CN2322022Y - Light type cathode protective instrument - Google Patents
Light type cathode protective instrument Download PDFInfo
- Publication number
- CN2322022Y CN2322022Y CN 97250414 CN97250414U CN2322022Y CN 2322022 Y CN2322022 Y CN 2322022Y CN 97250414 CN97250414 CN 97250414 CN 97250414 U CN97250414 U CN 97250414U CN 2322022 Y CN2322022 Y CN 2322022Y
- Authority
- CN
- China
- Prior art keywords
- amplifier
- magnetic amplifier
- winding
- output
- input end
- 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
Links
Images
Landscapes
- Prevention Of Electric Corrosion (AREA)
Abstract
This device is a light type cathode protective instrument which belongs to a device for protecting metal and anti-corrosion of metal. The structure of the device comprises a magnetic amplifier and a controlling circuit. The secondary winding of the magnetic amplifier is connected with the controlling circuit. The primary winding of the magnetic amplifier is cascaded with the low grade of the transformer and a bridge rectifier at the same time. The rectified output is catelectrode and anode which are directly connected with the equipment. The controlling circuit is connected with the controlling winding. The current size of the controlling winding of the magnetic amplifier can be adjusted to change the size of output current. The utility model has the advantages that the structure is simple; the volume is small; the weight is light; the active zone is broad; the adjustment is flexible; work can be stable and reliable.
Description
The utility model is a kind of anti-corrosion of metal device, is applicable to the cathodic protection of various metallic facilities in underground oil and gas pipeline, aqueduct, oil well casing and underground, the water.
Present cathodic protection equipment volume is huge; heavy; using needs special room to place and special messenger's maintenance; past is owing to use controllable silicon to regulate as output; at the little protective current occasion job insecurity of needs; be afraid of overcurrent again when the big electric current of output, so circuit such as various protective measures of Pei Heing and trigger road is miscellaneous with it, rate of fault improves relatively.
For solving the deficiency of above protection instrument, the purpose of this utility model provides a kind of handy type cathodic protection instrument, and the magnetic amplifier that utilizes annular core is as the output regulating element, and is little to reach volume, working stability, the purpose that operating range is big.
Structural design of the present utility model is achieved in that its structure of handy type cathodic protection instrument is made up of magnetic amplifier and control circuit two-part; it is that the power transformer secondary windings is connected in series mutually with the simple winding of magnetic amplifier that base connects; simultaneously; inter-burst is connected to bridge rectifier; the magnetic amplifier secondary windings is a magnetic amplifier control winding; join with control circuit; magnetic amplifier control winding one end and control circuit output terminal join; the other end is a ground level; the control circuit input end is two the tunnel; one the tunnel connects reference electrode, and another road connects the moon (as shown in Figure 2) for other position, and reference electrode meets amplifier IC through filter resistance
1(LM224) input end, the amplifier the other end connects the output terminal of amplifier itself, amplifier IC for locking end
1Output terminal connects amplifier IC
2(LM224) a input end, the other end input end selects with measurement and temperature-compensation circuit joins amplifier IC
2Output amplify the back through diode ﹠ transistor and control winding with magnetic amplifier and join, magnetic amplifier winding the other end ground connection is with amplifier IC
2It is to certain portions, by reference diode LM336 (Q that one input end connects
1) and diode D
3And D
4, potentiometer W
1, resistance R
1Form D
3And D
4Be used for the reference potential of LM336 output is carried out temperature correction; the formation temperature coefficient approaches zero reference potential; the control accuracy of assurance system; the anodal output of the bridge rectifier of serial connection is anode after LC filtering in the middle of the magnetic amplifier winding; the other end is output as negative electrode; directly and protection equipment join, between the two poles of the earth and be connected to piezoresistance.
Advantage of the present utility model: cathodic protection adopts the magnetic amplifier of annular core as the output regulating element, is not afraid of excess current, and the protective current adjusting of can starting from scratch; because it need not various protective circuits and trigger circuit, circuit is simple, and volume is little; in light weight, working stability is reliable.
Structure of the present utility model and working principle are provided by following examples and accompanying drawing.
Fig. 1 is a handy type cathodic protection instrument theory diagram;
Fig. 2 is a handy type cathodic protection instrument control circuit electrical schematic diagram.
Its structure is by Fig. 1; shown in 2; working principle: instrument uses magnetic amplifier as the adjusting to output current and output voltage; the protection potential (or protective current) that instrument gives protected metallic facility passes through the control winding that control amplifier feeds back to magnetic amplifier; thereby reach the purpose of constant protection potential (or protective current); as seen from the figure; give bridge rectifier again after the AC Windings series connection of Secondary winding of transformer and magnetic amplifier and carry out rectification output; regulate the size of current of the control winding of magnetic amplifier; can change the AC impedance of magnetic amplifier AC Windings; with control rectifier output voltage; such as; when power supply fluctuation or extraneous some factor cause electric current to increase; remove to control magnetic amplifier control winding after then the protection potential signal (or protective current signal) that thereupon changes amplifies through control amplifier; its electric current winding impedance is increased; reduce output voltage; it is constant finally to keep protection potential (or protective current); rectifier rectification is after export after the LC filtering, to reduce output ripple.
