CN113204206A - PLC-based multi-test-bed extrusion type medium supply control system and method - Google Patents
PLC-based multi-test-bed extrusion type medium supply control system and method Download PDFInfo
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- CN113204206A CN113204206A CN202110450189.4A CN202110450189A CN113204206A CN 113204206 A CN113204206 A CN 113204206A CN 202110450189 A CN202110450189 A CN 202110450189A CN 113204206 A CN113204206 A CN 113204206A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1103—Special, intelligent I-O processor, also plc can only access via processor
Abstract
A PLC-based multi-test stand extrusion type medium supply control system and method can achieve local control and remote control over low-temperature containers by adding a PLC control system locally among containers, achieve local control over an extrusion supply system through a local HMI, and independently monitor container parameters. The remote control mode, through ethernet communication between each test bench and the container, state between real time monitoring container, each mutual independence between each test bench has the priority to control between the container, can effectively avoid the confusion of container control, and online state control between the container also can show in time for the operating personnel of each test bench, makes things convenient for each experiment to go on in order.
Description
Technical Field
The invention relates to a PLC-based extrusion type medium supply control system and method for a multi-test stand, and belongs to the field of low-temperature medium application.
Background
In the ground component test of the liquid rocket engine, a system for conveying the low-temperature container medium to each test stand or station according to requirements is called a medium supply system. Generally classified into a squeeze type supply system and a pump type supply system.
High-pressure gas is applied to the low-temperature container to extrude the low-temperature medium of the container to each required test bed in the extrusion type supply system, and the requirements of each test bed on the medium and the medium pressure are met. Under the normal condition, the operations of the low-temperature container include filling, pressurization, exhaust and medium feeding, and the filling is realized by controlling an electromagnetic valve, wherein the filling is to add the low-temperature medium into the low-temperature container from a low-temperature storage tank; the pressurization is to increase high-pressure gas to the low-temperature container through a gas distribution system, improve the pressure of the container and realize the supply of low-temperature medium from the low-temperature container to a test bed/station; exhausting is to remove high-pressure gas in the container; the medium inlet is a valve for opening the low-temperature container to a test bed/station and allowing the low-temperature medium to enter the test bed.
In general, a squeeze supply system supplies a medium from one low-temperature container to a plurality of test stands/stations, and since the low-temperature medium is supplied from the same low-temperature container, the pressure of the medium supplied to a certain test stand/station is consistent with that of the container, but the requirements of each test stand/station on the medium pressure and the container operation are different, so that two or more test stands/stations cannot simultaneously operate the low-temperature container.
The operations of filling, pressurizing, exhausting and medium feeding are carried out on the operation platform of each test platform/station, generally, the control electricity loading each test platform on the electromagnetic valve coil is connected in a parallel connection mode, each test platform receives the control instruction of an operator, the PLC controls the corresponding relay of each test platform, the control electricity is directly loaded on the electromagnetic valve coil of the low-temperature container, and the electromagnetic valve drives the pneumatic valve to execute corresponding operation.
However, the above control method has the following problems: the control electricity of each test stand is loaded on the solenoid valve coil in a parallel connection mode, which means that each test stand can independently control the solenoid valve, and because mutual interlocking control does not exist, and each test stand does not have a shared low-temperature container working state indication, when the solenoid valve is controlled by one test stand, if other test stand operators do not know the state of the low-temperature container, the solenoid valve of the low-temperature container can be controlled by other test stands, so that the control of the test stand is disordered, and potential safety hazards are brought. Some key parameters of the extrusion type supply system, such as container pressure, container liquid level and electromagnetic valve state, cannot be displayed to each test bed operator at the same time, the automation capacity of the system is low, and a set of independent intelligent monitoring method for monitoring the extrusion type medium supply system is not formed at present.
Disclosure of Invention
The technical problem solved by the invention is as follows: aiming at the problems of test bed control confusion, low automation capacity and lack of a system control method which are easily caused by a medium supply system under a low-temperature environment in the prior art, the system and the method for controlling the extrusion type medium supply used by a plurality of test beds based on the PLC are provided.
