Check valve for petroleum pipeline transportation and using method thereof

Abstract

The invention relates to the technical field of petroleum exploitation, in particular to a check valve for petroleum pipeline transportation and a using method thereof.The check valve comprises a check valve body, a check valve oil inlet and a check valve oil outlet are formed in the check valve body, and a stop plate is rotationally arranged in the check valve oil inlet; a stop plate is arranged in the check valve body, a stop brake mechanism is arranged on the portion, on one side of the stop plate, of the check valve body, the stop plate is used for conducting pressure reduction sealing on the check valve oil inlet, a sealing plate is rotationally arranged in the check valve oil outlet, and one end of the sealing plate is arranged in the check valve oil outlet through a spring. The stop plate in the oil inlet of the check valve and the sealing plate in the oil outlet of the check valve can conduct sealing immediately after petroleum transportation is stopped, reverse backflow of petroleum is prevented, the flow stopping effect is obviously enhanced, meanwhile, the stop plate in the oil inlet of the check valve and the sealing plate in the oil outlet of the check valve can further achieve the pressure reducing effect, and the sealing effect is greatly improved. The structure is simple, resistance is small, and the sealing effect is good.

Description

technical field [0001] The invention relates to a check valve and a using method thereof, in particular to a check valve used for oil pipeline transportation and a using method thereof, and belongs to the technical field of oil exploitation. Background technique [0002] Check valve refers to a valve whose opening and closing part is a circular disc and acts to block the reverse flow of the medium by its own weight and medium pressure. It is an automatic valve, also known as check valve, one-way valve, return valve or Isolation valve, the disc movement mode is divided into lift type and swing type. The lift check valve is similar to the globe valve in structure, only lacking the valve stem to drive the disc. The medium flows in from the inlet end and flows out from the outlet end. [0003] In the transportation of petroleum, the traditional principle of the valve body is: when the inlet pressure is greater than the sum of the weight of the valve disc and its flow resistance,...

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Problems solved by technology

[0003] In the transportation of petroleum, the traditional principle of the valve body is: when the inlet pressure is greater than the sum of the weight of the valve disc and its flow resistance, the valve is opened; on the contrary, the valve is closed when the medium flows back. It will lead to greater resistance. In addition, long-term use will cause different degrees of wear, poor sealing when closed, and significantly reduced cut-off efficiency.

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