CN2210196Y - Power supply means with inhibiting corrosion of anodic and cathodic protection - Google Patents
Power supply means with inhibiting corrosion of anodic and cathodic protection Download PDFInfo
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- CN2210196Y CN2210196Y CN 94231917 CN94231917U CN2210196Y CN 2210196 Y CN2210196 Y CN 2210196Y CN 94231917 CN94231917 CN 94231917 CN 94231917 U CN94231917 U CN 94231917U CN 2210196 Y CN2210196 Y CN 2210196Y
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Abstract
The utility model relates to a power supply means with metal anticorrosion of the cathodic protection, which is particularly suitable for the cathodic protection of a buried pipeline. The circuit of the utility model is mainly composed of a limit constant current device, a high-frequency inverter, a sine-wave generator, an output rectifier filter, an antijamming circuit, a setting circuit, a regulator circuit, a direct current power supply, etc. Because the sine-wave generator is used, harmonic waves are eliminated and the output voltage can not be distorted. The limit constant-current device is used, so the constant output currents can be ensured and the equipment can not generate the tripping phenomenon. The utility model has small size, light weight and convenient electrical distribution. A power supply of 220V or 380V can be used.
Description
The utility model relates to a kind of supply unit of anticorrosive metal of cathode protection method, is specially adapted to the cathodic protection of buried pipeline.
Present used supply unit in metal pipe line cathodic protection equipment is by shell and in the enclosure Industrial Frequency Transformer, pulse wave generator, triggering modulator are installed and are made of the internal wiring that thyristor controlled voltage regulating rectifier device etc. is formed.In this supply unit, it is to utilize the method for regulating dutycycle to regulate output voltage, current value.Because sort circuit can produce harmonic wave, the waveform of output voltage electric current is distorted, and output voltage is subjected to load effect bigger, it is unreliable to work, the frequent silicon controlled situation that burns out.This device, because complex circuit, volume is big, weight is big, should not carry, and cost is higher.
The purpose of this utility model is for a kind of metallic cathode rot-resistant supply unit is provided, this device can be exported the constant electric current, reliable working performance, operating mode is stable, and voltage is the high_frequency sine wave of standard, through rectifying and wave-filtering, the output direct current the waveform distortion phenomenon can not take place, and volume is little, in light weight, distribution is convenient.
Technical solution of the present utility model is to realize like this, a kind of cathodic protection supply unit that constitutes by shell and internal wiring, its special character is that internal wiring is made of power supply rectification filter circuit, high-frequency inverter, limit galvanostat, output rectifier filer, voltage stabilized source, direct supply, sine-wave generator, adjustment circuit, anti-jamming circuit and given circuit.Outside input power supply is delivered to input terminus f1, the f of limit galvanostat and the input terminus e of high-frequency inverter through behind the power supply rectification filter circuit by output terminal a, a1, from the output terminal V0 of voltage stabilized source, input terminus b, the b1 that the V1 output DC is pressed onto sine-wave generator, through sine-wave generator, the high_frequency sine wave electric signal of generation standard, export through high-frequency transformer B1, be sent in the high-frequency inverter, direct current is become 15-25KHZ high_frequency sine wave alternating-current.Through high-frequency transformer B2 voltage is delivered in the output rectifier filer, direct current is added in the load by the output terminal negative electrode and the anode of wave filter.Output terminal V2, the V3 of voltage stabilized source is connected with input terminus m, the m1 of adjustment circuit, direct current is input to adjusts in the circuit.Anti-jamming circuit is connected with the output cathode of output rectifier filer by contact j1, the electric signal of output cathode output terminal g, the g1 by anti-jamming circuit delivered to adjust in the circuit go, anti-jamming circuit is obtained the reference voltage signal by contact j and is delivered to adjust in the circuit and go; The output terminal v2 of voltage stabilized source is connected with the input terminus l of given circuit, by given circuit output contact h given voltage is transported to adjust in the circuit and goes, after comparing, amplify with the output voltage of anti-jamming circuit output terminal g, g1, deliver among the high-frequency transformer B1 and go by adjusting circuit output contact k1 and contact c2, the fluctuation of control output voltage makes reference voltage reach given magnitude of voltage.
