Gas extraction drilling receiving and extracting system

Abstract

The utility model discloses a gas extraction drilling receiving and extracting system, which comprises an extraction pipeline, a drainage deslagging pipeline and an interconnection tee joint, the extraction pipeline is positioned at the upper part of a roadway, the far end of the extraction pipeline is converged into a mine extraction main system, a first joint matched with an extraction hose is reserved at the tail end of the extraction pipeline, and the drainage deslagging pipeline is positioned at the lower part of the roadway; wherein one end of the pipe body is connected with an extraction pipeline through an extraction hose and provided with a first gate valve, the other end of the pipe body is connected with an extraction hose with a proper length, a third gate valve and a fourth gate valve are additionally arranged at the two ends of the extraction hose, and a second connector and a second gate valve which are matched with the extraction hose are arranged on the pipe body. The interconnection tee joint is an equal-diameter tee joint matched with the extraction hose, and the drilling hole sealing pipe, the first connector of the extraction pipeline and the second connector of the drainage deslagging pipeline are connected through the extraction hose. Synchronous operation of gas extraction, water drainage, slag removal and drilling dredging is achieved, the stability of an extraction system and the drilling utilization rate are greatly improved, and meanwhile the maintenance cost and potential safety hazards are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mine underground gas extraction, in particular to a gas extraction drilling hole connection and extraction system. BACKGROUND

[0002] The existing gas extraction drilling hole connection and extraction mode usually uses a hose to connect a drilling hole sealing pipe and a reserved joint on an extraction pipeline and fasten at the joint by iron wire or a tightener, which is simple in operation and convenient to realize, but has many problems, such as water and coal slag in the drilling hole entering the extraction pipeline along with the connection and extraction hose, which easily causes problems such as pipeline water accumulation and system resistance increase, and even when the extraction pipeline is blocked, the extraction and drainage deslagging cannot be performed synchronously, in which case the extraction negative pressure has to be disconnected for drilling hole processing, but the drilling hole is extremely prone to gas safety accidents caused by uncontrollable gas overflow in the absence of negative pressure, which has great safety hazards. SUMMARY

[0003] In order to solve the problem that the extraction and drainage deslagging cannot be performed synchronously in the existing drilling hole connection and extraction mode, the utility model provides a gas extraction drilling hole connection and extraction system.

[0004] The utility model adopts the following technical scheme: a gas extraction drilling hole connection and extraction system, comprising an extraction pipeline, a drainage deslagging pipeline and an interconnection tee, the extraction pipeline provides external power for drilling hole gas extraction, is located at the upper part of a roadway, the distal end is connected to a mine extraction main system, and the terminal end has a first joint matched with the diameter of an extraction hose and meeting the number of connected and extracted drilling holes; the drainage deslagging pipeline is a storage and discharge device for water and coal slag in the daily drilling hole extraction process, is located at the lower part of the roadway, one end is connected to the extraction pipeline through an extraction hose and is provided with a first gate valve, the other end is connected to an extraction hose with appropriate length, and the two ends of the extraction hose are provided with a third gate valve and a fourth gate valve; a pipe body is provided with a second joint matched with the diameter of the extraction hose and meeting the number of connected and extracted drilling holes and a second gate valve; and the interconnection tee is an equal-diameter tee matched with the diameter of the extraction hose, the first joint of the drilling hole sealing pipe, the extraction pipeline and the second joint of the drainage deslagging pipeline are connected through the extraction hose.

[0005] Further, the interconnection tee is a T-shaped tee, the middle joint is connected to the first joint, and the two side joints are connected to the second joint and the drilling hole sealing pipe respectively.

[0006] Further, the extraction pipeline and the drainage deslagging pipeline are hung in the roadway through a steel wire rope.

[0007] Further, the extraction hose is fastened at the joint with the pipeline by iron wire or a tightener.

[0008] Further, the drainage deslagging pipeline is a hard metal pipeline with tight sealing.

