Pressure stability control method and system for air compressor set main pipe
阅读说明：本技术 一种空气压缩机组母管压力稳定性控制方法及其系统 (Pressure stability control method and system for air compressor set main pipe ) 是由 吕玉凤 马聪孝 李鑫房 王建腾 李桐 张红娟 冯川 孟姿 尚昆 郭逍遥 艾珂 于 2021-09-08 设计创作，主要内容包括：本发明提供了一种空气压缩机组母管压力稳定性控制方法及其系统,属于烟草生产设备自动控制技术领域,应用于包括设置于加工现场的多台空压机,用于检测母管出气流量和压力值的传感器,控制和/或获得多台所述空压机的运行状态和/或输出压力实际值的中央控制器,以及控制多台所述空压机手动或自动模式的上位机,且,所述传感器与所述中央控制器通信连接,多台所述空压机的输出端连接一根所述母管,所述控制方法包括：S1,通过所述中央控制器获得各所述空压机的运行状态和输出压力实际值,以及所述母管的出气流量和压力值；本发明具有能够保证为卷烟车间提供稳定的空压气体,避免人为失误,并能够起到增强卷烟工艺的稳定性与降低次品率的作用。(The invention provides a method and a system for controlling pressure stability of a main pipe of an air compressor set, which belong to the technical field of automatic control of tobacco production equipment, and are applied to a plurality of air compressors arranged on a processing site, a sensor for detecting the air outlet flow and the pressure value of the main pipe, a central controller for controlling and/or obtaining the running states and/or the actual output pressure values of the plurality of air compressors, and an upper computer for controlling the manual or automatic mode of the plurality of air compressors, wherein the sensor is in communication connection with the central controller, the output ends of the plurality of air compressors are connected with one main pipe, and the control method comprises the following steps: s1, obtaining the running state and the actual output pressure value of each air compressor and the air outlet flow and pressure value of the main pipe through the central controller; the invention can ensure that stable air pressure gas is provided for a cigarette workshop, avoid human errors and play a role in enhancing the stability of the cigarette process and reducing the defective rate.)
1. The method for controlling the pressure stability of the main pipe of the air compressor unit is characterized by comprising a plurality of air compressors arranged on a processing site, a sensor for detecting the air outlet flow and the pressure value of the main pipe, a central controller for controlling and/or obtaining the running states and/or the actual output pressure values of the plurality of air compressors, and an upper computer for controlling the plurality of air compressors in a manual or automatic mode, wherein the sensor is in communication connection with the central controller, the output ends of the plurality of air compressors are connected with one main pipe, and the control method comprises the following steps:
s1, obtaining the running state and the actual output pressure value of each air compressor and the air outlet flow and pressure value of the main pipe through the central controller;
s2, determining the number of the first type air compressors and the second type air compressors to be started according to the total number of the air compressors, the magnitude of the air outlet flow and the air supply capacity of each air compressor;
s3, determining the number of the air compressors to be started according to the number of the first type air compressors and the second type air compressors and the running state;
s4, sending an instruction to the central controller according to the serial number of the air compressor to be started and the change condition to control the start and stop of the corresponding air compressor, and adjusting the actual value of the output pressure of the second type of air compressor in the air compressors to be started;
and S5, monitoring the outlet flow of the main pipe, and adjusting the running state of the air machine and the actual value of the output pressure to ensure the pressure of the main pipe to be stable.
2. The method of claim 1, wherein the operating condition comprises a manual or automatic mode, an operating or a stopped condition, and the sensor comprises a flow sensor and a pressure sensor.
3. The method for controlling the pressure stability of the bus bar of the air compressor set according to claim 1, wherein the determining the number of the first type air compressors and the second type air compressors to be started according to the total number of the air compressors, the magnitude of the outlet air flow and the air supply capacity of each air compressor specifically comprises:
s21, determining the number of the air compressors to be started according to the total number of the air compressors, the magnitude of the air outlet flow and the air supply capacity of each air compressor;
and S22, determining the number of the first type air compressors and the second type air compressors according to the number of the air compressors needing to be started and the variation ranges of the first type air compressors, the second type air compressors and the air outlet flow.
4. The method for controlling the pressure stability of the busbar of the air compressor set according to claim 3, wherein the method for determining the number of the air compressors to be started comprises the following steps:
in the formula, alpha represents the quantity of the air compressors needing to be started;
s represents the total number of the air compressors;
co represents the outlet gas flow of the main pipe;
and C represents the air supply capacity of the air compressor.