The technical scheme for solving the technical problems is as follows:
a PLC-based multi-test-bed use extrusion type medium supply control system comprises a container room, an industrial Ethernet and a test bed control subsystem, wherein the container room comprises a PLC core processor, an HMI local control platform and a liquid nitrogen container, and the test bed control subsystem comprises a first test bed, a second test bed and a third test bed, wherein:
the liquid nitrogen containers are subjected to container parameter monitoring and operation control among the containers through a PLC core processor, and the containers are communicated with the test bed control subsystem through an industrial Ethernet;
the PLC core processor monitors parameters of the liquid nitrogen container and monitors the running state between the containers, the control mode between the containers comprises local control and remote control, when the control mode is the local control, the PLC core processor carries out the local control on the liquid nitrogen container through the HMI local control platform and the control link between the containers, and when the control mode is the remote control, the PLC core processor carries out information interaction with any one of the test stand I, the test stand II and the test stand III to realize the remote control.
The inter-container circuit connection link specifically includes: PW1 linear power supply, Q1 breaker, CPU1 central processing unit, AI1 analog input module, DO1 digital output module, KD1 intermediate relay, KD2 intermediate relay, KD3 intermediate relay, K1 solenoid valve, K2 solenoid valve, K3 solenoid valve, P1 pressure transmitter, P2 pressure transmitter, Y1 level gauge, Y2 level gauge, the PLC core processor includes CPU1 central processing unit, AI1 analog input module, DO1 digital output module, PW1 linear power supply input end connects the commercial power, the output end connects one end of Q1 breaker, the other end of Q1 breaker connects each 24VDC consumer in the container, KD1 intermediate relay normally open contact one end connects PW1 linear power supply positive pole, the other end connects one end of K1 solenoid valve coil, the other end of K1 solenoid valve coil connects PW1 linear power supply negative pole, one end of normally open relay 2 normally open contact connects PW1 linear power supply positive pole, the other end connects K2 solenoid valve coil, the other end of a K2 electromagnetic valve coil is connected with the negative electrode of a PW1 linear power supply, one end of a normally open contact of a KD3 intermediate relay is connected with the positive electrode of the PW1 linear power supply, one end of the normally open contact of the KD3 electromagnetic valve coil is connected with one end of the K3 electromagnetic valve coil, the other end of the K3 electromagnetic valve coil is connected with the negative electrode of the PW1 linear power supply, a first output contact, a second output contact and a third output contact of a digital quantity output module DO1 are respectively connected with one end of the KD1 intermediate relay coil, the KD2 intermediate relay coil and one end of the KD3 intermediate relay coil, the KD1 intermediate relay coil, the KD2 intermediate relay coil and the PW 3 are respectively connected with the negative electrode of the PW1 linear power supply, a P1 pressure transmitter, a P2 pressure transmitter, a Y1 liquid level meter and a Y2 liquid level meter are respectively connected with four input channels of an AI1 analog quantity input module, the K1 electromagnetic valve is connected with an external medium pneumatic valve through a pipeline, the K2 electromagnetic valve is connected with an external pressurizing pneumatic valve through a pipeline, and the K3 is connected with an external exhaust valve through a pipeline.
The inter-container control valve link specifically includes: buffer gas cylinder, exhaust solenoid valve, pressure boost solenoid valve, advance the medium solenoid valve, the container relief valve, the exhaust pneumatic valve, pressure boost pneumatic valve, liquid nitrogen container, manual discharge valve, the manual medium valve that advances of entry, the manual medium valve that advances of export, total filter, the manual medium valve that advances of test bench, test bench filter, wherein:
the liquid nitrogen container is exhausted through a manual exhaust valve, medium control is performed through an inlet manual medium inlet valve and an outlet manual medium inlet valve, a high-pressure gas source in the buffer gas cylinder is respectively subjected to exhaust and pressurization control through an exhaust electromagnetic valve, a container safety valve, a pressurization electromagnetic valve and a pressurization pneumatic valve, medium control can be performed through a medium inlet electromagnetic valve, a pneumatic medium inlet valve and a main filter, the pneumatic medium inlet valve is respectively connected through a test bed manual medium inlet valve and a test bed one filter, a test bed manual medium inlet valve and a test bed two filter, a test bed three manual medium inlet valve and a test bed three filter, and remote control is performed through any one of the test bed one, the test bed two and the test bed three.
