CN113374693A - Roots screw pump unit control method, system, terminal and storage medium - Google Patents
Roots screw pump unit control method, system, terminal and storage medium Download PDFInfo
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- CN113374693A CN113374693A CN202110753801.5A CN202110753801A CN113374693A CN 113374693 A CN113374693 A CN 113374693A CN 202110753801 A CN202110753801 A CN 202110753801A CN 113374693 A CN113374693 A CN 113374693A
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- roots
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/02—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for several pumps connected in series or in parallel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
Abstract
The application relates to a control method, a control system, a control terminal and a storage medium of a Roots screw pump unit, wherein the method comprises the steps of acquiring internal screw pressure data when a screw pump works; a Roots pump pressure database for storing the working pressure range of the Roots pump is preset; comparing the screw pressure data with the Roots pressure data in the Roots pump pressure database; and starting the roots pump when the screw pressure data reaches the minimum roots pressure data in the roots pressure database. This application has the starting pressure and the start time that reduce lobe pump for lobe screw pump unit can drop into the effect of work fast.
Description
Technical Field
The application relates to the field of roots screw pump units, in particular to a control method and a control system of a roots screw pump unit.
Background
At present, in many industries, a roots pump and a screw pump are combined for air suction, and when the combined type screw pump is used, the screw pump is started firstly, and then the roots pump is started after the pressure is reached.
In the correlation technique, the screw pump is as the backing pump of unit, can be in operating condition always, and lobe pump itself has the operating pressure scope, only when the screw pump work back internal pressure reaches lobe pump operating pressure scope, lobe pump just starts work, and under general condition, lobe pump is that it just starts to need the screw pump to reach the higher pressure in lobe pump operating pressure scope, for the screw pump, the time that lasting increase internal pressure is spent is also more, and then make lobe pump's start-up time produce corresponding increase, the speed that leads to whole unit to put into operation is slower.
Disclosure of Invention
In order to reduce the starting pressure and the starting time of the roots pump and enable the roots screw pump unit to be rapidly put into operation, the application provides a control method, a control system, a control terminal and a storage medium for the roots screw pump unit.
In a first aspect, the present application provides a roots screw pump unit control method, which adopts the following technical scheme:
a control method of a Roots screw pump unit comprises the following steps:
acquiring screw pressure data inside the screw pump when the screw pump works;
a Roots pump pressure database for storing the working pressure range of the Roots pump is preset;
comparing the screw pressure data with the minimum Roots pressure data in the Roots pump pressure database;
and starting the roots pump when the screw pressure data reaches the minimum roots pressure data in the roots pressure database.
Through adopting above-mentioned technical scheme, when the screw pump begins work, when internal pressure risees the minimum roots pressure data in the roots pump pressure database, minimum in the operating pressure scope that the roots pump started promptly, the roots pump can start work to reduce roots pump's starting pressure and start-up time, and then guarantee that the unit can put into operation fast, be favorable to improving work efficiency.
Optionally, when the roots pump is started and the internal pressure reaches the minimum roots pressure data, the minimum roots pressure data is kept to work.
Through adopting above-mentioned technical scheme, through keeping the roots pump at minimum roots pressure work to when making the roots pump just start, work according to minimum roots pressure earlier, in order to adapt to the follow-up pressure that risees gradually of inside.
Optionally, the roots pump starts and in-process that internal pressure risees to minimum roots pressure data, include:
recording the initial time when the screw pressure data of the screw pump reaches the minimum Roots pressure data and the termination time when the Roots pressure of the Roots pump reaches the minimum Roots pressure data;
calculating the time difference between the termination time and the initial time to serve as the starting time for reaching the working pressure after the roots pump is started;
comparing the starting time with a preset starting threshold time of the roots pump;
when the starting time is less than the starting threshold time, the roots pump is kept to work under the minimum roots pressure data; and when the starting time is greater than the starting threshold time, the starting process of the roots pump is checked.
Through adopting above-mentioned technical scheme, after the lobe pump starts, examine through the start time to the lobe pump to guarantee that the lobe pump all is normal start, lead to the condition of the unable normal work of unit when reducing the lobe pump and appearing abnormal starting.
