An integral double-block double-discharge ball valve

Abstract

The invention discloses an integrated double-blockage double-discharge ball valve which comprises a first connection pipe, a valve body and a second connection pipe. The second connection pipe is arranged on one side, away from the first connection pipe, of the valve body. The ball valve has the advantages that by arranging a first upper spring, a first lower spring, a first upper sealing block and a first lower sealing block, the valve body and a valve ball are hermetically connected, and liquid leakage is avoided; by arranging a first layer sealing ring and a second layer sealing ring, connection between a valve rod and the valve body has higher sealability, and liquid is ensured not to leak from a joint of the valve rod and the valve body; by arranging an internal thread and a rod thread, rotating connection between a rotating rod and the valve body is more stable; by arranging a drainage pipe, a blockage ball, the rotating rod, a rotating ring and a rod sealing ring, liquid in thevalve body is discharged for testing when a first ball valve and a second ball valve are closed.

Description

technical field [0001] The invention relates to the field of valve equipment, in particular to an integral double-block double-discharge ball valve. Background technique [0002] Valves are created along with the creation of fluid lines. In valve technology, integral double-block double-discharge ball valves are widely used in hydraulic system pipelines in various industries such as electric power, petrochemical, metallurgy, marine, natural gas, gas, and pharmaceuticals. [0003] The Chinese patent with application number 201320766316 discloses an integral double-block double-discharge ball valve, including a stuffing box assembly, a lower fixed shaft assembly, a ball assembly, a valve seat assembly, a sealing end cover assembly, and a main body assembly. [0004] In the above-mentioned patents, the sealing effect at the connection between the valve ball and the valve body is average, and leakage is likely to occur, so that the liquid in the ball valve is easy to leak. At t...

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Problems solved by technology

[0004] In the above-mentioned patents, the sealing effect at the connection between the valve ball and the valve body is average, and leakage is likely to occur, so that the liquid in the ball valve is easy to leak. At the same time, the sealing effect of the connection between the valve stem and the valve body on the existing valve ball is poor, and , the existing ball valve lacks the device for releasing the liquid in the valve body, so that the liquid inside the valve body cannot be released for detection. Stablize

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