CN109737040B - Integrated medical vacuum negative-pressure machine electrical control system and electrical control method thereof - Google Patents
Integrated medical vacuum negative-pressure machine electrical control system and electrical control method thereof Download PDFInfo
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Abstract
The invention provides an integrated medical vacuum negative-pressure machine electric control system, which comprises a central control part and at least two identical motor unit control parts, wherein the central control part is electrically connected with all the motor unit control parts; the central control part respectively controls each motor unit control part to work, or the central control part starts the mutual online operation between each motor unit control part after the central control part fails; the central control part comprises a central controller, a switch and control power supply module, a central human-computer interface touch screen, an analog quantity A/D conversion module, a three-color lamp indication module, a manual/automatic control module and a phase sequence protection module; each motor unit control part comprises a motor controller, a power supply module for supplying power to a single vacuum pump motor, a motor protection control module for protecting the single vacuum pump motor, a load switch, a motor human-computer interface touch screen and a vacuum electromagnetic valve; the invention further provides an electrical control method of the integrated medical vacuum negative-pressure machine.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to an electrical system control technology, in particular to an integrated medical vacuum negative pressure machine electrical control system and an electrical control method thereof.
[ background of the invention ]
Hospitals above the middle level in the country all adopt the form of a centralized negative pressure pump station to provide negative pressure gas for operating rooms, wards and other departments needing to use negative pressure suction, and when the system works, the centralized negative pressure pump station utilizes a medical gas pipeline system to suck through a vacuum pump, so that each pipeline of the system generates medical negative pressure, and suction is generated at the terminals of the operating rooms, rescue rooms, treatment rooms and each ward to provide medical use.
In the prior art, one of common negative pressure suction devices is in a manual mode, the other one is in an electric mode, negative pressure provided by the manual mode is unstable, the operation of the two units is switched manually and is inconvenient to operate, the air storage tank and the filter are periodically drained by workers, and the workload of the workers is large.
The electric mode has low automation degree, can not supply power continuously, and along with the increasing of the number of patients, when the air consumption of a certain period of time of a hospital exceeds the originally designed air supply, and the vacuum suction of one unit is insufficient, the other unit can not automatically follow the starting to supplement the vacuum degree; in addition, because the working time of the two vacuum pumps is inconsistent, the loss is inconsistent, the maintenance work is difficult, and the maintenance cost is increased; meanwhile, when a pressure pump has a problem, the pressure pump cannot work continuously, and the electrification degree is low; and in the case of abnormal conditions, the system does not have the sound-light alarm function, and cannot carry out remote alarm and remote monitoring.
[ summary of the invention ]
The invention provides an integrated medical vacuum negative pressure machine electric control system and an electric control method thereof, wherein the integrated medical vacuum negative pressure machine electric control system adopts central integrated control, adopts a dual working mode of following operation and alternate operation, freely switches two control modes of full automation and manual operation, transmits and alarms in real time, and has independent operation function for each motor unit control part when a central control part monitors faults.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
the integrated medical vacuum negative pressure machine electrical control system comprises a central control part and at least two identical motor unit control parts, wherein the central control part is electrically connected with all the motor unit control parts; the central control part respectively controls each motor unit control part to work, or the central control part starts the mutual online operation between each motor unit control part after failure;
the central control part comprises a central controller, a switch and control power supply module, a central human-computer interface touch screen, an analog quantity A/D conversion module, a three-color lamp indication module, a manual/automatic control module and a phase sequence protection module, wherein the switch and control power supply module, the central human-computer interface touch screen, the analog quantity A/D conversion module and the three-color lamp indication module are respectively and independently connected with the central controller, the central controller controls the manual or automatic start and stop of each motor unit control part through the manual/automatic control module, and the central controller monitors the input of an alarm signal of the phase sequence or open phase protection of the main power supply through the phase sequence protection module; the central controller also follows and monitors the running state of each motor unit control part through an analog quantity A/D conversion module and a three-color lamp indicating module respectively, and performs sound-light alarm;
each motor unit control part comprises a motor controller, a power supply module for supplying power to a single vacuum pump motor, a motor protection control module for protecting the single vacuum pump motor, a load switch, a motor man-machine interface touch screen and a vacuum electromagnetic valve, wherein the motor man-machine interface touch screen and the motor controller are used for controlling the starting and stopping of the single vacuum pump motor, the opening and closing of the vacuum electromagnetic valve and the online operation of the single vacuum pump motor in the central controller and other motor unit control parts.