Optionally, when the starting process of the roots pump is verified, the method includes:
selecting intermediate Roots pressure data in the Roots pressure database, wherein the intermediate Roots pressure data have the same difference value with the minimum Roots pressure data and the maximum Roots pressure data;
continuously increasing the internal pressure of the roots pump to intermediate roots pressure data and acquiring the inspection time for increasing the internal pressure of the roots pump from the minimum roots pressure data to the intermediate roots pressure data;
comparing the detection time with a preset Roots pump detection threshold time;
when the inspection time is less than the inspection threshold time, reducing the internal pressure of the roots pump to the minimum roots pressure data and keeping working; and when the checking time is greater than the checking threshold time, stopping the work of the roots pump.
Through adopting above-mentioned technical scheme, when the starting process to the lobe pump is examined, after the lobe pump internal pressure reached minimum roots pressure data, continuously rise to middle roots pressure data again to required check-up time when obtaining to rise, can still step up to required target pressure in the regulation time even guarantee the lobe pump start time is long.
Optionally, the roots pump pressure database comprises a roots pump low-pressure database corresponding to low-pressure work of the screw pump, a roots pump pressure stabilizing database corresponding to pressure stabilizing work of the screw pump, and a roots pump high-pressure database corresponding to high-pressure work of the screw pump;
when the internal screw pressure data of the screw pump during working reaches the minimum roots pressure data of any one of the roots pump low-pressure database, the roots pump pressure-stabilizing database or the roots pump high-pressure database, the roots pump is started until the internal pressure reaches the minimum roots pressure data of the corresponding database.
Through adopting above-mentioned technical scheme, divide into lobe pump low pressure database, lobe pump steady voltage database or reach lobe pump high pressure database with lobe pump pressure database to make the unit when handling the working scene of different pressures, the adjustment of adaptation can be done to the inside pressure of lobe pump, guarantees the normal work of unit.
Optionally, when the roots pump is started until the internal pressure reaches the minimum roots pressure data of the corresponding database, the starting process is checked when the starting time is longer than the starting threshold time.
Through adopting above-mentioned technical scheme, through carrying out the inspection to the start-up time of lobe pump to guarantee that the lobe pump homoenergetic keeps normal start at arbitrary pressure within range.
Optionally, screw pump internal pressure reaches minimum roots pressure data in arbitrary database of low pressure, steady voltage and high pressure, carries out the inspection of start-up process to the roots pump, includes:
selecting intermediate Roots pressure data in a Roots low-pressure, pressure-stabilizing and high-pressure database;
continuously increasing or decreasing the internal pressure of the Roots pump to each selected intermediate Roots pressure data;
acquiring the inspection time of increasing or decreasing the internal pressure of the roots pump from the minimum roots pressure data to each intermediate roots pressure data;
comparing each inspection time with a preset inspection threshold time of the corresponding roots pump;
when each inspection time is less than the inspection threshold time, the Roots pump is kept working; and when any one of the test time is greater than the test threshold time, stopping the work of the Roots pump.
Through adopting above-mentioned technical scheme, to the work scene of different pressures, all inspect the start-up process of lobe pump to guarantee the normal work of roots.
The second aspect, the application provides a roots screw pump unit control system, adopts following technical scheme:
a roots screw pump unit control system comprising:
the data acquisition module is used for acquiring the internal screw pressure data of the screw pump during working;
the database module is used for storing a Roots pump pressure database within the working pressure range of the Roots pump;
the comparison module is used for comparing the screw pressure data with the Roots pressure data in the Roots pump pressure database;
and the judging module is used for starting the roots pump until the internal pressure of the roots pump reaches the minimum roots pressure data when the screw pressure data reaches the minimum roots pressure data in the roots pressure database, and keeping the minimum roots pressure data to work.
In a third aspect, the present application provides an intelligent terminal, which adopts the following technical scheme:
an intelligent terminal comprises a memory and a processor, wherein the memory is stored with a computer program which can be loaded by the processor and can execute any one of the Roots screw pump unit control methods.
In a fourth aspect, the present application provides a computer-readable storage medium, which adopts the following technical solutions:
a computer readable storage medium storing a computer program which can be loaded by a processor and executed to perform any one of the roots screw pump unit control methods described above.
In summary, the present application includes at least one of the following beneficial technical effects:
set up the minimum for the operating pressure within range through the starting pressure with lobe pump to reduce lobe pump's starting pressure and start-up time, and then guarantee that the unit can drop into work fast, be favorable to improving work efficiency.
Drawings
FIG. 1 is a first flowchart of a control method of a Roots screw pump unit in an embodiment of the present application.
FIG. 2 is a second flowchart of the control method of the Roots screw pump unit in the embodiment of the present application.
