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CN-122014637-A - Energy-saving pump set and linkage control method for multiple energy-saving pumps

CN122014637ACN 122014637 ACN122014637 ACN 122014637ACN-122014637-A

Abstract

The invention relates to an energy-saving pump set and a linkage control method for a plurality of energy-saving pumps, which relate to the technical field of energy-saving pumps and comprise a plurality of energy-saving pumps for conveying media, a motor arranged on the energy-saving pumps for driving the energy-saving pumps to work, a communication pipeline fixedly connected with the energy-saving pumps for respectively conveying the media in each energy-saving pump, a conveying pipeline fixedly connected with the communication pipeline for connecting each energy-saving pump in parallel, and a valve arranged on the communication pipeline for controlling the opening and closing of the communication pipeline. The invention has the effect of preventing the energy-saving pump from running under low load for a long time.

Inventors

  • LI LONG
  • DUAN MIN
  • PANG YINKU

Assignees

  • 杭州沃德水泵制造有限公司

Dates

Publication Date
20260512
Application Date
20260330

Claims (10)

  1. 1. The utility model provides an energy-conserving pump package, its characterized in that includes a plurality of energy-conserving pumps (1) that are used for carrying the medium, set up motor (2) in order to drive energy-conserving pump (1) work on energy-conserving pump (1), with energy-conserving pump (1) fixed connection in order to carry communicating pipe (3) of medium in each energy-conserving pump (1) respectively, with communicating pipe (3) fixed connection in order to connect each energy-conserving pump (1) parallelly connected pipeline (4) and set up valve (5) in order to control communicating pipe (3) and open and close on communicating pipe (3).
  2. 2. A multiple energy-saving pump linkage control method applied to the energy-saving pump set in claim 1, comprising the following steps: step S1, obtaining required power; Step S2, based on preset energy-saving pump numbers, carrying out any number of combinations on the energy-saving pumps (1) to obtain a working number group and corresponding working group power; Step S3, screening out a work number group with the power greater than or equal to the required power, and defining the work number group as an expected work number group; s4, searching rated power based on the expected work number group; Step S5, calculating based on the required power and the preset rated power corresponding to each energy-saving pump (1) in the predicted working number group to obtain the working efficiency corresponding to each energy-saving pump (1) in the predicted working number group; Step S6, when each working efficiency falls into a reasonable load range, defining a corresponding predicted working number group as an actual working number group; And S7, controlling the energy-saving pumps (1) corresponding to the actual working number groups to work according to the respective working efficiencies.
  3. 3. The method for controlling the linkage of a plurality of energy-saving pumps according to claim 2, further comprising a further determination method of an actual working number group, the method comprising: Step S60, obtaining a fluctuation curve of the required power; Step S61, obtaining maximum demand power and minimum demand power based on fluctuation curve analysis; step S62, when the power of the working group corresponding to the actual working number group is smaller than the maximum required power, obtaining additional required power based on the power of the working group corresponding to the actual working number group and the maximum required power; step 63, searching the energy-saving pump number corresponding to rated power based on the extra required power, and forming a new actual working number group by the energy-saving pump number and the actual working number group; step S64, determining fluctuation power of a single energy-saving pump (1) based on the maximum required power, the minimum required power and the new actual working number group; Step S65, calculating fluctuation work efficiency based on the fluctuation power and the corresponding rated power; and step 66, defining a corresponding new actual work number group as an actual work number group when the fluctuation work efficiency falls into a reasonable load range.
  4. 4. The method for controlling a plurality of energy-saving pumps in a linked manner according to claim 3, further comprising: step S67, when the fluctuation working efficiency does not fall into a reasonable load range, obtaining a difference power based on the maximum required power and the minimum required power; step S68, obtaining the number of the energy-saving pumps based on the new actual working number group; step S69, obtaining average power based on the difference power and the number of the energy-saving pumps; step S70, calculating based on the average power and preset rated power corresponding to each energy-saving pump (1) in the new actual working number group to obtain new working efficiency corresponding to each energy-saving pump (1) in the new actual working number group; And step S71, defining a corresponding new actual work number group as an actual work number group when each new work efficiency falls into a reasonable load range.