Further, the central control part also comprises an emergency stop module electrically connected with the central controller.
Further, the central controller and the motor controller are both programmable controllers.
Further, the central control part is arranged in a single independent central control box body, and the central control box body is an independent box body.
Further, the motor protection control module is a motor circuit breaker providing protection for a single vacuum pump motor.
Further, the power supply module is an alternating current contactor for providing alternating current power supply for the motor of the single vacuum pump.
Furthermore, each motor unit control part is arranged in an independent motor control box body, the motor control box body is an independent box body, and an independent motor control box body is respectively added for each additional motor unit control part.
Further, a load switch on the motor unit control part is a pressure sensor.
The electrical control method of the integrated medical vacuum negative-pressure machine comprises the following steps:
(I) control procedure of central control part
step 3, in the manual/automatic control module, when a change-over switch 'manual/automatic switch' is turned to a 'manual' position, a single vacuum pump motor start-stop and a vacuum solenoid valve switch are manually operated on each motor unit control part on a central human-computer interface touch screen; when the change-over switch is turned to an 'automatic' position, an 'automatic operation switch' on the central human-computer interface touch screen is turned on, an emergency stop signal on the emergency stop module is not disconnected, an alarm signal of the circuit breaker is controlled not to be closed, an on-line signal between the motor unit control parts is closed, and when the alarm signal is not closed, an automatic operation program starts to be executed, a light signal is controlled to be output, and a green light in the three-color light indication module is normally on;
step 4, after the system starts to operate, when an online signal X3 of the No. 1 first motor unit control part is closed, a starting signal is output, the starting signal of the first motor unit control part is triggered, a vacuum pump motor is started, the first motor unit control part which receives the starting signal feeds back an 'operating signal' within a set delay time, the online signal between the central control part and the first motor unit control part is closed, if the delay time is exceeded and the feedback signal is not received, the system gives an alarm and stops the current first motor unit control part until the alarm is released;
step 5, when the on-line signal of the first motor unit control part is disconnected and the on-line signal of the second motor unit control part is closed, outputting a starting signal of the second motor unit control part, triggering the starting signal of the second motor unit control part to start a vacuum pump motor of the second motor unit control part, feeding back an 'in-operation signal' by the second motor unit control part receiving the starting signal within a set delay time to close the on-line signal between the central control part and the second motor unit control part, and if the delay time is exceeded and the feedback signal is not received, alarming by the system and stopping the current second motor unit control part until the alarm is released;
step 6, when the on-line signal of the first motor unit control part and the on-line signal of the second motor unit control part are both closed, the first motor unit control part works preferentially and operates in turn with the second motor unit control part;
step 7, restarting after power failure, wherein when the system runs normally, the system runs automatically under the condition of sudden power failure and after being electrified again under the condition of no shutdown alarm signal, and current output is executed;
(II) control procedure of motor unit control part
a. On-line control between central control unit and motor unit control unit
Step 8, after the system is powered on, the motor circuit breaker receives a closing signal to close, the system is in a standby state, and an online signal between the central control part and the motor unit control part is closed;
step 9, when the starting signal is closed, the motor controller outputs the starting signal to drive the coil of the contactor to close the main contact and the normally open contact, the power supply module corresponding to the vacuum pump motor opens the power supply, the contactor closes the feedback main circuit signal after closing, and the vacuum pump motor starts at the moment and outputs the running signal of the motor unit control part;
outputting a vacuum solenoid valve signal after 10 seconds and 10 seconds, and opening the vacuum solenoid valve; if the signal is fed back to the central control part in operation, under the condition that the time delay internal pressure value set by the central control part is unchanged, the central control part considers that the motor unit control part is in failure and gives an alarm, and the starting signal is cut off to stop the motor of the vacuum pump;
b. operation of each motor unit control unit on-line with each other
Step 11, under the condition that the central control part is in failure or other damages, the motor unit control part and other motor unit control parts are mutually connected to run;
when the system is powered on, the motor circuit breaker receives a closing signal to close, the system is in a standby state, an online signal X4 of the central control part is disconnected, the system counts time for 30 seconds, the system belongs to an online operation mode between the motor unit control part and other motor unit control parts after the timing time is up, and the system automatically operates the first motor unit control part after the delay time is up;
The invention has the beneficial effects that:
the invention adopts an open type module splicing structure, the central control part is arranged in an independent central control box body, each motor unit control part is also arranged in an independent motor control box body, the motor unit control parts can be modularly and infinitely spliced by taking the motor unit control parts as units, the installation and the displacement are convenient, and the manufacturing basic cost of hospitals is saved.