In above-mentioned technical solution, its special character also is:
(1) power supply rectification filter circuit is made of diode D1-D12, capacitor C 1-C2, resistance R 1, and per two diode parallel connections are one group, and every phase input terminus is connected with two groups of diodes, and the output terminal of current rectifying and wave filtering circuit is a a1;
(2) high-frequency inverter is in parallel with diode D13 by three triode BG2-BG4, form first group, in parallel by triode BG5-GB7 with diode D14, form second group, two groups connect the back and form high-frequency inverter, its contact e is connected with the contact a1 of power supply rectification filter circuit, and contact e is connected with the power winding mid point d of high-frequency transformer B1 by resistance R 11 again.Two groups transistor base is connected with power winding two ends d1, the d2 of B1 respectively after connecting;
(3) limit galvanostat by inductance L 1, L2 be connected, after inductance L 3, L4 be connected, their mid point is connected with the two ends of capacitor C 14, C15, by contact e1, e2, limit galvanostat is connected with the BG2-BG4 of high-frequency inverter, the collector electrode of BG5-BG7, the other end of inductance L 2, L4 is connected with the input coil two ends of high-frequency transformer B2 respectively, the input coil mid point f1 of high-frequency transformer B2 is connected with the output terminal a of power supply rectification filter circuit, by high-frequency transformer B2, limit galvanostat and the coupling mutually of output rectifier filer;
(4) the output rectifier filer constitutes by Schottky rectification group Z6 and by the ∏ shape filtering circuit that inductance L 5, capacitor C 16, C17 form, two end points of Z6 are connected with the power winding two ends of high-frequency transformer B2 respectively, the output terminal of wave filter is respectively anode and negative electrode, plus earth;
(5) voltage stabilized source has two groups, and first group of power winding by transformer B, Schottky bridge-type circuit Z1, Z2, electric capacity c3-c6 and two three terminal regulators 7805,7905 etc. constitute, and it is output as v0, v1; Second group of power winding by transformer B, Schottky bridge-type circuit Z3, Z4, capacitor C 7-C10 and two three terminal regulators 7812,7912 etc. constitute, and its output terminal is v2, v3;
(6) direct supply is connected with the two ends of Schottky rectifying circuit Z5 by the power winding two ends of transformer B, and the two ends in addition of Z5 are connected with capacitor C 11, and V4 is an output terminal, V5 ground connection;
(7) sine-wave generator is by time base integrated package IC1, two totalizer IC2, IC3 and switch filter IC4, operational amplifier IC5, potentiometer W1, W2, resistance R 2-R8, capacitor C 12, formations such as C13, its input terminus b, b1 respectively with the output terminal V0 of first group of voltage stabilized source, V1 is connected, its output terminal c, connect resistance R 10 between the c1, the c end is connected with the base stage of triode BG1, the c1 end is connected with the emtting electrode of triode BG1, input coil one end of the collector electrode of BG1 and high-frequency transformer B1 is connected, the base stage of BG1 is connected to the c2 point by the input coil the other end of resistance R 9 and B1, sine-wave generator by high-frequency transformer B1 and high-frequency inverter mutually coupling join;
(8) anti-jamming circuit is made of inductance L 6, L7, resistance R 12, R13, R14, capacitor C 19, C20, C21 etc., L6, R12, R13, R14 are connected successively, the end of L7 is connected with the mid point of L6, R12, L7, C19 connect back ground connection, R12, R13 mid point, R13, R14 mid point are respectively by capacitor C 20, C21 ground connection, the other end of R14 is contact g, and contact g, g1 are the output terminal of anti-jamming circuit, and the other end j of L6 is connected with reference electrode;
(9) given circuit is made up of resistance R 21, voltage stabilizing tube DW, capacitor C 22, potentiometer W4 etc., and R21, W4 serial connection back is connected with output end of stabilized voltage supply V2 by R22, and voltage stabilizing tube DW and C22 are in parallel, one end ground connection, and the other end is connected between R21, the R22;
(10) adjust circuit by operational amplifier IC6, IC7, triode BG8, resistance R 15-R18, formations such as potentiometer W3, the pin 3 of IC6 is connected by the adjustable side h of the potentiometer W4 in resistance R 15 and the given circuit, pin 2 is connected with the pin 2 of IC7 by resistance R 16, the pin 6 of IC6 is connected with the base stage of triode BG8 by R17, the collector electrode of triode BG8 is connected with the output terminal V4 of direct supply by contact k, emtting electrode is transported to the input coil of high-frequency transformer B1 and the contact c2 of R9 by contact k1 with signal, pass through R18 ground connection between R17 and the BG8, the pin 7 of IC6 is connected with second group of output end of stabilized voltage supply V2 by contact m, pin 4 is connected with second group of output end of stabilized voltage supply V3 by the m1 point, the pin 6 of operational amplifier IC7 is connected with pin 2, the pin 3 of IC7 is connected with the output terminal g of anti-jamming circuit, the two ends of potentiometer W3 are connected to the pin 5 of IC7, on 4, the adjustable side of W3 is connected with the output terminal g1 of anti-jamming circuit.
