An active explosion-proof and CO synchronous elimination system for underground coal mines

Abstract

The present invention discloses an active explosion-proof and CO synchronous elimination system for underground coal mines, including a flame sensor, a linkage controller, a mine-use explosion-proof and intrinsically safe power supply, and active explosion-proof and CO synchronous elimination equipment. The active explosion-proof and CO synchronous elimination equipment includes a power injection device, a connecting device, a partitioned powder storage tank, and a mixing chamber. The power injection device is provided with a mine-use intrinsically safe normally closed solenoid valve, and the normally closed solenoid valve and the flame sensor are respectively connected to the linkage controller through a signal line. When an explosion accident occurs, the flame sensor arranged in the tunnel can quickly collect the explosion signal and transmit it to the linkage controller, and the linkage controller immediately controls the active explosion-proof and CO synchronous elimination equipment of the entire protection area to start simultaneously through an electrical signal, quickly mixes the explosion suppressant and the CO eliminater, and sprays them into the tunnel to form a powder cloud curtain, quickly extinguishes the explosion flame and eliminates the high concentration of CO generated by the explosion, and maximizes the life safety of the people involved in the accident.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine safety, in particular to an active explosion-proof and CO synchronous elimination system in an underground coal mine. Background Art

[0002] Gas explosion accidents are one of the most destructive accidents in coal mines. They instantly form high-temperature, high-speed flames and a large amount of toxic gaseous products in the underground tunnel network, and cause impact damage or even failure to tunnel support structures, mine ventilation networks and other facilities, seriously threatening the lives of workers. With the increase in the depth of coal mining, the prevention and control of gas explosion disasters faces severe challenges.

[0003] The harm caused by coal mine gas explosion to human body mainly includes high temperature burning of explosion flame, overpressure damage of explosion shock wave and poisoning of toxic and harmful gases, among which CO poisoning is particularly prominent. Statistics show that more than 80% of the victims of coal mine gas explosion accidents are caused by CO poisoning.

[0004] Explosion isolation and suppression technology and equipment play an obvious role in controlling the scale of gas explosion accidents. However, the explosion suppression effect has an incentive effect on the production of CO toxic gas in gas explosions. The thermal decomposition of carbon-containing explosion suppressants themselves will also produce a large amount of CO toxic gas, resulting in a sharp increase in CO concentration after the explosion. While the existing technical equipment has the function of suppressing or isolating the spread of gas and coal dust explosions, it does not take any technical means to deal with the toxic and harmful gases produced after the explosion. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the above technical defects and provide an active explosion-proof and CO synchronous elimination system for underground coal mines.

[0006] In order to solve the above problems, the technical solution of the present invention is as follows: comprising a CO synchronous elimination explosion suppression device, a flame sensor, a linkage controller and a flameproof and intrinsically safe DC power supply, wherein the flame sensor is electrically connected to the linkage controller and the CO synchronous elimination explosion suppression device respectively, and the linkage controller is electrically connected to the flameproof and intrinsically safe DC power supply;

[0007] The CO synchronous elimination explosion suppression device includes a power injection device, a connecting device, a partitioned powder storage chamber and a mixing chamber. The front side of the power injection device is provided with a connecting device, the front side of the connecting device is provided with a truncated cone-shaped shell, one side of the interior of the truncated cone-shaped shell is provided with a partitioned powder storage chamber, and the other side is provided with a mixing chamber.

[0008] Furthermore, the connecting device includes a deflector, flange 1, a truncated cone-shaped shell, flange 2 and flange 3, one end of the truncated cone-shaped shell is fixedly connected to flange 2, and the other end is fixedly connected to flange 3, the rear end of flange 2 is provided with flange 1, and the rear end of flange 1 is provided with a deflector.

[0009] Furthermore, the partitioned powder storage chamber is symmetrically divided by a steel plate along an axis, the front end of the steel plate and the rear end of the truncated cone-shaped shell are fixedly connected to an inlet flange, and the inlet flange is fixedly connected to the steel plate.

[0010] Furthermore, one end of the spring is fixedly connected to the mixing plug, and the other end is fixedly connected to the diffusion cover. The periphery of the mixing plug is provided with a plurality of equidistant screw holes.

