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Coal mine underground spiral hydraulic mechanical reaming device

A hydraulic and screw-type technology, applied in safety devices, drilling equipment, mining equipment, etc., can solve the problems of uneven distribution of hydraulic power, poor expansion effect of the knife arm, unreasonable structure of the knife arm, etc. Efficiency and reaming efficiency, improving the effect of gas drainage, and shortening the construction period of reaming

Pending Publication Date: 2020-09-04
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the patent of the invention is to provide a coal mine underground spiral hydraulic machine to solve the problems of unreasonable knife arm structure, poor knife arm deployment effect, poor adaptability of high-pressure water injection mode, and uneven distribution of hydraulic power in the existing technology. Reaming device

Method used

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  • Coal mine underground spiral hydraulic mechanical reaming device
  • Coal mine underground spiral hydraulic mechanical reaming device
  • Coal mine underground spiral hydraulic mechanical reaming device

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Embodiment Construction

[0014] Attached below figure 1 and image 3 The implementation of the patent of the present invention is further analyzed and described:

[0015] A coal mine underground spiral hydraulic mechanical reaming device, comprising three space cavities: a drill bit cavity 2, a knife arm cavity 8 and a water valve cavity 19, a power drive device is built in the knife arm cavity 8, and the water valve cavity 19 has a built-in high and low pressure cooling water switching device and a spiral knife arm device; the center of the drill cavity 2 is provided with a low pressure water pipeline 3, and the low pressure water pipeline 3 runs through to the low pressure water inlet 15 at the end of the device, and the side branch of the water flow 4 Connect the drill bit cavity 2 and the knife arm cavity 8; a pair of spiral knife arms 12 for reaming are installed on the side of the device body, and the root of the spiral knife arm 12 is a knife arm gear body 10 processed with helical teeth; The...

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Abstract

The invention relates to a coal mine underground spiral hydraulic mechanical reaming device. The device comprises a drill bit cavity, a cutter arm cavity and a water valve cavity, wherein a power driving device is arranged in the cutter arm cavity, and a high-low pressure cooling water switching device and a spiral cutter arm device are arranged in the water valve cavity. A pair of spiral cutter arms is arranged on the outer side of the cutter arm cavity, cutter arm gear bodies for machining helical teeth are installed at the roots of the spiral cutter arms, and the cutter arm gear bodies aretightly meshed with piston sliding sleeves with helical teeth machined on the same side faces through the helical teeth; a high-pressure water pipeline provides high-pressure water to push a piston tomove and drive a gear, and the spiral cutter arm can be unfolded under the combined action of helical tooth transmission power and the high-pressure water; and the high-low pressure cooling water switching device can change the water pressure in the device and the opening and closing state of the pipeline. The cutter arm structure is changed into a spiral type from a traditional right-angle type,the power supply mode is improved, the cutting efficiency and the reaming efficiency can be improved in the drilling and reaming project, the reaming construction period is shortened, and the gas extraction effect is improved.

Description

technical field [0001] The patent of the present invention relates to the field of hydraulic mechanical reaming of low-permeability coal seams in coal mines, in particular to a spiral hydraulic mechanical reaming device for underground coal mines. Background technique [0002] Coal has always occupied a dominant position in my country's energy structure. With the gradual depletion of shallow coal seam resources in domestic coal mines, deep coal seam mining has become the main form of coal mine production in the future. Most of the deep coal seams in my country have the characteristics of high in-situ stress, high coal seam gas pressure, low coal seam air permeability, complex coal seam roof pressure, and serious coal and gas outburst disasters, which seriously threaten the safe and efficient production of coal mines. This determines the use of coal seam in this field. Pressure relief and anti-reflection, gas pre-pumping, etc. are the development trend of the main preventive m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/28E21F7/00
CPCE21B7/28E21F7/00
Inventor 徐超孙浩石郭超飞边紫琳曹明月杨港秦亮亮
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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