The system comprises a PLC core processor, an HMI local control platform and a test bed control subsystem, wherein the containers are arranged in a container room, and the containers are arranged in the container room.
The number of test beds of the test bed control subsystem is not less than three.
The monitoring parameters among the containers are specifically as follows:
container pressure, container liquid level, medium inlet valve state, pressurization valve state, and exhaust valve state.
A PLC-based multi-test stand extrusion type medium supply control method comprises the following steps:
(1) determining the working mode of the supply control system according to the medium supply control requirement;
the supply control system comprises a container room, an industrial Ethernet and a test bed control subsystem, wherein the container room comprises a PLC core processor, an HMI local control platform and a liquid nitrogen container, and the test bed control subsystem comprises a first test bed, a second test bed and a third test bed;
(2) if the working mode is the local control mode, entering the step (3); if the working mode is the remote control mode, entering the step (4);
(3) controlling a control valve link between containers through an HMI local control platform, controlling the containers to perform air exhaust, pressurization and medium inlet operations, and forbidding a first test bed, a second test bed and a third test bed to control the control valve link;
(4) any test bed is selected from the first test bed, the second test bed and the third test bed, the control valve link is controlled to perform air exhaust, pressurization and medium inlet operations, and when any test bed works, other test beds cannot perform simultaneous control.
In the supply control system, container parameters of liquid nitrogen containers are monitored and operation control is carried out on the liquid nitrogen containers through a PLC (programmable logic controller) core processor between the containers, and the containers are communicated with the test bed control subsystem through an industrial Ethernet;
the PLC core processor monitors parameters of the liquid nitrogen container and monitors the running state between the containers, the control mode between the containers comprises local control and remote control, when the control mode is the local control, the PLC core processor carries out the local control on the liquid nitrogen container through the HMI local control platform and the control link between the containers, and when the control mode is the remote control, the PLC core processor carries out information interaction with any one of the test stand I, the test stand II and the test stand III to realize the remote control.
The inter-container control valve link specifically includes: buffer gas cylinder, exhaust solenoid valve, pressure boost solenoid valve, advance the medium solenoid valve, the container relief valve, the exhaust pneumatic valve, pressure boost pneumatic valve, liquid nitrogen container, manual discharge valve, the manual medium valve that advances of entry, the manual medium valve that advances of export, total filter, the manual medium valve that advances of test bench, test bench filter, wherein:
the liquid nitrogen container is exhausted through a manual exhaust valve, medium control is performed through an inlet manual medium inlet valve and an outlet manual medium inlet valve, a high-pressure gas source in the buffer gas cylinder is respectively subjected to exhaust and pressurization control through an exhaust electromagnetic valve, a container safety valve, a pressurization electromagnetic valve and a pressurization pneumatic valve, medium control can be performed through a medium inlet electromagnetic valve, a pneumatic medium inlet valve and a main filter, the pneumatic medium inlet valve is respectively connected through a test bed manual medium inlet valve and a test bed one filter, a test bed manual medium inlet valve and a test bed two filter, a test bed three manual medium inlet valve and a test bed three filter, and remote control is performed through any one of the test bed one, the test bed two and the test bed three.
Compared with the prior art, the invention has the advantages that:
according to the PLC-based multi-test-bed extrusion type medium supply control system and method, related parameters of the low-temperature container can be monitored through the control system mainly based on the PLC core processor, local control and remote control over the low-temperature container can be achieved, local control over the extrusion supply system can be achieved through the local HMI, and container parameters can be monitored independently. The remote control mode, through ethernet communication between each test bench and the container, state between real time monitoring container, each mutual independence between each test bench has the priority to control between the container, can effectively avoid the confusion of container control, and online state control between the container also can show in time for the operating personnel of each test bench, makes things convenient for each experiment to go on in order.