5. The method of claim 3, wherein the variation range of the outlet flow is δ -Comax-COmin；
In the formula, COmaxRepresents the maximum value of the outlet air flow of the main pipe;
COminrepresenting the minimum value of the outlet flow of the main pipe.
6. The method for controlling the pressure stability of the bus bar of the air compressor set according to claim 5, wherein the method for determining the number of the first type of air compressor and the second type of air compressor is as follows:
setting the first type air compressor and the second type air compressor as an x platform and a y platform respectively;
if delta < Cn minThen y is 1, x is α -y;
if it isThen x is 1, y is α -x;
in the formula, Cn minShows the air supply capacity C of the air compressor1，C2，C3+…+CnMinimum value of (1);
Cn maxshows the air supply capacity C of the air compressor1，C2，C3+…+CnMaximum value of (2).
7. The method for controlling the pressure stability of the bus bar of the air compressor set according to claim 1, wherein the determining of the number of the air compressors to be started according to the number of the first type air compressors and the second type air compressors and the operation state specifically comprises:
s31, determining the number of the started first type air compressor, the number of the started second type air compressor, the number of the un-started first type air compressor and the number of the un-started second type air compressor according to the operation state;
and S32, determining the number of the air compressors to be started according to the number of the air compressors of the first type and the number of the air compressors of the second type.
8. The method for controlling the pressure stability of the busbar of the air compressor set according to claim 1, wherein the method for adjusting the actual value of the output pressure of the second type of air compressor to be started is as follows:
in the formula: p is a radical ofyThe method comprises the steps of representing actual output pressure values of y second type air compressors in the air compressors to be started;
p represents the pressure value of the mother tube.
9. The method for controlling pressure stability of the main pipe of the air compressor set according to claim 1, wherein the monitoring of the magnitude of the outlet flow of the main pipe and the adjustment of the operation state of the air machine and the actual value of the output pressure are performed to ensure that the pressure of the main pipe is stable, specifically comprising:
s51, monitoring the outlet flow of the main pipe, and if the outlet flow of the main pipe is too large, sending an instruction to the central controller to control the running air compressor to be in full-load running;
s52, if the air compressor that is running is unbalanced in load, the air compressor that is running is adjusted by sending instructions to the upper computer and is in a manual mode, the pressure of the air compressor that is running is manually set by an operator, and the air compressor that is running is adjusted by sending instructions to the upper computer after the air compressor that is running is balanced in load and is in an automatic mode.
10. An air compressor set main pipe pressure stability control system is applied to the air compressor set main pipe pressure stability control method of any one of claims 1 to 9, and is characterized by being applied to a plurality of air compressors arranged in a processing site, a sensor for detecting the outlet air flow and the pressure value of a main pipe, a central controller for controlling and/or obtaining the running states and/or the actual output pressure values of the air compressors, and an upper computer for controlling the manual or automatic modes of the air compressors, wherein the sensor is in communication connection with the central controller, the output ends of the air compressors are connected with one main pipe, and the control system comprises:
the obtaining module is used for obtaining the running state and the actual output pressure value of each air compressor and the air outlet flow and the pressure value of the main pipe through the central controller;
the first determining module is used for determining the number of the first type air compressors and the second type air compressors to be started according to the total number of the air compressors, the size of the air outlet flow and the air supply capacity of each air compressor;
the second determining module is used for determining the number of the air compressors to be started according to the number of the first type air compressors and the second type air compressors and the running state;
the output module is used for sending an instruction to the central controller to control the start and stop of the corresponding air compressor according to the serial number of the air compressor to be started and the change condition, and adjusting the actual value of the output pressure of the second type of air compressor in the air compressor to be started;
and the auxiliary monitoring module is used for monitoring the air outlet flow of the main pipe and adjusting the running state of the air machine and the actual value of the output pressure so as to ensure the pressure stability of the main pipe.
Technical Field
The invention belongs to the technical field of automatic control of tobacco production equipment, and particularly relates to a method and a system for controlling the pressure stability of a main pipe of an air compressor set.
