Coal face upper corner gas extraction treatment safety device

Abstract

The invention belongs to the technical field of coal mine mechanical equipment, and particularly relates to a coal face upper corner gas extraction treatment safety device which comprises a workbench, an anti-vortex mechanism is arranged at the corner of the workbench and comprises a rigid plate installed at the corner of the workbench, and an air bag is installed on the side, close to the corner of the workbench, of the rigid plate. A linkage assembly for automatically inflating and deflating the air bag is arranged at the bottom of the rigid plate and comprises an air storage tank fixedly installed at the bottom of the rigid plate, an air storage groove and a funnel-shaped groove are formed in an inner cavity of the air storage tank, a blocking ball is slidably connected to the communicating position of the air storage groove and the funnel-shaped groove, and a connecting rod is fixedly connected to the bottom of the blocking ball. A balancing weight is fixedly installed at the end, away from the blocking ball, of the connecting rod, and the top of the air storage tank communicates with a one-way pipe communicating with an inner cavity of the air bag. The technical means that the rigid plate is matched with the air bag is adopted, the air bag is attached to the corner of the workbench, and airflow turbulence caused by protrusions is eliminated.

Description

Technical Field

[0001] This invention belongs to the field of coal mine machinery and equipment technology, specifically a safety device for gas extraction and control in the upper corner of a coal mining face. Background Technology

[0002] The upper corner of the coal face is an area where gas can easily accumulate (due to poor airflow forming eddies). Excessive gas concentration can easily lead to safety accidents such as explosions and suffocation. Extraction and treatment can control the concentration within a safe threshold, ensuring the safety of underground operations.

[0003] Patent application CN210178415U discloses a safety device for gas extraction and control in the upper corner of a coal mining face, including a workbench and an anti-vortex device. The front side wall of the workbench has an air inlet pipe and an air outlet pipe. The anti-vortex device is installed at a right angle on the left side of the front side wall of the workbench. A gas discharge pipe is inserted into the left side wall of the anti-vortex device and connected to the workbench via a fixing bracket. A curved plate is embedded in the lower right side of the anti-vortex device and is fixedly embedded in the workbench. The curved plate has multiple through holes inside, each containing a curved pipe. This safety device for gas extraction and control in the upper corner of a coal mining face has a reasonable structural design. The anti-vortex device is installed at a right angle on the upper part of the workbench, and the curved plate is tightly connected to the wall, eliminating protrusions at the connection point and reducing air resistance, thereby reducing the amount of gas retained in the upper corner.

[0004] Although the aforementioned patent documents can reduce the amount of gas retained at the upper corner, the shape of the curved plate in the device is relatively fixed, making it inconvenient to make adaptive adjustments according to the actual shape of the tunnel corner, resulting in a limited range of applications. Once the shape of the tunnel corner is irregular or the space is narrow, it is difficult to ensure that the curved plate is tightly connected to the wall, which weakens the anti-vortex effect of the device. Summary of the Invention

[0005] The purpose of this invention is to provide a safety device for gas extraction and control in the upper corner of a coal mining face, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a safety device for gas extraction and control at the corner of a coal mining face, comprising a workbench, an anti-vortex mechanism at the corner of the workbench, the anti-vortex mechanism comprising a rigid plate installed at the corner of the workbench, an airbag installed on the side of the rigid plate near the corner of the workbench, a linkage component for automatically inflating and deflating the airbag at the bottom of the rigid plate, the linkage component comprising an air tank fixedly installed at the bottom of the rigid plate, the inner cavity of the air tank having an air storage groove and a funnel-shaped groove, a plug bead slidably connected at the connection between the air storage groove and the funnel-shaped groove, a connecting rod fixedly connected to the bottom of the plug bead, a counterweight fixedly installed at the end of the connecting rod away from the plug bead, and a one-way pipe connected to the inner cavity of the airbag at the top of the air tank, thereby reducing airflow turbulence caused by the protrusion by the airbag fitting against the corner of the workbench.

[0007] Preferably, a bolt is provided on the side of the rigid plate away from the corner of the workbench, and the rigid plate is fixed to the workbench by the bolt.

[0008] Preferably, an air inlet pipe and an air outlet pipe are provided on one side of the workbench, the air inlet pipe is connected to an external blower, and the air inlet pipe, the workbench and the air outlet pipe together form a ring-shaped ventilation system.

[0009] Preferably, a conical gas extraction nozzle for extracting gas at the corner of the workbench is slidably connected to the rigid plate.

