Diaphragm booster pump with constant-pressure structure

Abstract

The invention relates to a diaphragm booster pump with a constant-pressure structure. The diaphragm booster pump comprises a pump head body which is internally provided with a high-pressure cavity and a low-pressure cavity; the high-pressure cavity and the low-pressure cavity are respectively connected with a water outlet and a source water inlet; a pressure-limiting assembly is arranged on a channel through which the source water inlet is communicated with the low-pressure cavity, the water inlet end of the pressure-limiting assembly is communicated with the source water inlet, and the water outlet end the pressure of which is limited by the pressure-limiting assembly is communicated with the low-pressure cavity; and a pressure-release assembly is arranged between the water outlet of the booster pump and the channel of the high-pressure cavity by a water-break pressure sensing diaphragm. In the invention, the pressure-limiting assembly is functionally combined with the pressure-release assembly to stabilize the output water pressure of the booster pump within a preset water pressure range, avoid the adverse effects of abnormal water pressure on pumping equipment, and reduce pressure-bearing potential safety hazards.

Description

technical field [0001] The invention relates to a diaphragm booster pump with a constant pressure structure. Background technique [0002] Diaphragm booster pump is an important component of reverse osmosis water purification system, and the control of its output water pressure has become a difficult point of concern in the industry. The current diaphragm booster pump used in the reverse osmosis water purification system mainly has the following influencing factors: 1. Fluctuation of source water pressure: In the reverse osmosis water purification system, the output water pressure of the booster pump is based on the reverse osmosis membrane and wastewater after the pump. Based on the flow parameters of the proportioner, it is set at 70PSI water pressure, and the flow rate is 500ML / MIN (50 gallon / day reverse osmosis equipment). Therefore, different source water pressures correspond to different output water pressures, which is basically a positive correlation function Theref...

AI Technical Summary

Problems solved by technology

The current diaphragm booster pump used in the reverse osmosis water purification system mainly has the following influencing factors: 1. Fluctuation of source water pressure: In the reverse osmosis water purification system, the output water pressure of the booster pump is based on the reverse osmosis membrane and wastewater after the pump. Based on the flow parameters of the proportioner, it is set at 70PSI water pressure, and the flow rate is 500ML / MIN (50 gallon / day reverse osmosis equipment). Therefore, different source water pressures correspond to different output water pressures, which is basically a positive correlation function relationship; therefore, the control of source water pressure is one of the technical options, the purpose of which is to reduce the influent flow, thereby reducing the output pressure of the booster pump; In the process of operation, dirt will be blocked, so the flow after the booster pump will decrease, and correspondingly, the output water pressure will increase (under the same source water pressure); the technical solution is that when the output water pressure increases, The flow rate of the source water decreases accordingly; therefore, the pressure-sensitive closure technology becomes the required option; the two situations of 3, 1, and 2 are superimposed, so that the water pressure behind the booster pump will increase rapidly, often causing safety failures of its equipment

The countermeasure is still to reduce the flow rate of the source water when the output water pressure reaches the set value, so as to realize the limitation of the output water pressure.

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