Double-way check valve

Abstract

The invention discloses a double-way check valve. The double-way check valve comprises a valve body, a first valve cover and a second valve cover. The first valve cover is in threaded connection withone end of the valve body through bolts; the second valve cover is in threaded connection with the other end of the valve body through bolts; a first flange plate is fixedly connected to the bottom ofthe first valve cover; a second flange plate is fixedly connected to the top of the second valve cover; a water outlet is formed in the center of the second flange plate; water entering springs are symmetrically and fixedly connected to the inner wall of the first valve cover; a water entering valve plate is fixedly connected to the ends, far away from the first valve cover, of the water enteringsprings; water outflowing valve plates are symmetrically and rotationally connected to the inner wall of the second valve cover through hinges; water outflowing springs are fixedly connected to the centers of the water outflowing valve plates; and the ends, far away from the water outflowing valve plates, of the water outflowing springs are fixedly connected with the second valve cover. Accordingto the double-way check valve, water can be prevented from flowing back into a water pump in time by additionally arranging the water entering springs, and water can be prevented from flowing back into the valve body by additionally arranging the water outflowing valve plates.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a two-way check valve. Background technique [0002] The check valve refers to the valve that automatically opens and closes the disc depending on the flow of the medium itself, and is used to prevent the reverse flow of the medium. As well as the discharge of the container medium, the existing check valve does not stop the water backflow in time when the water pump is stopped, and often there will be water flowing back into the water pump, so that the effect of stopping the water backflow cannot be achieved, which will affect the next work of the water pump . [0003] Existing water stop valves are all one-way water stop and return, and the scope of use is limited. When the water pump is shut down, if the liquid in the pipe is not discharged in time, the pipe will be frozen and damaged. Therefore, it is necessary to The water flow is isolated from the valve body, preventing the...

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Problems solved by technology

[0002] The check valve refers to the valve that automatically opens and closes the disc depending on the flow of the medium itself, and is used to prevent the reverse flow of the medium. As well as the discharge of the container medium, the existing check valve does not stop the water backflow in time when the water pump is stopped, and often there will be water flowing back into the water pump, so that the effect of stopping the water backflow cannot be achieved, which will affect the next work of the water pump

[0003] Existing water stop valves are all one-way water stop and return, and the scope of use is limited. When the water pump is shut down, if the liquid in the pipe is not discharged in time, the pipe will be frozen and damaged. Therefore, it is necessary to The water flow is isolated from the valve body to prevent the water flow in the valve body from seeping into the pump

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