CN101078042A - Medium frequency induction heating treatment method for steel pipe, petroleum well pipe and drill pipe - Google Patents
Medium frequency induction heating treatment method for steel pipe, petroleum well pipe and drill pipe Download PDFInfo
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- CN101078042A CN101078042A CNA2007100247451A CN200710024745A CN101078042A CN 101078042 A CN101078042 A CN 101078042A CN A2007100247451 A CNA2007100247451 A CN A2007100247451A CN 200710024745 A CN200710024745 A CN 200710024745A CN 101078042 A CN101078042 A CN 101078042A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P10/20—Recycling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
This invention provides a kind of main-frequency induction heating method using in the frequency treatment system of steel pipe and the tube and drill pipe of oil well. This method include put the work piece to the storage platform, the work piece automatic alignment and localization, the work piece enter the heating roller, quenching inducing heated, closed loop temperature control system, continuum spray ensure the work piece being uniformly quenched entire and quickly, the water stay in the work piece being ejected on the detearing platform, the work piece is heated by the temper inducing heater which controlled by the infrared thermometer controller, descaling device, and then enter the descaling device , the final is the cooling platform. The intermediate-frequency induction heater is using as the heating system, which is safe, no pollution and with little oxide scale. The heater roller ensure the work piece is heated uniformly and entirely, and after this process the work piece no need to be straightened which decrease the cost. The spray quenching equipment ensure the work piece could be uniformly quenched entire and quickly. The descaling device makes the surface of the work piece brightly. The detearing platform makes the work piece move automatically, which won' t influence the heating effect. And the water and steam could not enter the heating inducing loop either, which can increase the life of the loop..
Description
Technical field
What the present invention relates to is steel pipe, oil well pipe and drilling rod Frequency Induction Heating heat treating method, belongs to steel pipe heat treatment technics field.
Background technology
Thermal source in existing steel pipe, oil well pipe and the drilling rod heat treating method mainly is with gas (as liquefied gas, Sweet natural gas, gas maked coal), and as the heating thermal source in the heat treatment system, its major defect is with gas, environment there is pollution, have potential safety hazard, oxide skin is many, the cost height.Prior art is except using gas as the heating thermal source, equipment such as used heating roller-way, spraying and quenching device, descaling device, water leaching table all have defective, can't guarantee workpiece steel pipe or oil well pipe or drilling rod rotation in heat-treatment process as used heating roller-way, workpiece steel pipe or oil well pipe or drilling rod heat inhomogeneous in heat-treatment process, workpiece steel pipe after the heating or oil well pipe or drilling rod must increase production cost through the straightener alignment through behind this roller-way.Can't make the evenly through hardening fully rapidly of steel pipe, oil well pipe and drilling rod in the spray as used spraying and quenching device continuously with line, and to steel pipe, oil well pipe and the drilling rod planeness of about 10 meters length, 0.2% of the uncontrollable total length that measures the other end from pipe one end.In each end 1524mm scope, must not exceed 3.175mm.As used descaling device workpiece steel pipe or oil well pipe or drilling rod are heat-treated in the process steel pipe after tempered at roller-way by behind this descaling device, finished product workpiece steel pipe or oil well pipe or drilling rod surface-brightening can't reach true qualities.As used water leaching table, this water leaching table is a planar, it can't make workpiece steel pipe or oil well pipe or drilling rod automatic shifting, also can't make workpiece steel pipe or oil well pipe or drilling rod on water leaching table during automatic shifting, to have a spot of ponding not discharge behind spray quench in the pipe and remove totally, water can bring to the tempering heating zone like this, not only influences heats, and water and steam can enter in the tempering load coil, influences the work-ing life of load coil.
Summary of the invention
The objective of the invention is to defective, propose a kind of with steel pipe, oil well pipe and the drilling rod Frequency Induction Heating heat treating method and the equipment of Frequency Induction Heating as the thermal treatment heating power supply at above-mentioned existence.
Technical solution of the present invention: steel pipe, oil well pipe and drilling rod Frequency Induction Heating heat treating method, the processing step of this method is divided into,
(1) storing platform on the workpiece: storing platform on workpiece steel pipe or oil well pipe or the drilling rod, proper alignment: storing platform table top inclination 2-5 degree, workpiece is hung on the storing platform by overhead traveling crane, the automatic sequential proper alignment; Storing platform stop gauge is an eccentric wheel structure, adjusts eccentric wheel in the different angles position for φ 60～φ 139.7, makes turn-down rig can only turn over a material at every turn.
(2) the automatic positioned in alignment of workpiece:
Workpiece steel pipe or oil well pipe or drilling rod are delivered to first station by storing platform bin---and positioned in alignment roller-way, location roller-way are made up of four running rollers and the material feeding switch are housed, and wherein the two ends running roller is driven by the driven by motor step-down gear, so that the workpiece alignment.
