• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to the field of mine ventilation and discloses an experimental apparatus for the coal and gas eruption induced air flow turbulence of the mine shaft branch comprising: a straight pipe group of variable diameter and a straight pipe group of equal diameter, the air inlet ends of the straight pipe group with variable diameter and the same diameter straight pipe group are respectively connected to the air outlet end of the air inlet pipe, and wherein the air outlet ends of the variable diameter straight pipe group and the same diameter straight pipe group are connected to the air inlet end of the air outlet pipe group, respectively; a forked straight pipe of the same diameter, one end of which is connected to the straight pipe group of variable diameter and another end of which is connected to the straight pipe group of the same diameter; a breakout device connected to one of the variable-diameter straight pipe group and the same-diameter straight pipe group; a monitoring component disposed on the air inlet pipe, the air outlet pipe group, the straight pipe group of variable diameter, the bifurcated straight pipe of the same diameter, and the straight pipe group of the same diameter. The device can be used to investigate the influence of the outbreak of coal and gas on the occurrence of air flow turbulence in the shaft branch.
    公开号:BE1027561B1
    申请号:E20205569
    申请日:2020-08-13
    公开日:2021-04-02
    发明作者:Leilin Zhang；Biming Shi；Zhen Zhong；Yu Zhang
    申请人:Anhui Universitaet Der Wss Und Technologie；
    IPC主号:
    专利说明:

    Experimental Apparatus for Coal and Gas Eruption Induced Air Flow Turbulence of the Mine Shaft Branch Technical Field The present invention relates to the field of mine ventilation, and more particularly, to an experimental apparatus for the coal and gas eruption induced air flow turbulence of the mine shaft branch.
    State of the art The coal and gas eruptions are very destructive.
    During the excavation, high-pressure gas flow and broken coal powder (rock powder) are immediately sprayed from the coal wall onto the mining field or roadway space, which is extremely energetic, creating a destructive impacting breakout air flow; The impinging airflow can induce a reversal of the mine airflow and highly concentrated gas re-enters the air inlet tunnel, causing the gas in the air inlet tunnel to exceed the limit and cause secondary damage such as gas explosion, etc.
    The study of the air flow turbulence of the shaft branch induced by the coal and gas eruption has important theoretical and practical meanings for the rational design of the mine protection system, the reduction of the disaster spread area, the rescue after disasters and the ventilation during disasters, etc.
    In order to better study the influence of the coal and gas eruption on the occurrence of the air flow turbulence of the shaft branch, it is currently an urgent problem to be solved based on the mechanism that the coal and gas eruption induces the air flow turbulence of the shaft branch, a set of To develop analysis and experimentation equipment for the air flow turbulence of the mine shaft branch induced by the eruption of coal and gas.
    In order to solve the above technical problems, the present invention provides an experimental apparatus for the coal and gas eruption induced air flow turbulence of the mine shaft branch, with the experimental apparatus, the influence of the coal and gas eruption on the occurrence can be measured the turbulence of the air flow in the shaft branch can be investigated.
    In order to achieve the above object, the present invention employs the following technical solution: the present invention provides an experimental apparatus for the air flow turbulence of the mine shaft branch induced by the eruption of coal and gas, comprising: an air intake pipe for air intake; an air outlet pipe group for the
    Air outlet; a two-straight pipe system comprising a straight pipe group of variable diameter and a straight pipe group of equal diameter, wherein the air inlet ends of the straight pipe group of variable diameter and the straight pipe group of the same diameter are connected to the air outlet end of the air inlet pipe, and the air outlet ends of the straight The variable diameter pipe group and the straight pipe group of the same diameter are respectively connected to the air inlet end of the air outlet pipe group; a forked straight pipe of the same diameter, one end of which is connected to the straight pipe group of variable diameter and another end of which is connected to the straight pipe group of the same diameter; a breaking device for breaking coal and gas connected to one of the variable-diameter straight tube group and the same-diameter straight tube group; a monitoring component which is respectively arranged on the air inlet pipe, the air outlet pipe group, the straight pipe group of variable diameter, the bifurcated straight pipe of the same diameter and the straight pipe group of the same diameter, the monitoring component being a pressure monitoring device for monitoring the pressure, a wind speed monitoring device for monitoring the wind speed and a gas concentration monitor for monitoring the gas concentration; a data acquisition device, wherein the pressure monitoring device, the wind speed monitoring device and the gas concentration monitoring device are each in communication with the data acquisition device.
