CN2521808Y - Laser power-off water-deficient and overcurrent protection controller - Google Patents
Laser power-off water-deficient and overcurrent protection controller Download PDFInfo
- Publication number
- CN2521808Y CN2521808Y CN 01271806 CN01271806U CN2521808Y CN 2521808 Y CN2521808 Y CN 2521808Y CN 01271806 CN01271806 CN 01271806 CN 01271806 U CN01271806 U CN 01271806U CN 2521808 Y CN2521808 Y CN 2521808Y
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- China
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- water
- protection
- pin
- pin voltages
- laser
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- Expired - Fee Related
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- Semiconductor Lasers (AREA)
Abstract
The utility model relates to a water cutoff and shortage and over-current protection controller for a laser power and comprises a water tank, a circulating water path (a laser pipe is connected in the water path in series), a protection circuit, and a power circuit. The protection circuit uses an integrated circuit to form two voltage comparators. An electrode is arranged at a clearance of a water return pipe and the water surface, and contacts with the water flow. The other electrode is inserted into the water to detect whether the water flow exists or not. An over-flow signal comes from a discharge loop connected in series with the laser pipe. Tow signals are sent to a comparator for judgment. The circuits are simple, reliable and pragmatic, and are applicable for protection of a power control circuit of a carbon dioxide laser treatment instrument or other circuits with the same requirements.
Description
Technical field
This use is novel to belong to automatic protection control circuit technical field.
Background technology
Needs with water-cooled Laser Power Devices in present employed water cut-off protection produce certain pressure in the water route when being generally pressure control promptly when the water pump operate as normal, pressure switch shields.But As time goes on pressure switch sensitivity meeting reduces gradually, moreover later water route obstruction can't play a protective role this switch to switch, and overcurrent protection needs complicated in addition circuit.
Summary of the invention
The purpose of this utility model provides a kind of laser power-off water-deficient and overcurrent protection controller, its practicality simple and reliable for structure.
Technical essential of the present utility model is: protective circuit adopts a LM393 to form two voltage comparators, and one is used as the breakthrough water conservation, and another does overcurrent protection; Breakthrough water signal is taken from the sheet metal (backwater contact) that links to each other with 12V and is inserted Metallic rod in the water, and sheet metal is connected on return pipe and water surface gap, makes the water impact sheet metal, and Metallic rod links to each other with R8; Over-current signal is taken from the voltage of resistance R 3, and R3 links to each other with the negative electrode of laser by ammeter, the negativing ending grounding of high voltage source.When the water route just often, backwater stream is communicated with 12V with Metallic rod, comparator 6 pin voltages are higher than 5 pin voltages, 7 pin undertensions are so that the T2 conducting, protection relay is failure to actuate.When no current refunds water contact, or at the bottom of the water surface when Metallic rod is terminal, 6 pin voltages are lower than 5 pin voltages, 7 pin voltages are then identical with 5 pin, T2 conducting, J2 action protection; Overcurrent protection is that 3 pin voltages meet or exceed 2 pin voltages when the electric current that flows through R3 surpasses set point, and 1 pin voltage is identical with 2 pin voltages, the work of T1 conducting protection relay; In case the access of diode D5 can make protection take place, must fix a breakdown and restart power circuit and could recover normally, otherwise protection will be kept.J1, J2 normally-closed contact are serially connected in the master relay J3 control loop.
The utility model has the advantages that: practicality simple and reliable for structure can be used for CO
2The power control circuit of laser cure apparatus or other same circuit protections that requires.
Elaborate below in conjunction with embodiment and accompanying drawing.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is an electrical schematic diagram of the present utility model.
Embodiment
Referring to Fig. 1,1 is water tank, 2 is running water or other conduction cooling fluids, and 3 is circulating water pump, and 4 is water pipe, laser tube 5 is serially connected in the water route, leave the gap between the backwater mouth of pipe and the water surface, electrode 9 is in water, and electrode 6 (backwater contact) contacts at gap location and with backwater stream, 8 are backwater stream, and 7 is circuit board.Regulate the depth-adjustment joint level control height that electrode 9 inserts water.
