CN117266909A - Underground exhaust system - Google Patents

Abstract

The invention discloses an underground exhaust system, which comprises two groups of air door bodies, wherein a closed cavity is formed between the two groups of air door bodies, each air door body comprises a switch door, a pressure relief assembly is arranged on the switch door, and the pressure relief assembly is used for balancing the pressure difference between the inside and the outside of the cavity before the switch door is opened; according to the pressure relief assembly, before the switch door is opened, the pressure relief assembly is opened first, so that the inside and the outside of the cavity are communicated with each other, the pressure difference between the inside and the outside of the cavity is balanced, and after the air pressure is balanced, the switch door is opened, so that the problem that the switch door is difficult to open due to air pressure unbalance is solved.

Description

Underground exhaust system

Technical Field

The invention relates to the technical field of underground ventilation, in particular to an underground exhaust system.

Background

The mining method has the advantages that 70% of metal deposits in China are mined by underground workers, the mining danger is high, mine ventilation work is well done, an efficient underground intelligent ventilation structure is built, underground airflow is planned and controlled according to requirements, and the method is an important point for effectively preventing various ventilation related accidents; the air door is an important facility of the mine ventilation system, firstly, a large amount of toxic and harmful gas can be prevented from invading and spreading to other working places with good ventilation, the toxic and harmful gas is limited in a local area, and then the toxic and harmful gas is led into a return air lane of the ventilation system, so that casualties caused by personnel poisoning can be effectively prevented; and secondly, the wind flow regulating function can be realized by opening or closing the air door.

The patent with publication number CN110985093B and publication date 2021, 02 month and 19 days discloses a mining underground air door locking device, which relates to the field of mining ventilation and comprises a waterproof box, a top box, a bottom plate and at least two door frames, and is characterized in that: the top of the waterproof box is opened, the opening end of the waterproof box is sealed through a bottom plate, the bottom plate is level with the ground of a roadway, the door frames are arranged on the side wall of the roadway, the tops of the two door frames are fixedly connected through a top plate, and the top box is fixed on the top plate; the bottom of the door frame is fixed in the water receiving inner cover of the water receiving cover, and the door frame is respectively provided with a door through groove, a door sliding groove and a guide hole, and the guide hole communicates the inside of the top box with the inside of the waterproof box; the door plate is slidably arranged in the door chute, and the outer wall of the door plate is sealed with the inner wall of the door chute and can be slidably assembled; the top of the door plate is assembled and fixed with a chain block, the chain block is assembled and fixed with one end of a first chain, and the first chain is assembled and fixed with the other door plate through the other chain block after bypassing the two first chain wheels respectively; the bottom of the door plate is provided with a connecting ring, the connecting ring is fixedly connected with one end of a second chain, and the other end of the second chain passes through the connecting sleeve and then passes through the other connecting sleeve and the telescopic sleeve after passing through two sixth chain wheels respectively, and then is fixedly assembled with the connecting ring of the other door plate.

In the prior art, two groups of air doors are simultaneously installed in a mine, a sealed cavity is formed between the two groups of air doors, and the air doors are difficult to open under the action of pressure difference due to the difference of pressure difference between the inside and the outside of the cavity, so that time and labor are wasted.

Disclosure of Invention

The object of the present invention is to provide a downhole exhaust system, which solves the above-mentioned drawbacks of the prior art.

In order to achieve the above object, the present invention provides the following technical solutions: the underground exhaust system comprises two groups of air door bodies, a closed cavity is formed between the two groups of air door bodies, each air door body comprises a switch door, a pressure relief assembly is arranged on each switch door and used for balancing the pressure difference between the inside and the outside of the cavity before the switch door is opened.

Further, the pressure release assembly comprises a pressure release hole and a control piece, the pressure release hole penetrates through the switch door and is communicated with the cavity, and the control piece is used for controlling connectivity of the pressure release hole and the cavity.

Further, the control piece comprises an electric push rod and a baffle, the baffle is slidably mounted inside the switch door, the electric push rod is fixedly mounted in the switch door, and the output shaft is fixedly connected with the baffle.

Further, a limiting groove is formed in the switch door, the limiting groove and the pressure relief hole are vertically arranged and are mutually communicated, and the partition plate is arranged in the limiting groove and forms sliding guide fit with the limiting groove.

Further, the length and the width of the partition plate are both larger than the aperture of the pressure relief hole.

Further, a sealing ring is arranged at the communication part of the pressure relief hole and the limiting groove.

Further, two groups of switch doors are arranged on each group of air door body, a handle of an L-shaped structure is fixedly arranged on each group of switch doors, the handle is arranged at one side opening part of the pressure release hole, which is away from the cavity, the interior of the handle is hollow so as to form a diversion trench, and the diversion trench is communicated with the pressure release hole.

