Anti-frequent starting water pump

Abstract

The invention relates to a frequent-starting prevention water pump which comprises a pump shell. The pump shell is provided with a water inlet channel and a water outlet channel, and an impeller driven to rotate by a motor is arranged in the pump shell. The frequent-starting prevention water pump is characterized in that a pressure switch used for controlling the motor to be started or not started by sensing the change of the water pressure in the pump shell is further arranged in the pump shell; a valve structure capable of sensing flowing of water flow in the water inlet channel or the water outlet channel to control the motor to be started or stopped is arranged in the water inlet channel or the water outlet channel, the valve structure comprises a piston seat with a piston cavity, and a piston located in the piston cavity, a switch used for controlling the motor to be started or not started is arranged on the piston seat, the piston can slide along the piston cavity under the action of flowing of the water flow in the water inlet channel or the water outlet channel, and the switch can be opened or closed through the sliding of the piston in the piston cavity. Water flows out of the water outlet channel as long as the water pump works normally, and the piston can trigger the switch all the time to make the motor in the working state all the time so that the problem of frequent starting of the motor can be thoroughly solved, and the motor is effectively protected.

Description

technical field [0001] The invention relates to a water pump for water supply, in particular to a water pump for preventing frequent starting. Background technique [0002] A water pump is a device that conveys water flow through the rotation of a motor, and an automatic water pump refers to a water pump whose water flow is automatically controlled. In order to realize the automatic control of the water pump, a pressure switch is generally installed at the water outlet of the pump body. It cooperates with the check valve (one-way valve) installed at the water inlet pipe to achieve the effect of automatic shutdown. The pressure switch is It is used to sense the hydraulic pressure in the outlet pipe. When the hydraulic pressure in the outlet pipe is higher than the set value, the power supply of the pump motor is cut off, and the motor stops rotating. When the hydraulic pressure in the pipeline is lower than the set value, the power supply of the motor is turned on. For examp...

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Problems solved by technology

In the existing water pumps, there are mainly the following ways to solve the frequent start-up, which is to install an air tank on the pump body to buffer the pressure change and supplement the water flow. The action of the air tank on the pressure switch can prolong the interval between pump start-ups. To achieve a certain purpose of preventing frequent starts, but after the liquid in the pump body is released, due to the release of the pressure of the air tank, there will still be situations such as short water pipes, use of hoses, and small water flows, which will cause frequent starts of the pump, affecting Motor life and water pressure instability

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