Background
The air compressors are divided into screw air compressors and centrifugal air compressors, and the set pressure value of the screw air compressors can be manually adjusted according to the flow, so that the air output of the screw air compressors can be adjusted. After the centrifugal air compressor is put into production, the centrifugal air compressor works at rated load and cannot be manually adjusted. The operating principle of the air compressor is roughly as follows: air enters the compressor from the air inlet valve through the air filter, and is compressed through the male rotor and the female rotor after entering the air compressor. In the compression cavity, the rotor is sprayed with oil, so that the functions of lubrication, cooling and sealing are achieved. And (3) the compressed high-pressure high-temperature oil-containing gas enters an oil-gas separation barrel, and the compressed air is discharged out of the air compressor through an air cooler after oil-gas separation. And the lubricating oil enters the oil cooler under the action of positive pressure in the oil-gas separator, reenters the compressor under the action of the temperature control valve, and a part of lubricating oil directly enters a compression cavity of the compressor through the oil return pipe in a repeated way.
The air pressure gas produced by the tobacco air pressure system firstly enters a main air storage tank and then enters an air pressure cylinder, and the air pressure cylinder provides the air pressure gas for a production workshop. The functions of the air pressure of the tobacco system mainly comprise: pneumatic valve control, essence and spice materialization, air cylinder driving and the like are carried out by using air pressure in a silk making workshop; the air pressure is used in the rolling workshop to transmit the air cylinder, automatically clean the drum wheel, remove the cigarette and cigarette packet, separate the stem and cut tobacco by winnowing, shape the cut tobacco and so on. Thus, the stability of the supply of air under pressure is of great significance to the overall cigarette manufacturing process.
However, the flow rate of the air compression main pipe is constantly in a fluctuation state, so that the pressure of the air compression main pipe is in a fluctuation state which is neglected, the air compression station generally comprises two persons, and the two persons are matched to complete the management of the field equipment and ensure that the pressure of the air compression main pipe meets the requirements of the process indexes. Because the pressure of the air compression main pipe needs to be adjusted frequently, the manual operation is frequent, the working pressure is tense, and the working labor intensity is high. In addition, the pressure adjustment is adjusted according to experience in a manual mode, the adjustment modes are different, the pressure change range of the air compression main pipe is large, and the requirements on the cigarette technology and the energy conservation and consumption reduction are all bad.
Disclosure of Invention
The embodiment of the invention provides a method and a system for controlling the pressure stability of a main pipe of an air compressor unit, and aims to solve the problems that the pressure of the air compressor unit of the existing cigarette factory needs to be frequently adjusted, the manual operation is frequent, the working pressure is intense, the working labor intensity is high, and the pressure adjustment is adjusted according to experience in a manual mode, so that the pressure change range of the air compressor main pipe is large.
In view of the above problems, the technical solution proposed by the present invention is:
a pressure stability control method for a main pipe of an air compressor unit is applied to a plurality of air compressors arranged in a processing site, a sensor for detecting the air outlet flow and the pressure value of the main pipe, a central controller for controlling and/or obtaining the running state and/or the actual output pressure value of the plurality of air compressors, and an upper computer for controlling the plurality of air compressors in a manual or automatic mode, wherein the sensor is in communication connection with the central controller, the output ends of the plurality of air compressors are connected with one main pipe, and the control method comprises the following steps:
s1, obtaining the running state and the actual output pressure value of each air compressor and the air outlet flow and pressure value of the main pipe through the central controller;
s2, determining the number of the first type air compressors and the second type air compressors to be started according to the total number of the air compressors, the magnitude of the air outlet flow and the air supply capacity of each air compressor;
s3, determining the number of the air compressors to be started according to the number of the first type air compressors and the second type air compressors and the running state;
s4, sending an instruction to the central controller according to the serial number of the air compressor to be started and the change condition to control the start and stop of the corresponding air compressor, and adjusting the actual value of the output pressure of the second type of air compressor in the air compressors to be started;
and S5, monitoring the outlet flow of the main pipe, and adjusting the running state of the air machine and the actual value of the output pressure to ensure the pressure of the main pipe to be stable.
As a preferred embodiment of the present invention, the operation state includes a manual or automatic mode, an operation or stop state, and the sensor includes a flow sensor and a pressure sensor.
As a preferred technical solution of the present invention, the determining the number of the first type air compressors and the second type air compressors to be started according to the total number of the air compressors, the magnitude of the outlet air flow, and the air supply capacity of each of the air compressors specifically includes:
s21, determining the number of the air compressors to be started according to the total number of the air compressors, the magnitude of the air outlet flow and the air supply capacity of each air compressor;
and S22, determining the number of the first type air compressors and the second type air compressors according to the number of the air compressors needing to be started and the variation ranges of the first type air compressors, the second type air compressors and the air outlet flow.
