CN202741381U - Electromagnetic induction type pipeline 3PE corrosion-resistant rapid stripping device - Google Patents
Electromagnetic induction type pipeline 3PE corrosion-resistant rapid stripping device Download PDFInfo
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- CN202741381U CN202741381U CN 201220365569 CN201220365569U CN202741381U CN 202741381 U CN202741381 U CN 202741381U CN 201220365569 CN201220365569 CN 201220365569 CN 201220365569 U CN201220365569 U CN 201220365569U CN 202741381 U CN202741381 U CN 202741381U
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Abstract
The utility model relates to an anticorrosive quick stripping off device of electromagnetic induction formula pipeline 3 PE. The output of the high-frequency current detector, the input current detector, the IGBT temperature detector, the load temperature detector and the power grid voltage detector of the electromagnetic heating control system are connected with the input of the single-chip microcomputer control system; the output of the single-chip microcomputer control system is sequentially connected with a power modulator, a double PWM generator, a frequency tracking phase-locking control circuit and an isolation driver in series, the output of a power supply is connected with a high-power rectifying circuit, the outputs of the high-power rectifying circuit and the isolation driver are connected with an IGBT full-bridge inverter circuit, and the output of the IGBT full-bridge inverter circuit is connected with a heating coil; the heating coil is a fast-assembly type flame-retardant heating belt. The utility model discloses do not harm the steel pipe body, do not influence the welding strength of steel pipe, convenient operation uses manpower sparingly.
Description
Technical field
The utility model is the anticorrosion quick stripping off device of a kind of induction pipeline 3PE.Relate to the pipe-line system technical field.
Background technology
Owing to 3PE is anticorrosion very strong corrosion resistance is arranged, this anti-corrosion material has the strong alkali-acid resistance ability.Under cryogenic conditions, also has good corrosion-resistant and resistance to impact, the PE water absorption rate is low, it is high to possess simultaneously epoxy intensity, low and the PUR flexibility of PE water imbibition is good etc., very high anticorrosion reliability is arranged, because this specific character of 3PE anticorrosive coat, give sudden repairing or planned replace tubes occur, remove when the work such as getting angry brought a lot of all over constant, so invented following equipment.
One. pipeline of transferring natural gas from the west to the east company has applied for the patent of a cover " crawler-type large diameter pipeline external anticorrosive coating peeling machine " in 2010, this stripping machine adopts the chain-type climbing mechanism, the mode of two round brush is removed the pipeline external anti-corrosion layer, and it is long that per minute can be removed 200mm approximately, the anticorrosive coat that 150mm is wide.
It is anticorrosion that the anticorrosive coating peeling machine of transfering natural gas from the west to the east adopts hobboing cutter to remove, and lacks controlling unit, can only realize peeling off of circumference, can't use for the anticorrosive coating peeling of oil pressure warning device application process.
Two. Shenyang Liao Hai oil transporting appliance manufactory has applied for the patent of invention of " anti-corrosion layer of double-end pipeline remover " in 2011.The anticorrosive coat remover of describing in this patent can be removed the anticorrosive coat of climbing mechanism both sides simultaneously, and removing method is that steel brush is removed.
The anticorrosive coating peeling of Shenyang Liao Hai adopts bilateral to peel off, and does not consider requirement of explosion proof, mainly is applicable to the pipe-line construction phase carry out anticorrosive coat when butt welding and peel off fast.For dimension repairing link, no matter be shutoff or installation jig, peeling off of anticorrosive coat mainly is that the concentrated of a zone peeled off, and working space is usually limited, oil gas is not yet isolated, so the anticorrosive coating peeling machine of Shenyang Liao Hai is not suitable for tieing up the requirement of repairing operation.
All can not accomplish safe, quick, applicable effect according to the above two kinds of equipment of underdrawing of above two kinds of equipment.
The utility model content
The purpose of this utility model is that design is a kind ofly fast peeled off rapidly body with the 3PE anticorrosive coat, do not injured the steel pipe body, the anticorrosion quick stripping off device of induction pipeline 3PE of the weld strength that does not affect steel pipe, handled easily, saving manpower.
The quick stripping off device of induction pipeline 3PE anticorrosive coat is realized the anticorrosion quick removal of 3PE by mode of heating, carries out further work with the shortest time.