(3) workpiece enters the heating roller-way: workpiece enters the heating roller-way, carry out even heating, tilt at the heating roller-way V-type running roller and frequency control motor and step-down gear are installed, the V-type roller speed adopts speed control by frequency variation, by inductor block operation stepping feeder the workpiece on the alignment frame is lifted reposefully, roll and deliver on the frequency conversion feeder that is inclination 8-20 ° installation, the speed forward feeding of frequency conversion feeder to set, the frequency conversion feeder is single roller transmission, speed, adjustable height, workpiece steel pipe or oil well pipe or drilling rod are placed in rotation in load coil on the V-type running roller, to workpiece steel pipe or oil well pipe or drilling rod even heating; Wherein between the ruhmkorff coil and the feed rolls of import and export be heat-resistance stainless steel, all the other are wear resisting steel, and water-chilling plant in the rotary seal is housed, the cooling feed rolls also makes feed rolls outside surface drying, being convenient to workpiece steel pipe or oil well pipe or drilling rod heats continuously, the roller-way of quenching heating zone has been mounted to the 0.3-1 degree, and the aqueous reflux when preventing to quench in the residual pipe is to the quenching heating zone;
(4) quenching induction heating: workpiece steel pipe or oil well pipe or drilling rod enter quenching Frequency Induction Heating district through the heating roller-way, this heating zone is joined many group heat induced coils by the different intermediate frequency power supply of two cover power and is formed quenching induction heating district, and Heating temperature guarantees the even of workpiece temperature for 850 ℃-1000 ℃.
Adopt the induction of two kinds of internal diameters to add the steel pipe heating that coil satisfies φ 60.3～φ 88.9 and φ 114.3～φ 139.7 specifications.Quench a district heater coil several, quench two district's heater coils several, tempering one district's heater coil several, tempering two district's heater coils several, coil satisfies the cooling under the overall loading situation with accurate cold drawn rectangle copper tube, employing water cooling.Be coated in coil inside with the special high temperature material of import disconnected reliably heat and insulation are provided.The copper pipe of coil is handled through insullac repeatedly and is reached complete insulating requirements.
(5) closed loop thermal Controlling System: the temperature of carrying out monitoring workpiece at the exit of heat induced coil bicolorimetric method infrared thermometer, and the output rating of signal feedback being regulated automatically intermediate frequency power supply to intermediate frequency power supply, form closed loop control system, control product technological temperature is in the limit of error that allows.
(6) make workpiece evenly through hardening fully rapidly with the continuous spray of line: workpiece steel pipe after the heating or oil well pipe or drilling rod enter the spray quench district, adopt the ring-type refrigerating unit continuously water flow jet to be arrived heated steel tube surface, reach the effect of the desired quick Homogeneouslly-radiating of complete through hardening tube wall, strong spray 5-30 reaches the quenching purpose within second, (pressure is 125 meters water cycle amount 1000m hourly of lift to select two cover big-flow high-pressure water pumps for use
3/ h), total power guarantees that the steam film that workpiece steel pipe or oil well pipe or drilling rod surface are produced destroys more than 500kW.
(7) residuary water in the workpiece spills in the pipe on water leaching table: bring in the tempering coil in order to remove the water that workpiece steel pipe or oil well pipe or drilling rod stay in the pipe after quenching, utilize water leaching table to tilt to reach the purpose that dewaters in two directions, a direction tilts to make workpiece steel pipe or oil well pipe or drilling rod automatic shifting, another direction makes workpiece steel pipe or oil well pipe or drilling rod on water leaching table during automatic shifting 2-5 ° of workpiece steel pipe or oil well pipe or the inclination of drill rod axis direction, make the water in workpiece steel pipe or oil well pipe or the drilling rod drop down light, behind the several minutes, lift by the Pneumatic charging machine and to serve on the tempering line roller-way.
(8) tempering induction heating: enter workpiece steel pipe on the tempering induction heating district roller-way or oil well pipe or drilling rod rotation on roller-way and move forward, enter tempering heating in medium frequency coil and carry out the tempering heating.
(9) infrared measurement of temperature closed loop control system: double color infrared temperature measuring instrument is measured temperature signal by after the electrical apparatus control system signal processing, and the closed loop temp testing controlling system is formed in the power output of regulation and control intermediate frequency power supply.
(10) oxide skin of removing workpiece surface; Workpiece steel pipe after the tempered heating or oil well pipe or drilling rod are transported to the de-scaling station by roller-way, carry out de-scaling by the descaling device on the de-scaling station, remove the oxide compound of workpiece surface.
(11) cold bed: the workpiece after the de-scaling enters cold bed station signal through the electrical apparatus control system signal processing, and mechanical manipulator is turned to the workpiece steel pipe on the roller-way or oil well pipe or drilling rod on the cold bed.
Workpiece steel pipe or oil well pipe or drilling rod through de-scaling, workpiece steel pipe or oil well pipe or drilling rod are lifted reposefully by pneumatic transmission stepping feeder by inductor block operation, roll and be put into slowly rotation on the cold bed, progressively cooling, workpiece steel pipe or oil well pipe or drilling rod are collected at the cold bed mouth, and artificial enlacement packaging handling is to next workshop section.
