Mining gas collector

Abstract

The utility model relates to the technical field of mining equipment, in particular to a mining gas collector which comprises a main pipeline and a branch pipeline, the branch pipeline can extract gas in a coal seam and inject the gas into the main pipeline, and the gas is conveyed to the ground through the main pipeline. The main pipeline is composed of a plurality of collecting pipes, the butt flanges are arranged at the two ends of each collecting pipe respectively, the adjacent collecting pipes are connected together through the butt flanges, through the design of the structure, the butt flanges can increase the contact area between the collecting pipes, and the good sealing effect is achieved; a plurality of branch pipe connecting ports are formed in the peripheral side wall of the collecting pipe in the axis direction, the collecting pipe can be detachably connected with connector pipes of branch pipelines through the branch pipe connecting ports, and through the design of the structure, the flexibility of the branch pipelines in the laying process is improved; through the design of the mechanism, the mechanism has the advantages of light structure, good sealing effect and the like, and daily installation and maintenance are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of mining equipment, and more specifically, to a mine gas collector. Background Art

[0002] During the coal mining process, the presence of gas poses a great safety hazard to coal mining. Gas is mainly composed of coalbed methane and is a toxic and harmful gas mainly composed of methane. The presence of gas poses a great safety hazard to coal mining because it may cause gas explosions and outburst accidents. Therefore, gas drainage has become an important measure to reduce the gas emission during mining and prevent gas overrun and accumulation.

[0003] In the existing mining industry, gas collectors are usually used for gas drainage. A gas collector is a device used in a coal mine gas drainage system, mainly used to collect and discharge gas in coal mines. Existing gas collectors usually consist of several main pipelines and branch pipelines. To improve the sealing effect of the gas collector, the main pipeline is usually made of a metal pipeline with a length exceeding 10m, and the sealing performance is improved by reducing the interfaces. However, due to its large weight and volume, the existing main pipeline is not convenient for installation and daily maintenance. In addition, to prevent corrosion, the existing gas collector has high requirements for waterproofing, resulting in high requirements for the installation environment. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a mine gas collector, which is light in structure, good in sealing effect, and convenient for daily installation and maintenance.

[0005] A mine gas collector according to an embodiment of the utility model includes:

[0006] A main pipeline, which is composed of a plurality of collecting pipes spliced in sequence; both ends of the collecting pipe are open and are respectively provided with docking flanges, and a plurality of branch pipe connection ports are arranged on the circumferential side wall of the collecting pipe along the axial direction; external threads are arranged on the branch pipe connection ports.

[0007] A branch pipeline, a joint pipe is provided corresponding to each branch pipe connection port, and the joint pipe is threadedly connected with the branch pipe connection port; a sampling hole is arranged on the joint pipe, and a plug is arranged on the sampling hole.

[0008] According to some embodiments of the utility model, the docking flange is provided with a sealing groove, a sealing ring is arranged in the sealing groove, and the docking flanges of adjacent collecting pipes are connected together by fastening bolts.

[0009] According to some embodiments of the utility model, the collecting pipe is made of polyethylene.

[0010] According to some embodiments of the present utility model, the length of the manifold is L, where 3.5 m ≤ L ≤ 4.5 m.

[0011] According to some embodiments of the present utility model, an optical fiber sensor is arranged along the axial direction of the manifold in the main pipeline.

[0012] According to some embodiments of the present utility model, the branch pipeline includes a ball valve and an extraction pipe. The ball valve is arranged on the joint pipe, and the joint pipe is communicated with the extraction pipe.

[0013] According to some embodiments of the present utility model, the plug includes a quick connector, a quick sleeve and a flexible band. One end of the flexible band is fixedly connected to the quick connector, and the other end of the flexible band is fixedly connected to the quick sleeve. The quick connector is fixedly arranged on the sampling hole, and an exhaust hole is arranged on the quick connector and is communicated with the sampling hole. The quick sleeve is detachably connected to the quick connector. Under normal conditions, the quick sleeve is sleeved on the quick connector, and during sampling detection, the quick sleeve and the quick connector are separated.