[0009] The gas extraction drilling hole connection and extraction system has the following beneficial effects compared with the traditional drilling hole connection and extraction mode:

[0010] 1. The interconnection of the three-way pipe provides an independent hole dredging channel for the drilling hole, and in the extraction process, the gas, liquid and solid dregs can be automatically separated according to the principle of "gas goes to high places and water flows to low places", realizing simultaneous gas extraction and drilling hole dredging, avoiding the hole blocking problem caused by the unsynchronized extraction and drainage of dregs in the traditional mode, and improving the effective extraction time and extraction efficiency of the drilling hole.

[0011] 2. The extraction pipeline and the drainage and dregs removal pipeline operate independently and do not interfere with each other, so that the extraction system can always maintain a stable negative pressure environment during normal operation, reducing the problem of reduced extraction efficiency caused by impurity accumulation. At the same time, the existence of the hole dredging channel enables the drilling hole to be quickly dredged after being blocked, reducing the need for manual disassembly of the extraction equipment and reducing the maintenance workload.

[0012] 3. The disconnected end of the interconnection three-way pipe can be used as a manual dredging channel under normal extraction conditions, enabling the accumulated water and coal dregs in the drilling hole to be smoothly discharged, reducing the blocking phenomenon, improving the utilization rate of the drilling hole, prolonging the effective service life of the drilling hole, and further improving the gas extraction efficiency.

[0013] 4. The system can flexibly adjust the connection and extraction mode according to the number of drilling holes and the roadway environment, making the operation of the extraction pipeline and the drainage and dregs removal pipeline more efficient, avoiding the impact on safety production caused by blocked gas extraction or drilling hole blockage. Through efficient drainage, dredging and extraction, the risk of gas accumulation is reduced, and the safety of underground operation in coal mines is improved.

[0014] In summary, the present utility model breaks through the limitations of the prior art, innovatively realizes simultaneous operation of gas extraction, drainage and dregs removal and drilling hole dredging, greatly improves the stability of the extraction system and the utilization rate of the drilling hole, while reducing maintenance costs and safety hazards, and has wide application value and promotion prospects. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic view of the present utility model;

[0016] Figure 2 is a structural schematic view of the present utility model when dredging a drilling hole.

[0017] In the figure: 1, extraction pipeline; 11, first joint; 12, steel wire rope; 2, drainage and slag removal pipeline; 21, first gate valve; 22, second joint; 23, second gate valve; 24, third gate valve; 3, interconnection tee; 4, borehole sealing pipe; 5, tightener; 6, fourth gate valve; 7, extraction hose; 8, borehole cleaning tool; 9, coal slag; 10, water. DETAILED DESCRIPTION

[0018] In order to better understand the purpose, structure and function of the utility model, the utility model of a gas extraction borehole connection extraction system will be further described in detail below in combination with the drawings.

[0019] As shown in the figure, a gas extraction borehole connection extraction system comprises an extraction pipeline 1, a drainage and slag removal pipeline 2 and an interconnection tee 3. Figure 1 The extraction pipeline 1 is a Φ355mm hard metal pipeline with airtight sealing and is connected by roots, is hung by a Φ8mm steel wire rope 12 at a position 500mm away from the roof and the side of the roadway, the distal end is merged into the main system of mine extraction, and the terminal end has a first joint 11 with a diameter matched with the extraction hose 7 and satisfying the number of connected extraction boreholes, thereby providing sufficient external power for borehole gas extraction.

[0020] The drainage and slag removal pipeline 2 is a Φ160mm hard metal pipeline with airtight sealing, is hung by a Φ8mm steel wire rope (not shown in the figure) at a position 500mm away from the bottom and the side of the roadway, has a second joint 22 and a second gate valve 23 with a diameter matched with the extraction hose 7 and satisfying the number of connected extraction boreholes installed on the pipeline body, one end is connected with the extraction pipeline 1 through a Φ100mm extraction hose 7 and has a first gate valve 21 installed, the other end is connected with a Φ160mm extraction hose 7 with a proper length, and the extraction hose 7 has a third gate valve 24 and a fourth gate valve 6 with a diameter matched with the pipeline diameter installed at both ends of the extraction hose 7, thereby being used for storing and discharging water and coal slag.

