Flexible flame-retardant pressure-resistant corrosion-resistant pipeline for gas extraction in goaf

Abstract

The utility model discloses a flexible flame-retardant pressure-resistant corrosion-resistant pipeline for goaf gas extraction, which comprises a plurality of sections of gas extraction pipelines and a protection box, a gas inlet of each section of gas extraction pipeline is respectively provided with a filter, a gas outlet of each section of gas extraction pipeline is arranged in the protection box, each gas extraction pipeline comprises an inner layer, a middle layer and an outer layer, the inner layer is a rubber hose, and the middle layer is a rubber hose. The middle layer is a steel wire mesh pipe and the outer layer is a flame-retardant corrosion-resistant hose. According to the utility model, the goaf gas taking pipeline is formed by multiple sections of gas extraction pipelines and the protection box, and a gas extraction beam tube does not need to be arranged in a penetrating manner, so that the device cost and the field arrangement difficulty are reduced, and the working efficiency is greatly improved; the air exhaust pipeline is made of the inner-layer rubber hose, the middle-layer steel wire mesh pipe and the outer-layer flame-retardant silica gel pipe, the strength of the air exhaust pipeline is improved through the steel wire mesh pipe, the flame-retardant silica gel pipe has good high temperature resistance and corrosion resistance, and combustion breakage in the using process is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas collection pipelines in mined - out areas of mines, and relates to a flexible, flame - retardant, pressure - resistant and corrosion - resistant pipeline for gas extraction in mined - out areas. Background Technique

[0002] During the normal coal mining period of a mine working face, in order to ensure that there is no spontaneous combustion risk for the floating coal in the mined - out area of the working face, it is necessary to demarcate the "three zones" of coal spontaneous combustion, namely the heat - dissipation zone, the oxidation and temperature - rising zone, and the asphyxiation zone. In order to judge the range of the spontaneous combustion dangerous area in the mined - out area and formulate and implement targeted prevention and control measures, it is necessary to extract and detect the gas in the mined - out area.

[0003] Due to the complex environment in the mined - out area, conventional gas collection pipelines will break and corrode under the influence of mine pressure and other factors.

[0004] Conventional gas collection pipelines in mined - out areas usually use steel pipes and high - pressure rubber hoses as the air - extraction pipelines. Then, the air - extraction bundle pipes are inserted inside the air - extraction pipelines to protect the air - extraction bundle pipes, and then air is extracted through the air - extraction bundle pipes, which increases the device cost and the difficulty of on - site device layout. Content of the Utility Model

[0005] The purpose of the utility model is to provide a flexible, flame - retardant, pressure - resistant and corrosion - resistant pipeline for gas extraction in mined - out areas, which solves the problems that the existing gas collection pipelines in mined - out areas insert the air - extraction bundle pipes inside the air - extraction pipelines, increasing the device cost and the difficulty of on - site layout.

[0006] The technical solution adopted by the utility model is that the flexible, flame - retardant, pressure - resistant and corrosion - resistant pipeline for gas extraction in mined - out areas includes multiple sections of air - extraction pipelines and a protection box. Filters are respectively installed at the air - intake ports of each section of the air - extraction pipeline, and the air - outlet ports of each section of the air - extraction pipeline are arranged inside the protection box. The air - extraction pipeline includes an inner layer, a middle layer and an outer layer. The inner layer is a rubber hose, the middle layer is a steel wire mesh tube, and the outer layer is a flame - retardant and corrosion - resistant hose.

[0007] The filter is composed of a mesh cover and a mounting seat. The mounting seat is a hollow cylinder, one end is fixedly connected to the mesh cover, and the other end is connected to the air - intake port of the air - extraction pipeline.

[0008] The filter is connected to the air - intake port of the air - extraction pipeline through an internal thread joint.

[0009] A bladder is separately connected to the air - outlet port of each air - extraction pipeline.

