CN117266909B - Underground exhaust system - Google Patents

Abstract

The present invention discloses an underground exhaust system, comprising two groups of damper bodies, a closed chamber is formed between the two groups of damper bodies, the damper body comprises a switch door, a pressure relief assembly is installed on the switch door, the pressure relief assembly is used to balance the pressure difference inside and outside the chamber before the switch door is opened; the pressure relief assembly provided by the present invention is opened before the switch door is opened, so that the inside and outside of the chamber are connected to each other, thereby balancing the pressure difference inside and outside the chamber, and the switch door is opened after the air pressure is balanced, thereby avoiding the problem of difficulty in opening the switch door due to air pressure imbalance.

Description

An underground ventilation system

Technical Field

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

Background Art

70% of my country's metal deposits are mined underground, which is relatively dangerous. Doing a good job in mine ventilation, building efficient underground intelligent ventilation structures, and planning and controlling underground airflow according to demand are the key points to effectively prevent all kinds of ventilation-related accidents. Damper is an important facility in the mine exhaust and ventilation system. First, it can prevent a large amount of toxic and harmful gases from invading and spreading to other well-ventilated workplaces, limit toxic and harmful gases to local areas, and then introduce toxic and harmful gases into the return air lane of the ventilation system to effectively prevent poisoning and casualties. Second, the airflow regulation function can be achieved by opening or closing the damper.

For example, a patent with publication number CN110985093B and publication date February 19, 2021, discloses a mine underground air door locking device, which relates to the field of mine ventilation, including a waterproof box, a top box, a bottom plate, and at least two door frames, wherein: the top of the waterproof box is open and the open end is sealed by the bottom plate, the bottom plate is flush with the tunnel floor, the door frame is installed on the side wall of the tunnel, and the tops of the two door frames are connected and fixed by the 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 slide groove, and a guide hole, and the The guide hole connects the interior of the top box with the interior of the waterproof box; a door panel is slidably installed inside the door slide groove, and the outer wall of the door panel and the inner wall of the door slide groove are sealed and slidably assembled; the top of the door panel is assembled and fixed with the chain block, and the chain block is assembled and fixed with one end of the first chain, and the first chain passes around the two first sprockets respectively and is assembled and fixed with the other door panel through another chain block; a connecting ring is provided at the bottom of the door panel, and the connecting ring is connected and fixed with one end of the second chain, and the other end of the second chain passes through the connecting sleeve and then passes around the two sixth sprockets respectively, and then passes through another connecting sleeve and the telescopic sleeve and is assembled and fixed with the connecting ring of the other door panel.

In the prior art, two sets of dampers are installed in the mine at the same time, and a sealed chamber is formed between the two sets of dampers. Due to the different pressure difference inside and outside the chamber, it is difficult to open the dampers under the effect of the pressure difference, which is time-consuming and laborious.

Summary of the invention

The purpose of the present invention is to provide an underground ventilation system to solve the above-mentioned deficiencies in the prior art.

In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: an underground exhaust system, comprising two groups of damper bodies, a closed chamber is formed between the two groups of damper bodies, the damper body comprises a switch door, a pressure relief assembly is installed on the switch door, the pressure relief assembly is used to balance the pressure difference inside and outside the chamber before the switch door is opened.

Furthermore, the pressure relief assembly includes a pressure relief hole and a control component. The pressure relief hole passes through the switch door and is connected to the chamber. The control component is used to control the connectivity between the pressure relief hole and the chamber.

Furthermore, the control component includes an electric push rod and a partition, the partition is slidably installed inside the switch door, the electric push rod is fixedly installed inside the switch door, and the output shaft is fixedly connected to the partition.

Furthermore, a limit groove is provided in the switch door, the limit groove and the pressure relief hole are arranged vertically and are interconnected, the partition is arranged in the limit groove and forms a sliding guide cooperation with the limit groove.

Furthermore, the length and width of the partition are both greater than the diameter of the pressure relief hole.

Furthermore, a sealing ring is installed at the connection point between the pressure relief hole and the limiting groove.

Furthermore, each set of damper bodies is provided with two sets of switch doors, and each set of switch doors is fixedly provided with an L-shaped handle, which is installed at the opening on the side of the pressure relief hole away from the chamber. The inside of the handle is hollow to form a guide groove, which is connected to the pressure relief hole.

Furthermore, a push plate is installed on the opposite side of the two groups of switch doors, and the push plate is slidably connected to the switch door.

Furthermore, when the partition plate slides in the limiting groove, the two groups of push plates are driven to move closer to or farther from each other.

Furthermore, a spring is installed inside the switch door, and two ends of the spring are respectively connected to the inner wall of the switch door and the push plate.