Fig. 3 is a flowchart of a sub-step of step S800 in the embodiment of the present application.
Fig. 4 is a flowchart illustrating the sub-steps of step S800 in the embodiment of the present application.
Fig. 5 is a block diagram of a roots screw pump unit control system in the embodiment of the present application.
Description of reference numerals: 1. a data acquisition module; 2. a database module; 3. a comparison module; 4. a judgment module; 5. a first time acquisition module; 6. a time calculation module; 7. a first comparison module; 8. a control module; 9. a first data selection module; 10. a voltage regulating module; 11. a second comparison module; 12. a checking module; 13. a second data selection module; 14. a second time acquisition module; 15. and a third comparing module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to fig. 1-5 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The embodiment of the application discloses a control method of a Roots screw pump unit.
Referring to fig. 1, the roots screw pump unit control method includes the following steps:
and step S100, acquiring internal screw pressure data when the screw pump works.
Specifically, when the unit works, the screw pump works firstly, the pressure in the screw pump is gradually increased in the working process, and in the process, the pressure value in the screw pump is obtained to serve as screw pressure data.
And step S200, presetting a Roots pump pressure database for storing the working pressure range of the Roots pump.
Specifically, to the lobe pump, the inside produced operating pressure of during operation has corresponding operating pressure scope, and the start-up work of lobe pump is gone on again after the inside pressure reaches the operating pressure scope of lobe pump after screw pump work, and to the operating pressure scope of lobe pump, through establishing the lobe pump pressure database, the operating pressure scope of lobe pump adopts the form of specific roots pressure data to save to there is specific data value to contrast after making the internal pressure of screw pump rise.
And step S300, comparing the screw pressure data with the minimum Roots pressure data in the Roots pump pressure database.
And step S400, starting the roots pump when the screw pressure data reaches the minimum roots pressure data in the roots pressure database.
Specifically, after the screw pump works, the obtained screw pressure data is compared with the Roots pressure data in the Roots pump pressure database in size, and when the obtained screw pressure data is the same as the minimum Roots pressure data, the Roots pump starts to work; in this embodiment specifically adopt PLC to obtain the inside screw pressure data of screw pump to feed back the converter when screw pressure data reaches minimum roots pressure data, control the lobe pump by the converter and start, reach minimum roots pressure data until lobe pump internal pressure, the lobe pump need keep working at minimum roots pressure data this moment, so that can remove adaptation internal pressure intensity gradually after the lobe pump starts.
Therefore, the roots screw pump unit control method enables the roots pump to start working when the internal pressure reaches the minimum roots pressure data after the screw pump works, reduces the starting pressure and the starting time of the roots pump, enables the roots screw pump unit to be put into work quickly, and is beneficial to improving the working efficiency.
Referring to fig. 2, further, the process of starting the roots pump and gradually increasing the internal pressure to the minimum roots pressure data comprises the following steps:
step S500, recording the initial time when the screw pressure data of the screw pump reaches the minimum Roots pressure data and the termination time when the Roots pressure of the Roots pump reaches the minimum Roots pressure data;
specifically, when the pressure in the screw pump starts to work and rises from zero to the minimum Roots pressure data, a corresponding time node is recorded to be used as initial time; when the roots pump is started and the internal pressure is increased from zero to the minimum roots pressure data, the corresponding time node is recorded and used as the termination time, and the termination time is larger than the initial time.
And step S600, calculating the time difference between the ending time and the initial time to serve as the starting time for reaching the working pressure range after the roots pump is started.
Specifically, the recorded end time is subtracted from the recorded initial time to obtain a corresponding time difference, the time difference is used as the starting time for increasing the internal pressure of the roots pump from zero to the working pressure range after the roots pump is started, and the minimum roots pressure data is selected as the basis in the working pressure range to which the roots pump is added in the embodiment.
And step S700, comparing the starting time with the preset starting threshold time of the roots pump.
Step S800, when the starting time is less than the starting threshold time, the roots pump is kept working under the minimum roots pressure data; and when the starting time is greater than the starting threshold time, the starting process of the roots pump is checked.
Specifically, under the condition that the starting threshold time of the roots pump is normal, the time required by the internal pressure of the roots pump to rise from zero to the minimum roots pressure data after the roots pump is started is calculated, and the starting time is compared with the starting threshold time of the roots pump; when the starting time is less than the starting threshold time, the current roots pump can be within the specified threshold time, the internal pressure can be increased from zero to the minimum roots pressure, when the starting time is greater than the starting threshold time, the time spent by the current roots pump from zero to the minimum roots pressure exceeds the specified threshold time, and at the moment, the pressurization process after the roots pump is started needs to be checked to see whether the roots pump can be used continuously or not.