The utility model has the advantages that: 1), eliminated harmonic wave, the voltage of output, electric current can not distorted, when load current changes, can guarantee that output voltage is more stable owing to adopted sine-wave generator; (2) adopted limit constant-current device,, can not make equipment produce trip phenomenon even load generation overcurrent or short circuit can guarantee that also outward current is constant; When load restoration just often, output voltage can go up automatically, makes reference voltage constant in set-point; (3) volume is little, and is in light weight, and distribution is convenient, can use the 220V alternating-current, also can use two-phase 380V or three-phase 380V power supply.
Fig. 1 is a functional-block diagram of the present utility model.
Fig. 2 is a circuit connection diagram of the present utility model.
Be described further below in conjunction with accompanying drawing: triode D1-D12 selects the diode of 50A, 600V for use, per two parallel connections are one group, in parallel with C1, C2 again after two groups of connections, add resistance R1 between C1, the C2, C1 is 1 μ 800V, and C2 is 300 μ 800V, R1 is that 2 Ω form current rectifying and wave filtering circuit, every phase input terminus is connected with the mid point of per two groups of diodes respectively, by direct current, supply high frequency invertor and the limit galvanostat of output terminal a, a1 output 500V.
BG2-BG7 selects the triode of 2DI150Z-100 for use in the high-frequency inverter, per three is one group, its base stage, collector electrode, emtting electrode interconnects, again respectively with D13, the D14 parallel connection, form two groups, diode D13, D14 selects 50A for use, 1000V, first group emtting electrode is connected with second group emtting electrode, its contact e is connected with the output point a1 of current rectifying and wave filtering circuit, the e point is connected with the output mid point d of high-frequency transformer B1 by resistance R 11 again, R11 selects 5 Ω for use, the resistance of 20W, the base stage of two groups of triodes respectively with the output terminal d1 of B1, d2 is connected.
Limit galvanostat is connected by inductance L 1, L2 connection, L3, L4, C14, C15 receive the mid point of L1, L2 and the mid point of L3, L4 after connecting, C14, C15 select the electric capacity of 20 μ for use, the mid point f of C14, C15 is connected with the e point, the other end of L2, L4 is connected with the input coil two ends of high-frequency transformer B2 respectively, and the input coil mid point f1 of B2 is connected with the output terminal a of current rectifying and wave filtering circuit.
The Schottky bridge-type rectification group Z6 that wave filter is made up of four diodes, the ∏ shape circuit of forming by inductance L 5, capacitor C 16, C17, capacitor C 16, C17 select the chemical capacitor of 500 μ f left and right sides 160-200V for use, inductance L 5 self-controls, two end points of Schottky bridge-type rectification group Z6 are connected with the output terminal of high-frequency transformer B2, two ends are connected with capacitor C 16 in addition, be connected with the end of L5 and the end of C17 again simultaneously, the tie point of L5, C17 is an output anode, the end that C16, C17 are connected is an output cathode, plus earth.
Voltage stabilized source has two groups, first group of power winding by transformer B provides 6V alternating-current, by being 200 μ 10V by Schottky bridge-type circuit Z1, Z2, capacitor C 3, C4, C5, C6() and first group of voltage stabilized source constituting of a pair of three terminal regulator integrated circuit block (7805,7905), its output terminal is V0, V1, output voltage is about the direct current of 5V, offers the sine-wave generator circuit.Second group of voltage stabilized source provided the alternating-current of 15V by second group of power winding of transformer B, by being 200 μ 24V by Schottky bridge-type circuit Z3, Z4, capacitor C 7, C8, C9, C10() and second group of voltage stabilized source of a pair of three terminal regulator (7812,7912) formation, its output terminal V2, V3 output voltage are about the direct current of 12V, supply with given circuit and adjust circuit.
Direct supply is provided the alternating-current of about 58V by the 3rd group of power winding of transformer B, by Schottky bridge-type circuit Z5 and capacitor C 11(200 μ 100V) direct supply formed, its output terminal V4, V5(V5 ground connection) direct current of the about 48V of output, supply with the adjustment circuit.
