CN202735771U - Oxygen pipeline control system switching device - Google Patents
Oxygen pipeline control system switching device Download PDFInfo
- Publication number
- CN202735771U CN202735771U CN 201220380348 CN201220380348U CN202735771U CN 202735771 U CN202735771 U CN 202735771U CN 201220380348 CN201220380348 CN 201220380348 CN 201220380348 U CN201220380348 U CN 201220380348U CN 202735771 U CN202735771 U CN 202735771U
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- plc control
- relay
- control systems
- output module
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Abstract
An oxygen pipeline control system switching device belongs to the automatic control technology field. The device comprises a relay, a pressure transmitter, Two adjusting valves and two sets of PLC control systems. A signal line of the pressure transmitter is connected with a common contact of the relay, a digital quantity output module of the first set of PLC control systems is connected with a relay coil, an analog quantity input module of the first set of PLC control systems is connected with a normally open contact of the relay; <{EN7}>an analog quantity output module of the first set of PLC control systems is connected with a main pipeline adjusting valve, an analog quantity input module of the second set of PLC control systems is connected with a normally closed contact of the relay; and an analog quantity output module of the second set of PLC control systems is connected with an adjusting valve of a bypass pipeline. When the first set of control systems break down, the device can be rapidly, timely and accurately switched to the second set of control systems, oxygen can be ceaselessly provided to a flame cutting machine, redundancy effects can be realized, and smooth production can be guaranteed.
Description
Technical field
The utility model belongs to the automatic control technology field, and a kind of oxygen pipeline control system switching device shifter particularly is provided, and utilizes relay to automatically switch between two cover control system, realizes the redundancy of control system.
Background technology
Flame cutting system is by flame cutting machine product to be cut into the identical slab of length in process of production, and the continuous casting torch-cutting machine principle is to utilize slab to follow oxygen to issue biochemical reaction at the environment of high temperature, thereby strand is cut.This system is divided into first set control system and the second cover control system, and the first set control system comprises 1, the 2# casting machine, and the second cover control system comprises 3, the 4# casting machine.Four casting machines are equipped with eight flame cutting machines, and the oxygen of these eight flame cutting machines derives from same oxygen channel, shares same oxygen regulating valve.The control program of this oxygen regulating valve and power supply all come from first set PLC control system.Whether the normal operation of this cutting oxygen variable valve plays an important role to the normal production of continuous casting workshop, in case the maintenance of first set PLC control system or PLC control system break down and will cause the stopping production of whole production continuous casting workshop, even cause the stopping production of full factory.
Summary of the invention
The purpose of this utility model is to provide oxygen pipeline control system switching device shifter, utilize relay to automatically switch two kinds of control system, effectively restrained the problem that when the first set control system breaks down or overhauls, causes the stopping production of whole continuous casting workshop, improve the production efficiency of continuous casting workshop, realized the redundancy of control system.
Principle of work of the present utility model is: utilize often opening from the function of normally closed contact of relay that same pressure unit detection signal is entered different control system under different situations, realize the automatic switchover of two cover control system, final safe, stable, the automatic control that do not stop air feed that realizes oxygen pipeline, the redundancy of realization control system.
The utility model comprises a relay, a pressure unit, two variable valve, two cover PLC control system.The signal wire of pressure unit is succeeded the common of electrical equipment, and the digital output module of first set PLC control system connects relay coil, and the analog input module of first set PLC control system is succeeded the electrical equipment normally opened contact.The analog output module of first set PLC control system connects the main line variable valve, and the analog input module of the second cover PLC control system is succeeded the normally closed contact of electrical equipment, and the analog output module of the second cover PLC control system connects the variable valve of bypass conduit.
When first set PLC control system works, digital output module by this system is powered to relay coil, at this moment, the normally opened contact of relay is closed, normally closed contact is opened, oxygen hose transmitter pressure signal enters in the first set PLC control system by the contact of closure, and first set PLC control system is carried out computing by the feedback of this signal, carries out the PID adjusting control of main line variable valve by the analog output module of system own.
