CN113359603A - Vacuum jet siphon drainage equipment monitoring system based on PLC - Google Patents
Vacuum jet siphon drainage equipment monitoring system based on PLC Download PDFInfo
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- CN113359603A CN113359603A CN202110784923.0A CN202110784923A CN113359603A CN 113359603 A CN113359603 A CN 113359603A CN 202110784923 A CN202110784923 A CN 202110784923A CN 113359603 A CN113359603 A CN 113359603A
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Abstract
The invention discloses a vacuum jet siphon drainage equipment monitoring system based on a PLC (programmable logic controller), which comprises a vacuum jet siphon water taking system consisting of a submersible vacuum jet rectifier, a siphon pipe and a siphon pipe outlet regulating valve, a vacuum power system consisting of a vacuum pipe shut-off valve, a water ring vacuum pump, a buffer tank, a liquid-gas exchange tank and a water replenishing pump, and an automatic monitoring control system consisting of the PLC, a touch screen, a motor control relay, a flow signal sensor, a pressure signal sensor, a temperature signal sensor, a water level signal sensor, a motor comprehensive protector and a valve opening sensor, wherein the touch screen, the motor control relay, the flow signal sensor, the pressure signal sensor, the temperature signal sensor, the water level signal sensor, the motor comprehensive protector and the valve opening sensor are electrically connected with a motor of the water ring vacuum pump, and the PLC is electrically connected with the siphon pipe outlet regulating valve and the vacuum pipe shut-off valve. The siphon water pipe water delivery system is used for improving siphon pipe water delivery efficiency, realizes automatic operation and continuous controllability of the system, and has the characteristics of simple structure, reliable operation and higher integration level.
Description
Technical Field
The invention relates to the technical field of fluid monitoring control, in particular to a vacuum jet siphon drainage equipment monitoring system based on a PLC.
Background
Siphon, an ancient natural phenomenon, makes natural power such as flow field force, gravity, atmospheric pressure and the like become a natural power transmission source of water. At present, most water taking processes take pumping as a main conveying mode, have the defects of high energy consumption, easy cavitation water hammer, high maintenance cost, much influence from boundary conditions, low water pump efficiency and the like, and have a low intelligent level.
Vacuum jet siphon drainage is large-diameter, large-flow, quick and efficient water delivery technical equipment, breaks through key technologies such as vacuum siphon, diving rectification, drainage control and the like, and is integrated with industrial intelligent manufacturing to form a large-scale drainage mode crossing dam non-excavation. Compared with the traditional process, the method has the advantages of advanced technology, ecological environmental protection, cost saving, environmental protection, energy conservation, stable water taking, safe and reliable technology and the like, has high conformity with the ecological development concept and very wide market prospect, and the industrial intelligent level of vacuum jet siphon is continuously upgraded after years of development. With the development of sensor technology, computer technology and network communication technology, various single-chip microcomputers, programmable controllers and PC technology are widely applied to the field of fluid monitoring control, so that the intelligent control of vacuum jet siphon drainage becomes a development trend.
Disclosure of Invention
The invention aims to provide a vacuum jet siphon drainage equipment monitoring system based on a PLC (programmable logic controller), which is used for improving the water delivery efficiency of a siphon pipeline, realizing the automatic operation and continuous controllability of the system and has the characteristics of simple structure, reliable operation and higher integration level.
In order to achieve the purpose, the invention provides the following scheme:
a vacuum jet siphon drainage equipment monitoring system based on PLC comprises a vacuum jet siphon water taking system, a vacuum power system and an automatic monitoring control system, wherein the vacuum jet siphon water taking system comprises a submersible vacuum jet rectifier, a siphon and a siphon outlet regulating valve, the submersible vacuum jet rectifier is arranged in a water reservoir, the siphon is connected with the submersible vacuum jet rectifier, the siphon outlet regulating valve is arranged at an outlet of the siphon, the vacuum power system comprises a vacuum tube cut-off valve and a vacuum pump set, the vacuum pump set comprises a water ring vacuum pump, a buffer tank, a liquid-gas exchange box and a water replenishing pump, the water ring vacuum pump is arranged between the buffer tank and the liquid-gas exchange box, the liquid-gas exchange box is connected with the water replenishing pump, the buffer tank is communicated with the siphon through a vacuum tube, the vacuum tube is provided with the vacuum tube cut-off valve; the automatic monitoring control system comprises: the siphon system comprises a PLC, and a touch screen, a motor control relay, a flow signal sensor, a pressure signal sensor, a temperature signal sensor, a water level signal sensor, a motor comprehensive protector and a valve opening sensor which are electrically connected with the PLC, wherein the touch screen is used for displaying monitoring pictures of various running process parameters of the siphon system and the on-off state of various running equipment operated by a touch screen; the utility model discloses a siphon, including siphon, water ring vacuum pump, motor integrated protection ware, motor control relay, flow signal sensor, temperature signal sensor, water level signal sensor, valve opening sensor, PLC and siphon outlet regulating valve and vacuum tube trip valve, the motor integrated protection ware, motor control relay respectively with the motor of water ring vacuum pump is connected, flow signal sensor sets up on the siphon, be used for the monitoring the liquid flow in the siphon, pressure signal sensor is provided with the multiunit, is located respectively in siphon entry, siphon peak, siphon export, buffer tank and the reservoir, temperature signal sensor is provided with the multiunit, is located respectively in buffer tank, liquid gas exchange tank and the reservoir, valve opening sensor is provided with two sets ofly, is located respectively siphon outlet regulating valve and vacuum tube trip valve department, PLC with siphon outlet regulating valve and vacuum tube trip valve electric connection.
