An inner support type sealing device

Abstract

The invention provides a novel inner supporting type sealing device.The novel inner supporting type sealing device comprises a sealing cover, a sealing gasket, an oil injection pipe, a refueling tank opening, a four-bar mechanism and an oblique cone.The four-bar mechanism and the oblique cone are arranged in the refueling tank opening.The four-bar mechanism is hung on the sealing cover through a pin shaft.The four-bar mechanism swings in the radial direction with the pin shaft as the center.The outer diameter portion of the oil injection pipe is sleeved with the oblique cone, and the oblique cone can move up and down along the oil injection pipe.A connecting bar on the lowest portion of the four-bar mechanism is a movable bar, one end of the movable bar is provided with a round wheel, and the other end of the movable bar is provided with a triangular block.The round wheel of the movable bar is tangent to the conical surface of the oblique cone, and the movable bar and the oblique cone are kept perpendicular to each other.The novel inner supporting type sealing device is simple in overall structure, convenient to operate, reliable in sealing, safe, environmentally friendly and suitable for tank openings with different hole diameters.

Description

technical field [0001] The invention relates to a sealing device, in particular to a novel internal support type sealing device. Background technique [0002] In the petrochemical industry, during the loading process of the fluid, most of the fluids are filled in the open mode, that is, the oil filling pipe is directly inserted into the tank mouth of the train or car. The volatilized gas is directly discharged into the atmosphere, which will produce toxic oil gas and harmful gas. In severe cases, it will cause fire and explosion accidents, which will have a great impact on safe production, personal safety and environmental protection. It not only causes environmental pollution, Also caused the waste of filling medium simultaneously. [0003] Chinese invention patent (201410203940.0: a pneumatic locking sealing device) discloses a pneumatic locking sealing device, which is installed on the vertical pipe of the top-mounted crane pipe, and is characterized in that it includes ...

AI Technical Summary

Problems solved by technology

The above invention only realizes the sealing of the tank mouth, but the sealing effect cannot be achieved for tank mouths of different calibers, and the filling medium is often wasted during the process of injecting fluid into the tank mouth

[0006] The above-mentioned second utility model patent is to realize the locking and fixing of the position of the crane tube and the vehicle mouth when loading the vehicle through the lifting rod, the booster wedge, the support rod and the locking block, which can prevent the seal from being unstable; however, the entire truss The sealing device of the crane tube has a complex structure and is inconvenient to operate. After repeated use, the force wedges linked with the struts will become more worn, and the struts will be deformed under high pressure. Long-term use will lead to a decrease in sealing performance.

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