Fast sealing manhole cover

Abstract

The invention relates to a fast sealing manhole cover in the technical field of tank cars. The fast sealing manhole cover comprises a cylindrical base connected to a tank body. A round cover body capable of shielding an opening part of the base is arranged on the edge of the opening part of the base. A sealing pad is correspondingly arranged at the position of a combining face of the cover body and the base, multiple protruding lugs are arranged in the semi-circumference range of the outer edge of the opening part of the base, and tenons capable of being inserted into the protruding lugs are arranged on the cover body in a one-to-one correspondence manner. Multiple protruding blocks are arranged in the other semi-circumference range of the outer edge of the opening part of the base, and clamping connecting parts capable of hooking the protruding blocks are arranged on the cover body in a one-to-one correspondence manner. The cover body and the base are connected through two supportingplates via a pin shaft. The sealing pad is installed in a clamping groove of the cover body and is an inflatable elastic body. After inflation, the sealing pad is budged towards one side of a sealingedge and is pressed on the sealing edge of the opening part of the base. The cover body can be rapidly opened, closed and sealed, high safety is achieved, and the fast sealing manhole cover is suitable for various tank cars loading liquid, powder and particles.

Description

technical field [0001] The invention relates to a maintenance and inspection passage for tank cars, in particular to a manhole device. Background technique [0002] In the Chinese patent database, a quick opening manhole cover is disclosed, its application number: CN201510246468.3, application date: 20150515; publication number: CN104828418A; publication date: 20150812; the device includes a cylindrical The base, the edge of the mouth of the base is hinged with a circular cover that can cover the mouth of the base, the position of the joint surface between the cover and the base is correspondingly provided with a gasket, and a number of claw mechanisms are distributed around the outer edge of the mouth of the base , each claw mechanism includes a connecting ear, a pin shaft one, a threaded sleeve, an adjusting screw, a pin shaft two and a pressing claw, the connecting ear is fixedly connected to the side of the base, the connecting ear is connected to the threaded sleeve thr...

AI Technical Summary

Problems solved by technology

Its shortcoming is that the opening process is complicated and the operation is troublesome by adopting the method of pressing claws to open.

Its shortcoming is: this device also has the defects that the opening process is relatively complicated and the operation is troublesome

[0004] In addition, the manhole cover in the prior art has certain potential safety hazards. Under abnormal conditions with high internal pressure, the cover body is easy to collapse and fly, causing accidents.

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