[0011] Furthermore, the power injection device includes a pneumatic ball valve, an indicating pressure gauge, a nitrogen cylinder valve, a nitrogen cylinder, a fixed chuck, a shell, a driving gas cylinder, an inflation port and a closed solenoid valve. A plurality of equidistant fixed chucks are provided on the rear side of the interior of the shell, a nitrogen cylinder is passed through one side of the interior of the plurality of fixed chucks, and a driving gas cylinder is passed through the other side. A nitrogen cylinder valve is provided at the front end of the nitrogen cylinder, an indicating pressure gauge is provided at the top of the front side of the nitrogen cylinder valve, an inflation port is provided at the bottom of the front side of the nitrogen cylinder valve, the front end of the nitrogen cylinder valve is connected to the rear bottom of the pneumatic ball valve through a connecting pipe, the front end of the driving gas cylinder is provided with a closed solenoid valve, and the front end of the closed solenoid valve is connected to one side of the pneumatic ball valve through a connecting pipe.

[0012] Furthermore, one end of the deflector cover is fixedly connected to the pneumatic ball valve, and the other end is fixedly connected to flange 1, the flange 1 is fixedly connected to the shell, and the flange 1 is connected to flange 2 by bolts.

[0013] Furthermore, a limiting rod is provided inside the mixing chamber, the rear portion of the limiting rod is sleeved with a mixing plug, the front end of the limiting rod is fixedly connected to a diffusion cover, the end of the limiting rod is fixedly connected to a steel plate, and the outer wall of the limiting rod is sleeved with a spring.

[0014] The advantages of the present invention compared with the prior art are:

[0015] 1. The present invention provides an active explosion-proof and CO synchronous elimination system for underground coal mines, which can quickly identify explosion flame information, and can quickly link and trigger each CO synchronous elimination explosion suppression unit in the protection area to quickly mix the explosion suppressant and the CO eliminater and spray them into the tunnel to suppress or isolate the spread of gas and coal dust explosions and eliminate a large amount of CO generated after the explosion. The system has the advantages of rapid response, reliable explosion suppression, and effective reduction of toxic and harmful gas concentrations. The explosion suppression unit adopts the explosion suppressant and the CO eliminater as the explosion suppression medium, has a rapid response and a long explosion suppression duration, and the CO synchronous elimination explosion suppression device is detachable and easy to clean after operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the CO synchronous elimination explosion suppression system of the present invention.

[0017] Figure 2It is a schematic diagram of the CO synchronous elimination explosion suppression device of the present invention.

[0018] Figure 3 It is a schematic diagram of the structure of the power injection device of the present invention.

[0019] Figure 4 It is a schematic diagram of the structure of the communication device of the present invention.

[0020] Figure 5 It is a schematic diagram of the structure of the separated powder storage chamber and the mixing chamber before the CO synchronous elimination explosion suppression device of the present invention is actuated.

[0021] Figure 6 It is a schematic diagram of the structure of the separated powder storage chamber and the mixing chamber after the CO synchronous elimination explosion suppression device of the present invention is actuated.

[0022] Figure 7 It is a structural diagram of the mixing plug in the mixing chamber of the present invention.

[0023] As shown in the figure: 1. CO synchronous elimination explosion suppression device; 2. Flame sensor; 3. Linkage controller; 4. Flameproof and intrinsically safe DC power supply; 11. Power injection device; 12. Connecting device; 13. Partitioned powder storage chamber; 14. Mixing chamber; 111. Pneumatic ball valve; 112. Indicating pressure gauge; 113. Nitrogen cylinder valve; 114. Nitrogen cylinder; 115. Fixed chuck; 116. Shell; 117. Drive cylinder; 118. Filling port; 119. Closed solenoid valve; 120. Flow guide cover; 121. Flange one; 122. Cone-shaped shell; 123. Flange two; 124. Flange three; 131. Steel plate; 132. Limit rod; 133. Mixing plug; 134. Spring; 135. Inlet flange; 136. Diffuser cover; 137. Cone-shaped shell. DETAILED DESCRIPTION

[0024] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] like Figures 1 to 5 As shown, this embodiment proposes an active explosion-proof and CO synchronous elimination system for underground coal mines, including a CO synchronous elimination explosion suppression device 1, a flame sensor 2, a linkage controller 3, and a flameproof and intrinsically safe DC power supply 4. The flame sensor 2 is respectively connected to the linkage controller 3 and the CO synchronous elimination explosion suppression device 1, the flameproof and intrinsically safe DC power supply 4 is connected to the linkage controller 3, the CO synchronous elimination explosion suppression device 1 is a post-explosion CO rapid elimination explosion suppression unit, and the flame sensor 2 is respectively connected to the linkage controller 3 and the nearest post-explosion CO rapid elimination explosion suppression unit.