The beneficial effect of the present invention is that in the above technical scheme, the pressure relief component provided by the present invention is opened first before the switch door is opened, so that the inside and outside of the chamber are connected to each other, thereby balancing the pressure difference inside and outside the chamber, and then the switch door is opened after the air pressure is balanced, avoiding the problem of difficulty in opening the switch door due to air pressure imbalance.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

FIG1 is a schematic diagram of the front structure of a damper provided by an embodiment of the present invention;

FIG2 is a schematic diagram of the side structure of a damper provided by an embodiment of the present invention;

FIG3 is a partial sectional view of the side of the damper provided by an embodiment of the present invention;

FIG4 is a partial cross-sectional view of the front side of the damper provided by an embodiment of the present invention;

FIG5 is a schematic diagram of the structure of an iris mechanism provided by an embodiment of the present invention;

FIG6 is a schematic diagram of the front structure of a damper provided by another embodiment of the present invention;

FIG7 is a schematic diagram of the side structure of a damper provided by another embodiment of the present invention;

FIG8 is a schematic diagram of a partial structure of a switch door and a blocking plate provided in another embodiment of the present invention;

FIG9 is a cross-sectional view of the interior of a blocking plate provided by another embodiment of the present invention;

FIG10 is an enlarged view of point A in FIG6 provided by another embodiment of the present invention;

FIG11 is an enlarged view of point B in FIG7 provided by another embodiment of the present invention;

FIG12 is an enlarged view of point C in FIG9 provided by another embodiment of the present invention;

FIG. 13 is an enlarged view of point D in FIG. 9 provided by another embodiment of the present invention.

Description of reference numerals:

1. damper body; 11. switch door; 111. pressure relief hole; 12. arc groove; 13. pressure relief assembly; 131. limit groove; 132. partition; 133. electric push rod; 14. handle; 141. guide groove; 142. iris mechanism; 1421. rotating disk; 1422. fixed disk; 1423. connecting plate; 1424. guide column; 15. push plate; 2. track; 3. blocking mechanism; 31. blocking plate; 32. connecting assembly; 321. first Connecting rod; 322, first gear; 323, first rack; 33, limiting groove; 34, sealing assembly; 341, first sealing plate; 342, second sealing plate; 343, sleeve; 344, second connecting rod; 345, second rack; 346, second gear; 347, third rack; 35, accommodating groove; 4, driving mechanism; 41, bidirectional motor; 42, unidirectional transmission mechanism; 43, reciprocating mechanism; 44, active rack; 45, driven gear; 5, base.

DETAILED DESCRIPTION

In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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 therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

As shown in Figures 1 to 5, an embodiment of the present invention provides an underground exhaust system, which includes two groups of damper bodies 1. A closed chamber is formed between the two groups of damper bodies 1. The damper body 1 includes a switch door 11. A pressure relief assembly 13 is installed on the switch door 11. The pressure relief assembly 13 is used to balance the pressure difference inside and outside the chamber before the switch door 11 is opened.

Specifically, the two groups of damper bodies 1 are arranged vertically in the mine, and the damper bodies 1 are tightly fitted to the inner wall of the mine and sealed to form a closed chamber between the two groups of damper bodies 1. Due to the pressure difference between the two groups of damper bodies 1 in some sections, that is, the imbalance of air pressure inside and outside the chamber causes the damper body to get stuck when it is opened. Therefore, in this embodiment, a pressure relief component 13 is installed on the switch door 11. The pressure relief component 13 is used to balance the pressure difference inside and outside the chamber before the switch door 11 is opened. The pressure relief component 13 can be a pressure relief valve, etc. Before the damper body 1 needs to be opened, the pressure relief component 13 is opened first to connect the inside and outside of the chamber to each other, thereby balancing the pressure difference inside and outside the chamber. After the air pressure is balanced, the switch door 11 is opened. The opening of the switch door 11 can be driven by a rotating drive device such as a motor and a rotary cylinder, thereby avoiding the problem of difficulty in opening the switch door 11 due to air pressure imbalance.

Furthermore, the pressure relief assembly 13 includes a pressure relief hole 111 and a control component. The pressure relief hole 111 passes through the switch door 11 and is connected to the chamber. The control component is used to control the connectivity between the pressure relief hole 111 and the chamber.

Specifically, the pressure relief hole 111 is opened on the switch, and there are two groups of switch doors 11, and there are four groups of pressure relief components 13, which are respectively located on two pairs of switch doors 11 on two groups of damper bodies 1. The control component is installed inside the switch door 11, and the connectivity between the chamber and the pressure relief hole 111 is adjusted by the control component.

In an optional embodiment, preferably, the control component includes an electric push rod 133 and a partition 132 , the partition 132 is slidably installed inside the switch door 11 , the electric push rod 133 is fixedly installed in the switch door 11 , and the output shaft is fixedly connected to the partition 132 .