The time basic integrated package IC1 of sine-wave generator selects 555 o'clock base integrated packages for use, two up counter IC2, IC3 selects 4518 integrated packages for use, operational amplifier IC5 can select 741 or 080 integrated package for use, switch filter IC4 can select the 1/2MF10 integrated package for use, resistance R 2=1K, R3=220 Ω, R4=10K, R5=10K, R6=10K, R7=15K, R8=510 Ω, W1=1M, W2=150K, C12=0.01 μ, C13=0.01 μ, with potentiometer W1, resistance R 2, after being connected, capacitor C 12 is connected to b, between b1, the adjustable side of W1 and R3 one end are connected in b, the pin 8 of IC1,4 are connected to the other end b2 of R3, pin 7 is connected to W1, between the R2, pin 2,6 are connected to R2, between the C12, pin 1 is connected to b1, pin 5 is connected to b1 by C13, and pin 3 is connected with the pin 1 of IC2.IC2, the pin 2 of IC3,10,16 are connected to b2, pin 7,8,15 are connected to b1, pin 5,9 are connected, the pin 5 of IC2,9 pin 10 that are connected back and IC4 join, the pin 12 of IC2 is connected with the pin 1 of IC3, the pin 12 of IC3 is connected to R5 by R4, between the R6, and be connected R5 with the pin 1 of IC4, the R6 the other end respectively with the pin 2 of IC4,3 are connected, the pin 6 of IC4,7,8 are connected to b2, pin 5,9 ground connection, pin 13,14 are connected, pin 15 ground connection, and pin 12 is connected with the pin 2 of operational amplifier IC5 by R7, pin 3 ground connection of IC5, pin 4 meets b1, and pin 7 meets b2, and pin 2 joins by potentiometer W2 and pin 6, pin 6 is connected with the base stage of triode BG1 by R8, forms sine-wave generator.Its input terminus b, b1 are connected with first group of output end of stabilized voltage supply V0, V1 respectively, connect resistance R 10=5.1K between output terminal c, the c1, connecting resistance R 9(numerical value between c and the c2 determines in debugging), c and c1 again respectively with triode BG1(25D820) base stage be connected with emtting electrode, the basis set electrode is connected with input coil one end of high-frequency transformer B1, and the other end is connected with the output terminal k1 that adjusts circuit by contact c2.Sine-wave generator is coupled by high-frequency transformer B1 and high-frequency inverter.
Anti-jamming circuit is made of inductance L 6=150mH, L7=150mH, resistance R 12=R13=R14=5.1K, C19=1 μ 250V, C20=C21=1 μ 250V, L6, R12, R13, R14 are connected, the end of L7 is connected with L6, R12, C18, L7, C19 serial connection back ground connection, the end of C20, C21 is connected with the mid point of R12, R13, the mid point of R13, R14 respectively, its other end ground connection.Meet thunder arrester Ω between the other end of L6 and the ground, C18=1 μ 250V is in parallel with L6, and L6 links to each other with thunder arrester and a little is the j contact, and it is connected with reference electrode.Ground terminal is the j1 point, is connected with the negative electrode of wave filter.The output terminal g of anti-jamming circuit with adjust circuit in operational amplifier IC7(741) pin 3 be connected, the g1 end is connected with the adjustable side of potentiometer W3.By anti-jamming circuit, the signal that will obtain from reference electrode and be transported to adjust the circuit from the signal that negative electrode output obtains and go.
Given circuit is by resistance R 21=800 Ω, DW is 2DW7, capacitor C 22=1 μ 50V, potentiometer W4=470 Ω forms, R21, W4 serial connection back is connected with output end of stabilized voltage supply V2 by resistance R 22=1K, DW and C22 also are connected in the middle of R21, the R22, the other end ground connection, W4 the other end ground connection, its adjustable end is connected by the pin 3 of the operational amplifier IC6 in h, R15 and the adjustment circuit.
The operational amplifier IC6, the IC7 that adjust in the circuit select integrated package 741 for use, and triode BG8 selects 3DD15D for use, resistance R 15=R16=R17=1K, R18=15K, W3=10K.But the pin 3 of operational amplifier IC6 is connected with the point of adjustment of potentiometer W4 in the given circuit by resistance R 15, its pin 2 is connected with the pin 2 of IC7 by R16, the pin 6 of IC6 is connected by the base stage of resistance R 17 with triode BG8, the collector electrode of BG8 is connected with dc power output end V4 by the k point, emtting electrode k1 point is connected with the input terminus of high-frequency transformer B1 and the contact c2 of R9, the pin 7 of operational amplifier IC6 is connected with output end of stabilized voltage supply V2, pin 4 is connected with V3, the pin 6 of operational amplifier IC7 is connected with pin 2, the two ends of potentiometer W3 respectively with the pin 4 of IC7,5 are connected, the pin 6 of IC7 is connected with the pin 3 of operational amplifier IC8 by resistance R 19=10K, the pin 6 of IC8 is by resistance R 20=10K, potentiometer W5=10K, voltmeter V2 ground connection, the pin 6 of IC7 is connected with the measurement reference electrode again simultaneously.
