The development of the hydraulic prop mainly goes through three stages: wood hydraulic prop, metal friction hydraulic prop and single hydraulic prop. Finally, single hydraulic prop dominates. What are the characteristics of the single hydraulic prop?
1. Wooden support:
The wood prop is greatly influenced by the material, and the bearing capacity of each prop is unbalanced. Difficult column return, low efficiency, roof collapse accident, unsafe, but light weight, very strong adaptability.
2. Metal friction support:
The support force generated by friction is light in weight, low in cost and simple in mechanism. However, the initial support force is small and uneven. The support force is greatly affected by temperature and humidity, which is easy to cause uneven sinking and breakage of the roof, thus affecting safety production.
3. Single hydraulic prop:
There are two types of internal and external injection, including loading, lifting, unloading back column three rules.
External injection type prop plunger suspension type and piston type two.
Advantages of floating single hydraulic prop:
(1). Seal compensation and tensioning technology are adopted in each sealing point of the suspended hydraulic prop, so the replacement of seals is very convenient and the installation and disassembly maintenance is simple, only the damaged parts can be replaced.
(2) the living column adopts the unique heat treatment processing technology, which improves the bursting and bending resistance of the product and prevents mechanical damage, reduces the maintenance amount of the prop, and improves the safety performance of the product.
(3) suspension type hydraulic prop adopts phosphorus, nickel, boron electroless plating surface treatment technology, wear resistance, corrosion resistance, can be used in the underground neutral water as the working medium, is environmental protection prop equipment.