Specifically, a slide groove 131 is provided in the switch door 11, and the slide groove 131 is arranged vertically with the pressure relief hole 111 and is connected to each other. The partition plate 132 is arranged in the slide groove 131 and forms a sliding guide with the slide groove 131. The electric push rod 133 drives the partition plate 132 to slide in the slide groove 131. In actual use, when the two sets of switch doors 11 are in a closed state, the partition plate 132 is located in the hole. Because the length and width of the partition plate 132 are greater than the aperture of the pressure relief hole 111, the partition plate 132 is used. The extension of 32 can block the pressure relief hole 111, and a sealing ring is installed at the connection between the pressure relief hole 111 and the slide groove 131, which can enhance the sealing between the pressure relief hole 111 and the blocking plate. When the switch door 11 needs to be opened, the electric push rod 133 drives the partition 132 to slide in the slide groove 131, so that the partition 132 is separated from the pressure relief hole 111. At this time, the pressure relief hole 111 is opened, the chamber is connected with the external environment, and the air pressure is balanced, thereby avoiding the problem of the switch door 11 being difficult to open due to air pressure imbalance.

Furthermore, each set of damper bodies 1 is provided with two sets of switch doors 11, and each set of switch doors 11 is fixedly installed with an L-shaped handle 14, which is installed at the opening on the side of the pressure relief hole 111 away from the chamber. The handle 14 is hollow inside to form a guide groove 141, which is connected to the pressure relief hole 111.

Specifically, the handle 14 has an L-shaped structure, one end of the guide groove 141 is connected to the pressure relief hole 111, and the other end is open to the ground. When the switch door 11 needs to be opened, the electric push rod 133 drives the partition 132 to slide in the slide groove 131, so that the partition 132 is separated from the pressure relief hole 111. At this time, the pressure relief hole 111 is opened, and the air in the chamber will flow to the outside. At this time, the outward-flowing air enters the guide groove 141 from the pressure relief hole 111, and is introduced to the outside of the chamber through the guide groove 141. Because the other end of the guide groove 141 is open to the ground, the exhausted gas can be prevented from blowing toward the staff.

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

Specifically, in order to achieve the sealing of the two groups of switch doors 11 after closing, push plates 15 are installed on the 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 from the inside of the switch doors 11, and the two groups of push plates 15 are squeezed against each other, thereby improving the sealing between the two groups of switch doors 11.

In another embodiment provided by the present invention, further, when the partition plate 132 slides in the slide groove 131 , the two groups of push plates 15 are driven to move closer to or away from each other.

Specifically, the push plate 15 is located on one side of the partition 132, and a guide slope is installed on the side opposite to the partition 132 and the push plate 15. The partition 132 and the push plate 15 form a wedge-shaped fit through the guide slope, as shown in Figure 4, and a spring is also installed inside the switch door 11, and the two ends of the spring are respectively connected to the inner wall of the switch door 11 and the push plate 15. In actual use, when the partition 132 slides in the slide groove 131 and extends 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 the guide, and the two groups of push plates 15 approach and squeeze each other. At this time, the spring stretches, and the sealing between the two groups of switch doors 11 is improved by squeezing each other 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 guide slope on the partition 132 is separated from the push plate 15, and the push plate 15 is reset under the action of the spring and extends into the switch door 11. At this time, the two groups of push plates 15 are away from each other.

In another embodiment provided by the present invention, the handle 14 is rotatably connected to the switch door 11 , and an iris mechanism 142 is installed inside the switch door 11 .

Specifically, the iris mechanism 142 is installed at the connection point between the guide groove 141 and the pressure relief hole 111, and the two ends of the iris mechanism 142 are respectively connected to the groove wall of the guide groove 141 and the hole wall of the pressure relief hole 111. The iris mechanism 142 is a prior art and is not described in detail. The handle 14 is rotatably connected to the outer wall of the switch door 11 through a hinge shaft, and the opening and closing of the channel in the iris mechanism 142 are controlled by the rotation of the handle 14. In actual use, the handle 14 is initially in an upward vertical state, that is, the opening of the guide groove 141 in the handle 14 faces upward. At this time, the iris mechanism 142 is in a closed state, and the guide groove 141 is closed. The air is not connected to the pressure relief hole 111. When the damper body 1 needs to be opened, the staff manually rotates the handle 14 to rotate the handle 14 downward by 180°. The rotation of the handle 14 drives the iris mechanism 142 to rotate and opens the channel in the iris mechanism 142. The pressure relief hole 111 is connected to the guide groove 141 through the channel. At this time, the air flowing outward enters the guide groove 141 from the pressure relief hole 111 and is introduced to the outside of the chamber through the guide groove 141. Through the rotation setting of the handle 14, the handle 14 prompts the staff whether the damper body 1 is in the closed state or the state to be opened.