Referring to fig. 3, when the starting time of the roots pump is greater than the starting threshold time and the pressurization process after the roots pump is started needs to be checked, the method specifically comprises the following steps:
and step S810, selecting intermediate Roots pressure data which are the same as the difference value of the minimum Roots pressure data and the maximum Roots pressure data in the Roots pressure database.
Specifically, in roots's pressure database, all roots's pressure data all are roots's pressure data that can reach after the roots pump starts, arrange the roots's pressure data in the roots's pressure data according to from big to little when examining, choose middle roots's pressure data in all roots's pressure data after arranging in order, what need guarantee is the difference of middle roots's pressure data and the minimum roots's pressure data in the database, and the difference of the biggest roots's pressure data in middle roots's pressure data and the database, both need be the same.
And step S811, continuously increasing the internal pressure of the roots pump to the intermediate roots pressure data and acquiring the inspection time for increasing the internal pressure of the roots pump from the minimum roots pressure data to the intermediate roots pressure data.
Specifically, because the pressure that reaches after the lobe pump starts is the minimum roots pressure in the roots pressure database, and the middle roots pressure data of choosing is inevitable to be greater than minimum roots pressure data, consequently reach minimum roots pressure data back at roots pump internal pressure, want to make roots pump internal pressure reach middle roots pressure data, need improve roots pump internal pressure, rise to the in-process of middle roots pressure data by minimum roots pressure data with roots pump internal pressure, acquire the time that this process was spent, in order to regard as check-out time.
And step S812, comparing the checking time with a preset Roots pump checking threshold time.
Step S813, when the checking time is less than the checking threshold time, reducing the internal pressure of the Roots pump to the minimum Roots pressure data and keeping working; and when the checking time is greater than the checking threshold time, stopping the work of the roots pump.
Specifically, when the threshold value time of the roots pump is detected to be normal, after the internal pressure of the roots pump reaches the minimum roots pressure data, the internal pressure of the roots pump continues to rise to the time required by the intermediate roots pressure data; in the working process of the roots screw pump unit, the internal pressure is gradually increased due to the fact that the roots pump is just started, but the internal pressure cannot be increased from zero to the minimum roots pressure within the starting threshold time, but the situation that the roots pump is damaged and cannot work can not be directly judged; the testing time spent on the internal pressure of the roots pump reaching the minimum roots pressure data and continuously increasing the data to the middle roots pressure data can be tested.
Specifically, the inspection time required for continuously increasing the internal pressure of the roots pump from the minimum roots pressure data to the intermediate roots pressure data is compared with the inspection threshold time of the roots pump; when the checking time is less than the checking threshold time, the internal pressure of the roots pump can be increased from the minimum roots pressure data to the intermediate roots pressure data within the checking threshold time of the roots pump, and the time spent when the roots pump starts to start can be indicated to be more, but the internal pressure can be increased later to keep up with that of the normal roots pump;
when the inspection time is longer than the inspection threshold time, the time spent by pressurizing the pressure in the current roots pump from the minimum roots pressure data to the intermediate roots pressure data exceeds the inspection threshold time of the roots pump, and the roots pump can be stopped and overhauled.
Referring to fig. 4, in addition, for different work scenes that need to be pumped, the pressures that need to be reached inside the screw pump and the roots pump are different, and in order to deal with different scenes, the screw pump and the roots pump can provide corresponding pumping pressures, and the pumping pressure is classified into three states of low pressure, stable pressure and high pressure.
According to three states, the pressure database of the roots pump comprises a low-pressure database of the roots pump corresponding to the low-pressure work of the screw pump, a pressure-stabilizing database of the roots pump corresponding to the pressure-stabilizing work of the screw pump and a high-pressure database of the roots pump corresponding to the high-pressure work of the screw pump.
When the work scene that the screw pump unit reply only needs the low pressure to bleed, the lobe pump only need keep internal pressure can in the pressure data within range of lobe pump low pressure database, this moment if need the lobe pump start work, the screw pump during operation need make inside screw pressure data rise and reach the minimum roots pressure data in the lobe pump low pressure database can, after the pressure inside the screw pump reaches minimum roots pressure data, the lobe pump starts the minimum roots pressure data in reaching the lobe pump low pressure database until internal pressure, and keep minimum roots pressure data work.
