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Externally-mixing type self-sucking pump with self-closing backflow hole

A return hole, self-closing technology, applied in non-variable-capacity pumps, components of pumping devices for elastic fluids, pumps, etc., can solve problems such as lowering the efficiency of self-priming pumps

Inactive Publication Date: 2017-03-15
江苏芬奇工业设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of reduced efficiency of self-priming pumps in the prior art, the present invention provides an externally mixed return hole self-closing self-priming pump with a simple structure and can effectively improve pump efficiency

Method used

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  • Externally-mixing type self-sucking pump with self-closing backflow hole

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Embodiment Construction

[0011] Further description will be made below in conjunction with drawings and embodiments.

[0012] figure 1 As shown: a self-closing self-priming pump with an external mixing return hole includes a pump body 1, an elevated water inlet elbow 2, an inlet check valve 3, and an impeller 8. The impeller 8 is set in the volute 7, and the pump body 1 The lower part of the inner cavity is the backwater chamber 5, and the upper part is the gas-liquid separation chamber 4. The wall thickness of the backwater chamber 5 is provided with a backflow hole 9 connected to the volute 7. The backflow hole 9 is connected with a backwater pipe 10, and the backwater skin is normally open. The door 11 is set at the outer nozzle of the return pipe. The outer nozzle of the return pipe is a downward slope. The normally open return water door is vertically set corresponding to the nozzle of the return pipe by its own weight. The return chamber is provided with a visible return chamber cover. 6.

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PUM

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Abstract

The invention relates to an externally-mixing type self-sucking pump with a self-closing backflow hole. The self-sucking pump comprises a pump body, an elevated water inlet bent pipe, an inlet check valve and a vane wheel. The vane wheel is arranged in a worm chamber. A water returning chamber is formed in the lower portion of a cavity of the pump body, and a gas-liquid separation chamber is formed in the upper portion of the cavity of the pump body. The backflow hole communicating with the worm chamber is formed in the wall of the water returning chamber and provided with a leather normally-opened water returning door.

Description

technical field [0001] The invention relates to a self-priming pump, in particular to an external mixing self-closing self-priming pump with return holes. Background technique [0002] The design of the return hole of the traditional self-priming pump is not closed. After the pump is running normally, the pressure at the pump return hole is the same as the pump outlet pressure and is greater than the pressure in the volute. Therefore, under normal circumstances, the leakage of the return hole determines the pump. The efficiency level. In general, in order to ensure timely gas-liquid separation and shorten the self-priming time, the size of the return hole is generally designed to be relatively large, and part of the return hole flows back to the edge of the impeller during operation, forming a vertical impact and causing a decline in pump performance. These are external mixing self-priming pumps. One of the main reasons for the low pump efficiency of the suction pump. Con...

Claims

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Application Information

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IPC IPC(8): F04D9/02F04D29/44
CPCF04D9/02F04D29/445
Inventor 盛绛肖爱华于伟戴旭凯朱平
Owner 江苏芬奇工业设备制造有限公司