When first set PLC control system fault or maintenance power failure, the relay coil power supply is lost, at this moment, oxygen hose pressure unit signal enters the second cover PLC control system by the normally closed contact of relay, the second cover PLC control system is carried out computing by the feedback of this signal, carries out the PID adjusting control of bypass line variable valve by the analog output module of system own.
The benefit of this method is that no matter whether the work of first set control system is normal, can guarantee that all oxygen pipeline has enough, an amount of oxygen for flame cutting machine, realizes the redundancy of control system, guarantees to produce effectively, carry out smoothly.Realized when the first set control system breaks down, can switch to fast, in time, accurately the second cover control system
Description of drawings
Fig. 1 is the schematic diagram of oxygen pipeline control system switching device shifter.Wherein, oxygen hose main line variable valve 1, oxygen bypass conduit variable valve 2, first set PLC control system digital output module 3, pressure unit 4, relay coil 5, relay common (just connecing pressure signal) 6, relay common (it is negative to connect pressure signal) 7, relay normally open contact (connecing the analog input module positive signal of first set control system) 8, relay normally open contact (connecing the analog input module negative signal of the second cover control system) 9, relay normally closed contact (connecing the analog input module positive signal of the second cover control system) 10, relay normally closed contact (connecing the analog input module negative signal of the second cover control system) 11, first set PLC Control system simulation amount load module 12, first set PLC Control system simulation amount output module 13, the second cover PLC Control system simulation amount load module 14, the second cover PLC Control system simulation amount output module 14.
Embodiment
The utility model comprises a relay, a pressure unit, two variable valve, two cover PLC control system.The device coil 4 that continues connects the digital output module 3 of first set PLC control system; The positive signal line of pressure unit 4 is succeeded the common 6 of electrical equipment; The negative signal line of pressure unit 4 is succeeded the common 7 of electrical equipment; The normally opened contact 8,9 of relay is connect the analog input module 12 of first set control system; The analog output module 13 of first set PLC control system is connect the variable valve 1 of main line; The normally closed contact 10,11 of relay is connect the analog input module 14 of the second cover PLC control system; The analog output module 15 of the second cover PLC control system connects the variable valve 2 of oxygen bypass conduit.
Claims (1)
1. an oxygen pipeline control system switching device shifter is characterised in that, comprises a relay, a pressure unit, two variable valve, two cover PLC control system; The signal wire of pressure unit is succeeded the common of electrical equipment, and the digital output module of first set PLC control system connects relay coil, and the analog input module of first set PLC control system is succeeded the electrical equipment normally opened contact; The analog output module of first set PLC control system connects the main line variable valve, and the analog input module of the second cover PLC control system is succeeded the normally closed contact of electrical equipment, and the analog output module of the second cover PLC control system connects the variable valve of bypass conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380348 CN202735771U (en) | 2012-08-01 | 2012-08-01 | Oxygen pipeline control system switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380348 CN202735771U (en) | 2012-08-01 | 2012-08-01 | Oxygen pipeline control system switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202735771U true CN202735771U (en) | 2013-02-13 |
Family
ID=47661456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220380348 Expired - Lifetime CN202735771U (en) | 2012-08-01 | 2012-08-01 | Oxygen pipeline control system switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202735771U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114625055A (en) * | 2022-04-15 | 2022-06-14 | 山东莱钢永锋钢铁有限公司 | Redundancy control method of flame cutting system of continuous casting machine |
-
2012
- 2012-08-01 CN CN 201220380348 patent/CN202735771U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114625055A (en) * | 2022-04-15 | 2022-06-14 | 山东莱钢永锋钢铁有限公司 | Redundancy control method of flame cutting system of continuous casting machine |
| CN114625055B (en) * | 2022-04-15 | 2024-03-12 | 山东莱钢永锋钢铁有限公司 | Redundancy control method of continuous casting machine flame cutting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |
|
| CX01 | Expiry of patent term |