Optionally, a detection signal input end of the PLC is subjected to photoelectric isolation input, and a signal output end of the flow signal sensor, a signal output end of the pressure signal sensor, a signal output end of the temperature signal sensor, a signal output end of the water level signal sensor, a signal output end of the motor comprehensive protector and a signal output end of the valve opening sensor are respectively connected with the detection signal input end of the PLC; and the output signal of the PLC is isolated and output by adopting a relay.
Optionally, the PLC adopts siemens S7-200SMART series, and has an IO module, a digital input channel, a digital output channel, an analog input channel, an analog output channel, and a thermal resistance input channel.
Optionally, the PLC is provided with a standby input and output signal connection terminal.
Optionally, the PLC performs control in three modes, including a field control mode, a remote control mode, and a field emergency relay control mode; wherein,
the field control mode adopts an automatic mode, and real-time control and detection of field equipment are realized through a field touch screen man-machine interface according to preset rules and an adjusting method;
the remote control mode is a mode of remotely controlling the operation/stop of the vacuum jet siphon drainage equipment and carrying out data monitoring by combining an industrial intelligent gateway integrating multiple internet access modes with a cloud service platform through a remote touch screen human-computer interface;
the field emergency relay control mode adopts a manual mode, and the buttons on the panel of the electric control cabinet are used for directly controlling the start and stop actions of the water ring vacuum pump and the water replenishing pump through electric elements in the electric control cabinet through a human-computer interface of a field emergency lamp screen.
Optionally, the PLC includes a vacuum pump set control module, a vacuum pipe valve control module, a siphon pipe control module, an outlet valve control module, and a threshold monitoring alarm module; wherein,
the vacuum pump set control module is used for automatically controlling a vacuum pump set in the siphon liquid-gas exchange unit and sending a buffer tank pressure signal, a buffer tank liquid level signal, a liquid-gas exchange tank water temperature signal, a water ring vacuum pump exhaust main pipe temperature signal, a vacuum pipe starting signal, a water ring vacuum pump stopping signal, a water ring vacuum pump running signal, a water replenishing pump starting signal, a water replenishing pump stopping signal and a water replenishing pump fault alarm signal to the PLC;
the vacuum tube valve control module is used for automatically controlling a vacuum tube valve at the top of the siphon tube and sending a vacuum tube valve opening setting signal, a vacuum tube valve opening feedback signal, a water ring vacuum pump inlet valve opening signal, a water ring vacuum pump inlet valve closing signal, a buffer tank drain valve opening signal and a buffer tank drain valve closing signal to the PLC;
the siphon control module is used for monitoring the operating conditions of all parts of the siphon and sending a water outlet level signal, a water inlet level signal, a siphon pipeline inlet pressure signal, a siphon pipeline highest point pressure signal and a siphon pipeline outlet pressure signal to the PLC;
the outlet valve control module is used for automatically controlling the siphon pipeline valve and sending a siphon outlet flow signal, a siphon outlet valve opening setting signal, a siphon outlet valve opening feedback signal and a siphon outlet temperature signal to the PLC;
the threshold monitoring and alarming module is used for monitoring the operation condition of the equipment, the operation condition of the equipment comprises an electric quantity threshold and a process threshold, the threshold crossing value and the threshold crossing moment of the electric quantity threshold and the process threshold are stored as alarm records, and a PLC outputs an alarm signal; the electric quantity threshold value comprises inlet wire voltage, total current and total power, and the process threshold value comprises upper and lower limit water levels and vacuum degree.
Optionally, the monitored control system still is provided with power module, power module is AC380V, the on-the-spot power supply of three-phase five-wire system, after power module access switch-in switch board, connect to the master breaker through binding post, the motor of water ring vacuum pump and the control circuit of siphon outlet valve all have solitary motor protection circuit breaker to protect it.