Further, push plates are arranged on opposite side surfaces of the two groups of switch doors, and the push plates are connected with the switch doors in a sliding manner.

Further, the baffle drives the two groups of pushing plates to be close to or far away from each other when sliding in the limiting groove.

Further, the spring is also installed in the switch door, and the two ends of the spring are respectively connected with the inner wall of the switch door and the push plate.

The invention has the beneficial effects that: in the technical scheme, before the switch door is opened, the pressure release assembly is opened, so that the inside and the outside of the chamber are communicated with each other, the pressure difference between the inside and the outside of the chamber is balanced, and after the air pressure is balanced, the switch door is opened, so that the problem that the switch door is difficult to open due to air pressure unbalance is solved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic diagram of a front structure of a damper according to an embodiment of the present invention;

FIG. 2 is a schematic side view of a damper according to an embodiment of the present invention;

FIG. 3 is a side partial cross-sectional view of a damper provided in an embodiment of the present invention;

FIG. 4 is a front partial cross-sectional view of a damper provided in an embodiment of the present invention;

fig. 5 is a schematic diagram of an iris mechanism according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a front structure of a damper according to another embodiment of the present invention;

FIG. 7 is a schematic side view of a damper according to another embodiment of the present invention;

FIG. 8 is a schematic view of a part of a switch door and a plugging plate according to another embodiment of the present invention;

FIG. 9 is a cross-sectional view of the interior of a closure plate according to another embodiment of the present invention;

FIG. 10 is an enlarged view of FIG. 6 according to another embodiment of the present invention;

FIG. 11 is an enlarged view of portion B of FIG. 7 according to another embodiment of the present invention;

FIG. 12 is an enlarged view of FIG. 9 at C according to another embodiment of the present invention;

fig. 13 is an enlarged view of D in fig. 9 according to another embodiment of the present invention.

Reference numerals illustrate:

1. a damper body; 11. opening and closing a door; 111. a pressure relief hole; 12. an arc-shaped groove; 13. a pressure relief assembly; 131. a limit groove; 132. a partition plate; 133. an electric push rod; 14. a handle; 141. a diversion trench; 142. an iris mechanism; 1421. a rotating disc; 1422. a fixed plate; 1423. a splice plate; 1424. a guide post; 15. a push plate; 2. a track; 3. a plugging mechanism; 31. a plugging plate; 32. a connection assembly; 321. a first link; 322. a first gear; 323. a first rack; 33. a limit groove; 34. a seal assembly; 341. a first sealing plate; 342. a second sealing plate; 343. a sleeve; 344. a second link; 345. a second rack; 346. a second gear; 347. a third rack; 35. a receiving groove; 4. a driving mechanism; 41. a bi-directional motor; 42. a unidirectional transmission mechanism; 43. a reciprocating mechanism; 44. a driving rack; 45. a driven gear; 5. and (5) a base.

Detailed Description

In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as directions or positional relationships based on the directions or positional relationships shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the invention. In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 5, the underground exhaust system provided by the embodiment of the invention comprises two groups of air door bodies 1, wherein a closed cavity is formed between the two groups of air door bodies 1, the air door bodies 1 comprise a switch door 11, a pressure release assembly 13 is arranged on the switch door 11, and the pressure release assembly 13 is used for balancing the pressure difference between the inside and the outside of the cavity before the switch door 11 is opened.

Specifically, two groups of air door bodies 1 are all vertically arranged in the mine, the air door bodies 1 are closely attached to the inner wall of the mine and are in sealing connection, a closed cavity is formed between the two groups of air door bodies 1, because air pressure difference occurs between the front and rear of the two groups of air door bodies 1 at individual sections, that is, the phenomenon of clamping stagnation occurs when the air door bodies are opened due to unbalanced air pressure inside and outside the cavity, in the embodiment, the pressure release assembly 13 is arranged on the switch door 11, the pressure release assembly 13 is used for balancing the pressure difference inside and outside the cavity before the switch door 11 is opened, the pressure release assembly 13 can be a pressure release valve and the like, before the air door bodies 1 need to be opened, the pressure release assembly 13 is opened, the inside and outside the cavity are mutually communicated, so that the pressure difference inside and outside the cavity is balanced, after the air pressure is balanced, the switch door 11 is opened through a motor, a rotary driving device such as a rotary cylinder, and the like, so that the problem that the switch door 11 is difficult to be opened due to the air pressure unbalance is avoided.

