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Three-eccentric metallic hard sealed butterfly valve

A hard seal, three-eccentric technology, applied in the direction of valve lift, valve device, engine components, etc., can solve problems such as valve leakage, unsatisfactory sealing effect, and reduced sealing effect, and achieve the effect of reasonable structure

Inactive Publication Date: 2012-04-25
江苏华立控制阀有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the triple eccentric metal hard-sealed butterfly valves we have seen have mismatching shapes and angles between the sealing surface of the valve body and the sealing surface of the sealing ring in actual work, and zero leakage cannot be achieved. The multi-layer sealing ring is washed by the front of the medium. Problems such as leakage during reverse pressure
The original triple-eccentric butterfly valve uses multi-layer (stainless steel + graphite) as the sealing ring, but the original triple-eccentric butterfly valve has the disadvantages of multi-layer resistance to erosion when the valve is fully open, and the sealing effect decreases after long-term erosion.
Some manufacturers directly use the whole metal to seal or surfacing the sealing surface on the valve plate, but the sealing effect is not ideal

Method used

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Examples

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Embodiment Construction

[0013] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0014] Example figure 1 As shown, this embodiment provides a triple eccentric metal hard-sealed butterfly valve, including a valve plate 1, a valve body 2, a sealing ring 3, a pressure plate 4 and a valve stem 6, the axis of the valve stem 6 is connected to the valve plate of the valve stem 6 1 The sides are relatively eccentric, and are relatively eccentric with the axis of the valve body 2. The sealing ring 3 is set in the sealing groove where the valve plate 1 and the pressure plate 4 are pressed together, and on the sealing surface of the sealing ring 3 that contacts the pressure plate 4 An annular U-shaped groove 5 is provided, and there is a gap between the notch of the U-shaped groove 5 of the sealing ring 3 and the sealing surface of the outer periphery and the pressure plate 4, and the gap is 0.1 mm to 0.3 mm. The sealing ring 3 It ...

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Abstract

The invention discloses a three-eccentric metallic hard sealed butterfly valve, which comprises a valve plate, a valve body, a sealing ring, a pressure plate and a valve rod, wherein the axis of the valve rod is eccentric relative to the lateral surface of the valve plate connected with the valve rod and eccentric relative to the axis of the valve body; the sealing ring is arranged in a sealing groove pressed by the valve plate and the pressure plate; and the sealing face of the sealing ring in contact with the pressure plate is provided with an annular U-shaped groove. The three-eccentric metallic hard sealed butterfly valve has reasonable structure, is erosion-resistant compared with the prior art, and realizes zero linkage in forward and reverse sealing.

Description

technical field [0001] The invention relates to a butterfly valve, in particular to a triple eccentric metal hard seal butterfly valve. Background technique [0002] At present, the three-eccentric metal hard-sealed butterfly valves we have seen have mismatching shapes and angles between the sealing surface of the valve body and the sealing surface of the sealing ring in actual work, and zero leakage cannot be achieved. The multi-layer sealing ring is washed by the front of the medium. Problems such as leakage during reverse pressure. The original triple eccentric butterfly valve uses multi-layer (stainless steel + graphite) as the sealing ring, but the original triple eccentric butterfly valve has the disadvantages that the multi-layer is not resistant to erosion when the valve is fully opened, and the sealing effect decreases after long-term erosion. Some manufacturers directly use integral metal to seal or surfacing the sealing surface on the valve plate, but the sealing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/226F16K1/32
Inventor 宗炳松
Owner 江苏华立控制阀有限公司
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