  5. 5. The method for controlling a plurality of energy-saving pumps in a linked manner according to claim 3, further comprising an optimization method for selecting a fluctuation work efficiency, the method comprising: Step S660, when a plurality of fluctuation work efficiencies fall into a reasonable load range, sequencing all the fluctuation work efficiencies falling into the reasonable load range according to the work efficiency so as to find out the maximum fluctuation work efficiency; And step S661, controlling the energy-saving pump number corresponding to the maximum fluctuation working efficiency to work according to the maximum fluctuation working efficiency.
  6. 6. The method for controlling a plurality of energy-saving pumps in a linked manner according to claim 2, further comprising: S8, obtaining actual flow; step S9, searching the required flow based on the required power; Step S10, obtaining a flow difference value based on the required flow and the actual flow; and S11, outputting an alarm signal when the flow difference value does not fall into a reasonable error range.
  7. 7. The method for controlling a plurality of energy-saving pumps in a coordinated manner according to claim 6, wherein the checking method when the flow difference value does not fall within a reasonable error range comprises: step S12, arbitrarily selecting one energy-saving pump number in the actual working number group, defining the energy-saving pump number as a verification energy-saving pump number, and defining the working efficiency corresponding to the verification energy-saving pump number as a verification working efficiency; step S13, searching corresponding check energy-saving pump numbers based on the check working efficiency; step S14, replacing the energy-saving pump (1) corresponding to the check energy-saving pump number with the check energy-saving pump number and obtaining the check flow; step S15, when the check flow rate is inconsistent with the required flow rate, selecting the next check energy-saving pump number and continuing to carry out the steps S12 to S14; And S16, when the check flow is consistent with the required flow, outputting an alarm signal and simultaneously outputting the check energy-saving pump number.
  8. 8. The method for controlling a plurality of energy-saving pumps in a linked manner according to claim 7, further comprising: step S17, when the check energy-saving pump does not exist, determining a residual number group based on the actual working number group; Step S18, combining the energy-saving pump numbers in the residual number groups based on the checking work efficiency to obtain a checking energy-saving pump number group meeting the checking work efficiency; Step S19, replacing the energy-saving pump (1) corresponding to the check energy-saving pump number with the check energy-saving pump number group and obtaining the flow of the check group; step S20, when the check group flow rate is inconsistent with the demand flow rate, selecting the next check energy-saving pump number and continuing to carry out the steps S18 to S19; and S21, when the check group flow is consistent with the demand flow, outputting an alarm signal and simultaneously outputting a check energy-saving pump number.
  9. 9. The method for controlling a plurality of energy-saving pumps in a linked manner according to claim 8, further comprising: Step S22, when the check energy-saving pump number group does not exist, defining the check energy-saving pump number corresponding to the check group flow rate inconsistent with the required flow rate as a normal energy-saving pump number; step S23, obtaining combined checking work efficiency based on the checking work efficiency and the normal work efficiency corresponding to the normal energy-saving pump number; Step S24, searching the corresponding combination check energy-saving pump number based on the combination check working efficiency; step S25, replacing the energy-saving pump (1) corresponding to the check energy-saving pump number with the energy-saving pump (1) corresponding to the normal energy-saving pump number by the combination check energy-saving pump number and obtaining the combination check flow; Step S26, when the combined check flow is inconsistent with the required flow, selecting the next check energy-saving pump number and continuing to carry out the steps S23 to S25; And step S27, when the combined check flow is consistent with the required flow, outputting an alarm signal and simultaneously outputting a check energy-saving pump number.
  10. 10. The method for controlling a plurality of energy-saving pumps in a linked manner according to claim 9, further comprising: Step S28, when the combination check energy-saving pump number does not exist, searching a large check energy-saving pump number with rated power larger than power corresponding to the check working efficiency; Step S29, obtaining the large-amount check working efficiency based on the check working efficiency and the rated power corresponding to the large-amount energy-saving pump number; Step S30, when the large-scale check working efficiency falls into a reasonable load range, replacing the energy-saving pump (1) corresponding to the check energy-saving pump number with the large-scale check energy-saving pump number, controlling the energy-saving pump (1) corresponding to the large-scale check energy-saving pump number to work according to the large-scale check working efficiency and obtaining large-scale check flow; Step S31, when the large check flow is inconsistent with the required flow, selecting the next check energy-saving pump number and continuing to carry out the steps S28 to S30; and S32, outputting an alarm signal and a check energy-saving pump number when the large check flow is consistent with the required flow.

