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A non-contact drilling dust extraction hood

A non-contact, dust cover technology, which is applied in earthwork drilling, wellbore/well components, construction, etc., can solve the problems affecting the energy efficiency of dust extraction, easy to overflow dust, etc., and achieve gap sealing, reliable performance and simple structure Effect

Active Publication Date: 2020-12-01
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a non-contact drilling dust extraction cover for the problem that dust is easily overflowed from the matching gap between the dust extraction cover of the coal mine drilling machine and the drill pipe and affects the energy efficiency of dust extraction.

Method used

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  • A non-contact drilling dust extraction hood
  • A non-contact drilling dust extraction hood
  • A non-contact drilling dust extraction hood

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0018] Such as figure 2 As shown, a non-contact drilling dust extraction cover includes a cover body 120, and the cover body 120 is provided with an inlet end 121, an outlet end 122 and an air extraction end 123. The inlet end 121 of 120 passes through and passes out from the outlet end 122 of cover body 120 so as to form when working as figure 2 In the state shown, the drill bit at the head of the drill pipe 110 drills into the rock, and the suction end 123 of the cover body 120 draws air to form a negative pressure in the cavity of the cover body 120, so that the dust generated ...

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Abstract

The invention relates to the technical field of sealing structures or coal mine mining tools, and particularly relates to a non-contact type sealing structure and a non-contact type drilling dust suction cover. The non-contact sealing structure comprises a barrel body, a cavity is formed in the side wall of the barrel body, the outer side surface of the side wall of the barrel body is provided with a hole which is in communication with the outside and the cavity, an annular flow channel is arranged in the side wall, the flow channel is in communication with an inner cavity and the cavity of the barrel body, the cross section of the flow channel extends along the circumferential direction of the barrel body to form an annular flow channel, an outlet of the flow channel faces one end of thebarrel body, the flow direction of the fluid flowing from the cavity to the inner cavity through the flow channel when the fluid flows out of the flow channel is towards one end of the barrel body, the non-contact seal can be achieved, the structure is simple, and the performance is reliable.

Description

technical field [0001] The invention relates to the technical field of sealing structures or coal mining tools, in particular to a non-contact drilling dust extraction hood. Background technique [0002] Such as figure 1 As shown, at the beginning of the existing coal mine, a drilling rig 6 is used to drive a drill pipe 5 to drill, and the drill pipe 5 passes through the dust control cover 4 and the pre-buried drainage pipe 3 buried in the rock to contact the rock 1 in order to realize drilling. A lot of dust will be produced during the drilling process, so the dust extraction hood 4 is used to connect the pre-buried discharge pipe 3 to extract the dust produced during the drilling process of the drill pipe 3 . Although the drill pipe passes through the dust extraction hood, it is figure 1 The right end of the dust extraction cover 4 in the drill pipe drilling process or moves relative to the dust extraction cover 4 along the drill pipe axis, and will also rotate relative ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B21/015E21B33/03
CPCE21B21/015E21B33/03
Inventor 龚小兵李德文赵中太鲁轲胥奎李定富梁爱春巫亮刘奎邹常富
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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