A sealing device for glass fiber reinforced plastic

By using the gear ring and screw in the sealing connection mechanism, the synchronous horizontal movement and uniform preload of the FRP pipe are achieved, which solves the problem of uneven bolt preload in flange connections, improves sealing reliability and service life, and simplifies the installation process.

CN224454010UActive Publication Date: 2026-07-03HARBIN XIANYING FRP SALES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HARBIN XIANYING FRP SALES CO LTD
Filing Date
2025-06-26
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing FRP sealing devices are connected by flange bolts, which makes it difficult to ensure that the preload of all bolts is completely uniform. This results in uneven pressure on the flange surface, and the gasket may be under-compressed or over-compressed in some areas, which can easily lead to leakage.

Method used

A sealing connection mechanism is adopted, including a drive unit and a driven unit. Through the cooperation of gear ring and lead screw, the left and right sealing steel pipes can move horizontally synchronously. Combined with the design of clamp and rubber gasket, the sealing pre-tightening force is ensured to be uniform and the clamping friction is enhanced. A sealing sleeve is used to achieve bidirectional sealing.

Benefits of technology

It achieves uniformity of sealing preload, improves sealing reliability and service life, simplifies installation steps, increases clamping efficiency, and avoids leakage problems caused by uneven bolt preload in traditional flange connections.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a sealing device for fiberglass reinforced plastics (FRP), relating to the technical field of sealing devices. It includes a left sealing steel pipe and a right sealing steel pipe, with a sealing connection mechanism between them for linear horizontal movement to achieve uniform sealing preload. The sealing connection mechanism includes a connecting drive unit and a driven unit. The connecting drive unit rotates a rotating sleeve, driving a gear ring to rotate. The gear ring drives a lead screw to rotate, which in turn drives a drive lug to move the left frame horizontally, achieving precise linear horizontal movement. This allows the left and right sealing steel pipes to move synchronously and smoothly towards each other. This linear movement method replaces the traditional multi-point tightening of flange bolts, ensuring that the preload applied to the sealing assembly is uniform and synchronous. It completely solves the problem caused by uneven bolt preload in traditional flange connections, significantly improving sealing reliability and service life.
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