A pressurized cylinder for expanding shape

The utility model relates to a pressurized cylinder for expanding shape. It includes cylinder body no. 1 and cylinder body no. 2, a cylinder body draw cylinder body no. 2 be in the same place through bolted connection, the inside cavity no. 1 that is equipped with of cylinder body no. 1, be equipped with the piston in this cavity no. 1, the hinge joint piston rod, two opposite sides of cylinder body are equipped with the water swelling part, the water swelling part includes liquid import, check valve, relief valve, liquid outlet, manometer connector. Utility model's characteristics lie in: the utility model discloses well cavity directly is greater than the diameter of cavity no. 2 always, has improved the pressure in the pressurized cylinder, makes pressure reach 200mp, has promoted work efficiency, the surface contact position is equipped with the sealing washer of being made by elastic material in piston and the cylinder body no. 1, prevent like this that hydraulic oil from leaking cavity no. 1 in, guarant