Optionally, the monitoring system further comprises a switching knob, a confirmation button and a buzzer, the switching knob, the confirmation button and the buzzer are all arranged below the touch screen and are respectively connected with the PLC, the switching knob is used for switching touch control and button control, the confirmation button is used for confirming fault alarm, and the buzzer is used for alarm prompt.
Optionally, the monitoring system further includes an emergency lamp screen for controlling the start and stop of the water ring vacuum pump and the water replenishing pump through an electrical element in the electric control cabinet, and feeding the running state back to the indicator lamp on the panel of the electric control cabinet.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the vacuum jet siphon drainage equipment monitoring system based on the PLC can improve the real-time management and operation efficiency of the system by monitoring a plurality of signals of the siphon system, thereby ensuring the continuous and controllable operation of the vacuum jet siphon drainage equipment, avoiding the water flow cutoff of a pipeline caused by the cavitation of the water flow in a siphon pipeline in the drainage process, improving the water delivery efficiency of the siphon pipeline, and simultaneously being capable of rapidly troubleshooting when a fault occurs, improving the operation stability and the water delivery efficiency of the siphon pipeline, and being more intuitive and more convenient to adjust and control, and has the advantages of simple structure, reliable operation and higher integration level.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a vacuum jet siphon drainage equipment monitoring system based on PLC according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an operation panel according to an embodiment of the present invention;
FIG. 3 is a schematic process flow diagram of a vacuum jet siphon drainage system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the division of a PLC control system according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a touch screen login screen according to an embodiment of the present invention;
FIG. 6 is a schematic view of a monitoring screen of a vacuum jet siphon drainage system according to an embodiment of the present invention;
FIG. 7 is a schematic view of a monitoring screen of a main vacuum jet siphon pipeline according to an embodiment of the present invention;
FIG. 8 is a diagram illustrating an abnormal message monitoring screen according to an embodiment of the present invention;
FIG. 9 is a first diagram of a process parameter setting screen according to an embodiment of the present invention;
FIG. 10 is a second drawing of a process parameter setting screen according to an embodiment of the present invention;
FIG. 11 is a schematic view of a pressure trend monitoring screen according to an embodiment of the present invention;
FIG. 12 is a diagram illustrating a system setup screen according to an embodiment of the present invention;
fig. 13 is a schematic view of a button operation screen of the emergency relay control system according to the embodiment of the invention;
description of reference numerals: 1. a flow signal sensor; 2. a pressure signal sensor; 3. a temperature signal sensor; 4. a water level signal sensor; 5. a motor comprehensive protector; 6. a valve opening sensor; 7. a touch screen; 8. a PLC; 9. a motor control relay; 10. a water ring vacuum pump; 11. a vacuum tube cut-off valve; 12. the siphon outlet regulating valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a vacuum jet siphon drainage equipment monitoring system based on a PLC (programmable logic controller), which is used for improving the water delivery efficiency of a siphon pipeline, realizing the automatic operation and continuous controllability of the system and has the characteristics of simple structure, reliable operation and higher integration level.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 3, a PLC-based vacuum jet siphon drainage equipment monitoring system provided in an embodiment of the present invention includes a vacuum jet siphon water taking system, a vacuum power system, and an automatic monitoring control system, wherein the vacuum jet siphon water taking system includes a submersible vacuum jet rectifier, a siphon tube, and a siphon tube outlet regulating valve 12, the submersible vacuum jet rectifier is disposed in a water reservoir, the siphon tube is connected to the submersible vacuum jet rectifier, the siphon tube outlet regulating valve 12 is disposed at an outlet of the siphon tube, the vacuum power system includes a vacuum tube cut-off valve 11 and a vacuum pump set, the vacuum pump set includes a water ring vacuum pump 10, a buffer tank, a liquid-gas exchange box, and a water replenishing pump, the water ring vacuum pump is disposed between the buffer tank and the liquid-gas exchange box, the liquid-gas exchange box is connected to the water replenishing pump, the buffer tank is communicated with the siphon through a vacuum pipe, and the vacuum pipe is provided with a vacuum pipe cut-off valve 11; the automatic monitoring control system comprises: the siphon system comprises a PLC8, a touch screen 7, a motor control relay 9, a flow signal sensor 1, a pressure signal sensor 2, a temperature signal sensor 3, a water level signal sensor 4, a motor comprehensive protector 5 and a valve opening sensor 6, wherein the touch screen 7 is electrically connected with the PLC8, and the touch screen 7 is used for displaying monitoring pictures of various running process parameters of the siphon system and the on-off state of various running equipment in touch screen operation; the motor comprehensive protector 5 and the motor control relay 9 are respectively connected with a motor of the water ring vacuum pump 10, the flow signal sensor 1 is arranged on the siphon pipe, used for monitoring the liquid flow in the siphon pipe, the pressure signal sensors 2 are provided with a plurality of groups which are respectively positioned in the siphon pipe inlet, the highest point of the siphon pipe, the siphon pipe outlet, the buffer tank and the water reservoir, the temperature signal sensors 3 are provided with a plurality of groups which are respectively arranged in the siphon and the liquid-gas exchange box, the water level signal sensors 4 are provided with a plurality of groups which are respectively positioned in the buffer tank, the liquid-gas exchange tank and the water reservoir, two groups of valve opening sensors 6 are arranged and are respectively positioned at the siphon outlet regulating valve 12 and the vacuum tube cut-off valve 11, the PLC is electrically connected with the siphon outlet regulating valve 12 and the vacuum tube cut-off valve 11.