Referring to Fig. 2, laser power-off water-deficient and overcurrent protection controller electrical schematic diagram symbol description are as follows:
Number in the figure title remarks
The B1 transformer
The rectification of D1-D4 diode bridge
V1 three terminal regulator 1,2,3 pins
L1, L2, L3, light-emitting diode reddish yellow are red
Q1 LM393 comparator 1-8 pin
The M1 ammeter
GL current signal sampling point
S1 backwater contact contact connects with+12V
The S2 Metallic rod is inserted in the water
ZI, Z2 master relay loop contact
T1, T2 NPN triode
The D5-D7 diode
R1, R3-R15 resistance
C1, C2, C3, C4 electrochemical capacitor
W1, W2 variable resistor
J1, J2 protection relay
The J3 master relay
HV Laser Power Devices positive high voltage
The Laser laser tube
Whole device is made up of+12V voltage stabilizing circuit, protective circuit, sampling and master relay.Voltage stabilizing circuit adopts a three-terminal regulator block, makes the protective circuit working stability reliable.Protective circuit adopts a LM393 to form two voltage comparators, and one is used as scarce water cut-off protection, and another does overcurrent protection.Lack the signal of cutting off the water supply and take from the sheet metal (backwater contact) that links to each other with 12V and insert Metallic rod in the water, sheet metal is connected on backwater and flows end, and Metallic rod links to each other with R8; Over-current signal is taken from the voltage of resistance R 3, and R3 links to each other with the negative electrode of laser by ammeter, the negativing ending grounding of high voltage source.When the water route just often, backwater stream is communicated with 12V with Metallic rod, comparator 6 pin voltages are higher than 5 pin voltages, 7 pin undertensions are so that the T2 conducting, protection relay is failure to actuate; When no current refunds water contact, or at the bottom of the water surface when Metallic rod is terminal, 6 pin voltages are lower than 5 pin voltages, 7 pin voltages are then identical with 5 pin, T2 conducting, J2 action protection.Regulate the water surface elevation of the depth controlled system protection of Metallic rod insertion, regulate the sensitivity of W2 may command protection.The principle of overcurrent protection is that 3 pin voltages meet or exceed 2 pin voltages when the electric current that flows through R3 surpasses set point, and 1 pin voltage is identical with 2 pin voltages, the work of T1 conducting protection relay.The value of regulating W1 or change R3 can obtain different current protections.In case the access of diode D5 can make protection take place, must fix a breakdown and restart power circuit and could recover normally, otherwise protection will be kept.J1, J2 normally-closed contact are serially connected in the master control relay J3 control loop, thereby reach the purpose of circuit protection.
Claims (1)
1, a kind of laser power-off water-deficient and overcurrent protection controller comprise water tank, circulation waterway (laser tube is connected in the water route), control circuit and power circuit; it is characterized in that the backwater mouth of pipe and the water surface leave the gap; an electrode contacts with current at gap location, and another electrode inserts in the water.The protective circuit structure of controller is: protective circuit adopts a LM393 to form two voltage comparators, and one is used as the breakthrough water conservation, and another does overcurrent protection; Breakthrough water signal is taken from the sheet metal (backwater contact) that links to each other with 12V and is inserted Metallic rod in the water, and sheet metal is connected on return pipe and water surface gap, makes the water impact sheet metal, and Metallic rod links to each other with R8; Over-current signal is taken from the voltage of resistance R 3, and R3 links to each other with the negative electrode of laser by ammeter, the negativing ending grounding of high voltage source.When the water route just often, backwater stream is communicated with 12V with Metallic rod, comparator 6 pin voltages are higher than 5 pin voltages, 7 pin undertensions are so that the T2 conducting, protection relay is failure to actuate.When no current during towards the 12V contact, or right at the bottom of the water surface in the Metallic rod end, 6 pin voltages are lower than 5 pin voltages, and 7 pin voltages are then identical with 5 pin, T2 conducting, J2 action protection; Overcurrent protection is that 3 pin voltages meet or exceed 2 pin voltages when the electric current that flows through R3 surpasses set point, and 1 pin voltage is identical with 2 pin voltages, the work of T1 conducting protection relay; In case the access of diode D5 can make protection take place, must fix a breakdown and restart power circuit and could recover normally, otherwise protection will be kept.J1, J2 normally-closed contact are serially connected in the master control relay J3 control loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01271806 CN2521808Y (en) | 2001-11-05 | 2001-11-05 | Laser power-off water-deficient and overcurrent protection controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01271806 CN2521808Y (en) | 2001-11-05 | 2001-11-05 | Laser power-off water-deficient and overcurrent protection controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2521808Y true CN2521808Y (en) | 2002-11-20 |
Family
ID=33677150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01271806 Expired - Fee Related CN2521808Y (en) | 2001-11-05 | 2001-11-05 | Laser power-off water-deficient and overcurrent protection controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2521808Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106540379A (en) * | 2016-12-27 | 2017-03-29 | 上海瑞柯恩激光技术有限公司 | The cooling fluid exchange determination methods of laser therapeutic apparatus |
| CN106989333A (en) * | 2017-05-27 | 2017-07-28 | 正安县欧尚电器有限公司 | Automatic aspirating street lamp |
-
2001
- 2001-11-05 CN CN 01271806 patent/CN2521808Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106540379A (en) * | 2016-12-27 | 2017-03-29 | 上海瑞柯恩激光技术有限公司 | The cooling fluid exchange determination methods of laser therapeutic apparatus |
| CN106989333A (en) * | 2017-05-27 | 2017-07-28 | 正安县欧尚电器有限公司 | Automatic aspirating street lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |