Underground explosion-proof dust-falling device

Abstract

The invention relates to the field of mine explosion suppression and suppression devices, in particular to an underground explosion suppression and dust suppression device. The device comprises a horizontally arranged linkage shaft, at least one explosion-proof assembly used for spraying carbon dioxide gas and a trigger assembly capable of synchronously driving the at least one explosion-proof assembly to spray the carbon dioxide gas when being impacted by explosive shock waves, wherein the at least one explosion-proof assembly and the trigger assembly are linearly and sequentially arranged in the length direction of the linkage shaft; the trigger assembly is located at a roadway opening or an intersection, and the at least one explosion-proof assembly is located in a roadway; the explosion-proof assembly comprises a carbon dioxide gas cylinder, the carbon dioxide gas cylinder comprises a steel cylinder main valve and a gas outlet, the steel cylinder main valve is fixedly connected with a main valve driving part, a vertical shaft is fixedly installed at the top of the main valve driving part, and the vertical shaft is in transmission connection with the linkage shaft through a first turning transmission part. The device is good in explosion suppression effect and has a certain dust falling effect.

Description

Technical Field

[0001] The invention relates to the field of mine explosion-proof and explosion-suppression devices, and in particular to an underground explosion-proof and dust-reduction device. Background Art

[0002] In the process of coal mining, coal mines are accompanied by a variety of disasters and accidents, such as gas explosions, coal dust explosions, etc. Among these accidents, gas explosions are undoubtedly the most serious. Not only do they cause the greatest losses, but they also occur the most frequently. About 70% of the major accidents with more than 20 deaths are caused by gas explosions. Therefore, it is very necessary to take technical measures to control gas explosion accidents.

[0003] The technical measures to control gas explosion accidents include preventive measures and explosion-proof measures. Explosion-proof measures rely on pre-installed mine explosion-proof and explosion-suppression devices (hereinafter referred to as explosion-proof devices) to prevent the spread of explosions and limit the spread of flames after a gas explosion occurs. This is the last barrier to control gas explosions.

[0004] The initially commonly used explosion-proof and explosion-suppression device in mines was the passive explosion-proof shed, which includes explosion-proof rock powder shed, explosion-proof water trough shed and explosion-proof water bag shed. The explosion-proof water bag shed is the most widely used. It has strong adaptability and is easy to install, disassemble and move. It relies on the explosion shock wave to overturn the water bag on the roof and pour water into the tunnel to block the spread of gas explosions. However, non-atomized water is not easy to form a dense explosion-proof isolation area (also called a partition area), and the water's air time from overturning to landing is very short and uneven, so it is easy to miss the flame wave after the explosion shock wave. The explosion-proof effect is average. Therefore, people began to use automatic explosion suppression devices. The automatic explosion suppression device detects the explosion shock wave when the explosion occurs, and promptly sprays the pre-placed water, rock powder, N2, CO2, etc. into the tunnel, thereby achieving the purpose of suppressing the spread of the explosion flame. The commonly used device is a suspended dry powder spraying device on the top of the tunnel. The suspended dry powder spraying device opens the compressed air valve in the device through the impact force of the explosion shock wave. The high-pressure gas quickly blows the dry powder out of the nozzle and disperses it in the tunnel to form a dense explosion-proof isolation area to prevent the spread of the flame wave and achieve the purpose of explosion isolation. However, the sensing element and dry powder storage container of the suspended dry powder spraying device are integrated, and the interval between the explosion shock wave and the flame wave is short. When the flame wave has reached this position, the dry powder is still sprayed to form the explosion-proof isolation area, which makes the formation of the explosion-proof isolation area have a certain hysteresis. A large part of the flame wave will not be offset, and the dry powder may be entrained and taken away from the explosion-proof isolation area, which ultimately makes the explosion-proof effect poor.

[0005] Therefore, the existing explosion-proof device has the problem of poor explosion-proof effect. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide an underground explosion-proof and dust-reducing device with good explosion-proof effect and certain dust-reducing effect.

