CN217872891U - Automatic reset explosion-proof device for coal mine air return vertical shaft - Google Patents

Abstract

The utility model provides a colliery return air shaft automatic re-setting explosion-proof equipment, including the explosion-proof cover, guiding mechanism, stay cord and counterweight, at least two sets of guiding mechanism encircle explosion-proof cover periphery evenly distributed, every guiding mechanism of group includes the support, the fixed pulley, perpendicular guide, sliding part and buffering subassembly, colliery return air shaft peripheral position is all located immediately to support and perpendicular guide, the sliding part slides and sets up on perpendicular guide, the buffering unit mount is on perpendicular guide and interval arrangement in the sliding part top, two fixed pulleys are rotationally installed on the support, every guiding mechanism of group corresponds and sets up a stay cord and a counterweight, every stay cord is around locating on the fixed pulley that corresponds, every stay cord one end is connected on the explosion-proof cover, counterweight is connected to its other end. The device can solve the problem that the explosion-proof cover is deformed due to bearing of mine impact airflow, and the automatic resetting of the explosion-proof cover is realized after the impact airflow disappears.

Description

Automatic reset explosion-proof device for coal mine air return vertical shaft

Technical Field

The utility model relates to a mine ventilation technical field, concretely relates to colliery return air vertical automatic re-setting explosion-proof equipment.

Background

In the coal mine industry, china implements a safety production license system, ventilation safety is the first major thing, and protection of a main ventilator is an important link. The main return air vertical shaft in front of the mining main ventilator is provided with an explosion door (cover) for protecting the main ventilator. When normal ventilation is carried out, the pressure in the well is lower than the atmospheric pressure, the explosion door (cover) keeps air tightness, underground airflow is isolated from the ground atmosphere, the short circuit of the airflow is prevented, and the normal ventilation system is ensured. When explosion accidents (gas and coal dust) happen underground, the explosion-proof door (cover) is opened by the impact airflow, the explosion airflow is directly released to the ground, the explosion airflow is prevented from impacting the main ventilator, and the safety of the main ventilator is ensured. When accidents (fire and toxic gas) occur in the underground air inlet roadway, the air must be forced to return in a short time, so that the accident loss is reduced; when the wind is against the wind, the air pressure in the well is higher than the atmospheric pressure, and the explosion-proof door (cover) must be locked before the wind is against the wind, so as to prevent the short circuit of the wind current.

The explosion door (cover) at the present stage adopts a cone hopper-shaped structure, four groups of brackets are uniformly distributed outside the circumference of the explosion door (cover), the brackets are provided with fixed pulleys, steel ropes of four counter weight hammers are connected with the explosion door (cover) through the fixed pulleys of the brackets, the counter weight hammers are used for offsetting most of the gravity of the explosion door body, and when an impact airflow acts on the explosion door, the explosion door is easy to open, the impact airflow is released, and a main ventilator is protected. When the mine needs to be ventilated, the eight uniformly distributed outer pressing plates on the periphery of the explosion-proof cover are rotated by 90 degrees, one end of each outer pressing plate is pressed on the explosion-proof door (cover), and the explosion-proof door (cover) is locked by screwing the nuts.

However, such an explosion vent (cover) for protecting the main ventilator has the following disadvantages:

1. a large number of facts prove that the explosion door (cover) for protecting the main ventilator can effectively protect the main ventilator, but the explosion door (cover) is seriously deformed after bearing impact airflow, cannot be automatically reset and only can be provided with a spare explosion door (cover). The explosion door (cover) has large volume, several tons of weight, offset position and long time for reinstalling the spare explosion door (cover). Which is the valuable time for tissue rescue after a downhole explosion.

2. After receiving the counter-wind instruction, the on-duty personnel of the main ventilator changes the wind flow direction in the tunnel within ten minutes. After receiving the anti-wind instruction, the person on duty must stop and brake the impeller immediately, and send the person to lock the explosion-proof door (cover); after the two steps are finished, the main ventilator is started to supply air reversely. The smaller the time for changing the direction of the wind flow in the roadway is, the more the accident loss can be reduced, the key is to shorten the time for locking the explosion door (cover), and the more the person on duty runs to the explosion door (cover) from the duty room, the longer the time is for installing eight pressing plates.

