CN106382212A - Pics vacuum pump pressure stabilizing system - Google Patents
Pics vacuum pump pressure stabilizing system Download PDFInfo
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- CN106382212A CN106382212A CN201510463188.8A CN201510463188A CN106382212A CN 106382212 A CN106382212 A CN 106382212A CN 201510463188 A CN201510463188 A CN 201510463188A CN 106382212 A CN106382212 A CN 106382212A
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Abstract
The invention relates to a PICS vacuum pump pressure stabilizing system. The PICS vacuum pump pressure stabilizing system comprises a remote-transmission vacuum pressure module, a frequency converter, a PLC and an upper computer. The upper computer is connected with the PLC; the PLC is connected with the frequency converter and the remote-transmission vacuum pressure module; and the frequency converter is connected with a vacuum pump motor to control the vacuum pump motor to be started and stopped and adjust operation output power. The remote-transmission vacuum pressure module is mounted at the site of the vacuum system, collects pressure signals of vacuum pipes at the site of the vacuum system, converts the pressure signals into current signals with pressure values being linear and transmits the current signals to the PLC. Through the pressure closed-loop control technology and according to processing of comparison between required vacuum pressure and the collected pressure signals, the PLC makes vacuum pump aerogenesis pressure be matched with rotating speed of the vacuum pump motor within the dynamic range automatically for adjustment. By means of the PICS vacuum pump pressure stabilizing system, the vacuum system can operate stably, and system energy consumption can be lowered by 30% or above.
Description
Technical field
The invention belongs to vacuum pump system control technology field is and in particular to PICS vacuum pump voltage-stabilizing system.
Background technology
There is problems with most of paper plants vacuum pump system operating mode at present：
1st, mair motor star delta control, soft or from Rhizoma Nelumbinis reduced-voltage starting, electric current during starting is still very big, can affect the operation safety of the stable and other electrical equipment of electrical network.
2nd, motor full speed running, has no idea to adjust, and belongs to non-economy and runs, waste of energy is serious.
3rd, during mair motor power frequency operation, characteristic is hard, noise is very big.The impact of power frequency starting equipment is big, and equipment is fragile.
Even if the vacuum pump of 4 minority enterprises is mounted with energy saving frequency converter, due to using non-dedicated converter and control mode imperfection, not realizing closed loop control, cause vacuum pressure unstable, energy-saving effect is not good enough, in process of production unfavorable operation and easily cause technique spare unit descend machine in advance.
Existing like product on market --- turbine blower fan, is a kind of high-speed equipment stablizing vacuum by variable frequency adjustment, and such equipment investment is big, and the transformation cycle is long, energy-saving effect 10% about.Vacuum vacuum system pressure oscillation is stablized greatly using this equipment, and vacuum system is equipped with heavy-duty motor, system energy consumption is high.
Content of the invention
It is an object of the invention to solving above-mentioned technical problem and providing the energy-conservation voltage stabilizing vacuum system of a kind of vacuum pressure realizing vacuum pump by pressure closed loop control technology and converter and vaccum pump motor speed dynamic match control.
For achieving the above object, the present invention adopts the following technical scheme that：
PICS vacuum pump voltage-stabilizing system, including teletransmission vacuum pressure module, converter, PLC and host computer；Described host computer is connected with described PLC, described PLC is monitored, and realize carrying out operational control to described PLC, described PLC is connected with described converter, described teletransmission vacuum pressure module, and described converter connects vaccum pump motor and controls the start and stop of described vaccum pump motor and operating output to adjust；Described teletransmission vacuum pressure module is arranged on vacuum system scene, pressure signal for gathering vacuum system scene vacuum pipe is converted into the current signal linear with pressure value, and it is sent to described PLC, described PLC passes through pressure closed loop control technology, vacuum pressure according to needed for vacuum system scene and the pressure signal of collection carry out contrast process, then give described converter and run hertz numerical value, control described vaccum pump motor output according to actual needs, vacuum pump aerogenesis pressure and vaccum pump motor rotating speed Auto-matching in dynamic range is made to adjust.
Described teletransmission vacuum pressure module includes localizer formula sensor and pressure indicator.
Described host computer adopts touch screen controller.
The touch screen of described touch screen controller can be used for the control of the setting of vacuum control parameter, the startup of vacuum pump and stopping of vacuum pump, the selection of the automatic control mode of vacuum pump；Described vacuum control parameter includes the setting of vacuum degree of vacuum pump and the setting of the velocity of rotation of vaccum pump motor, and described touch screen also can show the vacuum degree of vacuum pump of actual measurement and the velocity of rotation of vaccum pump motor in real time.
