An easily adjustable anti-backflow check valve and its operating method

Abstract

The invention provides an anti-backflow type check valve convenient to adjust and an operation method thereof. The anti-backflow type check valve convenient to adjust comprises a sealing valve body, alifting piston, a supporting clamping seat splicing snap ring and a sealing rotating shaft, wherein a rotary adapter tube is fixedly arranged on the outer surface of the front end of the sealing valve body; the sealing valve body is in through connection with a communicating pipe through the rotary adapter tube; locking joints are fixedly arranged on the outer surfaces of the two ends of the communicating pipe; the upper parts of the locking joints are movably in sleeve connection with butt joint casing pipes; the locking joints and the butt joint casing pipes are in butt joint and fixed through thread bases; and a plurality of groups of limited circular slots are formed in the inner sides of the upper parts of the butt joint casing pipes in a penetrating manner. The check valve has a pressure adjusting structure, so that the range of application of the check valve is widened, the check valve can be rotated at multiple angles after being installed, the flexibility of the check valve is improved, meanwhile the installation and operation of the check valve are relatively convenient, and the looseness phenomenon of the check valve is avoided.

Description

technical field [0001] The invention belongs to the technical field of valves, and in particular relates to a reverse flow check valve, in particular to an easy-to-adjust anti-backflow check valve and an operating method thereof. 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 in structure to the globe valve, only lacking the valve stem to drive the disc. The medium flows in from the inlet end (lower side), and flows in from the outlet end ( When the inlet pressure is greater than the sum of the weight of the valve disc and its flow resistance, the valve is opened; otherwise, the valve is closed when the medium flows backwards. The s...

AI Technical Summary

Problems solved by technology

The disadvantage is that the resistance is large and the sealing is poor when closed;

[0003] Existing check valve equipment has certain drawbacks in the use process. The traditional check valve does not have a pressure regulating structure, so that a single type of check valve can only block the medium pressure produced by its own weight, but cannot According to the needs of users, different pressure adjustment operations are performed. The traditional check valve is installed with the pipeline through a bolt-type fixed structure, which makes the installation operation of the check valve more laborious and increases the difficulty of installation of the check valve. Traditional The check valve does not have a rotary adjustment structure, so that after the check valve is installed and fixed, the user cannot perform multi-angle rotation adjustment operations, which reduces the flexibility of the check valve during use and brings certain disadvantages to the user. influences

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