Further, the pressure release assembly 13 includes a pressure release hole 111 penetrating through the switch door 11 and communicating with the chamber, and a control member for controlling connectivity of the pressure release hole 111 and the chamber.

Specifically, the pressure release hole 111 is opened on the switch, and the switch door 11 is equipped with two sets of, and pressure release subassembly 13 is equipped with four sets of, is located respectively on two pairs of switch doors 11 on two sets of air door bodies 1, and the control is installed inside the switch door 11, adjusts the connectivity of cavity and pressure release hole 111 through the control.

In an alternative embodiment, preferably, the control member includes an electric push rod 133 and a partition 132, the partition 132 is slidably mounted inside the switch door 11, the electric push rod 133 is fixedly mounted inside the switch door 11, and the output shaft is fixedly connected with the partition 132.

Specifically, the sliding groove 131 is formed in the switch door 11, the sliding groove 131 and the pressure release hole 111 are vertically arranged and are mutually communicated, the partition 132 is arranged in the sliding groove 131 and forms sliding guide fit with the sliding groove 131, the electric push rod 133 drives the partition 132 to slide in the sliding groove 131, in the actual use process, when two groups of switch doors 11 are in a closed state, the partition 132 is located in the hole, the length and the width of the partition 132 are both greater than the aperture of the pressure release hole 111, so that the pressure release hole 111 can be plugged by extending the partition 132, a sealing ring is arranged at the communicating position of the pressure release hole 111 and the sliding groove 131, the tightness between the pressure release hole 111 and the plugging plate can be enhanced, when the switch door 11 needs to be opened, the electric push rod 133 drives the partition 132 to slide in the sliding groove 131, so that the partition 132 is separated from the pressure release hole 111, at the moment, the cavity is communicated with the external environment, and the air pressure is balanced, so that the problem that the switch door 11 is difficult to open due to air pressure unbalance is avoided.

Further, two sets of switch doors 11 are arranged on each set of air door body 1, a handle 14 of an L-shaped structure is fixedly arranged on each set of switch doors 11, the handle 14 is arranged at one side opening of the pressure relief hole 111, which is away from the cavity, the interior of the handle 14 is hollow so as to form a diversion trench 141, and the diversion trench 141 is communicated with the pressure relief hole 111.

Specifically, the handle 14 is in an L-shaped structure, one end of the flow guiding groove 141 is communicated with the pressure releasing hole 111, the opening of the other end faces the ground, when the switch door 11 needs to be opened, the electric push rod 133 drives the partition 132 to slide in the sliding groove 131, the partition 132 is separated from the pressure releasing hole 111, the pressure releasing hole 111 is opened, air in the cavity can flow outwards at the moment, the outwards flowing air enters the flow guiding groove 141 from the pressure releasing hole 111 and is led out of the cavity through the flow guiding groove 141, and the other end of the flow guiding groove 141 faces the ground, so that exhaust gas can be prevented from being blown to staff.

Further, a push plate 15 is installed on the opposite side of the two sets of switch doors 11, and the push plate 15 is slidably connected to the switch doors 11.

Specifically, in order to realize the tightness of the two groups of switch doors 11 after closing, push plates 15 are installed on opposite sides of the two groups of switch doors 11, when the two groups of switch doors 11 are closed, the push plates 15 extend out from the inside of the switch doors 11, and the two groups of push plates 15 are mutually extruded, so that the tightness between the two groups of switch doors 11 is improved.

In another embodiment of the present invention, further, the partition 132 drives the two sets of push plates 15 toward or away from each other as they slide in the chute 131.

Specifically, the push plate 15 is located at one side of the partition 132, a guiding inclined plane is installed on one side surface opposite to the partition 132 and the push plate 15, the partition 132 and the push plate 15 form wedge-shaped fit through the guiding inclined plane, as shown in fig. 4, and a spring is further installed in the switch door 11, two ends of the spring are respectively connected with the inner wall of the switch door 11 and the push plate 15, in the actual use process, when the partition 132 slides in the chute 131 and stretches into the hole, that is, when the switch door 11 is in a closed state, the partition 132 pushes the push plate 15 to slide in the switch door 11 through guiding, two groups of push plates 15 are close to each other and squeeze, at this time, the spring stretches, sealing performance between the two groups of switch doors 11 is improved through mutual squeezing between the two groups of push plates 15, when the partition 132 is separated from the hole, that is before the switch door 11 is opened, the guiding inclined plane on the partition 132 is separated from the push plate 15 is reset and stretches into the switch door 11 under the action of the spring, and at this time, the two groups of push plates 15 are far away from each other.

In another embodiment of the present invention, the handle 14 is rotatably connected to the opening and closing door 11, and the iris mechanism 142 is installed inside the opening and closing door 11.