It should be supplemented that the iris mechanism 142 includes a rotating disk 1421 and a fixed disk 1422. The rotating disk 1421 is located in the guide groove 141 and is fixedly connected to the groove wall of the guide groove 141. The fixed disk 1422 is located in the pressure relief hole 111 and is fixedly connected to the hole wall of the pressure relief hole 111. A plurality of groups of connecting plates 1423 are installed between the rotating disk 1421 and the fixed disk 1422. The plurality of groups of connecting plates 1423 are enclosed to form a channel. Guide columns 1424 are installed at both ends of each group of connecting plates 1423. Slide grooves are provided on the rotating disk 1421 and the fixed disk 1422. The two groups of guide columns 1424 are respectively located in the two groups of slide grooves and form a sliding guide with the slide grooves. The slide grooves on the rotating disk 1421 are inclined, and the slide grooves on the fixed disk 1422 are arranged along the direction of the slide grooves. The handle 14 is radially arranged so that the directions of the two sets of slide grooves are inconsistent. This is the general structure of the iris mechanism 142 in the prior art. It will not be repeated. When the handle 14 is initially in an upward vertical state, that is, the opening of the guide groove 141 in the handle 14 is facing upward, the iris mechanism 142 is in a closed state at this time, that is, the guide column 1424 is at one end of the slide groove close to the central axis of the rotating disk 1421 or the fixed disk 1422. At this time, multiple seals squeeze each other and the channel is closed. When the handle 14 is rotated downward 180°, the rotation of the handle drives the rotating disk 1421 to rotate synchronously, while the fixed disk 1422 remains stationary. At this time, the slider moves from one end of the slide groove to the other end, and the spacing between the multiple sets of connecting plates 1423 is opened, that is, the channel is opened, and the iris mechanism is also in an open state.

As shown in FIGS. 6 to 13 , when a track 2 passes through the bottom of the switch door 11 , the present invention provides another embodiment, further comprising a blocking mechanism 3 and a driving mechanism 4 , wherein the driving mechanism 4 is used to drive the blocking mechanism 3 to rotate between the two sets of tracks 2 .

Specifically, the damper body 1 also includes a door frame, two sets of switch doors 11, namely a double switch door 11 structure, the switch door 11 is hinged to the door frame, and a driving component for driving the switch door 11 to rotate is installed at the bottom of the door frame. The driving component can be a rotating driving mechanism 4 such as a motor and a rotating cylinder and a corresponding transmission structure. The bottom combination of the two sets of switch doors 11 is provided with a rectangular opening, and the track 2 passes through the switch door 11 through the rectangular opening. This is a prior art and is not repeated here. The blocking mechanism 3 can be a plate body rotatably installed below the rectangular opening. The plate body is located below the two sets of tracks when the damper body 1 is opened. The driving mechanism 4 can also be a rotating driving mechanism 4 such as a motor and a rotating cylinder. When the driving mechanism 4 is a motor, the motor is installed at the bottom of the damper body 1, and the output end is connected to the plate body. In actual use, after the switch door 11 is closed by the drive component, the bottom combination of the two sets of switch doors 11 forms a rectangular opening, and the track 2 is located in the rectangular opening. At this time, the motor drives the plate body to rotate into the rectangular opening to seal the rectangular opening.

The present invention provides a blocking mechanism 3 and a driving mechanism 4, wherein the driving mechanism 4 drives the blocking mechanism 3 to rotate between the two sets of tracks 2, and blocks the area between the two sets of tracks 2 by the blocking mechanism 3, thereby preventing the setting of the tracks 2 from affecting the air flow isolation of the air door in the mine.

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

Specifically, the interior of the base 5 is hollow, the track 2 and the plate body are installed on the base 5, and the driving mechanism 4 is installed in the base 5. In actual use, the base 5 can be buried in the ground of the mine so that the upper surface of the base 5 and the ground of the mine are in the same straight line. The blocking mechanism 3 can be a plate body, the bottom of the plate body extends into the base 5 and is connected to the driving mechanism 4. The base 5 supports the damper body 1 and accommodates the driving mechanism 4.

In another embodiment provided by the present invention, further, the damper body 1 is installed with two groups, which are respectively located at two ends of the base 5.

Specifically, the damper body 1 is arranged vertically on the base 5, and the two groups of damper bodies 1 are respectively located at the two ends of the base 5. A sealed chamber is formed between the two groups of damper bodies 1, and the two groups of damper bodies 1 are respectively located at the two ends of the chamber. In actual use, when one group of damper bodies 1 is opened, the other group of damper bodies 1 is in a locked closed state, that is, only one end of the chamber is allowed to connect to the external environment, thereby playing a pressure stabilizing role in isolating the windflow.

