CN201500508U - Under-voltage protection device - Google Patents
Under-voltage protection device Download PDFInfo
- Publication number
- CN201500508U CN201500508U CN2009202091033U CN200920209103U CN201500508U CN 201500508 U CN201500508 U CN 201500508U CN 2009202091033 U CN2009202091033 U CN 2009202091033U CN 200920209103 U CN200920209103 U CN 200920209103U CN 201500508 U CN201500508 U CN 201500508U
- Authority
- CN
- China
- Prior art keywords
- tower
- travel switch
- air inlet
- valve
- solenoid valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Drying Of Gases (AREA)
Abstract
The utility model discloses an under-voltage protection device, which comprises a PLC programmable controller, a power supply, a control key and a terminal strip. Four control signal output ends Q1, Q2. Q3 and Q4 are led out from the PLC programmable controller. The utility model 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 utility model relates to drying machinery equipment, especially a kind of no-voltage protection device that is used for absorption drier.
Background technology
As shown in Figure 1, at present in the compressed air field, absorption drier in the equipment for after-treatment all is 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 magnetic valve A1, siphons away moisture content in the compressed air by the adsorbent in the 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 magnetic valve B1 in regeneration is in closed condition, and B tower exhaust solenoid valve B2 opens with atmosphere and communicates, and feeds a spot of dry air (dividing heating, no heat and low-grade fever) this moment saturated adsorbent is dried.It is to be switched to close B tower exhaust solenoid valve B2 etc. after the oven dry.Work tower A works after the certain hour (perhaps satisfying certain condition), need switch, and originally the B tower that 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, all are to move in groups, no matter close or open A1 and A2 has only 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, then just row is to atmosphere for compressed air, and system's air pressure just will sharply descend, and causes to produce to stop production.
Summary of the invention
The purpose of this utility model is to provide a kind of no-voltage protection device, guarantees that whether the absorption drier electromagnetic valve can detect the corresponding solenoid valve door in correct position when switching, and the system air pressure of avoiding just will sharply descend, and cause the generation of stopping production accident.
The purpose of this utility model is achieved in that a kind of no-voltage protection device; comprise the PLC Programmable Logic Controller; power supply; the 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 magnetic 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 magnetic 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 utlity model has following advantage: the utility model has adopted PLC Programmable Logic Controller and magnetic valve that the gas circuit of absorption drier is controlled, and has improved reliability of system operation and security.Especially between control signal output and magnetic valve, establish and put valve feedback travel switch respectively; 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 the utility model absorption drier and no-voltage protection device planar structure schematic diagram;
Fig. 2 is the utility model no-voltage protection device circuit theory schematic diagram.
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; the 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 magnetic 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 magnetic 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; the 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 magnetic 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 magnetic 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 |
|---|---|---|---|
| CN2009202091033U CN201500508U (en) | 2009-09-03 | 2009-09-03 | Under-voltage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202091033U CN201500508U (en) | 2009-09-03 | 2009-09-03 | Under-voltage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201500508U true CN201500508U (en) | 2010-06-09 |
Family
ID=42451451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202091033U Expired - Fee Related CN201500508U (en) | 2009-09-03 | 2009-09-03 | Under-voltage protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201500508U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103157351A (en) * | 2011-12-09 | 2013-06-19 | 上海凯思尔电子有限公司 | Voltage-loss protection device |
-
2009
- 2009-09-03 CN CN2009202091033U patent/CN201500508U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103157351A (en) * | 2011-12-09 | 2013-06-19 | 上海凯思尔电子有限公司 | Voltage-loss protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20150903 |
|
| EXPY | Termination of patent right or utility model |