Specifically, the iris mechanism 142 is installed at the connection position of the diversion trench 141 and the pressure relief hole 111, two ends of the iris mechanism 142 are respectively connected with the trench wall of the diversion trench 141 and the wall of the pressure relief hole 111, the iris mechanism 142 is not described in detail in the prior art, the handle 14 is rotationally connected to the outer wall of the switch door 11 through a hinge shaft, the opening and closing of a channel in the iris mechanism 142 are controlled through the rotation of the handle 14, in the actual use process, the handle 14 is initially in an upward vertical state, namely the opening of the diversion trench 141 in the handle 14 is upward, the iris mechanism 142 is in a closed state at the moment, the diversion trench 141 is not communicated with the pressure relief hole 111, when the throttle body 1 needs to be opened, a worker manually rotates the handle 14, the handle 14 is rotated downwards by 180 degrees, the rotation of the handle 14 drives the iris mechanism 142 to rotate, the channel in the iris mechanism 142 is opened, the pressure relief hole 111 is communicated with the diversion trench 141 through the channel, at the moment, the outwards flowing air enters the diversion trench 141 from the pressure relief hole 141 and is guided out of the cavity through the diversion trench 141, the rotation of the handle 14 is set through the rotation of the handle 14, and the handle 14 is used for prompting the worker that the throttle body 1 is in a state to be in a closed state or in which the state when the throttle body 1 is required to be opened;

it should be noted that, the iris mechanism 142 includes a rotating disc 1421 and a fixed disc 1422, the rotating disc 1421 is located in the guiding groove 141 and is fixedly connected with the groove wall of the guiding groove 141, the fixed disc 1422 is located in the pressure release hole 111 and is fixedly connected with the hole wall of the pressure release hole 111, multiple groups of connecting plates 1423 are installed between the rotating disc 1421 and the fixed disc 1422, multiple groups of connecting plates 1423 enclose to form a channel, guide posts 1424 are installed at two ends of each group of connecting plates 1423, the rotating disc 1421 and the fixed disc 1422 are respectively located in two groups of sliding grooves and form sliding guiding coordination with the sliding grooves, the sliding grooves on the rotating disc 1421 are obliquely arranged, the sliding grooves on the fixed disc 1422 are radially arranged along the sliding grooves of the fixed disc, so that the directions of the two groups of sliding grooves are inconsistent, the iris mechanism 142 is of the general structure in the prior art, when the handle 14 is in an upward vertical state initially, that the opening of the guiding groove 141 is upward, the iris mechanism 142 is in a closed state, that the sliding grooves are located at two groups of the two groups of sliding grooves are close to each other, that the sliding grooves are located close to each other, and the sliding grooves are not mutually pressed to each other, namely, the sliding grooves are opened, and the sliding grooves are not closed, and the sliding grooves are opened, and the sliding grooves are not are closed, and are synchronously, and the sliding grooves are opened, and are turned, and the sliding grooves are 2 are moved.

As shown in fig. 6-13, when the bottom of the switch door 11 is penetrated by the rails 2, the invention provides another embodiment, and further comprises a plugging mechanism 3 and a driving mechanism 4, wherein the driving mechanism 4 is used for driving the plugging mechanism 3 to rotate between two groups of rails 2.

Specifically, the air door body 1 still includes the door frame, two sets of switch door 11 are two switch door 11 structures, switch door 11 articulates in the door frame, be used for driving switch door 11 pivoted actuating unit is installed to the bottom of door frame, actuating unit can be motor, revolving cylinder etc. rotary drive mechanism 4 and corresponding transmission structure, the bottom combination of two sets of switch door 11 is provided with rectangular opening, track 2 passes switch door 11 through this rectangular opening, this is prior art, the shutoff mechanism 3 can be for rotating the plate body of installing in rectangular opening below, the plate body is located two sets of orbital below when air door body 1 opens, actuating mechanism 4 also can be motor, revolving cylinder etc. rotary drive mechanism 4, when actuating mechanism 4 is the motor, the motor is installed in the bottom of air door body 1, and the output is connected with the plate body, in-service use, after switch door 11 is driven to close through actuating unit, two sets of switch door 11 bottom combination form rectangular opening, and track 2 is located rectangular opening this moment, drive the plate body to rotate into rectangular opening, seal rectangular opening, the motor is sealed to rectangular opening.

According to the plugging mechanism 3 and the driving mechanism 4 provided by the invention, the driving mechanism 4 drives the plugging mechanism 3 to rotate between the two groups of tracks 2, and the area between the two groups of tracks 2 is plugged through the plugging mechanism 3, so that the influence of the arrangement of the tracks 2 on the air door on the air flow partition in the mine is avoided.

