Disc swing check valve

Abstract

The invention provides a swing type check valve with valve clacks. The swing type check valve comprises a valve body, the valve clacks and springs with the number from one to n. The n valve clacks are arranged, one sides of the n valve clacks are connected in the valve body through rotating assemblies, and the n valve clacks are arranged around a bottom hole. The springs with the number from one to n are in one-to-one correspondence with the valve clacks. One ends of the springs with the number from one to n are connected with the corresponding valve clacks, and the other ends of the springs with the number from one to n are connected with the inner wall of the valve body. Elastic coefficients of the springs with the number from one to n are different from one another, and n is a natural number larger than or equal to 2. The swing type check valve with the valve clacks has the following beneficial effects that a one-way transportation function of fluid is achieved through opening and closing of the multiple valve clacks which are stacked in sequence. The swing type check valve is suitable for large-caliber pipelines. The farthest distance of the valve clacks rotating around a valve rod is small, potential energy generated by the valve clacks is smaller, impacts on the valve body are smaller, and the service life is longer. The closing speed of the valve clacks is higher, and the back flowing amount generated due to closing is smaller.

Description

technical field [0001] The invention relates to the technical field of fluid delivery controls, in particular to a swing check valve with a disc. Background technique [0002] Check valve is one of the most commonly used equipment in the process of fluid transmission. It refers to the valve that automatically opens and closes the disc by means of the pressure of the one-way flowing medium. It is also commonly called check valve, reverse flow valve and one-way valve. or back pressure valve. In most pipeline systems, one-way check valves are installed to prevent backflow of media, reverse rotation of pumps and drive motors, and protection of pipeline equipment from water hammer damage. [0003] Common types of check valves include: swing check valve, lift check valve, butterfly check valve, axial flow check valve. Among them, the swing check valve is the most widely used check valve structure at present, and the movement mode is to rotate around the rotating shaft on the val...

AI Technical Summary

Problems solved by technology

However, the existing check valves are difficult to apply to large-diameter pipelines. In this case, wafer-type double-disc swing check valves are currently used.

However, the reverse flow of this kind of check valve is large when it is closed, and the diameter of the part of the valve disc farther away from the valve stem is larger when it is opened and closed, so that the potential energy is larger when it rotates, and a larger impact force is generated for the check valve. adverse effect on the life of the valve

Images