[0014] According to some embodiments of the present utility model, a plurality of annular protrusions are arranged on the outer peripheral wall of the quick connector, and the diameter of the outer edge of the annular protrusion gradually decreases outward along the axial direction of the quick connector. A corresponding annular groove is arranged on the inner peripheral wall of the quick sleeve for each annular protrusion.

[0015] According to some embodiments of the present utility model, the main pipeline includes a gas-liquid separation mechanism. The gas-liquid separation mechanism is provided with a separation cylinder. An air inlet pipe and an air outlet pipe are respectively arranged on the side wall of the separation cylinder, and a drain pipe is arranged at the bottom of the separation cylinder. The air inlet pipe is communicated with the manifold at the end.

[0016] According to some embodiments of the present utility model, the separation cylinder is of a conical structure, and the axis of the air inlet pipe is tangent to the inner side wall of the separation cylinder.

[0017] A mine gas collector according to an embodiment of the present utility model has at least the following beneficial effects:

[0018] According to the solution of the present utility model, a mine gas collector includes a main pipeline and branch pipelines. Among them, the branch pipelines can extract gas from the coal seam and inject the gas into the main pipeline. The gas is transported to the ground through the main pipeline. In this solution, the main pipeline is composed of multiple collector pipes. Docking flanges are respectively arranged at both ends of the collector pipes, and adjacent collector pipes are connected together through the docking flanges. Through the design of this structure, the docking flanges can increase the contact area between the collector pipes and have a good sealing effect; a plurality of branch pipe connection ports are arranged on the circumferential side wall of the collector pipe along the axial direction, and the branch pipelines can be detachably connected to the joint pipes through the branch pipe connection ports. Through the design of this structure, the flexibility of the layout of the branch pipelines is improved; in addition, sampling holes are arranged on the joint pipes, and the gas concentration in the branch pipelines can be monitored in real time through the sampling holes. By judging the gas concentration, the gas distribution in the coal seam can be judged, so as to facilitate the construction personnel to adjust the layout of the branch pipelines. Through the design of this mechanism, it has the advantages of light weight and good sealing effect, and is convenient for daily installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of one embodiment of the present utility model;

[0020] Figure 2 is a schematic three-dimensional assembly structural diagram of the present utility model;

[0021] Figure 3 is a schematic structural diagram of a gas-liquid separation mechanism of the present utility model;

[0022] Figure 4 is a schematic structural diagram of a plug of the present utility model.

[0023] In the figure:

[0024] 100 - main pipeline, 110 - collector pipe, 120 - docking flange, 121 - sealing groove, 130 - branch pipe connection port, 140 - sealing ring, 150 - fastening bolt, 160 - fiber optic sensor;

[0025] 200 - branch pipeline, 210 - joint pipe, 211 - sampling hole, 220 - ball valve, 230 - suction pipe;

[0026] 300 - plug, 310 - quick connector, 311 - exhaust hole, 312 - annular protrusion, 320 - quick sleeve, 321 - annular groove, 330 - flexible band;

[0027] 400 - gas-liquid separation mechanism, 410 - separation cylinder, 411 - inlet pipe, 412 - outlet pipe, 413 - drain pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0029] In the description of the present utility model, it should be understood that with respect to the orientation description, such as up, down, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0030] In the description of the present utility model, "a plurality" refers to more than two. If there is a description of the first and the second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0031] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0032] Referring to Figures 1 to 4 As shown, the present utility model discloses a mine gas collector. The mine gas collector includes a main pipeline 100 and branch pipelines 200. Among them, the main pipeline 100 is composed of a plurality of collecting pipes 110 spliced in sequence; both ends of the collecting pipe 110 are open and are respectively provided with docking flanges 120, and a plurality of branch pipe connection ports 130 are arranged on the peripheral side wall of the collecting pipe 110 along the axial direction; the branch

