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Large-flow self-suction centrifugal pump

A technology of self-priming pumps and centrifugal pumps, applied in the field of large-flow self-priming centrifugal pumps, can solve the problems of low pump efficiency and slow water supply speed, and achieve the effects of increasing water supply speed, reducing volume, and improving water pump efficiency

Inactive Publication Date: 2006-08-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing large-flow self-priming pumps, such as slow water supply speed and low pump efficiency, the present invention provides a special-shaped nozzle self-priming pump. The self-priming pump not only has a spraying device, but also has a non-circular cross-sectional shape of the nozzle. Other shapes, so that the special-shaped nozzle with the same flow area has a longer circumference than the circular nozzle, so as to improve the water supply speed of the large-flow self-priming pump

Method used

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  • Large-flow self-suction centrifugal pump

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Embodiment Construction

[0024] In Fig. 1, impeller shaft (1), impeller (2), shaft seal (3), special-shaped nozzle (5), S-shaped elbow (9), water pump outlet diffuser pipe (11), water pump outlet diffuser pipe The large channel (10) between the inlet to the nozzle forms the main part of this embodiment together with the self-priming pump housing (6), and the spring (7) and valve plate (8) are used to close the inlet of the special-shaped nozzle (5), The water pump efficiency of present embodiment can be improved, and the irrigation hole plug (14) is to open the irrigation hole before starting, and the working machine (electric motor or internal combustion engine, etc.) The embodiment is connected into one body, the water inlet pipeline (12) is connected to the upper end of the S-shaped elbow (9), and the water outlet pipeline (13) is connected to the top of the outlet diffuser pipe (11) of the water pump.

[0025] figure 2 It is the A--A sectional view of Fig. 1, image 3 It is the B--B sectional vi...

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Abstract

Present invention refers to high flow rate self-priming centrifugal pump. It contains S-bend duct, feed water piping connected with upper end of S-bend duct, impeller, non - circus abnormal shape nuzzle whose outlet pointing to impeller inlet, major path between water pump water pump outlet diverging duct to nuzzle. Valve plate with spring can be set at inlet of abnormal shape nuzzle. Said invention can reduce self-priming pump volume and raise water pumping speed, and pump efficiency (installing valve at nozzle inlet), or raise suction lift and lift (not installing valve at nozzle inlet).

Description

Technical field [0001] The present invention is a large-flow self-priming centrifugal pump, referred to as self-priming pump, which belongs to the general mechanical product - pump category, especially can rely on a small amount of water stored in the pump, use the centrifugal impeller to pump out the air in the water inlet pipeline, and use atmospheric pressure to pump out the water. A self-priming pump that is drawn up from the water in the inlet pool below the pump inlet. Background technique [0002] At present, the known self-priming pumps are divided into internal mixing type and external mixing type, and the internal mixing type is divided into two types: injection device and no injection device. The internal mixing type self-priming pump with injection device has fast water supply, The advantage of high suction lift has been widely used in small self-priming pumps. This injection device is actually a jet pump, which is mainly composed of nozzles, mixing chambers and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D9/06
Inventor 陆伟刚刘建瑞施卫东
Owner JIANGSU UNIV
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