Drawings
FIG. 1 is a schematic diagram of a prior art media supply control system provided by the present invention;
FIG. 2 is a schematic diagram of a PLC-based multiple test stand use extrusion media supply control system provided by the present invention;
fig. 3 is a schematic diagram of an electrical connection link between containers of an extruded media supply control system provided by the present invention;
FIG. 4 is a schematic view of an inter-container control valve piping link for an extruded media supply control system provided by the present invention;
FIG. 5 is an HMI local control platform control interface provided by the present invention;
Detailed Description
A PLC-based multi-test stand extrusion type medium supply control system and method can achieve local control and remote control over low-temperature containers by adding a PLC control system locally among containers, achieve local control over an extrusion supply system through a local HMI, and independently monitor container parameters. Remote control mode, through ethernet communication between each test bench and container, state between real time monitoring container, mutual independence between each test bench has the priority to control between the container, can effectively avoid the confusion of container control, and the on-line state control between the container also can show in time for the operating personnel of each test bench, makes things convenient for each experiment to go on in order, and control system mainly includes:
between the container, industry ethernet, test bench control subsystem, including PLC, HMI local control platform, liquid nitrogen container between the container, test bench control subsystem includes test bench one, test bench two, test bench three, wherein:
the liquid nitrogen containers are subjected to container parameter monitoring and operation control through the PLC among the containers, and the containers are communicated with the test bed control subsystem through the industrial Ethernet;
the PLC monitors parameters of the liquid nitrogen container and monitors the running state among the containers, the control mode among the containers comprises local control and remote control, when the control mode is the local control, the PLC controls the liquid nitrogen container locally through an HMI local control platform and a control link among the containers, and when the control mode is the remote control, the PLC interacts information with any test bed of a test bed I, a test bed II and a test bed III to realize the remote control;
wherein, circuit connection link specifically includes between the container: PW1 linear power supply, Q1 circuit breaker, CPU1 central processing unit, AI1 analog input module, DO1 digital output module, KD1 intermediate relay, KD2 intermediate relay, KD3 intermediate relay, K1 electromagnetic valve, K2 electromagnetic valve, K3 electromagnetic valve, P1 pressure transmitter, P2 pressure transmitter, Y1 liquid level meter, Y2 liquid level meter, PLC includes CPU1 central processing unit, AI1 analog input module, DO1 digital output module, PW1 linear power supply input end is connected with commercial power, output end is connected with one end of Q1 circuit breaker, Q1 circuit breaker other end is connected with each 24VDC electric appliance in the container, KD1 intermediate relay normally open contact one end is connected with PW1 linear power supply positive pole, the other end is connected with one end of K1 electromagnetic valve coil, the other end of K1 electromagnetic valve coil is connected with PW1 linear power supply, KD2 intermediate relay normally open contact one end is connected with PW1 linear power supply positive pole, the other end is connected with K2 coil, the other end of a K2 electromagnetic valve coil is connected with the negative electrode of a PW1 linear power supply, one end of a normally open contact of a KD3 intermediate relay is connected with the positive electrode of the PW1 linear power supply, one end of the normally open contact of the KD3 electromagnetic valve coil is connected with one end of the K3 electromagnetic valve coil, the other end of the K3 electromagnetic valve coil is connected with the negative electrode of the PW1 linear power supply, a first output contact, a second output contact and a third output contact of a digital quantity output module DO1 are respectively connected with one end of the KD1 intermediate relay coil, KD2 intermediate relay coil and KD3 intermediate relay coil, the other ends of the KD1 intermediate relay coil, the KD2 intermediate relay coil and the KD3 PW 83 linear power supply are respectively connected with the negative electrode of the PW1 linear power supply, a P1 pressure transmitter, a P2 pressure transmitter, a Y1 liquid level meter and a Y2 liquid level meter are respectively connected with four input channels of an AI1 analog quantity input module, the K1 electromagnetic valve is connected with an external medium pneumatic valve through a pipeline, the K2 electromagnetic valve is connected with an external pressurizing valve through a pipeline, and the K3 electromagnetic valve is connected with an external exhaust pneumatic valve through a pipeline.