Description

Energy-saving pump set and linkage control method for multiple energy-saving pumps Technical Field The invention relates to the technical field of energy-saving pumps, in particular to an energy-saving pump set and a linkage control method for a plurality of energy-saving pumps. Background The energy-saving pump is a core universal machine for converting mechanical energy into fluid kinetic energy and pressure energy, and is widely applied to the key fields of national economy such as urban water supply, building heating and ventilation, industrial production, agricultural irrigation and energy chemical industry. In the related art, in order to meet the peak demands of the system, a single high-power energy-saving pump is generally adopted as a power unit, and in order to improve the operation efficiency of the system, the industry generally adopts a variable-frequency speed regulation technology, and the flow change is adapted by regulating the rotation speed of the pump so as to replace the traditional valve throttling regulation mode. For the related technology, in the actual working process of the energy-saving pump, a combined fixed parameter model is selected for adapting to the maximum working condition, and in the actual working process, the power requirement of most working time on the energy-saving pump is far lower than the maximum value, so that a single energy-saving pump runs under a low load for a long time, and the actual working efficiency of the energy-saving pump is drastically reduced. Disclosure of Invention In order to prevent the energy-saving pump from running under low load for a long time, the invention provides an energy-saving pump set and a linkage control method for a plurality of energy-saving pumps. In a first aspect, the present invention provides an energy-saving pump set, which adopts the following technical scheme: An energy-saving pump set comprises a plurality of energy-saving pumps for conveying media, a motor arranged on the energy-saving pumps for driving the energy-saving pumps to work, a communication pipeline fixedly connected with the energy-saving pumps for respectively conveying the media in each energy-saving pump, a conveying pipeline fixedly connected with the communication pipeline for connecting each energy-saving pump in parallel, and a valve arranged on the communication pipeline for controlling the opening and closing of the communication pipeline. Through adopting above-mentioned technical scheme, a plurality of energy-saving pumps form the parallel structure through communicating tube and pipeline, can start single or many energy-saving pumps in a flexible way according to the medium transport demand on the one hand, avoid the loss aggravation that single energy-saving pump long-term low-load operation leads to extension equipment whole life. In a second aspect, a method for controlling multiple energy-saving pumps in a linkage manner adopts the following technical scheme: A linkage control method for a plurality of energy-saving pumps comprises the following steps: step S1, obtaining required power; step S2, carrying out any number of combination on the energy-saving pumps based on preset energy-saving pump numbers to obtain a working number group and corresponding working group power; Step S3, screening out a work number group with the power greater than or equal to the required power, and defining the work number group as an expected work number group; s4, searching rated power based on the expected work number group; Step S5, calculating based on the required power and preset rated power corresponding to each energy-saving pump in the predicted working number group to obtain working efficiency corresponding to each energy-saving pump in the predicted working number group; Step S6, when each working efficiency falls into a reasonable load range, defining a corresponding predicted working number group as an actual working number group; and S7, controlling the energy-saving pumps corresponding to the actual working number groups to work according to the respective working efficiencies. Through adopting above-mentioned technical scheme, can make up the energy-saving pump in a flexible way according to actual demand power, ensure that every energy-saving pump all operates in reasonable load scope to effectively avoided the efficiency decline problem that single energy-saving pump long-time low-load operation leads to, not only improved the whole operating efficiency of energy-saving pump group, still showing the energy consumption that has reduced, reached energy-saving and emission reduction's effect. Optionally, the method further comprises a method for determining the actual working number group, and the method comprises the following steps: Step S60, obtaining a fluctuation curve of the required power; Step S61, obtaining maximum demand power and minimum demand power based on fluctuation curve analysis; step S62, when the power of the working group