CN113107572A

CN113107572A - Elastic explosion-proof device capable of weakening mine explosion shock wave

Info

Publication number: CN113107572A
Application number: CN202110552521.8A
Authority: CN
Inventors: 谢雄刚; 罗香莹
Original assignee: Guizhou University
Current assignee: Guizhou University
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2021-07-13

Abstract

The invention discloses an elastic explosion-proof device capable of weakening mine explosion shock waves, belonging to the technical field of mine safety devices; it comprises a mine tunnel; a pair of air door plates are arranged on the mine roadway; a plurality of groups of buffer external members are also arranged on the air door plate; the buffering sleeve piece comprises an elastic pressure bearing device and a pressure bearing air bag; the elastic pressure bearing device and the pressure bearing air bag are arranged towards the inner side direction of the mine roadway; the invention can weaken the huge damage caused by the shock wave generated by gas explosion when the shock wave contacts the explosion-proof door, reduce the damage of the shock wave to the underground operation personnel and equipment facilities of the coal mine, and make a contribution to weakening the energy confrontation of the contact between the gas explosion shock wave and the explosion-proof door.

Description

Elastic explosion-proof device capable of weakening mine explosion shock wave

Technical Field

The invention relates to the technical field of mine safety devices, in particular to an elastic explosion-proof device capable of weakening mine explosion shock waves.

Background

The mine explosion accident seriously threatens the mine exploitation safety, and the mine explosion door plays an important role in the coal mine gas explosion accident. High-pressure shock waves generated by gas explosion in the underground coal mine seriously damage underground equipment and structures, injure underground operating personnel, and even push an air shaft explosion door open, so that the major loss of a mine is caused. The coal mine safety regulations stipulate that an explosion door must be installed on an air shaft provided with a fan. The explosion door of the air shaft of the coal mine is an important safety facility for protecting the main ventilator, and is an anti-explosion protection device for resisting shock waves generated by gas and coal dust explosion accidents occurring underground, keeping a ventilation system from being damaged by the explosion shock waves and effectively preventing the continuation of the explosion hazards. Under the condition of normal production of a mine, the explosion-proof door is in a closed state, and once a gas explosion accident happens underground, the explosion-proof door is opened to quickly release pressure so as to protect the ventilator.

In order to reduce the rigid confrontation of the explosion shock wave to the explosion door, a flexible buffering concept is introduced. The flexible material is arranged on the explosion door to absorb a part of shock wave energy when explosion happens at the bottom of the well, thereby achieving the purposes of reducing the severity of accidents and reducing the number of people in distress. Therefore, the shock wave energy generated during the gas explosion in the well is regarded as an unexpected energy, and the unexpected energy is artificially accelerated and attenuated to be within a safe threshold value during the propagation process as much as possible.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the explosion-proof door of the elastic device can be used for consuming and absorbing the energy of the shock wave generated by gas explosion, so that the huge damage caused by the contact of the shock wave generated by the gas explosion and the explosion-proof door can be weakened, the damage of the shock wave to workers and equipment facilities in a coal mine can be reduced, and the contribution can be made to weakening the energy confrontation of the contact between the gas explosion shock wave and the explosion-proof door.

In order to solve the problems, the invention provides the following technical scheme:

an elastic explosion-proof device capable of weakening mine explosion shock waves; it comprises a mine tunnel; a pair of air door plates are arranged on the mine roadway; a plurality of groups of buffer external members are also arranged on the air door plate; the buffering sleeve piece comprises an elastic pressure bearing device and a pressure bearing air bag; the elastic pressure bearing device and the pressure bearing air bag are arranged towards the inner side direction of the mine roadway.

Preferably, the elastic pressure bearing device comprises a bracket plate which is installed on the air door plate in an embedded manner; a plurality of telescopic sleeves are arranged at the end part of the support plate; a bearing plate is fixed at the other end of the sleeve; a pressure spring is also arranged between the pressure bearing plate and the support plate; the pressure spring is wound on the sleeve for setting.

Further, the number of the sleeves on each support plate is not less than three, and the sleeves are uniformly arranged on the support plates.