The inter-container control valve pipeline link specifically comprises: buffer gas cylinder, exhaust solenoid valve, pressure boost solenoid valve, advance the medium solenoid valve, the container relief valve, the exhaust pneumatic valve, pressure boost pneumatic valve, liquid nitrogen container, manual discharge valve, the manual medium valve that advances of entry, the manual medium valve that advances of export, total filter, the manual medium valve that advances of test bench, test bench filter, wherein:
the liquid nitrogen container is exhausted through a manual exhaust valve, medium control is performed through an inlet manual medium inlet valve and an outlet manual medium inlet valve, a high-pressure gas source in the buffer gas cylinder respectively achieves exhaust and pressurization control through an exhaust solenoid valve, a container safety valve, a pressurization solenoid valve and a pressurization pneumatic valve, medium control can be performed through a medium inlet solenoid valve, a pneumatic medium inlet valve and a main filter, the pneumatic medium inlet valve is respectively connected through a test bed manual medium inlet valve and a test bed one filter, a test bed manual medium inlet valve and a test bed two filter, a test bed three manual medium inlet valve and a test bed three filter, and remote control is performed through any one of the test bed one, the test bed two and the test bed three.
The system comprises a plurality of containers, a local control platform, a test bed control subsystem, a PLC (programmable logic controller), an HMI (human machine interface) local control platform, a test bed control subsystem and a switch, wherein the number of test beds of the test bed control subsystem is not less than three, the switch is selected from the three containers, and monitoring parameters among the containers comprise specific parameters such as container pressure, container liquid level, medium inlet valve state, pressurization valve state and exhaust valve state.
According to the supply control system, a PLC-based multi-test-bed extrusion type medium supply control method is provided, and the method comprises the following specific steps:
(1) determining the working mode of the supply control system according to the medium supply control requirement;
(2) if the working mode is the local control mode, entering the step (3); if the working mode is the remote control mode, entering the step (4);
(3) controlling a control valve link between containers through an HMI local control platform, controlling the containers to perform air exhaust, pressurization and medium inlet operations, and forbidding a first test bed, a second test bed and a third test bed to control the control valve link;
(4) any test bed is selected from the first test bed, the second test bed and the third test bed, the control valve link is controlled to perform air exhaust, pressurization and medium inlet operations, and when any test bed works, other test beds cannot perform simultaneous control.
In the control flow, the control is realized based on the system structure, the circuit connection link among the containers and the control valve link among the containers mentioned in the control system.
The following is further illustrated with reference to specific examples:
in this embodiment, as shown in fig. 1 in the prior art, control is mainly performed by a solenoid valve coil, and as shown in fig. 2, a control system provided by the present invention includes a local control mode and a remote control mode, controls a control valve link between containers by different main bodies, and cooperates with a circuit connection link between containers to realize local control of an HMI or remote control of any test stand in a control process, where:
under the local control mode, the operation of operators is completed between the low-temperature containers locally; and under a remote control mode, the operation of the low-temperature container is realized on each test bed. If the media supply system needs to be controlled locally between each test bed and the container, the control right needs to be acquired firstly, the control right can only be occupied by one test bed, if a certain test bed acquires the control right of the media supply system, the test bed can carry out relevant operation on the media supply system, other test beds do not have the right to control the media supply system, the test bed is required to return the control right after the operation is finished, and the media supply system is convenient for other subsequent test beds to use. Wherein, the local control mode among the containers has the highest control right, and the control right of the medium supply system can be preferentially acquired; in the remote mode, other test stands obtain the priority of the control right, and are in the same priority with each other.
