CN102168534A

CN102168534A - Special mining suction drill for coal mine

Info

Publication number: CN102168534A
Application number: CN2011100750771A
Authority: CN
Inventors: 李辉
Original assignee: Henan University of Technology
Current assignee: Henan University of Technology
Priority date: 2011-03-28
Filing date: 2011-03-28
Publication date: 2011-08-31
Anticipated expiration: 2031-03-28
Also published as: CN102168534B

Abstract

The invention relates to a special suction drill for coal mines, comprising a drill rod, a drill bit, an electric motor and a fixing bracket, wherein the drill rod is tubular; one end of the drill rod is provided an opening at the inner side of the drill bit, and an opening at the other end of the drill rod is communicated with an exhaust chamber; and an exhaust motor and an air outlet are arranged on the exhaust chamber. The suction drill related by the invention sucks air through a hole in the middle of the drill bit, so that the slag at the inner wall of a drilled hole can be effectively sucked from the hole in the middle of the drill bit and then discharged by the drill rod; the inner hole of the drill rod is smooth, and air suction enables airflow at the outer side of the drill rod to be even, therefore the drilling cannot be stuck and blocked. Multistage filter elements are sleeved in a cavity at the drill bit, so that dust can be sucked out without blocking the drilled hole; simultaneously, the multistage filter elements in the invention are assembled, disassembled and exchanged very conveniently.

Description

Colliery dedicated suction air drill

Technical field

The present invention relates to the aid that a kind of coal mining is used, particularly relate to a kind of colliery dedicated suction air drill.

Background technology

Because gas threatens the safety of coal mining, the gas that the colliery rises in the wall pump drainage coal seam, Xia Xiang tunnel becomes one preceding important step of coal mining.To some weak seams, can only dry method hole, adopt on the compressed air drifting dust and plant, the coal dust and the compressed air that produce when making boring spray along the gap between drilling rod and the hole wall together.Though the drifting dust gas flow is little big, the energy that compressed air has is big, and the gas shock power of formation is strong, and the band dust quantity is up to 3000mg/m ³, cause the environment of work plane very abominable, the serious threat operating personnel's is healthy, because of colliery poor management and miner follow the line of least resistance, often is not with and wears dust mask, causes serious infringement to the workman is healthy, and therefore a lot of coal miners got pneumoconiosis.Simultaneously, ejection air-flow gas density height runs into the danger that conditions such as high temperature, static, naked light have coal-dust explosion.Because of the height safety in production needs, the dust-removing method of drifting dust technology is forbidden exhaust fan.In order to improve the serious problem of environmental pollution in the dry method boring, present way is the aperture dust arrester that the drilling rod sleeve pipe is set in the aperture of dry method boring, small casing gos deep into the coal seam, big sleeve pipe is pressed close to the tunnel wall, compressed-air actuated drifting dust enters big sleeve pipe along the gap ejection between sliding drilling rod and the small casing, and at big sleeve pipe internal spraying depositing dust, efficiency of dust collection is between 50%～60%, though dust-laying effect is obvious, is difficult to reach and makes environmental health standards.At present, the aperture dedusting also has the process equipment of other form, as multi-stage non-powered orifice dust remover (200920032546.X), river, ore deposit wet type tying deduster (200620110816.0), but because equipment volume is big, remove fast, dress and difficult, be difficult to adapt to the frequent demand of changing of bore position.

Summary of the invention

For overcoming the deficiency that prior art exists, the invention provides a kind of colliery dedicated suction air drill.

Technical scheme: a kind of colliery dedicated suction air drill, comprise drilling rod, drill bit, motor and fixed support, drilling rod are tubulose, and the one end opening is in the drill bit inboard, and other end opening is communicated with wind chamber by pipeline, and exhausting motor and air outlet are installed on the wind chamber.

Suction opeing in wind chamber is coated with screen pack, is set with one deck laying dust bag in wind chamber, this laying dust bag edge and wind chamber edge coupling snapping.

Be set with filter core in the cavity near bit location in the drilling rod.

