Small-caliber check valve

Abstract

The invention relates to a small-caliber check valve which comprises an inflating valve fixing plate. An air intake end socket and an air exhaust end socket are connected to the two sides of the inflating valve fixing plate, the inflating valve fixing plate is provided with a plurality of installation holes, inflating valves are fixedly installed in the installation holes, the two ends of the inflating valves are located in cavities of the air intake end socket and the air exhaust end socket, air intake holes which extend from the air intake end socket cavity to the air exhaust end socket cavity are formed in the inflating valves, openings of the air intake holes are located in the cavity of the air intake end socket, the portions, located in the cavity of the air exhaust end socket, of the inflating valves are provided with air exhaust holes, the air exhaust holes communicate with the air intake holes, the portions, on the outer side of the air exhaust holes, of the inflating valves are sleeved with elastic rubber tubes, the inflating valves are provided with positioning grooves for positioning the elastic rubber tubes, and the air intake end socket and the air exhaust end socketare connected with a pipeline. According to the small-caliber check valve, gas one-way conveying is achieved, backflow is prevented, the flow requirement for the valve is met by adopting the multiplesmall-caliber inflating valves, and sealing invalidation caused by mechanical faults due to poor sealing performance of a conventional check valve and spring fatigue is avoided.

Description

technical field [0001] The invention relates to a check valve, in particular to a small-diameter check valve. Background technique [0002] Check valves are often used in electric power, pneumatic conveying dust collection systems under electric dust removal in steel mills, and are used to prevent the residual pressure from flowing back into the main pipe of the air source after the pipeline pressurized material is conveyed. Dust will be deposited at the elbow of the pipeline, which will cause the elbow of the air source pipeline to be washed next time the pipeline is pressurized, and it will also cause erosion of the valve core of the check valve, resulting in damage to the air source pipeline and the check valve. wear and tear. However, the lift and swing check valves that are common on the market have low design requirements and poor sealing performance, and the automatic rebound device (spring) is prone to fatigue, so that the sealing performance cannot be guaranteed. ...

AI Technical Summary

Problems solved by technology

[0002] Check valves are often used in electric power, pneumatic conveying dust collection systems under electric dust removal in steel mills, and are used to prevent the residual pressure from flowing back into the main pipe of the air source after the pipeline pressurized material is conveyed. Dust will be deposited at the elbow of the pipeline, which will cause the elbow of the air source pipeline to be washed next time the pipeline is pressurized, and it will also cause erosion of the valve core of the check valve, resulting in damage to the air source pipeline and the check valve. wear and tear

However, the lifting and swing check valves that are common on the market have low design requirements and poor sealing performance, and the automatic rebound device (spring) is prone to fatigue, which makes it impossible to guarantee its sealing performance.

Images