Described touch screen can be additionally used in the setting of the pid control parameter of vacuum pump, and include PID arithmetic cycle, the proportionality coefficient of PID control, the integral coefficient of PID control, the differential coefficient of PID control and do not carry out the dead band value of PID regulation is manually entered setting.
Described teletransmission vacuum pressure module is installed on the vacuum pipe of vacuum pump.
Described PLC adopts Siemens s7300 or s7200 series processors institute, and described converter adopts Reynolds that converter.
The present invention passes through in vacuum system in-site installation vacuum teletransmission modular pressure, plc controller is sent to by the pressure signal of collection in worksite, system carries out contrast process according to required vacuum pressure with collection signal, then give vacuum system converter and run hertz numerical value, make system stable operation, the motor of system output according to actual needs, so that system energy consumption reduces by more than 30%；Compared with turbine blower fan, improvement cost of the present invention is cheap, is the 10% of same category of device；Energy-saving effect is more than 2 times of like product.
Brief description
Fig. 1 is the principle schematic of PICS vacuum pump voltage-stabilizing system provided in an embodiment of the present invention；
Fig. 2 provides the schematic diagram of the PICS vacuum pump voltage-stabilizing system controlling multiple stage vacuum pump for the embodiment of the present invention；
Fig. 3 is the schematic diagram of the main display picture after host computer start provided in an embodiment of the present invention；
Fig. 4 is No. three vacuum pump control interface schematic diagrams of host computer provided in an embodiment of the present invention；
Fig. 5 is the display picture schematic diagram of system vacuum angle value under the multiple stage vacuum pump of host computer；
Fig. 6 is the schematic diagram of the parameter setting display picture of PC control parameter setting.
Specific embodiment
Below, in conjunction with example, the substantive distinguishing features of the present invention and advantage are further described, but the invention is not limited in listed embodiment.
The present invention is by the vacuum pipe installation teletransmission pressure vacuum gauge to the vacuum pump in vacuum system, for detecting the vacuum of each vacuum pump, and collection signal is uploaded to PLC processor, converter installed by the motor of vacuum pump, adjust the rotating speed of motor according to the instruction that the cpu of PLC processor issues, to realize the constant of vacuum system.
Shown in Figure 1, PICS vacuum pump voltage-stabilizing system, including teletransmission vacuum pressure module, converter, PLC and host computer；Described host computer is connected with described PLC, described PLC is monitored, and realize carrying out operational control to described PLC, described PLC is connected with described converter, described teletransmission vacuum pressure module, and described converter connects vaccum pump motor and controls the start and stop of described vaccum pump motor and operating output to adjust；Described teletransmission vacuum pressure module is arranged on vacuum system scene, pressure signal for gathering vacuum system scene vacuum pipe is converted into the current signal linear with pressure value, and it is sent to described PLC, described PLC passes through pressure closed loop control technology, vacuum pressure according to needed for vacuum system scene and the pressure signal of collection carry out contrast process, then give described converter and run hertz numerical value, control described vaccum pump motor output according to actual needs, vacuum pump aerogenesis pressure and vaccum pump motor rotating speed Auto-matching in dynamic range is made to adjust.
It should be noted that, described teletransmission vacuum pressure module includes localizer formula sensor and pressure indicator, the pressure signal that described localizer formula sensor is mainly used in gathering vacuum system scene vacuum pipe is converted into the current signal linear with pressure value and is sent to described PLC processing, described pressure indicator is used for display current vacuum pressure data directly perceived, indicate pressure on the spot simultaneously, be easy to site technique inspection.
Teletransmission vacuum-pressure detection module of the present invention adopts ordinarily manometer contour structures, for online pressure measuring instruments, in addition to indicating pressure value on the spot, 4 ~ 20mA the electric current linear with pressure value can also continuously be exported, it is corrosion-resistant that it is shatter-proof, stable output signal, high precision, fully meet various environment and use.Measurement range -100-0（kPa）, accuracy class:0.02；Built-in control software can in good time to the zero point of instrument, linear, temperature drift is modified it is ensured that instrument accuracy interior for a long time.The shell of integral Al-alloy digital control processing, firm shock resistance, high mechanical strength.
