CN112196785B - High-pressure cleaning control method and system - Google Patents
High-pressure cleaning control method and system Download PDFInfo
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- CN112196785B CN112196785B CN202011049800.4A CN202011049800A CN112196785B CN 112196785 B CN112196785 B CN 112196785B CN 202011049800 A CN202011049800 A CN 202011049800A CN 112196785 B CN112196785 B CN 112196785B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a high-pressure cleaning control method and a high-pressure cleaning control system, which are used for acquiring system pressure in a high-pressure cleaning pipeline and the running state of a water pump in real time, and automatically adjusting the starting sequence and the starting number of the water pump based on the difference value between the acquired system pressure and a preset target pressure. The high-pressure cleaning control method and the control system thereof solve the problem of high energy loss when multiple pumps of the high-pressure cleaning device run simultaneously, utilize the PID algorithm to carry out automatic adjustment, reduce the opening amount of the water pump when relative low pressure is needed, and increase the opening amount of the water pump when relative high pressure is needed, thereby effectively carrying out automatic management on the water pump, prolonging the service life of the water pump, and reducing energy loss and equipment maintenance cost.
Description
Technical Field
The invention belongs to the field of livestock breeding equipment, and particularly relates to a high-pressure cleaning control method and system.
Background
The large-scale farm has high feeding density, and epidemic situations are difficult to control and often cause great loss once infectious diseases occur in the farm. The epidemic prevention work of having done plant, the key is in time to carry out thorough cleaning disinfection to aquaculture environment and handles, at present, high pressure cleaning equipment belongs to comparatively advanced cleaning equipment, but present high pressure cleaning equipment is the multi-pump loading simultaneously usually, in order to guarantee can provide required high-pressure state in real time in the use, but the energy loss when the multi-pump is moved simultaneously is higher, and to using this equipment washing to can greatly increase the cleaning cost under the condition that does not need high water pressure very much, the multi-pump is long-time operation simultaneously still leads to its life's reduction, increase the maintenance cost.
Accordingly, further developments and improvements are still needed in the art.
Disclosure of Invention
In order to solve the above problems, a high pressure cleaning control method and system are proposed. The invention provides the following technical scheme:
a high pressure purge control method, comprising: the method comprises the steps of acquiring system pressure in the high-pressure cleaning pipeline and the running state of the water pumps in real time, and automatically adjusting the starting sequence and the starting number of the water pumps based on the difference value between the acquired system pressure and a preset target pressure.
Further, before the system is started, the system pressure in the current high-pressure cleaning pipeline is obtained;
comparing the acquired system pressure with a preset low-pressure starting pressure, and starting the pump A when the system pressure is lower than the low-pressure starting pressure, wherein the low-pressure starting pressure is the minimum pressure requirement value of the water pressure of the pipeline;
the method comprises the steps of obtaining system pressure in a high-pressure cleaning pipeline after a pump A is started, comparing the system pressure with a preset target pressure, obtaining the current operation frequency of the pump A when the system pressure is smaller than the target pressure, judging whether the current operation frequency of the pump A is a rated working frequency or not, and starting a pump B if the current operation frequency of the pump A is the rated working frequency.
Further, when the system pressure is lower than the low-pressure starting pressure, the duration of the state that the system pressure is lower than the low-pressure starting pressure is obtained, the obtained duration is compared with the preset pressure maintaining delay time, and if the duration is larger than the preset pressure maintaining delay time, the pump A is started.
Further, when the system pressure is smaller than the target pressure and the current operating frequency of the pump A is the rated operating frequency, the system pressure difference is obtained through calculation by using the obtained system pressure and the target pressure, the calculated system pressure difference is compared with a preset multi-pump pressure difference, if the system pressure difference is larger than the multi-pump pressure difference, the pump B is started, and the multi-pump pressure difference is determined through fine adjustment up and down according to the pressure value increased by the system after the single variable frequency motor operates at the minimum safe operating frequency.
Further, if the system pressure difference is greater than the preset multi-pump pressure difference, the duration time that the system pressure difference is greater than the preset multi-pump pressure difference is obtained, and if the duration time is greater than the preset pump delay time, the pump B is started.