Advantage of the present invention: heat the thermal source environmentally safe with Frequency Induction Heating as thermal treatment, safety, oxide skin is few, and cost is low.Used equipment heating roller-way can effectively guarantee workpiece homogeneous heating in heat-treatment process, and the workpiece after the heating need not the straightener alignment through behind this roller-way, has reduced production cost.Spraying and quenching device makes workpiece evenly through hardening fully rapidly in the spray continuously with line, and descaling device makes finished product workpiece surface light reach true qualities.Water leaching table, make the workpiece automatic shifting, make workpiece on water leaching table during automatic shifting, ponding emptying in will behind spray quench, managing, can not bring to the tempering heating zone, not only do not influence heats, and water and steam can not enter in the tempering load coil yet, not have the work-ing life that influences load coil.
Guarantee that work center line is coaxial and workpiece is passed through continuously with the medullary ray of ring spray device on medullary ray.The workpiece that be to adapt to different size, the ring spray device center of our design can up-down adjustment, about skew; Quenchant sprays around workpiece surface, guarantees workpiece evenly cooling all around; For destroying rapidly, the vapor film that quenchant is generated at workpiece surface guarantees quick cooling, jetting fluid pressure 5-15Kg/cm
2, and may command; For long-term stability keeps spraying processing parameter (as flow, pressure) the nozzle employing Wimet manufacturing of quenching; Stop up for getting rid of nozzle, adopt detachable nozzle, can in time for convenience detachly get off to change or cleaning if any stopping up; Flexural deformation for the control workpiece.Suitably more slowly, adopt the little nozzle of flow in the previous spray of entrance end district speed of cooling, and add one supporting in inside.Strengthen at quench district flow, pressure of back two sprays, make workpiece cooling and can regulating fast; The adjustable angle of the relative axis of workpiece of nozzle of three sections joint in the ring spray device can accomplish that like this workpiece by the spray district of quenching, minimizes the backwater of quenchant to the rear portion that enters workpiece; Three cover spraying and quenching devices are joined two cover high-pressure pump and are adopted 1 pump of 2 pump works standby, the flow 500m of every pump
3/ h, 125 meters of lifts, total flux 1000m
3About/h; Pipeline, valve etc. adopt stainless steel, and join under meter, pressure and temperature transmitter.Water index: total hardness 100PPm, total undissolved solid 200PPm, electric conductivity 100～300 μ s/cm, suspended solids 10PPm, pH value 7～8.
Description of drawings
Accompanying drawing 1 is a schema of the present invention.
Among the figure 1 is storing platform on the workpiece, proper alignment, the 2nd, the automatic positioned in alignment of workpiece, the 3rd, workpiece enters the heating roller-way, carry out even heating, the 4th, quenching heating system, the 5th, infrared closed loop thermal Controlling System, the 6th makes workpiece evenly through hardening, the 7th fully rapidly, water leaching table on the workpiece with the continuous spray of line, residuary water in the workpiece spills on water leaching table in the pipe, the 8th, tempering heating system, the 9th, infrared measurement of temperature closed loop control system, the 10th, de-scaling, the oxide skin, the 11st of removing steel tube surface, cold bed.
Embodiment
Described processing step (1)-(11) are to carry out under the programming Control of electrical apparatus control system, as processing step:
(1) storing platform on the workpiece: be contained in first, second transmitter on the storing platform, the signal of gathering is inserted electrical apparatus control system first signal input part corresponding with it, second signal input terminus by its first, second output terminal, after the electrical apparatus control system signal processing, the material loading signal by the signal input part in first output terminal access warning device of electrical apparatus control system, is sent sound, light notice material loading; Second output terminal of electrical apparatus control system inserts the input terminus of first mechanical manipulator on the alignment station, send null signals by first mechanical manipulator, this null signals treats that electrical apparatus control system sends the material loading signal, sends the material loading signal by first mechanical manipulator of electrical apparatus control system on the alignment station;
(2) the automatic positioned in alignment of workpiece: the 3rd transmitter in the station alignment means will have the signal of workpiece material to insert electrical apparatus control system three signal input part corresponding with it by its 3rd output terminal, after the electrical apparatus control system signal processing, the material loading signal is inserted the input terminus of station alignment means by electrical apparatus control system the 3rd signal output part, send the material loading signal to the station alignment means, prepare for whether next step enters the heating roller-way;
(3) workpiece enters the heating roller-way: workpiece steel pipe or oil well pipe or drilling rod drive running roller forward by the speed control by frequency variation machine, leave the material loading position, the four-sensor of heating on the roller-way inserts electrical apparatus control system four signal input part corresponding with it with the signal that workpiece steel pipe or oil well pipe or drilling rod leave the material loading position by its 4th signal output part, after the electrical apparatus control system signal processing, the material loading signal inserts the input terminus of second mechanical manipulator in the heating roller-way by electrical apparatus control system the 4th signal output part, and, carry out next workpiece material loading with the material loading signal that above-mentioned alignment means is sent;
(4) quenching induction heating: the rotation and moving forward on the heating roller-way of workpiece steel pipe or oil well pipe or drilling rod, the speed that moves enters the electric induced line collar region by the control of speed control by frequency variation machine, and the induction even heating quenches.