[0007] In order to solve the above technical problems, the present invention provides an underground explosion-proof dust suppression device, comprising a horizontally arranged linkage shaft and at least one explosion-proof component for spraying carbon dioxide gas arranged in sequence in a straight line along the length direction of the linkage shaft, and a trigger component capable of synchronously driving at least one explosion-proof component to spray carbon dioxide gas when impacted by an explosion shock wave; the trigger component is located at a tunnel entrance or intersection, at least one explosion-proof component is located in the tunnel, at least one explosion-proof component is installed on the tunnel ground, and the trigger component is installed on the tunnel wall; the explosion-proof component comprises a carbon dioxide cylinder, the carbon dioxide cylinder comprises a cylinder main valve and an air outlet, the cylinder main valve is fixedly connected to a main valve driving member, a vertically arranged vertical shaft is fixedly installed on the top of the main valve driving member, and the vertical shaft is transmission-connected to the linkage shaft through a first direction-changing transmission member; the trigger component comprises a fan component capable of rotating when impacted by an explosion shock wave, the fan component comprises a vertically arranged fan shaft, and the bottom end of the fan shaft is transmission-connected to a horizontally arranged linkage shaft through a second direction-changing transmission member.

[0008] As a further improvement of the present invention: at least one explosion-proof assembly is installed on the tunnel floor through a base, and the base includes a bottom plate and a cylinder vertically installed on the top of the bottom plate and capable of being clamped with the bottom of the carbon dioxide cylinder.

[0009] As a further improvement of the present invention: the trigger assembly is installed on the tunnel wall through a triangular bracket.

[0010] As a further improvement of the present invention: the fan component includes a herringbone bracket fixedly mounted on the fan shaft, and each vertical end of the herringbone bracket is vertically mounted with an arc-shaped fan blade that can drive the herringbone bracket to rotate when impacted by an explosion shock wave.

[0011] Preferably, the arc-shaped fan blade comprises a vertical rod and three pairs of arc-shaped plates installed on the vertical rod from top to bottom.

[0012] As a further improvement of the present invention: the first direction-changing transmission member includes a first bevel gear fixedly sleeved on one end of the vertical shaft close to the linkage shaft, and a second bevel gear meshing with the first bevel gear is fixedly sleeved on the linkage shaft.

[0013] As a further improvement of the present invention: the second direction-changing transmission member includes a third bevel gear fixedly sleeved on one end of the fan shaft close to the linkage shaft, and a fourth bevel gear meshing with the third bevel gear is fixedly sleeved on the linkage shaft.

[0014] As a further improvement of the present invention: a gas diverter capable of spraying gas in multiple directions is installed on the gas outlet of the carbon dioxide gas cylinder.

[0015] As a further improvement of the present invention: the main valve driving member includes a driving block fixedly installed on the main valve of the cylinder and a Z-shaped block vertically installed on the top of the driving block; the vertical axis is installed on the top of the Z-shaped block.

[0016] The beneficial effects of the present invention are as follows: the underground explosion-proof and dust-reduction device provided by the present invention has good explosion-proof effect and a certain dust-reduction effect.

[0017] The trigger component of the device is located at the entrance of the tunnel or the intersection, at least one explosion-proof component is located in the tunnel, and the trigger component is set at a position close to the entrance of the tunnel or at the intersection of the intersecting tunnels. The trigger component can be triggered before the explosion shock wave reaches the location of the explosion-proof component, and drive the explosion-proof component to release carbon dioxide gas in the tunnel in advance before the flame wave arrives, and quickly form an explosion-proof isolation area in the tunnel. Therefore, an explosion-proof isolation area will be formed in the tunnel before the flame wave arrives, and the formation of the explosion-proof isolation area no longer lags behind the arrival of the flame wave. Therefore, the already formed explosion-proof isolation area can offset most of the flame wave, cut off the energy supply of the explosion shock wave, extinguish the flame wave flame, eliminate the chain reaction of the gas explosion, and greatly improve the explosion-proof effect.

