CN209742955U - Remote control upper corner gas extraction system - Google Patents
Remote control upper corner gas extraction system Download PDFInfo
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- CN209742955U CN209742955U CN201920543020.1U CN201920543020U CN209742955U CN 209742955 U CN209742955 U CN 209742955U CN 201920543020 U CN201920543020 U CN 201920543020U CN 209742955 U CN209742955 U CN 209742955U
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Abstract
The utility model discloses a corner gas drainage system in remote control, include low concentration gas drainage pipeline (1) that lays in coal face return air crossheading, every 30~50m sets up a set of gate valve (2) on low concentration gas drainage pipeline (1), and the top of every group gate valve (2) is equipped with a fixed pulley (3), gate valve (2) are including valve body (21), case (22) that can move about from top to bottom are equipped with in valve body (21), case (22) top surface is connected with nylon rope I (4), nylon rope I (4) are worn out valve body (21) and are around on carousel (5) after fixed pulley (3), carousel (5) are apart from gate valve (2) 30~40 m. The utility model relates to a rationally, fine practical application and spreading value have.
Description
Technical Field
The utility model relates to a colliery gas drainage field specifically is a remote control upper corner gas drainage system.
Background
The gas is the first killer for coal mine safety production and is clean energy. The gas extraction is a main means for coal mine gas treatment, and the coal mine gas treatment is realized by adopting various modes of omnibearing three-dimensional extraction, such as extraction of gas at the coal seam, the adjacent coal seam, the fracture zone of the coal face, the upper corner of the coal face and the like, so that the safety production of the coal mine is ensured, and the gas extraction is used as clean energy.
The gas at the upper corner of the coal mining working face is always the key area and the technical difficulty of gas control of the coal mine and is also the high-incidence area of gas accidents. At present, the common ventilation modes of the coal face include a U-shaped mode and a Y-shaped mode. The U-shaped ventilation coal face is more common, but for a high-gas face, although gas extraction modes such as the coal seam, the adjacent coal seam, a coal face fracture zone and the like are adopted, the problem of gas extraction at the upper corner is still difficult to solve, and gas extraction needs to be carried out on a goaf by pipe burying or pipe inserting. The common practice is: laying a low-concentration gas extraction pipeline in a return air gateway of a coal face, extending the extraction pipeline to an upper corner goaf, extracting gas, and disconnecting the extraction pipeline at an upper corner at certain intervals (15-20 m) along with the advance of the face to ensure the extraction of the upper corner range; or a tee joint is arranged on the low-concentration gas extraction pipeline, a pipeline with a certain length is arranged, and when the working face is pushed to enter the upper corner range, the valve is opened for extraction, so that the purpose of gas treatment is achieved. According to the method, the pipe orifice of the extraction pipe is extracted inwards, so that the effect direction of the generated extraction negative pressure is a goaf, the effect on the pipe orifice outwards is small, the gas extraction effect in the upper corner range cannot meet the requirement, on the contrary, the high-concentration gas in the deep part is extracted, the gas in the upper corner range is unstable, and the gas is often over-limited. Especially, the first mode adopts a method of manually breaking the pipeline, firstly, the pipeline is manually broken, the pipeline is operated in a gas overrun state, and simultaneously, the pipeline is operated at the edge of a goaf, so that the pipeline is threatened by the collapse of a top plate, and the pipeline is very unsafe. Therefore, in some mines, two or even three extraction pipelines are buried in the upper corner of the coal face, and the upper corner extraction is carried out by alternately breaking the extraction pipelines in steps, so that the effect is not obvious. In order to prevent the gas at the upper corner from exceeding the limit caused by extracting the gas at the deep part of the goaf of the coal face, the air curtain is additionally arranged at the upper corner for guiding air and the gangue slag is manually bagged and stacked for plugging, the effect is not ideal, and the problem cannot be effectively solved.
Disclosure of Invention
The utility model discloses it is difficult to effective management and control and design a novel remote control upper corner gas drainage system to ventilate coal face upper corner gas based on current "U" type.
The utility model discloses an adopt following technical scheme to realize:
A remote control upper corner gas extraction system comprises a low-concentration gas extraction pipeline laid in a return air crossheading of a coal face, wherein a group of gate valves are arranged on the low-concentration gas extraction pipeline every 30-50m, a fixed pulley is arranged above each group of gate valves, each gate valve comprises a valve body, a valve core capable of moving up and down is arranged in each valve body, a nylon rope I is connected to the top surface of each valve core, the nylon rope I penetrates through the valve body and is wound on a rotary table after passing through the fixed pulleys, and the rotary table is 30-40m away from the gate valves; an upper corner gas extraction tee joint is arranged on the low-concentration gas extraction pipeline and located in the front of each group of gate valves, a pipe orifice of each upper corner gas extraction tee joint faces outwards and is covered with a sealing cap, and a nylon rope II with the length of 5-6m is connected to the sealing cap.
