S-shaped downwards horizontal axis-extending tubular pump device

Abstract

The invention discloses an S-shaped downwards horizontal axis-extending tubular pump device, belonging to the technical field of water conservancy projects. The S-shaped downwards horizontal axis-extending tubular pump device comprises a water inlet segment, an axial flow pump or mixed-flow pump section, an elbow pipe, a water outlet segment and a power device which are connected in turn; the water inlet segment is a flatly shrunk water-inlet flowing channel with a gradually shrinking section, and the shape of the section of the water inlet segment gradually changes into a circular outlet from a rectangular inlet through an elliptical transitional segment; the shape of the overflowing cross-section of the elbow pipe gradually transits into an elliptical outlet from a circular inlet, and the overflowing cross-section of the elbow pipe enlarges gradually from the circular inlet to the elliptical outlet; the water outlet segment is a flatly enlarged water-outlet flowing channel with a gradually enlarging section, and the shape of the cross-section of the water outlet segment gradually changes into a rectangular outlet from an elliptical inlet through an elliptical transitional segment. The power device is horizontally arranged below the water-outlet flowing channel and is located on the same vertical surface with the water-inlet and the water-outlet flowing channels. Compared with the same type of tubular water pump device, the S-shaped downwards horizontal axis-extending tubular pump device has a small floor area, reduced engineering investment by 10-40%, and improved efficiency by 2-5%. The S-shaped downwards horizontal axis-extending tubular pump device is suitable for various kinds of axial flow pumps or guide-vane Francis pump stations, is safe and convenient to install and maintain and is low in operation cost.

Description

technical field [0001] The invention relates to a hydraulic engineering facility, in particular to the structure of a tubular pump device, and belongs to the technical field of hydraulic engineering. Background technique [0002] A large number of low-lift pumping stations have been built or are under construction in the national south-to-north water diversion project and in the plain areas along the river and lake. Tubular pump is the best pump type suitable for pumping stations with a lift of about 3m. There are several different forms of tubular pumps, such as bulb type, shaft type and shaft extension type. [0003] The bulb-type tubular pump has the advantages of small hydraulic loss and high operating efficiency, but its disadvantage is that the motor and transmission structure are all in the bulb body, the structure is complicated, and the installation and maintenance are very inconvenient. Due to the existence of the supporting parts, cable tubes and inlet pipes of ...

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