Claims (2)
1, a kind of cathodic protection supply unit that constitutes by shell and internal wiring, it is characterized in that: internal wiring is by power supply rectification filter circuit, high-frequency inverter, limit galvanostat, the output rectifier filer, voltage stabilized source, direct supply, sine-wave generator, adjust circuit, anti-jamming circuit and given circuit constitute, outside input power supply is through passing through output terminal (a behind the power supply rectification filter circuit, a1) deliver to the input terminus (f1 of limit galvanostat, f) and the input terminus of high-frequency inverter (e), output terminal (V0 from voltage stabilized source, V) output DC is pressed onto the input terminus (b of sine-wave generator, b1), through sine-wave generator, the high_frequency sine wave electric signal of generation standard, export through high-frequency transformer B1, be sent in the high-frequency inverter, direct current is become 15-25KHZ high_frequency sine wave alternating-current, through high-frequency transformer B2 voltage is delivered in the output rectifier filer, direct current is by the output terminal negative electrode and the anode of wave filter, be added in the load, output terminal (the V2 of voltage stabilized source, V3) with the input terminus (m that adjusts circuit, m1) be connected, direct current is input in the adjustment circuit, anti-jamming circuit is connected by the output cathode of contact (j1) with the output rectifier filer, with the electric signal of output cathode output terminal (g by anti-jamming circuit, g) deliver to adjust in the circuit and go, anti-jamming circuit is obtained the reference voltage signal by contact (j) and is delivered in the adjustment circuit and go; The output terminal V2 of voltage stabilized source is connected with the input terminus (1) of given circuit, by given circuit output contact (h) given voltage is transported to adjust in the circuit and goes, after comparing, amplify with anti-jamming circuit output terminal (g, g1) voltage, deliver among the high-frequency transformer B1 and go by adjusting circuit output contact (k1) and contact (c2), the fluctuation of control output voltage makes reference voltage reach given magnitude of voltage.
2, the described cathodic protection supply unit of root tool claim 1 is characterized in that:
(1) power supply rectification filter circuit is made of diode D1-D12, capacitor C 1, C2, resistance R 1, and per two diode parallel connections are one group, and every phase input terminus is connected with two groups of diodes, and the output terminal of current rectifying and wave filtering circuit is contact (a, al);
(2) high-frequency inverter is in parallel with diode D13 by three triode BG2-BG4, form first group, in parallel by triode BG5-BG7 with diode D14, form second group, two groups connect the back and form high-frequency inverter, its contact (e) is connected with the contact (al) of power supply rectification filter circuit, contact (e) the resistance R11 that switches on again is connected with the power winding mid point (d) of high-frequency transformer B1, is connected with the power winding two ends (d1, d2) of B1 respectively after the connection of two groups transistor base;
(3) limit galvanostat is by inductance L 1, L2 is connected, inductance L 3, after L4 is connected, their mid point and capacitor C 14, the two ends of C15 are connected, by contact (e1, e2), the BG2-BG4 of limit galvanostat and high-frequency inverter, the collector electrode of BG5-BG7 is connected, inductance L 2, the other end of L4 is connected with the input coil two ends of high-frequency transformer B2 respectively, the input coil mid point (f1) of high-frequency transformer B2 is connected with the output terminal (a) of power supply rectification filter circuit, by high-frequency transformer B2, limit galvanostat and the coupling mutually of output rectifier filer;
(4) the output rectifier filer is made of the ∏ shape filtering circuit that Schottky rectification group Z6 and inductance L 5, capacitor C 16, C17 form, two end points of Z6 are connected with the power winding two ends of high-frequency transformer B2 respectively, the output terminal of wave filter is respectively anode and negative electrode, plus earth;
(5) voltage stabilized source has two groups, and first group of power winding by transformer B, Schottky bridge-type circuit Z1, Z2, capacitor C 3-C6 and two three terminal regulators etc. constitute, and it is output as V0, V1; Second group of power winding by transformer B, Schottky bridge-type circuit Z3, Z4, capacitor C 7-C10 and two three terminal regulators etc. constitute, and its output terminal is V2, V3;