Claims (3)
1. handy type cathodic protection instrument; it is characterized in that this protection instrument is by being made up of magnetic amplifier and control circuit two-part; it is that the power transformer secondary windings is connected in series mutually with the simple winding of magnetic amplifier that base connects; simultaneously; inter-burst is connected to bridge rectifier; the magnetic amplifier secondary windings is a magnetic amplifier control winding; join with control circuit; magnetic amplifier control winding one end and control circuit output terminal join; the other end is a ground level, and the control circuit input end is two the tunnel, the one tunnel to connect reference electrode; another road connects the moon for other position, and reference electrode meets amplifier IC through filter resistance
1(LM224) input end, the amplifier the other end connects the output terminal of amplifier itself, amplifier IC for locking end
1Output terminal connects amplifier IC
2One input end of (LM 224), the other end input end selects with measurement and temperature-compensation circuit joins amplifier IC
2Output amplify the back through diode ﹠ transistor and control winding with magnetic amplifier and join magnetic amplifier winding the other end ground connection.
2. by the described protection instrument of claim 1, it is characterized in that the anodal output of bridge rectifier of serial connection is anode after LC filtering in the middle of the magnetic amplifier winding, the other end is output as negative electrode, and direct and protection equipment joins, between the two poles of the earth and be connected to piezoresistance.
3. by the described protection instrument of claim 1, it is characterized in that and amplifier IC
2It is to certain portions, by reference diode LM336 (Q that one input end connects
1) and diode D
3And D
4, potentiometer W
1, resistance R
1Form D
3And D
4Be used for the reference potential of LM336 output is carried out temperature correction, the formation temperature coefficient approaches zero reference potential, guarantees the control accuracy of system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97250414 CN2322022Y (en) | 1997-08-12 | 1997-08-12 | Light type cathode protective instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97250414 CN2322022Y (en) | 1997-08-12 | 1997-08-12 | Light type cathode protective instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2322022Y true CN2322022Y (en) | 1999-06-02 |
Family
ID=33957012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97250414 Expired - Fee Related CN2322022Y (en) | 1997-08-12 | 1997-08-12 | Light type cathode protective instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2322022Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207458A (en) * | 2014-06-12 | 2015-12-30 | Abb技术有限公司 | Converter arrangement |
-
1997
- 1997-08-12 CN CN 97250414 patent/CN2322022Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207458A (en) * | 2014-06-12 | 2015-12-30 | Abb技术有限公司 | Converter arrangement |
| CN105207458B (en) * | 2014-06-12 | 2018-03-13 | Abb技术有限公司 | converter device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205725091U (en) | Vehicle charger | |
| CN203057635U (en) | Energy-saving multi-path adjustable LED street lamp constant-current driving power supply | |
| CN108899978B (en) | High-reliability large-working-range induction energy-taking device based on adjustable impedance and regulation and control method | |
| CN1738148A (en) | Battery charger | |
| CN101728876B (en) | Non-contact inductive electricity-getting device for electric tunnel cable | |
| CN2322022Y (en) | Light type cathode protective instrument | |
| CN109842183B (en) | Induction power taking device of power transmission line and method for obtaining maximum power of induction power taking device | |
| CN2833988Y (en) | Battery charger | |
| CN104319910A (en) | Power source energy taking circuit based on high-voltage power transmission line | |
| CN201774324U (en) | High voltage side mutual-inductance energy tanking device of high-voltage transmission line | |
| CN205960779U (en) | P type monitoring formula switching power | |
| CN214479854U (en) | Circuit energy taking device based on flexible switch | |
| CN201656574U (en) | Non-contact induction power-taking device of power tunnel cable | |
| CN205583685U (en) | Profit well casing anticorrosion appearance pulsewidth modulation direct current system | |
| CN208272843U (en) | A kind of charger constant voltage constant current power | |
| CN2458815Y (en) | High-stability high-power controllable rectifying current stabilized power source | |
| CN205666632U (en) | Overhead line fault indicator's induction electricity -taking system | |
| CN205864041U (en) | Solar photovoltaic control system | |
| CN2214010Y (en) | Separation protection regulated power supply | |
| CN206908530U (en) | A kind of integral type emergency power supply inverter | |
| CN205657585U (en) | Protection circuit to induction heating power direct current major loop | |
| CN216774279U (en) | Underground filling pipeline parameter monitoring power supply protection circuit | |
| CN219247525U (en) | Low-loss charging circuit | |
| CN206302332U (en) | A kind of constant voltage power supply system and underground metalliferous detection instrument | |
| CN105305409B (en) | A kind of Casing Failure corrosion protection instrument pulsewidth modulation DC power-supply system |
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 |