2results about How to "Cases to prevent backflow" patented technology

This utility model discloses a dual-condition cooling and heating integrated device for a feed pump, relating to the field of dual-condition feed pump technology. It includes a base, an electrical box, a material box, a storage box, a dual-condition feed pump, a cooling assembly, a cooling mechanism, a heating mechanism, and a material extraction mechanism. The bottom of the dual-condition feed pump is fixedly connected to the top of the base near the rear side of the electrical box. A material extraction pipe is fixedly connected to the output end of the dual-condition feed pump, and a feed pipe is fixedly connected to the input end of the dual-condition feed pump. A diversion pipe is fixedly connected to the outer wall of the feed pipe near the left side of the cooling assembly, and a one-way valve is provided on the outer wall of the feed pipe near the right side of the diversion pipe. This utility model, by operating the dual-condition feed pump, can cool the conveyed material when the temperature is high through the cooling assembly and cooling mechanism, and heat the material when the temperature is low by conveying it through the diversion pipe via the extraction pipe and then heating it through the heating mechanism.

The present application belongs to the technical field of check valve, especially relates to a rocker arm type anti-backflow high-efficiency check valve, which comprises a valve body, the valve body is fixedly connected with a rocker arm frame through a screw, the lower end of the rocker arm frame is rotatably connected with a rocker arm through a pin shaft, the rocker arm is fixedly installed with a valve clack assembly, the front end of the valve clack assembly abuts against a valve seat arranged in the valve body, the valve clack assembly stores a counterweight liquid, a counterweight adjusting assembly is arranged at the rotatable connection position of the pin shaft and the rocker arm, when fluid flows through the check valve in a forward direction, the counterweight liquid stored in the valve clack assembly is transferred into the pin shaft through the counterweight adjusting assembly, the weight of the valve clack assembly is reduced, the resistance to fluid is reduced, and the fluid can flow through the check valve quickly, when the fluid stops flowing through the check valve, the counterweight adjusting assembly transfers the counterweight liquid in the pin shaft back into the valve clack assembly, thereby increasing the weight of the lower end of the valve clack assembly, the valve clack assembly is tightly pressed against the valve seat, and the backflow of fluid is effectively prevented.