一种主变压器低压侧套管结构
By setting an annular groove and a multi-layer sealing structure in the low-voltage side bushing structure of the main transformer, the problem of insufficient sealing performance was solved, and better insulation performance and environmental protection were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUIZHOU BRANCH OF CHINA RESOURCES NEW ENERGY INVESTMENT CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-17
AI Technical Summary
The insufficient sealing at the connection between the low-voltage side bushing and the tank of a traditional main transformer leads to leakage of insulating oil, which affects insulation performance and pollutes the environment.
The system employs an annular groove on the connecting flange and embeds a sealing ring, combined with a transition flange and a sealing layer, to form a multi-layer sealing structure, including a T-shaped sealing ring and a double sealing ring, supplemented by an annular elastic gasket and nitrile rubber to enhance the sealing effect.
It effectively prevents oil leakage, improving the transformer's insulation performance and environmental protection.
Smart Images
Figure CN224519664U_ABST
Abstract
Claims
1. A low-voltage side bushing structure for a main transformer, comprising a housing (1), a low-voltage bushing (2) mounted on the housing (1), and a connecting flange (11) sleeved on the lower porcelain bushing of the low-voltage bushing (2), characterized in that: The connecting flange (11) has an annular groove (12) on the side facing the box (1), and a sealing ring (13) is provided in the groove (12). It also includes a transition flange (3), which is fixed above the connecting flange (11) by bolts and presses the sealing ring (13) to form a sealing interface.
2. A main transformer low voltage side bushing structure as claimed in claim 1, characterized in that: The sealing ring (13) is a T-shaped cross-section sealing ring.
3. A main transformer low voltage side bushing structure as claimed in claim 1, characterized in that: The inner wall of the transition flange (3) and the low-pressure sleeve (2) are filled with a filler layer (14) formed by oil-resistant sealant.
4. A main transformer low voltage side bushing structure as claimed in claim 3, characterized in that: The inner wall of the transition flange (3) is provided with a multi-layer parallel annular groove, and the filling layer (14) is injected into the annular groove.
5. A main transformer low voltage side bushing structure as claimed in claim 1, characterized in that: The sealing ring (13) is a double-seal structure, including an inner sealing ring (132) and an outer sealing ring (131). The inner sealing ring (132) is installed at a lower height than the outer sealing ring (131).
6. A main transformer low voltage side bushing structure as claimed in claim 5, characterized in that: It also includes an annular elastic gasket (133) disposed radially outside the inner sealing ring (132); The space between the elastic gasket (133) and the inner wall of the outer sealing ring (131) is filled with nitrile rubber (134).
7. A main transformer low voltage side bushing structure as claimed in claim 6, characterized in that: The cavity inner ring of the double-sealed structure is provided with a retaining ring (135), which divides the cavity into a first cavity near the outer sealing ring (131) and a second cavity near the inner sealing ring (132). The nitrile rubber (134) is filled into the first cavity.
8. A main transformer low voltage side bushing arrangement according to claim 6 or 7, characterized in that: The elastic ring gasket (133) is made of oil-resistant rubber.