The quick stripping off device of induction pipeline 3PE anticorrosive coat is comprised of two parts: be respectively electromagnetic heating control system and heater coil.Electromagnetic heating control system output connects the heater coil on the pipeline.Described electromagnetic heating control system comprises one chip microcomputer control system, high frequency electric detector, input current detector, IGBT Temperature Detector, load temperature detector, network voltage detection device, display, power modulators, two PWM generator, frequency-tracking control circuit of phase locking, driver for isolating, main power source, high frequency overcurrent protection as shown in Figure 1.The input of the output order sheet microcomputer control system of high frequency electric detector, input current detector, IGBT Temperature Detector, load temperature detector, network voltage detection device, power supply are the power supply of one chip microcomputer control system; The output of one chip microcomputer control system has operation display, indicator lamp display and fan drives, the output of one chip microcomputer control system is connected in series power modulators, two PWM generator, frequency-tracking control circuit of phase locking and driver for isolating successively, the output of power frequency three phase mains connects the power rectifier circuit, the output of power rectifier circuit and driver for isolating connects the IGBT full bridge inverter, and the output of IGBT full bridge inverter connects heater coil; Heater coil is connected to power resonance electric capacity; The one chip microcomputer control system also has soft start.
Be subjected to temperature controlled power supply [heating output contactor (or solid-state relay) output] through electromagnetic heating control system with industrial frequency AC electric rectification, filtering, be reverse into the high-frequency alternating current of 16～30KHz, receive on the electromagnetic heating coil by connecting line, high-frequency alternating current sees through insulation material and acts on the metal heated object, makes the heated object self-heating.In addition, also can be directly inputted to electromagnetic heating control system to power supply, original temperature controller is directly controlled the duty of electromagnetic heating control system by the soft start interface of electrical heating controller.
The electric principle of described electromagnetic heating control system as shown in Figure 2; Two lines of attaching plug connect the filter circuit that is comprised of C1, L1, C2 through insurance and full bridge rectifier, capacitor C 3 and the capacitor C 4 of the two terminations series connection of filter capacitor C2, and the wiring circle outputs to an end of induction coil between capacitor C 3 and the capacitor C 4; The switch element IGBT 1 of simultaneously two terminations of filter capacitor C2 series connection and 1 end and 2 ends of switch element IGBT 2, connect 2 ends of transformer CT1 between switch element IGBT 1 and the switch element IGBT 2, connect the other end of induction coil after the 1 termination coil output 2 of transformer CT1; The 4 end ground connection of transformer CT1,3 termination control circuits, parallel resistance R3 between 3 ends of transformer CT1 and 4 ends; Difference parallel resistance R1 between the G utmost point of switch element IGBT 1 and the E utmost point, the group of connecting with Zener diode ZD1, ZD2 again is in parallel; Difference parallel resistance R3 between the G utmost point of switch element IGBT 2 and the E utmost point, the group of connecting with Zener diode ZD3, ZD4 again is in parallel; Be connected with the G utmost point of switch element IGBT 1 after driving 1G1 control signal 1 end series resistance R4 out, 2 ends directly are connected with the E utmost point of switch element IGBT 1; Be connected with the G utmost point of switch element IGBT 2 after driving 2G2 control signal 1 end series resistance R2 out, 2 ends directly are connected with the E utmost point of switch element IGBT 21; The input signal of the temperature controller thermocouple temperature sensor middle with being embedded in induction coil is connected, and the output control signal is connected with the soft start input of control circuit.Wherein control circuit is the one chip microcomputer control system, and the one chip microcomputer control system comprises high frequency electric detector, input current detector, IGBT Temperature Detector, load temperature detector, network voltage detection device, display, power modulators, two PWM generator, frequency-tracking control circuit of phase locking, driver for isolating.
Power supply by the inversion of IGBT inverter circuit, converts 18～30KHz high-frequency ac to after rectification, filtering.High-frequency ac power is added on the resonance circuit of solenoid and power resonance electric capacity composition, produces alternating magnetic field at coil plane, and alternating magnetic field makes the pipeline self-heating, and temperature raises.
