Composite sealing ring
By using PEEK material and rubber elastic ring design in the ball valve seal ring, the sealing problem of the seal ring under high and low pressure conditions is solved, and a reliable sealing effect is achieved under different working conditions.
Patent Information
- Application Number
- CN202422449166.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-10-11
AI Technical Summary
The existing ball valve sealing ring has the problem of unstable sealing under high and low pressure conditions, especially when it may leak at low pressure, and may wear or rust at high pressure, resulting in a lax seal.
A composite sealing ring is designed, a sealing ring body made of PEEK material, and a rubber elastic ring is embedded in the ring groove in the middle of the sealing surface. The rubber elastic ring protrudes from the sealing surface and remains sealed at low pressure. At high pressure, the elastic ring is squeezed and sealed together with the sealing ring body.
Maintain the reliability of the sealing ring under different working conditions, ensuring no leakage at low pressure and no wear at high pressure, improving the stability and durability of the seal.
Smart Images
Figure CN223089987U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sealing products, in particular to a composite sealing ring. Background Art
[0002] A sealing ring is usually installed at the groove of the valve seat of a ball valve as a sealing surface. In large-diameter ball valves, in order to ensure the sealing performance, hard seals are usually adopted. According to different usage scenarios, the material of the sealing ring is usually metal or special plastic. After long-term use, the sealing ring may be worn, and the valve body may also rust and generate debris to scratch the ball after long-term use, resulting in a gap between the ball and the sealing ring. In high-pressure medium usage scenarios, the medium pressure will tightly press the ball against the sealing ring to maintain the sealing performance. However, when the medium flow rate is low, the medium pressure is small, and due to the existence of the gap, medium leakage may occur. Summary of the Invention
[0003] Aiming at the deficiencies of the prior art, the utility model provides a composite sealing ring.
[0004] The technical solution provided by the utility model is as follows:
[0005] A composite sealing ring includes a sealing ring body. One side of the cross-section of the sealing ring body is a rectangular surface for installing on the valve seat of the valve, and the other side is a sealing surface for fitting the valve ball. A ring groove is provided in the middle of the sealing surface, and an elastic ring is provided in the ring groove. The elastic ring is vulcanized and fixed in the ring groove, and the outer side of the cross-section of the elastic ring is arc-shaped and protrudes outward from the sealing surface.
[0006] The elastic ring is made of rubber.
[0007] The sealing ring body is made of PEEK material.
[0008] The length of the long side of the cross-section of the ring groove is greater than half of the length of the long side of the cross-section of the sealing ring body.
[0009] The beneficial effects of the utility model: By providing a ring groove on the sealing surface of the sealing ring body, and vulcanizing and fixing an elastic ring with an outer side protruding from the sealing surface in the ring groove. When it is installed in the groove of the ball valve seat and in a low-pressure working condition, due to the fact that the elastic ring protrudes from the sealing surface, it can still maintain sealing with the ball. When in a high-pressure working condition, the elastic ring can be squeezed due to its elastic characteristics and serve as a sealing surface together with the sealing ring body, ensuring the reliability of the valve seal. Brief Description of the Drawings
[0010] Figure 1 It is a schematic cross-sectional view of an embodiment of the utility model;
[0011] Figure 2 It is an enlarged cross-sectional view of an embodiment of the utility model;
[0012] Figure 3 This is a schematic diagram of the installation of the embodiment of the present utility model on a valve seat. Specific embodiments
[0013] The embodiments of the present utility model will be further described below with reference to the accompanying drawings.
[0014] As Figure 1-2 shown, a composite sealing ring includes a sealing ring body 1 made of PEEK material. PEEK is a special engineering plastic with excellent comprehensive performance. In the application of sealing rings, especially in high-pressure sealing, due to its excellent compressive resistance, fatigue resistance, corrosion resistance, and temperature resistance, it can meet the sealing requirements of different occasions. One side of the cross-section of the sealing ring body 1 is a rectangular surface 11 for installation on the valve seat, and the other side is a sealing surface 12 for fitting the valve sphere. A ring groove 13 is provided in the middle of the sealing surface 12, and an elastic ring is provided in the ring groove 13. In this embodiment, the elastic ring 2 is made of rubber and can be made of fluororubber, hydrogenated nitrile rubber, perfluoroether rubber, ethylene propylene diene monomer rubber, etc. according to the actual use scenario. The elastic ring 2 is vulcanized and fixed in the ring groove 13, and the outer side of the cross-section of the elastic ring 2 is arc-shaped and protrudes outward from the sealing surface 12.
[0015] In this embodiment, the length of the long side of the cross-section of the ring groove 13 is greater than half of the length of the long side of the cross-section of the sealing ring body 1, so that there is a long enough part of the elastic ring 2 located in the ring groove 13 to prevent the elastic ring 2 from being unreliablely fixed due to vulcanization process problems and detaching during the frequent opening and closing of the valve.
[0016] See Figure 3 , the sealing ring body 1 is tightly fitted in the groove 102 of the valve seat 101. In the low-pressure working condition, since the elastic ring 2 protrudes from the sealing surface, it can still maintain sealing with the sphere 103. When in the high-pressure working condition, the elastic ring 2 can be extruded due to its elastic characteristics and serve as a sealing surface together with the sealing ring body to ensure the reliability of the valve seal.
[0017] The embodiments should not be construed as limitations of the present utility model. Any non-creative improvement based on the spirit of the present utility model should be regarded as within the protection scope of the present utility model.
Claims
1. A composite sealing ring, comprising a sealing ring body, characterized in that: One side of the cross-section of the sealing ring body is a rectangular surface for mounting on the valve seat of the valve, and the other side is a sealing surface for fitting the valve sphere. A ring groove is provided in the middle of the sealing surface, and an elastic ring is provided in the ring groove. The elastic ring is vulcanized and fixed in the ring groove. The outer side of the cross-section of the elastic ring is arc-shaped and protrudes outward from the sealing surface.
2. The composite sealing ring according to claim 1, wherein: The elastic ring is made of rubber.
3. A composite sealing ring according to claim 1, characterized in that: The sealing ring body is made of PEEK material.
4. A composite sealing ring according to claim 1, characterized in that: The length of the long side of the cross-section of the ring groove is greater than half of the length of the long side of the cross-section of the sealing ring body.