The detection signal input end of the PLC8 adopts photoelectric isolation input, and the signal output end of the flow signal sensor 1, the signal output end of the pressure signal sensor 2, the signal output end of the temperature signal sensor 3, the signal output end of the water level signal sensor 4, the signal output end of the motor comprehensive protector 5 and the signal output end of the valve opening sensor 6 are respectively connected with the detection signal input end of the PLC 8; the output signal of the PLC8 is isolated and output by a relay.
The PLC8 adopts Siemens S7-200SMART series, and is provided with an IO module, a digital quantity input channel, a digital quantity output channel, an analog quantity input channel, an analog quantity output channel and a thermal resistance input channel.
The PLC8 is provided with spare input and output signal terminals.
As shown in fig. 4, the PLC8 is controlled in three modes, including a field control mode, a remote control mode, and a field emergency relay control mode; wherein,
the field control mode adopts an automatic mode, and real-time control and detection of field equipment are realized through a field touch screen man-machine interface according to preset rules and an adjusting method; the PLC logic control function is utilized to provide automatic control of the equipment and linkage and interlocking control of the associated equipment, and the interlocking relationship is as follows:
protection of a water ring vacuum pump: 1) the water ring vacuum pumps are interlocked, only one water ring vacuum pump can be started each time, the programs are interlocked, and the relay wires are interlocked; 2) the liquid level of the buffer tank is lower than a set low water level, a water ring vacuum pump is allowed to be boiled, the liquid level is higher than a set high water level, an inlet cut-off valve of the buffer tank is closed, and the water ring vacuum pump is closed; 3) when the water level of the liquid-gas exchange tank is higher than a set high water level, the water ring vacuum pump is allowed to be started, and when the water level of the liquid-gas exchange tank is lower than a set low water level, the stop valve at the inlet of the buffer tank is closed, and the water ring vacuum pump is closed;
water level water replenishing protection of the liquid-gas exchange tank: 1) the liquid level is lower than the set low water level, the water replenishing pump is allowed to be started, and the liquid level is higher than the set high water level, and the water replenishing pump is stopped; 2) when the liquid level of the buffer tank is higher than the set high water level, closing the ball valve at the inlet of the buffer tank, closing the water ring vacuum pump and opening the discharge valve;
and (3) current cutoff protection: the negative pressure value at the top of the siphon pipe is higher than the set negative pressure value, and the opening value of the valve is locked to prevent the flow from being cut off.
The water level, siphon pipeline flow and outlet valve cascade regulation of the submersible vacuum jet rectifier are as follows: 1) when the valve is operated manually, the valve position of the outlet valve is arranged through the panel, the set flow of the flow signal sensor is consistent with the indicated flow, and the set water level of the water level regulator of the submersible vacuum jet flow rectifier is consistent with the indicated water level; 2) when the flow is automatically controlled, the valve position of the outlet valve is controlled by the flow signal sensor, and the water level set by the rectifier water level regulator is consistent with the indicated water level; 3) when the water level is automatically controlled, the valve position of the outlet valve is controlled by the water level regulator, and the set flow of the flow signal sensor is consistent with the indicated flow;
4) the water level and the flow are regulated in a cascade mode, the valve position of the outlet valve is controlled through a flow signal sensor, the setting of the flow signal sensor is controlled through a water level regulator, and the setting of the water level regulator is manually controlled through a panel.