[0021] The interconnection tee 3 is an equal-diameter T-shaped tee with a diameter matched with the extraction hose 7, the middle joint is connected with the first joint 11 of the extraction pipeline 1 through the extraction hose 7, the two side joints are connected with the borehole sealing pipe 4 and the second joint 22 of the drainage and slag removal pipeline 2 respectively, and the joints are fastened by using iron wires or tighteners 5, thereby ensuring airtightness and preventing gas leakage.

[0022] Under normal extraction conditions, the gas, water and slag mixture is poured into the borehole orifice along the borehole sealing pipe 4 under the action of extraction negative pressure, and follows the principle that gas goes to high places and water flows to low places, the gas enters the extraction pipeline 1, the coal slag 9 and the water 10 enter the drainage and slag removal pipeline 2, and the extraction pipeline 1 and the drainage and slag removal pipeline 2 operate independently and do not interfere with each other.

[0023] As shown in the figure, a gas extraction borehole connection extraction system comprises an extraction pipeline 1, a drainage and slag removal pipeline 2 and an interconnection tee 3.

[0024] Figure 2 ​When the hole collapse and hole blockage phenomenon occurs and the hole needs to be dredged manually, the interconnection tee 3 is disconnected from the drainage and residue removal pipeline 2 and the corresponding second gate valve 23 on the drainage and residue removal pipeline 2 is closed, the disconnected end of the interconnection tee 3 becomes a channel for manually dredging the hole, and the manual hole dredging tool 8 enters the hole through the disconnected end of the interconnection tee 3 to drill and dredge the hole, at this time, the extraction pipeline 1 is in normal operation, and gas enters the extraction pipeline 1 under the action of negative pressure, thereby achieving the purpose of simultaneous extraction and hole dredging, avoiding uncontrolled overflow to the working space, and eliminating gas safety accidents.

[0025] It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. A gas extraction borehole tapping system, characterized by It comprises a pumping pipeline (1), a drainage pipeline (2) and an interconnection tee (3). The pumping pipeline (1) provides external power for drilling gas pumping and is located at the upper part of the roadway, with the distal end connected to the main system of the mine pumping and the terminal end provided with a first joint (11) matching the diameter of the pumping hose (7) and meeting the number of connected drilling holes. The drainage pipeline (2) is a storage and discharge device for water and coal residue in the daily drilling and pumping process, which is located at the lower part of the roadway, with one end connected to the pumping pipeline (1) through the pumping hose (7) and installed with a first gate valve, the other end connected with a pumping hose (7) of appropriate length, and the two ends of the pumping hose (7) installed with a third gate valve (24) and a fourth gate valve (6). The pipeline body is installed with a second joint (22) and a second gate valve (23) matching the diameter of the pumping hose (7) and meeting the number of connected drilling holes. The interconnection tee (3) is an equal-diameter tee matching the diameter of the pumping hose (7), which connects the drilling hole sealing pipe (4), the first joint (11) of the pumping pipeline (1) and the second joint (22) of the drainage pipeline (2) through the pumping hose (7).

2. The gas extraction borehole tapping system according to claim 1, characterized in that The interconnection tee (3) is a T-shaped tee, with the middle interface connected to the first joint (11) and the two side interfaces connected to the second joint (22) and the drilling hole sealing pipe (4) respectively.

3. The gas extraction borehole tapping system of claim 1, wherein, The pumping pipeline (1) and the drainage pipeline (2) are hung in the roadway by a steel wire rope (12).

4. The gas extraction borehole tapping system of claim 1, wherein, The pumping hose (7) is fastened at the pipeline joint by iron wire or a tightener (5).

5. The gas extraction borehole connection system according to any one of claims 1 to 4, characterized in that The drainage pipeline (2) is a hard metal pipeline with airtight seal.

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