[0028] Embodiment 2:

[0029] The scheme in Example 1 is further introduced below in combination with a specific working method, as described below: The CO synchronous elimination explosion suppression device 1 includes a power injection device 11, a connecting device 12, a partitioned powder storage chamber 13, and a mixing chamber 14. The power injection device 11 is provided with a closed electromagnetic valve 119, which connects the surrounding flame sensor 2 and the linkage controller 3. The power injection device 11 includes a nitrogen cylinder 114, a driving cylinder 117, a closed electromagnetic valve 119, a guide cover 120, a pneumatic ball valve 111 and a housing 116. The nitrogen cylinder 11 4 is connected to the pneumatic ball valve 111, and the driving gas cylinder 117 is connected to the closed electromagnetic valve 119 and the pneumatic ball valve 111 in sequence to control the opening of the pneumatic ball valve 111; the nitrogen cylinder 114, the driving gas cylinder 117, the closed electromagnetic valve 119, and the pneumatic ball valve 111 are all installed in the shell 116, the shell 116 and the guide cover 120 are respectively welded on the flange 121, and the nitrogen cylinder valve 113 has a charging port 118 and an indicating pressure gauge 112; a fixing chuck 115 is arranged in the shell 116 for fixing the nitrogen cylinder 114 and the driving gas cylinder 117.

[0030] Embodiment 3:

[0031] The scheme in Example 2 is further introduced below in combination with the specific working method, as described below: the connecting device 12 includes a truncated cone-shaped shell 122, a second flange 123 and a third flange 124, the guide cover 120 is welded to the truncated cone-shaped shell 122, the two ends of the truncated cone-shaped shell 122 are respectively welded with the second flange 123 and the third flange 124, and the diffusion cover 136 is arranged at the entrance of the separated powder storage chamber 13; the power injection device 11 and the connecting device 12 are connected through the flange 121 and the flange 2 123, the separated powder storage chamber 13 and the mixing chamber 14 are arranged in the truncated cone-shaped shell 137, and the separated powder storage chamber 13 is made of steel. The plate 131 is symmetrically divided along the axis, and screw holes are provided around the gap of the mixing plug 133 for arranging a plastic film to seal the explosion suppressant powder and the CO eliminator powder; the mixing chamber 14 includes a mixing plug 133, a spring 134, an inlet flange 135, a limiting rod 132 and a diffusion cover 136, the mixing plug 133 has a gap, and a diffusion cover 136 is provided at the powder outlet of the mixing chamber 14, and a threaded hole is provided at the edge of the gap; one end of the spring 134 is connected to the mixing plug 133, and the other end is fixed to the mixing chamber 14, the mixing plug 133 is inserted into the limiting rod 132, and can move along the limiting rod 132, and the diffusion cover 136 is welded to one end of the truncated cone-shaped shell 137.

[0032] Embodiment 4:

