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Manhole cover assembly

A manhole cover and component technology, applied in the field of manhole cover components, can solve problems such as complex safety devices, inconvenient installation, and adverse effects on the normal function of the manhole cover, sealing and closing functions, etc., to achieve safe operation, convenient installation, and good sealing effect of effect

Pending Publication Date: 2019-07-09
BASF POLYURETHANE SPECIALTIES (CHINA) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the safety device of this manhole cover is relatively complicated, requires significant changes to the existing manhole cover structure, is inconvenient to install, and may adversely affect the normal function of the manhole cover, such as the sealing and closing function

Method used

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Examples

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Embodiment Construction

[0021] The manhole cover assembly of the present invention is suitable for large containers, especially various pressure vessels, production kettles, stirring tanks and storage tanks used in industries such as the chemical industry.

[0022] In the present invention, the side of the manhole cover facing the opening of the container and thus facing the inner space of the container is called "inside", and the side opposite thereto is called "outside".

[0023] see Figures 1A-1C , which shows a manhole cover assembly according to a first embodiment of the present invention.

[0024] As is generally known, the manhole cover assembly includes a manhole cover base 11 and a manhole cover 12 . The manhole cover base 11 is fixed or integrally formed on a container to be closed (not shown in the figure) in a form such as a protrusion, and is arranged around the opening of the container. The manhole cover 12 is then pivotably mounted on the manhole cover base 11 , for example via a hin...

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Abstract

The invention relates to a manhole cover assembly. The manhole cover assembly comprises a manhole cover base and a manhole cover, wherein the manhole cover base is fixed to an opening of a container to be closed, and the manhole cover is pivotally mounted on the manhole cover base for covering the opening. The manhole cover assembly further includes a safety device for slowing down the closing movement of the manhole cover, the safety device is directly disposed at a local position of the edge of the manhole cover and is disposed outside the manhole cover. In particular, the safety device is formed by at least one cylinder which connects the manhole cover base and the manhole cover in a hinged mode. The manhole cover assembly realizes good operation safety and greatly reduces human errorsat low cost. The manhole cover assembly is applied to the production of polyurethane composite materials, so that better and stable sealing effects of the manhole cover assembly and reactor are achieved, and the manhole cover assembly has very important effects on the performances such as density, emission, aging resistance, heat preservation, demoulding time of final polyurethane products.

Description

technical field [0001] The invention relates to large vessels such as reactors, production vessels or storage tanks used in the chemical industry. More specifically, the present invention relates to manhole cover assemblies intended to close openings of such large containers, for example for servicing operations (also called "manholes" or "manholes"). Background technique [0002] On the large containers that are usually used in industries such as chemical industry, there are generally openings or manholes for personnel to enter into the container for operations such as maintenance or overhaul, and manhole covers matched with such openings. The manhole cover is typically pivotally mounted on a base protruding around the opening and fixedly arranged on the container body and for sealingly closing the opening. When access to the interior of the container is required, such as servicing, the manhole cover is opened to expose the opening and thereby allow the operator to enter a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D90/10
CPCB65D90/10
Inventor 黄明辉侯丹英林寅高勇邓怡伟
Owner BASF POLYURETHANE SPECIALTIES (CHINA) CO LTD
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