When the work scene that the screw pump unit reply only needs the steady voltage to bleed, the lobe pump only need keep internal pressure can in the pressure data within range of lobe pump steady voltage database, this moment if need the lobe pump start work, the screw pump during operation need make inside screw pressure data rise and reach the minimum roots pressure data in the lobe pump steady voltage database can, pressure inside the screw pump reaches minimum roots pressure data after, the lobe pump starts the minimum roots pressure data in reaching the lobe pump steady voltage database until internal pressure, and keep minimum roots pressure data work.
When the work scene that the screw pump unit reply only needs the high pressure to bleed, the lobe pump only need keep internal pressure can in the pressure data within range of lobe pump high pressure database, this moment if need the lobe pump start work, the screw pump during operation need make inside screw pressure data rise and reach the minimum roots pressure data in the lobe pump high pressure database can, pressure inside the screw pump reaches minimum roots pressure data after, the lobe pump starts the minimum roots pressure data in reaching the lobe pump high pressure database until internal pressure, and keep minimum roots pressure data work.
And to roots's screw pump unit, no matter the work scene of reply low pressure, steady voltage or high pressure bleed, when roots's pump starts to the minimum roots pressure data that internal pressure reached corresponding database, if the start-up time of roots's pump appears is greater than the start-up threshold value time, all needs to inspect the start-up process of roots's pump.
Compare in placing same roots pump pressure database with all roots pump pressure data, divide into three kinds of state data with the data in roots pump pressure database to make roots pump pressure database form roots pump low pressure database, roots pump steady voltage database and roots pump high pressure database, it is different to start in-process inspection mode.
After forming lobe pump low pressure database, lobe pump steady voltage database and lobe pump high pressure database with lobe pump pressure database, reaching minimum lobe pressure data in low pressure, steady voltage and the arbitrary database of high pressure when screw pump internal pressure, the inspection to lobe pump start-up process specifically includes following step:
and S820, selecting intermediate Roots pressure data in the Roots low-pressure, pressure-stabilizing and high-pressure database.
Specifically, when the roots screw pump unit corresponds the work scene of high pressure pumping, the roots pump starts and when the internal pressure reaches the minimum roots pressure data in the roots pump high pressure database, selects the middle roots pressure data of these three databases of roots low pressure database, roots steady voltage database and roots high pressure database.
When the roots screw pump unit corresponds the job scenario of steady voltage pumping, when the roots pump starts and the internal pressure reaches the minimum roots pressure data in the roots pump steady voltage database, select the middle roots pressure data of these three databases of roots low pressure database, roots steady voltage database and roots high pressure database.
When the roots screw pump unit is used for dealing with a working scene of high-pressure air exhaust, the roots pump is started, and when the internal pressure reaches the minimum roots pressure data in the roots pump high-pressure database, the middle roots pressure data of the three databases of the roots low-pressure database, the roots pressure-stabilizing database and the roots high-pressure database are selected.
In step S821, the internal pressure of the roots pump is continuously raised or lowered to each selected intermediate roots pressure data.
Specifically, when the lobe pump starts and internal pressure reaches the minimum roots pressure data in the lobe pump high pressure database, and after selecting roots low pressure, steady voltage and the middle roots pressure data in the high pressure database, reduce this moment lobe pump internal pressure to roots low pressure, the middle roots pressure data of steady voltage database, rise this moment the middle roots pressure data of lobe pump internal pressure to roots high pressure database.
When the lobe pump starts and internal pressure reaches the minimum roots pressure data in the lobe pump steady voltage database to after selecting the middle roots pressure data in roots low pressure, steady voltage and the high pressure database, reduce the middle roots pressure data of lobe pump internal pressure to roots low pressure database this moment, rise the middle roots pressure data of lobe pump internal pressure to roots steady voltage, high pressure database this moment.
When the roots pump starts and the internal pressure reaches the minimum roots pressure data in the roots pump low pressure database, and after selecting the middle roots pressure data in roots low pressure, pressure stabilizing and high pressure databases, the internal pressure of the roots pump at the moment is increased to the middle roots pressure data in roots low pressure, pressure stabilizing and high pressure databases.
And step S822, acquiring the inspection time of the internal pressure of the Roots pump increased or decreased from the minimum Roots pressure data to each intermediate Roots pressure data.