Described heater coil be the fire-retardant heating tape of quick mounting type as shown in Figure 3; the fire-retardant heating tape of quick mounting type interior loop adopts the wrapped fiberglass braided fire-resistant high-temperature cable coiling of mica; operating voltage; below the ac rated voltage 600V; the long-term serviceability temperature that allows is below 500 ℃, and the fixing protection of heat-proof combustion-resistant canvas is adopted in the coil outside.The fire-retardant heating tape of quick mounting type size designs according to the pipeline girth.The heating tape width is that the 30cm(width dimensions is determined by welding operation face width degree), length is half of pipeline girth, there are two attachment plugs at bare wire section two ends, the load end of plug access electromagnetic heating control system, and the fire-retardant heating tape of this quick mounting type is fixed on the inner lane of coil clamp;
The structure of the fire-retardant heating tape of described quick mounting type anchor clamps as shown in Figure 4 and Figure 5, it is that two semicircle cutting support 5 one ends are connected by single-axis hinge 7, the other end connects and composes circle by spring plate hook 6, installed inside at cutting support 5 has up and down two groups of 4 rolling bearings 1, two ends installation one knife rest 3 with 4 rolling bearing 1 isolated diameter lines, the inner end of knife rest 3 is by cutter 2 is housed, the outer end of cutter 2 links to each other with depth of cut regulating handle 4, and the screw rod of 4 li sections of depth of cut regulating handle cooperates with nut on the knife rest 3; Rolling bearing 1 is conducive to the spacing of pipeline and rotates, and reduces Cutting Drag; Cutter 2 is used for the cutting anticorrosive coat; Knife rest 3 is used for the fixedly part of cutter; Depth of cut regulating handle 4 is because the thin and thick of anticorrosive coat is different, so just be designed to adjustable; Single-axis hinge 7 is arranged below the cutting support 5, and its relative position has 6 connection functions of a spring plate hook; Spring plate hook 6 Main Functions are to open, and are buckled on the pipeline, and spring plate hook 6 is provided with pendulum spring, plays cushioning effect, and the protective effect hinge 7 that pipeline plays cutter when outstanding if any oval and welding bead etc. plays connection function, handled easily.
The fire-retardant heating tape of quick mounting type advantage:
1) can change according to pipeline diameter, but polytropy, for example can be according to going the anticorrosive coat change in location to be circle, rectangle, the shapes such as circumference;
2) the fire-retardant heating tape of quick mounting type is applicable to serious pipeline deformation position, can not affect the rate of heat addition;
Can not have children outside the state plan naked light when 3) heat the fire-retardant heating tape of quick mounting type, can be used for job that requires special skills;
4) but coil be combined heatproof with high temperature flame-proof cloth and arrive below 500 ℃;
5) the fire-retardant heating tape of quick mounting type can be suitable for repeatedly, has lowered the spoilage when equipment uses.
The utility model by the steel pipe spontaneous heating, reaches the adhesive softening point temperature by electromagnetic principle, and temperature is between 220 ℃-240 ℃ after (optimum temperature value is learnt according to simulated experiment), removes fast the 3PE anticorrosive coat.
This equipment can change and change according to diameter of steel tube, also can be applied to be out of shape larger pipeline and can reach the effect of totally peeling off.
The quick stripping off device of induction pipeline 3PE anticorrosive coat can be fast and safely removal 3PE anticorrosive coat, the quick stripping machine of induction 3PE anticorrosive coat has the following advantages:
1. have a temperature thermocouple below 500 ℃, when detecting 0～500 ℃ of scope, detecting error is ± 1 ℃, but temperature controller set temperature fluctuation range is 3 ℃, and control precisely;
2. have soft start heating/stop mode: complete electrical isolation, have explosion prevention function, can and close use with solid-state relay (or contactor) control port;
3. have power regulating range: 30～100%, oneself is regulated as required, uses flexibly;
4. have LED light and can accurately know the machine works situation;
5. have the parameter controls such as coil output current size, IGBT temperature;
6. have heater coil short circuit, open circuit, the defencive function such as phase shortage, overheated, overcurrent, overvoltage;
7. have regularly, add up the functions such as timing, data record;
8. simple to operation, save time and do not injure the steel pipe body with manpower, can not affect the weld strength of steel pipe;
9. steel pipe is 10-15 minute in that arranged in the situation of thermal losses whole heat time heating time, and whole heat time heating time is fast, shortens working hours;
10. constant temperature time is long after the steel pipe heating, can allow the 3PE anticorrosive coat peel off fully and peel off totally, can carry out rapidly further work;
11. fire-retardant heating tape can change and change according to diameter of steel tube, also can use the larger pipeline of distortion and can reach and totally peel off effect.Have changeability and practicality.
