CN103157351A - Voltage-loss protection device - Google Patents
Voltage-loss protection device Download PDFInfo
- Publication number
- CN103157351A CN103157351A CN2011104092028A CN201110409202A CN103157351A CN 103157351 A CN103157351 A CN 103157351A CN 2011104092028 A CN2011104092028 A CN 2011104092028A CN 201110409202 A CN201110409202 A CN 201110409202A CN 103157351 A CN103157351 A CN 103157351A
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- Prior art keywords
- tower
- travel switch
- valve
- air inlet
- protection device
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Abstract
The invention discloses a voltage-loss protection device which comprises a PLC programmable controller, a power supply, a control key and a terminal strip. Four control signal output terminals Q1, Q2. Q3 and Q4 are led out from the PLC programmable controller. The voltage-loss protection device is characterized in that Q3 is connected with an A tower air inlet solenoid valve A1 by a normally open contact of an A tower exhaust valve travel switch and the terminal strip; Q4 is connected with an A tower exhaust solenoid valve A2 by a normally open contact of an A tower air inlet valve travel switch and the terminal strip; Q1 is connected with a B tower air inlet solenoid valve B1 by a normally open contact of a B tower exhaust valve travel switch and the terminal strip; and Q2 is connected with a B tower exhaust solenoid valve B2 by a normally open contact of a B tower air inlet valve travel switch and the terminal strip.
Description
Technical field
The present invention relates to drying machinery equipment, especially a kind of no-voltage protection device for absorption drier.
Background technology
As shown in Figure 1, at present in the compressed air field, absorption drier in equipment for after-treatment is all the pattern that adopts double tower to take turns to operate, i.e. regeneration of a job, such as work now is the A tower, compressed air enters tower A through A tower air inlet electromagnetic valve A1, siphons away moisture content in compressed air by the adsorbent in tower, provides dry compressed air to system.The A tower exhaust solenoid valve A2 that communicate with atmosphere this moment is in closed condition.Simultaneously the B tower air inlet electromagnetic valve B1 in regeneration is in closed condition, and B tower exhaust solenoid valve B2 opens with atmosphere and communicates, and passes into the adsorbent that a small amount of dry air (minute heating, without heat and low-grade fever) will be saturated this moment and dries.Close B tower exhaust solenoid valve B2 etc. after oven dry to be switched.Work tower A works after certain hour (perhaps satisfying certain condition), need to switch, and the B tower that originally regeneration is good switches to duty, and work tower A switches to reproduced state.
Magnetic valve A1, A2 are that one group of magnetic valve B1, B2 are one group in whole process, are all to move in groups, no matter close or open A1 and A2 only has one to open, another must guarantee to close, and B1 and B2 are in like manner.If but when opening A1 or B1, A2 or B2 do not close and put in place, compressed air is just discharged to atmosphere, and system's air pressure just will sharply descend, and causes to produce to stop production.
Summary of the invention
The object of the present invention is to provide a kind of no-voltage protection device, guarantee that whether the absorption drier electromagnetic valve can detect corresponding electromagnetic valve in correct position when switching, the system air pressure of avoiding just will sharply descend, and cause the generation of stopping production accident.
the object of the present invention is achieved like this: a kind of no-voltage protection device, comprise the PLC Programmable Logic Controller, power supply, control button, terminal row, draw four control signal output Q1 from the PLC Programmable Logic Controller, Q2, Q3 and Q4, it is characterized in that: Q3 is connected A tower air inlet electromagnetic valve A1 by A tower air bleeding valve travel switch SQ3 normally opened contact with terminal row, Q4 is connected A tower exhaust solenoid valve A2 by A tower intake valve travel switch SQ4 normally opened contact with terminal row, Q1 is connected B tower air inlet electromagnetic valve B1 by B tower air bleeding valve travel switch SQ1 normally opened contact with terminal row, Q2 is connected B tower exhaust solenoid valve B2 by B tower intake valve travel switch SQ2 normally opened contact with terminal row.
The present invention has following advantage: the present invention has adopted PLC Programmable Logic Controller and magnetic valve that the gas circuit of absorption drier is controlled, and has improved system's reliability of operation and security.Especially establish between control signal output and magnetic valve and put respectively valve feedback travel switch; make this solenoid valve controller have the beneficial effect of interlocking; adopt this no-voltage protection device, can avoid system's air pressure just will sharply descend, cause the generation of stopping production accident.
Description of drawings
Fig. 1 is absorption drier of the present invention and no-voltage protection device planar structure schematic diagram;
Fig. 2 is no-voltage protection device circuit theory schematic diagram of the present invention.
The specific embodiment
as Fig. 1, shown in Figure 2, a kind of no-voltage protection device, comprise the PLC Programmable Logic Controller, power supply, control button, terminal row, draw four control signal output Q1 from the PLC Programmable Logic Controller, Q2, Q3 and Q4, it is characterized in that: Q3 is connected A tower air inlet electromagnetic valve A1 by A tower air bleeding valve travel switch SQ3 normally opened contact with terminal row, Q4 is connected A tower exhaust solenoid valve A2 by A tower intake valve travel switch SQ4 normally opened contact with terminal row, Q1 is connected B tower air inlet electromagnetic valve B1 by B tower air bleeding valve travel switch SQ1 normally opened contact with terminal row, Q2 is connected B tower exhaust solenoid valve B2 by B tower intake valve travel switch SQ2 normally opened contact with terminal row.
Claims (1)
1. no-voltage protection device, comprise the PLC Programmable Logic Controller, power supply, control button, terminal row, draw four control signal output (Q1 from the PLC Programmable Logic Controller, Q2, Q3 and Q4), it is characterized in that: (Q3) be connected A tower air inlet electromagnetic valve (A1) with terminal row by A tower air bleeding valve travel switch (SQ3) normally opened contact, (Q4) be connected A tower exhaust solenoid valve (A2) with terminal row by A tower intake valve travel switch (SQ4) normally opened contact, (Q1) be connected B tower air inlet electromagnetic valve (B1) with terminal row by B tower air bleeding valve travel switch (SQ1) normally opened contact, (Q2) be connected B tower exhaust solenoid valve (B2) with terminal row by B tower intake valve travel switch (SQ2) normally opened contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104092028A CN103157351A (en) | 2011-12-09 | 2011-12-09 | Voltage-loss protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104092028A CN103157351A (en) | 2011-12-09 | 2011-12-09 | Voltage-loss protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103157351A true CN103157351A (en) | 2013-06-19 |
Family
ID=48581192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104092028A Pending CN103157351A (en) | 2011-12-09 | 2011-12-09 | Voltage-loss protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103157351A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201500508U (en) * | 2009-09-03 | 2010-06-09 | 上海凯思尔电子有限公司 | Under-voltage protection device |
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2011
- 2011-12-09 CN CN2011104092028A patent/CN103157351A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201500508U (en) * | 2009-09-03 | 2010-06-09 | 上海凯思尔电子有限公司 | Under-voltage protection device |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130619 |