Furthermore, the bearing plate is of a detachable structure; an auxiliary connecting piece is also arranged between two adjacent pressure bearing plates on the single air door plate along the same horizontal direction; the stress intensity of the auxiliary connecting piece is not lower than the ultimate compression strength of a plurality of compression spring combinations on a single elastic pressure bearing device.

Preferably, the pressure-bearing air bag comprises a connecting plate; the connecting plate is detachably arranged on the bearing plate of the elastic pressure bearing device through a bolt assembly; a plurality of air bag groups are fixed on the other side of the connecting plate.

Furthermore, the air bag group is an air bag structure made of elastic plastic, and the total area size of the air bag group is equivalent to the size of the connecting plate; the air bag groups are arranged independently, and an elastic supporting piece is arranged in the inner cavity of each air bag group.

The invention has the beneficial effects that:

aiming at the situation that the shock wave generated by mine gas explosion is rapidly propagated to damage an explosion door and endanger the safety of underground operators, the invention further combines the principle of flexible buffering of the safety airbag, and through an elastic device which is arranged on the explosion door and has the characteristic of consuming and absorbing the outstanding energy for doing work, when the outstanding shock wave impacts the elastic device, the elastic device generates friction resistance, local resistance and flexible buffering, transfers and consumes part of outstanding energy, can artificially weaken the impact pressure of the outstanding shock wave on the explosion door, and accelerate the attenuation of the outstanding shock wave to a disaster-free level, thereby achieving the purposes of reducing the damage to coal mine operators and equipment facilities and avoiding the disaster of mine wind current.

Drawings

FIG. 1 is a schematic diagram of the apparatus of the present invention;

FIG. 2 is a schematic structural diagram of a buffering assembly according to the present embodiment;

FIG. 3 is a schematic view of the buffering assembly when being shocked;

FIG. 4 is a schematic three-dimensional structure of the pressure-bearing bladder of the present embodiment;

description of reference numerals: 1. mine tunnel, 2, air door plant, 3, buffering external member, 4, elasticity hold the depressor, 4A, mounting panel, 4B, sleeve pipe, 4C, bearing plate, 4D, pressure spring, 4E, auxiliary connection spare, 5, pressure-bearing gasbag, 5A, even board, 5B, gasbag group, 5C, elastic support spare.

Detailed Description

The invention will be further described with reference to the following drawings and specific embodiments:

example (b):

referring to fig. 1, the present embodiment provides an elastic explosion-proof device for attenuating mine blast shock waves; the mine comprises a mine roadway 1; a pair of air door plates 2 are arranged on the mine tunnel 1; a plurality of groups of buffer external members 3 are also arranged on the air door panel 2; the buffering suite 3 comprises an elastic pressure bearing device 4 and a pressure bearing air bag 5; the elastic pressure bearing device 4 and the pressure bearing air bag 5 are arranged towards the inner side direction of the mine roadway 1.

The elastic pressure bearing device 4 comprises a support plate 4A which is embedded on the air door plate 2; a plurality of telescopic sleeves 4B are arranged at the end part of the support plate 4A; a bearing plate 4C is fixed at the other end of the sleeve 4B; a pressure spring 4D is also arranged between the pressure bearing plate 4C and the support plate 4A; the compression spring 4D is wound around the sleeve 4B. The sleeve 4B is of a multi-section telescopic rod structure, and when the pressure spring 4D is in an unloaded state, the sleeve 4B is in a fully stretched state; the bearing plate 4C and the bracket plate 4A are propped open by the sleeve 4B and the pressure spring 4D.

The number of the sleeves 4B on each of the holder plates 4A is not less than three, and the sleeves 4B are uniformly mounted on the holder plates 4A. The evenly arranged sleeves 4B are beneficial to more evenly stress the support plate 4A, and the service life of the device is prolonged.