(5) closed loop thermal Controlling System: the temperature signal that double color infrared temperature measuring instrument is measured inserts electrical apparatus control system five signal input part corresponding with it by the 5th transmitter the 5th signal output part, after the electrical apparatus control system signal processing, the power signal of regulation and control heating in medium frequency power supply inserts the input terminus of heating in medium frequency power supply by electrical apparatus control system the 5th signal output part, power by electrical apparatus control system regulation and control heating in medium frequency power supply, make workpiece reach the temperature of technique initialization, form the closed loop thermal Controlling System.
(6) make workpiece evenly through hardening fully rapidly with the continuous spray of line: the workpiece steel pipe behind the even heating or oil well pipe or drilling rod, enter the spraying and quenching device in the spray quench district, carry out quench treatment, make workpiece steel pipe or oil well pipe or the complete through hardening of drilling rod, the workpiece steel pipe of through hardening or oil well pipe or drilling rod enter the draining district fully.
(7) residuary water in the workpiece spills outside the workpiece on water leaching table: the 6th transmitter on the draining district roller-way, the signal that workpiece is put in place inserts electrical apparatus control system six signal input part corresponding with it by the 6th signal output part of this transmitter, after the electrical apparatus control system signal processing, the signal that workpiece steel pipe or oil well pipe or drilling rod are translated on the water leaching table passes through the input terminus that electrical apparatus control system the 6th signal output part inserts the 3rd mechanical manipulator in the draining district, by the 3rd mechanical manipulator the workpiece on the draining district roller-way is translated on the water leaching table, stop after several minutes, automatic draining, the residence time is controlled by electrical apparatus control system, simultaneously workpiece steel pipe or oil well pipe or the drilling rod signal that is transported to tempering line induction heating district connects the input terminus of the 4th mechanical manipulator by electrical apparatus control system the 6th signal output part, manipulator behavior is transported to tempering line induction heating district with workpiece steel pipe or oil well pipe or drilling rod.
(8) tempering induction heating: enter workpiece steel pipe on the tempering induction heating district roller-way or oil well pipe or drilling rod rotation on roller-way and move forward, enter tempering heating in medium frequency coil and carry out the tempering heating.
(9) infrared measurement of temperature closed loop control system: double color infrared temperature measuring instrument is measured temperature signal insert electrical apparatus control system seven signal input part corresponding with it by the 7th transmitter the 7th signal output part, after the electrical apparatus control system signal processing, the power output signal of regulation and control intermediate frequency power supply is inserted the input terminus of intermediate frequency power supply by electrical apparatus control system the 7th signal output part, the closed loop temp testing controlling system is formed in the power output of regulation and control intermediate frequency power supply.
(10) oxide skin of removing workpiece surface; Workpiece steel pipe after the tempered heating or oil well pipe or drilling rod are transported to the de-scaling station by roller-way, carry out de-scaling by the descaling device on the de-scaling station, remove the oxide compound of workpiece surface.
(11) cold bed: the workpiece after the de-scaling enters the cold bed station, workpiece steel pipe or oil well pipe or drilling rod logical its 8th signal output part of signal that enters the cold bed station after with de-scaling of the 8th transmitter on this cold bed station district roller-way inserts electrical apparatus control system eight signal input part corresponding with it, through the electrical apparatus control system signal processing, the signal that workpiece steel pipe on the roller-way or oil well pipe or drilling rod are turned on the cold bed inserts the input terminus of the 5th mechanical manipulator by electrical apparatus control system the 8th signal output part, and the 5th mechanical manipulator is turned to the workpiece steel pipe on the roller-way or oil well pipe or drilling rod on the cold bed.
That above-mentioned mechanical manipulator adopts is high temperature resistant connection transmitter (model transmitter Y34-D50C1)
Embodiment
The storing platform is the oblique skeleton construction of 2～5 ° of gradients, workpiece steel pipe or oil well pipe or drilling rod roll on the surface-mounted beam that noise resistance nylon backing plate arranged, the exit end design has stop gauge, the manually auxiliary workpiece steel pipe or oil well pipe or drilling rod proper alignment of can making easily distributes when overhead traveling crane hangs material, storing platform stop gauge is an eccentric wheel structure, adjust eccentric wheel in the different angles position for φ 60～φ 139.7, make turn-down rig can only turn over a material at every turn.
Workpiece steel pipe or oil well pipe or drilling rod are delivered to first station by storing platform bin---the positioned in alignment roller-way, the location roller-way is made up of four running rollers and the material feeding switch is housed, wherein the two ends running roller is driven by the driven by motor step-down gear, so that workpiece steel pipe or oil well pipe or drilling rod alignment, when material feeding switch sender, the power running roller makes workpiece steel pipe or oil well pipe or drilling rod translational motion until running into adjustable alignment baffle plate, the alignment baffle plate is regulated as required, makes the alignment of workpiece steel pipe or oil well pipe or drill rod end.