[0010] The air - outlet port of the air - extraction pipeline is sequentially connected to a stainless - steel vacuum joint, a vacuum valve, a pneumatic pressure hose, an air - extraction pump and a bladder.

[0011] The protection box includes a rectangular shell with an open top and a box cover. The rectangular shell and the box cover are fixedly connected through a hinge. A partition is arranged inside the rectangular shell and is located between the air - intake ports of adjacent air - extraction pipelines.

[0012] A rubber gasket is provided at the junction of the air extraction pipeline and the protection box.

[0013] It includes three sections of air extraction pipelines.

[0014] The wire mesh pipe is made of four layers of intertwined wire meshes.

[0015] The flame-retardant and corrosion-resistant hose is a flame-retardant silica gel hose.

[0016] The beneficial effects of the present utility model are as follows: An air extraction pipeline for gob gas extraction is made of multiple sections of air extraction pipelines and a protection box, eliminating the need to lay air extraction bundle tubes, reducing the device cost and the difficulty of on-site layout, and greatly improving the work efficiency; the air extraction pipeline is composed of an inner rubber hose, a middle wire mesh pipe, and an outer flame-retardant silica gel hose. The wire mesh pipe enhances the strength of the air extraction pipeline, and the flame-retardant silica gel hose has good high-temperature resistance and corrosion resistance, avoiding combustion and fracture during use; the air inlets of multiple sections of air extraction pipelines are placed at different positions in the gob to collect gases from different depths of the gob. After the working face is mined, as the gob continuously deepens, the gases collected from the gob at the same depth can be compared and analyzed to select the optimal gas data. Description of the Drawings

[0017] Figure 1 is the structural diagram of the flexible flame-retardant, pressure-resistant, and corrosion-resistant pipeline for gob gas extraction of the present utility model;

[0018] Figure 2 is the cross-sectional schematic diagram of the air extraction pipeline in the flexible flame-retardant, pressure-resistant, and corrosion-resistant pipeline for gob gas extraction of the present utility model.

[0019] In the figure, 1. Air extraction pipeline, 1-1. Inner layer, 1-2. Middle layer, 1-3. Outer layer, 2. Filter, 2-1. Mesh cover, 2-2. Mounting seat, 3. Protection box, 3-1. Rectangular housing, 3-2. Partition, 4. Rubber gasket, 5. Stainless steel vacuum joint, 6. Female thread joint. Detailed Implementation Modes

[0020] The present utility model will be described in detail below in conjunction with the drawings and specific implementation modes.

[0021] Embodiment 1

[0022] A flexible flame-retardant, pressure-resistant, and corrosion-resistant pipeline for gob gas extraction, referring to Figure 1 and Figure 2 , includes three sections of air extraction pipelines 1 and a protection box 3. A filter 2 is installed at the air inlet of each section of the air extraction pipeline 1, which can filter out most of the dust impurities in the gob, ensuring the purity of the extracted gas, preventing blockage of the air extraction pipeline, and increasing the service life of the device.

[0023] The air outlets of the three-section air extraction pipeline 1 are all arranged inside the protection box 3. The protection box 3 is fixed on the coal wall anchor net and is used to identify and protect the air outlets of the three-section air extraction pipeline 1.

[0024] During use, it is installed by sticking to the wall, passing through the intake and return air roadways, and gradually extending to the goaf as the working face advances. The intake ports of different air extraction pipelines 1 are placed at different positions in the goaf to collect gases at different positions in the goaf, which is convenient for later analysis of the differences between their components.

[0025] The air outlet of the air extraction pipeline is successively connected to a stainless steel vacuum joint 5, a vacuum valve, a pneumatic pressure hose, an air extraction pump, and a rubber bladder. In this embodiment, the pneumatic pressure hose used is a PU tube.