In another embodiment provided by the invention, further, the base 5 is installed at the bottom of the damper body 1, the track 2 is fixedly connected to the base 5, and the driving mechanism 4 is arranged in the base 5.

Specifically, the inside of base 5 is cavity, and track 2 and plate body are all installed on base 5, and actuating mechanism 4 installs in base 5, in the in-service use, can bury base 5 in the ground of mine, make the upper surface of base 5 be in on the same straight line with the ground of mine, and shutoff mechanism 3 can be the plate body, and in the bottom of plate body stretched into base 5 to be connected with actuating mechanism 4, base 5 played the effect of supporting air door body 1 and holding actuating mechanism 4.

In another embodiment of the present invention, further, two groups of damper bodies 1 are installed and located at two ends of the base 5 respectively.

Specifically, the air door bodies 1 are vertically arranged on the base 5, the two groups of air door bodies 1 are respectively located at two ends of the base 5, a sealed cavity is formed between the two groups of air door bodies 1, the two groups of air door bodies 1 are respectively located at two ends of the cavity, and in the actual use process, when one group of air door bodies 1 is opened, the other group of air door bodies 1 are in a locked closed state, that is, only one end of the cavity is allowed to be communicated with the external environment, so that the air flow blocking and stabilizing effect is achieved.

In another embodiment of the present invention, the plugging mechanism 3 further includes a plugging plate 31, and a connection assembly 32 is installed on the plugging plate 31, where the connection assembly 32 is used to drive the plugging plate 31 to be attached to the bottom of the damper body 1.

In an alternative embodiment, preferably, the connecting component 32 includes a first link 321 movably mounted at one end of the plugging plate 31, the first link 321 is in a T-shaped structure, the bottom of the switch door 11 is provided with an arc slot 12, one end of the first link 321 forms a sliding guiding fit with the arc slot 12, and one end of the first link 321 forms a limiting interference fit after sliding to the bottom wall of the arc slot 12.

Specifically, the air door body 1 includes switch door 11 and door frame, arc wall 12 is offered in the bottom of switch door 11, the opening in arc wall 12 is located switch door 11 and is towards one side of cavity, in the in-service use, when needs closed the air door, at first, two sets of switch doors 11 are closed to the motor drive, two sets of switch door 11 bottoms and two sets of track 2 enclose out rectangular opening this moment, two sets of track 2 are located rectangular open's both sides, actuating mechanism 4 drive shutoff plate 31 rotate to vertical state from the horizontality, promptly rotate to rectangular pipe opening in from base 5, in-process that rotates, the one end of first connecting rod 321 gets into arc wall 12 gradually, after the shutoff plate 31 rotates completely to be vertical state, the one end of first connecting rod 321 enters into the tank bottom of arc wall 12 completely, at this moment first connecting rod 321 is spacing in arc wall 12, because switch door 11 is for rotating around the Y axle, promptly around vertical axis rotation, and shutoff plate 31 is around horizontal axis rotation promptly, because shutoff plate 31 and 11's rotation direction is different, consequently, the first throttle 321 need be opened and make first throttle plate 321 break away from the corresponding to the door 1 when the door 1 and the door 1 is in the realization is in the corresponding state of the locking body, and the lock 1 is in order to realize that the throttle body is not to rotate, the lock 1, and the lock 1 is not to realize the lock.

In another embodiment of the present invention, the connecting assembly 32 further includes a first gear 322 and a first rack 323, wherein the first gear 322 is installed at one end of the first link 321 extending into the arc-shaped groove 12 and is engaged with the first rack 323, and the other end of the first link 321 extends into the plugging plate 31 and is rotatably connected to the plugging plate 31.

Specifically, the first gear 322 is a bevel gear, the first rack 323 is a bevel gear groove adapted to the first gear 322, the end of the rotation stroke of the plugging plate 31 is a locking stroke, the locking stroke starts from engagement of the first gear 322 on the first connecting rod 321 with the first rack 323 on the arc groove 12, at this time, the rotation stroke of the first connecting rod 321 forces the first gear 322 to rotate relatively with the first rack 323, so that the first gear 322 rotates, and the rotation of the first gear 322 drives the first connecting rod 321 to rotate while revolving, and it is required to make up that the longitudinal section of the arc groove 12 is also T-shaped first gear 322 limited inside the arc groove 12 because the first connecting rod 321 and the first gear 322 are combined to be T-shaped, and the first gear 322 is blocked by the wall of the arc groove 12, so that the first gear 322 cannot be separated from the arc groove 12.