The quick stripping off device of induction pipeline 3PE anticorrosive coat is applicable to the aging or various unfavorable factors impact of pipeline and causes normally conveying crude oil of pipeline, during the work such as sudden repairing or planned replace tubes occur, get angry.
The quick stripping off device application prospect of induction pipeline 3PE anticorrosive coat is extensive, and use value is high, has generalization.
Description of drawings
The anticorrosion quick stripping off device theory diagram of the induction pipeline 3PE of Fig. 1
The anticorrosion quick stripping off device electrical schematic diagram of the induction pipeline 3PE of Fig. 2
The fire-retardant heating tape of the anticorrosion quick stripping off device quick mounting type of the induction pipeline 3PE of Fig. 3
The fire-retardant heating tape of Fig. 4 quick mounting type anchor clamps front view
The fire-retardant heating tape of Fig. 5 quick mounting type chuck side view
1-rolling bearing, 2-cutter wherein
3-knife rest, 4-depth of cut regulating handle
5-cutting support, 6-spring plate hook
7-single-axis hinge
The specific embodiment
Embodiment. this example is an experimental prototype, and it consists of such as Fig. 1-shown in Figure 4.The quick stripping off device of this induction pipeline 3PE anticorrosive coat is comprised of two parts: be respectively the fire-retardant heating tape of electromagnetic heating control system and quick mounting type heater coil.Electromagnetic heating control system output connects the fire-retardant heating tape of quick mounting type.Described electromagnetic heating control system comprises that one chip microcomputer control system, input current detection, temperature detection, heating load adapt to detection, network voltage detection, display, power modulators, two PWM generator, frequency-tracking control circuit of phase locking, driver for isolating, main power source, high frequency overcurrent protection as shown in Figure 1.Input current detection, temperature detection, heating load adapt to the input of the output order sheet microcomputer control system of detection, network voltage detection, and power supply is the power supply of one chip microcomputer control system; The output of one chip microcomputer control system has operation display, indicator lamp display and fans drive, the output of one chip microcomputer control system is connected in series power modulators, two PWM generator, frequency-tracking control circuit of phase locking and driver for isolating successively, the output of main power source and driver for isolating connects half-bridge/full-bridge main circuit structure, half-bridge/full-bridge main circuit structure output connection circle and load; Coil and load connect power resonance electric capacity, power resonance electric capacity connects the high-frequency signal sampling, high-frequency signal sampling output connects the high frequency overcurrent protection, and the input of one tunnel order sheet microcomputer control system is exported in the high frequency overcurrent protection, and another road connects two PWM generators, frequency-tracking control circuit of phase locking; The one chip microcomputer control system also has soft start.
Described heater coil is the fire-retardant heating tape of quick mounting type; the fire-retardant heating tape of quick mounting type interior loop adopts the wrapped fiberglass braided fire-resistant high-temperature cable coiling of mica; operating voltage; below the ac rated voltage 600V; the long-term serviceability temperature that allows is below 500 ℃, and the fixing protection of heat-proof combustion-resistant canvas is adopted in the coil outside.The fire-retardant heating tape of quick mounting type size designs according to the pipeline girth.The heating tape width is that the 30cm(width dimensions is determined by welding operation face width degree), length is half of pipeline girth, there are two attachment plugs at bare wire section two ends, the load end of plug access electromagnetic heating control system, and the fire-retardant heating tape of this quick mounting type is fixed on the inner lane of coil clamp;
The structure of described coil clamp as shown in Figure 3 and Figure 4, it is that two semicircle cutting support 5 one ends are connected by single-axis hinge 7, the other end connects and composes circle by spring plate hook 6, installed inside at cutting support 5 has up and down two groups of 4 rolling bearings 1, two ends installation one knife rest 3 with 4 rolling bearing 1 isolated diameter lines, the inner end of knife rest 3 is by cutter 2 is housed, the outer end of cutter 2 links to each other with depth of cut regulating handle 4, and the screw rod of 4 li sections of depth of cut regulating handle cooperates with nut on the knife rest 3;