[0026] The air extraction pipeline 1 includes an inner layer 1-1, a middle layer 1-2, and an outer layer 1-3. The inner layer 1-1 is a rubber hose, the middle layer 1-2 is a steel wire mesh tube, and the outer layer 1-3 is a flame-retardant and corrosion-resistant hose, which can avoid the phenomena of fracture, combustion, and corrosion of the air extraction pipeline under the influence of mine pressure and other factors during gas collection.

[0027] Embodiment 2

[0028] A flexible flame-retardant, pressure-resistant, and corrosion-resistant pipeline for extracting gas from the goaf includes three-section air extraction pipelines 1 and a protection box 3. The air outlets of the three-section air extraction pipelines 1 are all arranged inside the protection box 3. The length of the first-section air extraction pipeline is 150 m, the length of the second-section air extraction pipeline is 100 m, and the length of the third-section air extraction pipeline is 50 m, which is used to collect gases from the goaf at different depths. Filters 2 are respectively installed at the intake ports of each section of the air extraction pipeline 1. The filter 2 is composed of a mesh cover 2-1 and a mounting seat 2-2. The mounting seat 2-2 is a hollow cylinder, one end is fixedly connected to the mesh cover 2-1, and the other end is connected to the intake port of the air extraction pipeline 1. The filter 2 and the intake port of the air extraction pipeline 1 are connected through an internal thread joint 6.

[0029] The air outlet of the air extraction pipeline is successively connected to a stainless steel vacuum joint 5, a vacuum valve, a pneumatic pressure hose, an air extraction pump, and a rubber bladder, which is used to pump the gas in the goaf into the rubber bladder, facilitating later analysis of its component composition.

[0030] The air extraction pipeline 1 includes an inner layer 1-1, a middle layer 1-2, and an outer layer 1-3. The inner layer 1-1 is a rubber hose, the middle layer 1-2 is a steel wire mesh tube, and the outer layer 1-3 is a flame-retardant silica gel tube. In this embodiment, the flame-retardant silica gel tube produced by Xiamen Hansheng Rubber and Plastic Products Co., Ltd. is selected, which has impact and tear resistance, acid and alkali resistance, flame retardancy, corona resistance, high voltage resistance, and aging resistance.

[0031] Embodiment 3

[0032] A flexible flame-retardant, pressure-resistant and corrosion-resistant pipeline for gas extraction from gob areas, comprising three sections of air extraction pipelines 1 and a protection box 3. The air outlets of the three sections of air extraction pipelines 1 are all arranged inside the protection box 3. The length of the first section of air extraction pipeline is 150 m, the length of the second section of air extraction pipeline is 100 m, and the length of the third section of air extraction pipeline is 50 m. Filters 2 are respectively installed at the air inlets of each section of air extraction pipeline 1, and the filters 2 are connected to the air inlets of the air extraction pipelines 1 through internal thread joints 6. The filter 2 is composed of a mesh cover 2-1 and a mounting seat 2-2. The mounting seat 2-2 is a hollow cylinder, fixed to the mesh cover 2-1 at one end and connected to the air inlet of the air extraction pipeline 1 at the other end. A bladder is separately connected to the air outlet of each air extraction pipeline 1. A stainless steel vacuum joint 5, a vacuum valve, a pneumatic pressure hose and an air extraction pump are successively connected between the air outlet of the air extraction pipeline 1 and the bladder, for collecting the gases transmitted by different air extraction pipelines 1. Finally, the bladder is sent to the ground chromatographic room to analyze the gas components and contents. The stainless steel vacuum joint ensures the sealing performance during air extraction and guarantees the accuracy of air extraction detection.

[0033] The air extraction pipeline 1 includes an inner layer 1-1, a middle layer 1-2 and an outer layer 1-3. The inner layer 1-1 is a rubber hose, the middle layer 1-2 is a steel wire mesh pipe made of four layers of mutually wound steel wire meshes, and the outer layer 1-3 is a flame-retardant silica gel pipe.

