CN102168534B

CN102168534B - Special mining suction drill for coal mine

Info

Publication number: CN102168534B
Application number: CN201110075077.1A
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: 2014-01-15
Anticipated expiration: 2031-03-28
Also published as: CN102168534A

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

Special mining suction drill for coal mine

Technical field

The present invention relates to the aid that a kind of coal mining is used, particularly relate to a kind of special mining suction drill for coal mine.

Background technology

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

Summary of the invention

The deficiency existing for overcoming prior art, the invention provides a kind of special mining suction drill for coal mine.

Technical scheme: a kind of special mining suction drill for coal mine, comprise drilling rod, drill bit, motor and fixed support, drilling rod is tubulose, and one end opening is in drill bit inner side, and other end opening is communicated with wind chamber by pipeline, and exhausting motor and air outlet are installed on 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 matching snapping.

In drilling rod, approach in the cavity of bit location and be set with filter core.

This filter core comprises at least three layers of stay pipe, between adjacent two stay pipes, is provided with the step surface that can mutually fasten, and is lined with one deck screen pack between adjacent two layers stay pipe, and the mesh that is positioned at the screen pack in outside is greater than inner side 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 drill bit, can effectively the disintegrating slag of drill hole inner wall be sucked from the hole in the middle of drill bit, then by drilling rod, get rid of, 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 being set with multi-stage filter core in the cavity at drill bit position, can keep well dust to be sucked out 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.

Accompanying drawing explanation

Fig. 1 is special mining suction drill for coal mine cross-sectional view of the present invention;

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 filter cartridge construction schematic diagram.

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

The specific embodiment

Embodiment mono-: referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4,, comprise drilling rod 2, drill bit 3, motor 4 is installed in housing 1, housing is fixed on 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 fixture, 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.In wind chamber, be set with one deck laying dust bag 14, this laying dust bag edge and wind chamber edge matching snapping, be convenient to regular dedusting and change, and the suction opeing in wind chamber is coated with screen pack 15, can effectively reduce the pollution to environment.

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

Claims

1. a special mining suction drill for coal mine, comprises drilling rod, drill bit, and motor and fixed support, drilling rod is tubulose, and one end opening is in drill bit inner side, and other end opening is communicated with wind chamber by pipeline, and exhausting motor and air outlet are installed on wind chamber; It is characterized in that: the suction opeing in wind chamber is coated with screen pack, in wind chamber, be set with one deck laying dust bag, this laying dust bag edge and wind chamber edge matching snapping; In drilling rod, approach in the cavity of bit location and be set with filter core.

2. special mining suction drill for coal mine according to claim 1, it is characterized in that: this filter core comprises at least three layers of stay pipe, between adjacent two stay pipes, be provided with the step surface that can mutually fasten, between adjacent two layers stay pipe, be lined with one deck screen pack, the mesh that is positioned at the screen pack in outside is greater than inner side screen pack mesh.

3. special mining suction drill for coal mine according to claim 2, is characterized in that: described step surface is serrated face or lattice plane.