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1. Frequency and constant pressure water supply: When the municipal pipe network water supply is greater than the user's water consumption, the stable tank type Shaanxi non-negative pressure water supply equipment is used for constant pressure water supply. At this time, a certain amount of confined water is stored in the stable tank.
2. Eliminating negative pressure: When the user's water consumption increases, the pressure at the connection between the municipal pipe network and the stable tank decreases, and when the pressure drops below the relative pressure of 0, a negative pressure is formed in the stable tank. The intake valve of the vacuum suppressor opens. The atmosphere enters the stable tank. At this point, the holding tank is equivalent to an open water tank with a free liquid surface, the pressure is the same as the atmosphere, and the negative pressure is eliminated. When the water level drops to the set value, the liquid level controller transfers the control signal to the control system in the variable frequency control cabinet, controls the pressurization unit to stop working, and the user stops the water; when the user's water consumption decreases, the water level in the steady tank rises, and the gas Excluded from the vacuum suppressor exhaust valve, after the pressure returned to normal, the pressurization unit restarts automatically to restore the water supply.
3. Stop function of water stop: When the municipal pipe network stops water, the pressurization unit will automatically stop running under the control of the liquid level controller. After the water supply to the municipal pipe network is restored, it will automatically resume normal water supply.
4, a small amount of sleep function: the user does not use water or water consumption is very small device automatically enters hibernation (downtime) and maintains the water supply pressure, the user automatically wakes up when the user restores water, and resume normal water supply.
5, power outages continue to supply water: When the community outage, the municipal pipe network continues to supply water to low-zone users, power outages stop water. After the equipment resumes power supply, it will automatically start up and resume normal water supply.
Installation Precautions Before installation, it should also check whether the external environment meets the installation conditions of Shaanxi without negative pressure water supply equipment. 1. No negative pressure water supply equipment in Shaanxi transmission medium: hot and cold clean, non-flammable and non-explosive, and free from solid particles or fibers. liquid.
2, liquid temperature: room temperature -15 °C to +70 °C hot water +70 °C to +120 °C
3, the surrounding environment: no water droplets, steam, no floating dust Egyptian metal particulate sites. No sunlight, high temperature and severe dust. No corrosion, flammable gases and liquids.
4, no vibration, maintenance check easy place.
5, ambient temperature: high +45 °C and well-ventilated.
Among them, the following points should be noted during the installation of Shaanxi's non-negative pressure water supply equipment. 1. Before installation, check whether there is any hard material in the pump body to avoid damaging the impeller and the pump body during operation.
2. It is not allowed to add the piping capacity to the pump during installation so as to avoid deformation of the pump and affect normal operation.
3. Tighten the anchor bolts to avoid vibration at start-up affecting the performance of the pump.
4. Install the regulating valve on the inlet and outlet pipes of the pump, and install a pressure gauge near the pump outlet to control the pump to run within the rated working conditions to ensure the normal use of the pump.
5, discharge pipe, such as the installation of check valve should be installed outside the valve.
6, the installation of the pump is divided into rigid connection installation and flexible connection installation.
Shaanxi constant pressure frequency conversion water supply equipment is mainly composed of water pump unit, pressure and pressure regulator tank, pressure sensor, frequency conversion control cabinet, etc. It can always maintain the pressure gauge pressure (ie the user pipe network water pressure) equal to the user set value, suitable for general life Or produce water supply.
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No negative pressure water supply equipment in Shaanxi working principle and installation must know knowledge
The stable tank type Shaanxi non-negative pressure water supply equipment is directly connected with the municipal pipe network, and the water supply is cascaded on the basis of the residual pressure of the municipal pipe network.