As a preferred technical solution of the present invention, the method for determining the number of the air compressors to be started comprises:
in the formula, alpha represents the quantity of the air compressors needing to be started;
s represents the total number of the air compressors;
co represents the outlet gas flow of the main pipe;
and C represents the air supply capacity of the air compressor.
As a preferred embodiment of the present invention, the variation range of the outlet flow is δ ═ Comax-COmin；
In the formula, ComaxRepresents the maximum value of the outlet air flow of the main pipe;
COminrepresenting the minimum value of the outlet flow of the main pipe.
As a preferred technical solution of the present invention, the method for determining the number of the first type air compressors and the second type air compressors includes:
setting the first type air compressor and the second type air compressor as an x platform and a y platform respectively;
if delta < Cn minThen y is 1, x is α -y;
if it isThen x is 1, y is α -x;
in the formula, Cn minShows the air supply capacity C of the air compressor1，C2，C3+…+CnMinimum value of (1);
Cn maxshows the air supply capacity C of the air compressor1，C2，C3+…+CnMaximum value of (2).
As a preferred technical solution of the present invention, the determining, according to the number of the first type air compressors and the second type air compressors and the operating state, the number of the air compressors to be started specifically includes:
s31, determining the number of the started first type air compressor, the number of the started second type air compressor, the number of the un-started first type air compressor and the number of the un-started second type air compressor according to the operation state;
and S32, determining the number of the air compressors to be started according to the number of the air compressors of the first type and the number of the air compressors of the second type.
As a preferred technical solution of the present invention, the method for adjusting the actual value of the output pressure of the second type of air compressor of the air compressors to be started comprises:
in the formula: p is a radical ofyThe method comprises the steps of representing actual output pressure values of y second type air compressors in the air compressors to be started;
p represents the pressure value of the mother tube.
As a preferred technical solution of the present invention, the monitoring the magnitude of the outlet flow of the main pipe, and adjusting the operating state of the air machine and the actual value of the output pressure to ensure that the pressure of the main pipe is stable specifically includes:
s51, monitoring the outlet flow of the main pipe, and if the outlet flow of the main pipe is too large, sending an instruction to the central controller to control the running air compressor to be in full-load running;
s52, if the air compressor that is running is unbalanced in load, the air compressor that is running is adjusted by sending instructions to the upper computer and is in a manual mode, the pressure of the air compressor that is running is manually set by an operator, and the air compressor that is running is adjusted by sending instructions to the upper computer after the air compressor that is running is balanced in load and is in an automatic mode.
In another aspect, the present invention further provides a system for controlling pressure stability of a main pipe of an air compressor set, which is applied to a plurality of air compressors disposed in a processing site, a sensor for detecting an outlet flow and a pressure value of the main pipe, a central controller for controlling and/or obtaining an operating state and/or an actual value of an output pressure of the plurality of air compressors, and an upper computer for controlling a manual or automatic mode of the plurality of air compressors, wherein the sensor is in communication connection with the central controller, and an output end of each of the plurality of air compressors is connected to one of the main pipes, the control system includes:
the obtaining module is used for obtaining the running state and the actual output pressure value of each air compressor and the air outlet flow and the pressure value of the main pipe through the central controller;
the first determining module is used for determining the number of the first type air compressors and the second type air compressors to be started according to the total number of the air compressors, the size of the air outlet flow and the air supply capacity of each air compressor;
the second determining module is used for determining the number of the air compressors to be started according to the number of the first type air compressors and the second type air compressors and the running state;
the output module is used for sending an instruction to the central controller to control the start and stop of the corresponding air compressor according to the serial number of the air compressor to be started and the change condition, and adjusting the actual value of the output pressure of the second type of air compressor in the air compressor to be started;
and the auxiliary monitoring module is used for monitoring the air outlet flow of the main pipe and adjusting the running state of the air machine and the actual value of the output pressure so as to ensure the pressure stability of the main pipe.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the change of the pressure and the air output of the main pipe, x first type air compressors are determined to be started, y second type air compressors are started in a matched mode, and the air output of the second type air compressors is adjusted in real time according to needs to guarantee stable pressure of the main pipe.