Air pressure stepping feeder is an air-driven material toggling mechanism, can be exactly the workpiece steel pipe on the storing platform or oil well pipe or drilling rod be steadily held up by instruction to be put on the next station support,
Workpiece steel pipe or oil well pipe or drilling rod enter the heating roller-way, and the heating roller-way is mounted on the roller bed frame, the downward-sloping in the horizontal direction 0.3-1 degree of heating roller-way; Install on the heating roller-way several V-type running rollers with the step-down gear of the band frequency control motor of the corresponding setting of V-type running roller, between V-type running roller and V-type running roller load coil is set, workpiece steel pipe or oil well pipe or drilling rod are placed on the V-type running roller, between the axis direction of the rolling axle of V-type running roller and steel pipe or oil well pipe or drilling rod inclination 8-20 °.
The frequency conversion feeder is single roller transmission, and adjustable-speed V-type running roller is the roller feed machine of inclination 8-20 ° layout, have straight feeding correction in and the function of workpiece steel pipe or oil well pipe or drilling rod rotation.Wherein between the heater coil and the feed rolls of import and export be heat-resistance stainless steel, all the other are wear resisting steel.It is downward-sloping that the roller-way of quenching heating zone has been mounted to the 0.3-1 degree, and the aqueous reflux when this can prevent to quench in residual steel pipe or oil well pipe or the drilling rod is to the quenching heating zone.
Variable frequency heating power supply, induction heating electric furnace and double color infrared temperature measuring instrument detect workpiece steel pipe or oil well pipe or drilling rod temperature and feed back to intermediate frequency power supply forms closed loop control system.Heating temperature 850-1000 ℃.
Power supply water coolant, distilled water water temperature≤35 ℃ pressure 0.2～0.35MPa
Matching board formula interchanger.
1 of double color infrared temperature measuring instrument is installed in last load coil rear portion and detects workpiece temperature and feed back to intermediate frequency power supply composition closed loop control system.
Workpiece steel pipe or oil well pipe or drilling rod are being heated to about 850 ℃～1000 ℃ through ruhmkorff coil to 5～10 meters/minute speed about by 20 meters/minute on the heat-treatment production line, continuously make the evenly through hardening fully fast of workpiece steel pipe or oil well pipe or drilling rod by the quench spraying and quenching device of system of this spray in second at 5-30, it directly influences the flexural deformation of product and the comprehensive mechanical property of steel pipe.
Described spraying and quenching device comprises spray thrower, water pump, the spray angle regulator of quenching, wherein spray thrower shape ringwise; The water inlet pipe and the water pump of spray thrower join, and spray the angle regulator of quenching and are installed on the spray thrower, and several nozzles are housed on the spray thrower, and the diameter of this nozzle is 1.2-4mm, and the spray configuration of nozzle is cone-shaped or fan shape, and several nozzles are symmetrically arranged; The medullary ray of spraying and quenching device is coaxial with the medullary ray of workpiece steel pipe or oil well pipe or drilling rod.
After quenching, stay water in workpiece steel pipe or oil well pipe or the drilling rod and bring in the tempering coil and set up this station water leaching table in order to remove workpiece steel pipe or oil well pipe or drilling rod, it is long 12 meters, wide 1.2 meters, and tilt, adopting the Pneumatic charging machine that the workpiece steel pipe on the roller-way or oil well pipe or drilling rod are held up is placed on the water leaching table, residuary water in workpiece steel pipe or oil well pipe or the drilling rod is spilt in the pipe, behind the several minutes, lift by the Pneumatic charging machine and to serve on the tempering line roller-way.
Described water leaching table is made up of some guide rails, non-being arranged in parallel between every guide rail and guide rail, water leaching table is inclination on two directions, one of them direction is that water leaching table is at the axis direction inclination 2-5 of workpiece steel pipe or oil well pipe or drilling rod degree, another direction is to be between every guide rail of water leaching table to intersect to tilt, and the pitch angle is increased between the 2-20 degree by root.
Tempering Frequency Induction Heating district variable frequency induction heating power supply, load coil are formed tempering induction heating part and double color infrared temperature measuring instrument closed loop system.(double color infrared temperature measuring instrument adopts double-colored optical fiber infrared thermometer, its model RAYFRIASF001) Heating temperature 500-720 ℃.
Power supply water coolant, distilled water water temperature≤35 ℃ pressure 0.2～0.35MPa
Matching board formula interchanger.
Double color infrared temperature measuring instrument is installed in last cover heater coil rear portion and detects workpiece steel pipe or oil well pipe or drilling rod temperature and feed back to intermediate frequency power supply, forms closed loop control system.
Adopt the induction of two kinds of internal diameters to add workpiece steel pipe or oil well pipe or the drilling rod heating that coil satisfies φ 60.3～φ 88.9 and φ 114.3～φ 139.7 specifications in the present embodiment.15 of quenching one district's heater coils, 6 of quenching two district's heater coils, 10 of tempering one district's heater coils, 6 of tempering two district's heater coils, coil can satisfy the cooling under the overall loading situation with accurate cold drawn rectangle copper tube, employing water cooling.Be coated in coil inside with the special high temperature material of import disconnected reliably heat and insulation are provided.Coil is handled through insullac repeatedly and is reached complete insulating requirements.