    A fan is preferably arranged at the air outlet end of the air outlet pipe group.
    Preferably, the air outlet pipe group comprises a fourth straight pipe and a fifth straight pipe, wherein an air inlet end of the fourth straight pipe is connected to the air outlet ends of the straight pipe group of variable diameter and the straight pipe group of the same diameter, and an air outlet end of the fourth straight pipe with an air inlet end of the fifth straight pipe, and wherein the fan is disposed at an air outlet end of the fifth straight pipe.
    Preferably, the experimental device for the air flow turbulence of the mine shaft branch induced by the eruption of coal and gas further comprises a first intermediate pipe and a second intermediate pipe, the air inlet end of the straight pipe group of variable diameter being connected to the air outlet end of the air inlet pipe through the first intermediate pipe, and wherein the air outlet end of the straight pipe group of the same diameter is connected to the air inlet end of the air outlet pipe group through the second intermediate pipe.
    Preferably, the variable diameter straight pipe group comprises a first straight pipe, a second straight pipe and a third straight pipe which are coaxially arranged and connected one after the other along the axis direction, on the first straight pipe, the second straight pipe and the third straight pipe each of the monitoring component is arranged, and wherein the diameter of the third straight pipe is the same as the diameter of the first straight pipe and the diameters of the two are not the same as the diameter of the second straight pipe, and with an end remote from the second straight pipe of the first straight pipe is connected to the air outlet end of the air inlet pipe through the first intermediate pipe, while an end of the third straight pipe remote from the second straight pipe is connected to the air inlet end of the air outlet pipe.
    Preferably, one end of the forked straight tube with the same diameter facing away from the straight tube group with the same diameter and the breakout device are each connected to the third straight tube.
    Preferably, the first intermediate pipe and the second intermediate pipe are each designed as a structure of the straight pipe, the first intermediate pipe and the second intermediate pipe each being aligned perpendicular to the straight pipe group with variable diameter and the straight pipe group with the same diameter.
    The straight tube group with the same diameter preferably comprises a plurality of sixth straight tubes which are arranged coaxially and connected one after the other along the axial direction, the monitoring component being arranged on each of the sixth straight tubes.
    Preferably, the forked straight tube is inclined with the same diameter. The pressure monitoring device is preferably a pressure sensor, the wind speed monitoring device is a wind speed sensor and the gas concentration monitoring device is a gas concentration sensor. Compared to the prior art, the present invention achieves the following advantages: the variable diameter straight tube group, the same diameter straight tube group, and the same diameter bifurcated straight tube in the coal and gas eruption induced air flow turbulence experimental apparatus of the mine shaft branch according to the present invention are divided into three different kinds of pipes. During the specific use process, the pressure monitoring device can monitor the propagation properties of the shock wave overpressure in the above three different kinds of pipes after the coal and gas eruption, the wind speed monitor can monitor the inversion of the chess branch airflow under the effect of the coal and gas eruption, the gas concentration monitor can countercurrently of gas in the above three different kinds of pipes after the coal and gas eruption, therefore, the experimental device can study the influence of the coal and gas eruption on the occurrence of the duct branch airflow turbulence. BRIEF DESCRIPTION OF THE DRAWING In order to explain the embodiments of the present invention or the technical solutions from the prior art more clearly, the figures to be used are briefly presented below in the explanation of the embodiment. Obviously, the figures shown below represent only some embodiments of the present invention. Those of ordinary skill in the art can obtain other figures based on the figures without having to do creative work.