Meanwhile, the central control part adopts central integrated control and has high automation degree, the central control part respectively controls the work of each motor unit control part, and the motor unit control parts are connected with each other to run under the condition that the central control part is in fault or is damaged; when the motor unit works, the control parts of the motor units adopt a dual working mode of following operation and alternate operation, and can freely switch between a full-automatic control mode and a manual control mode, so that information is transmitted and an alarm is given in real time.
And each motor unit control part has an independent operation function when the central control part monitors faults, the double motor unit control parts are mutually standby, when one motor unit control part fails, the other motor unit control part is put into operation at once, the working stability of the system can be ensured, and the operation safety of the system is enhanced.
[ description of the drawings ]
FIG. 1 is a schematic diagram of the system connections of the present invention;
FIG. 2 is a control flow chart of the central control section of the present invention;
fig. 3 is a control flowchart of the motor unit control section of the present invention.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
[ detailed description ] embodiments
An integrated medical vacuum negative pressure machine electric control system is shown in fig. 1 and comprises a central control part 1 and two identical motor unit control parts 2, wherein the central control part 1 is electrically connected with all the motor unit control parts 2; the central control part 1 respectively controls the operation of each motor unit control part 2, or starts the mutual online operation between each motor unit control part 2 after the central control part 1 fails.
As shown in fig. 1, the central control unit 1 includes a central controller 10, a switch and control power supply module 11, a central human-machine interface touch screen 12, an analog a/D conversion module 13, a three-color light indication module 14, a manual/automatic control module 15, a phase sequence protection module 16, and an emergency stop module 17 electrically connected to the central controller 10, the switch and control power supply module 11, the central man-machine interface touch screen 12, the analog quantity A/D conversion module 13, the three-color lamp indication module 14, the manual/automatic control module 15, the phase sequence protection module 16 and the emergency stop module 17 are respectively and independently connected with the central controller 10, the central controller 10 controls the manual or automatic start and stop of each motor unit control part 2 through the manual/automatic control module 15, and the central controller 10 monitors the input of an alarm signal of the phase sequence or open-phase protection of the main power supply through the phase sequence protection module 16; the central controller 10 also follows and monitors the running state of each motor unit control part 2 and carries out sound-light alarm through an analog quantity A/D conversion module 13 and a three-color lamp indication module 17 respectively; the central control part 1 is arranged in a single independent central control box body, and the central control box body is an independent box body.
As shown in fig. 1, each motor unit control part 2 includes a motor controller 20, a power supply module (not shown) for supplying power to the individual vacuum pump motors 21, a motor protection control module 22 for protecting the individual vacuum pump motors 21, a load switch 23, a motor human-machine interface touch screen 24 and a vacuum solenoid valve 25, and the motor human-machine interface touch screen 24 and the motor controller 20 are used for controlling the start and stop of the individual vacuum pump motors 21, the opening and closing of the vacuum solenoid valve 25, and the online operation of the central controller 10 and the individual vacuum pump motors 21 in the other motor unit control parts 2. Wherein, every motor unit control division 2 sets up in an independent motor control box, and this motor control box is an independent box, and every increases a motor unit control division 2 and increases an independent motor control box respectively.
