A monitoring device for gas emission from mine boreholes

Abstract

This utility model discloses a monitoring device for gas emission from mine boreholes, belonging to the field of drilling technology. It includes a blowout preventer, a drill rod, and a dust suppression component. One end of the blowout preventer is fixedly connected to an inclined slag discharge port. The drill rod extends through through holes on both sides, and sealed airbags are respectively provided at the through holes on both sides of the blowout preventer. An orifice spray head is fixedly connected to the slag discharge port, and the orifice spray head is perpendicular to the slag discharge port. This utility model can effectively remove dust mixed in with gas.

Description

Technical Field

[0001] This utility model belongs to the field of drilling technology, and in particular relates to a monitoring device for gas emission from mining boreholes. Background Technology

[0002] Coal mine gas control is a crucial task, especially for high-gas outburst mines. Pre-drainage is essential to ensure safe production. Before pre-drainage, drilling rigs must be used to create boreholes in the coal seam. During drilling, gas may escape from the borehole, exceeding gas limits. Currently, the common practice is to install negative pressure pipelines near the borehole opening to draw out the escaping gas. However, this negative pressure process draws drilling dust into the gas pipeline, which can accumulate over time and cause blockages, affecting extraction efficiency. Therefore, a structure capable of reducing dust from gas is proposed. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a monitoring device for monitoring gas outbursts in mine boreholes, which solves the aforementioned problems.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a mine borehole gas emission monitoring device, including a blowout preventer, a drill rod, and a dust suppression component. One end of the blowout preventer is fixedly connected to an inclined slag discharge port. The drill rod passes through the through holes on both sides of the blowout preventer and is provided with sealed airbags at the through holes on both sides of the blowout preventer. An orifice spray head is fixedly connected to the slag discharge port and is perpendicular to the slag discharge port.

[0005] Beneficial effects

[0006] This utility model provides a monitoring device for monitoring gas emission from mine boreholes, which has the following advantages compared with the prior art:

[0007] 1. During use, the blowout shield is placed at the borehole opening and nested on the drill rod. When drilling, the slag brought out by the drill rod enters the blowout shield. Under its own gravity, it is discharged naturally through the slag outlet and the spray head at the borehole opening after dust suppression. The mixed gas containing gas and dust enters the dust suppression component under negative pressure. When the mixed gas enters the primary diversion chamber through connector A and connector B under the action of the negative pressure component, the spray head in the primary diversion chamber begins to spray water mist. When the dust mixed in the mixed gas comes into contact with the water mist, it can form water slag. Since the water slag itself has a certain weight, most of the water slag is discharged through the primary slag discharge port set vertically at the bottom of the primary diversion chamber, thus performing primary dust suppression treatment on the mixed gas. Subsequently, the mixed gas continues to flow into the flushing component under the action of the negative pressure component. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the blowout shield structure of this utility model.

[0009] Figure 2 This is a schematic diagram of the dust reduction structure of this utility model.

[0010] Figure reference numerals: Blowout shield 101, slag discharge port 201, orifice spray head 202, sealed airbag 203, primary diversion chamber 204, connector A 205, connector B 206, spray head 207, primary slag discharge port 208, intermediate transition chamber 209, backwash nozzle 301, louvered partition 302, secondary diversion chamber 303, secondary slag discharge port 304, negative pressure port 305, gas sensor 306, butterfly valve 307, drill rod 308. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0012] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0013] Please see Figures 1-2 This invention provides a monitoring device for monitoring gas outbursts in mine boreholes, comprising a blowout preventer 101, a drill rod 308, and a dust suppression component. One end of the blowout preventer 101 is fixedly connected to an inclined slag outlet 201. The drill rod 308 passes through through holes on both sides of the blowout preventer 101. Sealed airbags 203 are respectively provided at the through holes on both sides of the blowout preventer 101. An orifice spray head 202 is fixedly connected to the slag outlet 201, and the orifice spray head 202 is perpendicular to the slag outlet 201.

[0014] The dust removal component is used to separate dust from methane gas.

[0015] Specifically, an electric balloon is connected to the inflation port of the sealed airbag 203.

