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Composite elastic soft sealing

A soft-sealing, composite technology, applied in the direction of lift valve, cock including cut-off device, engine components, etc., can solve the problems of easy falling off, difficult connection between sealing rubber and valve seat, etc., to achieve firm adhesion, simple structure, processing and installation. handy effect

Inactive Publication Date: 2003-04-09
SHANGHAI KARON VALVES MACHINERY
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AI Technical Summary

Problems solved by technology

Valve seals are usually divided into two categories: soft seals and hard seals. Among them, soft seals are mainly non-metal-to-metal such as rubber and plastic. The processing accuracy of the sealing surface is not high, but it is only suitable for places with a pressure below 2.5MPa; and The sealing rubber is difficult to connect with the valve seat, and it is easy to fall off during use

Method used

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Embodiment Construction

[0017] like figure 1 As shown in the figure, the composite elastic soft seal of the present invention is composed of a valve flap sealing ring 1 and a valve seat sealing ring 2. The valve seat sealing ring 2 is embedded in the valve seat 4, and the valve seat 4 has a tooth-shaped groove. After the sealing ring 2 is embedded in the valve seat 4, silicone rubber (ie, the sealing ring gasket 3) is injected. That is to say, the sealing ring is a double-layer composite structure, which is composed of a valve seat sealing ring 2 and a sealing ring gasket 3, and the sealing ring gasket 3 is injected and cured in a glue-like manner after the sealing ring 2 is installed. The valve seat sealing ring 2 and the valve seat 4 are connected in a toothed mosaic manner. Relying on the resilience of the valve seat sealing ring 2 to ensure the sealing, the specific pressure between the valve disc sealing ring 1 and the valve seat sealing ring 2 is increased, and the sealing performance is impro...

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Abstract

The composite elastic soft sealing is double-layered composite sealing structure embedded inside toothed groove of valve seat. There are elastic matter in the bottom of the groove and metal sealing ring on valve clack. The sealing pair between the valve body and the valve crack is metal and rubber, rubber is embedded into groove and fixed with injected silicon rubber, and the metal for sealing isintegrated with or attached to the valve clack. The composite sealing ring has excellent resilience and thus high sealing performance and high sealing pressure. The present invention is suitable for ball valve, butterfly valve, cock valve and other rotating shaft valve.

Description

technical field [0001] The invention relates to a composite elastic soft seal, which is a valve seal type, belongs to the field of mechanical valves, and is suitable for rotary shaft valves such as ball valves, butterfly valves and plug valves. Background technique [0002] Valve sealing is the most critical technology in valve design and application. Valve seals are usually divided into two categories: soft seals and hard seals. Among them, soft seals mainly use non-metal-to-metal such as rubber and plastic. The machining accuracy of the sealing surface is not high, but it is only suitable for places where the pressure is below 2.5MPa; and The sealing rubber is difficult to connect with the valve seat, and it is easy to fall off during use. This is an urgent problem to be solved in this field. SUMMARY OF THE INVENTION [0003] The composite elastic soft seal of the present invention solves the defects existing in the prior art through the following technical solutions: ...

Claims

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Application Information

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IPC IPC(8): F16K1/226F16K5/08
Inventor 李政宏
Owner SHANGHAI KARON VALVES MACHINERY
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