In another embodiment of the present invention, the driving mechanism 4 is further provided with two groups, which are respectively located at two ends of the base 5.

Specifically, because the two sets of the air door bodies 1 are provided with two sets of the air door bodies 1 corresponding to the two sets of the plugging plates 31, in this embodiment, the driving mechanism 4 is provided with two sets of the plugging plates 31, respectively, and the driving mechanism 4 may be a rotating mechanism with a motor, a rotating cylinder, and the like, and the two sets of the driving mechanism 4 respectively drive the two sets of the plugging plates 31 to rotate, and when one set of the motor works, the other set of the motor is temporarily stopped, and when the motor works, the output shaft of the motor drives the plugging plates 31 to rotate in the base 5, and because the two sets of the motors are not started simultaneously, when one set of the motor works, that is, the plugging plates 31 rotate from a vertical state, and when the corresponding air door body 1 is unlocked, the other set of the corresponding plugging plates 31 is maintained in a vertical state, and when the corresponding air door body 1 is opened later, the corresponding air door body 1 is also in a locked state, thereby preventing the two sets of the air door bodies 1 from being opened simultaneously.

In an alternative embodiment, preferably, the driving mechanism 4 comprises a bidirectional motor 41, a unidirectional transmission mechanism 42, a reciprocating mechanism 43 and a driving rack 44, two output ends of the bidirectional motor 41 are in transmission connection with the reciprocating mechanism 43 through the unidirectional transmission mechanism 42, the reciprocating mechanism 43 is used for driving the driving rack 44 to reciprocate linearly, the plugging plate 31 is rotatably connected to the base 5 through a hinge shaft, a driven gear 45 is mounted at one end of the base 5, and the driven gear 45 is meshed with the driving rack 44.

Specifically, the bidirectional motor 41 is only required to be arranged in one group, two groups of unidirectional transmission mechanisms 42, a reciprocating mechanism 43, a driving rack 44 and a driven gear 45 are respectively arranged, two output ends of the bidirectional motor 41 are respectively corresponding to each other, and are all installed in the base 5, the two groups of unidirectional transmission mechanisms 42 are respectively connected to the two output ends of the bidirectional motor 41, the unidirectional transmission mechanisms 42 are not described in detail in the prior art, such as ratchet and pawl mechanisms and the like, the rotation limiting directions of the two groups of unidirectional transmission mechanisms 42 are opposite, the reciprocating mechanism 43 is a reciprocating screw assembly, the reciprocating screw assembly is not described in detail in the prior art, a reciprocating screw in the reciprocating screw assembly is connected with an output shaft of the bidirectional motor 41 through the unidirectional transmission mechanism 42, the driving rack 44 is connected with a sliding block in the reciprocating screw assembly, and when the reciprocating screw rotates, the reciprocating linear movement of the sliding block drives the driving rack 44 to move synchronously, and in the practical use, the two groups of air door bodies 1 comprise the following two states:

an initial state; the two groups of air door bodies 1 are in a closed state, the two groups of plugging plates 31 are vertically arranged between the two groups of rails 2, a first gear 322 at one end of a first connecting rod 321 stretches into an arc-shaped groove 12 at the bottom of the switch door 11, a bidirectional motor 41 is in a temporary stop state, and the two groups of air door bodies 1 are in a locking state by the two groups of plugging plates 31;

selecting an open state: when a worker or a mine car needs to pass through the air door, the corresponding air door body 1 needs to be opened, in the opening process, the bidirectional motor 41 starts to work and drives the output shaft on the bidirectional motor to rotate, because the forward rotation and the reverse rotation of the output shaft respectively correspond to different blocking plates 31 and the switch door 11, the operator can determine the specific rotation direction of the output shaft according to the air door body 1 needing to be opened, so that the two output ends on the output shaft synchronously rotate in the forward direction, one output end drives the reciprocating screw in the reciprocating mechanism 43 to rotate through the unidirectional transmission mechanism 42, the other output end idles in the other unidirectional transmission mechanism 42 because the rotation limiting direction of the two groups of unidirectional transmission mechanisms 42 is opposite, namely, one group of blocking plates 31 rotate the other group of blocking plates 31 to be maintained in the vertical state, the rotation of the reciprocating screw drives the sliding block and the driving rack 44 on the sliding block, and the driving rack 44 at the moment moves to one side deviating from the bidirectional motor 41, the driven gear 45 is meshed with the movement of the driving rack 44, the driven gear 45 can drive the blocking plates 31 to rotate, the plate 31 is rotated to be in the horizontal state from the vertical state, the blocking plates 31 are separated from the corresponding to the two groups of blocking plates 2 through the corresponding arc-shaped grooves 1, and the blocking plates 1 can be prevented from being opened from the bottom of the corresponding blocking bodies 1;