Laying a low-concentration gas extraction pipeline in a return air crossheading of a coal face, installing a group of remote control extraction tee joints and gate valves every 30-50m, leading the gate valves to remote control positions of 30-40m by nylon ropes I and fixed pulleys, and leading the extraction tee joints to remote control positions of 5-6m by nylon ropes II, thus forming an upper corner remote control gas extraction system. When the coal mining working face is pushed forward to enable the extraction tee joint in the current group to enter 3-5 m inside the upper corner, the sealing caps on the extraction tee joints in the group are pulled open to perform inverted extraction on the upper corner, and the extraction amount of the extraction tee joint in the previous group is adjusted by remotely controlling the opening and closing degree of the gate valve at the rotary disc of the gate valve in the previous group. And (3) as the coal face continues to advance, when the group of extraction tee joints enter a proper position (generally 8-10 m) to play a role, closing the upper group of gate valves through remote control, completely cutting off gas extraction of the upper group of extraction tee joints, and repeating in such a circulating way.
The utility model has the characteristics of as follows:
1. The extraction tee bend of the low-concentration extraction pipeline system faces outwards reversely and enters the goaf for inverted extraction, so that the upper corner range forms an air inlet state towards the rear part, the disturbance to the deep goaf is reduced, and the gas flow field of the goaf is changed.
2. The extraction tee bend is outwards, and the mouth of pipe utilizes the extraction negative pressure to seal it, draws it through the nylon rope after entering collecting space area, has realized remote operation.
3. remote control gate valve: the pumping quantities of the front and the rear pumping tee joints of the pumping pipeline system are adjusted by remotely controlling the closing degree of the gate valve through the nylon rope and the pulley, and the pumping in the pumping tee joints is cut off after the external pumping tee joints completely enter a preset range and completely play a role, so that the aim of remote control is fulfilled.
The utility model discloses application condition: and the gas emission amount is 5-10 m3/min, or the gas emission amount is still difficult to solve through the coal seam, the adjacent layer and the fissure zone.
Compared with the prior art, the utility model has the advantages of it is following:
1. The gas flow field of the goaf is changed, the upper corner range is in an air inlet state towards the rear part by utilizing the back suction of the extraction tee joint, the disturbance to the gas of the deep goaf is reduced, the upper corner range and the front goaf range are in a lower gas state, the extraction efficiency is high, and the effect is good. Meanwhile, the gas emission in the deep goaf is reduced, so that the gas concentration in the working face airflow is also obviously reduced, and the safety is higher.
2. The remote operation control ensures the personal safety.
3. compared with the step breaking of a plurality of pipelines and the blocking of upper corner bag, the method saves the cost and reduces the labor intensity.
The utility model relates to a rationally, fine practical application and spreading value have.
Drawings
Fig. 1 shows a schematic layout of the system.
Fig. 2 shows a schematic configuration of the present system.
In the figure: 1-low-concentration gas extraction pipeline, 2-gate valve, 21-valve body, 22-valve core, 3-fixed pulley, 4-nylon rope I, 5-rotary table, 6-upper corner gas extraction tee joint, 7-sealing cap and 8-nylon rope II.
Detailed Description
The following describes in detail specific embodiments of the present invention with reference to the accompanying drawings.
A remote control upper corner gas extraction system is shown in figure 1, and each group of extraction comprises a low-concentration extraction pipeline, an extraction tee joint, a sealing cap and a control gate valve. Specifically, the device comprises a low-concentration gas extraction pipeline 1 laid in a return air crossheading of a coal face, wherein a group of gate valves 2 are arranged on the low-concentration gas extraction pipeline 1 at intervals of 30-50m, a fixed pulley 3 is arranged above each group of gate valves 2, each gate valve 2 comprises a valve body 21, and a valve core 22 capable of moving up and down is arranged in each valve body 21; the gate valve 2 can be manufactured by self, a rectangular valve body is manufactured by adopting a metal plate, the valve body is arranged in a preset extraction pipeline, and a wooden rectangular valve core is hoisted at the upper part in the valve body. The top surface of the valve core 22 is connected with a nylon rope I4, the nylon rope I4 penetrates through the valve body 21 and passes through the fixed pulley 3 to be wound on the rotary table 5, and the distance between the rotary table 5 and the gate valve 2 is 30-40m (namely the length of the nylon rope I is 30-40 m); an upper corner gas extraction tee joint 6 is arranged on the low-concentration gas extraction pipeline 1 and positioned in front of each group of gate valves 2, the pipe orifice of each upper corner gas extraction tee joint 6 faces outwards and is covered with a sealing cap 7, and a nylon rope II 8 with the length of 5-6m is connected to the sealing cap 7.
