Gate valve with high sealing performance

By eliminating the rigid connection between the valve stem and the drive mechanism, and adopting an internal valve stem and magnetic drive, the external leakage problem of the gate valve under high sealing conditions is solved, achieving a highly reliable sealing effect.

CN224283510UActive Publication Date: 2026-05-26HARBIN HBC VALVE
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Patent Information

Application Number
CN202521002440.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-20
Publication Date
2026-05-26
Estimated Expiration
2035-05-20

AI Technical Summary

Technical Problem

In operating conditions where high media sealing is required, the rigid connection between the valve stem and the transmission mechanism of existing gate valves leads to a high risk of external leakage. In particular, there is a risk of the valve stem flying out of the valve if it breaks, and traditional seals are prone to leakage.

Method used

The rigid connection between the valve stem and the drive mechanism is eliminated. An internal valve stem design is adopted, and a strong magnet is used to drive the valve stem nut to rotate through magnetic force to realize the opening and closing of the valve. The sealing structure is only retained at the valve cover and valve body positions.

Benefits of technology

It effectively reduces the risk of valve leakage, improves sealing performance, avoids external leakage points on the valve stem, and enhances safety.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The utility model relates to a gate valve with high sealing performance, which is mainly applied to working conditions with extremely high medium sealing performance and belongs to the field of chemical engineering and nuclear power equipment. A traditional rigid connecting structure of the valve rod and the driving mechanism is omitted, so that an outer leakage point of the valve rod extending out of the valve cover is omitted, and the leakage risk of the valve is reduced from the source of structural design. A valve rod of the valve is arranged in the valve body, and a valve rod nut is connected with the top end of the valve rod through trapezoidal threads. Strong magnets are designed inside and outside, the hand wheel drives the valve rod nut to rotate across the air through magnetic force of the magnets, and finally opening and closing of the valve are achieved. Compared with a traditional structure, only one sealing structure is arranged at the position of the valve cover and the valve body, and the sealing reliability is greatly improved.
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