The remote control mode is a mode of remotely controlling the operation/stop of the vacuum jet siphon drainage equipment and carrying out data monitoring by combining an industrial intelligent gateway integrating multiple internet access modes with a cloud service platform through a remote touch screen human-computer interface;
the field touch screen man-machine interface and the remote touch screen man-machine interface realize real-time control and detection of field equipment by operating a PLC control system in an electric control cabinet, have the characteristics of vividness, intuition, simple operation, convenience for system maintenance and the like, and integrate various buttons, indicator lamps, counters, time relays and various schematic diagrams in the conventional operation panel; the operation panel is used as an interaction platform between an operator and the equipment, receives an operation instruction from the operator and indicates the working state of the equipment; the control element used by the system comprises a relay and a signal isolator, wherein a control coil of the relay is connected with an output point of the PLC, when the control coil of the relay is electrified, a contact of the relay is connected to supply power for a motor and a valve, and the signal isolator is used for controlling the on-off state of the electric actuating mechanism so as to drive the corresponding mechanism to complete corresponding action;
the field emergency relay control mode adopts a manual mode, a button on a panel of the electric control cabinet is used for directly controlling the start and stop actions of the water ring vacuum pump and the water replenishing pump through electric elements such as a relay, a contactor and the like in the electric control cabinet through a human-computer interface of a field emergency lamp screen, and the running state is fed back to an indicator lamp on the panel of the electric control cabinet. The emergency relay control mode is used for emergently starting the vacuum pump to inject water into the siphon pipeline when the PLC control system breaks down, starting and stopping of the water ring vacuum pump and the water replenishing pump are operated by using the buttons, and the running state is displayed by using the indicating lamp.
The PLC8 comprises a vacuum pump set control module, a vacuum tube valve control module, a siphon tube control module, an outlet valve control module and a threshold monitoring alarm module; wherein,
the vacuum pump set control module is used for automatically controlling a vacuum pump set in the siphon liquid-gas exchange unit and sending a buffer tank pressure signal, a buffer tank liquid level signal, a liquid-gas exchange tank water temperature signal, a water ring vacuum pump exhaust main pipe temperature signal, a vacuum pipe starting signal, a water ring vacuum pump stopping signal, a water ring vacuum pump running signal, a water replenishing pump starting signal, a water replenishing pump stopping signal and a water replenishing pump fault alarm signal to the PLC;
the vacuum tube valve control module is used for automatically controlling a vacuum tube valve at the top of the siphon tube and sending a vacuum tube valve opening setting signal, a vacuum tube valve opening feedback signal, a water ring vacuum pump inlet valve opening signal, a water ring vacuum pump inlet valve closing signal, a buffer tank drain valve opening signal and a buffer tank drain valve closing signal to the PLC;
the siphon control module is used for monitoring the operating conditions of all parts of the siphon and sending a water outlet level signal, a water inlet level signal, a siphon pipeline inlet pressure signal, a siphon pipeline highest point pressure signal and a siphon pipeline outlet pressure signal to the PLC;
the outlet valve control module is used for automatically controlling the siphon pipeline valve and sending a siphon outlet flow signal, a siphon outlet valve opening setting signal, a siphon outlet valve opening feedback signal and a siphon outlet temperature signal to the PLC;
the threshold monitoring and alarming module is used for monitoring the operation condition of the equipment, the operation condition of the equipment comprises an electric quantity threshold and a process threshold, the threshold crossing value and the threshold crossing moment of the electric quantity threshold and the process threshold are stored as alarm records, and a PLC outputs an alarm signal; the electric quantity threshold value comprises inlet wire voltage, total current and total power, and the process threshold value comprises upper and lower limit water levels and vacuum degree.
The monitoring system is further provided with a power supply module, the power supply module is an AC380V and three-phase five-wire system field power supply, the power supply module is connected to a main circuit breaker through a wiring terminal after being connected to a control cabinet, and a motor of the water ring vacuum pump and a control loop of a siphon outlet valve are protected by an independent motor protection circuit breaker, so that the safe operation of the motor is ensured, and a fault point is conveniently searched under the condition of fault.
The monitoring system further comprises a switching knob 13, a confirmation button 14 and a buzzer 15, wherein the switching knob 13, the confirmation button 14 and the buzzer 15 are all arranged below the touch screen 7 and are respectively connected with the PLC8, the switching knob 13 is used for switching touch control and button control, the confirmation button 14 is used for confirming fault alarm, and the buzzer 15 is used for alarm prompt. The touch screen 7 enters a login picture after being electrified, users with different authorities can be switched, users with different user names and passwords can be input to enter the control system, the functions of the touch screen 7 comprise a vacuum system monitoring picture, a siphon pipeline monitoring picture, abnormal information detection, parameter setting, trend and a system setting picture, the vacuum system monitoring picture can monitor operating process parameters and control valve switch states of the vacuum system, the siphon pipeline monitoring picture can monitor operating process parameters and control valve switch states of the vacuum system, the abnormal information detection picture can monitor threshold value alarm and process alarm states, the parameter setting picture can set instrument measuring range, alarm value and the like, the trend picture can monitor real-time trends of pressure, temperature and liquid level in the siphon pipeline and the vacuum system, and the system setting picture can maintain user account information, abnormal information and abnormal information, Modify system time, calibration screen, etc.