In the specific assembly, the central controller 10 and the motor controller 20 are both programmable controllers, the motor protection control module 22 provides a motor breaker for protecting a single vacuum pump motor 21, the power supply module provides an ac contactor for providing an ac power supply for the single vacuum pump motor 21, and the load switch 23 on the motor unit control part 2 is a pressure sensor.
Because the system adopts an open module splicing structure, the motor unit control part can be modularly and infinitely spliced by taking the motor unit control part as a unit, so that the installation and the displacement are convenient, and the manufacturing basic cost of a hospital is saved.
The electrical control method of the integrated medical vacuum negative pressure machine comprises the following steps:
(I) a control procedure of the central control part, as shown in FIG. 2,
step 3, in the manual/automatic control module, when a change-over switch 'manual/automatic switch' is turned to a 'manual' position, a single vacuum pump motor start-stop and a vacuum solenoid valve switch are manually operated on each motor unit control part on a central human-computer interface touch screen; when the change-over switch is turned to an 'automatic' position, an 'automatic operation switch' on the central man-machine interface touch screen is turned on at the same time, an emergency stop signal X0 on the emergency stop module is not disconnected, an alarm signal X2 of the circuit breaker is controlled not to be closed, an online signal X3 or X6 between the motor unit control parts is closed, and when the alarm signals X5 and X10 are not closed, an automatic operation program starts to be executed, a light signal Y11 is controlled to be output, and a green light in the three-color light indication module is normally on;
step 4, after the system starts to operate, when the online signal X3 of the first motor unit control part of the No. 1 is closed, a starting signal Y3 is output, the starting signal of the first motor unit control part of the No. 1 is triggered, the vacuum pump motor of the No. 1 is started, the first motor unit control part of the No. 1 which receives the starting signal feeds back an 'operating signal' within the set delay time, the online signal X4 between the central control part and the first motor unit control part of the No. 1 is closed, if the delay time is exceeded and the feedback signal is not received, the system gives an alarm and deactivates the current first motor unit control part of the No. 1 until the alarm is released;
step 5, when the on-line signal X3 of the 1# first motor unit control part is disconnected and the on-line signal X6 of the 2# second motor unit control part is closed, outputting a starting signal Y4 of the second motor unit control part, triggering a starting signal of the 2# second motor unit control part to start a vacuum pump motor of the second motor unit control part, feeding back an 'running signal' by the second motor unit control part receiving the starting signal within a set delay time to close the on-line signal X7 between the central control part and the 2# second motor unit control part, and if the delay time is exceeded and the feedback signal is not received, alarming is carried out by the system, and the current second motor unit control part is stopped until the alarm is relieved;
step 6, when the online signal X3 of the first motor unit control part of the No. 1 and the online signal X6 of the second motor unit control part of the No. 2 are both closed, the first motor unit control part of the No. 1 works preferentially and runs by turns with the second motor unit control part of the No. 2;
the system comprises a negative pressure transmitter, an analog quantity A/D conversion module, a controller program and a controller program, wherein the upper limit and the lower limit of pressure values in the analog quantity A/D conversion module are used as key marks of system output, 4-20mA current signals output by the negative pressure transmitter are converted into digital signals through the analog quantity A/D conversion module and then calculated through proportional calculation through the controller program, when the pressure values reach a set upper limit, the system stops outputting starting signals, and when the pressure values are lower than the lower limit, running signals are started again;
step 7, restarting after power failure, wherein when the system runs normally, the system runs automatically under the condition of sudden power failure and after being electrified again under the condition of no shutdown alarm signal, and current output is executed;
in the above steps, the signal names corresponding to the input contacts or the output contacts in the central control unit are shown in table 1 below:
TABLE 1
| Input contact | Name of signal | Output contact | Name of signal | |
| X0 | Emergency stop button | Y0 | ||
| X1 | Manual/automatic switch | Y1 | ||
| X2 | Controlling relay signals | Y2 | On-line | |
| X3 | ||||
| 1# Unit | Y3 | 1# Unit | ||
| X4 | ||||
| 1# Unit | Y4 | 2# Unit | ||
| X5 | ||||
| 1# Unit | Y5 | |||
| X6 | ||||
| 2# Unit unit | | Buzzer | ||
| X7 | ||||
| 2# Unit section operation | Y7 | | ||
| X10 | ||||
| 2# Unit alarm | Y10 | Yellow light | ||
| Y11 | Green lamp |
(II) control procedure of motor unit control part
The online mode is designed into two control modes, namely a central control online control mode in which the central control part and the motor unit control part are communicated with each other, and a motor unit control part control mode in which the motor unit control part and other motor unit control parts are operated online with each other under the condition that the central control online control mode fails (the central controller fails or is damaged);
the control mode of the motor unit is divided into a local mode and an online mode, the local mode is usually only used during debugging, or when a motor is replaced or a motor cable is reconnected, when the vacuum pump is used, the vacuum pump is operated on a touch screen of a man-machine interface of the motor, the local mode can be opened by clicking the local mode on a mode selection column, and at the moment, the vacuum pump motor can be controlled to start and stop manually or by clicking the local mode on a manual interface.