During specific implementation, a low-concentration gas extraction pipeline is laid in a return air crossheading of a coal face, a group of remote control extraction tee joints and gate valves are arranged at intervals of 30-50m, the gate valves are led to remote control positions of 30-40m by nylon ropes I and pulleys, the extraction tee joints are led to remote control positions of 5-6m by nylon ropes II, and therefore the upper corner remote control gas extraction system is formed. By taking fig. 1 and 2 as an example, all gate valves on the low-concentration gas extraction pipeline are in a fully opened state in advance, a sealing cap is mounted on each extraction tee in advance, and the low-concentration gas extraction pipeline is subjected to negative pressure adsorption. When the coal mining working face is pushed forward to enable a current group of extraction tee joints (T2) to enter 3-5 m inside the upper corner, the sealing caps on the extraction tee joints (T2) of the group are pulled to perform inverted extraction on the upper corner, and the extraction amount of the previous group of extraction tee joints is adjusted by remotely controlling the opening and closing degree of the gate valve at the turntables of the previous group of gate valves; and (3) with the continuous forward propulsion of the coal face, when the group of extraction tee joints (T2) enter a proper position (generally 8-10 m), the gas extraction of the last group of extraction tee joints is cut off through a remote control gate valve. When the coal face continues to be pushed forward, when another group of extraction tee joints (T1) enters 3-5 m from the upper corner, the sealing caps on the extraction tee joints (T1) of the group are pulled to perform inverted extraction on the upper corner, the opening and closing degree of the gate valve (F2) is remotely controlled at the turntable of the gate valve (F2), and the extraction amount of the extraction tee joints (T2) of the previous group is adjusted; and (3) as the coal face continues to advance, when the group of extraction tee joints (T1) enter a proper position (generally 8-10 m) to play a role, closing the gate valve (F2) through remote control, completely cutting off gas extraction of the previous group of extraction tee joints (T2), and repeating in a circulating way.
In order to avoid the roof of the goaf from falling off and smashing the pipeline, a wood point column needs to be erected on the pipeline for protection; the low-concentration gas extraction pipeline is preferably made of a mining plastic pipe and a gate valve, the valve core is a thick wood plate, the valve core is pulled by a nylon rope for remote control, and the valve body is made of a metal plate; a filter screen is added at the mouth of the extraction tee joint to prevent the coal gangue blocks from being sucked.
The above specific embodiments are merely illustrative, and the specific details of the embodiment are only for the purpose of illustration, and do not represent the present invention, which solves the basic technical problems or realizes the basic technical effects, and the changes, equivalent replacements or modifications made are all within the protection scope of the present invention.
Claims (2)
1. The utility model provides a remote control upper corner gas drainage system, includes low concentration gas drainage pipeline (1) that lays in coal face return air crossheading, its characterized in that: a group of gate valves (2) are arranged on the low-concentration gas extraction pipeline (1) at intervals of 30-50m, a fixed pulley (3) is arranged above each group of gate valves (2), each gate valve (2) comprises a valve body (21), a valve core (22) capable of moving up and down is arranged in each valve body (21), the top surface of each valve core (22) is connected with a nylon rope I (4), each nylon rope I (4) penetrates through each valve body (21) and is wound on a rotary table (5) after passing through each fixed pulley (3), and the rotary table (5) is 30-40m away from each gate valve (2); an upper corner gas extraction tee joint (6) is arranged on the low-concentration gas extraction pipeline (1) and located in the front of each group of gate valves (2), a pipe orifice of each upper corner gas extraction tee joint (6) faces outwards and is covered with a sealing cap (7), and a nylon rope II (8) with the length of 5-6m is connected to the sealing cap (7).
2. the remote control upper corner gas extraction system according to claim 1, wherein: and a filter screen is arranged at the pipe orifice of the upper corner gas extraction tee joint (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920543020.1U CN209742955U (en) | 2019-04-22 | 2019-04-22 | Remote control upper corner gas extraction system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920543020.1U CN209742955U (en) | 2019-04-22 | 2019-04-22 | Remote control upper corner gas extraction system |
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| CN209742955U true CN209742955U (en) | 2019-12-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911220A (en) * | 2020-08-14 | 2020-11-10 | 辽宁工程技术大学 | Method for automatically monitoring and removing carbon monoxide at corner on working face |
| CN112302706A (en) * | 2020-11-27 | 2021-02-02 | 陕西旬邑青岗坪矿业有限公司 | Method for freely regulating and controlling depth of upper corner buried pipe to extract gas in goaf |
-
2019
- 2019-04-22 CN CN201920543020.1U patent/CN209742955U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911220A (en) * | 2020-08-14 | 2020-11-10 | 辽宁工程技术大学 | Method for automatically monitoring and removing carbon monoxide at corner on working face |
| CN112302706A (en) * | 2020-11-27 | 2021-02-02 | 陕西旬邑青岗坪矿业有限公司 | Method for freely regulating and controlling depth of upper corner buried pipe to extract gas in goaf |
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