In another embodiment provided by the present invention, further, the blocking mechanism 3 includes a blocking plate 31 , on which a connecting component 32 is installed, and the connecting component 32 is used to drive the blocking plate 31 to fit on the bottom of the damper body 1 .

In an optional embodiment, preferably, the connecting assembly 32 includes a first connecting rod 321 movably mounted on one end of the blocking plate 31, the first connecting rod 321 is in a T-shaped structure, an arc-shaped groove 12 is provided at the bottom of the switch door 11, one end of the first connecting rod 321 forms a sliding guide fit with the arc-shaped groove 12, and one end of the first connecting rod 321 slides to the bottom wall of the arc-shaped groove 12 to form a limiting interference fit.

Specifically, the damper body 1 includes a switch door 11 and a door frame, an arc groove 12 is opened at the bottom of the switch door 11, and the opening of the arc groove 12 is located on a side of the switch door 11 facing the chamber. In actual use, when the damper needs to be closed, the motor first drives the two sets of switch doors 11 to close. At this time, the bottoms of the two sets of switch doors 11 and the two sets of tracks 2 surround a rectangular opening, and the two sets of tracks 2 are located on both sides of the rectangular opening. When the driving mechanism 4 drives the blocking plate 31 to rotate from a horizontal state to a vertical state, that is, from the base 5 to the rectangular tube opening, during the rotation process, one end of the first connecting rod 321 gradually enters the arc groove 12. After the blocking plate 31 is completely rotated to a vertical state, one end of the first connecting rod 321 The first end completely enters the bottom of the arc groove 12, and the first connecting rod 321 is limited in the arc groove 12 at this time. Since the switch door 11 rotates around the Y axis, that is, around the vertical axis, and the blocking plate 31 rotates around the X axis, that is, around the horizontal axis, since the blocking plate 31 and the switch door 11 have different rotation directions, the opening of the damper requires first disengaging the first connecting rod 321 from the arc groove 12, and then driving the damper body 1 to rotate. Therefore, under the restriction of the first connecting rod 321, when the blocking plate 31 does not rotate, the corresponding damper body 1 is in a locked state. Therefore, the rotation of the blocking plate 31 can not only realize the sealing between the damper body 1 and the track 2, but also realize the locking and unlocking of the damper body 1.

In another embodiment provided by the present invention, further, the connecting assembly 32 also includes a first gear 322 and a first rack 323, the first gear 322 is installed on one end of the first connecting rod 321 extending into the arc groove 12, and meshes with the first rack 323, and the other end of the first connecting rod 321 extends into the interior of the blocking plate 31 and is rotatably connected to the blocking plate 31.

Specifically, the first gear 322 is a bevel gear, and the first rack 323 is provided with a helical tooth groove adapted to the first gear 322. The end of the rotation stroke of the sealing plate 31 is a locking stroke, and the locking stroke starts from the 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, due to the rotation stroke of the first connecting rod 321, the first gear 322 and the first rack 323 are forced to rotate relative to each other, causing the first gear 322 to rotate, and the rotation of the first gear 322 drives the first connecting rod 321 to rotate while revolving. It should be supplemented that since the combination of the first connecting rod 321 and the first gear 322 is T-shaped, the longitudinal section of the arc groove 12 is also T-shaped. The first gear 322 is restricted inside the arc groove 12, and the first gear 322 is blocked by the groove wall of the arc groove 12, so the first gear 322 will not disengage from the arc groove 12.

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

Specifically, since the damper body 1 is provided with two groups, and the two groups of damper bodies 1 correspond to the two groups of blocking plates 31, in the present embodiment, the driving mechanism 4 is provided with two groups, corresponding to the two groups of blocking plates 31 respectively. The driving mechanism 4 can be a rotating mechanism with a motor, a rotating cylinder, etc. The two groups of driving mechanisms 4 respectively drive the two groups of blocking plates 31 to rotate, and the two groups of motors respectively correspond to the two groups of blocking plates 31. When one group of motors is working, the other group of motors is temporarily stopped. When the motors are working, the output shafts of the motors drive the blocking plates 31 to rotate in the base 5. Since the two groups of motors are not started at the same time, when one group of motors is working, that is, the blocking plates 31 rotate from a vertical state to a horizontal state, the corresponding damper body 1 is unlocked and then opened, and the blocking plates 31 corresponding to the other group of motors are maintained in a vertical state, and the damper body 1 corresponding to the blocking plates 31 is also in a locked state, thereby preventing the two groups of damper bodies 1 from being opened at the same time.

