Ventilation structure for coal bunker gas control

Abstract

The utility model discloses a ventilation structure for coal bunker gas management, including the partial ventilator of the upper portion setting of coal bunker, partial ventilator connection telescopic air duct, the front section of telescopic air duct is vertical section telescopic air duct, and the vertical section telescopic air duct vertical natural droop stretches into the coal bunker, and the upper portion of vertical section telescopic air duct sets up first guide wheel, and one side of coal bunker sets up the winch of taking up and paying off, and the front of winch of taking up and paying off sets up second guide wheel, and the steel wire rope of winch of taking up and paying off is connected the front end of vertical section telescopic air duct after winding second guide wheel and first guide wheel, and the position sensor for monitoring the coal level of coal bunker is set up at the upper along of coal bunker, and position sensor electric connection controller, and controller electric connection winch of taking up and paying off. The utility model discloses can keep the fixed distance of telescopic air duct's telescopic and coal bunker coal level, can blow away the gas that coal body releases in coal bunker in time, avoids gas accumulation, causes gas accident, and avoids the dust flying of the air duct air outlet from coal body too close.

Description

Technical Field

[0001] This utility model relates to the technical field of coal bunker gas control, and in particular to a ventilation structure for coal bunker gas control. Background Technology

[0002] Methane gas, a byproduct of coal mining, poses a significant threat to mine safety. Methane explosions, the most frequent and dangerous type of accident, can cause numerous deaths, destroy tunnel infrastructure, disrupt ventilation systems, and even trigger secondary disasters such as coal dust explosions and fires. Coal bunkers, as coal storage facilities, are key areas for methane control, as they are highly susceptible to methane accumulation, exceeding methane limits, and accompanied by coal dust emissions. Currently, traditional local ventilation systems connect ventilation ducts to the top of the coal bunker. The duct outlets are fixed and cannot be moved, with a range of 10-15 meters. Coal bunker depths are typically around 50 meters. When the coal level is low, this method is ineffective in preventing methane accumulation; when the coal level is high, it easily leads to excessive coal dust and makes it difficult to monitor the bunker's condition. Therefore, there is an urgent need for a ventilation structure that can maintain a fixed distance from the coal level as it changes. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a ventilation structure for coal bunker gas control.

[0004] The technical solution adopted by this utility model is a ventilation structure for coal bunker gas control, including a local ventilator installed above the coal bunker, the local ventilator being connected to a retractable duct, the front section of which is a vertical retractable duct that extends vertically into the coal bunker, a first guide wheel being installed above the vertical retractable duct, a winding winch being installed on one side of the coal bunker, a second guide wheel being installed in front of the winding winch, the wire rope of the winding winch being wound around the second guide wheel and connected to the first guide wheel and then connected to the front end of the vertical retractable duct, and a position sensor for monitoring the coal level in the coal bunker being installed at the upper edge of the coal bunker, the position sensor being electrically connected to a controller, and the controller being electrically connected to the winding winch.

[0005] Furthermore, guide rings are symmetrically and vertically spaced on the outer side of the vertical section of the telescopic ventilation duct. The winding winch adopts a double-drum winding winch, and the two steel wire ropes of the double-drum winding winch are respectively threaded into the guide rings on both sides and connected to the front end of the telescopic ventilation duct.

[0006] Furthermore, a retractable ventilation duct fixing frame is installed at the upper edge of the coal bunker, and the vertical section of the retractable ventilation duct passes through the retractable ventilation duct fixing frame and extends into the coal bunker.

[0007] Furthermore, the position sensor employs an ultrasonic level gauge.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] This ventilation structure is highly adaptable and suitable for all coal bunkers, both above and below ground. It uses position sensors to monitor the coal level in the bunker and feeds the data back to the controller. The controller then moves the telescopic ventilation duct up and down by controlling the extension and retraction of the wire rope via a winch. This ensures that the ventilation duct outlet maintains a fixed distance from the coal body in the bunker, preventing accidents and protecting the lives and assets of personnel. It has great potential for widespread application. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] In the diagram: 1. Coal bunker; 2. Position sensor; 3. Guide ring; 4. Retractable ventilation duct fixing frame; 5. Retractable ventilation duct; 6. First guide wheel; 7. Second guide wheel; 8. Winding winch; 9. Local ventilation fan; 10. Wire rope; 11. Controller. Detailed Implementation

[0012] To better understand the purpose, structure, and function of this utility model, the following detailed description of a ventilation structure for coal bunker gas control, in conjunction with the accompanying drawings, is provided.

