Vertical multi-stage centrifugal pump and constant-pressure water supply unit

Abstract

The invention relates to a vertical multi-stage centrifugal pump which comprises a pump body, a motor, a cable and a base. The pump body and the motor are arranged on the base, the centrifugal pump further comprises a pump bowl, and the interior of the pump bowl is divided into an upper cavity and a lower cavity, wherein the upper cavity and the lower cavity are arranged up and down and communicated with each other. The pump body is arranged in the upper cavity, the motor is arranged in the lower cavity in a sealed mode, a water inlet is horizontally formed in the lower end of the lower cavity in the radial direction, the water outlet is communicated with the upper cavity through a fastening bolt, and the water outlet can be located in the lower end of the upper cavity in multiple horizontal directions. The centrifugal pump can avoid leakage caused by mechanical seal abrasion, water flowing in the centrifugal pump can cool the motor, the direction of the water outlet can be adjusted, and installation is convenient and quick. The invention further relates to a constant-pressure water supply unit which comprises a frequency converter and the vertical multi-stage centrifugal pump, the frequency converter is connected with the vertical multi-stage centrifugal pump in a sealed mode, and water flowing in the centrifugal pump can also cool the frequency converter.

Description

technical field [0001] The invention belongs to a centrifugal pump, in particular to a vertical multistage centrifugal pump powered by a water-cooled motor or a shielded motor and the pump body has no mechanical seal. The invention also relates to a constant-pressure water supply unit. Background technique [0002] As a new type of water supply equipment, constant pressure water supply units are mostly used in newly built, expanded and renovated residential buildings, residential quarters, office buildings and other places. In order to save space and land, their storage locations are mostly placed in underground pump rooms. Once a water run accident occurs, the unit will be damaged if it is submerged and soaked in water, causing the entire water supply system to be paralyzed, thereby affecting people's normal domestic water use. [0003] Vertical multistage centrifugal pump is the main tool for various operations such as water supply, industrial pressurization, industrial li...

AI Technical Summary

Problems solved by technology

[0002] As a new type of water supply equipment, constant pressure water supply units are mostly used in newly built, expanded and renovated residential buildings, residential quarters, office buildings and other places. In order to save space and land, their storage locations are mostly placed in underground pump rooms. Once a water accident occurs, the unit will be damaged if it is submerged and soaked in water, causing the entire water supply system to be paralyzed, thereby affecting people's normal living water

[0003] Vertical multistage centrifugal pump is the main tool for various operations such as water supply, industrial pressurization, industrial liquid transportation, water treatment, irrigation, etc., because of its own structure and the key components of the pump motor cannot be in contact with water. The manufacture and use of the

When encountering problems such as flooding, mechanical seal damage, and water running out of the pump room, it is easy to cause water to enter the motor or be damp to cause damage to the motor equipment, and the water inlet and outlet of the vertical multistage centrifugal pump are usually in a straight line, which affects the construction space. There are certain restrictions, while the efficiency of the installation operation is low

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