(2) After the pressure required by the process index is achieved, the set pressure of the second type air compressor is automatically adjusted in real time along with the flow change of the main pipe so as to adjust the pressure of the main pipe and achieve the effect that the pressure of the main pipe always meets the requirement of the process index; the invention can ensure that stable air pressure gas is provided for a cigarette workshop, reduce the damage to gas supply equipment, improve the utilization rate of energy, avoid human errors and play a role in enhancing the stability of the cigarette process and reducing the defective rate.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
FIG. 1 is a flow chart of a method for controlling pressure stability of a header of an air compressor package as disclosed herein;
fig. 2 is a schematic structural diagram of a pressure stability control system for a main pipe of an air compressor set disclosed in the present invention.
Description of reference numerals: 100. a central controller; 110. an air compressor; 120. a main pipe; 130. a sensor; 140. an upper computer; 200. obtaining a module; 300. a first determination module; 400. a second determination module; 500. an output module; 600. and an auxiliary monitoring module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example one
Referring to the attached drawing 1, the invention provides a technical scheme: a pressure stability control method for a main pipe of an air compressor unit is applied to a plurality of air compressors 110 arranged in a processing site, a sensor 130 used for detecting the air outlet flow and the pressure value of the main pipe 120, a central controller 100 used for controlling and/or obtaining the running state and/or the actual output pressure value of the plurality of air compressors 110, and an upper computer 140 used for controlling the plurality of air compressors 110 in a manual or automatic mode, wherein the sensor 130 is in communication connection with the central controller 100, the output ends of the plurality of air compressors 110 are connected with one main pipe 120, and the control method comprises the following steps:
s1, obtaining the operation state and the actual output pressure value of each air compressor 110, and the outlet flow and pressure value of the main pipe 120 through the central controller 100.
It is noted that the operational states include manual or automatic modes, run or stop states, and the sensors 130 include flow sensors and pressure sensors.
In the above steps, the plurality of air compressors 110 may form a set of air compressor units, each set of air compressor units corresponds to one main pipe 120, and each set of air compressor units includes X first-type air compressors and Y second-type air compressors; and detects the outlet flow rate and pressure value of the main pipe 120 using the sensor 130 and transmits the data to the central controller 100.
And S2, determining the number of the first type air compressors and the second type air compressors to be started according to the total number of the air compressors 110, the magnitude of the air outlet flow and the air supply capacity of each air compressor 110.
It should be noted that the first type of air compressor represents an air compressor with fixed outlet air pressure, and the second type of air compressor represents an air compressor with adjustable outlet air pressure.
Specifically, the determining the number of the first type air compressors and the second type air compressors to be started according to the total number of the air compressors 110, the size of the outlet air flow, and the air supply capacity of each air compressor 110 specifically includes:
and S21, determining the number of the air compressors 110 to be started according to the total number of the air compressors 110, the size of the air outlet flow and the air supply capacity of each air compressor 110.
And S22, determining the number of the first type air compressors and the second type air compressors according to the number of the air compressors 110 needing to be started and the variation ranges of the first type air compressors, the second type air compressors and the air outlet flow.
In a preferred embodiment of the present invention, the method for determining the number of the air compressors 110 to be started comprises:
in the formula, α represents the number of the air compressors 110 to be started;
s represents the total number of the air compressors 110;
co represents the outlet flow of the parent pipe 120;
c represents the air supply capacity of the air compressor 110.
In a preferred embodiment of the present invention, the variation range of the outlet flow is δ ═ Comax-COmin；
In the formula, ComaxRepresents the maximum value of the outlet flow of the parent pipe 120;
COminrepresenting the minimum value of the outlet flow of the parent pipe 120.
In a preferred embodiment of the present invention, the method for determining the number of the first type of air compressor and the second type of air compressor includes:
setting the first type air compressor and the second type air compressor as an x platform and a y platform respectively;
if delta < Cn minThen y is 1, x is α -y;
if it isThen x is 1, y is α -x;
in the formula, Cn minShows the air supply capacity C of the air compressor 1101，C2，C3+…+CnMinimum value of (1);
Cn maxshows the air supply capacity C of the air compressor 1101，C2，C3+…+CnMaximum value of (2).
And S3, determining the number of the air compressors 110 to be started according to the number of the first type air compressors and the second type air compressors and the running state.