[0010] Preferably, a gas extraction pipe is fixedly installed on the other side of the workbench. One end of the gas extraction pipe is connected to a telescopic pipe, and the end of the telescopic pipe away from the gas extraction pipe is connected to a conical gas extraction nozzle. The other end of the gas extraction pipe is connected to the mine extraction system.

[0011] Preferably, a linkage rod is fixedly installed on the side of the airbag away from the corner of the workbench, and the linkage rod is fixedly connected to the conical gas extraction nozzle.

[0012] Preferably, the rigid plate has a sliding groove in its inner cavity for the linkage rod to slide.

[0013] Preferably, the inner cavity of the rigid plate is further provided with a T-shaped groove, and a T-shaped slider that is fixedly connected to the conical gas extraction nozzle is slidably connected to the inner cavity of the T-shaped groove. The side of the T-shaped slider away from the conical gas extraction nozzle is fixedly connected to the linkage rod.

[0014] The beneficial effects of this invention are as follows: 1. This invention employs a combination of rigid plates and airbags. By fitting the airbags to the corners of the worktable, airflow turbulence caused by protrusions is reduced. When the internal pressure of the airbags falls below a set value due to excessive compression caused by the protrusions, the pulling force of the counterweight causes the plug bead to leave the connection between the air tank and the funnel-shaped groove. At this time, the air tank replenishes air to the airbags through a one-way pipe. When the internal pressure of the airbags rises to the set value, the gas thrust pushes up the plug bead, stopping the replenishment of air. This allows the airbags to adapt to the shape changes at the corners of the worktable, thereby ensuring the anti-eddy current effect of the equipment and making it convenient to use.

[0015] 2. This invention employs a combination of an airbag and a conical gas extraction nozzle. By fitting the airbag against the corner of the workbench, airflow turbulence caused by protrusions is reduced. Furthermore, the expansion or contraction of the airbag drives the conical gas extraction nozzle to slide along the inner cavity of the T-shaped groove via a linkage rod, thereby ensuring that the conical gas extraction nozzle is in the appropriate position, thus facilitating the effective extraction of gas from the vortex area. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention; Figure 2 This is a schematic diagram of the anti-eddy current mechanism of the present invention; Figure 3 This is a schematic diagram of the internal structure of the gas storage tank of the present invention; Figure 4 This is a schematic diagram of the overall structure of the second embodiment of the present invention; Figure 5 For the present invention Figure 4 The enlarged view of point A shown below; Figure 6 For the present invention Figure 5 The diagram shows the internal structure of the rigid plate. Figure 7 For the present invention Figure 5 The diagram shows a side view of the rigid plate.

[0017] In the picture: 1. Workbench; 2. Air inlet duct; 3. Air outlet duct; 4. Rigid plate; 41. Bolt; 5. Airbag; 51. Air tank; 52. Air reservoir; 53. Funnel-shaped groove; 54. Fixing plate; 55. Connecting rod; 56. Plug; 57. Counterweight; 58. Vent pipe; 59. One-way pipe; 6. Extraction pipe; 61. Telescopic pipe; 62. Conical gas extraction nozzle; 63. Sliding groove; 64. Linkage rod; 65. T-shaped sliding groove; 66. T-shaped slider; 67. Mounting plate. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0019] like Figures 1 to 3 As shown, this embodiment of the invention provides a safety device for gas extraction and control in the upper corner of a coal mining face, including a workbench 1. An air inlet pipe 2 and an air outlet pipe 3 are provided on one side of the workbench 1. The air inlet pipe 2 is connected to an external blower. The air inlet pipe 2, the workbench 1, and the air outlet pipe 3 together form a ring-shaped ventilation system.

[0020] Furthermore, the air inlet duct 2 is connected to an external blower, which continuously supplies fresh air into the workbench 1. This not only dilutes the gas concentration in the corners but also creates a directional airflow, pushing the gas towards the extraction area. The air outlet duct 3 promptly discharges the gas-laden mixture, preventing gas accumulation in the workbench 1. In conjunction with the anti-vortex mechanism, this further reduces the possibility of gas retention.

[0021] An anti-vortex mechanism is provided at the corner of the workbench 1. The anti-vortex mechanism includes a rigid plate 4 installed at the corner of the workbench 1. A bolt 41 is provided on the side of the rigid plate 4 away from the corner of the workbench 1. The rigid plate 4 is fixed to the workbench 1 by the bolt 41. An airbag 5 is installed on the side of the rigid plate 4 near the corner of the workbench 1.