When measuring the pressure of gas, the localizer formula sensor installed by gauge internal is measured and changes into standard signal and reaches away from the system of measurement point, to realize centralized detecting and remotely-controlled purpose the teletransmission vacuum-pressure detection module of the present invention.
When being embodied as，Described vacuum pump can be multiple stage，It is 1# pump as shown in Figure 2，2# pump，3# pump，4# pump etc.，Of course，Control the consistent multiple stage of the motor respective amount of described vacuum pump，It is 1# motor as shown in Figure 2，2# motor，3# motor，4# motor etc.，One vaccum pump motor controls a vacuum pump，And VFC is realized by the consistent multiple stage converter of corresponding quantity，It is 1# converter as shown in Figure 2，2# converter，3# converter，4# converter etc.，And realize the detection to vacuum pressure by multiple teletransmission vacuum pressure modules，Control with described PLC respectively，The plurality of converter connects a described PLC，Described PLC connects described host computer to realize，As shown in Figure 2，Include four teletransmission vacuum pressure modules P1、P2、P3 、P4，Control with described PLC respectively，The vacuum pressure that each vacuum pump at corresponding real-time detection vacuum system scene produces uploads to described PLC.Of course, the invention is not limited in the control of four vacuum pumps or more, or less, particular number does not limit.
Implement, described host computer adopts touch screen controller.Described touch screen controller is connected with described PLC, described PLC is monitored, and realize carrying out operational control to described PLC, can realize inputting control instruction, input various control parameters with control status, and show the various data of the actual operating mode of present system in real time, thus the convenient running status to present system is monitored, shown in Figure 3, the touch key-press of multiple stage vacuum pump is shown on this key frame, show that the page carries out display or the setting of the running parameter of this vacuum pump by the parameter touching the vacuum pump that corresponding button can enter corresponding numbering, and by the touch key-press of system condition, enter the data displaying picture of system condition.
Referring to shown in Fig. 4-5, wherein, the touch screen of described touch screen controller can be used for the control of the setting of vacuum control parameter, the startup of each vacuum pump and stopping of each vacuum pump, the selection of the automatic control mode of each vacuum pump；Described vacuum control parameter includes the setting of vacuum degree of vacuum pump and the setting of the velocity of rotation of vaccum pump motor, and described touch screen also can show the vacuum degree of vacuum pump of actual measurement and the velocity of rotation of vaccum pump motor in real time.Specifically when arranging this vacuum parameter, enter the parameter display interface of corresponding vacuum pump, you can realize the setting of corresponding vacuum parameters.
During use, open the total power switch of PLC, wait PLC and touch screen controller system start-up to terminate, initial start-up can arrange the rotating speed of vaccum pump motor manually, treats that vacuum reaches system requirements, can switch automatic mode.
Further, shown in Figure 6, described touch screen can be additionally used in the setting of the pid control parameter of each vacuum pump, include PID arithmetic cycle, the proportionality coefficient of PID control, the integral coefficient of PID control, the differential coefficient of PID control and do not carry out the dead band value of PID regulation is manually entered setting, and for revising setting of the side-play amount of initial value of transmitter etc..
When needing to change control parameter, after " parameter setting " button on point touching screen, a window requirement input administrator's password can be ejected, after inputting correct password, parameter setting picture could be entered, then click on the numeric field of each control parameter it is possible to modification arranges corresponding control parameter.
During concrete installation, described teletransmission vacuum pressure module is installed on the vacuum pipe of vacuum pump.
Described PLC adopts Siemens s7300 or s7200 series processors institute, and described converter adopts Reynolds that converter.
The control system that automatically controls of the present invention is arranged in frequency conversion tank, and converter is arranged in wall-mounted control cabinet.All cablings controlling cables and special converter feed cable and motor connection cable must mutually isolated it is impossible to put them in same cable trunking or on cable trough.
The protection of electromagnetic interference (EMI):
1st, be sure of all devices in control and monitor console all with short and thick earth cable reliably grounded to publicly star earth point or publicly earth bus.
2nd, it is directly connected to the ground terminal of the converter controlling this motor by the earth lead that motor returns（PE）On.
3rd, the contact of catalyst is preferably flat, because their impedances in high frequency are relatively low.
4th, block cable termination when as neat as possible it is ensured that the line segment without shielding is as short as possible.
5th, control the wiring of cable far as possible from power cable, using single trough；When intersecting with power line, 90 degree of crossing at right angles are taken in phase mutual induction.
6 and the connecting line of control loop all should adopt shielded cable.
7th, the cable of motor to special converter adopts shielded cable as far as possible.
