Absorption-induction convectional dust-controlling/removing air/fog curtain device of fully-mechanized working face and method thereof

Patent metadata

Field	Value
Publication number	US-11028693-B2
Application number	US-201916966295-A
Country	US
Kind code	B2
Filing date	Jun 26, 2019
Priority date	Apr 24, 2019
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

An absorption-induction convectional dust-controlling/removing air/fog curtain device of a fully-mechanized working face and a method thereof, wherein the device includes an extraction type dust-purifying blower, a sector deflector, a shearer external spraying device and an inter-hydraulic-support spraying device. The shearer external spraying devices are mounted at both sides of a shearer body close to rocking arms of a shearer and the inter-hydraulic-support spraying devices are mounted at two un-advanced hydraulic supports and two hydraulic supports at a leeward side of a front drum of the shearer respectively. Two extraction type dust-purifying blowers symmetrically mounted at the rocking arm close to the body of the shearer are started simultaneously with their air inlets exactly facing front and rear drums of the shearer respectively, and air outlets connected with the sector deflector. With the device and the method, the working environment is improved and safe production of the coal mine is guaranteed.

First claim

The invention claimed is:

1. An absorption-induction convectional dust-controlling/removing method of a fully-mechanized working face using an absorption-induction convectional dust-controlling/removing air/fog curtain device of a fully-mechanized working face, comprising an extraction type dust-purifying blower, a sector deflector, a shearer external spraying device and an inter-hydraulic-support spraying device, wherein,
there are two extraction type dust-purifying blowers symmetrically disposed at a body of a shearer close to rocking arms respectively; an air inlet and an air outlet are disposed on each of the extraction type dust-purifying blowers, the air inlets both directly face front and rear drums of the shearer, and the air outlets are connected with the sector deflectors;
the shearer external spraying devices are mounted at both sides of the body of the shearer close to the rocking arms and spray onto the front and rear drums at a certain angle to form a fog curtain and thus perform spraying precipitation for part of dusts produced when the front and rear drums of the shearer perform cutting; the inter-hydraulic-support spraying devices are mounted at two un-advanced hydraulic supports and two hydraulic supports at a leeward side of the front drum of the shearer respectively and spray toward a coal wall at a certain angle to form a fog curtain in a machine channel space so as to prevent part of dusts from spreading pollution toward windward and leeward sides;
sequentially comprising the following steps:
at step S1, forming fog curtains at corresponding positions by starting the inter-hydraulic-support spraying device and the shearer external spraying device to wrap a large amount of dusts produced during support advancing and coal cutting, such that part of dusts combine with fog droplets to precipitate; starting the extraction type dust-purifying blowers simultaneously to centrifugally remove part of high-concentration dusts produced by coal cutting of the shearer by sucking the part of high-concentration dusts into the extraction type dust-purifying blowers through a negative pressure generated by rotation of impellers, wherein air has an increased momentum under push of blades and a high-speed air current field is formed at the air outlet; and
at step S2, by the sector deflector, spreading an original columnar air current toward a roof and a floor of a roadway respectively in a vertical space to form an air curtain with a sector area gradually increasing, so as to block dusts that are not captured and precipitated by spraying; and forming a basically-closed full-section dust-purifying air chamber in a working region of a shearer operator to induce a large amount of high-concentration dusts blocked by the air-fog curtain and fog droplets generated by spraying into a goaf through air current, so that the dusts continuously combine with the fog droplets to precipitate during spreading toward the leeward side so as to prevent the dusts in the goaf from returning to the working face along with the air current.

Assignees

• Univ Shandong Science & Tech

Inventors

• Nie Wen
• Xiu Zihao
• Chen Dawei
• Cai Peng
• Peng Huitian
• Yan Jiayi
• Liu Qiang
• Yang Bo
• Du Tao
• Yang Shibo
• Zhang Haihan
• Liu Huajun

Classifications

• E21F5/04 Primary

  Spraying barriers (spray nipples, spraying in general B05B, B05D; picks with arrangements of fluid-spraying nozzles E21C35/187) · CPC title

• E21F5/20 Primary

  Drawing-off or depositing dust ({dust-removing while drilling E21B21/011}; while slitting E21C35/22) · CPC title

• E21C27/02

  solely by slitting (rods, drums, for same E21C25/10; saws, discs, wheels E21C25/18; chains, chain guides, for same E21C25/28) · CPC title

• E21C35/22

  Equipment for preventing the formation of, or for removal of, dust (picks with arrangement of fluid-spraying nozzles E21C35/187; {removing dust while drilling E21B21/011}) · CPC title