一种密封盖结构

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By using the tapered fit between the plug and the pipe fitting body and the rubber sleeve, a double seal is achieved, which solves the problem of oil circuit blockage caused by the O-ring being sucked into the pipe fitting, ensuring the normal operation and safety of the hydraulic system.

CN224515924UActive Publication Date: 2026-07-17NINGBO SHENGDA SUNSHINE AUTOMATION TECH CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: NINGBO SHENGDA SUNSHINE AUTOMATION TECH CO LTD
Filing Date: 2025-06-19
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

In existing technologies, O-rings may be sucked into the pipe joint under negative pressure, causing oil circuit blockage, affecting the normal operation of the hydraulic system, and even causing safety hazards.

Method used

It adopts a tapered fit structure between the plug and the pipe fitting body, combined with a rubber sleeve and threaded connection to achieve double sealing, abandoning the traditional O-ring design.

Benefits of technology

It effectively avoids O-ring blockage, ensures smooth hydraulic system oil circuit, guarantees normal system operation, is simple to operate, and has high promotional value.

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Abstract

本实用新型公开了一种密封盖结构，包括相互螺接的堵盖和管接头体，所述堵盖的上端设有锥形下凹部，所述管接头体的顶部开设有与锥形下凹部相抵配合的锥形孔；所述堵盖的内周壁设置有第一锥形面，所述管接头体的外周壁设置有与第一锥形面相抵配合的第二锥形面。本实用新型设置有双重密封，当堵盖与管接头体旋紧时，所述锥形下凹部与锥形孔抵接配合，实现第一重密封作用；所述第一锥形面与第二锥形面抵接配合，实现第二重密封作用，从而摒弃传统结构中的O型圈，避免O型圈堵塞管接头体情况的发生，保证了液压系统油路畅通，本实用新型结构简单，操作方便，有较好的推广价值。

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Claims

1. A seal cap structure comprising a blind cap (1) and a pipe joint body (2) screwed to each other, characterized in that: The upper end of the plug (1) is provided with a conical recess (11), and the top of the pipe connector body (2) is provided with a conical hole (21) that abuts against the conical recess (11); the inner peripheral wall of the plug (1) is provided with a first conical surface (12), and the outer peripheral wall of the pipe connector body (2) is provided with a second conical surface (22) that abuts against the first conical surface (12).

2. A closure structure according to claim 1, wherein: The outer peripheral wall of the pipe fitting body (2) is fitted with a rubber sleeve (23), and the second conical surface (22) is disposed on the rubber sleeve (23).

3. A closure structure according to claim 2, wherein: The rubber sleeve (23) is fixedly connected to the pipe fitting body (2) by injection molding.

4. The sealing cap structure according to claim 1, characterized in that: The upper end of the inner peripheral wall of the plug (1) is provided with an internal thread section, and the upper end of the outer peripheral wall of the pipe connector body (2) is provided with an external thread section that is screwed into the internal thread section.

5. The closure structure of claim 1 wherein: The tapered recess (11) and the tapered hole (21) have the same taper, and both the tapered recess (11) and the tapered hole (21) have an upper port diameter larger than the lower port diameter.

6. A closure structure according to claim 1, wherein: The outer peripheral wall of the plug (1) is provided with an outwardly extending force-applying part (13).

7. A closure structure according to claim 1, wherein: The outer peripheral wall of the plug (1) is provided with several protruding ribs (14).