The motor unit usually works in an 'online mode', the 'online mode' is activated by clicking on a touch screen interface of a motor human-computer interface, and meanwhile, the interface displays the character of the 'online mode';
a. on-line control between central control unit and motor unit control unit
Step 8, after the system is powered on, the motor circuit breaker receives a closing signal X3 to close, the system is in a standby state, an online signal X4 between the central control part and the motor unit control part is closed, and at the moment, the system belongs to a central control online control mode;
step 9, when the starting signal X5 is closed, the motor controller outputs a starting signal Y0, a coil of the contactor is driven to close a main contact and a normally open contact of the contactor, a power supply module corresponding to a motor of the vacuum pump opens a power supply, a feedback main circuit signal X2 is closed after the contactor is closed, the motor of the vacuum pump is started at the moment, and an in-operation signal Y5 of a motor unit control part is output;
after 10 seconds and 10 seconds, outputting a vacuum solenoid valve signal Y1, driving an intermediate relay coil to close a normally open contact of the intermediate relay coil, and opening the vacuum solenoid valve; if the signal Y5 is fed back to the central control part in operation, under the condition that the pressure value in the time delay set by the central control part is unchanged, the central control part considers that the motor unit control part is in failure and gives an alarm, and the starting signal X5 is cut off, so that the motor of the vacuum pump is stopped;
b. operation of each motor unit control unit on-line with each other
Step 11, under the condition that the central control part is in failure or other damages, the motor unit control part and other motor unit control parts are mutually connected to run;
when the system is powered on, the motor circuit breaker receives a closing signal X3 to be closed, the system is in a standby state, an online signal X4 of the central control part is disconnected, the system counts 30 seconds, and after the timing time reaches, the system belongs to an online operation mode between the motor unit control part and other motor unit control parts, and in a motor controller program of the motor unit control part, the arrangement serial numbers 1, 2, 3 and the like of the motor unit control parts are set, the serial numbers can be changed on a touch screen of a motor human-computer interface, and the system can automatically operate a 1# first motor unit control part after the delay time reaches;
after step 13 and 10 seconds, outputting a vacuum solenoid valve signal Y1, driving an intermediate relay coil to close a normally open contact of the intermediate relay coil, and opening a vacuum solenoid valve;
In the above steps, the signal names corresponding to the input contacts or the output contacts in the motor unit control section are as shown in table 2 below:
TABLE 2
| Input contact | Name of signal | Output contact | Name of signal |
| X0 | Y0 | Motor starting | |
| X1 | Y1 | Vacuum electromagnetic valve | |
| X2 | Main circuit contactor closing signal | Y2 | |
| X3 | Closing signal of motor circuit breaker | Y3 | The machine completes work |
| X4 | Central control on-line signal | Y4 | Machine ready |
| X5 | Central control starting signal | Y5 | In the operation of the machine |
| X6 | Upper limit of pressure switch | Y6 | Fault signal output |
| X7 | Lower limit of pressure switch | ||
| X10 | Next unit part on-line signal | ||
| X11 | Next cell completion signal |
In the whole electric control method, central integrated control is adopted, the automation degree is high, the central control part respectively controls the work of each motor unit control part, and under the condition that the central control part is in fault or is damaged, the motor unit control parts are connected with each other to run; when the motor unit works, the control parts of the motor units adopt a dual working mode of following operation and alternate operation, and can freely switch between a full-automatic control mode and a manual control mode, so that information is transmitted and an alarm is given in real time.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the invention, and all equivalent changes in shape, structure and principle of the invention should be covered by the protection scope of the present invention.