Further, when the system pressure is greater than the target pressure and the current operating frequency of the pump A is the minimum safe operating frequency of the motor, the system pressure difference is obtained through calculation by using the obtained system pressure and the target pressure, the calculated system pressure difference is compared with a preset pump withdrawing pressure difference, if the system pressure difference is greater than the pump withdrawing pressure difference, the pump A is closed, and the pump withdrawing pressure difference is determined according to the upper and lower fine adjustment of the pressure value, reduced by the system, of the single variable frequency motor after the variable frequency motor operates at the minimum safe operating frequency.
Further, if the system pressure difference is greater than the preset pump withdrawal pressure difference, the duration that the system pressure difference is greater than the preset pump withdrawal pressure difference is obtained, and if the duration is greater than the preset overflow pump withdrawal delay time, the pump A is closed.
Further, after the pump A is started, the operation of the pump A is adjusted by adopting a PID algorithm, and when the system pressure after the pump A is started is equal to a preset target pressure, the operation state of the pump A of the PID algorithm is maintained.
Further, when the system pressure is lower than the target pressure and the current operation frequency of the pump A is not the rated operation frequency, returning to continuously adjust the operation of the pump A through a PID algorithm; when the system pressure difference is smaller than the preset multi-pump adding pressure difference or the duration time of the system pressure difference larger than the preset multi-pump adding pressure difference is not larger than the preset adding pump delay time, returning to continuously adjust the operation of the pump A through a PID algorithm; when the system pressure is greater than the target pressure and the current operation frequency of the pump A is not the minimum safe operation frequency of the motor, returning to continuously adjust the operation of the pump A through a PID algorithm; and when the system pressure difference is smaller than the preset pump withdrawing pressure difference or the duration time of the system pressure difference larger than the preset pump withdrawing pressure difference is not larger than the overflow pump withdrawing delay, returning to continuously adjust the operation of the pump A through a PID algorithm.
A high pressure purge control system, comprising:
a data acquisition module: the system is used for acquiring the system pressure in the high-pressure cleaning pipeline and the running state of the water pump in real time;
a calculation module: the device is used for processing the acquired data and a preset value to obtain a calculation result;
a control module: and the control module is used for adjusting the starting sequence and the starting number of the pumps based on the calculation result obtained by the calculation module.
Has the advantages that:
the high-pressure cleaning control method and the control system thereof solve the problem of high energy loss when multiple pumps of the high-pressure cleaning device run simultaneously, utilize the PID algorithm to carry out automatic adjustment, reduce the opening amount of the water pump when relative low pressure is needed, and increase the opening amount of the water pump when relative high pressure is needed, thereby effectively carrying out automatic management on the water pump, prolonging the service life of the water pump, and reducing energy loss and equipment maintenance cost.
Drawings
FIG. 1 is a schematic flow diagram of a high pressure cleaning control method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a high pressure purge control system according to an embodiment of the present invention;
FIG. 3 is a schematic control flow diagram of the high pressure purge control system according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for illustrating the present invention and not for limiting the present invention.
A high pressure purge control method, comprising: the method comprises the steps of acquiring system pressure in the high-pressure cleaning pipeline and the running state of the water pumps in real time, and automatically adjusting the starting sequence and the starting number of the water pumps based on the difference value between the acquired system pressure and a preset target pressure. The running state of the water pump comprises the opening and closing of the water pump, the quantity of the water pump and the running frequency of the water pump, and the target pressure is set according to actual use requirements.
Further, as shown in fig. 1, S100, before the system is started, obtaining a current system pressure in the high-pressure cleaning pipeline;
s200, comparing the acquired system pressure with a preset low-pressure starting pressure, and starting the pump A when the system pressure is lower than the low-pressure starting pressure, wherein the low-pressure starting pressure is the minimum pressure requirement value of the water pressure of the pipeline;
s300, obtaining system pressure in the high-pressure cleaning pipeline after the pump A is started, comparing the system pressure with a preset target pressure, obtaining the current operation frequency of the pump A when the system pressure is smaller than the target pressure, judging whether the current operation frequency of the pump A is a rated working frequency or not, and starting the pump B if the current operation frequency of the pump A is the rated working frequency.
Further, when the system pressure is lower than the low-pressure starting pressure, the duration of the state that the system pressure is lower than the low-pressure starting pressure is obtained, the obtained duration is compared with the preset pressure maintaining delay time, and if the duration is larger than the preset pressure maintaining delay time, the pump A is started. The pressure maintaining time delay is set according to the system stability requirement, so that the error detection is avoided, and individual abnormal data are filtered.