Implement, automatic control system of the present invention should be installed on the space that heat-dissipating space is big and is dried, control detection screen should be put in the scene of convenient operation.
Described PLC type selecting can determine according to motor general power size.
Present system has following features：
1st, fluctuation vacuum scope：Positive and negative 0.01MPa；
2nd, vacuum is not less than existing level；
3rd, amount of electricity saving 20%-40%.
Present system completes control function by being used as master control unit using most advanced Siemens series of PLC, by the use of teletransmission vacuum detecting module as sensor, Reynolds that transducer drive vacuum pump is as executor, touch screen controller operates the action of PLC as ipc monitor, to control vaccum pump unit, its Main Function is to stablize vacuum, meet production system normal in the case of, saves energy to greatest extent.Its main control parameters is vacuum and electric current, frequency.Adopt uneoupled control mode for obtaining stable vacuum, this control mode uses advanced algorithm, release the association impact of each series connection vacuum pump, stablized, lasting good control effect.
The present invention passes through using described teletransmission vacuum-pressure detection module, for Measuring Vacuum outlet pressure, becomes standard signal, is sent in the analog input module of PLC.Analog input module is converted to digital quantity voltage signal, is input in the CPU module of PLC.The vacuum that the CPU of PLC sets user and the vacuum measuring are compared, again through decoupling computation, finally by analog output module outputting standard signal, deliver to corresponding Frequency Converter Control vaccum pump motor respectively and operate at the appropriate speed, make vacuum reach sets requirement.
Because vacuum pump is in actual production, due to can there is change with rate of air sucked in required, equipment does not run under fixing operating mode, and the height of equipment aerogenesis pressure then directly influences the size of actual power, and suction pressure is higher, and required power is also bigger.Change for satisfaction rate of air sucked in required requires, and will carry out suitable regulation, be typically designed surplus larger, so equipment aerogenesis will be more than gas consumption.
The present invention passes through Frequency Conversion Modification and can run under the pressure required for ensureing to produce, power input to machine is greatly reduced, and is aided with pressure closed loop control, realizes the Dynamic Matching of equipment aerogenesis pressure rotating speed, that reduces motor actually enters power, thus reaching the purpose of energy-conservation.And pressure stability improves, and pressure can stageless setting, adjustable at any time, soft start realized by motor, increases service life and the time between overhauls(TBO) of equipment.
Vacuum system of the present invention, for realizing vacuum regulation using ventilative machine, has the advantages that under hinge structure：
（1）Cancel and use Valve controlling pressure regulative mode, to avoid the waste of energy thus leading to.System adjusts the rotating speed of motor according to actual needs to adjust pressure, makes the power that motor exports substantially proportional with traffic demand, so that motor efficiency operation, to reach obvious power savings.
（2）Using the energy saver mode of special converter, motor can be made to run with peak efficiency in underloading, reduce unnecessary electric energy loss；
（3）Electric current when can make electric motor starting, load gently rises, and does not have any impact；Motor can be made to realize soft stop, it is to avoid instead give birth to the harm that electric current causes, be conducive to the service life of extension device；Avoid the fine of Utilities Electric Co. brought because of current peak；
（4）After accuracy-control system, the pressure of the gas in pipeline with the pressure of gas in real-time monitoring vacuum line, can be made to keep constant, improve production efficiency and product quality；
（5）Motor runs at a high state of efficiency, and power factor is higher, reduces reactive loss, has saved a large amount of electric energy.
According in actual production, so that one is equipped with the 50 type water ring vacuum pumps as 220kw for the power as a example, the change of electric current and power consumption before and after this scrap build is carried out statistical analysiss, find using after energy-conservation voltage-stabilization control system, 20～40% electric energy not only can be saved, extend the service life of vacuum pump, and improve stablizing of vacuum, production is stablized and product quality makes moderate progress.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; some improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (7)
1.PICS vacuum pump voltage-stabilizing system is it is characterised in that include teletransmission vacuum pressure module, converter, PLC and host computer；Described host computer is connected with described PLC, described PLC is monitored, and realize carrying out operational control to described PLC, described PLC is connected with described converter, described teletransmission vacuum pressure module, and described converter connects vaccum pump motor and controls the start and stop of described vaccum pump motor and operating output to adjust；Described teletransmission vacuum pressure module is arranged on vacuum system scene, pressure signal for gathering vacuum system scene vacuum pipe is converted into the current signal linear with pressure value, and it is sent to described PLC, described PLC passes through pressure closed loop control technology, vacuum pressure according to needed for vacuum system scene and the pressure signal of collection carry out contrast process, then give described converter and run hertz numerical value, control described vaccum pump motor output according to actual needs, vacuum pump aerogenesis pressure and vaccum pump motor rotating speed Auto-matching in dynamic range is made to adjust.
