Two-way pressure-bearing fluororubber fireproof butterfly valve

Abstract

The invention relates to a two-way pressure-bearing fluororubber fireproof butterfly valve, which comprise a valve body and a butterfly plate. The valve body is provided with a valve seat; the butterfly plate is provided with a sealing ring which forms a sealing pair with the valve seat, and a pressing plate which clamps and fixes the sealing ring on the butterfly plate from the right side of thesealing ring; the sealing surface of the sealing ring is a front conical surface of which the apex is positioned on the right side; a closed internal gap of a cavity is formed between the sealing ring and the pressing plate; the pressing plate is provided with a pressure guide through hole for communicating the cavity with a space on the right side of the pressing plate; the left side face of thesealing ring is an internal conical surface of which the apex is positioned on the right side and a bus and a central line form an included angle of 90 degrees to beta; and an elastic fireproof ring is arranged in a gap area between the left side face of the sealing ring and the butterfly plate. Through designs of the cavity, the pressure guide through hole and the elastic fireproof ring, the butterfly valve integrates various functions of two-way sealing, fire prevention and fine adjustment, has a simple structure, high manufacturability, low processing difficulty and a wide pressure application range, and is particularly suitable to be used under high pressure.

Description

technical field [0001] The invention relates to a butterfly valve, in particular to a bidirectional pressure-bearing fluorine rubber fireproof butterfly valve which integrates bidirectional sealing, fireproofing and fine-tuning functions and is suitable for a wide working pressure range. Background technique [0002] At present, most of the PTFE sealed butterfly valves with eccentric structure only have the function of one-way sealing, and there is no fireproof design. Such a structure has many disadvantages, such as: 1. The PTFE sealing ring itself has no elasticity, and it is easy to deform when it is under pressure. After the pressure is released, the PTFE sealing ring is prone to plastic deformation, and the sealing size changes after a period of time. It is prone to medium leakage; 2. The sealing ring itself has no automatic adjustment function, and can only be replaced after leakage; 3. There is no fire prevention function, etc. Contents of the invention [0003] In...

AI Technical Summary

Problems solved by technology

Such a structure has many disadvantages, such as: 1. The PTFE sealing ring itself has no elasticity, and it is easy to deform when it is under pressure. After the pressure is released, the PTFE sealing ring is prone to plastic deformation, and the sealing size changes after a period of time. It is prone to medium leakage; 2. The sealing ring itself has no automatic adjustment function, and can only be replaced after leakage; 3. There is no fire prevention function, etc.

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