[0018] At the same time, the liquid carbon dioxide in the carbon dioxide cylinder is sprayed out in the form of gas. During the rapid gasification process, the temperature in the tunnel will reach below freezing point, and the moisture in the humid air underground will quickly condense into fine water mist. The fine water mist can further enhance the explosion-proof effect with the explosion-proof isolation area, and the fine water mist in the air can also quickly settle the explosion smoke in the tunnel, which has a certain dust reduction effect. The device is a purely mechanical structure with a simple structure, suitable for mass production and large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the positional relationship between the explosion-proof assembly and the linkage shaft and other components of the present invention;

[0021] Figure 3 A schematic diagram showing the positional relationship between the flameproof assembly and the linkage shaft and other components in the present invention from another angle;

[0022] Figure 4 It is a schematic diagram of the positional relationship between the trigger assembly and the linkage shaft and other components in the present invention;

[0023] Figure 5 A defense scenario in which a device provided by the present invention is arranged in a small-section laneway;

[0024] Figure 6 A defense scenario in which two devices provided by the present invention are arranged in a large-section tunnel;

[0025] Figure 7 It is the overall structural schematic diagram of the cross tunnel;

[0026] Figure 8 It is a defense scene of the main lane of the cross lane;

[0027] Fig. 9 Fortification scenario of large cross-section tunnels for cross-tunnels;

[0028] The names of the components corresponding to the marks in the above drawings are: 1. linkage shaft;

[0029] 2. Flameproof assembly; 201. Carbon dioxide cylinder; 202. Main valve driver; 203. Vertical axis; 204. Gas diverter;

[0030] 3. trigger assembly; 301. fan assembly;

[0031] 4A, first direction-changing transmission member; 4B, second direction-changing transmission member;

[0032] 5. Base; 6. Triangular bracket. DETAILED DESCRIPTION

[0033] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0034] like Figure 1 As shown, an underground explosion-proof dust suppression device provided by the present invention comprises a horizontally arranged linkage shaft 1 and at least one explosion-proof component 2 for spraying carbon dioxide gas arranged in a straight line in sequence along the length direction of the linkage shaft 1, and a trigger component 3 that can synchronously drive at least one explosion-proof component 2 to spray carbon dioxide gas when impacted by an explosion shock wave. The trigger component 3 is located at the entrance of the tunnel or the intersection, and can be triggered by the explosion shock wave coming from all directions, driving the explosion-proof component 2 to make an isolation action in advance to ensure the safety of the tunnel. At least one explosion-proof component 2 is located in the tunnel. There is a distance difference between the trigger component 3 and the explosion-proof component 2, and the distance difference is determined according to actual needs. The carbon dioxide gas sprayed is a high-pressure gas of 6 to 8 MPa.

[0035] like Figure 1 , Figure 2 , Figure 3As shown, the explosion-proof assembly 2 includes a carbon dioxide cylinder 201, also known as a carbon dioxide cylinder. The carbon dioxide cylinder 201 includes a cylinder main valve and an air outlet, the cylinder main valve is fixedly connected to the main valve driving member 202, a vertical shaft 203 is fixedly installed on the top of the main valve driving member 202, and the main valve driving member 202 includes a driving block fixedly installed on the cylinder main valve and a Z-shaped block vertically installed on the top of the driving block; the vertical shaft is installed on the top of the Z-shaped block. The vertical shaft 203 is connected to the linkage shaft 1 through a first direction-changing transmission member 4A; the vertical shaft 203 is perpendicular to the linkage shaft 1. The first direction-changing transmission member 4A includes a first bevel gear fixedly sleeved on one end of the vertical shaft 203 close to the linkage shaft 1, and a second bevel gear meshing with the first bevel gear is fixedly sleeved on the linkage shaft 1. The first direction-changing transmission member 4A also includes a first housing for protecting the first bevel gear and the second bevel gear, and the first housing is installed on the tunnel wall through a triangular bracket 6. A gas diverter 204 is installed on the gas outlet of the carbon dioxide gas cylinder 201 so as to allow the gas to be ejected in multiple directions.