SUMMERY OF THE UTILITY MODEL

In view of the above, the utility model provides a colliery return air vertical automatic re-setting explosion-proof equipment to solve because of explosion-proof lid bears the mine and assaults the problem that the air current caused the deformation, and realize assaulting the air current and disappear back explosion-proof lid automatic re-setting, thereby solve one of above-mentioned technical problem at least.

The technical scheme of the utility model:

the utility model provides a colliery return air shaft automatic re-setting explosion-proof equipment, including the explosion-proof cover, guiding mechanism, stay cord and counterweight, at least two sets of guiding mechanism encircle explosion-proof cover periphery evenly distributed, every guiding mechanism of group includes the support, the fixed pulley, perpendicular guide, sliding part and buffering subassembly, colliery return air shaft peripheral position is all located immediately to support and perpendicular guide, the sliding part slides and sets up on perpendicular guide, the buffering unit mount is on perpendicular guide and interval arrangement in the sliding part top, two fixed pulleys are rotationally installed on the support, every guiding mechanism of group corresponds and sets up a stay cord and a counterweight, every stay cord is around locating on the fixed pulley that corresponds, every stay cord one end is connected on the explosion-proof cover, counterweight is connected to its other end.

Furthermore, the explosion-proof cover includes upper cone and lower cone, and the bottom surface of upper cone and the bottom surface laminating of lower cone and fixed connection.

Furthermore, the vertical guide part adopts a guide rail provided with a guide groove, the sliding part comprises a connecting piece fixed at the peripheral position of the upper surface of the explosion-proof cover and a guide wheel rotatably arranged on the connecting piece, and the guide wheel can be arranged in the guide groove of the guide rail in a rolling manner.

Furthermore, the counterweight part comprises an upper counterweight hammer, a lower counterweight hammer and a connecting rope connected between the upper counterweight hammer and the lower counterweight hammer, and the upper counterweight hammer is connected to one end of the pull rope.

Furthermore, the anti-wind locking device is further included, the anti-wind locking device comprises a locking buckle and a control portion, the locking buckles are uniformly distributed at the periphery of the explosion-proof cover and comprise a lock pin, a mounting seat and a telescopic driving piece, the lock pin can be installed on the mounting seat along the radial sliding of the explosion-proof cover, the telescopic driving piece is installed on the mounting seat, the driving end of the telescopic driving piece is connected with the lock pin, the lock pin is driven to be locked or separated from the explosion-proof cover, and the control portion is used for controlling the telescopic action of the telescopic driving piece.

Furtherly, locking is detained and is included the protection casing, and the protection casing cover is located on the flexible driving piece and is fixed in on the mount pad.

Furthermore, the buffer assembly comprises an elastic element sleeved on the vertical guide element.

Furthermore, the buffer assembly further comprises a fixing block fixed on the vertical guide piece, and the upper end of the elastic piece is fixed on the fixing block.

Further, the buffer assembly further comprises a contact plate connected to the lower end of the elastic member.

Further, the pull rope is a steel wire rope.

The utility model has the advantages that:

the utility model discloses an automatic reset explosion-proof device of a coal mine air return vertical shaft, when the impact airflow in the shaft acts on the lower surface of an explosion-proof cover, an upward axial force is generated to push open the explosion-proof cover, the lower edge of the explosion-proof cover moves upward along a vertical guide piece, and the impact airflow is released outwards; when the vertical guide piece rises to a certain height, the counterweight piece lands and loses the counterweight function, so that the rising resistance of the explosion-proof cover is increased; if the acting force of the impact air flow is increased and the explosion-proof cover rises intermittently, the explosion-proof cover stops under the action of the buffer assembly at the upper end of the vertical guide piece, so that the explosion-proof cover can be prevented from deforming; along with the incessant release of impact air current, impact air current effort reduces, and explosion-proof cover descends along perpendicular guide, and the back that the impact air current effort disappears, explosion-proof cover because self action of gravity descends, rises through stay cord pulling counterweight and leaves ground, offsets the partial gravity of explosion-proof cover through counterweight, can slow down the impact force when explosion-proof cover descends to reset, prevents that explosion-proof cover warp.

The preferred embodiments of the present invention and their advantageous effects will be described in further detail with reference to specific embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings, there is shown in the drawings,

fig. 1 is a schematic sectional view showing the use state of the automatic reset explosion-proof device for the coal mine air return vertical shaft of the present invention;

fig. 2 is a schematic plan view of the coal mine air return vertical shaft automatic reset explosion-proof device in use state;

FIG. 3 is an enlarged view of the guiding mechanism of the coal mine air return vertical automatic resetting explosion-proof device of the utility model;

fig. 4 is the enlarged view of the locking buckle of the coal mine air return vertical shaft automatic reset explosion-proof device.