[0033] The scheme in Example 3 is further introduced below in combination with the specific working method, as described below for details: The CO synchronous elimination explosion suppression device (unit) is arranged at the entrance or branch point of the underground coal mine tunnel, the high explosion risk area, near the key equipment, etc. The separated powder storage chamber 13 is respectively filled with explosion suppressant and CO eliminater, and is sealed with bolts through the mixing plug 133 and the plastic film. When an explosion occurs, the flame sensor 2 automatically detects the explosion flame signal and converts it into an electrical signal. The electrical signal starts the nearest CO synchronous elimination explosion suppression device 1, and transmits the electrical signal to the linkage controller 3. The linkage controller 3 receives the electrical signal of the flame sensor, and after calculation and judgment, outputs a control signal to trigger all post-explosion CO in the protection area to be quickly eliminated. Explosion suppression unit; the closed solenoid valve 119 in the CO synchronous elimination explosion suppression device 1 opens after receiving the trigger signal of the flame sensor 2 or the linkage controller 3, driving the pressurized gas in the gas cylinder 117 to open the pneumatic ball valve 111, and the pneumatic ball valve 111 opens to release the high-pressure nitrogen in the nitrogen cylinder 114, and the high-pressure nitrogen enters the separated powder storage chamber 13 through the connecting device 12 and impacts the explosion suppressant and the CO eliminater. The mixing plug 133 moves along the limit rod 132 under the action of pressure, and reciprocates under the elastic force of the spring 134, thereby stirring the air pressure to make the explosion suppressant and the CO eliminater quickly and evenly mixed and sprayed into the tunnel, preventing the explosion shock wave and flame from further spreading to other parts of the tunnel, thereby protecting the equipment and personnel safety in other areas.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0036] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. An active explosion-proof and CO synchronous elimination system for underground coal mines, characterized by: The invention comprises a CO synchronous elimination explosion suppression device (1), a flame sensor (2), a linkage controller (3) and a flameproof and intrinsically safe DC power supply (4), wherein the flame sensor (2) is electrically connected to the linkage controller (3) and the CO synchronous elimination explosion suppression device (1), respectively, and the linkage controller (3) is electrically connected to the flameproof and intrinsically safe DC power supply (4); The CO synchronous elimination explosion suppression device (1) comprises a power injection device (11), a connecting device (12), a partitioned powder storage chamber (13) and a mixing chamber (14); the front side of the power injection device (11) is provided with a connecting device (12); the front side of the connecting device (12) is provided with a truncated cone-shaped shell (137); one side of the interior of the truncated cone-shaped shell (137) is provided with a partitioned powder storage chamber (13) and the other side is provided with a mixing chamber (14); The power injection device (11) comprises a pneumatic ball valve (111), an indicating pressure gauge (112), a nitrogen cylinder valve (113), a nitrogen cylinder (114), a fixed chuck (115), a housing (116), a driving gas cylinder (117), a charging port (118) and a closed electromagnetic valve (119). A plurality of equidistant fixed chucks (115) are arranged on the rear side of the housing (116). A nitrogen cylinder (114) is inserted into one side of the plurality of fixed chucks (115) and a driving gas cylinder (117) is inserted into the other side of the plurality of fixed chucks (115). A nitrogen cylinder valve (113) is provided at the front end of the gas cylinder (114), an indicating pressure gauge (112) is provided at the front top of the nitrogen cylinder valve (113), a charging port (118) is provided at the front bottom of the nitrogen cylinder valve (113), a front end of the nitrogen cylinder valve (113) is connected to the rear bottom of the pneumatic ball valve (111) through a connecting pipe, a closed electromagnetic valve (119) is provided at the front end of the driving gas cylinder (117), and a front end of the closed electromagnetic valve (119) is connected to one side of the pneumatic ball valve (111) through a connecting pipe; The connecting device (12) comprises a flow guide cover (120), a flange 1 (121), a truncated cone-shaped shell (122), a flange 2 (123) and a flange 3 (124); one end of the truncated cone-shaped shell (122) is fixedly connected to the flange 2 (123), and the other end is fixedly connected to the flange 3 (124); the rear end of the flange 2 (123) is provided with a flange 1 (121); and the rear end of the flange 1 (121) is provided with a flow guide cover (120); The connecting device (12) comprises a flow guide cover (120), a flange 1 (121), a truncated cone-shaped shell (122), a flange 2 (123) and a flange 3 (124); one end of the truncated cone-shaped shell (122) is fixedly connected to the flange 2 (123), and the other end is fixedly connected to the flange 3 (124); the rear end of the flange 2 (123) is provided with a flange 1 (121); and the rear end of the flange 1 (121) is provided with a flow guide cover (120); The partitioned powder storage chamber (13) is symmetrically partitioned along the axis by a steel plate (131), the front end of the steel plate (131) and the rear end of the truncated cone-shaped shell (137) are fixedly connected to an inlet flange (135), and the inlet flange (135) is fixedly connected to the steel plate (131); A limiting rod (132) is provided inside the mixing chamber (14); the rear portion of the limiting rod (132) is sleeved with a mixing plug (133); the front end of the limiting rod (132) is fixedly connected to a diffusion cover (136); the end of the limiting rod (132) is fixedly connected to a steel plate (131); and the outer wall of the limiting rod (132) is sleeved with a spring (134).

2. The active explosion-proof and CO synchronous elimination system for underground coal mines according to claim 1 is characterized in that: One end of the deflector (120) is fixedly connected to the pneumatic ball valve (111), and the other end is fixedly connected to flange one (121); flange one (121) is fixedly connected to the housing (116); and flange one (121) is connected to flange two (123) via bolts.

3. The active explosion-proof and CO synchronous elimination system for underground coal mines according to claim 1 is characterized by: One end of the spring (134) is fixedly connected to the mixing plug (133), and the other end is fixedly connected to the diffusion cover (136). The periphery of the mixing plug (133) is provided with a plurality of equidistant screw holes.

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