Constant-pressure water supply device

Abstract

The invention provides a constant-pressure water supply device and aims to overcome the defects that when instant large-flow water use occurs at a water use terminal in a system with long or thin pipelines, water pressure signals fed back to a controller is evidently delayed, pressure fluctuation is generated, frequent on and off of a water-supply water pump in a short time occurs and the problems cannot be solved by a capsule type air pressure tank of a conventional water supply system. According to the technical scheme, a cavity with pressure stabilizing and water storing functions is designed, the cavity is communicated with a water supply pipe network and the water use terminal through a water inlet and a water outlet respectively, a check valve is arranged between the water inlet and the water supply pipe network, and the water in the pressure-stabilizing cavity can keep constant pressure through a counterweight structure. When the instant water use occurs at the water use terminal, stable-pressure water supply can be achieved by the cavity while severe fluctuation of the pressure at the water inlet end can be avoided by the cavity, and the pressure fluctuation of the water supply pipe network is eliminated.

Description

technical field [0001] The invention relates to a domestic water supply device, in particular to a device capable of maintaining constant pressure water supply under instantaneous large flow conditions. Background technique [0002] The current secondary domestic water supply is generally variable frequency and constant pressure water supply. By detecting the pressure change in the pipeline system to adjust the operating frequency of the water pump to achieve the function of constant water pressure. However, in the actual use process, there are still many defects in this type of system, especially in systems with long or thin pipelines, the water pump stabilizes the water supply pressure by turning on or increasing the frequency. For flow water, there will be an obvious delay in the feedback of the water pressure signal to the controller, which will cause the phenomenon that the initial pressure is sufficient when the instantaneous large flow of water is used, but the pressu...

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Problems solved by technology

However, in actual use, there are still many defects in this type of system, especially in systems with long or thin pipelines. The water pump stabilizes the water supply pressure by turning on or increasing the frequency. For flow water, there will be an obvious delay in the feedback of the water pressure signal to the controller, which will cause the phenomenon that the initial pressure is sufficient when the instantaneous large flow water is used, but the pressure is insufficient after a short time. Hysteresis brings about pressure fluctuations, especially when water is used at the end of a thinner pipe, such as the direct-connected flush valve of a common commercial building toilet. Stop state switching frequently

In similar water supply systems, in order to solve this problem, some places mostly use capsule-type air pressure tanks to adjust the pressure of the pipe network, and try to avoid pressure fluctuations caused by instantaneous water use and frequent start and stop of water pumps. It is not ideal, due to the limitation of the installation location, it is impossible to take into account all the water points. In addition, the air pressure tank itself has limited water adjustment, and the actual adjustment effect is average.

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