The electric principle of described electromagnetic heating control system as shown in Figure 2; Two lines of attaching plug connect the filter circuit that is comprised of C1, L1, C2 through insurance and full bridge rectifier, capacitor C 3 and the capacitor C 4 of the two terminations series connection of filter capacitor C2, and the wiring circle outputs to an end of induction coil between capacitor C 3 and the capacitor C 4; The inverter circuit IGBT1 of simultaneously two terminations of filter capacitor C2 series connection and 1 end and 2 ends of inverter circuit IGBT2, connect 2 ends of transformer CT1 between switch element IGBT 1 and the switch element IGBT 2, connect the other end of induction coil after the 1 termination coil output 2 of transformer CT1; The 4 end ground connection of transformer CT1,3 termination control circuits, parallel resistance R3 between 3 ends of transformer CT1 and 4 ends; Difference parallel resistance R1 between the G utmost point of switch element IGBT 1 and the E utmost point, the group of connecting with Zener diode ZD1, ZD2 again is in parallel; Difference parallel resistance R3 between the G utmost point of switch element IGBT 2 and the E utmost point, the group of connecting with Zener diode ZD3, ZD4 again is in parallel; Be connected with the G utmost point of switch element IGBT 1 after driving 1G1 control signal 1 end series resistance R4 out, 2 ends directly are connected with the E utmost point of switch element IGBT 1; Be connected with the G utmost point of switch element IGBT 2 after driving 2G2 control signal 1 end series resistance R2 out, 2 ends directly are connected with the E utmost point of switch element IGBT 21; The input signal of the temperature controller thermocouple temperature sensor middle with being embedded in induction coil is connected, and the output control signal is connected with the soft start input of control circuit.
Wherein:
Switch element IGBT 1 is selected the 150A IGBT of imported with original packaging Infineon module;
Driver module is selected driver module Japanese fuji EXB841
Control circuit is the one chip microcomputer control system, and type selecting is Samsung single-chip microcomputer S3F9454.The one chip microcomputer control system comprises high frequency electric detector, input current detector, IGBT Temperature Detector, load temperature detector, network voltage detection device, display, power modulators, two PWM generator, frequency-tracking control circuit of phase locking, driver for isolating.
The choosing value of other element as shown in Figure 2.
Data in the quick stripping off device test of induction pipeline 3PE anticorrosive coat:
The quick stripping off device of induction pipeline 3PE anticorrosive coat is for the first time by the 3PE anti-corrosive steel tube, diameter of steel tube is 813mm, length is that 9M is when heating without media flow (17 ℃ of room temperatures), be 150 ℃ of heating 20 minutes to steel pipe heating exfoliation temperature for the first time, cause peeling off for the first time and fail to peel off fully.
The quick stripping off device of induction pipeline 3PE anticorrosive coat is for the second time by the 3PE anti-corrosive steel tube, diameter of steel tube is 813mm, length is that 9M heats 15 minutes (21 ℃ of room temperatures) without media flow, 3PE anti-corrosive steel tube heating exfoliation temperature is 200 ℃, in the constant temperature situation, area is (100cm * 30cm) peel off thoroughly totally.
The quick stripping off device of induction pipeline 3PE anticorrosive coat is for the third time by the 3PE anti-corrosive steel tube, diameter of steel tube is 813mm, length is that 11M heats 15 minutes (17 ℃ of room temperatures) without media flow, 3PE anti-corrosive steel tube heating exfoliation temperature is 210 ℃, in the constant temperature situation, area is (100cm * 30cm) peel off thoroughly totally.
Induction pipeline 3PE anticorrosive coat diameter of steel tube is 813mm, and length is 9M, and stripping off device is in simulation leakage of oil repairing field trial (20 ℃ of room temperatures); steel pipe is injected 1/3 crude oil; allow crude oil cover the steel pipe inwall fully, the butter wall is placed at the steel pipe two ends, carry out sealing and scene protection measure.Placed one hour, allow and be full of flammable oil gas in the steel pipe, then the quick stripping machine of induction 3PE anticorrosive coat heats steel pipe (temperature setting is set to heating between 240 ℃-260 ℃), after 15 minutes, whole heating process does not reach crude oil and dodges quick-fried point, fuel gas detects gas concentration within the safe range value, so the heating-up temperature value also can be peeled off the 3PE anticorrosive coat fast within safe range.