The monitoring system also comprises an emergency lamp screen which is used for controlling the start and stop actions of the water ring vacuum pump and the self-priming pump through electric elements in the electric control cabinet and feeding back the running state to an indicator lamp on a panel of the electric control cabinet.
The system has two operation modes of touch control and button control, wherein the touch control mode is used for setting and controlling operation on a touch screen, the button control mode has emergency control under the unpowered condition, the control state of the siphon device is determined through a touch/button switching knob on a control cabinet, when the system is in an unreasonable state, an alarm is automatically generated, a buzzer rings and an indicator light stroboflash when the alarm is given, and the fault alarm is confirmed by pressing a confirmation button.
The alarm signal categories are as follows: a) the water ring vacuum pump has failed in starting motor and failed in pump set; b) valve failure and control failure; c) ultra-high liquid level, ultra-low liquid level; d) the vacuum negative pressure value is too high; e) instrument, transmitter faults; circuit failure, etc.
As shown in fig. 5, after the touch screen of the on-site electric control cabinet and the touch screen of the remote control box are powered on, the user enters a login picture, the login system is clicked, a user name and a password are input to enter the control system, and the login picture can be switched among users with different permissions.
As shown in fig. 6, after logging in the system, the user automatically enters or selects a "vacuum pump system" button below the screen to enter a "vacuum system automatic monitoring screen", where each operating process parameter of the vacuum system and the on-off state of a control valve can be monitored, the middle part of the screen at the top is a "screen name", the right part is a system date/time display, the middle area of the screen is a main monitoring screen for monitoring, controlling, setting each process parameter, etc., and the lowest part of the screen is a switching button, which can switch each display screen; the switch button is displayed below each screen.
As shown in fig. 7, a "main pipe system" button below any one of the pictures is selected to enter a siphon pipe monitoring picture, and the picture can monitor various process parameters and valve states in the vacuum system.
As shown in fig. 8, the abnormal information below any one of the screens is selected and enters an abnormal information monitoring screen, where the system alarm and process alarm states can be monitored.
As shown in fig. 9 to 10, the parameter setting below any one of the screens is selected, and the parameter setting screen is entered, where the meter range, the alarm value, and the like can be set.
As shown in fig. 11, a trend picture below any one picture is selected, and a trend monitoring picture is entered, where real-time trends of pressures, temperatures, and liquid levels in a siphon pipe and a vacuum system can be monitored.
As shown in fig. 12, [ system setting ] below any screen is selected, and a system setting screen is entered, in which information such as user account information, system time modification, and calibration screen may be maintained.
As shown in fig. 13, the vacuum pump start-stop button is used to control the start-stop state of the vacuum pump, and the water replenishing pump start-stop button is used to control the start-stop state of the water replenishing pump.
The monitoring application software designed according to the invention can form a distributed system structure in the form of a client and a server, and has the functions of real-time data acquisition, alarm and event management, historical data storage, report generation, local and remote communication, data control, good design and configuration functions (human-computer interface) in industrial automation application, and safety setting functions of hierarchical authority, password protection and the like.
The remote monitoring system can perform corresponding safety processing on various alarm types, and can flicker corresponding indicator lights on a monitoring picture and simultaneously give out alarm sound for prompting. Alarm object, content, time; and the list recording or printing is realized, and a full graphical interface, full integration and object-oriented development mode is realized, so that system management personnel can use the system management equipment conveniently, and the system management equipment is simple and easy to learn.
The human-computer interface is a Chinese interface, is simple, convenient, flexible and reliable to operate, collects field equipment data, generates a real-time dynamic diagram of a production process flow, and provides a clear and friendly human-computer monitoring interface for system operation management operators.
According to the design of system operation authority, the operator level authority can only monitor, control and adjust system equipment and set parameters, and only the engineer authority can allow various application software to be installed, modified or tested, so that the stability in operation is ensured.
The invention relates to a measurement and control object, in particular to a set of vacuum jet siphon drainage system, which comprises the following measurement and control signals: the flow, pressure, temperature, water level, motor signal and valve position are respectively sent by a flow signal sensor, a pressure signal sensor, a temperature signal sensor, a water level signal sensor, a motor comprehensive protector and a valve opening sensor.
