DN Note type single hydraulic prop-Product-Wolwa Group Co., Ltd.

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DN Note type single hydraulic prop introduction

DN in type single hydraulic prop is constant resistance type pillars, cooperate with metal articulated roof beam is applicable to coal mine generally supporting mechanized coal mining working face roof, also can be used in the comprehensive mechanized coal mining working face end support or the temporary support.

Within the DN note type single hydraulic prop are suitable for coal mining working face roof support and end roof support, due to its large carrying capacity, the partial load ability, work schedule, using range is wide, so it can be used in thin coal seam, medium thick seam and thick seam working face.

DN Note type single hydraulic prop working scope

1、Coal seam dip Angle, dip Angle of coal seam is less than 20 ° slowly inclined working face, after a certain security measures can be used for Angle of 25 ° to 35 ° of working face.

2、Pillar height: no greater than the maximum height, namely DN18 type pillars supporting height of 1.8 m, biggest support height range is generally 1.3 ~ 1.8 m; DN22 type pillars supporting height of 2.2 m, biggest supporting height range is generally 1.6 ~ 2.2 m, and so on.

3、Pillars in the process of pressure should not be in pillar in the middle of the push sneak jack fulcrum push to slip

4、In guns taken face when using, should take measures to prevent the pillars of live column surface collapse.

DN Note type single hydraulic prop working principle

DN note type single hydraulic prop working fluid inside the hydraulic oil for 5, prop-pulling oil cylinder of hydraulic oil flow back live column inner chamber to form a closed loop; Don't need to pump station and pipeline system, less equipment, low cost; Where there is no power and pumping stations still use, flexible, convenient management and simple; As working fluid is a closed loop, pillar prop-pulling hydraulic oil flow back live column inner chamber, realize the pillar itself closed-circuit circulation, the hydraulic oil hydraulic oil consumption less; Pillar of the hydraulic system for closed system, the hydraulic oil not spillover, polluting the environment, is conducive to environmental protection, and has little influence on the working face production, better to keep the working environment, better working conditions; Pillar of all valve installed in the pillar cavity, the possibility of contamination by the outside world is small, high reliability.