Claims (9)
1. The integrated medical vacuum negative pressure machine electrical control system comprises a central control part and at least two identical motor unit control parts, wherein the central control part is electrically connected with all the motor unit control parts; the method is characterized in that:
the central control part respectively controls each motor unit control part to work, or the central control part starts the mutual online operation between each motor unit control part after failure;
the central control part comprises a central controller, a switch and control power supply module, a central human-computer interface touch screen, an analog quantity A/D conversion module, a three-color lamp indication module, a manual/automatic control module and a phase sequence protection module, wherein the switch and control power supply module, the central human-computer interface touch screen, the analog quantity A/D conversion module and the three-color lamp indication module are respectively and independently connected with the central controller, the central controller controls the manual or automatic start and stop of each motor unit control part through the manual/automatic control module, and the central controller monitors the input of an alarm signal of the phase sequence or open phase protection of the main power supply through the phase sequence protection module; the central controller also follows and monitors the running state of each motor unit control part through an analog quantity A/D conversion module and a three-color lamp indicating module respectively, and performs sound-light alarm;
each motor unit control part comprises a motor controller, a power supply module for supplying power to a single vacuum pump motor, a motor protection control module for protecting the single vacuum pump motor, a load switch, a motor man-machine interface touch screen and a vacuum electromagnetic valve, wherein the motor man-machine interface touch screen and the motor controller are used for controlling the starting and stopping of the single vacuum pump motor, the opening and closing of the vacuum electromagnetic valve and the online operation of the single vacuum pump motor in the central controller and other motor unit control parts.
2. The integrated medical vacuum negative pressure machine electrical control system according to claim 1, wherein the central control portion further comprises an emergency stop module electrically connected with the central controller.
3. The integrated medical vacuum negative pressure machine electrical control system according to claim 1, wherein the central controller and the motor controller are both programmable controllers.
4. The integrated medical vacuum compressor electrical control system as claimed in claim 1, wherein the central control part is disposed in a separate and independent central control box, and the central control box is an independent box.
5. The integrated medical vacuum negative pressure machine electrical control system of claim 1, wherein the motor protection control module is a motor circuit breaker providing protection for a single vacuum pump motor.
6. The integrated medical vacuum negative pressure machine electrical control system of claim 1, wherein the power supply module is an ac contactor that provides ac power to a single vacuum pump motor.
7. The integrated medical vacuum negative pressure machine electric control system as claimed in claim 1, wherein each motor unit control part is disposed in a separate and independent motor control box, the motor control box is an independent box, and a separate and independent motor control box is added for each additional motor unit control part.
8. The integrated medical vacuum negative pressure machine electrical control system as claimed in claim 1, wherein the load switch on the motor unit control part is a pressure sensor.
