Support and drainage integrated gas drainage device on top of W-shaped ventilation support

Abstract

The utility model discloses a W-shaped ventilation support top branch and extraction integrated gas drainage device which comprises drainage pipes, one end of each drainage pipe is communicated with a gas extraction hole, the other end of each drainage pipe is provided with a gas extraction opening, the drainage pipes are arranged in multiple rows and fixed together in parallel, one end of each drainage pipe is communicated with a gas extraction pipe, one end of each gas extraction pipe is provided with a gas extraction hole, and the other end of each drainage pipe is provided with a gas extraction opening. The gas extraction pipe is provided with a plurality of communicating holes corresponding to the drainage pipes, the drainage pipes at the top and the bottom are provided with support buckles, the other ends of the drainage pipes are connected with a gas gathering and extraction cover, and the gas gathering and extraction cover is provided with a gas extraction port. The device has the advantages of simple structure, convenience in management, no need of frequent maintenance, no need of operation by a specially-assigned person and the like, the roadway tunneling and maintenance cost of the ventilation system is greatly reduced, the device is mounted once and permanently used, the brought economic benefit is considerable, a new way is opened up for gas accumulation treatment of the W ventilation system of the fully mechanized caving face, and the device has a wide application prospect. The popularization and application in the national coal industry are easy.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the underground gas control technical field of coal mine especially relates to a gas drainage device of support and extraction integrated suitable for W type ventilation support top. BACKGROUND

[0002] The W ventilation mode airflow convergence point of fully mechanized coal mining face, the high gas on the side guard and the rear conveyor, the great safety hazard, restricts the safety production of fully mechanized coal mining face.

[0003] The traditional method is: taking two kinds of working face along the wind system or hanging wind screen in the working face corner.

[0004] The first method is the working face along the wind system method that can effectively solve the problem of working face upper corner gas accumulation, the effect is very good, but the working face along the wind system needs to excavate a large number of roadways, a thousand meters of working face return airway must be excavated, and a few tens of meters or a few hundred meters of roadway along the goaf (along the empty left lane or along the empty sent lane) must be sent. Excavating these roadways will increase the investment of a large amount of funds and increase the mining cost of hundreds of thousands of yuan (even millions of yuan), and even affect the connection of mining and excavation, so most mines do not use the working face along the wind system, only a few large mines use the working face along the wind system or the working face along the new wind system.

[0005] The second method is the gas treatment method of hanging wind screen in the working face corner, which is to tilt and hang wind screen in front of the support on both sides of the return air of the coal mining face, change the direction of a small part of airflow to achieve the purpose of diluting gas. The biggest disadvantage of hanging wind screen in the working face is that the coal mining machine reciprocating coal cutting through the wind barrier causes a certain amount of air leakage, especially when the coal mining machine passes through the return airway, the wind barrier needs to be temporarily removed, and the process gas cannot be controlled, that is, with the advancing speed of the working face, the wind screen cannot be hung, and the wind screen is seriously damaged. The method of hanging wind screen in the working face can temporarily solve the problem of gas accumulation, but it cannot permanently or completely solve the problem of gas accumulation, and it does not fundamentally solve the problem of gas accumulation in the coal mining face, and the coal mining face still exists the hidden danger of gas explosion accident.

[0006] The third method is to use a "2-in-1-back W type" ventilation mode in a fully mechanized coal mining face, the track crossheading and the belt crossheading are air inlets, and the air return crossheading is an air outlet, which is a W type ventilation mode for the coal mining face in a coal mine. In actual production, the gas concentration in the mixing area of the air return crossheading and the branch triangle of the coal mining face is relatively high, which restricts the safety production, and the main reason is that the air flows carrying the gas on both sides of the coal mining face converge in the air return crossheading area to form a vortex and an air flow blind area, which cannot be carried away by the main air flow in time, resulting in gas accumulation and over limit. Moreover, the W type ventilation mode for the coal mining face in the coal mine has technical difficulties of gas accumulation and over limit, which easily causes gas explosion and expensive treatment cost. A simple and effective method is to extract the accumulated gas in time, and due to the safety hidden danger of gas explosion and the special requirements of gas extraction at the top of the support, the safety requirements of the equipment used for extraction are very high. SUMMARY

[0007] In order to solve the above technical problems, the utility model provides a W type ventilation support top support and extraction integrated gas extraction device, which has the advantages of simple structure, convenient management, no frequent maintenance and no need for special operation.

[0008] In order to achieve the above object, the utility model adopts the following technical scheme:

[0009] A W type ventilation support top support and extraction integrated gas extraction device, comprising an extraction pipe, one end of the extraction pipe being communicated with a gas extraction hole, the other end of the extraction pipe being provided with a gas extraction outlet, the extraction pipe being fixed together in multiple rows and parallel, one end of the extraction pipe being communicated with a gas extraction pipe, one end of the gas extraction pipe being provided with a gas extraction hole, a plurality of communication holes corresponding to the extraction pipe being arranged on the gas extraction pipe, support buckles being arranged on the extraction pipes at the top and the bottom, a gas collection extraction cover being connected to the other end of the extraction pipe, and the gas collection extraction cover being provided with a gas extraction outlet.