The bearing plate 4C is a detachable structure; an auxiliary connecting piece 4E is also arranged between two adjacent pressure bearing plates 4C on the single air door plate 2 along the same horizontal direction; the stress intensity of the auxiliary connecting piece 4E is not lower than the ultimate compression strength of the combination of the plurality of compression springs 4D on the single elastic pressure bearing device 4. Considering that the bearing plates are used as moving parts and have relatively low stability, the bearing plates are arranged to be detachable, and meanwhile, the stress balance between the adjacent bearing plates of the device can be improved by using the auxiliary connecting piece 4E, and the stability of the device is improved to a certain extent; the auxiliary connecting member 4E used in this embodiment is a connecting rod made of a rigid material, and it is understood that the auxiliary connecting member 4E may be replaced by a wire or other connecting means for a specific use environment.

The pressure-bearing air bag 5 comprises a connecting plate 5A; the connecting plate 5A is detachably arranged on the bearing plate 4C of the elastic pressure bearing device 4 through a bolt assembly; a plurality of air bag groups 5B are fixed on the other side of the connecting plate 5A. The air bag group 5B is an air bag structure made of elastic plastic, and the total area size of the air bag structure is equivalent to the size of the connecting plate 5A; the air bag masses 5B are arranged independently of each other, and an elastic support member 5C is further arranged in the inner cavity of each air bag mass 5B, and the elastic support member 5C used in the embodiment is a spring.

When accidents such as gas explosion and the like happen underground, shock waves generated by explosion can firstly contact the pressure-bearing air bag, the energy of the shock waves is absorbed through elastic deformation by the air bag group and the springs inside the air bag group, then the elastic pressure bearing device 4 is extruded, and the impact energy is further absorbed through the deformation of the plurality of pressure spring groups, so that the direct impact of the shock waves on the explosion door is reduced, and the damage caused by the shock waves is relieved.

Claims

1. An elastic explosion-proof device capable of weakening mine explosion shock waves comprises a mine roadway (1); a pair of air door plates (2) are arranged on the mine roadway (1); the method is characterized in that: a plurality of groups of buffer external members (3) are also arranged on the air door panel (2); the buffer kit (3) comprises an elastic pressure bearing device (4) and a pressure bearing air bag (5); the elastic pressure bearing device (4) and the pressure bearing air bag (5) are arranged towards the inner side direction of the mine roadway (1).

2. An elastomeric blast protected device for attenuating mine blast shock waves as set forth in claim 1, wherein: the elastic pressure bearing device (4) comprises a support plate (4A) which is installed on the air door plate (2) in an embedded mode; a plurality of telescopic sleeves (4B) are arranged at the end part of the support plate (4A); a bearing plate (4C) is fixed at the other end of the sleeve (4B); a pressure spring (4D) is also arranged between the bearing plate (4C) and the support plate (4A); the pressure spring (4D) is wound on the sleeve (4B) for arrangement.

3. An elastomeric blast protected device for attenuating mine blast shock waves as set forth in claim 2, wherein: the number of the sleeves (4B) on each support plate (4A) is not less than three, and the sleeves (4B) are uniformly arranged on the support plates (4A).

4. An elastomeric blast protected device for attenuating mine blast shock waves as set forth in claim 2, wherein: the bearing plate (4C) is of a detachable structure; an auxiliary connecting piece (4E) is also arranged between two adjacent pressure bearing plates (4C) on the single air door plate (2) along the same horizontal direction; the stress intensity of the auxiliary connecting piece (4E) is not lower than the ultimate compression strength of the combination of a plurality of compression springs (4D) on a single elastic pressure bearing device (4).

5. An elastomeric blast protected device for attenuating mine blast shock waves as set forth in claim 1, wherein: the pressure-bearing air bag (5) comprises a connecting plate (5A); the connecting plate (5A) is detachably arranged on a pressure bearing plate (4C) of the elastic pressure bearing device (4) through a bolt assembly; a plurality of air bag groups (5B) are fixed on the other side of the connecting plate (5A).

6. An elastomeric blast protected device for attenuating mine blast shock waves as set forth in claim 5, wherein: the air bag group (5B) is an air bag structure made of elastic plastic, and the total area size of the air bag group is equivalent to the size of the connecting plate (5A); the air bag groups (5B) are arranged independently, and an elastic supporting piece (5C) is arranged in the inner cavity of each air bag group (5B).