[0033] The pipe connection port 130 is provided with an external thread; for each branch pipe connection port 130 of the branch pipeline 200, a joint pipe 210 is provided, and the joint pipe 210 is threadedly connected to the branch pipe connection port 130; a sampling hole 211 is provided on the joint pipe 210, and a plug 300 is provided on the sampling hole 211. Specifically, in this embodiment, the branch pipeline 200 can extract the gas in the coal seam and inject the gas into the main pipeline 100, and the gas is transported to the ground through the main pipeline 100. In this embodiment, the main pipeline 100 is composed of a plurality of manifold pipes 110, and butt flanges 120 are respectively provided at both ends of the manifold pipe 110, and adjacent manifold pipes 110 are connected together through the butt flanges 120. Through the design of this structure, the butt flange 120 can increase the contact area between the manifold pipes 110 and has a good sealing effect; a plurality of branch pipe connection ports 130 are provided on the circumferential side wall of the manifold pipe 110 along the axial direction, and the joint pipe 210 of the branch pipeline 200 can be detachably connected through the branch pipe connection port 130. At the position where the branch pipeline 200 needs to be installed, the branch pipeline 200 can be quickly connected directly through the external thread on the branch pipe connection port 130. At the position where the branch pipeline 200 does not need to be provided, the branch pipe connection port 130 can be directly sealed by a threaded end cap; through the design of this structure, the flexibility of the branch pipeline 200 during layout is improved. In addition, a sampling hole 211 is provided on the joint pipe 210, and the gas concentration in the branch pipeline 200 can be monitored in real time through the sampling hole 211. By judging the gas concentration, the gas distribution in the coal seam can be judged, so as to facilitate the construction personnel to adjust the layout of the branch pipeline 200. Through the design of this mechanism, it has the advantages of light structure and good sealing effect, and is convenient for daily installation and maintenance.

[0034] In some embodiments of the present utility model, the butt flange 120 is provided with a sealing groove 121, a sealing ring 140 is provided in the sealing groove 121, and the butt flanges 120 of adjacent manifold pipes 110 are connected together through fastening bolts 150. In this embodiment, adjacent manifold pipes 110 are fixed together through the butt flanges 120, and the butt flange 120 is provided with a sealing groove 121. By installing the sealing ring 140 in the sealing groove 121, the sealing effect of the connection can be improved, thereby reducing the machining accuracy of the end face of the butt flange 120 and saving the cost of the main pipe.

[0035] In some embodiments of the present utility model, the manifold pipe 110 is made of polyethylene. In this embodiment, polyethylene has good chemical stability, low-temperature resistance, electrical insulation performance and good processing performance; at the same time, polyethylene has small water absorption and has good waterproof and moisture-proof effects. The manifold pipe 110 made of polyethylene is suitable for operating in the environment of underground mines, and the weight of a single manifold pipe 110 is light, which is convenient for transportation and installation, and improves the convenience of daily maintenance and repair.

[0036] In some embodiments of the present utility model, the length of the manifold 110 is L, where 3.5 m ≤ L ≤ 4.5 m. In this embodiment, the main pipeline 100 is composed of a plurality of manifolds 110 spliced in sequence; both ends of the manifold 110 are open and are respectively provided with docking flanges 120. The docking flanges 120 are provided with sealing grooves 121, and sealing rings 140 are arranged in the sealing grooves 121. The docking flanges 120 of adjacent manifolds 110 are connected together by fastening bolts 150. By providing the sealing grooves 121 on the docking flanges 120 and configuring the sealing rings 140 in the sealing grooves 121, the tightness of the connection between adjacent manifolds 110 can be ensured. Therefore, in this embodiment, the manifolds 110 can be spliced with shorter lengths, which is convenient for the transportation or installation of the manifolds 110. Additionally, in this embodiment, the manifolds 110 can adopt a standard pitch of 4 m. Through the design of this structure, it can be quickly erected even in a complex underground environment. Compared with the long pipelines made of some metals that need to be customized, this mechanism has good industrial practicability.