Specifically, when the lobe pump starts and internal pressure reaches minimum roots pressure data in the lobe pump high pressure database, and select roots low pressure, behind the middle roots pressure data in steady voltage and the high pressure database, it reduces to roots low pressure by minimum roots pressure data in the lobe pump high pressure database to obtain lobe pump internal pressure, two check-up times of the middle roots pressure data of steady voltage database, it rises to roots pressure data's in the middle of roots pressure data of roots high pressure database by minimum roots pressure data in the lobe pump high pressure database to obtain lobe pump internal pressure.
When the roots pump starts and internal pressure reaches the minimum roots pressure data in the roots pump pressure-stabilizing database, and select roots low pressure, after the middle roots pressure data in steady voltage and the high-pressure database, obtain that the roots pump internal pressure is reduced to the check time of the middle roots pressure data of roots low pressure database by the minimum roots pressure data in the roots pump pressure-stabilizing database, obtain that the roots pump internal pressure is risen to roots steady pressure by the minimum roots pressure data in the roots pump pressure-stabilizing database, two check times of the middle roots pressure data of high-pressure database.
When the roots pump starts and the internal pressure reaches the minimum roots pressure data in the roots pump low-pressure database, after selecting the middle roots pressure data in the roots low-pressure, pressure-stabilizing and high-pressure databases, the three check times of the internal pressure of the roots pump, which is increased to the middle roots pressure data in the roots low-pressure, pressure-stabilizing and high-pressure databases from the minimum roots pressure data in the roots pump pressure-stabilizing database, are obtained.
And step S823, comparing each checking time with the preset corresponding checking threshold time of the roots pump.
Step S824, when each checking time is less than the checking threshold time, keeping the Roots pump working; and when any one of the test time is greater than the test threshold time, stopping the work of the Roots pump.
Specifically, when the roots pump is started and the internal pressure reaches the minimum roots pressure data in the roots pump high-pressure database, after two check times of the intermediate roots pressure data of the roots pump internal pressure reduced from the minimum roots pressure data in the roots pump high-pressure database to the roots low-pressure and pressure-stabilizing database and one check time of the internal pressure of the roots pump increased from the minimum roots pressure data in the roots pump high-pressure database to the intermediate roots pressure data in the roots pump high-pressure database are obtained, the three check times are compared with the corresponding check threshold time in size; when each inspection time is less than the corresponding inspection threshold time, the roots pump can be started normally, and the minimum roots pressure data of the roots pump in a high-pressure database of the roots pump is kept to work; when any one of the three check times is larger than the corresponding check threshold time, the starting of the roots pump is indicated to be in a problem, and the roots pump needs to be stopped.
When the roots pump is started and the internal pressure reaches the minimum roots pressure data in the roots pump pressure stabilizing database, comparing the three check times with the corresponding check threshold time after acquiring a check time that the internal pressure of the roots pump is reduced from the minimum roots pressure data in the roots pump pressure stabilizing database to the middle roots pressure data in the roots low-pressure database and a check time that the internal pressure of the roots pump is increased from the minimum roots pressure data in the roots pump high-pressure stabilizing database to the middle roots pressure data in the roots pressure stabilizing and high-pressure database; when each inspection time is less than the corresponding inspection threshold time, the roots pump can be started normally, and the minimum roots pressure data of the roots pump in a high-pressure database of the roots pump is kept to work; when any one of the three check times is larger than the corresponding check threshold time, the starting of the roots pump is indicated to be in a problem, and the roots pump needs to be stopped.
When the roots pump is started and the internal pressure reaches the minimum roots pressure data in the roots pump low-pressure database, and after three inspection times of the internal pressure of the roots pump which is increased from the minimum roots pressure data in the roots pump high-low pressure database to the middle roots pressure data in the roots low-pressure, pressure-stabilizing and high-pressure databases are obtained, the three inspection times are compared with the corresponding inspection threshold time in size; when each inspection time is less than the corresponding inspection threshold time, the roots pump can be started normally, and the minimum roots pressure data of the roots pump in a high-pressure database of the roots pump is kept to work; when any one of the three check times is larger than the corresponding check threshold time, the starting of the roots pump is indicated to be in a problem, and the roots pump needs to be stopped.
The embodiment of the application also discloses a roots screw pump unit control system.
Referring to fig. 5, the roots screw pump unit control system includes:
the data acquisition module 1 is used for acquiring the internal screw pressure data of the screw pump during working;
the database module 2 stores a Roots pump pressure database within the working pressure range of the Roots pump;
the comparison module 3 is used for comparing the screw pressure data with the Roots pressure data in the Roots pump pressure database;
and the judgment module 4 is used for starting the roots pump until the internal pressure of the roots pump reaches the minimum roots pressure data when the screw pressure data reaches the minimum roots pressure data in the roots pressure database, and keeping the minimum roots pressure data to work.
