一种高温工况下高密封蝶阀
By designing the connecting sealing components, the problem of bolt preload reduction caused by thermal expansion in high-temperature butterfly valves is solved, achieving a high sealing effect under high-temperature conditions and ensuring the reliability and sealing performance of butterfly valves in high-temperature environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KAIERTE VALVE
- Filing Date
- 2025-08-13
- Publication Date
- 2026-07-17
AI Technical Summary
Existing high-temperature butterfly valves experience leakage problems due to the decrease in bolt preload caused by pipeline thermal expansion under high-temperature conditions, resulting in the formation of annular pressure-reducing cavities between the flange sealing surfaces.
The system employs a connecting sealing assembly, including a rotating ring, a limiting shell, a beveled ring, and a wedge-shaped sealing ring. Through a compression sealing mechanism, the sealing ring undergoes adaptive deformation, compensating for bolt preload attenuation, eliminating annular pressure-reducing cavities, and enhancing the sealing effect.
It effectively prevents media leakage in high-temperature environments, improves valve reliability and sealing performance, and ensures a long-lasting seal at the connection.
Smart Images
Figure CN224515990U_ABST
Abstract
Claims
1. A high temperature high sealing butterfly valve, comprising a valve body (1) and a connecting sealing assembly (9), characterized in that: A bracket (2) is fixedly connected to the top of the valve body (1), a bevel gear (3) is installed on the top of the bracket (2), a valve stem (4) is fixedly connected to the bottom of the bevel gear (3), the bottom of the valve stem (4) penetrates into the inner cavity of the valve body (1) and is fixedly connected to a gate plate (5), valve seats (6) are installed on both sides of the inner cavity of the valve body (1), a valve cover (7) is installed on the top of the inner cavity of the valve body (1), and a wedge-shaped sealing ring (8) is installed on the top of the surface of the valve cover (7). The connecting sealing assembly (9) includes a connecting pipe (91), and flanges (92) are installed on the opposite side of the connecting pipe (91) and the valve body (1). A sealing shell (93) is installed on the surface of the valve body (1). A slope sealing ring (94) is fixedly connected to the inner wall of the sealing shell (93). A compression sealing mechanism (95) is threadedly connected to the surface of the sealing shell (93).
2. The high sealing butterfly valve under high temperature working condition according to claim 1, characterized in that: The compression sealing mechanism (95) includes a rotating ring (951), the inner wall of which is threadedly connected to the surface of the sealing shell (93), a limiting shell (952) is fixedly connected to the left side of the rotating ring (951), and a beveled ring (953) is provided on the inner wall of the sealing shell (93). The left side of the beveled ring (953) is slidably connected to the inner wall of the limiting shell (952).
3. The high sealing butterfly valve under high temperature working condition according to claim 2, characterized in that: The surface of the rotating ring (951) is fixedly connected with anti-slip ridges, and the surface of the inclined ring (953) is slidably connected to the inner wall of the sealing shell (93).
4. The high sealing butterfly valve under high temperature working condition according to claim 1, characterized in that: The top of the wedge-shaped sealing ring (8) is equipped with four open rings and a pressure ring from top to bottom. A support ring (10) is fixedly connected between the two sides of the inner cavity of the valve body (1). The bottom of the support ring (10) is fixedly connected to the valve cover (7) by bolts.
5. The high sealing butterfly valve under high temperature working condition according to claim 1, characterized in that: The valve cover (7) is provided with a packing gland (11) at the top, and the bottom of the packing gland (11) is connected to the valve cover (7) by a traction frame (12). The inner wall of the valve cover (7) is provided with packing (13).
6. The high sealing butterfly valve under high temperature working condition according to claim 1, characterized in that: Bolt holes are provided on the flange (92) on the opposite side of the connecting pipe (91) and the valve body (1), and the slope sealing ring (94) is made of high temperature resistant rubber ring.
7. The high sealing butterfly valve under high temperature working condition according to claim 5, characterized in that: The bottom of the traction frame (12) is movably connected to the valve cover (7) by a pin, and the top of the traction frame (12) is fixedly connected to the packing gland (11) by bolts.