The reference numbers indicate: the explosion-proof cover comprises an explosion-proof cover 1, a guide mechanism 2, a pull rope 3, a weight 4, a bracket 21, a fixed pulley 22, a vertical guide 23, a sliding part 24, a buffer component 25, an upper cone 11, a lower cone 12, a connecting piece 241, a guide wheel 242, an elastic piece 251, a fixed block 252, a contact plate 253, an upper weight hammer 41, a lower weight hammer 42, a connecting rope 43, a locking buckle 5, a locking pin 51, a mounting seat 52, a telescopic driving piece 53 and a protective cover 54.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It should be understood that the description herein is provided for illustration and explanation of the invention and is not intended to limit the invention.

Please refer to fig. 1 to 4, the utility model provides a colliery return air shaft automatic re-setting explosion-proof equipment, locate colliery return air shaft mouth including the lid explosion-proof cover 1, guiding mechanism 2, stay cord 3 and counterweight 4, four group's guiding mechanism 2 encircle explosion-proof cover 1 periphery evenly distributed, every group guiding mechanism 2 includes support 21, the fixed pulley 22, perpendicular guide 23, sliding part 24 and buffering subassembly 25, colliery return air shaft peripheral position is all located immediately to support 21 and perpendicular guide 23, sliding part 24 slides and sets up on perpendicular guide 23, buffering subassembly 25 is installed on perpendicular guide 23 and interval arrangement in sliding part 24 top, two fixed pulleys 22 rotationally install on support 21. Each group of guide mechanisms 2 is correspondingly provided with a pull rope 3 and a counterweight 4, each pull rope 3 is wound on two corresponding fixed pulleys 22, one end of each pull rope 3 is connected on the explosion-proof cover 1, and the other end of each pull rope 3 is connected with the counterweight 4.

The utility model discloses an explosion-proof device of colliery air return vertical shaft automatic re-setting, when the interior impact air current acts on the lower surface of explosion-proof cover 1, produce the upward axial force and push open explosion-proof cover 1, the explosion-proof cover 1 moves upward along vertical guide 23 down, the impact air current is externally released; when the vertical guide 23 rises to a certain height, the counterweight 4 is grounded and loses the counterweight function, so that the rising resistance of the explosion-proof cover 1 is increased; if the acting force of the impact air flow is increased and the explosion-proof cover 1 rises intermittently, the explosion-proof cover 1 stops under the action of the buffer assembly 25 at the upper end of the vertical guide piece 23, so that the explosion-proof cover 1 can be prevented from deforming; along with the continuous release of the impact air current, the impact air current acting force is reduced, the explosion-proof cover 1 descends along the vertical guide piece 23, after the impact air current acting force disappears, the explosion-proof cover 1 descends due to the self gravity action, the weight piece 4 is pulled by the pull rope 3 to ascend and leave the ground, partial gravity of the explosion-proof cover 1 is offset by the weight piece 4, the impact force generated when the explosion-proof cover 1 descends and resets can be reduced, and the deformation of the explosion-proof cover 1 is prevented.

In this embodiment, the guide mechanisms 2 are provided with four groups, but not limited thereto, and the guide mechanisms 2 may be provided in two groups, or three, five, or more groups may be arranged uniformly.

In this embodiment, the explosion-proof cover 1 includes an upper cone 11 and a lower cone 12, and the bottom surface of the upper cone 11 is attached to and fixedly connected with the bottom surface of the lower cone 12. When in use, the upper cone 11 protrudes out of the well, and the lower cone 12 penetrates into the well. The explosion-proof cover 1 adopts an upper cone structure and a lower cone structure which are matched with the upper cone 11 and the lower cone 12, when normal ventilation is carried out, the upper cone 11 can effectively bear negative pressure of a mine, the lower cone 12 greatly enhances the rigidity of the explosion-proof cover 1 and prevents the deformation of the explosion-proof cover 1, and when the explosion-proof cover 1 is influenced by impact airflow in the mine, the lower cone 12 can enable radial acting force to be mutually counteracted and smoothly lead the impact airflow out of the mine.

