Double direction pressure metal finger stock butterfly valve

Abstract

The invention relates to a two-way pressure metal finger stock butterfly valve. The two-way pressure metal finger stock butterfly valve comprises a butterfly plate, a valve rod, a valve body and a hand ring, wherein the valve rod is fixedly connected with the butterfly plate arranged in the valve body; a sealing ring is fixedly mounted on one side of the butterfly plate through fastening bolt; a finger stock type U-shaped movable valve seat is arranged on one side of the sealing ring, and is arranged inside the valve body; the hand ring is arranged on the other side of the finger stock type U-shaped movable valve seat, and is fixedly connected with the finger stock type U-shaped movable valve seat through a connecting bolt; an elastic boss is arranged on the inner diameter of the finger stock type U-shaped movable valve seat; the inner diameter end surface of the elastic boss is in sealed fit with the outer diameter end surface of the sealing ring to form a seal pair; a U-shaped groove is formed in the elastic boss; the opening of the U-shaped groove faces towards the hand ring; a plurality of adjusting bolts are arranged on the hand ring; the lower end of each adjusting bolt penetrates through the hand ring and is in contact with the elastic boss. The two-way pressure metal finger stock butterfly valve has a simple structure, can realize squeezing on the U-shaped groove of the elastic boss through the adjusting bolts, so that the U-shaped groove is totally jointed with the sealing ring; the two-way sealing effect is achieved, and the service life of the product is prolonged.

Description

technical field [0001] The invention relates to a bidirectional pressure all-metal reed type butterfly valve, which belongs to the technical field of butterfly valves. Background technique [0002] The valve seat of the existing butterfly valve hard sealing structure is in the valve body, and the sealing effect of the sealing pair is achieved by adjusting the gasket on the back of the valve seat to achieve the sealing effect. However, this structure has certain limitations. The accumulation of various processing tolerances leads to increased assembly difficulty and low efficiency. Due to the relatively difficult adjustment, the torque gap of the same product is large, the service life of the sealing pair is short, and it is difficult to achieve a two-way sealing effect. SUMMARY OF THE INVENTION [0003] In view of the above defects, the purpose of the present invention is to provide a two-way pressure all-metal reed butterfly valve with a simple structure, no need to adjus...

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Problems solved by technology

[0002] The valve seat of the existing butterfly valve hard seal structure is in the valve body, and the sealing ratio of the sealing pair is achieved by adjusting the gasket on the back of the valve seat to achieve the sealing effect, but this structure has certain limitations. The accumulation of various processing tolerances leads to increased assembly difficulty and low efficiency. Due to the relatively large adjustment difficulty, the torque gap of the same product is large, the service life of the sealing pair is short, and it is difficult to achieve a two-way sealing effect.

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