[0022] Furthermore, the airbag 5 is made of neoprene rubber and is an integral design without partitioned air chambers. Its function is to fit the irregular protrusions at the corner of the workbench 1, eliminate airflow turbulence points, transform the uneven corner into an approximately streamlined curved surface, and guide the airflow to flow smoothly.

[0023] The bottom of the rigid plate 4 is equipped with a linkage component for automatically inflating and deflating the airbag 5. The linkage component includes an air tank 51 fixedly installed at the bottom of the rigid plate 4. The inner cavity of the air tank 51 has an air storage groove 52. The inner cavity of the air tank 51 also has a funnel-shaped groove 53 that communicates with the air storage groove 52. A sealing element is provided at the connection between the air tank 51 and the funnel-shaped groove 53. The sealing element includes a plug that is slidably connected to the connection between the air tank 51 and the funnel-shaped groove 53. A fixing plate 54 is fixedly connected between the two inner walls of the gas storage tank 51 and the bead 56. A connecting rod 55, which is fixedly connected to the bead 56, is slidably connected to the middle of the fixing plate 54. A counterweight 57 is fixedly installed at the end of the connecting rod 55 away from the bead 56. A vent pipe 58 is connected to the top of the gas storage tank 51. A one-way pipe 59 is connected to the end of the vent pipe 58 away from the gas storage tank 51. The end of the one-way pipe 59 away from the vent pipe 58 is connected to the inner cavity of the airbag 5.

[0024] Furthermore, the air tank 51 is a cylindrical steel tank, and the air tank 51 is pre-filled with 0.6MPa compressed air. The function of the plug 56, connecting rod 55 and counterweight 57 is to control the automatic inflation and deflation of air from the air tank 51 into the inner cavity of the airbag 5. When the pressure in the inner cavity of the airbag 5 is lower than the set value, the pulling force of the counterweight 57 causes the plug 56 to leave the connection between the air tank 51 and the funnel-shaped groove 53. At this time, the air tank 51 replenishes air to it through the one-way pipe 59. When the pressure in the inner cavity of the airbag 5 rises to the set value, the gas thrust pushes up the plug 56 and stops replenishing air.

[0025] Working principle: First, a comprehensive inspection of the equipment is carried out. After the inspection is completed, the rigid plate 4 is installed at the corner of the workbench 1 by bolt 41. When there is a protrusion (such as a coal block or a support steel pipe) at the corner of the workbench 1, the protrusion squeezes the air bag 5 on one side of the rigid plate 4. The air bag 5 expands outward due to its elasticity, filling the gap between the protrusion and the rigid plate 4. When the internal pressure of the air bag 5 is lower than the set value due to excessive compression by the protrusion, the pulling force of the counterweight 57 causes the blocking bead 56 to leave the connection between the gas storage tank 51 and the funnel-shaped groove 53. At this time, the gas storage tank 51 replenishes the gas through the one-way pipe 59. When the internal pressure of the air bag 5 rises to the set value, the gas thrust pushes up the blocking bead 56 and stops the gas replenishment. Example

[0026] like Figures 4 to 7 As shown, this embodiment of the invention provides a safety device for gas extraction and control in the upper corner of a coal mining face, including a workbench 1. An air inlet pipe 2 and an air outlet pipe 3 are provided on one side of the workbench 1. The air inlet pipe 2 is connected to an external blower. The air inlet pipe 2, the workbench 1, and the air outlet pipe 3 together form a ring-shaped ventilation system.

[0027] Furthermore, the air inlet duct 2 is connected to an external blower, which continuously supplies fresh air into the workbench 1. This not only dilutes the gas concentration in the corners but also creates a directional airflow, pushing the gas towards the extraction area. The air outlet duct 3 promptly discharges the gas-laden mixture, preventing gas accumulation in the workbench 1. In conjunction with the anti-vortex mechanism, this further reduces the possibility of gas retention.

[0028] Compared with Embodiment 1, Embodiment 2 proposes another anti-vortex mechanism, including a rigid plate 4 installed at the corner of the workbench 1. A bolt 41 is provided on the side of the rigid plate 4 away from the corner of the workbench 1. The rigid plate 4 is fixed to the workbench 1 by the bolt 41. An airbag 5 is installed on the side of the rigid plate 4 near the corner of the workbench 1.

[0029] Furthermore, the airbag 5 is made of neoprene rubber and is an integral design without partitioned air chambers. Its function is to fit the irregular protrusions at the corner of the workbench 1, eliminate airflow turbulence points, transform the uneven corner into an approximately streamlined curved surface, and guide the airflow to flow smoothly.