[0016] In the above embodiment, when in use, the blowout shield 101 is placed at the borehole opening, and the drill rod 308 is horizontally inserted into 101. During drilling, the slag brought out by the drill rod enters the blowout shield 101. Under its own gravity, it is discharged naturally after being dusted through the slag outlet 201 and the orifice spray head 202. The mixed gas containing methane and dust enters the dust suppression component under negative pressure.

[0017] Specifically, the dust suppression assembly includes a primary diversion chamber 204, a connector A205, and a flushing assembly. The connector A205 is obliquely and fixedly connected to the side wall of the primary diversion chamber 204, and the blowout shield 101 is inserted into the connector A205 through a connector B206 thereon.

[0018] The flushing assembly is used to cause dust in the mixed gas to settle.

[0019] Specifically, a spray head 207 is fixedly connected to the top of the inner wall of the primary diversion chamber 204, and a primary slag discharge port 208 is provided below the spray head 207. The primary slag discharge port 208 is vertically fixedly connected to the outer wall of the primary diversion chamber 204.

[0020] In the above embodiment, when the mixed gas enters the primary diversion chamber through connector A205 and connector B206 under the action of the negative pressure component, the spray head 207 in the primary diversion chamber 204 begins to spray water mist. When the dust mixed in the mixed gas comes into contact with the water mist, it can form water slag. Since the water slag itself has a certain weight, most of the water slag is discharged from the primary slag discharge port 208, which is vertically set at the bottom of the primary diversion chamber 204, thereby performing a dust reduction treatment on the mixed gas. Subsequently, the mixed gas continues to flow into the flushing component under the action of the negative pressure component.

[0021] Specifically, the flushing assembly includes an intermediate transition chamber 209 and a negative pressure assembly. The intermediate transition chamber 209 is arranged parallel to the end of the primary diversion chamber 204, and a backwash nozzle 301 is fixedly connected to one end of the intermediate transition chamber 209 near the primary diversion chamber 204. A louvered partition 302 for extraction buffer and impurity filtering is fixedly connected between the intermediate transition chamber 209 and the primary diversion chamber 204.

[0022] The negative pressure component is used to separate water residue and dust in the intermediate transition chamber 209.

[0023] In the above embodiment, the mixed gas enters the intermediate transition chamber 209 under the action of the negative pressure component. Since the intermediate transition chamber 209 is arranged in parallel and has a certain length, and since the water vapor and dust in the mixed gas are relatively heavy, they gradually settle and fall during the flow in the intermediate transition chamber 209. At this time, the backwash nozzle 301 is started simultaneously, so that the settled water vapor and dust are flushed into the negative pressure component under the action of the backwash nozzle 301.

[0024] Specifically, the negative pressure component includes a secondary diversion chamber 303, which is fixedly connected to the end of the intermediate transition chamber 209. A secondary slag discharge port 304 is vertically fixedly connected to the bottom of the secondary diversion chamber 303, and a negative pressure port 305 for connecting a negative pressure pipeline is fixedly connected to the top of the secondary diversion chamber 303.

[0025] In the above embodiment, after water vapor and dust are flushed into the secondary diversion chamber 303, they can be discharged along the vertically arranged secondary slag discharge port 304 below it. At the same time, the gas is drawn into the negative pressure pipe connected to the negative pressure port 305, thereby ensuring the cleanliness of the negative pressure pipe and avoiding dust blockage.

[0026] Specifically, a gas sensor 306 for monitoring gas concentration is fixedly connected inside the intermediate transition chamber 209.

[0027] Specifically, butterfly valves 307 are fixedly installed on the primary slag discharge port 208, the secondary slag discharge port 304, and the slag discharge port 201, and the three butterfly valves 307 are controlled to open and close by the same host. The host is connected to the drilling rig and the electric ball valve, and the gas sensor 306 is connected to the host.

[0028] In the above embodiment, when the gas concentration is abnormally high, the gas sensor 306 on the intermediate transition chamber 209 feeds the signal back to the host, and the host cuts off the power to the drilling rig and opens the electric ball valve so that the sealed airbag 203 can be manually inflated by a hand-held air cylinder to seal the gap at the connection between the drill rod 308 and the blowout preventer 101, and closes all butterfly valves 307 to seal the gas in the blowout preventer 101 and the dust collection box, preventing it from entering the environment and preventing the safety hazards to the mine caused by gas outburst.