Further, when the system pressure is smaller than the target pressure and the current operating frequency of the pump A is the rated operating frequency, the system pressure difference is obtained through calculation by using the obtained system pressure and the target pressure, the calculated system pressure difference is compared with a preset multi-pump pressure difference, if the system pressure difference is larger than the multi-pump pressure difference, the pump B is started, and the multi-pump pressure difference is determined through fine adjustment up and down according to the pressure value increased by the system after the single variable frequency motor operates at the minimum safe operating frequency.
Further, if the system pressure difference is greater than the preset multi-pump pressure difference, the duration time that the system pressure difference is greater than the preset multi-pump pressure difference is obtained, and if the duration time is greater than the preset pump delay time, the pump B is started. The pump adding delay time is set according to the system stability requirement, so that error detection is avoided, individual abnormal data are filtered, time is adjusted for the system, and pump adding processing is performed after no adjustment is performed.
Further, when the system pressure is greater than the target pressure and the current operating frequency of the pump A is the minimum safe operating frequency of the motor, the system pressure difference is obtained through calculation by using the obtained system pressure and the target pressure, the calculated system pressure difference is compared with a preset pump withdrawing pressure difference, if the system pressure difference is greater than the pump withdrawing pressure difference, the pump A is closed, and the pump withdrawing pressure difference is determined according to the upper and lower fine adjustment of the pressure value, reduced by the system, of the single variable frequency motor after the variable frequency motor operates at the minimum safe operating frequency.
Further, if the system pressure difference is greater than the preset pump withdrawal pressure difference, the duration that the system pressure difference is greater than the preset pump withdrawal pressure difference is obtained, and if the duration is greater than the preset overflow pump withdrawal delay time, the pump A is closed. The pump withdrawal delay time is set according to the system stability requirement, so that the error detection is avoided, individual abnormal data are filtered, the time is adjusted for the system, and the pump reduction processing is performed after no adjustment is performed.
Further, after the pump A is started, the operation of the pump A is adjusted by adopting a PID algorithm, and when the system pressure after the pump A is started is equal to a preset target pressure, the operation state of the pump A of the PID algorithm is maintained.
Further, when the system pressure is lower than the target pressure and the current operation frequency of the pump A is not the rated operation frequency, returning to continuously adjust the operation of the pump A through a PID algorithm; when the system pressure difference is smaller than the preset multi-pump adding pressure difference or the duration time of the system pressure difference larger than the preset multi-pump adding pressure difference is not larger than the preset adding pump delay time, returning to continuously adjust the operation of the pump A through a PID algorithm; when the system pressure is greater than the target pressure and the current operating frequency of the pump A is not the minimum safe operating frequency of the motor, returning to continuously adjust the operation of the pump A through a PID algorithm; and when the system pressure difference is smaller than the preset pump withdrawing pressure difference or the duration time of the system pressure difference larger than the preset pump withdrawing pressure difference is not larger than the overflow pump withdrawing delay, returning to continuously regulate the operation of the water pump through the PID algorithm.
The coefficient A is added in the PID algorithm, the pressure difference is within the allowable range of the equipment, the frequency regulation is stopped, the system stably runs, and the formula of the water pump regulation algorithm is optimized as follows:
wherein Kp is a proportionality coefficient; t: sampling time;
an integration time constant; td: a differential time constant; ek: error of the Kth sampling and the target;
error of the K-1 sampling and the target; e.g. of the typek-2: the error of the k-2 sample with the target; u shapek: outputting the current quantity;
previous output; Δ uk: the increment is output this time.
As shown in fig. 2, a high pressure purge control system includes:
the data acquisition module 100: the system is used for acquiring the system pressure in the high-pressure cleaning pipeline and the running state of the water pump in real time;
the calculation module 200: the data acquisition module 100 is used for processing the data acquired by the data acquisition module and a preset value to obtain a calculation result;
the control module 300: for adjusting the sequence and number of pump starts based on the calculation obtained by the calculation module 200.