9. The electrical control method of the integrated medical vacuum negative-pressure machine is characterized by comprising the following steps:
(I) control procedure of central control part
Step 1, after the system is powered on, the emergency stop module is normally closed, when an emergency situation occurs, an emergency stop button on a box body panel is pressed, the emergency stop module is disconnected, and the system and all motor unit control parts controlled by the central control part are stopped emergently;
step 2, adding a 'control relay signal' in the phase sequence protection module to a three-phase main power supply loop, monitoring the input of an alarm signal of the phase sequence or open-phase protection of the main power supply, and closing the alarm signal when a phase sequence error or open-phase occurs so as to trigger a controller to alarm;
step 3, in the manual/automatic control module, when a change-over switch 'manual/automatic switch' is turned to a 'manual' position, a single vacuum pump motor start-stop and a vacuum solenoid valve switch are manually operated on each motor unit control part on a central human-computer interface touch screen; when the change-over switch is turned to an 'automatic' position, an 'automatic operation switch' on the central human-computer interface touch screen is turned on, an emergency stop signal on the emergency stop module is not disconnected, an alarm signal of the circuit breaker is controlled not to be closed, an on-line signal between the motor unit control parts is closed, and when the alarm signal is not closed, an automatic operation program starts to be executed, a light signal is controlled to be output, and a green light in the three-color light indication module is normally on;
step 4, after the system starts to operate, when the on-line signal of the first motor unit control part is closed, a starting signal is output, the starting signal of the first motor unit control part is triggered, the vacuum pump motor is started, the first motor unit control part which receives the starting signal feeds back an 'in-operation signal' within a set delay time, the on-line signal between the central control part and the first motor unit control part is closed, if the delay time is exceeded and the feedback signal is not received, the system gives an alarm, and the current first motor unit control part is stopped until the alarm is released;
step 5, when the on-line signal of the first motor unit control part is disconnected and the on-line signal of the second motor unit control part is closed, outputting a starting signal of the second motor unit control part, triggering the starting signal of the second motor unit control part to start a vacuum pump motor of the second motor unit control part, feeding back an 'in-operation signal' by the second motor unit control part receiving the starting signal within a set delay time to close the on-line signal between the central control part and the second motor unit control part, and if the delay time is exceeded and the feedback signal is not received, alarming by the system and stopping the current second motor unit control part until the alarm is released;
step 6, when the on-line signal of the first motor unit control part and the on-line signal of the second motor unit control part are both closed, the first motor unit control part works preferentially and operates in turn with the second motor unit control part;
step 7, restarting after power failure, wherein when the system runs normally, the system runs automatically under the condition of sudden power failure and after being electrified again under the condition of no shutdown alarm signal, and current output is executed;
(II) control procedure of motor unit control part
a. On-line control between central control unit and motor unit control unit
Step 8, after the system is powered on, the motor circuit breaker receives a closing signal to close, the system is in a standby state, and an online signal between the central control part and the motor unit control part is closed;
step 9, when the starting signal is closed, the motor controller outputs the starting signal to drive the coil of the contactor to close the main contact and the normally open contact, the power supply module corresponding to the vacuum pump motor opens the power supply, the contactor closes the feedback main circuit signal after closing, and the vacuum pump motor starts at the moment and outputs the running signal of the motor unit control part;
outputting a vacuum solenoid valve signal after 10 seconds and 10 seconds, and opening the vacuum solenoid valve; if the signal is fed back to the central control part in operation, under the condition that the time delay internal pressure value set by the central control part is unchanged, the central control part considers that the motor unit control part is in failure and gives an alarm, and the starting signal is cut off to stop the motor of the vacuum pump;
b. operation of each motor unit control unit on-line with each other
Step 11, under the condition that the central control part is in failure or other damages, the motor unit control part and other motor unit control parts are mutually connected to run;
when the system is powered on, the motor circuit breaker receives a closing signal to close, the system is in a standby state, an online signal X4 of the central control part is disconnected, the system counts time for 30 seconds, the system belongs to an online operation mode between the motor unit control part and other motor unit control parts after the timing time is up, and the system automatically operates the first motor unit control part after the delay time is up;
step 12, the pressure sensor outputs an upper limit switching value and a lower limit switching value to a motor controller of each motor unit control part; when the pressure lower limit switch is closed, the motor controller outputs a motor starting signal, a power supply of a vacuum pump motor is opened, a main circuit closing signal is fed back to the motor controller, the vacuum pump motor is started, and a running signal is output;
step 13, outputting a vacuum solenoid valve signal after 10 seconds, and opening the vacuum solenoid valve;
step 14, when the upper pressure limit switch is closed, the motor controller stops outputting a motor starting signal and a motor running signal, a vacuum pump motor and a vacuum solenoid valve power supply are disconnected, and a work completion signal of the motor unit control part is output to the next motor unit control part, and at the moment, the system is in a standby state;
step 15, after the next motor unit control part receives the completion signal of the previous motor unit control part, when the pressure is reduced and the pressure lower limit switch is closed again, the next motor unit control part executes the same control flow, and only when the pressure upper limit switch is closed and stopped, the completion signal is output to the previous motor unit control part; by circulating in this way, each vacuum pump motor controlled by each motor unit control part can work in turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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