In this embodiment, the vertical guide 23 is a guide rail having a guide groove, the sliding part 24 includes a connecting member 241 fixed to a peripheral position of the upper surface of the explosion-proof cover 1, and a guide wheel 242 rotatably mounted on the connecting member 241, and the guide wheel 242 is rollably disposed in the guide groove of the guide rail. The design structure is simple and practical, the installation is convenient, the manufacturing cost is low, and the device can be well adapted to the working environment of the coal mine return air vertical shaft. It will be appreciated that the vertical guide 23 may be a guide shaft, and the sliding portion 24 may be a linear bearing slidably fitted on the guide shaft. Further, the vertical guide 23 may be a guide rail, and the slide portion 24 may be a slider slidably disposed on the guide rail.

In this embodiment, two fixed pulleys 22 are horizontally arranged on each bracket 21, but the number of the fixed pulleys 22 on each bracket 21 is not limited to this, and may be one or more, and may be selected according to actual requirements.

In this embodiment, the buffering assembly 25 includes an elastic member 251 sleeved on the vertical guide 23, and the elastic member 251 can be a spring. To facilitate the fixing of the elastic member 251, the buffering assembly 25 further includes a fixing block 252 fixed to the vertical guide 23, and the upper end of the elastic member 251 is fixed to the fixing block 252. In order to better achieve uniform cushioning of collision with the sliding portion 24, the cushioning assembly 25 further includes a contact plate 253 coupled to a lower end of the elastic member 251.

In this embodiment, the pull rope 3 is a steel wire rope, and the steel wire rope can bear the weight of the explosion-proof cover 1, and can realize sliding friction with the fixed pulley 22, thereby ensuring stable lifting of the explosion-proof cover 1.

In this embodiment, the weight member 4 includes an upper weight hammer 41, a lower weight hammer 42 and a connecting rope 43 connected between the upper weight hammer 41 and the lower weight hammer 42, the upper weight hammer 41 is connected to one end of the pull rope 3, and the upper weight hammer 41 is always in a suspended state during the lifting process of the explosion-proof cover 1. The connecting rope 43 may be a flexible connecting member such as a steel link chain or a steel wire rope. When gas explodes, the weight of the weight piece 4 offsets most of the weight of the explosion-proof cover 1, and gas shock waves easily burst the explosion-proof cover 1 to protect the main ventilator. When the explosion-proof cover 1 is opened, the shock wave is released, the acting force of the shock wave is attenuated, and when the acting force of the shock wave is balanced with the gravity of the explosion-proof cover 1, the explosion-proof cover 1 does not rise any more. When the explosion-proof cover 1 rises to a certain height, the lower counter weight hammer 42 lands, the gravity of the explosion-proof cover 1 of the upper counter weight hammer 41 is increased, the resistance acting on the shock wave is increased, and the explosion-proof cover 1 does not rise any more. Thus, the rising height of the explosion-proof cover 1 can be controlled within a certain range, and the problem that the whole weight 4 completely lands to cause the pull rope 3 to lose the gravity and break away from the fixed pulley 22 to cause failure can be avoided.

In this embodiment, the utility model discloses colliery return air vertical automatic re-setting explosion-proof equipment still includes counter-wind locking device, and counter-wind locking device detains 5 and control division including locking, and 5 equipartitions are detained in explosion-proof lid 1 periphery department to eight locks, and locking is detained 5 and is included lockpin 51, mount pad 52, flexible driving piece 53 and protection casing 54. The mounting seat 52 is used for fixing at the position of the outer periphery of the well, the locking pin 51 is arranged on the mounting seat 52 in a sliding manner along the radial direction of the explosion-proof cover 1, and the telescopic driving piece 53 is arranged on the mounting seat 52 and is connected with the locking pin 51 at the driving end thereof so as to drive the locking pin 51 to lock or separate from the explosion-proof cover 1. The control unit controls the telescopic operation of the telescopic driver 53. The shield 54 covers the telescopic driving member 53 and is fixed to the mounting base 52. The telescopic driving member 53 may be an air cylinder, an oil cylinder or a push rod motor.