This example proves that through test the anticorrosion quick stripping off device of this induction pipeline 3PE has in lower characteristics:
1) whole power supply firing equipment uses soft starting mode, the electric spark that produces when the solid-state relay contact is stopped in the oil gas isolation fully;
2) remove 3PE anticorrosive coat area for (it is thoroughly clean that 100cm * 30cm) peels off, and the time saves time for (10-15 minute) and manpower and do not injure the steel pipe body according to knowing of above-mentioned experimental result;
3) stop physical removal injury steel-pipe welding position, can not affect the weld strength of steel pipe;
4) 1-2 people simple to operation just can operate, and saves manpower;
5) the complete equipment safety anti-explosive is up to standard is applicable to job that requires special skills.
Claims (3)
1. the anticorrosion quick stripping off device of induction pipeline 3PE is characterized in that being comprised of electromagnetic heating control system and heater coil two parts; Electromagnetic heating control system output connects the heater coil on the pipeline;
Described electromagnetic heating control system comprises one chip microcomputer control system, high frequency electric detector, input current detector, IGBT Temperature Detector, load temperature detector, network voltage detection device, display, power modulators, two PWM generator, frequency-tracking control circuit of phase locking, driver for isolating, main power source, high frequency overcurrent protection; The input of the output order sheet microcomputer control system of high frequency electric detector, input current detector, IGBT Temperature Detector, load temperature detector, network voltage detection device, power supply are the power supply of one chip microcomputer control system; The output of one chip microcomputer control system has operation display, indicator lamp display and fan drives, the output of one chip microcomputer control system is connected in series power modulators, two PWM generator, frequency-tracking control circuit of phase locking and driver for isolating successively, the output of power frequency three phase mains connects the power rectifier circuit, the output of power rectifier circuit and driver for isolating connects the IGBT full bridge inverter, and the output of IGBT full bridge inverter connects heater coil; Heater coil is connected to power resonance electric capacity; The one chip microcomputer control system also has soft start;
Described heater coil is the fire-retardant heating tape of quick mounting type, upper around solid high frequency coil (10) at rectangle heat-proof combustion-resistant woven belt (11), the two ends of high frequency coil (10) connect cable (8) in succession, and the two ends of heat-proof combustion-resistant woven belt (11) are fixed with quick thread gluing (9); The fire-retardant heating tape of quick mounting type interior loop adopts the wrapped fiberglass braided fire-resistant high-temperature cable coiling of mica, and operating voltage is below the ac rated voltage 600V; The length of the fire-retardant heating tape of quick mounting type is half of pipeline girth, and there are two attachment plugs at bare wire section two ends, the load end of plug access electromagnetic heating control system, and the fire-retardant heating tape of quick mounting type is fixed on the inner lane of coil clamp;
Be subjected to temperature controlled power supply through electromagnetic heating control system with industrial frequency AC electric rectification, filtering, be reverse into the high-frequency alternating current of 16～30KHz, receive on the electromagnetic heating coil by connecting line, high-frequency alternating current sees through insulation material and acts on the metal heated object, makes the heated object self-heating; Or power supply is directly inputted to electromagnetic heating control system, original temperature controller is directly controlled the duty of electromagnetic heating control system by the soft start interface of electrical heating controller.