[0034] The protection box 3 includes a rectangular shell 3-1 with an open top and a box cover. The rectangular shell 3-1 and the box cover are connected and fixed by hinges, which is convenient for checking the sealing state at the air outlet of the air extraction pipeline. A partition 3-2 is arranged inside the rectangular shell 3-1, and the partition 3-2 is located between the air inlets of adjacent air extraction pipelines 1, avoiding the phenomenon of entanglement between multiple inspection air extraction pipelines.

[0035] A rubber gasket 4 is arranged at the junction of the air extraction pipeline 1 and the protection box 3, avoiding the air extraction pipeline being cut by the protection box interface and reducing the wear degree of the air extraction pipeline.

Claims

1. Flexible flame-retardant, pressure-resistant and corrosion-resistant pipeline for gas extraction in goaf, characterized in that: The invention comprises a plurality of sections of air extraction pipelines (1) and a protection box (3), wherein the air inlet of each section of the air extraction pipeline (1) is respectively provided with a filter (2), and the air outlet of each section of the air extraction pipeline (1) is arranged in the protection box (3); the air extraction pipeline (1) comprises an inner layer (1-1), a middle layer (1-2) and an outer layer (1-3), wherein the inner layer (1-1) is a rubber hose, the middle layer (1-2) is a steel wire mesh tube, and the outer layer (1-3) is a flame retardant and corrosion resistant hose.

2. The flexible flame-retardant, pressure-resistant and corrosion-resistant pipeline for extracting gas from goaf according to claim 1 is characterized in that: The filter (2) is composed of a mesh cover (2-1) and a mounting seat (2-2); the mounting seat (2-2) is a hollow cylinder, one end of which is fixedly connected to the mesh cover (2-1) and the other end of which is connected to the air inlet of the exhaust pipe (1).

3. The flexible flame-retardant, pressure-resistant and corrosion-resistant pipeline for extracting gas from goaf according to claim 2 is characterized in that: The filter (2) is connected to the air inlet of the air extraction pipeline (1) via an internal thread joint (6).

4. The flexible flame-retardant, pressure-resistant and corrosion-resistant pipeline for extracting gas from goaf according to claim 1 is characterized in that: The air outlet of each of the air extraction pipes (1) is individually connected to a ball bladder.

5. The flexible flame-retardant, pressure-resistant and corrosion-resistant pipeline for extracting gas from goaf according to claim 4 is characterized in that: The air outlet of the air extraction pipeline (1) is sequentially connected to a stainless steel vacuum joint (5), a vacuum valve, a pneumatic pressure hose, an air extraction pump and a ball bladder.

6. The flexible flame-retardant, pressure-resistant and corrosion-resistant pipeline for extracting gas from goaf according to claim 1 is characterized in that: The protection box (3) comprises a rectangular shell (3-1) with an opening at the top and a box cover, wherein the rectangular shell (3-1) and the box cover are connected and fixed by hinges, and a partition (3-2) is arranged inside the rectangular shell (3-1), and the partition (3-2) is located between the air inlets of adjacent exhaust pipes (1).

7. The flexible flame-retardant, pressure-resistant and corrosion-resistant pipeline for extracting gas from goaf according to claim 6 is characterized in that: A rubber gasket (4) is provided at the junction of the air extraction pipeline (1) and the protection box (3).

8. The flexible flame-retardant, pressure-resistant and corrosion-resistant pipeline for extracting gas from goaf according to claim 1 is characterized in that: It comprises three sections of air extraction pipelines (1).

9. The flexible flame-retardant, pressure-resistant and corrosion-resistant pipeline for extracting gas from goaf according to claim 1 is characterized in that: The steel wire mesh tube is made of four layers of steel wire meshes which are intertwined.

10. The flexible flame-retardant, pressure-resistant and corrosion-resistant pipeline for extracting gas from goaf according to claim 1, characterized in that: The flame retardant and corrosion resistant hose is a flame retardant silicone hose.

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