    Fig. 1 shows a schematic structural view of an experimental apparatus for the coal and gas eruption induced air flow turbulence of the mine shaft branch in an embodiment of the present invention.
    FIG. 2 shows a schematic representation of the arrangement method of a pressure monitoring device, a wind speed monitoring device and a gas concentration monitoring device in an exemplary embodiment of the present invention.
    LIST OF REFERENCE NUMERALS 1 Air inlet pipe 2 Second right-angled elbow pipe 3 First straight pipe 4 Second straight pipe 5 Third straight pipe 6 Fourth straight pipe 7 Fifth straight pipe 8 Sixth straight pipe 9 First intermediate pipe 10 Second intermediate pipe 11 Monitoring component 12 Bifurcated straight pipe with the same diameter 13 Pressure monitoring device 14 Wind speed monitoring device 15 Gas concentration monitor 16 First right-angled three-way joint 17 Second right-angled three-way joint 18 Third right-angled three-way joint
    19 First right-angled elbow pipe 20 Breakout device 21 Fan 5 Detailed embodiments In connection with figures in the embodiment of the present invention, the technical solutions in the embodiment of the present invention are clearly and completely explained in the following.
    Obviously, the illustrated embodiments are not all embodiments, but only a part of embodiments of the present invention.
    All other embodiments obtained by those skilled in the art based on the embodiments in the present invention without creative work are to be regarded as being within the scope of the present invention.
    The present invention aims to provide an experimental apparatus for the mine shaft branch air flow turbulence induced by the coal and gas eruption which can study the influence of the coal and gas eruption on the occurrence of the shaft branch air flow turbulence.
    In the following, the present invention is explained in more detail in connection with figures and the detailed embodiments so that the above aim, the features and the advantages according to the present invention can be understood more clearly and easily.
    As shown in Fig. 1, the present embodiment provides an experimental apparatus for the coal and gas eruption induced air flow turbulence of the mine shaft branch, comprising: an air inlet pipe 1 for air inlet; an air outlet pipe group for air outlet; a two-straight pipe system comprising a straight pipe group of variable diameter and a straight pipe group of the same diameter, wherein the air inlet ends of the straight pipe group of variable diameter and the straight pipe group of the same diameter are connected to the air outlet end of the air inlet pipe 1, and the air outlet ends of the the variable diameter straight pipe group and the same diameter straight pipe group are respectively connected to the air inlet end of the air outlet pipe group; a forked straight tube of equal diameter 12, one end of which is connected to the straight tube group of variable diameter and another end of which is connected to the straight tube group of equal diameter; a coal and gas excavator 20 connected to one of the variable diameter straight tube group and the same diameter straight tube group; a monitoring component 11 which is respectively arranged on the air inlet pipe 1, the air outlet pipe group, the straight pipe group of variable diameter, the bifurcated straight pipe of the same diameter 12 and the straight pipe group of the same diameter, the monitoring component 11
    ; BE2020 / 5569 comprises a pressure monitoring device 13 for monitoring the pressure, a wind speed monitoring device 14 for monitoring the wind speed and a gas concentration monitoring device 15 for monitoring the gas concentration; a data acquisition device, wherein the pressure monitoring device 13, the wind speed monitoring device 14 and the gas concentration monitoring device 15 are each in communication with the data acquisition device in order to transmit the pressure information, the wind speed information and the gas concentration information to the data acquisition device.
    In particular, the variable diameter straight tube group and the same diameter straight tube group are made of clear acrylic material.
    The eruption device 20 uses a mixed gas of nitrogen and carbon dioxide having a volume ratio of 6: 4 to replace the gas, the eruption phenomenon of the mixed gas is close to that of the gas and has a high similarity to the gas.
    The variable diameter straight tube group, the same diameter straight tube group, and the same diameter forked straight tube 12 are divided into three different kinds of tubes.
