A triple eccentric sealing butterfly valve with a sealing ring

A sealing ring and triple eccentric technology, which is applied in the field of triple eccentric sealing butterfly valves, can solve problems such as high machining accuracy requirements, influence of butterfly valve application range, unbalanced torque of medium, etc., achieve good sealing effect, improve opening and reverse sealing performance , Reduce the effect of unbalanced moment

CN105156699BActive Publication Date: 2017-09-22CSIC SPECIAL EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-09-22

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Abstract

The invention discloses a seal-ring-bearing three-eccentric seal butterfly valve, relating to the field of valves. The seal-ring-bearing three-eccentric seal butterfly valve comprises a valve body, an operating mechanism, a disk plate assembly and a valve stem, wherein the operating mechanism is positioned outside the valve body; one end of the valve stem is positioned outside the valve body and connected with the operating mechanism, and the other end is positioned inside the valve body and connected with the disk plate assembly; a valve body sealing surface used for matching with the disk plate assembly is arranged inside the valve body; the disk plate assembly comprises a disk plate, a pressure plate and a seal ring; the seal ring comprises a seal end and a fixed end; the fixed end is positioned between the disk plate and pressure plate; the seal end is positioned outside the disk plate, and used for matching with the valve body sealing surface; and the cross-section area of the seal end is smaller than that of the disk plate. The seal-ring-bearing three-eccentric seal butterfly valve can implement zero medium leakage, well improve the opening and reversing sealing properties, and widen the application range of the three-eccentric seal butterfly valve.
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Description

technical field

[0001] The invention relates to the field of valves, in particular to a triple-eccentric sealing butterfly valve with sealing rings. Background technique

[0002] Butterfly valve is a regulating valve with simple structure, and it can also be used for switch control of low-pressure pipeline medium. Butterfly valve usually includes valve body, valve stem, disc plate and sealing ring. Inside, the valve stem is connected to the disc, and the sealing ring is matched with the disc.

[0003] Traditional butterfly valves are usually used in occasions with normal temperature, low pressure and low sealing requirements. However, with the continuous development of modern technology and material industry, in order to meet the requirements of various working conditions, butterfly valves have experienced successively from concentric to single eccentric, Evolution of double and triple eccentricity. Due to its excellent performance, triple eccentric butterfly valves are wi...

Examples

Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0026] see figure 1 As shown, the embodiment of the present invention provides a triple eccentric sealing butterfly valve with a sealing ring, including a valve body 2, an operating mechanism 8, a disc assembly 4 and a valve stem 3, the valve body 2 is a cavity structure, and the valve body 2 There is a valve body sealing surface 19 for matching with the disc assembly 4 inside. One end of the valve stem 3 is located outside the valve body 2 and connected to the operating mechanism 8, and the other end is located inside the valve body 2 and connected to the disc assembly 4. connected, when the operating mechanism 8 rotates, the valve rod 3 can drive the disc assembly 4 to rotate.

[0027] The bottom of the valve body 2 is provided with a lower end cover 7, and a split ring 6 is provided between the end of the valve stem 3 away from the operati...