Referring to fig. 3, which is a control flow chart of the dual-pump high-pressure cleaning control system, the control flow of the multiple pumps is similar, and the scheme is further described by a four-pump high-pressure cleaning control system:
after a control system is started, acquiring a pressure value of high-pressure water in a high-pressure cleaning pipeline input by analog quantity in real time, starting a pump A when the pressure is lower than low-pressure starting pressure and the duration time is longer than the pressure maintaining time, and regulating the operation of the pump A by the system through a PID algorithm; if the current system pressure is not equal to the target pressure preset by a user, when the system pressure is greater than the target pressure, continuously judging whether the operation frequency of the water pump is 20Hz of the minimum safe operation frequency of the motor, if not, returning to a PID algorithm to correspondingly regulate the pump A, if so, judging whether the system pressure difference is greater than a pump withdrawal pressure difference, when the system pressure difference is not greater than the pump withdrawal pressure difference, returning to the PID algorithm to regulate the operation state of the pump A, when the system pressure difference is greater than the pump withdrawal pressure difference and detecting that the system pressure difference is greater than the pump withdrawal pressure difference, starting timing by a timer, wherein the timing time is the duration time that the system pressure difference is greater than the pump withdrawal pressure difference, and when the duration time is greater than the preset overflow pump withdrawal delay time, proving that the system pressure difference is greater than the pump withdrawal pressure difference and is a credible result obtained under the condition that the pump is stable, at the moment, closing the pump A to reduce the pressure input, reducing the system pressure, and when the duration is less than or equal to the preset overflow pump withdrawal delay time, indicating that the system pressure difference is greater than the pump withdrawal pressure difference in an unstable state, and continuing to record until the overflow pump withdrawal delay time is exceeded; when the system pressure is smaller than the target pressure, continuously judging whether the running frequency of the water pump is 50Hz of the rated frequency of the motor, if not, returning to the PID algorithm to correspondingly regulate the A pump, if so, judging whether the system pressure difference is larger than the multi-pump pressure difference, if not, returning to the PID algorithm to regulate the running state of the A pump, if the system pressure difference is larger than the multi-pump pressure difference and a timer starts to time when the system pressure difference is detected to be larger than the multi-pump pressure difference, wherein the time is the duration time of the system pressure difference larger than the multi-pump pressure difference, and when the duration time is larger than the preset pump delay time, proving that the system pressure difference is larger than the multi-pump pressure difference and is a credible result obtained under the condition that the pump is stable, at the moment, starting the B pump action is executed, so that the pressure input is increased, the system pressure is increased, and when the duration time is smaller than or equal to the preset pump delay time, showing that the system pressure difference is larger than the multi-pump pumping pressure difference in an unstable state, and continuously recording until the pumping delay time is exceeded; it should be noted that the duration needs to be a continuous one-phase duration that begins recording after the state is reached, and ends recording after the preset pump-in delay or pump-out delay duration is reached, rather than the cumulative duration of all the states reached. After the pump B is started, the PID algorithm regulates the operation of the pump B, the regulating process and the method are consistent with the PID algorithm regulating the operation of the pump A, the difference is that the action of closing the pump B is executed when the system pressure is still greater than the target pressure when the operation frequency of the pump B is regulated to a limit value, and the action of starting the pump C is executed when the system pressure is still less than the target pressure when the operation frequency of the pump B is regulated to another limit value. After the pump C is started, the PID algorithm regulates the operation of the pump C, the regulating process and the regulating method are consistent with the PID algorithm regulating the operation of the pump A and the pump B, the difference is only that when the system pressure is still greater than the target pressure when the operation frequency of the pump C is regulated to a limit value, the action of closing the pump C is executed, and when the system pressure is still less than the target pressure when the operation frequency of the pump C is regulated to another limit value, the action of starting the pump D is executed. After the D pump is started, the PID algorithm adjusts the operation of the D pump, the adjusting process and the method are consistent with the PID algorithm for adjusting the operation of the A pump, the B pump and the C pump, the difference is that when the system pressure is still greater than the target pressure when the D pump operation frequency is adjusted to a limit value, the action of closing the D pump is executed, when the system pressure is still less than the target pressure when the D pump operation frequency is adjusted to another limit value, the PID algorithm is returned to adjust the operation instruction of the D pump, at the moment, the high-pressure cleaning equipment reaches a full load state, the maximum system output pressure is obtained, and the control system prompts a user that the target pressure exceeds the range through a display or an alarm system and needs to be reset by the user.