[0037] In some embodiments of the present utility model, an optical fiber sensor 160 is arranged axially along the manifold 110 inside the main pipeline 100. In this embodiment, since the main component of gas is methane, which is a non-toxic, odorless, colorless, and flammable gas. The optical fiber sensing technology can be used to monitor the gas concentration inside the main pipeline 100 in real time, with high sensitivity and real-time controllable monitoring. Specifically, the optical fiber sensor 160 will receive the optical signal from the light source, and then these optical signals will propagate in the sensor and encounter the gas to be measured. Finally, the sensor converts the detected gas concentration change into an electrical signal and analyzes and displays it through the data processing system. Through the design of this structure, it can cooperate with the data value of the sampling hole 211 on the joint pipe 210 to judge the gas distribution in the coal seam and whether there is a gas leakage problem in the main pipeline 100 or the branch pipeline 200. Specifically, when the gas data at the sampling hole 211 is greater than the increment of the gas data collected by the optical fiber sensor 160 at that location, it indicates that the main pipeline 100 may have a leakage; when the gas data at the sampling hole 211 is less than the increment of the gas data collected by the optical fiber sensor 160 at that location, it indicates that the branch pipeline 200 may have a leakage. Through the design of this mechanism, the safety performance is good.

[0038] In some embodiments of the present utility model, the branch pipeline 200 includes a ball valve 220 and an extraction pipe 230. The ball valve 220 is arranged on the joint pipe 210, and the joint pipe 210 is communicated with the extraction pipe 230. In this embodiment, the branch pipeline 200 is provided with a ball valve 220, and the opening and closing of the joint pipe 210 can be controlled through the ball valve 220. By providing the extraction pipe 230, the gas in the coal seam can be extracted.

[0039] In some embodiments of the present utility model, the plug 300 includes a quick connector 310, a quick sleeve 320, and a flexible belt 330. One end of the flexible belt 330 is fixedly connected to the quick connector 310, and the other end of the flexible belt 330 is fixedly connected to the quick sleeve 320. The quick connector 310 is fixedly arranged on the sampling hole 211, and an exhaust hole 311 is arranged on the quick connector 310. The exhaust hole 311 communicates with the sampling hole 211. The quick sleeve 320 is detachably connected to the quick connector 310. Under normal conditions, the quick sleeve 320 is sleeved on the quick connector 310. During sampling detection, the quick sleeve 320 and the quick connector 310 are separated. Through the design of this structure, it is convenient to quickly enter the sampling device for sampling operation.

[0040] In some embodiments of the present utility model, a plurality of annular protrusions 312 are arranged on the outer peripheral wall of the quick connector 310, and the diameter of the outer edge of the annular protrusions 312 gradually decreases outward along the axial direction of the quick connector 310. A corresponding annular groove 321 is arranged on the inner peripheral wall of the quick sleeve 320 for each annular protrusion 312. In this embodiment, a sampling hole 211 is arranged on the joint pipe 210, and a plug 300 is arranged on the sampling hole 211. The plug 300 includes a quick connector 310, a quick sleeve 320, and a flexible belt 330. One end of the flexible belt 330 is fixedly connected to the quick connector 310, and the other end of the flexible belt 330 is fixedly connected to the quick sleeve 320. Under normal conditions, that is, when gas sampling is not required, the quick sleeve 320 is sleeved on the quick connector 310. Through the cooperation of a plurality of annular grooves 321 and annular protrusions 312, the sealing ability of the exhaust hole 311 can be improved.

[0041] In some embodiments of the present utility model, the main pipeline 100 includes a gas-liquid separation mechanism 400. The gas-liquid separation mechanism 400 is provided with a separation cylinder 410. An air inlet pipe 411 and an air outlet pipe 412 are respectively arranged on the side wall of the separation cylinder 410, and a drain pipe 413 is arranged at the bottom of the separation cylinder 410. The air inlet pipe 411 communicates with the manifold 110 at the end. Specifically, in this embodiment, the gas-liquid separation mechanism 400 can be arranged on the main pipeline 100 at a certain interval, or can be arranged at the end of the main pipeline 100. In this embodiment, there may be a certain amount of liquid inhaled during the process of extracting gas. In order to remove the liquid, in this embodiment, by arranging the separation cylinder 410, gas-liquid separation can be carried out, so as to obtain relatively pure gas while discharging the excess liquid.