When the main ventilator normally works, the control part controls the telescopic driving piece 53 to retract, the lock pin 51 is separated from the explosion-proof cover 1, and the explosion-proof cover 1 can be opened under the action of external force; when the main ventilation machine is against the wind, the control part controls the telescopic driving piece 53 to extend out, the lock pin 51 tightly locks the explosion-proof cover 1, the explosion-proof cover 1 cannot be opened, the explosion-proof cover 1 is automatically locked during the wind reversal, the safety risk is greatly reduced, the operation cost of a coal mine is reduced, and the workload of operators on duty is reduced. When the main ventilator is used for reversing air, the main ventilator presses air into the mine, and the air pressure in the mine is higher than that outside the mine; if the explosion-proof cover 1 is not locked, the explosion-proof cover 1 pushes the explosion-proof cover 1 open under the action of the air pressure in the mine, and a back-wind short circuit is caused.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying importance; the words "bottom" and "top", "inner" and "outer" refer to directions toward and away from, respectively, a particular component geometry.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "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; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above description is only for the preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. The utility model provides a colliery return air shaft automatic re-setting explosion-proof equipment, a serial communication port, including explosion-proof cover (1), guiding mechanism (2), stay cord (3) and counterweight (4), at least two sets of guiding mechanism (2) encircle explosion-proof cover (1) periphery evenly distributed, every guiding mechanism (2) of group include support (21), fixed pulley (22), perpendicular guide (23), sliding part (24) and buffering subassembly (25), support (21) and perpendicular guide (23) are all found colliery return air shaft peripheral position immediately, sliding part (24) slide and set up on perpendicular guide (23), buffering subassembly (25) are installed on perpendicular guide (23) and interval arrangement in sliding part (24) top, two fixed pulley (22) rotationally install on support (21), every guiding mechanism (2) of group correspond and set up a stay cord (3) and a stay cord piece (4), every stay cord (3) are around locating on corresponding fixed pulley (22), every stay cord (3) one end is connected on explosion-proof cover (1), its other end connects on counterweight (4).

2. The automatic resetting and explosion-proof device for the coal mine air return vertical shaft is characterized in that the explosion-proof cover (1) comprises an upper cone (11) and a lower cone (12), and the bottom surface of the upper cone (11) is attached to and fixedly connected with the bottom surface of the lower cone (12).

3. The automatic reset explosion-proof device for the coal mine air return vertical shaft is characterized in that a guide rail with a guide groove is adopted as the vertical guide piece (23), the sliding part (24) comprises a connecting piece (241) fixed at the periphery of the upper surface of the explosion-proof cover (1) and a guide wheel (242) rotatably arranged on the connecting piece (241), and the guide wheel (242) can be arranged in the guide groove of the guide rail in a rolling way.

4. The automatic resetting explosion-proof device for the coal mine air return vertical shaft is characterized in that the weight part (4) comprises an upper weight hammer (41), a lower weight hammer (42) and a connecting rope (43) connected between the upper weight hammer (41) and the lower weight hammer (42), and the upper weight hammer (41) is connected to one end of the pull rope (3).

5. The automatic resetting and explosion-proof device for the coal mine air return vertical shaft is characterized by further comprising a counter-wind locking device, wherein the counter-wind locking device comprises locking buckles (5) and a control part, the locking buckles (5) are uniformly distributed on the periphery of the explosion-proof cover (1), each locking buckle (5) comprises a lock pin (51), a mounting seat (52) and a telescopic driving part (53), the lock pins (51) can be radially and slidably mounted on the mounting seats (52) along the explosion-proof cover (1), the telescopic driving parts (53) are mounted on the mounting seats (52) and the driving ends of the telescopic driving parts are connected with the lock pins (51) to drive the lock pins (51) to be locked or separated from the explosion-proof cover (1), and the control part is used for controlling the telescopic action of the telescopic driving parts (53).

6. The automatic resetting explosion-proof device for the coal mine air return vertical shaft is characterized in that the locking buckle (5) comprises a protective cover (54), and the protective cover (54) is covered on the telescopic driving piece (53) and is fixed on the mounting seat (52).

7. The automatic return explosion protection device for coal mine return air vertical shafts according to claim 1, wherein the buffer assembly (25) comprises an elastic member (251) sleeved on the vertical guide member (23).

8. The automatic reset explosion-proof device of the coal mine return air vertical shaft is characterized in that the buffer assembly (25) further comprises a fixing block (252) fixed on the vertical guide element (23), and the upper end of the elastic element (251) is fixed on the fixing block (252).

9. The automatic reset explosion protection device of a coal mine return air shaft as claimed in claim 8, wherein the buffer assembly (25) further comprises a contact plate (253) connected to the lower end of the elastic member (251).

10. The automatic resetting explosion-proof device for coal mine air return vertical shafts as claimed in claim 1, characterized in that the pull rope (3) is a steel wire rope.

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