bottom of each oil seal groove (11).

7. The intelligent opening, closing and resetting linkage device for the explosion-proof cover of a ventilator according to claim 6 is characterized in that: The upper end surfaces of the four cross beams are all provided with cylinder pins (6), and the cylinder pins (6) are connected to the lifting cylinders (7). The side surfaces of the cross beams are also connected to one end of a limiting column (29), and the other end of the limiting column (29) contacts the upper end surface of the cover body (3).

8. A method for applying the intelligent opening, closing and resetting linkage device for explosion-proof cover of a ventilator according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: When in use, the bottom ring (1) and the fixing ring (5) are first arranged at the wellhead of the ventilation shaft, the bottom ring (1) is connected to the wellhead of the ventilation shaft, the second extension tube (28), the first extension tube (2) and the cover body (3) are sequentially installed, and the lifting cylinder (7) is connected to the cover body (3) to seal the wellhead of the ventilation shaft; Subsequently, during actual use, during normal ventilation, the cover body (3) is lifted by the lifting cylinder (7), thereby releasing the connection between the cover body (3) and the first extension tube (2), thereby achieving a pressure relief ventilation function; When an emergency occurs, the air pressure in the ventilation shaft increases and gushes out toward the ventilation shaft opening. At this time, the air pressure lifts up the cover body (3). During the lifting process, when the cover body (3) tilts due to uneven pressure, the tilted side wall contacts the correction mechanism, and the upper end of the correction mechanism contacts the outer annular surface of the cover body (3), correcting the cover body (3) and ensuring that the cover body (3) is lifted smoothly.

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