A quick-sealing manhole cover

Abstract

The invention relates to a quick-sealing manhole cover in the technical field of tank trucks, comprising a cylindrical base connected to the tank body, a circular cover that can cover the mouth of the base is provided on the edge of the mouth of the base, the cover The position of the joint surface of the body and the base is correspondingly provided with a sealing gasket, a number of lugs are provided within the semicircle range of the outer edge of the mouth of the base, and tenons that can be inserted into the lugs are provided on the cover one by one; The outer edge of the mouth of the base is provided with a number of protrusions within the scope of the other half circle, and the cover body is provided with clips that can hook the protrusions one by one, and the cover body and the base are connected by two support plates through pin shafts , the gasket is installed in the slot on the cover, the gasket is an inflatable elastic body, after inflation, the gasket bulges toward the side of the sealing edge and is pressed against the sealing edge of the mouth of the base. It can quickly switch and seal the cover, and has high safety. It is suitable for various tank trucks loaded with 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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