Single hydraulic prop function Single hydraulic prop manufacturer

Description :

　　Single hydraulic support column is a new environmentally friendly supporting equipment, which can be used in conjunction with metal hinged roof beams for supporting the roof of high-end general mining and blasting working faces, as well as supporting the end of comprehensive mining working faces. It can also be used as a separate point column or other temporary support.

　　The single hydraulic prop is applicable to the inclined coal seam mining face with the dip angle of the coal seam less than 25 ° -35 °. The applicable conditions of the roof and floor of the coal seam are: the backwardness of the roof does not affect the recovery of the prop, the floor should not be too soft, and the depth of the prop pressed into the floor does not deteriorate the integrity of the floor, otherwise the base should be enlarged. When used in blasting mining faces with relatively soft coal quality, protective measures should be taken on the surface of the active column coating to prevent collapse. When the pillar is used in conjunction with the wooden top beam or as a point column, the top cover should be replaced with a column cap to avoid damaging the wooden beam.

　　It is compatible with metal hinged roof beams and columns, and can be applied to any coal mining face with a dip angle below 35 °. According to different oil supply methods and working media, pillars are divided into two categories: external oil supply type (referred to as "external injection type") and internal oil supply type (referred to as "internal injection type"); According to the different working strokes of the pillars, they can be divided into single telescopic and double telescopic pillars; According to the different materials used for the pillars, they can be divided into steel pillars and light alloy pillars. Based on actual usage, it can be divided into external injection type single hydraulic support, internal injection type single hydraulic support, and other types of support

　　Classification of individual hydraulic supports

　　Suspended single hydraulic prop

　　Suspension type single hydraulic prop is a type of external injection type single hydraulic prop, but it has a significant advantage over external injection type single hydraulic prop. That is, the DWX type single hydraulic prop adopts the principle of plunger suspension technology, and the suspension force reaches four fifths of the working resistance, while the force on the upright pillar is only one-fifth. The DWX type pillar three-way valve is set on the handle body. When injecting liquid, the three-way valve does not rise with the rise of the active pillar, making it easy to operate, safe and reliable.

　　Double telescopic suspended single hydraulic prop

　　The double telescopic suspended single hydraulic prop is a new generation of single support product for working faces developed by China University of Mining and Technology. It is a supporting equipment for high-end mechanized general mining working faces and also an end support equipment for fully mechanized mining working faces. It is suitable for roof support of coal mining face, end roof support of fully mechanized mining face, and advanced support of roadway excavation. Suspension type single hydraulic prop is a type of external injection type single hydraulic prop, but it has a significant advantage over external injection type single hydraulic prop. That is, the DWX type single hydraulic prop adopts the principle of plunger suspension technology, and the suspension force reaches four fifths of the working resistance, while the force on the upright pillar is only one-fifth. The DWX type pillar three-way valve is set on the handle body. When injecting liquid, the three-way valve does not rise with the rise of the active pillar, making it easy to operate, safe and reliable.

　　Characteristics of Double Telescopic Suspension Monomer Hydraulic Support Products

　　1. It has strong resistance to eccentric load and significant stability. 2. High reliability 3. Light weight 4. Large working stroke 5. High strength 6. Easy to use 7. Low maintenance and repair costs 8. Use neutral water.

　　DN injection type single hydraulic prop

　　Single hydraulic supports are generally divided into external injection single hydraulic supports, internal injection single hydraulic supports, suspended single hydraulic supports, and friction supports. The internal injection type single hydraulic prop is equipped with its own pump and can be quickly raised by shaking with a hand crank during installation. When lowering the prop, the working fluid is not discharged, which can better protect the working environment. It is also convenient to use, flexible to manage, and simple to equip. At present, there are mainly 12 specifications of internal injection type single hydraulic supports with a diameter of 90mm cylinder, ranging from 0.6-3.15m.

　　The general model is DN18-250/80, where D represents a single pillar, N represents an internal injection type, 18 represents a pillar height of 1800mm, 250 represents a pillar working resistance of 250kn, and 80 represents a pillar cylinder diameter of 80mm.

　　Fiberglass single hydraulic support column

　　The fiberglass single hydraulic support column is filled with liquid through a hydraulic station to the three-way valve connected to the single hydraulic support column. The single hydraulic support column starts to rise and reaches the required height. The sealing effect of the sealing ring inside the hydraulic support column is used to complete the support; If it descends, open the unloading valve of the three-way valve, and the hydraulic support column begins to descend, completing the work.

　　Process of using fiberglass hydraulic prop:

　　（1） During the process of lifting and initial support of the fiberglass single hydraulic support column, insert the injection gun in the pipeline system into the oil injection valve body of the three-way valve, hang the locking sleeve, operate the injection gun, and the high-pressure liquid from the pump station opens the spherical one-way valve in the three-way valve through the injection gun, entering the column and forcing the active column to rise.

　　（2） After the installation of the fiberglass hydraulic support column during the load-bearing process, it is in a load-bearing state. With the extension of the support time, the load acting on the support column by the working face top plate increases. When the load borne by the support column exceeds the rated working resistance, the force of the high-pressure liquid in the inner cavity of the support column acting on the safety valve gasket exceeds the predetermined clamping force given to the hexagonal guide sleeve by the safety valve spring. The compression of the safety valve spring causes the safety valve gasket and the hexagonal guide sleeve to move together. The safety valve gasket leaves the valve seat, the safety valve is opened, the liquid in the inner cavity overflows, and the movable column shrinks downward. Rebalance the pressure on the top plate.

　　（3） During the process of recovering the fiberglass single hydraulic support column, insert the unloading handle into the unloading hole of the right valve cylinder of the three-way valve, rotate the unloading handle, force the valve sleeve, connecting screw, oil injection valve body and other components to move axially, compress the unloading valve spring, remove the unloading valve gasket from the sealing surface of the left valve cylinder, open the unloading valve, and spray the working fluid in the inner cavity of the support column into the goaf through the left valve cylinder. The active column will retract under its own weight and the reset spring. Complete pillar recycling.

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