The pillar adopts new reset technology (patent has been applied for), which not only speeds up the speed of lowering the pillar and removing it, but also solves the problem that the return spring of the pillar is easily damaged and deformed due to the large stroke and large support height.
DWS31.5-180/110/90H and DWS35-180/110/90H struts, the first-stage working cylinder adopts the floating plunger working principle, which reduces the axial force of the middle cylinder , improving the stability and safety of the middle cylinder. The secondary working cylinder still adopts a fixed piston structure, which increases the load-bearing area of ??the secondary cylinder. The mixed use of floating plunger type and fixed piston type (patent has been applied for) can solve the problem of liquid injection height for large, tall and long-stroke pillars even if the bearing capacity is reasonably distributed.
The pillar is filled with liquid on the outer guide sleeve of the first-level working cylinder, and there is no circumferential weld on the movable cylinder that is difficult to guarantee in technology, which avoids the actual sealing performance of the pillar caused by leakage or fracture damage of the weld. accident hazards.
An exhaust device (patent has been applied for) is added to the large and high pillars, which solves the problem of filling the middle or bottom of the large and high pillars with liquid and exhausting the inner cavity of the pillars.