Workpiece steel pipe after the process tempering or oil well pipe or drilling rod are mixed descaling device on roller-way, the structure of this device is ringwise loop pipe, a uniform distribution 8-12 Wimet is the nozzle of fan shape on the tube wall of loop pipe, 60-80 ° of inclination arranged between the jet axis of nozzle and steel pipe or oil well pipe or the drilling rod, and the water inlet pipe of loop pipe connects high-pressure hydraulic pump.Its water pressure is controlled at 200-300Kg/cm
2, flow control is at 8-20m
3/ h.
Penetrate and on workpiece steel pipe or oil well pipe or drilling rod wall, reach the oxide skin of removing tube-surface, fished pipe or oil well pipe or drilling rod surface-brightening are true qualities, and can make workpiece steel pipe or oil well pipe or drilling rod temperature cooling 50～80 degree, thereby shorten cold bed length.This device is by an outer steel shell, hurts sb.'s feelings and reduces the loss of water in order to prevent the high pressure water splash, also is provided with filtration unit and collects oxide skin, and water after filtering utilizes again.
The finished product material is delivered to discharging platform (cold bed) through air pressure stepping feeder, because workpiece temperature about 500 ℃, increases to 8 for preventing the workpiece deformation guide rail, length increases, and can progressively lower the temperature like this.
The control of production line on line is that the action of equipment in the Manufacturing Automated process is unified to handle, by message exchange, realize by preset program, the certain hour beat, rhythmical on line is worked automatically, it and all equipment that participate in producing automatically of unit all have relation, make each equipment by the processing requirement co-ordinate motion.
This electrical control system is selected Siemens S7-315/2DP programmable logic controller PLC for use; can realize unit adjustment control, manually control, semiautomatic controls, full automatic control; while is according to the processing requirement of unit; each equipment component on the unit is realized the interlock protection function; the fault-operation protection function; various working ordeies and every equipment component action Presentation Function; S7-315/2DP detects limit switch signal; pressure sensor signal is carried out corresponding processing sequence respectively according to operational order (as various dutys, action button).Because S7-315/2DP has abundant time variable control order, can make Controlling System finish all process control tasks of unit and speed governing positioning function effectively, under automatic mode of operation, as long as satisfying, starting condition presses auto-start button, program is just once finished the needed whole actions of whole unit by the process system of selected (different diameter of steel tube and material), and begins next round-robin sampling action in a loop cycle action on finishing.
Claims (5)
1, steel pipe, oil well pipe and drilling rod Frequency Induction Heating heat treating method is characterized in that the processing step of this method is divided into,
(1) storing platform on the workpiece: workpiece steel pipe or oil well pipe or drilling rod proper alignment on the storing platform: storing platform table top inclination 2-5 degree, workpiece is hung on the storing platform by overhead traveling crane, the automatic sequential proper alignment; Storing platform stop gauge is an eccentric wheel structure, adjusts eccentric wheel in the different angles position for φ 60～φ 139.7, makes turn-down rig can only turn over a material at every turn;
(2) the automatic positioned in alignment of workpiece: workpiece steel pipe or oil well pipe or drilling rod are delivered to first station by storing platform bin---the positioned in alignment roller-way, the location roller-way is made up of four running rollers and the material feeding switch is housed, wherein the two ends running roller is driven by the driven by motor step-down gear, so that the workpiece alignment;
(3) workpiece enters the heating roller-way: workpiece steel pipe or oil well pipe or drilling rod enter the heating roller-way, carry out even heating, tilt at the heating roller-way V-type running roller and frequency control motor and step-down gear are installed, the V-type roller speed adopts speed control by frequency variation, by inductor block operation stepping feeder the workpiece on the alignment frame is lifted reposefully, roll and deliver on the frequency conversion feeder that is inclination 8-20 ° installation, the speed forward feeding of frequency conversion feeder to set, the frequency conversion feeder is single roller transmission, speed, adjustable height, workpiece steel pipe or oil well pipe or drilling rod are placed in rotation in load coil on the V-type running roller, to workpiece steel pipe or oil well pipe or drilling rod even heating;
(4) quenching induction heating: workpiece steel pipe or oil well pipe or drilling rod enter quenching Frequency Induction Heating district through the heating roller-way, this heating zone is joined many group heat induced coils by the different intermediate frequency power supply of two cover power and is formed quenching induction heating district, and Heating temperature guarantees the even of workpiece temperature for 850 ℃-1000 ℃;
(5) closed loop thermal control: the temperature that double color infrared temperature measuring instrument carries out monitoring workpiece is installed in the exit at load coil, and the output rating of signal feedback being regulated automatically intermediate frequency power supply to intermediate frequency power supply, form closed loop control system, control product technological temperature is in the limit of error that allows;
(6) make workpiece evenly through hardening fully rapidly with the continuous spray of line: workpiece steel pipe after the heating or oil well pipe or drilling rod enter the spray quench district, adopt spraying and quenching device continuously water flow jet to be arrived heated steel tube surface, complete through hardening tube wall, the effect of quick Homogeneouslly-radiating, the strong spray 5-30 second, select two cover big-flow high-pressure water pumps for use, pressure is 125 meters water cycle amount 1000m hourly of lift