The vacuum jet siphon drainage device comprises the following working steps:
step 1: the vacuum jet siphon drainage equipment is filled with water, firstly, an outlet regulating valve of a siphon pipe is closed, a vacuum pipe cut-off valve is opened, a water ring vacuum pump is started, the water filling height inside a siphon pipeline is calculated according to the jacking force of the siphon pipe and the pressure before the outlet regulating valve, whether the siphon pipeline is full or not is judged, the vacuum pipe cut-off valve and the water ring vacuum pump are closed after the siphon pipeline is full, and the water filling process of the siphon pipeline is completed;
step 2: the vacuum jet siphon drainage equipment drains water, the siphon outlet regulating valve is opened to drain water in a state that the siphon is full, and the drainage quantity of the pipeline can be regulated by regulating the opening degree of the siphon outlet regulating valve;
and step 3: the vacuum jet siphon drainage equipment is shut down, and the siphon outlet regulating valve is closed, so that the siphon system can be shut down.
The vacuum jet siphon drainage equipment has the measurement and control requirements that in the whole working process of a siphon system, the states of each temperature, pressure, flow and water level are detected, the threshold value of each measured value is ensured not to be exceeded, otherwise, an audible and visual alarm is sent, the flow, the pressure and the water level of a number are indicated to be exceeded, and the equipment is automatically stopped in an emergency mode.
The vacuum jet siphon drainage equipment monitoring system based on the PLC can improve the real-time management and operation efficiency of the system by monitoring a plurality of signals of the siphon system, thereby ensuring the continuous and controllable operation of the vacuum jet siphon drainage equipment, avoiding the water flow cutoff of a pipeline caused by the cavitation of the water flow in a siphon pipeline in the drainage process, improving the water delivery efficiency of the siphon pipeline, and simultaneously being capable of rapidly troubleshooting when a fault occurs, improving the operation stability and the water delivery efficiency of the siphon pipeline, and being more intuitive and more convenient to adjust and control, and has the advantages of simple structure, reliable operation and higher integration level.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. A vacuum jet siphon drainage equipment monitoring system based on PLC is characterized by comprising a vacuum jet siphon water taking system, a vacuum power system and an automatic monitoring control system, wherein the vacuum jet siphon water taking system comprises a submersible vacuum jet rectifier, a siphon and a siphon outlet regulating valve, the submersible vacuum jet rectifier is arranged in a water reservoir, the siphon is connected with the submersible vacuum jet rectifier, the siphon outlet regulating valve is arranged at an outlet of the siphon, the vacuum power system comprises a vacuum tube cut-off valve and a vacuum pump set, the vacuum pump set comprises a water ring vacuum pump, a buffer tank, a liquid-gas exchange tank and a water replenishing pump, the water ring vacuum pump is arranged between the buffer tank and the liquid-gas exchange tank, the liquid-gas exchange tank is connected with the water replenishing pump, and the buffer tank is communicated with the siphon through a vacuum tube, the vacuum tube is provided with the vacuum tube cut-off valve; the automatic monitoring control system comprises: the siphon system comprises a PLC, and a touch screen, a motor control relay, a flow signal sensor, a pressure signal sensor, a temperature signal sensor, a water level signal sensor, a motor comprehensive protector and a valve opening sensor which are electrically connected with the PLC, wherein the touch screen is used for displaying monitoring pictures of various running process parameters of the siphon system and the on-off state of various running equipment operated by a touch screen; the utility model discloses a siphon, including siphon, water ring vacuum pump, motor integrated protection ware, motor control relay, flow signal sensor, temperature signal sensor, water level signal sensor, valve opening sensor, PLC and siphon outlet regulating valve and vacuum tube trip valve, the motor integrated protection ware, motor control relay respectively with the motor of water ring vacuum pump is connected, flow signal sensor sets up on the siphon, be used for the monitoring the liquid flow in the siphon, pressure signal sensor is provided with the multiunit, is located respectively in siphon entry, siphon peak, siphon export, buffer tank and the reservoir, temperature signal sensor is provided with the multiunit, is located respectively in buffer tank, liquid gas exchange tank and the reservoir, valve opening sensor is provided with two sets ofly, is located respectively siphon outlet regulating valve and vacuum tube trip valve department, PLC with siphon outlet regulating valve and vacuum tube trip valve electric connection.
2. The PLC-based vacuum jet siphon drainage equipment monitoring system of claim 1, wherein a detection signal input end of the PLC adopts a photoelectric isolation input, and a signal output end of the flow signal sensor, a signal output end of the pressure signal sensor, a signal output end of the temperature signal sensor, a signal output end of the water level signal sensor, a signal output end of the motor comprehensive protector and a signal output end of the valve opening sensor are respectively connected with the detection signal input end of the PLC; and the output signal of the PLC is isolated and output by adopting a relay.
