Full automatic constant pressure water supply device
Product overview
The utility model relates to an automatic water supply constant pressure device, which is composed of a water supply pump, a diaphragm pressure tank, a control cabinet, an electric contact pressure gauge and a pipeline accessory. Water pipeline successively through the water inlet pipe, valve, water pump, check valve, outlet pipe connected to the water; drain line connected through a water outlet pipeline and the inlet pipeline. The electric contact pressure gauge and pressure signals are transmitted to the control system in the pipeline, through program control automatic constant pressure water pump high pressure pump, low start, stop, pressure control in a certain range, the equipment stable performance, compact structure, convenient installation.
Two, working principle
The automatic water supply constant pressure device adopts the static pressure of the system as the initial pressure head of the design of the expansion tank, and the pressure of the hot water in the water tank is used to ensure the pressure of the inner end of the expansion tank. The initial operation of the first start of the water pump to the system and the water tank in the water tank filled with water, the system is filled with excess water into the capsule. Because of the compressibility of water, with the increase of water volume, the volume of the water chamber is constantly expanding and the compressed air chamber, the pressure inside the tank is also rising. When the pressure reaches the design pressure, the pressure controller is used to close the feed pump. When the water in the system thermal expansion makes the system pressure exceeds the design pressure, excess water through the exhaust valve to fill the tank when the recycled water in the system due to leakage or temperature drop and the volume is reduced, the system pressure decreases, the pressure drop in the capsule water was constantly pressed into the network of the system, when the minimum pressure to allow the design of system pressure, the water pump restart to supply pipelines and the gas pressure tank through the pressure controller, so the cycle.
Three, product characteristics: 1 this product has the function of regulating over pressure, under voltage, overload, short circuit, broken phase, low liquid level and so on. 2 adjustment of high precision, generally can reach 0.01MPa, the system pressure is always maintained at the set value unchanged. 3 compact structure, small footprint, easy maintenance. Four, 1 suitable for production, fire, pressure water supply system pressure device, air conditioning system and circulating water system, industrial and civil boiler circulation system. Constant pressure water supply device and hot water circulation system of 2 hot water heating system. 3 geothermal heating system, water source heat pump. 4 boiler automatic voltage stabilizing expansion device (pneumatic tank, etc.). 5 hot water heating automatic voltage stabilizing expansion device (pneumatic tank, expansion tank, etc.)