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Method of controlling several pumps and pump corresponding to said method

A technology for control devices and pump pools, applied in pump control, non-variable pumps, machines/engines, etc., can solve the problems of increasing control and adjustment costs

Inactive Publication Date: 2004-05-05
GRUNDFOS NONOX AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, in order to set a certain number of pumps to operate alternately, it is necessary to increase the cost of control and adjustment at the first start-up.
And even if its switching threshold is reached, the pump that is not going to operate next will not be switched on, so that it will cause some problems when one of the next pumps to run fails during operation

Method used

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  • Method of controlling several pumps and pump corresponding to said method
  • Method of controlling several pumps and pump corresponding to said method
  • Method of controlling several pumps and pump corresponding to said method

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Embodiment Construction

[0026] The figure shown shows the progression of the liquid level N in the pump sump and the threshold value of the pump used over time t. The lower solid line 2 represents the liquid level in the pump sump as a function of time t. The solid line 4, the dotted line 6 and the dotted line 8 respectively represent the liquid level threshold when each pump is activated. In this basic case, each pump has three level thresholds S 1 , S 2 , and S 3 . At the same time, the liquid level threshold S 2 The correspondence represents an initial threshold at which the pump is in a base or delivered state and when this initial threshold is reached the pump is activated by the level sensor. The liquid level threshold S 1 is the threshold to reach when stopping the pump. Liquid level threshold S 3 Represents the second activation threshold, when reached, each pump can be activated in any situation, independently of other controllers. Therefore, S 3 is the emergency activation thresho...

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Abstract

The invention relates to a method for controlling several pumps in a pump sump, with which each pump comprises a switch which switches on the pump and each pump after its running is first blocked and depending on the running of the further pumps in the pump sump is released again. The invention further relates to a pump for carrying out this method.

Description

technical field [0001] The invention relates to a method for controlling a plurality of pumps and a pump designed for the method. Background technique [0002] Various known pumps, especially submersible pumps used in pump sumps, can pump fluid accumulated in a pump sump having a predetermined liquid level. Multiple pumps are usually used for such pumped basins. When using multiple pumps, it must be ensured that the pumps run evenly under load so that the wear of the pumps is uniform. To alternately start the individual pumps requires a central control that alternately starts and stops the pumps. This centrally controlled arrangement makes the assembly and operation of these pumps more difficult. [0003] From the German patent DE199 27 365 C2, it is known a kind of control of multiple pumps in a shared pump pool. According to this control, if a certain pump has not been turned during the alternate operation of multiple pumps, even if the designated switch is reached thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D15/02
CPCF04D15/029
Inventor 彼得·容克拉斯·尼博拉塞·伊尔韦斯海基·于利·科尔佩拉
Owner GRUNDFOS NONOX AS