corresponding to the off state: after one group of air door bodies 1 is opened, a worker or a mine car enters the area between the two groups of air door bodies 1, at the moment, the air door bodies 1 which are just opened need to be closed again, the switch door 11 rotates in advance and is closed, then the bidirectional motor 41 continues to rotate forward, the sliding block on the reciprocating screw rod drives the driving rack 44 to move in a resetting way, the driving rack 44 moves to drive the driven gear 45 to rotate in a resetting way, the driven gear 45 drives the blocking plate 31 to rotate in a horizontal state and rotate between the two groups of tracks 2 in a vertical state, the area between the two groups of tracks 2 is blocked, the first gear 322 at one end of the first connecting rod 321 stretches into the arc-shaped groove 12 again, and the air door bodies 1 are in a locking state again;

finally, the other air door body 1 is opened, so that workers and mine cars can smoothly pass through the air door, at the moment, the output shaft of the two-way motor 41 drives the output shaft to reversely rotate, the steps are repeated, the output shaft of the two-way motor 41 drives the other plugging plate 31 to rotate through the other group of one-way transmission mechanisms 42 and the reciprocating mechanism 43, the locking of the other air door body 1 is released, after the workers and the mine cars pass through the air door body 1, the air door body 1 is closed again, the two-way motor 41 continues to drive the output shaft to reversely rotate, so that the plugging plate 31 is reset to rotate, and the air door body 1 is locked again;

in summary, the control of the two sets of damper bodies 1 can be achieved under the driving of the output shaft of the bi-directional motor 41, and no matter how the output shaft of the bi-directional motor 41 rotates, one set of blocking plates 31 is driven to rotate and unlock the damper bodies 1, the other set of damper bodies 1 is necessarily in a locked state.

In another embodiment of the invention, the section of the track 2 is I-shaped, and a sealing assembly 34 is arranged in the sealing plate 31, and the sealing assembly 34 is used for sealing the openings of the two groups of tracks 2 on the side close to each other.

Specifically, because the section of track 2 is the I shape, so the both sides of track 2 are equipped with the opening of C shape, and the shutoff board 31 is rectangular platy mechanism, be difficult to seal the both sides opening of shutoff board 31, because of the rotation reverse difference of switch door 11 and shutoff board 31, after the air door is closed, switch door 11 just laminating in the one side that two sets of track 2 deviate from each other, and set up the rubber pad in the side that switch door 11 and track 2 laminate each other, realize the sealing connection between switch door 11 and the track 2 through the rubber pad, and in the shutoff board 31 rotation in-process, in order to seal two sets of track 2 and be close to the opening of one side each other, install seal assembly 34 in the inside of shutoff board 31, seal assembly 34 is used for stretching out from shutoff board 31 in the shutoff board 31 rotation in-process, seal assembly 34 is used for shutoff two sets of track 2 are close to the opening of one side each other, shutoff board 31 can be for driving the C shape closing plate unanimous with track 2 opening shape, rotate to vertical state promptly after locking switch door 11 from the horizontal state at shutoff board 31, the closing plate 31's inside stretches out from the opening of shutoff board 31, and stretches into track 2 into the opening in the opening of one side, seal plate 2 is equipped with the linear motion simultaneously, and seal assembly is equipped with two sets of seal rod 34 in the inside that can be stretched out and draw back in the opening of the sealing plate 31 to the sealing plate 31 in the state simultaneously, linear motion simultaneously, when two sets of seal plate 31 need to be stretched out and sealed plate 31, and linear motion is closed in the side.

In an alternative embodiment, the seal assembly 34 preferably includes a seal and a linkage for urging the seal out of the interior of the closure plate 31 during rotation of the closure plate 31.