[0010] The W type ventilation support top support and extraction integrated gas extraction device, at least two reinforcing ribs are arranged on the extraction pipe, the reinforcing ribs are arranged on the front side or the rear side of the multiple rows of extraction pipes or are staggered on the front side and the rear side, or reinforcing ribs are arranged on the front side of the multiple rows of extraction pipes.

[0011] The W type ventilation support top support and extraction integrated gas extraction device, a support front end beam top plate is arranged on one side of the extraction pipe corresponding to the gas extraction outlet.

[0012] The W type ventilation support top support and extraction integrated gas extraction device, a flushing device internal reserved hole is arranged at one end of the extraction pipe corresponding to the gas extraction outlet, and a sealing plug is mounted on the flushing device internal reserved hole.

[0013] The W type ventilation support top support and extraction integrated gas extraction device, the extraction pipe is composed of a plurality of parallel welded I-beams.

[0014] The W-type ventilation support top and gas extraction integrated device, the gas collection extraction cover is formed by welding two conical plates and two rectangular plates in sequence, and the gas collection extraction cover is welded at one end of the multiple rows of extraction pipes.

[0015] Compared with the prior art, the present application has the following technical effects:

[0016] The present application has the advantages of simple structure, convenient management, no need for frequent maintenance and no need for special operation, and can greatly reduce the roadway excavation and maintenance cost of the ventilation system compared with the traditional gas control technology, the device is installed once and used permanently, and the economic benefits are considerable, and a new way is opened up for the W-ventilation system gas accumulation control of the fully-mechanized top coal caving mining face, and is easy to be popularized and applied in the national coal industry. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application.

[0019] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0020] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0021] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, or detachable connection, or integrated; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled persons in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0022] The application will be described in detail below with reference to the accompanying drawings. Figure 1 The structure and working process of the utility model are described in detail.

[0023] A W-type ventilation support top support and extraction integrated gas extraction device, comprising an extraction pipe, one end of the extraction pipe being communicated with a gas extraction hole, and the other end being provided with a gas extraction outlet, the extraction pipe being fixed together in multiple rows and in parallel, one end of the extraction pipe being communicated with a gas extraction pipe, the gas extraction pipe being provided with a gas extraction hole 6 at one end, a plurality of communication holes corresponding to the extraction pipe being provided on the gas extraction pipe, the extraction pipe at the top and the bottom being provided with a support buckle 4, and a gas collection extraction cover being connected to the other end of the extraction pipe, the gas collection extraction cover being provided with a gas extraction outlet 1.

[0024] The W-type ventilation support top support and extraction integrated gas extraction device, at least two reinforcing ribs 3 being provided on the extraction pipe, the reinforcing ribs being provided on the front side or the rear side of the multiple rows of extraction pipes or being staggered on the front side and the rear side, or the reinforcing ribs being provided on the front side of the multiple rows of extraction pipes.

[0025] The W-type ventilation support top support and extraction integrated gas extraction device, one side of the extraction pipe corresponding to the gas extraction outlet being provided with a support front end beam top plate 2.

[0026] The W-type ventilation support top support and extraction integrated gas extraction device, one end of the extraction pipe corresponding to the gas extraction outlet being provided with a flushing device internal reserved hole 7, and a sealing plug being installed on the flushing device internal reserved hole.

[0027] The W-type ventilation support top support and extraction integrated gas extraction device, the extraction pipe being composed of a plurality of I-shaped steel bars welded in parallel.

[0028] The W-type ventilation support top support and extraction integrated gas extraction device, the gas collection extraction cover being composed of two conical plates and two rectangular plates welded in sequence, and the gas collection extraction cover being welded to one end of the multiple rows of extraction pipes.

[0029] The following is an experimental example of the utility model:

[0030] The device uses 14 12# I-beam notched parallel welding, uses the channel left between the I-beams as a drainage pipe, and leaves multiple hole positions at the tail end of the device for low negative pressure gas extraction, and welds a bracket buckle at both ends of the device for fixation to prevent the device from slipping. In order to enhance the compression resistance of the device, six steel plates are welded at one end of the I-beam as the front beam top plate, and at least two reinforcing ribs are welded on the I-beam to enhance the strength of the device and prevent the top plate from being damaged due to large pressure and deformation. The device has the advantages of large gas extraction area, wide coverage, convenient extraction, easy operation, simple management, and the main function is to form a strong foehn effect. According to the required direction, the gas extraction pipe is connected to the gas extraction outlet to exhaust the gas to the gas extraction system, which helps the fully mechanized coal mining face to realize efficient gas extraction.

