Differential pressure opening and closing check valve

Abstract

The invention discloses a pressure difference-based opening and closing check valve. A valve body (2) is provided with a valve inlet (3), a valve outlet (6) and a high pressure port (8); a hydraulic cylinder is arranged in the valve body (2), the inner side of the high pressure port (8) is provided with a piston (9), the piston (9) is connected with the hydraulic cylinder through a guidance support (4), a valve sheet (5) is mounted in the valve outlet (6), and the valve sheet (5) is connected with the other end of the hydraulic cylinder through a connecting rod. A water inlet end outlet and a water outlet end outlet on a circulation pipeline are driven by pressure difference to stop the phenomenon that the circulating water flows back to the equipment, a water support system is steady in work, clear and concise in structure, easy to manufacture, mount and maintain, steady in operation, safe and convenient to maintain and use, installation-space-saving and cost-saving, energy-saving, environment-friendly, and outstanding in application effect.

Description

technical field [0001] The invention belongs to the heating / cooling cycle device technology, and is used to prevent high-level water from flowing back, especially a differential pressure opening and closing check valve. Background technique [0002] In the prior art, atmospheric boilers are used for direct heating and water evaporation chillers for cooling. When the position of boilers and chillers is lower than the load, the return flow of high-level water cannot be accommodated after the pump is stopped. Heating / cooling in open systems and high-rise buildings requires heat exchange. The device uses secondary water for heating / cooling. Obviously, these general-purpose technologies have a substantial increase in equipment investment, equipment takes up a large space for heat exchange, and there is a temperature difference. , separated from the open system, backwater driven by differential pressure. After retrieval, no practical improvement technology disclosure was found. ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a pressure differential opening and closing check valve to solve the high water flow when the water source in the open system is at a low level, and solve the heating / cooling cycle with an economical method and structure. After the pump is stopped, adjust the water flow direction in time to return the high water.

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