3/ h, total power guarantees that the steam film that workpiece surface is produced destroys more than 500kW;
(7) water leaching table on the workpiece: the water that removal workpiece steel pipe or oil well pipe or drilling rod are stayed in the pipe after quenching is brought in the tempering coil, utilize water leaching table to tilt to reach the purpose that dewaters in two directions, a direction tilts to make workpiece steel pipe or oil well pipe or drilling rod automatic shifting, another direction is 2-5 ° of workpiece steel pipe or oil well pipe or the inclination of drill rod axis direction, make workpiece steel pipe or oil well pipe or drilling rod on water leaching table during automatic shifting, make the water in workpiece steel pipe or oil well pipe or the drilling rod drop down light, behind the several minutes, lift by the Pneumatic charging machine and to serve on the tempering line roller-way;
(8) tempering induction heating: the workpiece rotation on roller-way that enters on the tempering induction heating district roller-way moves forward, and enters tempering heating in medium frequency coil and carries out the tempering heating;
(9) infrared measurement of temperature closed-loop control: double color infrared temperature measuring instrument is measured temperature signal by after the electrical apparatus control system signal processing, and the closed loop thermal Controlling System is formed in the power output of regulation and control intermediate frequency power supply;
(10) oxide skin of removing workpiece surface; Workpiece steel pipe after the tempered heating or oil well pipe or drilling rod are transported to the de-scaling station by roller-way, carry out de-scaling by the descaling device on the de-scaling station, remove the oxide compound of workpiece surface;
(11) cold bed: workpiece steel pipe after the de-scaling or oil well pipe or drilling rod enter cold bed station signal through the electrical apparatus control system signal processing, and mechanical manipulator is turned to the workpiece on the roller-way on the cold bed.
2, steel pipe according to claim 1, oil well pipe and drilling rod Frequency Induction Heating heat treating method is characterized in that described processing step (1)-(11) are to carry out under the programming Control of electrical apparatus control system, as processing step:
(1) storing platform on the workpiece: be contained in first, second transmitter on the storing platform, the signal of gathering is inserted electrical apparatus control system first signal input part corresponding with it, second signal input terminus by its first, second output terminal, after the electrical apparatus control system signal processing, the material loading signal by the signal input part in first output terminal access warning device of electrical apparatus control system, is sent sound, light notice material loading; Second output terminal of electrical apparatus control system inserts the input terminus of first mechanical manipulator on the alignment station, send null signals by first mechanical manipulator, this null signals treats that electrical apparatus control system sends the material loading signal, sends the material loading signal by first mechanical manipulator of electrical apparatus control system on the alignment station;
(2) the automatic positioned in alignment of workpiece: the 3rd transmitter in the station alignment means will have the signal of workpiece material to insert electrical apparatus control system three signal input part corresponding with it by its 3rd output terminal, after the electrical apparatus control system signal processing, the material loading signal is inserted the input terminus of station alignment means by electrical apparatus control system the 3rd signal output part, send the material loading signal to the station alignment means, prepare for whether next step enters the heating roller-way;
(3) workpiece enters the heating roller-way: workpiece steel pipe or oil well pipe or drilling rod drive running roller forward by the speed control by frequency variation machine, leave the material loading position, the four-sensor of heating on the roller-way inserts electrical apparatus control system four signal input part corresponding with it with the signal that workpiece steel pipe or oil well pipe or drilling rod leave the material loading position by its 4th signal output part, after the electrical apparatus control system signal processing, the material loading signal inserts the input terminus of second mechanical manipulator in the heating roller-way by electrical apparatus control system the 4th signal output part, and, carry out next workpiece material loading with the material loading signal that above-mentioned alignment means is sent;
(4) quenching induction heating: the rotation and moving forward on the heating roller-way of workpiece steel pipe or oil well pipe or drilling rod, the speed that moves enters the electric induced line collar region by the control of speed control by frequency variation machine, and the induction even heating quenches.
(5) closed loop thermal Controlling System: the temperature signal that double color infrared temperature measuring instrument is measured inserts electrical apparatus control system five signal input part corresponding with it by the 5th transmitter the 5th signal output part, after the electrical apparatus control system signal processing, the power signal of regulation and control heating in medium frequency power supply inserts the input terminus of heating in medium frequency power supply by electrical apparatus control system the 5th signal output part, power by electrical apparatus control system regulation and control heating in medium frequency power supply, make workpiece reach the temperature of technique initialization, form the closed loop thermal Controlling System.
(6) make workpiece evenly through hardening fully rapidly with the continuous spray of line: the workpiece steel pipe behind the even heating or oil well pipe or drilling rod, enter the spraying and quenching device in the spray quench district, carry out quench treatment, make workpiece steel pipe or oil well pipe or the complete through hardening of drilling rod, the workpiece steel pipe of through hardening or oil well pipe or drilling rod enter the draining district fully.