The first time acquisition module 5 is used for recording the initial time when the screw pressure data of the screw pump reaches the minimum roots pressure data and the termination time when the roots pressure of the roots pump reaches the minimum roots pressure data in the process that the roots pump is started and the internal pressure is increased to the minimum roots pressure data;
the time calculation module 6 is used for calculating the time difference between the termination time and the initial time to be used as the starting time for reaching the working pressure after the roots pump is started;
the first comparison module 7 is used for comparing the starting time with the preset starting threshold time of the roots pump;
the control module 8 is used for keeping the roots pump to work under the minimum roots pressure data when the starting time is less than the starting threshold time; and when the starting time is greater than the starting threshold time, the starting process of the roots pump is verified.
The first data selection module 9 is used for selecting intermediate roots pressure data which are the same as the minimum roots pressure data and the maximum roots pressure data in the roots pressure database when the starting process of the roots pump needs to be checked;
the pressure regulating module 10 is used for continuously increasing the internal pressure of the roots pump to intermediate roots pressure data and acquiring the inspection time for increasing the internal pressure of the roots pump from the minimum roots pressure data to the intermediate roots pressure data;
the second comparison module 11 is used for comparing the inspection time with the preset inspection threshold time of the roots pump;
when the inspection time is less than the inspection threshold time, the control module 8 reduces the internal pressure of the roots pump to the minimum roots pressure data and keeps working; when the verification time is greater than the verification threshold time, the control module 8 stops the roots pump from operating.
The roots pump pressure database in the database module 2 comprises a roots pump low-pressure database corresponding to the low-pressure work of the screw pump, a roots pump pressure-stabilizing database corresponding to the pressure-stabilizing work of the screw pump and a roots pump high-pressure database corresponding to the high-pressure work of the screw pump;
when the internal screw pressure data of the screw pump during working reach the minimum roots pressure data of any one database in the roots pump low-pressure database, the roots pump pressure-stabilizing database or the roots pump high-pressure database, the control module 8 controls the roots pump to be started until the internal pressure reaches the minimum roots pressure data of the corresponding database.
The inspection module 12 is used for inspecting the starting process when the starting time is longer than the starting threshold time when the internal pressure of the roots pump reaches the minimum roots pressure data of the corresponding database after the roots pump is started;
the second data selection module 13 is used for selecting intermediate roots pressure data in the roots low-pressure, pressure-stabilizing and high-pressure databases when the internal pressure of the screw pump reaches the minimum roots pressure data in any one of the low-pressure, pressure-stabilizing and high-pressure databases and the roots pump is tested in the starting process;
the pressure regulating module 10 continuously raises or lowers the internal pressure of the roots pump to each selected intermediate roots pressure data;
the second time acquisition module 14 is used for acquiring the inspection time of the internal pressure of the roots pump from the minimum roots pressure data to each intermediate roots pressure data;
the third comparison module 15 is used for comparing each detection time with the preset detection threshold time of the corresponding roots pump;
when each checking time is less than the checking threshold time, the control module 8 keeps the roots pump working; when either of the verification times is greater than the verification threshold time, the control module 8 stops the roots pump from operating.
The embodiment of the application also discloses an intelligent terminal.
The intelligent terminal comprises a memory and a processor, wherein the memory is stored with a computer program which can be loaded by the processor and can execute the control method of the Roots screw pump unit.
The embodiment of the application also discloses a computer readable storage medium.
Specifically, the computer-readable storage medium, which stores a computer program that can be loaded by a processor and executes the control method of the roots screw pump unit as described above, includes, for example: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.
The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Claims (10)
1. A control method of a Roots screw pump unit is characterized in that: the method comprises the following steps:
acquiring screw pressure data inside the screw pump when the screw pump works;
a Roots pump pressure database for storing the working pressure range of the Roots pump is preset;
comparing the screw pressure data with the minimum Roots pressure data in the Roots pump pressure database;
and starting the roots pump when the screw pressure data reaches the minimum roots pressure data in the roots pressure database.
2. A roots screw pump unit control method according to claim 1, characterized in that: and when the roots pump is started until the internal pressure reaches the minimum roots pressure data, the minimum roots pressure data is kept for working.
