Ablate spherical well cover with multi-layer casting

A multi-layer shell and oblate spherical technology, which is applied in the fields of anti-explosion manhole cover and anti-ballistic, can solve the problem that the manhole cover is not high in anti-explosion load and anti-shock wave strike ability, the manhole cover cannot resist the direct hit of kinetic energy bullets, and the force and stability of the manhole cover In order to improve the anti-explosion shock wave load capacity, save materials and improve the overall rigidity

Inactive Publication Date: 2008-11-05
ENG DESIGN RES INST OF SECOND ARTILLERY PLA
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  • Abstract
  • Description
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Problems solved by technology

[0007] The purpose of the present invention is to propose a new type of multi-layer shell oblate manhole cover, to solve the problem that the existing manhole cover is not high in anti-explosion load and anti-shock wave strike ability; Solve the problem that the existing manhole cover uses too much material, the weight is too large, and the force and stability of the manhole cover are poor

Method used

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  • Ablate spherical well cover with multi-layer casting
  • Ablate spherical well cover with multi-layer casting

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Embodiment Construction

[0020] For an embodiment of the invention see figure 1 , this kind of oblate spherical well cover with multi-layer shell, the well cover 1 is supported on the well frame 3, and the well frame is located on the well shaft 4. There is an elastic buffer pad 2 between the above-mentioned well cover and the well frame. The above-mentioned elastic buffer pad can be a large deformable high-strength rubber pad, the well frame is an assembled hollow cylindrical well frame, the wall thickness of the well frame column gradually decreases from top to bottom, and the shaft is an assembled hollow cylinder with equal wall thickness. The well frame above is a ladle high-strength concrete structure. The assembled steel structure of the well frame 3 and the well shaft 4 is first installed as a whole by welding the connecting plate and bolts, and built in the rock mass with steel bars, and then the well frame and the well shaft assembled steel structure are concreted, and the elastic buffer pad...

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Abstract

The invention relates to a multi-layer spheroid well cover, staying on the well frame which is set on the well casing, comprising cover lay, shell and core. The edge of well cover is flat and centre portion of it is spheroid. The shell, which is high-strength concrete covered by steel, comprises external steel plate, inner steel plate and foxtails connecting external and inner steel plate. High-strength concrete is constructed between inner and external steel plate. The core is built with high-strength foamed aluminium. Low attacking ability for anti-explosion load and anti-impact wave is solved. It can resist directly hitting by kinetic energy bomb.

Description

technical field [0001] The invention relates to a manhole cover, in particular to an anti-ballistic and anti-explosion manhole cover. Background technique [0002] In order to prevent kinetic energy bombs and explosion shock waves from entering the civil air defense underground project, improve the survivability of the underground project, and meet the operation requirements of important equipment in the underground project, it is necessary to install a manhole cover at the mouth of the underground project. [0003] The direct impact ability of the existing manhole cover against blast wave and anti-kinetic energy projectile is low. According to relevant data reports in the 1980s, the manhole covers reinforced in the 1970s in the United States were composed of flat steel ladles and compressible concrete plugs, and the simulated pressure of the static load test was up to 600MPa. But as can be seen from above-mentioned document: existing manhole cover also exists following def...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D29/14E04H9/12
Inventor 顾忠明赵汝斌王发军
Owner ENG DESIGN RES INST OF SECOND ARTILLERY PLA
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