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Single Hydraulic Props Description:
The single hydraulic prop is suitable for the inclined coal seam mining face with the coal seam inclination angle less than 25 degrees - 35 degrees. The condition of the coal seam top and bottom plate is: the roof is not affected by the recovery of the pillar, the bottom plate should not be too soft, and the pillar is not pressed into the bottom plate. Deteriorate the integrity of the base plate, otherwise the base should be enlarged. When used in a soft coal mining face, protective measures should be taken on the surface of the live cylinder to prevent collapse. When the pillar is used with the wooden top beam or used as a point column, the top cover should be replaced with a column cap to avoid damage to the wooden beam.
Main Features
1. The work schedule is large and the cost of safety management is low.
Each specification can replace 2-4 specifications of traditional piston type single props, which reduces the frequency of different types of unit pillars due to the change of working face height and the change of the moving amount of the roadway and the floor. And additional spare quantities for the pillars.
2. High support strength and good safety and stability.
The pillars have no bearing welds, and the pillars adopt the suspension technology principle. The suspension force generated by the high pressure liquid directly acts on the top cover end, reaching four-fifths of the working resistance, and the column is only one-fifth of the force, which greatly improves the pillars. Support stability and eccentricity.
3, the leak is easy to find, safe and reliable.
Due to the structural improvement, the imaginary top and the topping of the pillar caused by the internal leakage are avoided. Once the pillar is leaked, it can be directly inspected by the naked eye at the underground site, and the pillar can be replaced at any time; the principle of sealing compensation and sealing tensioning technology is adopted. The greater the pressure on the top plate, the tighter the sealing surface fits, and the less likely it is to leak.
4, long service life, easy operation and maintenance.
The overall structure is simple, the service life is long; the operation is convenient, the maintenance is easy, and the pillar uplifting and maintenance rate can be greatly reduced.
DW External Injection Type Single Hydraulic Prop
The external injection type single hydraulic prop is a kind of hydraulic support equipment which is commonly used in the underground working face. It can be used for the roof support of the common mechanized coal mining face, and can also be used for the end support of the fully mechanized mining face and the working face. Temporary support for easy landing.
DN Internal Injection Type Hydraulic Prop
The DN internal injection type hydraulic prop is suitable for the roof support and the end roof support of the coal mining face. Due to its large bearing capacity, strong anti-offset capability, large working stroke and wide application range, it can be applied. Thin coal seam, medium thick coal seam and thick coal seam working face.
DW Suspension Single Hydraulic Prop
It overcomes the defects and problems of weld fracture and internal leakage in the (piston) single hydraulic prop used at home and abroad. It is a technical product protected by international inventions, national inventions and utility model patents, and is listed as "Technology by the Ministry of Science and Technology". Fifteenth National Science and Technology Achievements Key Promotion Plan Project.