Centrifugal pump water supply device

Abstract

The invention discloses a centrifugal pump water supply device. The centrifugal pump water supply device comprises an impeller shell, a water inlet pipe is arranged at the middle position of the impeller shell, a three-way valve is arranged above the impeller shell, the output end of the three-way valve is connected with a reflux pipe and a drainage pipe, the reflux pipe communicates with the water inlet pipe, a one-way valve is arranged in the water inlet pipe, the one-way valve is located at the front end of the reflux pipe, and a water supply barrel is arranged on one side of the impeller shell. The centrifugal pump water supply device is provided with the water supply barrel communicating with an impeller cavity, the water quantity in the water supply barrel is higher than the size ofthe impeller cavity to ensure the normal start of an impeller, when the impeller in the impeller cavity rotates, water can be dumped into the water supply barrel, and the next water supply can be guaranteed by using a float plate to storage water; and a contact switch is arranged in the water supply barrel, the drainage pipe is opened when water in the water supply barrel is greater than the amount to be supply next time, the function of automatic drainage is realized, and the sufficient water supply next time can further be ensured.

Description

technical field [0001] The invention relates to the technical field of water pumps, in particular to a centrifugal pump water supply device. Background technique [0002] The water inlet of the centrifugal pump must be filled with water. Once there is no water in the water inlet of the centrifugal pump, the mechanical seal of the centrifugal pump will be broken due to the heat generated by high-speed rotation, which will affect the normal operation of the entire water supply system. Now the common solution One is to install a water filling cup at the front end of the centrifugal pump, and fill the pipeline with water before starting each time. This method is time-consuming and labor-intensive, and is extremely inconvenient. Another method is to install the centrifugal pump at the lowest water level of the reservoir Below, this method has many disadvantages. Firstly, it is necessary to build an underground or semi-underground pumping station, which occupies a large area and r...

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Problems solved by technology

[0002] The water inlet of the centrifugal pump must be filled with water. Once there is no water in the water inlet of the centrifugal pump, the mechanical seal of the centrifugal pump will be broken due to the heat generated by high-speed rotation, which will affect the normal operation of the entire water supply system. Now the common solution One is to install a water filling cup at the front end of the centrifugal pump, and fill the pipeline with water before starting each time. This method is time-consuming and labor-intensive, and is extremely inconvenient. Another method is to install the centrifugal pump at the lowest water level of the reservoir Below, this method has many disadvantages. Firstly, it is necessary to build an underground or semi-underground pumping station, which occupies a large area and requires high civil construction costs. Secondly, the pumping station also needs to have moisture-proof and ventilation conditions. Therefore, a simple and reliable structure is required. Centrifugal pump water supply device

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