Gas-hydraulic damping cylinder

Abstract

The invention discloses a gas-liquid damping cylinder. The gas-liquid damping cylinder comprises a cylinder barrel; an upper piston, a separation block and a lower piston are slidingly arranged in the cylinder barrel in sequence for dividing an inner cavity of the cylinder barrel to an upper gas cavity, an upper oil cavity, a lower oil cavity and a lower gas cavity; multiple channels for communicating the upper oil cavity with the lower oil cavity are formed in the separation block; a piston rod with the upper end extending out of the cylinder barrel is arranged in the cylinder barrel; the upper piston and the lower piston fixedly coat the piston rod; the piston rod is slidingly connected with the separation block; a lower gas port for communicating the lower gas cavity with the external is formed in the piston rod; and the external of the piston rod is coated with a gas pipe for communicating the upper gas cavity with the external. The cylinder barrel of the gas-liquid damping cylinder is an integral structure, or is connected only through the separation block, so that the external structure is simple, and the cleaning is easy; and the intake port communicated with the gas pipe of the upper gas cavity and the upper gas port communicated with the gas way of the lower gas cavity are both positioned at the same one end of the gas-liquid damping cylinder, so that the gas-liquid damping cylinder is more convenient to install.

Description

technical field [0001] The invention belongs to the fields of general hydraulic technology and pneumatic technology, and specifically relates to a gas-liquid damping cylinder. Background technique [0002] The GMP workshop of the pharmaceutical factory has high requirements on the cleanliness of the equipment, and the relevant parts of the equipment are required to be hygienic without dead ends and easy to clean. [0003] As for the automatic scraper centrifuge, the scraper device driven by a built-in hydraulic cylinder is currently used, and there are many oil pipes connected to it externally. During use and maintenance, it is impossible to guarantee that the hydraulic oil will not leak, so it is difficult to meet this standard. [0004] If a scraper device driven by a built-in cylinder is used, although it can meet the requirements of cleanliness and easy cleaning, the speed of expansion and contraction of the cylinder piston rod is not easy to control, which may easily ca...

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Problems solved by technology

[0003] For the automatic scraper centrifuge, the scraper device driven by the built-in hydraulic cylinder is currently used, and there are many oil pipes connected to the outside. During the use and maintenance process, it is impossible to guarantee that the hydraulic oil will not leak, so it is difficult to meet this standard.

[0004] If a scraper device driven by a built-in cylinder is used, although it can meet the requirements of cleanliness and easy cleaning, the speed of expansion and contraction of the piston rod of the cylinder is not easy to control, which may easily cause centrifuge failure, and there are also uncertainties in safety

[0005] There is a gas-hydraulic damping cylinder on the market. The telescoping speed of the piston rod of this gas-hydraulic damping cylinder becomes stable under the action of hydraulic damping, making it easy to control. However, the gas-hydraulic damping cylinder currently on the market consists of two series It is composed of cylinders, and the air inlet and air outlet are respectively set at the two ends of the two cylinders that are far away from each other, and the two cylinders are fixed by adding a few tie rods outside. Such a complex external structure makes it difficult to clean , it is difficult to build it inside the scraper box

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