The so-called single-acting hydraulic jack and double-acting hydraulic jack are actually distinguished by the reset method. Intuitively, single-acting jacks are equipped with one standard connector, and double-acting hydraulic jacks are equipped with two standard connectors. The single-acting hydraulic jack uses gravity reset, and the double-acting hydraulic jack uses hydraulic reset.
Gravity reset means that after jacking, a continuous load needs to be loaded. Under the tension of the high-strength spring inside the cylinder, the pressure is slowly reduced, and finally the jack is reset. This reset method takes a long time, but due to the internal structure only A high-strength spring is required for traction, and the cost is relatively cheap. The hydraulic reset method uses hydraulic energy to suck the ejected piston rod into the cylinder again. Generally speaking, the pressure required when the cylinder is retracted is half of the pressure when it is lifted. This kind of reset speed is fast, and it is the best choice for projects that require a short time to complete the task. Due to the complex structure, the cost is relatively expensive The double-acting jack is a jack with two functions of tensioning and pressing and anchoring. According to the structure, there are double-acting through-core jacks and cone anchor jacks. When working, the tensioning cylinder is filled with oil and moves backward for tensioning, and then the top pressure cylinder is filled with oil, pushing the piston rod against the wedge-shaped clip or the cone-shaped anchor plug, and anchoring the steel strand or wire bundle. The double-acting jack for sale is a tension jack that has two functions of stretching the steel bar and pressing anchor when the pre-stressed steel bar is tensioned. That is, one function is to clamp the steel bar for tensioning, and the other function is to push the clip into the anchor ring so that the prestressed steel bar is clamped.
The pressure of the liquid in the double-acting jack for sale is the same everywhere. In this way, in a balanced system, the pressure exerted on the smaller piston is lower, and the pressure exerted on the larger piston is also higher, so that the liquid can be kept still. 1. The compact and flat design is used in occasions where other hydraulic cylinders are not suitable;
2. The mounting holes make fixing easy; ·The painted surface makes the corrosion resistance stronger;
3. All models include quick connectors and dust caps;
4. Chrome-plated plunger;
5. No saddle is needed on the surface of the grooved plunger; ·Single-acting, spring retracts;
6. Single-phase action, load retraction;
7. The outer coating of baking paint and the special electroplated piston have stronger corrosion resistance and lower friction during operation;
8. The unique support design can withstand the side load of 10% of the cylinder's carrying capacity without damage to the cylinder;
9. There are standard base mounting holes on each type of cylinder;
10. With detachable hard groove saddle.