(6) direct supply is connected with the two ends of Schottky rectifying circuit Z5 by the power winding two ends of transformer B, and the two ends in addition of Z5 are connected with capacitor C 11, and V4 is an output terminal, V5 ground connection;
(7) sine-wave generator is by time base integrated package IC1, two totalizer IC2, IC3 and switch filter IC4, operational amplifier IC5, potentiometer W1, W2, resistance R 2-R8, capacitor C 12, formations such as C13, its input terminus (b, b1) respectively with the output terminal V0 of first group of voltage stabilized source, V1 is connected, its output terminal (c, c1) connect resistance R 10 between, the c end is connected with the base stage of triode BG1, the c1 end is connected with the emtting electrode of triode BG1, input coil one end of the collector electrode of BG1 and high-frequency transformer B1 is connected, the base stage of BG1 is connected to (c2) point by the input coil the other end of resistance R 9 and B1, sine-wave generator by high-frequency transformer B1 and high-frequency inverter mutually coupling join;
(8) anti-jamming circuit is made of inductance L 6, L7, resistance R 12, R13, R14, capacitor C 19, C20, C21 etc., L6, R12, R13, R14 are connected successively, the end of L7 is connected with the mid point of L6, R12, L7, C19 connect back ground connection, R12, R13 mid point, R13, R14 mid point are respectively by capacitor C 20, C21 ground connection, the other end of R14 is contact (g), and contact (g, g1) is the output terminal of anti-jamming circuit, and the other end of L6 (j) is connected with reference electrode;
(9) given circuit is made up of resistance R 21, voltage stabilizing tube DW, capacitor C 22, potentiometer W4 etc., R21, W4 serial connection back is connected with output end of stabilized voltage supply V2 by resistance R 22, voltage stabilizing tube DW and C22 are in parallel, one end ground connection, and the other end is connected between R21, the R22;
(10) adjust circuit by operational amplifier IC6, IC7, triode BG8, formations such as resistance R 15-R18 potentiometer W3, the pin 3 of IC6 is connected by the adjustable side (h) of the potentiometer W4 in resistance R 15 and the given circuit, pin 2 is connected with the pin 2 of IC7 by resistance R 16, the pin 6 of IC6 is connected with the base stage of triode BG8 by R17, the collector electrode of triode BG8 is connected with the output terminal V4 of direct supply by contact (k), emtting electrode is transported to the input coil of high-frequency transformer B1 and the contact of R9 (c2) by contact (k1) with signal, pass through R18 ground connection between R17 and the BG8, the pin 7 of IC6 is connected with second group of output end of stabilized voltage supply V2 by contact (m), pin 4 is connected with second group of output end of stabilized voltage supply V3 by (m1) point, the pin 6 of operational amplifier IC7 is connected with pin 2, the pin 3 of IC7 is connected with the output terminal (g) of anti-jamming circuit, the two ends of potentiometer W3 are connected to the pin 5 of IC7, on 4, the adjustable side of W3 is connected with the output terminal of anti-jamming circuit (g1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94231917 CN2210196Y (en) | 1994-12-29 | 1994-12-29 | Power supply means with inhibiting corrosion of anodic and cathodic protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94231917 CN2210196Y (en) | 1994-12-29 | 1994-12-29 | Power supply means with inhibiting corrosion of anodic and cathodic protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2210196Y true CN2210196Y (en) | 1995-10-18 |
Family
ID=33843617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94231917 Expired - Fee Related CN2210196Y (en) | 1994-12-29 | 1994-12-29 | Power supply means with inhibiting corrosion of anodic and cathodic protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2210196Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320238A (en) * | 2019-06-17 | 2019-10-11 | 贵州电网有限责任公司 | A kind of ground net corrosion state detection circuit and ground net corrosion state monitoring method |
| CN116262972A (en) * | 2021-12-13 | 2023-06-16 | 中国石油天然气股份有限公司 | Casing cathode protection equipment based on impressed current |
-
1994
- 1994-12-29 CN CN 94231917 patent/CN2210196Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320238A (en) * | 2019-06-17 | 2019-10-11 | 贵州电网有限责任公司 | A kind of ground net corrosion state detection circuit and ground net corrosion state monitoring method |
| CN116262972A (en) * | 2021-12-13 | 2023-06-16 | 中国石油天然气股份有限公司 | Casing cathode protection equipment based on impressed current |
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