In an optional embodiment, preferably, the driving mechanism 4 includes a bidirectional motor 41, a one-way transmission mechanism 42, a reciprocating mechanism 43 and an active rack 44. The two output ends of the bidirectional motor 41 are connected to the reciprocating mechanism 43 through the one-way transmission mechanism 42. The reciprocating mechanism 43 is used to drive the active rack 44 to move back and forth in a straight line. The sealing plate 31 is rotatably connected to the base 5 through a hinge shaft. A driven gear 45 is installed at one end of the base 5, and the driven gear 45 is meshed with the active rack 44.

Specifically, only one group of the bidirectional motor 41 is required, and two groups of the one-way transmission mechanism 42, the reciprocating mechanism 43, the active rack 44 and the driven gear 45 are arranged, which correspond to the two output ends of the bidirectional motor 41 respectively, and are all installed in the base 5. The two groups of one-way transmission mechanisms 42 are respectively connected to the two output ends of the bidirectional motor 41. The one-way transmission mechanism 42, such as the ratchet pawl mechanism, is the prior art and will not be described in detail. The rotation restriction directions of the two groups of one-way transmission mechanisms 42 are opposite. The reciprocating mechanism 43 is a reciprocating screw assembly. The reciprocating screw assembly is the prior art and its specific composition will not be described in detail. The reciprocating screw in the reciprocating screw assembly is connected to the output shaft of the bidirectional motor 41 through the one-way transmission mechanism 42. The active rack 44 is connected to the slider in the reciprocating screw assembly. When the reciprocating screw rotates, the reciprocating linear movement of the slider drives the active rack 44 to move synchronously. In actual use, the two groups of damper bodies 1 include the following two states:

Initial state: Both damper bodies 1 are in a closed state, both blocking plates 31 are vertically arranged between the two rails 2, the first gear 322 at one end of the first connecting rod 321 extends into the arc groove 12 at the bottom of the switch door 11, the bidirectional motor 41 is in a pause state, and the two blocking plates 31 make the two damper bodies 1 in a locked state;

Select an open state: when a staff member or a mine car needs to pass through the damper, the corresponding damper body 1 needs to be opened. During the opening process, the bidirectional motor 41 starts to work and drives the output shaft thereon to rotate. Since the forward and reverse rotations of the output shaft correspond to different blocking plates 31 and switch doors 11 respectively, the operator can determine the specific rotation direction of the output shaft according to the damper body 1 that needs to be opened. Therefore, assuming that the output shaft rotates forward at this time, the two output ends on the output shaft rotate forward synchronously, and one of the output ends drives the reciprocating screw in the reciprocating mechanism 43 to rotate through the one-way transmission mechanism 42. Since the rotation limit directions of the two sets of one-way transmission mechanisms 42 are opposite, the other output end idles in the other one-way transmission mechanism 42, that is, one of them The first gear 322 at one end of the first connecting rod 321 extends out from the arc groove 12 at the bottom of the switch door 11, and the locking state of the damper body 1 corresponding to the blocking plate 31 is released, and then the damper body 1 is opened by the motor;

Corresponding to the closed state: after one set of damper bodies 1 is opened, the staff or the mine car enters the area between the two sets of damper bodies 1. At this time, the damper body 1 that has just been opened needs to be closed again. The switch door 11 rotates and closes first, and then the bidirectional motor 41 continues to rotate forward, and the slider on the reciprocating screw drives the active rack 44 to reset and move. The reset movement of the active rack 44 drives the driven gear 45 to reset and rotate, and the driven gear 45 drives the blocking plate 31 to rotate from the horizontal state to the vertical state and rotate between the two sets of tracks 2 to block the area between the two sets of tracks 2. The first gear 322 at one end of the first connecting rod 321 extends into the arc groove 12 again, and the damper body 1 is in the locked state again;

Finally, another set of damper bodies 1 is opened to allow the staff and the mine car to pass through the damper smoothly. At this time, the bidirectional motor 41 drives the output shaft to rotate in the opposite direction, and the above steps are repeated. The output shaft of the bidirectional motor 41 drives another blocking plate 31 to rotate through another set of one-way transmission mechanisms 42 and reciprocating mechanisms 43, and releases the lock of the other damper body 1. After the staff and the mine car pass through the damper body 1, the damper body 1 is closed again, and the bidirectional motor 41 continues to drive the output shaft to rotate in the opposite direction, so that the blocking plate 31 is reset and rotated, and the damper body 1 is locked again.

In summary, under the drive of the output shaft of the bidirectional motor 41, the two groups of damper bodies 1 can be controlled, and no matter in which direction the output shaft of the bidirectional motor 41 rotates, and drives one group of sealing plates 31 to rotate and release the lock of the damper body 1, the other group of damper bodies 1 must be in a locked state.

