Tandem Diaphragm Pump with Check and Leakage Protection

Abstract

The invention discloses a serial diaphragm pump with check and leakage prevention functions, and relates to the technical field of diaphragm pumps. Wherein, the diaphragm pump includes a housing mechanism, a diaphragm mechanism, a drive mechanism and a non-return mechanism. Specifically, the housing mechanism includes a support assembly, a diaphragm seat, and an upper cover; a first cavity, a second cavity, and a third cavity are sandwiched between the upper cover and the diaphragm seat; the diaphragm seat is provided with a first passage, Second and third passages. The diaphragm mechanism includes a diaphragm, a first movable bag and a second movable bag connected in series; the diaphragm is provided with a first diaphragm and a second diaphragm, the first movable bag includes a first chamber, and the second movable bag is provided with a second diaphragm. In the cavity, the first channel and the second channel communicate with the first cavity respectively, and the third channel and the third cavity communicate with the second cavity respectively. The driving mechanism is used to drive the first movable bag and the second movable bag to alternately move up and down. The anti-return mechanism is used to prevent the external solution from flowing back into the second cavity.

Description

technical field [0001] The invention relates to the technical field of diaphragm pumps, in particular to a serial diaphragm pump with check and anti-leakage functions. Background technique [0002] Diaphragm liquid pumps provide circular motion by the motor, and then the diaphragm in the liquid pump is reciprocated by a mechanical device, thereby compressing and stretching the air in the pump cavity. There is a pressure difference between the water inlet and the external atmospheric pressure. Under the action of the pressure difference, water is pressed into the water inlet and then discharged from the water outlet. This diaphragm liquid pump has been well applied in occasions such as small household appliances and medical equipment. [0003] An existing diaphragm pump consisting of a motor, an eccentric wheel, a steel needle, a curved rod, a lower seat, a bell seat, a bell, a middle plate, an umbrella, a diaphragm, an upper cover, and a circlip; , drives the eccentric whe...

AI Technical Summary

Problems solved by technology

[0005] (1): The existing diaphragm pump itself does not have a check system, and a single check valve needs to be connected externally, which results in large volume, high cost and low assembly efficiency

[0006] (2): The existing diaphragm pump uses 2 umbrella valves and 1 diaphragm as the water inlet and outlet system. The umbrella valve is easy to stick, which may cause the opening pressure of the pump to be too high or the umbrella valve cannot be opened; and the umbrella valve The ability to pass foreign matter is poor. In the actual use process, foreign matter particles of various sizes will be mixed in the water. When the water pump passes through the water, the umbrella valve is easy to absorb particles, causing the inlet and outlet to be blocked, so that the diaphragm pump cannot work.

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