[0013] like Figure 1 As shown, a ventilation structure for coal bunker gas control includes a local ventilator 9 installed above the coal bunker 1. The local ventilator 9 is connected to a retractable duct 5. The front section of the retractable duct 5 is a vertical retractable duct that extends vertically into the coal bunker 1. A first guide wheel 6 is installed above the vertical retractable duct. A winding winch 8 is installed on one side of the coal bunker 1. A second guide wheel 7 is installed in front of the winding winch 8. The wire rope 10 of the winding winch 8 is wound around the second guide wheel 7 and connected to the first guide wheel 6 and then connected to the front end of the vertical retractable duct. A position sensor 2 for monitoring the coal level in the coal bunker is installed at the upper edge of the coal bunker 1. The position sensor 2 is electrically connected to a controller 11. The controller 11 is electrically connected to the winding winch 8. The controller 11 receives coal level data monitored by the position sensor 2 and moves the retractable duct 5 up and down by controlling the winding winch to extend and retract the wire rope 10, so that the outlet of the retractable duct 5 is kept at a fixed distance from the coal body in the coal bunker.

[0014] In this embodiment, a retractable ventilation duct fixing frame 4 is provided at the upper edge of the coal bunker 1. The vertical section of the retractable ventilation duct passes through the retractable ventilation duct fixing frame 4 and extends into the coal bunker 1. The retractable ventilation duct fixing frame 4 is used to fix and store the retractable ventilation duct 5. The coal level in the coal bunker is monitored using an ultrasonic level gauge. Guide rings 3 are symmetrically and vertically spaced on the outer side of the vertical section of the retractable ventilation duct. The winding winch 8 adopts a double-drum winding winch. The two steel wire ropes 10 of the double-drum winding winch are respectively passed through the guide rings 3 on both sides and connected to the front end of the retractable ventilation duct 5.

[0015] The local ventilation fan 9 is connected to the retractable duct 5 to supply air to the coal bunker 1. The double-drum winding winch, ultrasonic level gauge and controller 11 are connected. The controller 11 receives the signal transmitted by the ultrasonic level gauge and controls the double-drum winding winch to adjust the length of the wire rope 10 to change the length of the retractable duct 5, so as to control the air outlet of the duct to maintain a fixed distance from the coal body in the coal bunker.

[0016] The local ventilation system of this embodiment can maintain a fixed distance from the coal bunker and coal level by extending and retracting the retractable duct 5. It can promptly disperse the gas released from the coal body in the coal bunker 1, avoid gas accumulation and gas accidents, and prevent the air outlet of the duct from being too close to the coal body, which would cause dust to fly and result in the dust concentration in the roadway generally exceeding the standard seriously, threatening safe production and the health of workers.

[0017] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A ventilation structure for coal bunker gas control, characterized in that, The system includes a local ventilator (9) installed above the coal bunker (1), which is connected to a retractable duct (5). The front section of the retractable duct (5) is a vertical retractable duct. The vertical retractable duct extends vertically into the coal bunker (1). A first guide wheel (6) is installed above the vertical retractable duct. A winding winch (8) is installed on one side of the coal bunker (1). A second guide wheel (7) is installed in front of the winding winch (8). The wire rope (10) of the winding winch (8) is wound around the second guide wheel (7) and the first guide wheel (6) and then connected to the front end of the vertical retractable duct. A position sensor (2) for monitoring the coal level in the coal bunker (1) is installed at the upper edge of the coal bunker (1). The position sensor is electrically connected to a controller (11), and the controller (11) is electrically connected to the winding winch (8).

2. The ventilation structure for coal bunker gas control according to claim 1, characterized in that, Guide rings (3) are symmetrically and vertically spaced on the outer side of the vertical section of the telescopic duct. The winding winch (8) adopts a double-drum winding winch. The two steel wire ropes (10) of the double-drum winding winch are respectively inserted into the guide rings (3) on both sides and connected to the front end of the telescopic duct (5).

3. The ventilation structure for coal bunker gas control according to claim 1 or 2, characterized in that, A retractable ventilation duct fixing frame (4) is installed at the upper edge of the coal bunker (1), and the vertical section of the retractable ventilation duct passes through the retractable ventilation duct fixing frame (4) and extends into the coal bunker (1).

4. The ventilation structure for coal bunker gas control according to claim 1, characterized in that, The position sensor (2) is an ultrasonic level gauge.

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