    The pressure monitoring device 13 is used to monitor the propagation properties of the shock wave overpressure in the shaft along the straight pipe group of variable diameter, the straight pipe group of the same diameter and the forked straight pipe of the same diameter 12 after the outbreak of coal and gas, the wind speed monitoring device 14 can be used for Examining the inversion of the manhole branch airflow under the action of the outbreak of coals and gas, the gas concentration monitor can be used to examine the counterflow of gas in the straight pipe group of variable diameter, the straight pipe group of equal diameter and the bifurcated straight pipe of equal diameter 12 after the outbreak used by coals and gas.
    The straight tube group with variable diameter is used to study the changes in the propagation of the shock wave overpressure in the branches with different cross-sectional areas after the eruption of coals and gas and to simulate the inversion of the air flow and the countercurrent of gas in the branches with different cross-sectional areas.
    The forked pipe is used to investigate the changes in the propagation of the shock wave overpressure at various forked points and in the shaft branches after the outbreak of coal and gas and to simulate the inversion of the air flow and the counter flow of gas at various forked points and in the shaft branches .
    By changing the area of the breakout opening of the breakout device 20 or the pressure and volume of the injected gas, a change in the breakout strength of coals and gas is realized.
    In the normal ventilation condition of the shaft branches, the experimental device realizes a simulation of the disturbances for the shaft branch air flow caused by the outbreak strength of coal and gas, whereby the influence of the outbreak of
    Coals and gas can be examined for the occurrence of air flow turbulence of the shaft branch.
    In some embodiments, a fan 21 is arranged at the air outlet end of the air outlet pipe group to change the flow rate of the duct branch air flow. In particular, the air outlet pipe group comprises a fourth straight pipe 6 and a fifth straight pipe 7, wherein an air inlet end of the fourth straight pipe 6 is connected to the air outlet ends of the straight pipe group of variable diameter and the straight pipe group of the same diameter, and an air outlet end of the fourth straight pipe 6 is connected to an air inlet end of the fifth straight pipe 7, and wherein the fan 21 is disposed at an air outlet end of the fifth straight pipe 7. The experimental device simulates suction ventilation of the shaft with the outbreak of coal and gas, the fan 21 being a centrifugal fan. The change in the external and internal conditions of the air flow turbulence of the shaft branch is realized by changing the breakout strength of coal and gas and the wind speed of the shaft branch air flow.
    In some embodiments, the experimental device for the air flow turbulence induced by the outbreak of coal and gas of the mine shaft branch further comprises a first intermediate pipe 9 and a second intermediate pipe 10, the air inlet end of the straight pipe group of variable diameter through the first intermediate pipe 9 with the air outlet end of the air inlet pipe 1, and wherein the air outlet end of the straight pipe group of the same diameter is connected through the second intermediate pipe 10 to the air inlet end of the air outlet pipe group. The first intermediate pipe 9 and the second intermediate pipe 10 are each formed as a structure of the straight pipe, the first intermediate pipe 9 and the second intermediate pipe 10 each being aligned perpendicular to the straight pipe group with variable diameter and the straight pipe group with the same diameter.
    In particular, the air outlet end of the air inlet pipe 1, the air inlet end of the straight pipe group of the same diameter and one end of the first intermediate pipe 9 are connected to one another by a first right-angled three-way joint 16, the other end of the first intermediate pipe 9 being connected to the air inlet end of the through a first right-angled elbow pipe 19 straight tube group of variable diameter is connected, and wherein the air outlet end of the straight tube group of equal diameter is connected by a second right-angled elbow tube 2 to one end of the second intermediate tube 10, and wherein the air outlet end of the straight tube group of variable diameter, the other end of the second The intermediate pipe 10 and the air inlet end of the air outlet pipe group are connected to one another by a second right-angled three-way joint 17.
