Single hydraulic prop is a kind of new environmental protection support equipment, which can be matched with metal hinged roof beam for supporting roof of general mining and gun working face and supporting end of fully mechanized mining face, and can also be used as point pillar or other temporary support. Its principle is to use liquid pressure to produce working resistance to achieve the lifting and unloading. Its structure is relatively complex, including cylinder block, movable column, valve base, roof and other parts, its core structure has three, namely three valves, limit device and reset spring.
Three with the valve as the name implies, there are three USES of the valve. It is the heart of the external injection monomer hydraulic prop, the prop by its one-way valve to open the column and support, by its unloading valve to complete the recovery of the prop, by its safety valve to protect the prop from damage. External injection stanchons assemble the three valves together for easy replacement and servicing. Limiting device, limiting ring, wire retaining ring and limiting step, etc. The resetting spring is an important part of the single hydraulic prop to make the cylinder retract quickly during the recovery, which can accelerate the fall of the prop. The base with the reset spring stanchion cannot be welded to the cylinder, but must be connected in a flexible way, and the connecting wire is used to connect to the cylinder.
Scope of application of single hydraulic prop
There are many types of single hydraulic prop. According to different oil supply mode and working medium, the prop is divided into internal supply type and external supply type. According to the different working stroke of the pillar, the pillar can be divided into single and double telescopic pillar. Depending on the material used, the columns can be divided into steel and light alloy columns.
Individual hydraulic prop with its mainstay and metal hinge, suitable for coal seam dip Angle is less than 25 degrees - 35 degrees in the mining of deeply inclined coal seam working face, adapt to the conditions of coal seam roof and floor is: roof pillar behind does not affect recycling, shoulds not be too soft, pillar pressure plate depth not deteriorate the integrity of the base plate, otherwise should step up the base. Under normal working environment, it is suitable for support operation when one person works. When used in the soft coal mining face, protective measures should be taken for the coating surface of the movable cylinder to prevent breakage, and attention should be paid to not be used for sticking the pillar. When the pillar and the wooden top beam cooperate or make a point column to use, should change the top to the column cap, lest damage wooden beam of course, when the working face of artificial false top of layer mining or geological structure is more complex to use, should take safety measures.