(7) residuary water in the workpiece spills outside the workpiece on water leaching table: the 6th transmitter on the draining district roller-way, the signal that workpiece is put in place inserts electrical apparatus control system six signal input part corresponding with it by the 6th signal output part of this transmitter, after the electrical apparatus control system signal processing, the signal that workpiece steel pipe or oil well pipe or drilling rod are translated on the water leaching table passes through the input terminus that electrical apparatus control system the 6th signal output part inserts the 3rd mechanical manipulator in the draining district, by the 3rd mechanical manipulator the workpiece on the draining district roller-way is translated on the water leaching table, stop after several minutes, automatic draining, the residence time is controlled by electrical apparatus control system, simultaneously workpiece steel pipe or oil well pipe or the drilling rod signal that is transported to tempering line induction heating district connects the input terminus of the 4th mechanical manipulator by electrical apparatus control system the 6th signal output part, manipulator behavior is transported to tempering line induction heating district with workpiece steel pipe or oil well pipe or drilling rod.
(8) tempering induction heating: enter workpiece steel pipe on the tempering induction heating district roller-way or oil well pipe or drilling rod rotation on roller-way and move forward, enter tempering heating in medium frequency coil and carry out the tempering heating.
(9) infrared measurement of temperature closed loop control system: double color infrared temperature measuring instrument is measured temperature signal insert electrical apparatus control system seven signal input part corresponding with it by the 7th transmitter the 7th signal output part, after the electrical apparatus control system signal processing, the power output signal of regulation and control intermediate frequency power supply is inserted the input terminus of intermediate frequency power supply by electrical apparatus control system the 7th signal output part, the closed loop temp testing controlling system is formed in the power output of regulation and control intermediate frequency power supply.
(10) oxide skin of removing workpiece surface; Workpiece steel pipe after the tempered heating or oil well pipe or drilling rod are transported to the de-scaling station by roller-way, carry out de-scaling by the descaling device on the de-scaling station, remove the oxide compound of workpiece surface.
(11) cold bed: the workpiece after the de-scaling enters the cold bed station, workpiece steel pipe or oil well pipe or drilling rod logical its 8th signal output part of signal that enters the cold bed station after with de-scaling of the 8th transmitter on this cold bed station district roller-way inserts electrical apparatus control system eight signal input part corresponding with it, through the electrical apparatus control system signal processing, the signal that workpiece steel pipe on the roller-way or oil well pipe or drilling rod are turned on the cold bed inserts the input terminus of the 5th mechanical manipulator by electrical apparatus control system the 8th signal output part, and the 5th mechanical manipulator is turned to the workpiece steel pipe on the roller-way or oil well pipe or drilling rod on the cold bed.
3, steel pipe according to claim 1, oil well pipe and drilling rod Frequency Induction Heating heat treating method is characterized in that described heating roller-way is mounted on the roller bed frame, the downward-sloping in the horizontal direction 0.3-1 degree of heating roller-way; Install on the heating roller-way several V-type running rollers with the step-down gear of the band frequency control motor of the corresponding setting of V-type running roller, between V-type running roller and V-type running roller load coil is set, workpiece steel pipe or oil well pipe or drilling rod are placed on the V-type running roller, between the axis direction of the rolling axle of V-type running roller and steel pipe or oil well pipe or drilling rod inclination 8-20 °.
4, steel pipe according to claim 1, oil well pipe and drilling rod Frequency Induction Heating heat treating method, it is characterized in that described water leaching table is made up of some guide rails, non-being arranged in parallel between every guide rail and guide rail, water leaching table is inclination on two directions, one of them direction is the axis direction inclination 2-5 degree of workpiece steel pipe or oil well pipe or drilling rod on the water leaching table, another direction is to be the intersection inclination between every guide rail on the water leaching table, and the pitch angle is increased between the 2-20 degree by root.
5, steel pipe according to claim 1, oil well pipe and drilling rod Frequency Induction Heating heat treating method is characterized in that described spraying and quenching device is to comprise spray thrower, water pump, the spray angle regulator of quenching, wherein spray thrower ringwise shape distribute; The water inlet pipe and the water pump of spray thrower join, and spray the angle regulator of quenching and are installed on the spray thrower, and several nozzles are housed on the spray thrower, and the diameter of this nozzle is 1.2-4mm, and the spray configuration of nozzle is cone-shaped and fan shape, and several nozzles are symmetrically arranged; The medullary ray of spraying and quenching device is coaxial with the medullary ray of workpiece steel pipe or oil well pipe or drilling rod.
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Application publication date: 20071128 Assignee: Suzhou Zhenwu Electric Furnace Co., Ltd. Assignor: Zhu Xingfa Contract record no.: 2013320010030 Denomination of invention: Medium frequency induction heating treatment method for steel pipe, petroleum well pipe and drill pipe Granted publication date: 20081001 License type: Exclusive License Record date: 20130318 |
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