3. The PLC-based vacuum jet siphon drainage equipment monitoring system of claim 1, wherein the PLC employs siemens S7-200SMART series and has IO module and digital quantity input channel, digital quantity output channel, analog quantity input channel, analog quantity output channel, thermal resistance input channel.
4. The PLC-based vacuum jet siphon drainage equipment monitoring system of claim 1, wherein the PLC is provided with spare input and output signal connection terminals.
5. The PLC-based vacuum jet siphon drainage equipment monitoring system of claim 1, wherein the PLC is used for controlling the system in three modes, including a field control mode, a remote control mode and a field emergency relay control mode; wherein,
the field control mode adopts an automatic mode, and real-time control and detection of field equipment are realized through a field touch screen man-machine interface according to preset rules and an adjusting method;
the remote control mode is a mode of remotely controlling the operation/stop of the vacuum jet siphon drainage equipment and carrying out data monitoring by combining an industrial intelligent gateway integrating multiple internet access modes with a cloud service platform through a remote touch screen human-computer interface;
the field emergency relay control mode adopts a manual mode, and the buttons on the panel of the electric control cabinet are used for directly controlling the start and stop actions of the water ring vacuum pump and the water replenishing pump through electric elements in the electric control cabinet through a human-computer interface of a field emergency lamp screen.
6. The PLC-based vacuum jet siphon drainage equipment monitoring system of claim 1, wherein the PLC comprises a vacuum pump set control module, a vacuum tube valve control module, a siphon tube control module, an outlet valve control module and a threshold monitoring alarm module; wherein,
the vacuum pump set control module is used for automatically controlling a vacuum pump set in the siphon liquid-gas exchange unit and sending a buffer tank pressure signal, a buffer tank liquid level signal, a liquid-gas exchange tank water temperature signal, a water ring vacuum pump exhaust main pipe temperature signal, a vacuum pipe starting signal, a water ring vacuum pump stopping signal, a water ring vacuum pump running signal, a water replenishing pump starting signal, a water replenishing pump stopping signal and a water replenishing pump fault alarm signal to the PLC;
the vacuum tube valve control module is used for automatically controlling a vacuum tube valve at the top of the siphon tube and sending a vacuum tube valve opening setting signal, a vacuum tube valve opening feedback signal, a water ring vacuum pump inlet valve opening signal, a water ring vacuum pump inlet valve closing signal, a buffer tank drain valve opening signal and a buffer tank drain valve closing signal to the PLC;
the siphon control module is used for monitoring the operating conditions of all parts of the siphon and sending a water outlet level signal, a water inlet level signal, a siphon pipeline inlet pressure signal, a siphon pipeline highest point pressure signal and a siphon pipeline outlet pressure signal to the PLC;
the outlet valve control module is used for automatically controlling the siphon pipeline valve and sending a siphon outlet flow signal, a siphon outlet valve opening setting signal, a siphon outlet valve opening feedback signal and a siphon outlet temperature signal to the PLC;
the threshold monitoring and alarming module is used for monitoring the operation condition of the equipment, the operation condition of the equipment comprises an electric quantity threshold and a process threshold, the threshold crossing value and the threshold crossing moment of the electric quantity threshold and the process threshold are stored as alarm records, and a PLC outputs an alarm signal; the electric quantity threshold value comprises inlet wire voltage, total current and total power, and the process threshold value comprises upper and lower limit water levels and vacuum degree.
7. The PLC-based vacuum jet siphon drainage equipment monitoring system as claimed in claim 1, wherein the monitoring system is further provided with a power supply module, the power supply module is an AC380V three-phase five-wire system on-site power supply, the power supply module is connected to a main circuit breaker through a wiring terminal after being connected to a control cabinet, and a motor of the water ring vacuum pump and a control loop of a siphon outlet valve are protected by separate motor protection circuit breakers.
8. The PLC-based vacuum jet siphon drainage equipment monitoring system of claim 1, further comprising a switching knob, a confirmation button and a buzzer, wherein the switching knob, the confirmation button and the buzzer are all arranged below the touch screen and are respectively connected with the PLC, the switching knob is used for switching touch control and button control, the confirmation button is used for confirming fault alarm, and the buzzer is used for alarm prompt.
9. The PLC-based vacuum jet siphon drainage equipment monitoring system as claimed in claim 1, further comprising an emergency lamp screen for controlling the start and stop actions of the water ring vacuum pump and the water replenishing pump through electrical elements in the electric control cabinet and feeding the running state back to an indicator lamp on a panel of the electric control cabinet.
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