Specifically, the determining the number of the air compressors 110 to be started according to the number of the first type air compressors and the second type air compressors and the operating state includes:
and S31, determining the number of the started first type air compressor, the number of the started second type air compressor, the number of the un-started first type air compressor and the number of the un-started second type air compressor according to the running state.
And S32, determining the number of the air compressors to be started according to the number of the air compressors of the first type and the number of the air compressors of the second type.
And S4, sending an instruction to the central controller 100 according to the number of the air compressors 110 to be started and the change condition to control the start and stop of the corresponding air compressors 110, and simultaneously adjusting the actual output pressure value of the second type of air compressor in the air compressors 110 to be started.
Wherein, the change condition is the magnitude of the outlet flow of the main pipe and the change rate of the pressure value.
Specifically, the method for adjusting the actual value of the output pressure of the second type of air compressor in the air compressors 110 to be started includes:
in the formula: p is a radical ofyOutput indicating that y second type air compressors of air compressors 110 need to be turned onAn actual value of pressure;
p represents the pressure value of the mother tube.
S5, monitoring the outlet flow rate of the main pipe 120, and adjusting the operation state of the air machine and the actual value of the output pressure to ensure the pressure of the main pipe 120 is stable.
Specifically, the monitoring of the outlet flow rate of the main pipe 120 and the adjusting of the operation state of the air machine and the actual value of the output pressure to ensure that the pressure of the main pipe 120 is stable specifically include:
s51, monitoring the outlet flow rate of the main pipe 120, and if the outlet flow rate of the main pipe 120 is too large, sending an instruction to the central controller 100 to control the running air compressor 110 to be in full-load operation;
s52, if the running air compressor 110 is unbalanced in load, the running air compressor 110 is adjusted to be in manual mode by sending an instruction to the upper computer 140, the pressure of the running air compressor 110 is manually set by an operator, and the running air compressor 110 is adjusted to be in automatic mode by sending an instruction to the upper computer 140 after the running air compressor 110 is balanced in load.
Example two
Referring to fig. 2, another embodiment of the present invention provides a system for controlling pressure stability of a main pipe 120 of an air compressor unit, which is applied to a plurality of air compressors 110 installed in a processing site, a sensor 130 for detecting an outlet flow and a pressure value of the main pipe 120, a central controller 100 for controlling and/or obtaining an operating state and/or an actual output pressure value of the plurality of air compressors 110, and an upper computer 140 for controlling the plurality of air compressors 110 in a manual or automatic mode, wherein the sensor 130 is in communication connection with the central controller 100, an output end of the plurality of air compressors 110 is connected to one main pipe 120, and the control system includes:
an obtaining module 200, where the obtaining module 200 is configured to obtain, through the central controller 100, an operation state and an actual output pressure value of each air compressor 110, and an outlet flow rate and a pressure value of the main pipe 120.
A first determining module 300, where the first determining module 300 is configured to determine the number of the first type air compressors and the second type air compressors to be started according to the total number of the air compressors 110, the magnitude of the outlet air flow, and the air supply capacity of each air compressor 110.
A second determining module 400, where the second determining module 400 is configured to determine a number of the air compressors 110 to be started according to the number of the first type air compressors and the second type air compressors and the operating state.
An output module 500, where the output module 500 is configured to send an instruction to the central controller 100 according to the serial number of the air compressor 110 to be started and according to a change condition to control start and stop of the corresponding air compressor 110, and adjust an actual value of output pressure of the second type of air compressor in the air compressors 110 to be started at the same time.
And the auxiliary monitoring module 600 is configured to monitor the magnitude of the outlet flow of the main pipe 120, and adjust the operation state of the air machine and the actual value of the output pressure to ensure that the pressure of the main pipe 120 is stable.
One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:
(1) according to the change of the pressure and the air output of the main pipe, x first type air compressors are determined to be started, y second type air compressors are started in a matched mode, and the air output of the second type air compressors is adjusted in real time according to needs to guarantee stable pressure of the main pipe.
(2) After the pressure required by the process index is achieved, the set pressure of the second type air compressor is automatically adjusted in real time along with the flow change of the main pipe so as to adjust the pressure of the main pipe and achieve the effect that the pressure of the main pipe always meets the requirement of the process index; the invention can ensure that stable air pressure gas is provided for a cigarette workshop, reduce the damage to gas supply equipment, improve the utilization rate of energy, avoid human errors and play a role in enhancing the stability of the cigarette process and reducing the defective rate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
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