Negative-pressure pipette

Abstract

The invention discloses a negative-pressure pipette. The negative-pressure pipette comprises a pipe body, wherein a water inlet pipe is arranged at one end of the pipe body, a water outlet pipe is arranged at the other end of the pipe body, and both the water inlet pipe and the water outlet pipe are fixedly connected with the pipe body; a water inlet cavity is formed in the water inlet pipe, and a water outlet cavity is formed in the water outlet pipe; an accelerating cavity is connected to the water inlet cavity, a liquid suction cavity is connected to the water outlet cavity, and the accelerating cavity is connected with the liquid suction cavity; a liquid suction port is formed in the pipe body and corresponds to the liquid suction cavity. The water inlet cavity of the water inlet pipe is used for water input, the accelerating cavity in the pipe body enables the speed of inflow water to be increased, and negative pressure is formed when water passes the liquid suction cavity in an accelerated mode; at the moment, liquid sucked by the liquid suction port is mixed with water in a cleaning liquid cavity and the water outlet cavity, and the mixed liquid flows out through the water outlet cavity of the water outlet pipe; in this way, cleaning liquid can be automatically sucked, then sufficient mixing is conducted in the liquid suction cavity and the water outlet cavity, and mixing effect is good.

Description

technical field [0001] The invention relates to the field of fluid mechanics, and more specifically, the invention relates to a negative pressure suction pipe. Background technique [0002] At present, the high-pressure cleaning machine mainly includes a high-pressure pump assembly, a motor and a water gun. Its working principle is to drive the high-pressure pump assembly to work through the motor, pressurize the water sucked from the water inlet, and then spray it out at high pressure from the water outlet. In the prior art, a liquid suction nozzle is provided on the side wall of the water outlet, but automatic suction of the cleaning solution cannot be realized under normal pressure. If you want to inhale the cleaning solution through the suction nozzle on the side wall of the water outlet, you can realize automatic suction of the cleaning solution by increasing the water output of the water gun, but if the water output is increased, the water pressure sprayed from the wat...

AI Technical Summary

Problems solved by technology

In the prior art, a liquid suction nozzle is provided on the side wall of the water outlet, but automatic suction of the cleaning solution cannot be realized under normal pressure

If you want to inhale the cleaning solution through the suction nozzle on the side wall of the water outlet, you can realize automatic suction of the cleaning solution by increasing the water output of the water gun, but if the water output is increased, the pressure of the water sprayed from the water gun is too low to Achieve high pressure cleaning effect

In addition, since the cleaning solution is not mixed with water first and then pressurized, but is mixed with water that has been pressurized first, the cleaning solution and water cannot be fully mixed.

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