The circuit connection link between the containers is shown in fig. 3, and the system adopts a PLC as a core processor and communicates with each test bed control system through an ethernet network. The system mainly comprises a PW1 linear power supply (220VAC-24VDV), a Q1 breaker, a CP1 HMI, a CPU1 central processing unit, an AI1 analog input module, a DO1 digital output module, a KD1 intermediate relay, a KD2 intermediate relay, a KD3 intermediate relay, a K1 electromagnetic valve, a K2 electromagnetic valve, a K3 electromagnetic valve, a P1 pressure transmitter, a P2 pressure transmitter, a Y1 liquid level meter and a Y2 liquid level meter. The PLC consists of a CPU1 central processing unit, an AI1 analog quantity input module and a DO1 digital quantity output module, wherein the input end of a PW1 linear power supply is connected with a mains supply, the output end of the PW1 linear power supply is connected with a Q1 circuit breaker, the input end of the PW1 linear power supply is 220VAC, the output end of the PW1 linear power supply is 24VDC, L + is the anode of the power supply, M is the cathode of the power supply, and the other end of the Q1 circuit breaker is connected with each 24VDC electric device. One end of a normally open contact of the KD1 intermediate relay is connected with a PW1 linear power supply L +, the other end of the normally open contact is connected with a coil of a K1 electromagnetic valve, and the other end of the coil of the K1 electromagnetic valve is connected with M of a PW1 linear power supply; one end of a normally open contact of the KD2 intermediate relay is connected with a PW1 linear power supply L +, the other end of the normally open contact is connected with a coil of a K2 electromagnetic valve, and the other end of the coil of the K2 electromagnetic valve is connected with M of a PW1 linear power supply; one end of a normally open contact of the KD3 intermediate relay is connected with a PW1 linear power supply L +, the other end of the normally open contact is connected with a coil of a K3 electromagnetic valve, and the other end of the coil of the K3 electromagnetic valve is connected with M of a PW1 linear power supply. The first output contact of the PLC digital output module DO1 is connected with one end of a KD1 intermediate relay coil, the other end of the KD1 intermediate relay coil is connected with M of a PW1 linear power supply, and KD2 and KD3 are connected in such a way. The device comprises a P1 pressure transmitter, a P2 pressure transmitter, a Y1 liquid level meter and a Y2 liquid level meter, wherein the Y2 liquid level meter is respectively connected with four input channels of an AI1 analog quantity input module, a K1 electromagnetic valve is connected with a medium inlet pneumatic valve through a pipeline, a K2 electromagnetic valve is connected with a boosting pneumatic valve through a pipeline, and a K3 electromagnetic valve is connected with an exhaust pneumatic valve through a pipeline;
the control valve pipeline links among the containers are shown in figure 4, and comprise a 1-buffer gas cylinder, a 2-exhaust solenoid valve, a 3-pressurization solenoid valve, a 4-medium inlet solenoid valve, a 5-container safety valve, a 6-exhaust pneumatic valve, a 7-pressurization pneumatic valve, an 8-low-temperature container, a 9-manual exhaust valve, a 10-inlet manual medium inlet valve, a 11-outlet manual medium inlet valve, a 12-main filter, a 13-pneumatic medium inlet valve, a 14-test bed manual medium inlet valve, a 15-test bed one filter, a 16-test bed manual medium inlet valve, a 17-test bed two filter, a 18-test bed three manual medium inlet valve and a 19-test bed three filter;
if a local control mode is adopted, clicking a local control button on an HMI (human machine interface), selecting the local control mode, performing low-temperature control on a first test bed according to the current task requirement, manually closing an inlet manual medium inlet valve, a test bed manual medium inlet valve and a test bed three manual medium inlet valve, manually opening an outlet manual medium inlet valve and a test bed manual medium inlet valve, clicking a pressurizing switch on the HMI to realize the pressurizing operation of the container, clicking a pressurizing switch to stop pressurizing the container; clicking 'enter medium on' on the HMI to simultaneously ensure that the exhaust electromagnetic valve is closed, realizing the operation of entering the medium on the test bed I, clicking 'enter medium off' to stop entering the medium on the test bed I;
as shown in fig. 5, clicking "exhaust on" on HMI to realize the exhaust operation of the container, clicking "pressure boost off" to stop exhausting the container; the supply of liquid nitrogen flow and pressure of the test bed is realized through the operation of the local HMI, and all the test beds cannot operate and control the container electromagnetic valve in a local control mode, so that the local HMI has the highest control right.
Under the remote control mode, a first test bed uses a low-temperature medium, other test beds do not participate, a remote control button is clicked on an HMI (human machine interface), the remote control mode is selected, an inlet manual medium inlet valve, a test bed manual medium inlet valve and a test bed three manual medium inlet valve are manually closed, an outlet manual medium inlet valve and a test bed manual medium inlet valve are manually opened, a container button is clicked on an operation platform of the first test bed to obtain the management authority of the container, only the first test bed can carry out pressurization, exhaust and medium inlet operations, the first test bed can remotely control the low-temperature container, and the other test beds cannot carry out related operations.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Those skilled in the art will appreciate that the details of the invention not described in detail in this specification are well within the skill of those in the art.