[0029] 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.

[0030] The term "fixed connection" as used in this application refers to a connection in which parts or components are fixed without any relative movement. This includes both detachable and non-detachable connections.

[0031] (1) Detachable connection: The components are fixed together using screws, splines, wedges, etc. This type of connection can be disassembled during maintenance without damaging the parts. However, the specifications of the connecting parts used must be correct (such as the length of the bolts, keys, wedges) and properly tightened.

[0032] (2) Non-removable connections: These mainly refer to welding, riveting, and tenon joints. Since disassembly requires forging, sawing, or oxyacetylene cutting for repair or replacement, the parts generally cannot be reused. At the same time, attention should be paid to process quality, technical inspection, and remedial measures (such as correction and polishing) during connection.

[0033] The sliding connection referred to in this application means that the component can slide along a linear trajectory, and the hinge referred to in this application means that the component can rotate along an axial constraint.

[0034] In some cases, the sliding connection and hinge referred to in this application may also be damped, enabling the component to maintain in the desired position.

[0035] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mine gas emission monitoring device for a mine drilling, characterized in that, The device includes a blowout preventer (101), a drill rod (308), and a dust suppression assembly. One end of the blowout preventer (101) is fixedly connected to an inclined slag discharge port (201). The drill rod (308) passes through the through holes on both sides of the blowout preventer (101). Sealed airbags (203) are provided at the through holes on both sides of the blowout preventer (101). An orifice spray head (202) is fixedly connected to the slag discharge port (201), and the orifice spray head (202) is perpendicular to the slag discharge port (201). The dust removal component is used to separate dust from methane gas.

2. The mine gas emission monitoring device according to claim 1, characterized in that, The dust suppression assembly includes a primary diversion chamber (204), a connector A (205), and a flushing assembly. The connector A (205) is obliquely and fixedly connected to the side wall of the primary diversion chamber (204), and the blowout shield (101) is inserted into the connector A (205) through the connector B (206) thereon. The flushing assembly is used to cause dust in the mixed gas to settle.

3. The mine gas emission monitoring device according to claim 2, characterized in that A spray head (207) is fixedly connected to the top of the inner wall of the primary diversion chamber (204), and a primary slag discharge port (208) is provided below the spray head (207). The primary slag discharge port (208) is vertically fixedly connected to the outer wall of the primary diversion chamber (204).

4. The mine gas emission monitoring device according to claim 2, characterized in that, The flushing assembly includes an intermediate transition chamber (209) and a negative pressure assembly. The intermediate transition chamber (209) is arranged parallel to the end of the primary diversion chamber (204), and a backwash nozzle (301) is fixedly connected to one end of the intermediate transition chamber (209) near the primary diversion chamber (204). A louvered partition (302) is fixedly connected between the intermediate transition chamber (209) and the primary diversion chamber (204). The negative pressure component is used to separate water slag and dust in the intermediate transition chamber (209).

5. The mine borehole gas emission monitoring device according to claim 4, characterized in that, The negative pressure assembly includes a secondary diversion chamber (303), which is fixedly connected to the end of the intermediate transition chamber (209), and a secondary slag discharge port (304) is vertically fixedly connected to the bottom of the secondary diversion chamber (303), and a negative pressure port (305) for connecting a negative pressure pipeline is fixedly connected to the top of the secondary diversion chamber (303).

6. The mine gas emission monitoring device according to claim 5, characterized in that A gas sensor (306) for monitoring gas concentration is fixedly connected inside the intermediate transition chamber (209).

7. The mine gas emission monitoring device according to claim 3, characterized in that, A butterfly valve (307) is fixedly installed on the primary slag discharge port (208), the secondary slag discharge port (304), and the slag discharge port (201).

8. The mine gas outflow monitoring device according to claim 7, characterized in that The three butterfly valves (307) are controlled to open and close by the same host unit.

Images