    In some embodiments, the variable diameter straight tube group includes a first straight tube 3, a second straight tube 4, and a third straight tube
    5, which are coaxially arranged and connected one after another along the axis direction, wherein the monitoring component 11 is arranged on the first straight pipe 3, the second straight pipe 4 and the third straight pipe 5, respectively, and the diameter of the third straight pipe 5 is the same as is the diameter of the first straight pipe 3 and the diameters of the two are not the same as the diameter of the second straight pipe 4, and wherein an end of the first straight pipe 3 facing away from the second straight pipe 4 through the first intermediate pipe 9 with the air outlet end of the air inlet pipe 1, while an end of the third straight pipe 5 facing away from the second straight pipe 4 is connected to the air inlet end of the air outlet pipe. One end of the forked straight tube with the same diameter 12 facing away from the straight tube group with the same diameter and the breakout device 20 are each connected to the third straight tube 5. In particular, the diameter of the second straight pipe 4 is larger than the diameter of the first straight pipe 3 and the third straight pipe 5, the two ends of the second straight pipe 4 being connected to the first straight pipe 3 and through a first diameter changing adapter and a second diameter changing adapter the second straight pipe 4, and wherein the excavation device 20 is connected to the third straight pipe 5 by a third right-angled three-way joint 18.
    In some exemplary embodiments, the straight tube group with the same diameter comprises a plurality of sixth straight tubes 8, which are arranged coaxially and connected one after the other along the axial direction, the monitoring component 11 being arranged on each of the sixth straight tubes 8. The number of the sixth straight pipes is determined in accordance with the length of the straight pipe group of the same diameter, and the length of the straight pipe group of the same diameter is easy to adjust. In Figure 1, the number of sixth straight tubes is in particular
    5.
    In some exemplary embodiments, the forked straight tube of the same diameter 12 is arranged at an incline. Specifically, the inclination angle of the bifurcated straight pipe of the same diameter is 45 degrees, and the bifurcated straight pipe of the same diameter 12 is connected to the third straight pipe 5 by a 45-degree three-way joint.
    In some exemplary embodiments, the pressure monitoring device 13 is a pressure sensor, the wind speed monitoring device 14 is a wind speed sensor and the gas concentration monitoring device 15 is a gas concentration sensor. As shown in FIG. 2, the pressure monitoring device 13, the wind speed monitoring device 14 and the gas concentration monitoring device 15 are arranged uniformly along the circumferential direction of the respective pipes.
    It should be noted that the variable diameter straight tube group refers to the fact that the diameters of the respective cuts along the axis direction of the variable diameter straight tube group are not completely identical to each other, and the same diameter straight tube group refers to the fact that the Diameters of the respective cuts along the axis direction of the variable-diameter straight pipe group are completely identical to each other.
    In connection with examples, the principle and the embodiment are explained in more detail in the present description. All explanations of the embodiments are only intended to aid in understanding the method of the present invention and its core ideas; at the same time, one of ordinary skill in the art will make a change in the detailed embodiment and field of use based on the spirit of the present invention. In summary, the content of the description should not be construed as a limitation for the present invention.
    权利要求:
    Claims (10)
    [1]
    1. Experimental device for the coal and gas eruption induced air flow turbulence of the mine shaft branch, characterized in that it comprises: - an air inlet pipe for air inlet; - an air outlet pipe group for the air outlet; - A two-straight pipe system comprising a straight pipe group of variable diameter and a straight pipe group of the same diameter, wherein the air inlet ends of the straight pipe group of variable diameter and the straight pipe group of the same diameter are connected to the air outlet end of the air inlet pipe, and the air outlet ends of the the variable diameter straight pipe group and the same diameter straight pipe group are respectively connected to the air inlet end of the air outlet pipe group; A forked straight pipe of the same diameter, one end of which is connected to the straight pipe group of variable diameter and another end of which is connected to the straight pipe group of the same diameter; A coal and gas excavator connected to one of the variable-diameter straight tube group and the same-diameter straight tube group; - A monitoring component which is respectively arranged on the air inlet pipe, the air outlet pipe group, the straight pipe group with variable diameter, the bifurcated straight pipe with the same diameter and the straight pipe group with the same diameter, the monitoring component being a pressure monitoring device for monitoring the pressure, a wind speed monitoring device for Monitoring wind speed and a gas concentration monitor for monitoring gas concentration; - A data acquisition device, wherein the pressure monitoring device, the wind speed monitoring device and the gas concentration monitoring device are each in communication with the data acquisition device.