[0031] Effects:

[0032] 1. One end of the 3 DN160 low negative pressure extraction pipe is connected to the low negative pressure gas extraction system of the working face, and the other end is connected to the gas extraction hole at one end of the gas extraction pipe of the utility model through a two-way valve and a three-way valve. The concentration is about 1%, and the flow rate is 140-160 m 3 / min.

[0033] After replacement, one end of the 1 DN160 low negative pressure extraction pipe is connected to the low negative pressure gas extraction system of the working face, and the other end is connected to the gas extraction hole at one end of the gas extraction pipe of the utility model through a two-way valve. The concentration is about 2%, and the flow rate is 80-90 m 3 / min.

[0034] After replacement, one end of the 2 DN160 low negative pressure extraction pipe is connected to the low negative pressure gas extraction system of the working face, and the other end is connected to the gas extraction hole at one end of the gas extraction pipe of the utility model through two two-way valves. The concentration is about 2%, and the flow rate is 130-140 m 3 / min.

[0035] The flow rate is reduced due to the influence of the pipe diameter, but the extraction concentration is improved.

[0036] The gas extraction device has the following characteristics:

[0037] The technology of the coal mine underground coal mining face W ventilation system branch extraction integrated gas extraction device is domestically created and world advanced, and fills the gap of gas control of the coal mine underground coal mining face W ventilation system.

[0038] 2. The use of the coal mine underground coal mining face W ventilation system branch extraction integrated gas extraction device will effectively control the gas accumulation problem in the upper corner of the coal mine underground coal mining face. The successful development of the device will open up a new way for gas control in the upper corner of all coal mine underground coal mining faces.

[0039] 3. The gas drainage device with integrated ventilation and drainage functions for the coal mining face W in the underground coal mine is safe, economical, practical and economic, and can bring considerable economic benefits.

[0040] 4. The gas drainage device with integrated ventilation and drainage functions for the coal mining face W in the underground coal mine has simple structure, convenient management, no need for frequent maintenance, easy operation and easy popularization and use.

[0041] 5. It is particularly pointed out that the gas drainage device with integrated ventilation and drainage functions for the coal mining face W in the underground coal mine is a noiseless, power-free and pollution-free ventilation structure, and is a pure environmental protection and energy saving product.

[0042] In the installation and use example of the device, the device is installed on the top plate of the 720 support, the support buckle 4 is clamped at the two ends of the support to prevent the device from moving left and right, the top plate 2 of the front end beam of the support is clamped at the front guard plate of the support, the bottom surface reinforcing rib 3 of the device is used to strengthen the strength of the bottom surface of the device and prevent extrusion deformation, the gas extraction hole 6 is reserved to allow gas to enter and pass through the gas direction 5, gather in the gas collection cover, and be discharged through the gas extraction outlet 1 to complete the gas drainage work. The internal flushing device is provided with the reserved hole 7 to prevent the internal drainage device from falling into coal dregs and other objects and causing blockage, and the reserved hole is used to flush the internal drainage device with water flow at regular intervals.

[0043] The above is only the preferred embodiment of the present application, and it should be pointed out that, for those skilled in the art, without departing from the overall concept of the present application, some changes and improvements can be made, which should also be considered as the protection range of the present application.

Claims

1. A W-type ventilation bracket top-support integrated gas extraction and discharge device, comprising an extraction pipe, one end of which is connected to a gas extraction hole, and the other end of which is provided with a gas extraction outlet, characterized in that: The gas extraction pipe is fixed in multiple rows and parallel to each other, one end of the gas extraction pipe is communicated with a gas extraction pipe, a gas extraction hole (6) is arranged at one end of the gas extraction pipe, multiple communication holes corresponding to the gas extraction pipe are arranged on the gas extraction pipe, a support buckle (4) is arranged on the top and bottom gas extraction pipes, a gas collection extraction cover is connected to the other end of the gas extraction pipe, and a gas extraction port (1) is arranged on the gas collection extraction cover.

2. The W-type ventilation support top support and gas extraction integrated device according to claim 1, characterized in that: At least two reinforcing ribs (3) are arranged on the gas extraction pipe, and the reinforcing ribs are arranged on the front side or the rear side of the multiple rows of gas extraction pipes or are staggered on the front side and the rear side of the multiple rows of gas extraction pipes, or reinforcing ribs are arranged on the front side and the rear side of the multiple rows of gas extraction pipes.

3. The W-type ventilation support top support and gas extraction integrated device according to claim 2, characterized in that: The gas extraction pipe is composed of a plurality of I-shaped steel bars welded in parallel.

4. The W-type ventilation support top support and gas extraction integrated device according to claim 3, characterized in that: The gas collection extraction cover is composed of two conical plates and two rectangular plates welded in sequence, and the gas collection extraction cover is welded to one end of the multiple rows of gas extraction pipes.

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