3. A roots screw pump unit control method according to claim 2, characterized in that: the roots pump starts and the internal pressure rises to the in-process of minimum roots pressure data, includes:
recording the initial time when the screw pressure data of the screw pump reaches the minimum Roots pressure data and the termination time when the Roots pressure of the Roots pump reaches the minimum Roots pressure data;
calculating the time difference between the termination time and the initial time to serve as the starting time for reaching the working pressure range after the roots pump is started;
comparing the starting time with a preset starting threshold time of the roots pump;
when the starting time is less than the starting threshold time, the roots pump is kept to work under the minimum roots pressure data; and when the starting time is greater than the starting threshold time, the starting process of the roots pump is checked.
4. A roots screw pump unit control method according to claim 3, characterized in that: when the starting process of the roots pump is verified, the method comprises the following steps:
selecting intermediate Roots pressure data in the Roots pressure database, wherein the intermediate Roots pressure data have the same difference value with the minimum Roots pressure data and the maximum Roots pressure data;
continuously increasing the internal pressure of the roots pump to intermediate roots pressure data and acquiring the inspection time for increasing the internal pressure of the roots pump from the minimum roots pressure data to the intermediate roots pressure data;
comparing the detection time with a preset Roots pump detection threshold time;
when the inspection time is less than the inspection threshold time, reducing the internal pressure of the roots pump to the minimum roots pressure data and keeping working; and when the checking time is greater than the checking threshold time, stopping the work of the roots pump.
5. The roots screw pump unit control method according to claim 4, characterized in that: the roots pump pressure database comprises a roots pump low-pressure database corresponding to the low-pressure work of the screw pump, a roots pump pressure-stabilizing database corresponding to the pressure-stabilizing work of the screw pump and a roots pump high-pressure database corresponding to the high-pressure work of the screw pump;
when the internal screw pressure data of the screw pump during working reaches the minimum roots pressure data of any one of the roots pump low-pressure database, the roots pump pressure-stabilizing database or the roots pump high-pressure database, the roots pump is started until the internal pressure reaches the minimum roots pressure data of the corresponding database.
6. A roots screw pump unit control method according to claim 5, characterized in that: when the roots pump is started until the internal pressure reaches the minimum roots pressure data of the corresponding database, the starting process is checked when the starting time is longer than the starting threshold time.
7. A roots screw pump unit control method according to claim 6, characterized in that: the screw pump internal pressure reaches minimum roots pressure data in low pressure, steady voltage and any one high pressure database, carries out the inspection of start-up process to the roots pump, includes:
selecting intermediate Roots pressure data in a Roots low-pressure, pressure-stabilizing and high-pressure database;
continuously increasing or decreasing the internal pressure of the Roots pump to each selected intermediate Roots pressure data;
acquiring the inspection time of increasing or decreasing the internal pressure of the roots pump from the minimum roots pressure data to each intermediate roots pressure data;
comparing each inspection time with a preset inspection threshold time of the corresponding roots pump;
when each inspection time is less than the inspection threshold time, the Roots pump is kept working; and when any one of the test time is greater than the test threshold time, stopping the work of the Roots pump.
8. The utility model provides a roots screw pump unit control system which characterized in that: the method comprises the following steps:
the data acquisition module (1) is used for acquiring the internal screw pressure data of the screw pump during working;
the database module (2) is used for storing a Roots pump pressure database within the working pressure range of the Roots pump;
the comparison module (3) is used for comparing the screw pressure data with the Roots pressure data in the Roots pump pressure database;
and the judging module (4) is used for starting the roots pump until the internal pressure of the roots pump reaches the minimum roots pressure data when the screw pressure data reaches the minimum roots pressure data in the roots pressure database, and keeping the minimum roots pressure data to work.
9. The utility model provides an intelligent terminal which characterized in that: comprising a memory and a processor, said memory having stored thereon a computer program which can be loaded by the processor and which performs the method of any of claims 1 to 7.
10. A computer-readable storage medium characterized by: further comprising: a computer program which can be loaded by a processor and which executes a method according to any one of claims 1 to 7.
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| CN113374693B (en) | 2023-06-20 |
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Denomination of invention: Control method, system, terminal, and storage medium for Roots screw pump unit Effective date of registration: 20230724 Granted publication date: 20230620 Pledgee: Industrial and Commercial Bank of China Limited Linhai Branch Pledgor: Zhejiang kelexi Power Equipment Co.,Ltd. Registration number: Y2023980049550 |