Check ring for cast iron well lid

By designing a retaining ring for cast iron manhole cover, including an inner ring, a retaining ring and a web plate, and using a semicircular clamp ring and rubber pad to improve the stability and safety of the manhole cover, the problem of deformation and damage caused by spring compression in the prior art is solved.

CN222632333UActive Publication Date: 2025-03-18WUAN YONGTIAN CASTING IND CO LTD
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Patent Information

Application Number
CN202420679210.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-03
Publication Date
2025-03-18
Estimated Expiration
2034-04-03

AI Technical Summary

Technical Problem

The existing cast iron manhole cover retaining ring when the manhole cover is subjected to external force, the spring compression causes the manhole cover to move up and down, which will cause the manhole cover to deform and damage for a long time.

Method used

A retaining ring for cast iron manhole cover is designed, including a retaining ring, an inner ring and a web plate. An anti-fall net and a semicircular clamp are installed in the inner ring. The web plate is welded at the bottom of the retaining ring, and the inner threaded pipe is welded equidistantly on the top of the web plate. The fixing screw is inserted into the wellhead through the internal threaded pipe to reinforce the web plate. The inner ring is welded and fixed in the retaining ring. The manhole cover is covered on the inner ring, the semicircular clamp ring is filled between the inner ring and the manhole cover, and the rubber pad is at the top of the inner ring for impact relief.

Benefits of technology

The semicircular clamping ring between the inner ring and the manhole cover is filled, and the manhole cover is not easy to shake or shake. The rubber pad relieves the impact force. After the retaining ring is installed, the screw reinforces the web plate to avoid displacement of the retaining ring, improves the stability and safety of the manhole cover, and prevents the manhole cover from deforming and damage.

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Abstract

The check ring for the cast iron well lid comprises a check ring body, an inner ring and a center plate, the center plate is welded to the bottom of the check ring body, inner threaded pipes are welded to the top of the center plate at equal intervals, fixing screw rods are arranged in the inner threaded pipes in a penetrating and sleeved mode, the inner ring is welded to the inner side of the check ring body, and an anti-falling net is arranged in the inner ring. Semicircular clamping rings are welded to the inner side, located on the top of the anti-falling net, of the inner ring at equal intervals. The space between the inner ring and the well lid is filled with the semicircular clamping rings, so that the well lid is not prone to shaking and shaking, the impact force generated when the well lid covers the inner ring is relieved through the rubber pad, meanwhile, sealing is conducted between the well lid and the inner ring, and the center plate can be reinforced and not prone to displacement by screwing the fixing screw into a well mouth.
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Citation Information

Patent Citations

  • Check ring for cast iron well lid

    CN210975892U

Cited By

  • Check ring for cast iron well lid

    CN224549202U