    [2]
    2. Experimental device for the air flow turbulence induced by the outbreak of coal and gas of the mine shaft branch according to claim 1, characterized in that a fan is arranged at the air outlet end of the air outlet pipe group.
    [3]
    3. Experimental device for the air flow turbulence induced by the eruption of coal and gas of the mine shaft branch according to claim 2, characterized in that the air outlet pipe group comprises a fourth straight pipe and a fifth straight pipe, an air inlet end of the fourth straight pipe each with the air outlet ends of the variable diameter straight pipe group and the same diameter straight pipe group are connected, and wherein an air outlet end of the fourth straight pipe is connected to an air inlet end of the fifth straight pipe, and the fan is disposed at an air outlet end of the fifth straight pipe.
    [4]
    4. The experimental apparatus for the coal and gas eruption induced air flow turbulence of the mine shaft branch according to claim 1, characterized in that the apparatus further comprises a first intermediate pipe and a second intermediate pipe, the air inlet end of the straight pipe group of variable diameter through the first intermediate pipe is connected to the air outlet end of the air inlet pipe, and wherein the air outlet end of the straight pipe group of the same diameter is connected to the air inlet end of the air outlet pipe group through the second intermediate pipe.
    [5]
    5. Experimental device for the air flow turbulence induced by the eruption of coal and gas of the mine shaft branch according to claim 4, characterized in that the straight pipe group of variable diameter comprises a first straight pipe, a second straight pipe and a third straight pipe, which are arranged coaxially and successively connected along the axis direction, wherein the monitoring component is arranged on the first straight pipe, the second straight pipe and the third straight pipe, respectively, and the diameter of the third straight pipe is the same as the diameter of the first straight pipe and the diameters of the two are not the same as the diameter of the second straight pipe, and wherein an end of the first straight pipe remote from the second straight pipe is connected by the first intermediate pipe to the air outlet end of the air inlet pipe, while an end remote from the second straight pipe is connected to the third straight pipe with is connected to the air inlet end of the air outlet pipe.
    [6]
    6. Experimental device for the air flow turbulence induced by the outbreak of coal and gas of the mine shaft branch according to claim 5, characterized in that one of the straight pipe group with the same diameter facing away from the end of the forked straight pipe with the same diameter and the breakout device each with the third straight pipe connected is.
    [7]
    7. Experimental device for the air flow turbulence induced by the outbreak of coal and gas of the mine shaft branch according to claim 4, characterized in that the first intermediate pipe and the second intermediate pipe are each formed as a structure of the straight pipe, the first intermediate pipe and the second intermediate pipe are each aligned perpendicular to the straight pipe group with variable diameter and the straight pipe group with the same diameter.
    [8]
    8. An experimental device for the air flow turbulence of the mine shaft branch induced by the eruption of coal and gas according to claim 1, characterized in that the straight pipe group of the same diameter comprises a plurality of sixth straight pipes arranged coaxially and connected one after the other along the axis direction, where an the respective sixth straight pipes the monitoring component is arranged in each case.
    [9]
    9. Experimental device for the air flow turbulence induced by the outbreak of coal and gas of the mine shaft branch according to claim 1, characterized in that the forked straight pipe is inclined with the same diameter.
    [10]
    10. Experimental device for the air flow turbulence of the mine shaft branch induced by the outbreak of coal and gas, characterized in that the pressure monitoring device is a pressure sensor, the wind speed monitoring device is a wind speed sensor and the gas concentration monitoring device is a gas concentration sensor.
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    引用文献:
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    法律状态:
    2021-05-26| FG| Patent granted|Effective date: 20210402 |
    优先权:
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