[0030] The bottom of the rigid plate 4 is equipped with a linkage component for automatically inflating and deflating the airbag 5. The linkage component includes an air tank 51 fixedly installed at the bottom of the rigid plate 4. The inner cavity of the air tank 51 has an air storage groove 52. The inner cavity of the air tank 51 also has a funnel-shaped groove 53 that communicates with the air storage groove 52. A sealing element is provided at the connection between the air tank 51 and the funnel-shaped groove 53. The sealing element includes a plug that is slidably connected to the connection between the air tank 51 and the funnel-shaped groove 53. A fixing plate 54 is fixedly connected between the two inner walls of the gas storage tank 51 and the bead 56. A connecting rod 55, which is fixedly connected to the bead 56, is slidably connected to the middle of the fixing plate 54. A counterweight 57 is fixedly installed at the end of the connecting rod 55 away from the bead 56. A vent pipe 58 is connected to the top of the gas storage tank 51. A one-way pipe 59 is connected to the end of the vent pipe 58 away from the gas storage tank 51. The end of the one-way pipe 59 away from the vent pipe 58 is connected to the inner cavity of the airbag 5.

[0031] Furthermore, the air tank 51 is a cylindrical steel tank, and the air tank 51 is pre-filled with 0.6MPa compressed air. The function of the plug 56, connecting rod 55 and counterweight 57 is to control the automatic inflation and deflation of air from the air tank 51 into the inner cavity of the airbag 5. When the pressure in the inner cavity of the airbag 5 is lower than the set value, the pulling force of the counterweight 57 causes the plug 56 to leave the connection between the air tank 51 and the funnel-shaped groove 53. At this time, the air tank 51 replenishes air to it through the one-way pipe 59. When the pressure in the inner cavity of the airbag 5 rises to the set value, the gas thrust pushes up the plug 56 and stops replenishing air.

[0032] On the other side of the workbench 1, an extraction pipe 6 is fixedly installed. One end of the extraction pipe 6 is connected to a telescopic pipe 61. A conical gas extraction nozzle 62, which is connected to the telescopic pipe 61, is slidably connected to the rigid plate 4. The function of the conical gas extraction nozzle 62 is to form a negative pressure zone. Its shape increases the gas flow rate and reduces the pressure, thereby drawing the gas in the vortex zone into the extraction pipe 6. A linkage rod 64 is fixedly installed on the side of the airbag 5 away from the corner of the workbench 1. The function of the linkage rod 64 is to transmit the thrust or pull of the airbag 5. The linkage rod 64 is fixedly installed in the center of one side of the airbag 5 to ensure that it can transmit the thrust or pull of the airbag 5 evenly and ensure that the conical gas extraction nozzle 62 moves smoothly.

[0033] The rigid plate 4 has a sliding groove 63 in its inner cavity for sliding the linkage rod 64. The rigid plate 4 also has a T-shaped sliding groove 65 in its inner cavity. A T-shaped slider 66 is slidably connected to the inner cavity of the T-shaped sliding groove 65. The T-shaped slider 66 is fixedly connected to the conical gas extraction nozzle 62. An installation plate 67 is fixedly connected to the linkage rod 64. The side of the installation plate 67 away from the linkage rod 64 is fixedly connected to the T-shaped slider 66. Through the cooperation of the T-shaped slider 66 and the T-shaped sliding groove 65, the conical gas extraction nozzle 62 can slide in a fixed direction to prevent it from deviating.

[0034] Furthermore, the expansion or contraction of the airbag 5 drives the conical gas extraction nozzle 62 to slide along the inner cavity of the T-shaped groove 65 via the linkage rod 64, thereby ensuring that the conical gas extraction nozzle 62 is in the appropriate position. Since one end of the extraction pipe 6 is connected to the conical gas extraction nozzle 62 and the other end of the extraction pipe 6 is connected to the mine extraction system, the conical gas extraction nozzle 62 forms a negative pressure zone. Under the action of pressure difference, the gas in the vortex zone is sucked into the extraction pipe 6 and transported to the mine extraction system, thereby achieving effective gas extraction.

