一种螺纹密封结构

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By incorporating a sliding sealing component and a transmission component into the threaded connection structure, the sealing effect of the sealing ring is improved by utilizing pressure difference and dual elastic elements. This solves the problem of traditional sealing structures being prone to failure under different environments, achieving stable and easy-to-maintain sealing performance.

CN224515921UActive Publication Date: 2026-07-17HAINAN BRANCH OF CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD +1

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: HAINAN BRANCH OF CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD
Filing Date: 2025-07-22
Publication Date: 2026-07-17

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Abstract

本实用新型涉及螺纹连接结构的技术领域，更具体地，涉及一种螺纹密封结构，包括外壳、连接杆和第一密封圈，连接杆螺纹连接与外壳内，第一密封圈设于连接杆和外壳之间，还包括滑动密封组件和传动组件，滑动密封组件密封滑动连接于外壳内，滑动密封组件将外壳内分隔为进液腔和施压腔，施压腔位于进液腔和第一密封圈之间，进液腔设有进液口，传动组件的两端分别与滑动密封组件和第一密封圈连接。本实用新型通过设置滑动密封组件和传动组件，将外壳内部分隔为进液腔和施压腔，当进液腔和施压腔在不同环境下具有压力差时，滑动密封组件通过传动组件将压力差作用在第一密封圈上，提高第一密封圈的密封效果，从而在不同环境下均保持良好密封效果。

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Claims

1. A threaded sealing structure, comprising a housing (100), a connecting rod (200), and a first sealing ring (300), wherein the connecting rod (200) is threadedly connected to the housing (100), and the first sealing ring (300) is disposed between the connecting rod (200) and the housing (100), characterized in that, It also includes a sliding sealing assembly (400) and a transmission assembly (500). The sliding sealing assembly (400) is slidably connected to the housing (100) and divides the housing (100) into a liquid inlet chamber (121) and a pressure chamber (122). The pressure chamber (122) is located between the liquid inlet chamber (121) and the first sealing ring (300). The liquid inlet chamber (121) is provided with a liquid inlet (123). The two ends of the transmission assembly (500) are respectively connected to the sliding sealing assembly (400) and the first sealing ring (300).

2. The threaded seal structure of claim 1, wherein, The transmission assembly (500) includes a first elastic element (510) arranged axially along the first sealing ring (300). The first elastic element (510) is located in the pressure chamber (122). The two ends of the first elastic element (510) abut against the sliding sealing assembly (400) and the first sealing ring (300), respectively.

3. The threaded seal structure of claim 2, wherein, The transmission assembly (500) further includes a transition ring (520), through which the first elastic element (510) abuts against the first sealing ring (300).

4. The threaded seal structure of claim 2, wherein, It also includes a second elastic element (600) arranged axially along the first sealing ring (300), the second elastic element (600) being located in the liquid inlet chamber (121), and the two ends of the second elastic element (600) being connected to the sliding sealing assembly (400) and the outer shell (100) respectively.

5. The threaded seal structure of claim 4, wherein, The outer casing (100) includes a housing (110) and a pressure cap (120). The pressure cap (120) is threadedly connected to the housing (110). The first sealing ring (300) is disposed between the connecting rod (200) and the housing (110). The sliding sealing assembly (400) is slidably connected to the pressure cap (120). The sliding sealing assembly (400) divides the inside of the pressure cap (120) into the liquid inlet chamber (121) and the pressure chamber (122). The two ends of the second elastic member (600) abut against the sliding sealing assembly (400) and the pressure cap (120) respectively.

6. The threaded seal structure of claim 1, wherein, The housing (100) is provided with a conical groove (111), the inner diameter of which gradually decreases from the sliding sealing assembly (400) to the connecting rod (200), and the first sealing ring (300) is located in the conical groove (111).

7. A threaded seal structure according to any one of claims 1 to 6, characterized in that The first sealing ring (300) has an annular groove (310) inside, and a radial spring (320) is provided inside the annular groove (310).

8. A threaded seal structure according to any one of claims 1 to 6, characterized in that The sliding sealing assembly (400) includes a piston (410) and a second sealing ring (420). The piston (410) is slidably connected to the housing (100), and the second sealing ring (420) is sleeved on the outside of the piston (410) and is located between the piston (410) and the housing (100).

9. The threaded sealing structure according to claim 8, characterized in that, The second sealing ring (420) has an anti-slip structure on its inner side, and the anti-slip structure is located between the piston (410) and the second sealing ring (420).

10. The threaded seal structure of claim 9, wherein, The second sealing ring (420) has multiple stepped sealing lips on its outer side along the radial direction, and the sealing lips are located between the second sealing ring (420) and the outer shell (100).