[0036] like Figure 1 , Figure 4 As shown, the trigger assembly 3 includes a fan member 301 that can rotate when impacted by an explosion shock wave, and the fan member 301 includes a vertically arranged fan shaft, a shaft sleeve is arranged outside the fan shaft, and the bottom of the shaft sleeve is installed on the top of the second shell. The bottom end of the fan shaft is connected to the horizontally arranged linkage shaft 1 through a second direction-changing transmission member 4B. The fan member 301 includes a herringbone bracket fixedly mounted on the fan shaft, and each vertical end of the herringbone bracket is vertically mounted with an arc-shaped fan blade that can drive the herringbone bracket to rotate when impacted by an explosion shock wave. The arc-shaped fan blade includes a vertical rod and two arc-shaped plates installed on the vertical rod from top to bottom. The fan shaft is perpendicular to the linkage shaft 1. The second direction-changing transmission member 4B includes a third bevel gear fixedly sleeved on one end of the fan shaft close to the linkage shaft 1, and a fourth bevel gear meshing with the third bevel gear is fixedly sleeved on the linkage shaft 1. The second direction-changing transmission member 4B also includes a second shell for protecting the third bevel gear and the fourth bevel gear.

[0037] like Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9As shown, at least one explosion-proof assembly 2 is installed on the tunnel floor, and the trigger assembly 3 is installed on the tunnel wall; at least one explosion-proof assembly 2 is installed on the tunnel floor through a base 5, and the base 5 includes a bottom plate and a cylinder vertically installed on the top of the bottom plate and can be clamped with the bottom of the carbon dioxide gas cylinder 201. The edge of the bottom plate is provided with a plurality of screw holes around its central axis, and the bottom plate is installed on the tunnel floor through the cooperation of the screw holes and expansion bolts. The trigger assembly 3 is installed on the tunnel wall through a triangular bracket 6, and a plurality of screw holes are provided on the side of the triangular bracket 6 close to the tunnel wall, and the triangular bracket 6 is installed on the tunnel wall through the cooperation of the screw holes and expansion bolts. If the tunnel is a cross tunnel, the trigger assembly 3 is usually installed at the intersection of the small-section tunnel and the main tunnel or at the intersection of the large-section tunnel and the main tunnel.

[0038] The working principle of the present invention is as follows: when an explosion occurs, the explosion shock wave will first contact the trigger assembly 3 located at the entrance of the tunnel or the intersection, and the explosion shock wave will push the three arc-shaped fan blades at a very fast speed. The concave structure and the circular arrangement of the three arc-shaped fan blades can convert the shock wave airflow coming from any direction into the three arc-shaped fan blades to drive the herringbone bracket to rotate in a directional manner, the herringbone bracket drives the fan shaft to rotate in a directional manner, the fan shaft drives the third bevel gear to rotate, the third bevel gear drives the fourth bevel gear to rotate, the fourth bevel gear drives the linkage shaft 1 to rotate, and the linkage shaft 1 drives the three second bevel gears thereon to rotate. The bevel gear rotates, and the three second bevel gears respectively drive the first bevel gears meshing therewith to rotate, and the first bevel gear rotates through the vertical shaft 203, and the vertical shaft 203 drives the main valve driving member 202 to rotate, so that the main valve of the cylinder is opened, and the carbon dioxide gas is ejected from the gas outlet through the gas diverter 204 in multiple directions, and the liquid carbon dioxide in the carbon dioxide cylinder 201 is rapidly released within 2 to 3 seconds, and a dense carbon dioxide explosion-proof isolation area is quickly formed in the defense tunnel. When the subsequent flame wave arrives from the direction of the explosion shock wave, it is counteracted to play the role of explosion isolation and fire extinguishing. At the same time, due to the rapid gasification of liquid carbon dioxide, the carbon dioxide gasification absorbs heat and quickly reduces the temperature of the explosion-proof isolation area to below the freezing point, and quickly condenses the moisture in the humid air underground to form a dense water mist. The dense carbon dioxide explosion-proof isolation area and the dense water mist can quickly block the gas combustion reaction in the flame wave, cut off the energy supply of the explosion shock wave, and eliminate the chain reaction of the gas explosion. The fine water mist in the air can also quickly settle the explosion smoke and dust in the tunnel. In addition to achieving the effects of explosion isolation and fire extinguishing, it also has a certain dust reduction effect.