Specifically, the sealing member includes a first sealing plate 341 and a second sealing plate 341, the interior of the plugging plate 31 is provided with a containing groove 35, the first sealing plate 341 is located in the containing groove 35 and forms sliding guiding fit with the containing groove 35, the first sealing plate 341 is provided with two groups corresponding to two groups of rails 2, the second sealing plate 341 is located in the first sealing plate 341, each group of first sealing plate 341 is provided with two groups of second sealing plates 341, the linkage member includes a sleeve 343 and a second rack 345, one end of the first connecting rod 321 far away from the first gear 322 extends into the containing groove 35, the sleeve 343 is arranged at one end of the first connecting rod 321 extending into the containing groove 35, the sleeve 343 is in threaded connection with the first connecting rod 321, the top of the containing groove 35 is provided with a limit groove 33, the sleeve 343 and the limit groove 33 are all in a multi-prismatic structure, the sleeve 343 and the wall of the limit groove 33 form sliding guiding fit, the bottom of the limit groove 33 is provided with threads, the threads arranged at the bottom of the first connecting rod 321 are meshed with the sleeve 343 and drive the sleeve 343 to slide in the limit groove 33, the bottom of the sleeve 344 is provided with the second rack, the second connecting rod is connected with the second rack 345, the second rack is connected with the second rack 346 is arranged at one end of the second connecting rod 321, the second rack is connected with the second rack 346, the second rack is connected with the second rack 346 is coaxially, the second rack 346 is connected with the second rack 346, and the second rack is connected with the second rack and the second rack, which is a connecting rod 346 is arranged in parallel;

when the plugging plate 31 rotates from the horizontal state to the vertical state, the first gear 322 at one end of the first connecting rod 321 enters the arc-shaped groove 12 and is meshed with the first gear 322, the first connecting rod 321 rotates in the revolution process, the rotation driving sleeve 343 of the first connecting rod 321 slides in the limit groove 33 to one side deviating from the switch door 11 and gradually approaches the first sealing plate 341, under the driving of the second connecting rod 344, the sliding of the sleeve 343 drives the first sealing plate 341 to slide in the containing groove 35 and extend out of the opening at the side surface of the plugging plate 31, the second sealing plate 341 is smaller in height than the width of the opening at the side surface of the track 2, the first sealing plate 341 extends out of the track 2, meanwhile, the movement of the first sealing plate 341 drives the second gear 346 to move synchronously, the second gear 346 keeps in the static state, the second gear 346 and the second gear 345 generate relative movement, the two groups of second gears 346 rotate synchronously to drive the third gear 341 to move in the containing groove 35, the height of the first sealing plate 341 is smaller than the width of the second sealing plate 341, and the second gear 346 extends out of the sealing plate 341 in the same direction as the opening at the track 2, and simultaneously, the sealing plate 341 extends out of the track 31 and the sealing plate 31 is prevented from extending out of the sealing plate 31 to the opening at the two sides of the track 2, and simultaneously.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.

Claims (10)

1. The underground exhaust system comprises two groups of air door bodies (1), wherein a closed cavity is formed between the two groups of air door bodies (1), the underground exhaust system is characterized in that the air door bodies (1) comprise switch doors (11), pressure release assemblies (13) are arranged on the switch doors (11), and the pressure release assemblies (13) are used for balancing the pressure difference inside and outside the cavity before the switch doors (11) are opened.

2. A downhole venting system according to claim 1, wherein the pressure relief assembly (13) comprises a pressure relief hole (111) and a control member, the pressure relief hole (111) extending through the switch door (11) and being in communication with the chamber, the control member being adapted to control the connectivity of the pressure relief hole (111) with the chamber.

3. The underground exhaust system according to claim 2, wherein the control member comprises an electric push rod (133) and a partition plate (132), the partition plate (132) is slidably mounted inside the switch door (11), the electric push rod (133) is fixedly mounted inside the switch door (11), and the output shaft is fixedly connected with the partition plate (132).

4. A downhole exhaust system according to claim 3, wherein the switch door (11) is provided with a chute (131), the chute (131) is arranged perpendicular to the pressure release hole (111) and is mutually communicated, and the partition (132) is arranged in the chute (131) and forms a sliding guiding fit with the chute (131).

5. A downhole venting system according to claim 3, wherein the partition (132) has a length and a width which are larger than the aperture of the pressure relief hole (111).

6. A downhole exhaust system according to claim 4, wherein a sealing ring is arranged at the connection of the pressure relief hole (111) and the chute (131).

7. The underground exhaust system according to claim 2, wherein each group of air door bodies (1) is provided with two groups of switch doors (11), each group of switch doors (11) is fixedly provided with a handle (14) with an L-shaped structure, the handles (14) are arranged at one side opening of the pressure release holes (111) away from the cavity, the handles (14) are hollow to form guide grooves (141), and the guide grooves (141) are communicated with the pressure release holes (111).

8. A downhole exhaust system according to claim 7, wherein the opposite sides of the two sets of switch doors (11) are provided with push plates (15), the push plates (15) being slidably connected to the switch doors (11).

9. A downhole venting system according to claim 8, wherein the partition (132) urges the two sets of push plates (15) towards and away from each other when sliding in the chute (131).

10. A downhole exhaust system according to claim 9, wherein the switch door (11) is further provided with a spring, and two ends of the spring are connected to the inner wall of the switch door (11) and the push plate (15), respectively.