2. according to claim 1 PICS vacuum pump voltage-stabilizing system it is characterised in that described teletransmission vacuum pressure module includes localizer formula sensor and pressure indicator.
3. according to claim 2 PICS vacuum pump voltage-stabilizing system it is characterised in that described host computer adopts touch screen controller.
4. according to claim 3 PICS vacuum pump voltage-stabilizing system it is characterised in that the touch screen of described touch screen controller can be used for the control of the setting of vacuum control parameter, the startup of vacuum pump and stopping of vacuum pump, the selection of the automatic control mode of vacuum pump；Described vacuum control parameter includes the setting of vacuum degree of vacuum pump and the setting of the velocity of rotation of vaccum pump motor；Described touch screen also can show the vacuum degree of vacuum pump of actual measurement and the velocity of rotation of vaccum pump motor in real time.
5. PICS vacuum pump voltage-stabilizing system according to claim 4, it is characterized in that, described touch screen can be additionally used in the setting of the pid control parameter of vacuum pump, and include PID arithmetic cycle, the proportionality coefficient of PID control, the integral coefficient of PID control, the differential coefficient of PID control and do not carry out the dead band value of PID regulation is manually entered setting.
6. according to claim 5 PICS vacuum pump voltage-stabilizing system it is characterised in that described teletransmission vacuum pressure module is installed on the vacuum pipe of vacuum pump.
7. according to any one of claim 1 ~ 6 PICS vacuum pump voltage-stabilizing system it is characterised in that described PLC adopts Siemens s7300 or s7200 series processors institute, described converter adopts your converter of Reynolds.
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| CN201510463188.8A CN106382212A (en) | 2015-08-02 | 2015-08-02 | Pics vacuum pump pressure stabilizing system |
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| CN201510463188.8A CN106382212A (en) | 2015-08-02 | 2015-08-02 | Pics vacuum pump pressure stabilizing system |
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Cited By (8)
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| CN108330727A (en) * | 2018-01-19 | 2018-07-27 | 泰州新源电工器材有限公司 | A kind of vacuum-control(led) system and paper machine for paper machine |
| CN109143958A (en) * | 2018-08-27 | 2019-01-04 | 上海大松瓦楞辊有限公司 | A kind of control system of corrugated paper machine |
| CN109327165A (en) * | 2018-10-30 | 2019-02-12 | 格力电器（武汉）有限公司 | A kind of control system, method and Centralized Controller |
| CN109521816A (en) * | 2018-12-28 | 2019-03-26 | 广州市公用事业高级技工学校(广州市公用事业技师学院、广州市公用事业高级职业技术培训学院) | Vacuum degree method of adjustment, system, device, computer equipment and storage medium |
| CN110456751A (en) * | 2019-08-16 | 2019-11-15 | 建龙北满特殊钢有限责任公司 | A kind of pneumatic steelmaking control system |
| CN110524602A (en) * | 2018-05-23 | 2019-12-03 | 拓卡奔马机电科技有限公司 | Vacuum systems stabilisation and its antihunt means and device applied to cutting |
| CN112443486A (en) * | 2020-10-28 | 2021-03-05 | 江苏大学镇江流体工程装备技术研究院 | Device for automatically stabilizing vacuum degree |
| CN114043703A (en) * | 2021-11-02 | 2022-02-15 | 北京动力源创科技发展有限公司 | Control system for automatic vacuumizing of extruder |
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| CN110524602A (en) * | 2018-05-23 | 2019-12-03 | 拓卡奔马机电科技有限公司 | Vacuum systems stabilisation and its antihunt means and device applied to cutting |
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| CN110456751A (en) * | 2019-08-16 | 2019-11-15 | 建龙北满特殊钢有限责任公司 | A kind of pneumatic steelmaking control system |
| CN112443486A (en) * | 2020-10-28 | 2021-03-05 | 江苏大学镇江流体工程装备技术研究院 | Device for automatically stabilizing vacuum degree |
| CN114043703A (en) * | 2021-11-02 | 2022-02-15 | 北京动力源创科技发展有限公司 | Control system for automatic vacuumizing of extruder |
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