Claims (9)
1. A PLC-based multi-test stand use extrusion type medium supply control system characterized in that: including between the container, industrial ethernet, test bench control subsystem, including PLC core processor, HMI local control platform, liquid nitrogen container between the container, test bench control subsystem includes test bench one, test bench two, test bench three, wherein:
the liquid nitrogen containers are subjected to container parameter monitoring and operation control among the containers through a PLC core processor, and the containers are communicated with the test bed control subsystem through an industrial Ethernet;
the PLC core processor monitors parameters of the liquid nitrogen container and monitors the running state between the containers, the control mode between the containers comprises local control and remote control, when the control mode is the local control, the PLC core processor carries out the local control on the liquid nitrogen container through the HMI local control platform and the control link between the containers, and when the control mode is the remote control, the PLC core processor carries out information interaction with any one of the test stand I, the test stand II and the test stand III to realize the remote control.
2. The PLC-based multi-stand use squeeze media supply control system of claim 1, wherein:
the inter-container circuit connection link specifically includes: PW1 linear power supply, Q1 breaker, CPU1 central processing unit, AI1 analog input module, DO1 digital output module, KD1 intermediate relay, KD2 intermediate relay, KD3 intermediate relay, K1 solenoid valve, K2 solenoid valve, K3 solenoid valve, P1 pressure transmitter, P2 pressure transmitter, Y1 level gauge, Y2 level gauge, the PLC core processor includes CPU1 central processing unit, AI1 analog input module, DO1 digital output module, PW1 linear power supply input end connects the commercial power, the output end connects one end of Q1 breaker, the other end of Q1 breaker connects each 24VDC consumer in the container, KD1 intermediate relay normally open contact one end connects PW1 linear power supply positive pole, the other end connects one end of K1 solenoid valve coil, the other end of K1 solenoid valve coil connects PW1 linear power supply negative pole, one end of normally open relay 2 normally open contact connects PW1 linear power supply positive pole, the other end connects K2 solenoid valve coil, the other end of a K2 electromagnetic valve coil is connected with the negative electrode of a PW1 linear power supply, one end of a normally open contact of a KD3 intermediate relay is connected with the positive electrode of the PW1 linear power supply, one end of the normally open contact of the KD3 electromagnetic valve coil is connected with one end of the K3 electromagnetic valve coil, the other end of the K3 electromagnetic valve coil is connected with the negative electrode of the PW1 linear power supply, a first output contact, a second output contact and a third output contact of a digital quantity output module DO1 are respectively connected with one end of the KD1 intermediate relay coil, the KD2 intermediate relay coil and one end of the KD3 intermediate relay coil, the KD1 intermediate relay coil, the KD2 intermediate relay coil and the PW 3 are respectively connected with the negative electrode of the PW1 linear power supply, a P1 pressure transmitter, a P2 pressure transmitter, a Y1 liquid level meter and a Y2 liquid level meter are respectively connected with four input channels of an AI1 analog quantity input module, the K1 electromagnetic valve is connected with an external medium pneumatic valve through a pipeline, the K2 electromagnetic valve is connected with an external pressurizing pneumatic valve through a pipeline, and the K3 is connected with an external exhaust valve through a pipeline.
3. The PLC-based multi-stand use squeeze media supply control system of claim 1, wherein:
the inter-container control valve link specifically includes: buffer gas cylinder, exhaust solenoid valve, pressure boost solenoid valve, advance the medium solenoid valve, the container relief valve, the exhaust pneumatic valve, pressure boost pneumatic valve, liquid nitrogen container, manual discharge valve, the manual medium valve that advances of entry, the manual medium valve that advances of export, total filter, the manual medium valve that advances of test bench, test bench filter, wherein:
the liquid nitrogen container is exhausted through a manual exhaust valve, medium control is performed through an inlet manual medium inlet valve and an outlet manual medium inlet valve, a high-pressure gas source in the buffer gas cylinder is respectively subjected to exhaust and pressurization control through an exhaust electromagnetic valve, a container safety valve, a pressurization electromagnetic valve and a pressurization pneumatic valve, medium control can be performed through a medium inlet electromagnetic valve, a pneumatic medium inlet valve and a main filter, the pneumatic medium inlet valve is respectively connected through a test bed manual medium inlet valve and a test bed one filter, a test bed manual medium inlet valve and a test bed two filter, a test bed three manual medium inlet valve and a test bed three filter, and remote control is performed through any one of the test bed one, the test bed two and the test bed three.
