Hiromi About a hydraulic expander. How it works: a hydraulic expander is our company's patented product, which is based power stations (electric type power stations and diesel-type power station) generated by high-pressure hydraulic oil as an energy source, delivered to each cylinder tube expander through the tubing, control rod expander driven stretching inside, and clever use of the wedge device principle, the force of up to several hundred tons of split stone or even thousands of tons, and rock and concrete compressive strength although outside great, but its internal Tensile strength is relatively limited, it is because each of these features, so expansion can be easily expanded to open the rock within a few seconds, so hard in the ore is separated from the mountain. II. Preparations steps of: 1. the injection of hydraulic oil. Inject 46 # or 68 # anti-wear hydraulic oil to the oil standard position in the cylinder expander power stations. a. Generally the oil standard position 2/3 standard. b. In the cold winter weather it is best to use 46 # hydraulic oils, in the warmer months, you can use 68 # hydraulic oils. c. Work should be kept neat and clean fuel tank and hydraulic oil, hydraulic oil braced avoid the impurities affect the results of the expander, and even lead to pipeline blockage. d. Hydraulic expander frequent usage, the best months to a year to replace a hydraulic oils. When the expander is not used for a long time, it is best to cylinders in the hydraulic oil poured in storage. 2. Check the power source. Electric type expansion machine must check the power cord and voltage, diesel expander should be checked whether the amount of diesel oil injected into compliance. a. 1.5KW electric motor type generally use 2.5mm? 0? 5 three-phase power line, operating voltage 380V. 4KW motor using 4 mm? 0? 5 power line, operating voltage 380V. b. the amount of diesel oil injection type diesel engine oil level should reach the designated location before the start. 3. Check the tubing connections. Check that all connections are securely connected tubing and straighten the tubing. III. Job process steps of: 1. Set pneumatic drill on the need to rescue a point of rock or concrete expansion and drilling. 2. Turn on the power station, the manual valve power station on the appropriated operating range Ⅰ # bit or Ⅱ # bit, while open to all manual valves on the expander to work gear Ⅰ # bit or Ⅱ # bit to determine expansion direction of the wedge device. 3. Place the expander into the hole of rock or concrete, open the manual valve operating range, began to swell. a. Stand-alone expansion-section up to 1.5 meters or more. b. It is more hard rock, the more vulnerable the tensile expansion, the better. c. eight seconds each time expansion.