2. the anticorrosion quick stripping off device of induction pipeline 3PE according to claim 1, the electric principle that it is characterized in that described electromagnetic heating control system is: two lines of attaching plug connect the filter circuit that is comprised of C1, L1, C2 through insurance and full bridge rectifier, capacitor C 3 and the capacitor C 4 of the two terminations series connection of filter capacitor C2, the wiring circle outputs to an end of induction coil between capacitor C 3 and the capacitor C 4; The switch element IGBT 1 of simultaneously two terminations of filter capacitor C2 series connection and 1 end and 2 ends of switch element IGBT 2, connect 2 ends of transformer CT1 between switch element IGBT 1 and the switch element IGBT 2, connect the other end of induction coil after the 1 termination coil output 2 of transformer CT1; The 4 end ground connection of transformer CT1,3 termination control circuits, parallel resistance R3 between 3 ends of transformer CT1 and 4 ends; Difference parallel resistance R1 between the G utmost point of switch element IGBT 1 and the E utmost point, the group of connecting with Zener diode ZD1, ZD2 again is in parallel; Difference parallel resistance R3 between the G utmost point of switch element IGBT 2 and the E utmost point, the group of connecting with Zener diode ZD3, ZD4 again is in parallel; Be connected with the G utmost point of switch element IGBT 1 after driving 1G1 control signal 1 end series resistance R4 out, 2 ends directly are connected with the E utmost point of switch element IGBT 1; Be connected with the G utmost point of switch element IGBT 2 after driving 2G2 control signal 1 end series resistance R2 out, 2 ends directly are connected with the E utmost point of switch element IGBT 21; The input signal of the temperature controller thermocouple temperature sensor middle with being embedded in induction coil is connected, and the output control signal is connected with the soft start input of control circuit.Wherein control circuit is the one chip microcomputer control system, and the one chip microcomputer control system comprises high frequency electric detector, input current detector, IGBT Temperature Detector, load temperature detector, network voltage detection device, display, power modulators, two PWM generator, frequency-tracking control circuit of phase locking, driver for isolating.
3. the anticorrosion quick stripping off device of induction pipeline 3PE according to claim 1, the structure that it is characterized in that described coil clamp is that two semicircle cutting support (5) one ends are connected by single-axis hinge (7), the other end connects and composes circle by spring plate hook (6), installed inside at cutting support (5) has up and down two groups of (4) rolling bearings (1), two ends installation one knife rest (3) with the isolated diameter line of 4 rolling bearings (1), the inner end of knife rest (3) is by cutter (2) is housed, the outer end of cutter (2) links to each other with depth of cut regulating handle (4), and the screw rod of the inner section of depth of cut regulating handle (4) cooperates with nut on the knife rest (3); Single-axis hinge (7) is arranged below the cutting support (5), and its relative position has a spring plate hook (6) that plays connection function, and spring plate hook (6) is provided with pendulum spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220365569 CN202741381U (en) | 2012-07-26 | 2012-07-26 | Electromagnetic induction type pipeline 3PE corrosion-resistant rapid stripping device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220365569 CN202741381U (en) | 2012-07-26 | 2012-07-26 | Electromagnetic induction type pipeline 3PE corrosion-resistant rapid stripping device |
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| CN202741381U true CN202741381U (en) | 2013-02-20 |
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| CN 201220365569 Expired - Lifetime CN202741381U (en) | 2012-07-26 | 2012-07-26 | Electromagnetic induction type pipeline 3PE corrosion-resistant rapid stripping device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567195A (en) * | 2012-07-26 | 2014-02-12 | 中国石油天然气股份有限公司 | Electromagnetic induction type pipeline 3PE corrosion-resistant rapid stripping device |
| CN104190675A (en) * | 2014-08-27 | 2014-12-10 | 孙海华 | Cleaning method and device special for 3PE erosion resistant layer of oil and gas pipeline |
| CN112644143A (en) * | 2019-11-21 | 2021-04-13 | 齐凤河 | Metal pipeline anticorrosive coating stripping off device |
| CN114158144A (en) * | 2021-12-31 | 2022-03-08 | 国家石油天然气管网集团有限公司 | Pipeline anticorrosive coating stripping, pipe orifice heating and welded junction heat preservation integrated device and platform |
-
2012
- 2012-07-26 CN CN 201220365569 patent/CN202741381U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567195A (en) * | 2012-07-26 | 2014-02-12 | 中国石油天然气股份有限公司 | Electromagnetic induction type pipeline 3PE corrosion-resistant rapid stripping device |
| CN103567195B (en) * | 2012-07-26 | 2015-11-18 | 中国石油天然气股份有限公司 | Electromagnetic induction type pipeline 3PE corrosion-resistant rapid stripping device |
| CN104190675A (en) * | 2014-08-27 | 2014-12-10 | 孙海华 | Cleaning method and device special for 3PE erosion resistant layer of oil and gas pipeline |
| CN112644143A (en) * | 2019-11-21 | 2021-04-13 | 齐凤河 | Metal pipeline anticorrosive coating stripping off device |
| CN114158144A (en) * | 2021-12-31 | 2022-03-08 | 国家石油天然气管网集团有限公司 | Pipeline anticorrosive coating stripping, pipe orifice heating and welded junction heat preservation integrated device and platform |
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