4. The PLC-based multi-stand use squeeze media supply control system of claim 1, wherein:
the system comprises a PLC core processor, an HMI local control platform and a test bed control subsystem, wherein the containers are arranged in a container room, and the containers are arranged in the container room.
5. The PLC-based multi-stand use squeeze media supply control system of claim 1, wherein:
the number of test beds of the test bed control subsystem is not less than three.
6. The PLC-based multi-stand use squeeze media supply control system of claim 2, wherein:
the monitoring parameters among the containers are specifically as follows:
container pressure, container liquid level, medium inlet valve state, pressurization valve state, and exhaust valve state.
7. A PLC-based multi-test stand extrusion type medium supply control method is characterized by comprising the following steps:
(1) determining the working mode of the supply control system according to the medium supply control requirement;
the supply control system comprises a container room, an industrial Ethernet and a test bed control subsystem, wherein the container room comprises a PLC core processor, an HMI local control platform and a liquid nitrogen container, and the test bed control subsystem comprises a first test bed, a second test bed and a third test bed;
(2) if the working mode is the local control mode, entering the step (3); if the working mode is the remote control mode, entering the step (4);
(3) controlling a control valve link between containers through an HMI local control platform, controlling the containers to perform air exhaust, pressurization and medium inlet operations, and forbidding a first test bed, a second test bed and a third test bed to control the control valve link;
(4) any test bed is selected from the first test bed, the second test bed and the third test bed, the control valve link is controlled to perform air exhaust, pressurization and medium inlet operations, and when any test bed works, other test beds cannot perform simultaneous control.
8. The PLC-based multi-stand use extrusion medium supply control method according to claim 7, characterized in that:
in the supply control system, container parameters of liquid nitrogen containers are monitored and operation control is carried out on the liquid nitrogen containers through a PLC (programmable logic controller) core processor between the containers, and the containers are communicated with the test bed control subsystem through an industrial Ethernet;
the PLC core processor monitors parameters of the liquid nitrogen container and monitors the running state between the containers, the control mode between the containers comprises local control and remote control, when the control mode is the local control, the PLC core processor carries out the local control on the liquid nitrogen container through the HMI local control platform and the control link between the containers, and when the control mode is the remote control, the PLC core processor carries out information interaction with any one of the test stand I, the test stand II and the test stand III to realize the remote control.
9. The PLC-based multi-stand use extrusion medium supply control method according to claim 7, characterized in that:
the inter-container control valve link specifically includes: buffer gas cylinder, exhaust solenoid valve, pressure boost solenoid valve, advance the medium solenoid valve, the container relief valve, the exhaust pneumatic valve, pressure boost pneumatic valve, liquid nitrogen container, manual discharge valve, the manual medium valve that advances of entry, the manual medium valve that advances of export, total filter, the manual medium valve that advances of test bench, test bench filter, wherein:
the liquid nitrogen container is exhausted through a manual exhaust valve, medium control is performed through an inlet manual medium inlet valve and an outlet manual medium inlet valve, a high-pressure gas source in the buffer gas cylinder is respectively subjected to exhaust and pressurization control through an exhaust electromagnetic valve, a container safety valve, a pressurization electromagnetic valve and a pressurization pneumatic valve, medium control can be performed through a medium inlet electromagnetic valve, a pneumatic medium inlet valve and a main filter, the pneumatic medium inlet valve is respectively connected through a test bed manual medium inlet valve and a test bed one filter, a test bed manual medium inlet valve and a test bed two filter, a test bed three manual medium inlet valve and a test bed three filter, and remote control is performed through any one of the test bed one, the test bed two and the test bed three.
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