In another embodiment of the present invention, the cross section of the track 2 is I-shaped, and a sealing assembly 34 is installed inside the blocking plate 31. The sealing assembly 34 is used to block the openings of the two groups of tracks 2 on the side close to each other.

Specifically, since the cross-section of the track 2 is I-shaped, C-shaped openings are provided on both sides of the track 2, and the blocking plate 31 is a rectangular plate-shaped structure, and it is difficult to seal the openings on both sides of the blocking plate 31. Since the switch door 11 and the blocking plate 31 rotate in different directions, after the damper is closed, the switch door 11 is attached to the side of the two groups of tracks 2 that are away from each other, and a rubber pad is provided on the side where the switch door 11 and the track 2 are attached to each other, and a sealing connection between the switch door 11 and the track 2 is achieved through the rubber pad. During the rotation of the blocking plate 31, in order to seal the openings on the side where the two groups of tracks 2 are close to each other, a sealing component 34 is installed inside the blocking plate 31, and the sealing component 34 is used to extend from the blocking plate 31 during the rotation of the blocking plate 31. The sealing component 34 is used to seal the two groups of tracks. The opening on one side where the tracks 2 are close to each other can be made into a C-shaped sealing plate that is consistent with the shape of the opening of the track 2. After the sealing plate 31 is rotated from a horizontal state to a vertical state, that is, after the switch door 11 is locked, the sealing plate extends from the inside of the sealing plate 31 and extends into the opening of the track 2. The sealing assembly 34 is provided with two groups, that is, the sealing plates are provided with two groups, and the two groups of sealing plates move simultaneously to seal the openings on one side where the two groups of tracks 2 are close to each other. When the sealing plate 31 needs to be rotated from a vertical state to a horizontal state, the sealing plate is first retracted into the inside of the sealing plate 31, and then the sealing plate 31 is rotated. Secondly, a linear driving mechanism 4 such as a cylinder and an electric telescopic rod can be provided inside the sealing plate 31, and the sealing plate is driven to extend in and out of the sealing plate 31 through the linear driving mechanism 4.

In an optional embodiment, preferably, the sealing assembly 34 includes a sealing member and a linkage member, and the linkage member is used to drive the sealing member to extend out from the sealing plate 31 during the rotation of the sealing plate 31.

Specifically, the seal includes a first sealing plate 341 and a second sealing plate 341. A receiving groove 35 is opened inside the sealing plate 31. The first sealing plate 341 is located in the receiving groove 35 and forms a sliding guide with the receiving groove 35. The first sealing plate 341 is provided with two groups, corresponding to the two groups of tracks 2 respectively. The second sealing plate 341 is located inside the first sealing plate 341. Each group of first sealing plates 341 is provided with two groups of second sealing plates 341. The linkage member includes a sleeve 343 and a second rack 345. The end of the first connecting rod 321 away from the first gear 322 extends into the receiving groove 35. The sleeve 343 is arranged at the end of the first connecting rod 321 extending into the receiving groove 35. The sleeve 343 is threadedly connected to the first connecting rod 321. A limiting groove 33 is provided at the top of the receiving groove 35. The sleeve 343 and the limiting groove 33 are both polygonal columnar structures. The sleeve 343 and the limiting groove 33 form a sliding guide and form a groove wall structure with the limiting groove 33. The first connecting rod 321 is provided with a thread at the bottom, and the thread at the bottom is meshed with the sleeve 343, and drives the sleeve 343 to slide in the limiting groove 33. The second connecting rod 344 is installed at the bottom of the sleeve 343. One end of the second connecting rod 344 is rotatably connected to the bottom of the sleeve 343, and the other end is rotatably connected to the first sealing plate 341. One end of the second rack 345 is fixedly connected to the groove wall of the accommodating groove 35, and the other end extends into the first sealing plate 341. A second gear 346 is installed inside the first sealing plate 341, and the second gear 346 meshes with the second rack 345. A third rack 347 is installed on the side of the second sealing plate 341 close to the second gear 346. The second gear 346 is provided with two groups. The two groups of second gears 346 are coaxially arranged and are both installed in the first sealing plate 341, and mesh with the second rack 345 and the third rack 347 respectively. The second rack 345 and the third rack 347 are perpendicular to each other.