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (2)
1. A high pressure purge control method, comprising: acquiring system pressure in a high-pressure cleaning pipeline and the running state of a water pump in real time, and automatically adjusting the starting sequence and the starting number of the water pump based on the difference value between the acquired system pressure and a preset target pressure;
before the system is started, acquiring the current system pressure in the high-pressure cleaning pipeline;
comparing the acquired system pressure with a preset low-pressure starting pressure, and starting the pump A when the system pressure is lower than the low-pressure starting pressure, wherein the low-pressure starting pressure is the minimum pressure requirement value of the water pressure of the pipeline;
the method comprises the steps of obtaining system pressure in a high-pressure cleaning pipeline after a pump A is started, comparing the system pressure with a preset target pressure, obtaining the current operation frequency of the pump A when the system pressure is smaller than the target pressure, judging whether the current operation frequency of the pump A is a rated working frequency or not, and starting a pump B if the current operation frequency of the pump A is the rated working frequency;
when the system pressure is lower than the low-pressure starting pressure, obtaining the duration of the state that the system pressure is lower than the low-pressure starting pressure, comparing the obtained duration with the preset pressure maintaining delay time, and if the duration is greater than the preset pressure maintaining delay time, starting the pump A;
when the system pressure is lower than the target pressure and the current operating frequency of the pump A is the rated operating frequency, calculating to obtain a system pressure difference by using the obtained system pressure and the target pressure, comparing the calculated system pressure difference with a preset multi-pump pressure difference, and starting the pump B if the system pressure difference is higher than the multi-pump pressure difference, wherein the multi-pump pressure difference is determined by fine adjustment up and down according to a pressure value increased by the system after a single variable frequency motor operates at the minimum safe operating frequency;
if the system pressure difference is larger than the preset multi-pump pressure difference, acquiring the duration time that the system pressure difference is larger than the preset multi-pump pressure difference, and if the duration time is larger than the preset pump delay time, starting the pump B;
when the system pressure is greater than the target pressure and the current operating frequency of the pump A is the minimum safe operating frequency of the motor, calculating to obtain a system pressure difference by using the obtained system pressure and the target pressure, comparing the calculated system pressure difference with a preset pump withdrawing pressure difference, and if the system pressure difference is greater than the pump withdrawing pressure difference, closing the pump A, wherein the pump withdrawing pressure difference is determined by fine adjustment up and down according to a pressure value reduced by the system after the single variable frequency motor operates at the minimum safe operating frequency;
if the system pressure difference is larger than the preset pump withdrawing pressure difference, acquiring the duration that the system pressure difference is larger than the preset pump withdrawing pressure difference, and if the duration is larger than the preset overflow pump withdrawing delay time, closing the pump A;
after the pump A is started, the operation of the pump A is regulated by adopting a PID algorithm, and when the system pressure after the pump A is started is equal to a preset target pressure, the operation state of the pump A of the PID algorithm is maintained;
when the system pressure is smaller than the target pressure and the current operating frequency of the pump A is not the rated operating frequency, returning to continuously adjust the operation of the pump A through a PID algorithm; when the system pressure difference is smaller than the preset multi-pump adding pressure difference or the duration time of the system pressure difference larger than the preset multi-pump adding pressure difference is not larger than the preset adding pump delay time, returning to continuously adjust the operation of the pump A through a PID algorithm; when the system pressure is greater than the target pressure and the current operation frequency of the pump A is not the minimum safe operation frequency of the motor, returning to continuously adjust the operation of the pump A through a PID algorithm; and when the system pressure difference is smaller than the preset pump withdrawing pressure difference or the duration time of the system pressure difference larger than the preset pump withdrawing pressure difference is not larger than the overflow pump withdrawing delay, returning to continuously adjust the operation of the pump A through a PID algorithm.
2. A high pressure purge control system, comprising:
a data acquisition module: the system is used for acquiring the system pressure in the high-pressure cleaning pipeline and the running state of the water pump in real time;
a calculation module: the device is used for processing the acquired data and a preset value to obtain a calculation result;
a control module: the system is used for adjusting the starting sequence and the starting number of the pumps based on the calculation result obtained by the calculation module;
the data acquisition module, the computer module and the control module operate according to the high pressure cleaning control method as claimed in claim 1.
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| WO2010128749A1 (en) * | 2009-05-07 | 2010-11-11 | 주식회사 대영파워펌프 | Method for controlling an inverter booster pump |
| CN104153425A (en) * | 2014-08-21 | 2014-11-19 | 巢湖市金辉自控设备有限公司 | Constant-pressure water supply system |
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