This filter core comprises at least three layers of stay pipe, is provided with the step surface that can fasten mutually between adjacent two stay pipes, is lined with one deck screen pack between the adjacent two layers stay pipe, and the mesh of the screen pack outside being positioned at is greater than inboard screen pack mesh.

Described step surface is serrated face or lattice plane.

Beneficial effect of the present invention:

Air draught of the present invention is bored, and by the hole air draught in the middle of the drill bit, can suck the disintegrating slag of boring inwall from the hole in the middle of the drill bit effectively, get rid of by drilling rod then, because drill pipe bore is smooth, exhausting makes the outer sidewind of drilling rod even, so just can bit freezing and stifled not boring.

By suit multi-stage filter core in the cavity at drill bit position, can keep dust to be sucked out well and be unlikely to stop up boring, the disassembling, assembling and replacing of multi-stage filter core of the present invention is all very convenient simultaneously.

Description of drawings

Fig. 1 is a colliery of the present invention dedicated suction air drill cross-sectional view;

Fig. 2 is the side structure schematic diagram of Fig. 1;

Fig. 3 is filter core and drill bit installment state schematic diagram;

Fig. 4 is the filter cartridge construction schematic diagram.

Number in the figure 1 is a shell, and 2 is drilling rod, and 21 is step-like retaining edge, and 3 is drill bit, 4 is motor, and 5 is wind chamber, and 6 is the exhausting motor, and 7 is filter core, 8 is hollow rotating shaft, and 9 is gear, and 10 is anchor clamps, and 11 is bearing, 12 is support, and 13 is air outlet, and 14 is screen pack, and 15 is the laying dust bag, 71 is inner layer sleeve, and 72 is inboard screen pack, and 73 is intermediate casing, and 74 is the outer filter net, 75 is outer layer sleeve, and 76 and 77 are respectively step surface, and 78 are the retaining edge.

The specific embodiment

Embodiment one: referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of colliery dedicated suction air drill comprises drilling rod 2, drill bit 3, motor 4 is installed in the housing 1, housing is fixed on the support 12, and motor is by gear drive hollow rotating shaft 8, and this hollow rotating shaft one end is connected with drilling rod by anchor clamps, the other end is communicated with wind chamber 5 by connecting leg, the motor 6 of wind chamber is positioned at upside, and suction opeing is positioned at indoor top, and air outlet 13 is positioned at outdoor.Be set with one deck laying dust bag 14 in the wind chamber, this laying dust bag edge and wind chamber edge coupling snapping are convenient to regular dedusting and are changed, and the suction opeing in wind chamber is coated with screen pack 15, can effectively reduce the pollution to environment.

Be set with filter core 7 in the cavity near bit location in the drilling rod.This filter core comprises three layers of stay pipe, is provided with the step surface that can fasten mutually between adjacent two stay pipes, is lined with one deck screen pack between the adjacent two layers stay pipe, and the mesh of the screen pack outside being positioned at is greater than inboard screen pack mesh.Described step surface is serrated face or lattice plane.

Claims

1. a colliery dedicated suction air drill comprises drilling rod, drill bit, and motor and fixed support is characterized in that: drilling rod is a tubulose, and the one end opening is in the drill bit inboard, and other end opening is communicated with wind chamber by pipeline, and exhausting motor and air outlet are installed on the wind chamber.

2. colliery according to claim 1 dedicated suction air drill, it is characterized in that: the suction opeing in wind chamber is coated with screen pack, is set with one deck laying dust bag in wind chamber, this laying dust bag edge and wind chamber edge coupling snapping.

3. colliery according to claim 1 dedicated suction air drill is characterized in that: be set with filter core in the cavity near bit location in the drilling rod.

4. colliery according to claim 3 dedicated suction air drill, it is characterized in that: this filter core comprises at least three layers of stay pipe, be provided with the step surface that can fasten mutually between adjacent two stay pipes, be lined with one deck screen pack between the adjacent two layers stay pipe, the mesh of the screen pack outside being positioned at is greater than inboard screen pack mesh.

5. colliery according to claim 4 dedicated suction air drill is characterized in that: described step surface is serrated face or lattice plane.