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Drainage pump cover

A technology of drainage pump and pump cover, applied in the direction of pump, pump element, non-variable-capacity pump, etc., can solve the problem of large flow loss, achieve the effect of high lift, small flow loss, avoid flow loss, and improve efficiency

Active Publication Date: 2014-07-23
HANYU GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a pump cover of a drainage pump to solve the technical problem of excessive flow loss caused by reducing continuous backflow and eliminating noise in the prior art

Method used

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  • Drainage pump cover
  • Drainage pump cover
  • Drainage pump cover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 as figure 1 and figure 2 As shown, a pump cover of a drainage pump, the pump cover includes a cylindrical side wall 6 connected to each other and a water inlet end face 5, the water inlet end face 5 is provided with a water inlet 1, the water inlet 1 is connected to the water inlet pipe 3, and the side wall 6 is provided with There is a water outlet 9, and an oblique groove 2 is formed on the water inlet end surface 5. The water inlet end surface 5 is a plane, and the depth of the oblique groove 2 gradually deepens from the side wall 6 to the water inlet 1 direction. Since the end face 5 of the water inlet is still kept as a plane, and only inclined grooves are opened on the end face, the loss of drainage flow is reduced. By setting the inclined groove 2, the gas can be discharged from the water inlet 1 through the inclined groove 2, reducing the noise of a certain frequency of "boom-boom-boom" caused by the continuous circulation of water discharge and back...

Embodiment 2

[0029] Example 2 as image 3 and Figure 4 As shown, the horizontal cross-sectional view of the oblique groove 2 is wedge-shaped.

Embodiment 3

[0030] Example 3 as Figure 5 ~ Figure 7 As shown, the oblique groove 2 is arranged on the end surface 5 of the water inlet, close to the side wall 6 opposite to the water outlet 9, so as to be far away from the water outlet, and the horizontal section of the oblique groove 2 is triangular. The air in the pump cover can be drained away through the drain port 9, so setting the inclined groove near the drain port 9 will cause flow loss, while setting it at a position far away from the drain port 9 can not only reduce the flow loss, but also achieve Eliminates the effect of continuous backflow and exhaust noise. In Embodiment 3, two oblique grooves 2 are used.

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Abstract

The invention relates to the field of centrifugal drainage pumps, in particular to a drainage pump cover. The pump cover comprises a cylindrical side wall and a water inlet end face which are mutually connected; a water inlet is formed on the water inlet end face, and is connected with a water inlet pipe; a water outlet is formed on the side wall, and is communicated with the water outlet; a groove is formed on the water inlet end face; and the groove is gradually deepened from the side wall to the water inlet direction. The groove is inclined to the water inlet; the gas can be exhausted from the water inlet through the groove; and continuous backflow in a certain frequency and noise emission due to upper drainage of water and continuous cycle of the backflow are avoided. The water inlet end face is modified into a plane. Therefore, the loss of flow is reduced and the drainage pump cover has the advantages of high lift and low loss of flow.

Description

technical field [0001] The invention relates to the field of centrifugal drainage pumps, in particular to a pump cover of the drainage pump. Background technique [0002] When the existing centrifugal drainage pump is in use, when the water inlet of the pump sucks air, the liquid in the discharge pipe will continuously flow back and be discharged after the air enters, and the air will accumulate in the pump body and cannot be discharged, resulting in "boom- Boom-boom" continuous backflow and exhaust noise. In order to reduce this abnormal sound, the existing technology, such as the patent No. 200610097517.2, changes the end face of the inner wall of the pump cover from a plane to a conical end face, and at the same time opens evenly arranged grooves on the conical end face of the inner wall of the pump cover. , to reduce the noise of a certain frequency of "boom-boom-boom" due to the continuous circulation of water discharge and backflow. However, this structure in the pri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/42F04D29/66
Inventor 黄访新池文茂
Owner HANYU GRP CO LTD