[0039] It should be noted that the present invention is not limited to the specific structures shown in the drawings in the above-mentioned embodiments, and various changes can be made thereto within the knowledge scope of ordinary technicians in this field.

Claims

1. An underground explosion-proof dust suppression device, characterized in that: It comprises a horizontally arranged linkage shaft (1), at least one flameproof component (2) for spraying carbon dioxide gas which is arranged in sequence in a straight line along the length direction of the linkage shaft (1), and a trigger component (3) which can synchronously drive at least one flameproof component (2) to spray carbon dioxide gas when impacted by an explosion shock wave; The trigger assembly (3) is located at the entrance or intersection of the tunnel, at least one of the flameproof assemblies (2) is located in the tunnel, at least one of the flameproof assemblies (2) is installed on the tunnel floor, and the trigger assembly (3) is installed on the tunnel wall; The flameproof assembly (2) comprises a carbon dioxide gas cylinder (201), the carbon dioxide gas cylinder (201) comprises a cylinder main valve and an air outlet, the cylinder main valve is fixedly connected to a main valve driving member (202), a vertical shaft (203) is fixedly installed on the top of the main valve driving member (202), and the vertical shaft (203) is transmission-connected to the linkage shaft (1) via a first direction-changing transmission member (4A); The trigger assembly (3) comprises a fan member (301) capable of rotating when impacted by an explosion shock wave, the fan member (301) comprising a vertically arranged fan shaft, the bottom end of the fan shaft being transmission-connected to the horizontally arranged linkage shaft (1) via a second direction-changing transmission member (4B).

2. The underground explosion-proof dust suppression device according to claim 1, characterized in that: At least one of the flameproof components (2) is installed on the tunnel floor via a base (5), wherein the base (5) comprises a bottom plate and a cylinder vertically installed on the top of the bottom plate and capable of being clamped with the bottom of the carbon dioxide cylinder (201).

3. The underground explosion-proof dust suppression device according to claim 1, characterized in that: The trigger assembly (3) is installed on the tunnel wall via a triangular bracket (6).

4. An underground explosion-proof dust suppression device according to any one of claims 1 to 3, characterized in that: The fan component (301) comprises a herringbone bracket fixedly mounted on the fan shaft, and each vertical end of the herringbone bracket is vertically mounted with an arc-shaped fan blade capable of driving the herringbone bracket to rotate when impacted by an explosion shock wave.

5. The underground explosion-proof dust suppression device according to claim 4, characterized in that: The arc-shaped fan blade comprises a vertical rod and three pairs of arc-shaped plates installed on the vertical rod from top to bottom.

6. An underground explosion-proof dust suppression device according to any one of claims 1 to 3, characterized in that: The first direction-changing transmission member (4A) comprises a first bevel gear fixedly sleeved on one end of the vertical shaft (203) close to the linkage shaft (1), and a second bevel gear meshing with the first bevel gear fixedly sleeved on the linkage shaft (1).

7. An underground explosion-proof dust suppression device according to any one of claims 1 to 3, characterized in that: The second direction-changing transmission member (4B) comprises a third bevel gear fixedly sleeved on one end of the fan shaft close to the linkage shaft (1); a fourth bevel gear meshing with the third bevel gear is fixedly sleeved on the linkage shaft (1).

8. An underground explosion-proof dust suppression device according to any one of claims 1 to 3, characterized in that: The gas outlet of the carbon dioxide gas cylinder (201) is provided with a gas diverter (204) capable of causing the gas to be ejected in multiple directions.

9. An underground explosion-proof dust suppression device according to any one of claims 1 to 3, characterized in that: The main valve driving member (202) comprises a driving block fixedly mounted on the main valve of the cylinder and a Z-shaped block vertically mounted on the top of the driving block; The vertical shaft is mounted on the top of the Z-shaped block.

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