Check valve

Abstract

The invention relates to the field of pipeline equipment, and discloses a check valve, which comprises a shell, a screw rod, a valve rod and a valve plate, wherein the shell forms a hollow tubular structure with a first connecting part and a second connecting part respectively arranged on two ends; a cavity is arranged in the middle; a sealing port is formed in a position, close to the first connecting part, in the cavity; the screw rod is arranged on the top part in the shell; a bearing is fixedly arranged on one end of the screw rod; the other end of the screw rod is connected onto the cavity; the valve rod penetrates through the bearing; the valve plate is fixedly connected with the valve rod. Therefore, the valve plate can drive the bearing to rotate under the action of the self-gravity, so that the sealing port is covered. The check valve has the advantages of durability, safety, convenience and the like.

Description

technical field [0001] The invention relates to the field of pipeline equipment, in particular to a check valve. Background technique [0002] The check valve refers to the valve that relies on the flow of the medium itself to automatically open and close the valve plate to prevent the backflow of the medium. It is also called a one-way valve, a reverse flow valve, and a back pressure valve. The check valve is a kind of automatic valve. Its main function is to prevent the reverse flow of the medium, prevent the reverse rotation of the pump and the drive motor, and discharge the medium of the container. [0003] In the wet desulfurization system, it is necessary to use an air supply system that requires forced oxidation air. The system generally consists of several oxidation fans connected in parallel, and supplies oxygen to the slurry tank through the main pipe. A check valve is installed at the air outlet of each oxidation fan. When the fan is in operation, the check valv...

AI Technical Summary

Problems solved by technology

Therefore, using traditional check valves in this system, the shaft and hinge may be worn out

[0007] 2. Once broken, the valve plate of the check valve will fall into the oxidizing air pipeline system and be brought into the slurry tank by the oxidizing air, causing production accidents

Moreover, the follow-up accident handling will be very cumbersome

[0008] 3. Since the check valve is specially installed in the pipeline system, it is very inconvenient to disassemble the pipeline every time the check valve is overhauled

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