[0042] In some embodiments of the present utility model, the separation cylinder 410 is of a conical structure, and the axis of the air inlet pipe 411 is tangent to the inner side wall of the separation cylinder 410. Specifically, in this embodiment, the coal seam gas enters the separation cylinder 410 through the main pipe 100. Specifically, it enters the separation cylinder 410 along the tangential direction of the separation cylinder 410 through the air inlet pipe 411. The coal seam gas forms a cyclone in the separation cylinder 410. Under the action of gravity, the gas is transported to the ground through the gas outlet pipe 412, and the liquid is collected through the drain pipe 413. Through the design of this mechanism, the structure is simple and the gas-liquid separation effect is good.

[0043] The above has described the embodiments of the present utility model in detail with reference to the drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present utility model.

Claims

1. A mine gas collector, characterized in that, Including: A main pipeline (100) which is composed of a plurality of manifold pipes (110) spliced in sequence; both ends of the manifold pipe (110) are open and are respectively provided with docking flanges (120), and a plurality of branch pipe connection ports (130) are arranged on the peripheral side wall of the manifold pipe (110) along the axial direction; external threads are provided on the branch pipe connection ports (130). Branch pipelines (200), one joint pipe (210) is provided corresponding to each branch pipe connection port (130), and the joint pipe (210) is threadedly connected to the branch pipe connection port (130); a sampling hole (211) is provided on the joint pipe (210), and a plug (300) is provided on the sampling hole (211).

2. The mine gas collector according to claim 1, characterized in that, The docking flange (120) is provided with a sealing groove (121), a sealing ring (140) is arranged in the sealing groove (121), and the docking flanges (120) of adjacent manifold pipes (110) are connected together by fastening bolts (150).

3. The mine gas collector according to claim 2, characterized in that, The manifold pipe (110) is made of polyethylene.

4. The mine gas collector according to claim 3, characterized in that, The length of the manifold pipe (110) is L, where 3.5m ≤ L ≤ 4.5m.

5. The mine gas collector according to claim 4, characterized in that, An optical fiber sensor (160) is arranged in the main pipeline (100) along the axial direction of the manifold pipe (110).

6. The mine gas collector according to claim 1, characterized in that, The branch pipeline (200) includes a ball valve (220) and an air extraction pipe (230), the ball valve (220) is arranged on the joint pipe (210), and the joint pipe (210) is communicated with the air extraction pipe (230).

7. The mine gas collector according to claim 6, characterized in that, The plug (300) includes a quick connector (310), a quick sleeve (320) and a flexible belt (330), one end of the flexible belt (330) is fixedly connected to the quick connector (310), and the other end of the flexible belt (330) is fixedly connected to the quick sleeve (320); the quick connector (310) is fixedly arranged on the sampling hole (211), an exhaust hole (311) is arranged on the quick connector (310), and the exhaust hole (311) is communicated with the sampling hole (211); the quick sleeve (320) is detachably connected to the quick connector (310); under normal conditions, the quick sleeve (320) is sleeved on the quick connector (310), and during sampling detection, the quick sleeve (320) is separated from the quick connector (310).

8. The mine gas collector according to claim 7, characterized in that, A plurality of annular protrusions (312) are arranged on the outer peripheral wall of the quick connector (310), and the diameter of the outer edge of the annular protrusions (312) gradually becomes smaller along the axial direction of the quick connector (310); a corresponding annular groove (321) is arranged on the inner peripheral wall of the quick sleeve (320) for each annular protrusion (312).

9. The mine gas collector according to claim 1, characterized in that, The main pipeline (100) includes a gas-liquid separation mechanism (400). The gas-liquid separation mechanism (400) is provided with a separation cylinder (410). An air inlet pipe (411) and an air outlet pipe (412) are respectively arranged on the side wall of the separation cylinder (410). A drain pipe (413) is arranged at the bottom of the separation cylinder (410). The air inlet pipe (411) is communicated with the manifold (110) located at the end.

10. The mine gas collector according to claim 9, characterized in that, The separation cylinder (410) is of a conical structure, and the axis of the air inlet pipe (411) is tangent to the inner side wall of the separation cylinder (410).

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