Negative-pressure-free water supply equipment

Abstract

The invention provides negative-pressure-free water supply equipment. When the equipment works and the pressure of tap water is normal, a solenoid valve is at a closed position, and a three-way type hydraulic conversion device is opened to communicate a water inlet manifold, so that all pumps in a pump set can be used for supplying water to users through overlapping pressure of the tap water; when the pressure of the tap water cannot meet the utilization of the pressure overlapped pump set, a spare pump in the pump set is automatically controlled by a system to play a role of a booster pump, the solenoid valve is switched on, and the booster pump starts to work; the pressure of the booster pump enforces the three-way type hydraulic conversion device to be closed so that the booster pump can be used for boosting reserved water in a water tank and supplying the water to the pressure overlapped pump with the tap water through the three-way type hydraulic conversion device at the same time, so as to overcome a phenomenon that the pressure of the tap water is not enough; the operation condition of the pressure overlapped pump basically keeps unchanged and the aim of saving energy is realized.

Description

technical field [0001] The invention relates to a non-negative pressure water supply equipment, in particular to a box-type non-negative pressure water supply equipment. Background technique [0002] The box-type non-negative pressure water supply equipment in the prior art generally has two structural modes. One is to install a small booster pump and a stacked pump in series at the water outlet of the water tank to solve the problem of boosting the water in the tank when the tap water has negative pressure. Finally, to meet the flow requirements of the stack pump, the head of the stack pump can be reduced by subtracting the tap water pressure to reduce the power, but the disadvantages of this method are high manufacturing cost, high installation strength, difficult control method, and large water pressure fluctuations. Another way is not to configure a booster pump. The power of the stacked pump is increased according to the full head configuration. When the tap water gener...

AI Technical Summary

Problems solved by technology

[0002] The box-type non-negative pressure water supply equipment in the prior art generally has two structural modes. One is to install a small booster pump and a stacked pump in series at the water outlet of the water tank to solve the problem of boosting the water in the tank when the tap water has negative pressure. Finally, to meet the flow requirements of the stack pump, the head of the stack pump can be reduced by subtracting the tap water pressure to reduce the power, but the disadvantages of this method are high manufacturing cost, high installation strength, difficult control method, and large water pressure fluctuations

Another way is not to configure a booster pump. The power of the stacked pump is increased according to the full head configuration. When the tap water generates negative pressure, the stacked pump is switched to the water tank to absorb water. This way can reduce the configuration of the booster pump, but the pump runs In two working conditions (water inlet with pressure and no pressure), the energy saving effect of the pump is not as good as the first one when it is running

Images