[0035] Working principle: First, a comprehensive inspection of the equipment is carried out. After the inspection is completed, the rigid plate 4 is installed at the corner of the workbench 1 using bolts 41. When there is a protrusion (such as a coal block or a support steel pipe) at the corner of the workbench 1, the protrusion squeezes the airbag 5 on one side of the rigid plate 4. The airbag 5 expands outward due to its elasticity, filling the gap between the protrusion and the rigid plate 4. When the airbag 5 is over-compressed and the internal pressure is lower than the set value, the pulling force of the counterweight 57 causes the plug bead 56 to leave the connection between the gas tank 51 and the funnel-shaped groove 53. At this time, the gas tank 51 replenishes the gas through the one-way pipe 59. When the internal pressure of the airbag 5 rises to the set value, the gas thrust pushes up the plug bead 56 and stops the gas replenishment.

[0036] Simultaneously, the expansion or contraction of the airbag 5 drives the conical gas extraction nozzle 62 to slide along the inner cavity of the T-shaped groove 65 via the linkage rod 64, thereby ensuring that the conical gas extraction nozzle 62 is in the appropriate position. Since one end of the extraction pipe 6 is connected to the conical gas extraction nozzle 62 and the other end of the extraction pipe 6 is connected to the mine extraction system, the conical gas extraction nozzle 62 forms a negative pressure zone. Under the action of pressure difference, the gas in the vortex zone is sucked into the extraction pipe 6 and transported to the mine extraction system, thereby achieving effective gas extraction.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safety device for gas extraction and control in the upper corner of a coal mining face, comprising a workbench (1), characterized in that: An anti-vortex mechanism is provided at the corner of the workbench (1). The anti-vortex mechanism includes a rigid plate (4) installed at the corner of the workbench (1). An airbag (5) is installed on the side of the rigid plate (4) near the corner of the workbench (1). A linkage component for automatically inflating and deflating the airbag (5) is provided at the bottom of the rigid plate (4). The linkage component includes an air tank (51) fixedly installed at the bottom of the rigid plate (4). An air storage groove (52) is opened in the inner cavity of the air tank (51). A funnel-shaped groove (53) is provided at the connection between the gas storage groove (52) and the funnel-shaped groove (53). A connecting rod (55) is fixedly connected to the bottom of the connecting rod (56). A counterweight (57) is fixedly installed at the end of the connecting rod (55) away from the connecting rod (56). A one-way pipe (59) connected to the inner cavity of the air bag (5) is connected to the top of the gas storage tank (51). The air bag (5) is attached to the corner of the workbench (1) to reduce the airflow turbulence caused by the protrusion.

2. The safety device for gas extraction and control in the upper corner of a coal mining face according to claim 1, characterized in that: A bolt (41) is provided on one side of the rigid plate (4) away from the corner of the workbench (1), and the rigid plate (4) is fixed to the workbench (1) by the bolt (41).

3. The safety device for gas extraction and control in the upper corner of a coal mining face according to claim 1, characterized in that: An air inlet pipe (2) and an air outlet pipe (3) are provided on one side of the workbench (1). The air inlet pipe (2) is connected to an external blower. The air inlet pipe (2), the workbench (1) and the air outlet pipe (3) together form a ring-shaped ventilation system.

4. The safety device for gas drainage and control in the upper corner of a coal mining face according to any one of claims 1-3, characterized in that: The anti-vortex mechanism includes a conical gas extraction nozzle (62) that is slidably connected to a rigid plate (4) for extracting gas at the corner of the extraction workbench (1).

5. The safety device for gas extraction and control in the upper corner of a coal mining face according to claim 4, characterized in that: On the other side of the workbench (1), a gas extraction pipe (6) is fixedly installed. One end of the gas extraction pipe (6) is connected to a telescopic pipe (61). The end of the telescopic pipe (61) away from the gas extraction pipe (6) is connected to a conical gas extraction nozzle (62). The other end of the gas extraction pipe (6) is connected to the mine extraction system.

6. The safety device for gas extraction and control in the upper corner of a coal mining face according to claim 5, characterized in that: A linkage rod (64) is fixedly installed on the side of the airbag (5) away from the corner of the workbench (1), and the linkage rod (64) is fixedly connected to the conical gas extraction nozzle (62).

7. The safety device for gas extraction and control in the upper corner of a coal mining face according to claim 6, characterized in that: The rigid plate (4) has a sliding groove in its inner cavity for the linkage rod (64) to slide.

8. The safety device for gas extraction and control in the upper corner of a coal mining face according to claim 7, characterized in that: The rigid plate (4) is also provided with a T-shaped groove (65) in its inner cavity. The inner cavity of the T-shaped groove (65) is slidably connected to a T-shaped slider (66) which is fixedly connected to the conical gas extraction nozzle (62). The side of the T-shaped slider (66) away from the conical gas extraction nozzle (62) is fixedly connected to the linkage rod (64).

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