Parasitical auxiliary self-priming vacuum pump

Abstract

The invention discloses a parasitical auxiliary self-priming vacuum pump which comprises a flow passage component and a power component. A sealed chamber of the flow passage component is composed of aneck seal, an upper cover, a lower cover, an outlet check pad and an inlet check pad. A diaphragm is arranged in the sealed chamber, and a diaphragm check pad is arranged in the middle of the upper surface of the diaphragm. A diaphragm shaft sequentially penetrates the diaphragm check pad, the diaphragm and the neck seal from top to bottom, and the lower end of the diaphragm shaft stretches intoa crankshaft box of the power component and is fixedly connected with a crankshaft. The crankshaft in the crankshaft box drives a diaphragm sheet to continuously and vertically move through the diaphragm shaft, the diaphragm sheet and the three check pads cooperate, and air is extracted to a lower chamber of a sealed cavity from a pump cavity of a water pump, then pressed to an upper chamber to move in one way and finally exhausted to the atmosphere to assist in self priming of the water pump. According to the vacuum pump, the secondary self-priming work efficiency of a dry mounted centrifugalpump can be improved, and production and rescue losses caused by long-time preparation of a primer pump can be reduced; and meanwhile potential safety hazards of manpower can be avoided, and the labor intensity can be reduced.

Description

technical field

[0001] The invention relates to the technical field of general machinery, in particular to a parasitic auxiliary self-priming vacuum pump, which is matched with various types of dry-installed centrifugal pump equipment. Background technique

[0002] In the field of general-purpose pumps, general non-submersible centrifugal pumps, except self-priming pumps with their own self-priming function and ordinary centrifugal pumps relying on positive pressure water intake, most dry-installed centrifugal pumps need to be configured Bottom valve, before starting for the first time, the pump needs to be filled with water to start. Although the pump is equipped with a bottom valve, the bottom valve has natural defects, which are mainly manifested in: 1. The bottom valve is heavy and installed under the liquid, which is not easy to install, monitor, maintain and repair; 2. The bottom valve is immersed in water for a long time. In the liquid, it is easy to cause corrosion,...

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