When the blocking 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 groove 12 and meshes with the first gear 322. The first connecting rod 321 rotates during the revolution. The rotation of the first connecting rod 321 drives the sleeve 343 to slide in the limiting groove 33 toward the side away from the closing door 11 and gradually approaches the first sealing plate 341. Driven by the second connecting rod 344, the sliding of the sleeve 343 pushes the first sealing plate 341 to slide in the receiving groove 35 and extend from the opening on the side of the blocking plate 31. Since the height of the second sealing plate 341 is less than the width of the opening on the side of the track 2, the extension of the first sealing plate 341 does not conflict with the track 2. At the same time, the movement of the first sealing plate 341 drives the second gear 346 to move synchronously. Since the second rack 345 is fixed in the receiving groove 35, the second The rack 345 remains stationary, the second gear 346 and the second rack 345 move relative to each other, the second gear 346 rotates in the first sealing plate 341, and the two groups of second gears 346 rotate synchronously, driving the third rack 347 to move along the height direction of the first sealing plate 341. Since the third rack 347 is connected to the second sealing plate 341, the two groups of second sealing plates 341 extend synchronously from the upper and lower sides of the first sealing plate 341. During the extension process, the components make up for the difference between the height of the first sealing plate 341 and the width of the side opening of the track 2, thereby achieving complete sealing of the track 2 opening. Similarly, when the sealing plate 31 rotates from a vertical state to a horizontal state, that is, when the damper body 1 is opened, the first sealing plate 341 extends into the second sealing plate 341, and at the same time, the second sealing plate 341 extends into the sealing plate 31, thereby avoiding the phenomenon of the sealing plate 31 getting stuck during the rotation process.

The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that, for those skilled in the art, the described embodiments can be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

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), and 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), the pressure release assemblies (13) are used for balancing the pressure difference between the inside and the outside of the cavity before the switch doors (11) are opened, and a track (2) penetrates through the bottoms of the switch doors (11);

The device also 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 the two groups of rails (2);

a base (5) is arranged at the bottom of the air door body (1), the track (2) is fixedly connected to the base (5), and the driving mechanism (4) is arranged in the base (5);

the plugging mechanism (3) comprises a plugging plate (31), a connecting component (32) is arranged on the plugging plate (31), and the connecting component (32) is used for driving the plugging plate (31) to be attached to the bottom of the air door body (1);

The connecting component (32) comprises a first connecting rod (321) movably arranged at one end of the plugging plate (31), the first connecting rod (321) is of a T-shaped structure, an arc-shaped groove (12) is formed at the bottom of the switch door (11), one end of the first connecting rod (321) and the arc-shaped groove (12) form sliding guide fit, one end of the first connecting rod (321) slides to the bottom wall of the arc-shaped groove (12) to form limit interference fit,

When the air door is required to be closed, the motor drives the two groups of opening and closing doors (11) to be closed, at the moment, the bottoms of the two groups of opening and closing doors (11) and the two groups of tracks (2) enclose a rectangular opening, the two groups of tracks (2) are positioned at two sides of the rectangular opening, the driving mechanism (4) drives the plugging plate (31) to rotate from a horizontal state to a vertical state, namely from the inside of the base (5) to the rectangular opening, in the rotating process, one end of the first connecting rod (321) gradually enters the arc-shaped groove (12), after the plugging plate (31) is completely rotated to be in the vertical state, one end of the first connecting rod (321) completely enters the groove bottom of the arc-shaped groove (12), at the moment, the first connecting rod (321) is limited in the arc-shaped groove (12), because the opening and closing doors (11) rotate around the Y axis, namely around the vertical axis, and the plugging plate (31) rotates around the horizontal axis, and the first connecting rod (321) is separated from the arc-shaped groove (12) when the first connecting rod (321) is required to be opened, and the first connecting rod (1) is not locked and is firstly rotated, and then the first connecting rod (1) is correspondingly rotated, so the rotation of the plugging plate (31) not only can realize the sealing between the air door body (1) and the track (2), but also can realize the locking and unlocking of the air door body (1);

The connecting assembly (32) further comprises a first gear (322) and a first rack (323), the first gear (322) is arranged at one end of the first connecting rod (321) extending into the arc-shaped groove (12) and meshed with the first rack (323), and the other end of the first connecting rod (321) extends into the plugging plate (31) and is rotationally connected to the plugging plate (31);

The first gear (322) is the bevel gear, the skewed tooth groove with first gear (322) adaptation is offered to first rack (323), the end of shutoff board (31) rotation stroke is locking stroke, locking stroke is from first rack (323) meshing on first gear (322) and arc wall (12) on first connecting rod (321), at this moment, because the rotation stroke of first connecting rod (321) forces first gear (322) and first rack (323) to take place relative rotation, make first gear (322) rotation, and the rotation of first gear (322) drives first connecting rod (321) rotation in the revolution, because first connecting rod (321) and first gear (322) combination are the T type, the longitudinal section of arc wall (12) is the T type too, first gear (322) are restricted in arc wall (12) inside, first gear (322) are blocked by arc wall (12) cell wall, so first gear (322) can not break away from in arc wall (12).

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.