CN104651578B - Sweating heat process medium frequency induction heater - Google Patents
Sweating heat process medium frequency induction heater Download PDFInfo
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- CN104651578B CN104651578B CN201510054211.8A CN201510054211A CN104651578B CN 104651578 B CN104651578 B CN 104651578B CN 201510054211 A CN201510054211 A CN 201510054211A CN 104651578 B CN104651578 B CN 104651578B
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The present invention relates to a kind of induction heating equipment of medium frequency, a kind of sweating heat process medium frequency induction heater, it is coiled into the coil of spring-like by metallic conductor, metallic conductor uses multiply soft annealed wire to stir and makes the cross section reaching certain, numerical value × 0.8 that numerical value that the cross-sectional area of metallic conductor is corresponding is corresponding more than or equal to the maximum heating power of medium frequency induction heater, numerical value × 2 corresponding less than or equal to the maximum heating power of medium frequency induction heater, the medium frequency induction heater induction coil of the present invention and heated metallic conduit are also not directly contacted with, it is fixed on outside metallic conduit heat-preservation cotton, one root length coil can be divided into several sections of short coils by the medium frequency induction heater of the present invention, winding limit, limit connects into one whole sensing heater, operate lighter.Using self cooling mode, without any cooling liquid, midway has a power failure and has no effect induction heater coils.
Description
Technical field
The present invention relates to a kind of induction heating equipment of medium frequency, a kind of sweating heat process medium frequency induction heater, belong to pipeline
Welding technical field of auxiliary equipment.
Background technology
In China power station, chemical industry construction, the process of alloy pipeline sweating heat is main at present uses the additional heat-preservation cotton of ceramic resistor heater to enter
OK.Shortcoming is pipe welding seam inside and outside wall excessive temperature differentials, and weld hardness is high, poor toughness, and thermal treatment quality is low, and the remnants of weld seam should
Power is big, and many power stations, because this reason uses less than 10 years weld seams and just creates crackle, can only be cut off again to weld and even change
Whole piece pipeline (projected life should be 30 years).And this material is completely dependent on, from ground imports such as Japan, the U.S., wasting huge；
The haze that exploitation ceramic ore and porcelain piece arrange carbon and generation in kiln sintering procedure is serious to environmental disruption and irrecoverable.Frangible
Cannot be recycled with the pottery scrapped, be decomposed hardly, then cause secondary pollution.
The series resonance heat treatment intermediate frequency power supply frequency of a small amount of import is higher, typically at more than 5000Hz, and work process medium frequency
Change greatly, up to Hz more than 20000.Load inductance amount is less, and the load inductance amount of a 35KW intermediate frequency power supply requires
Between 5 μ H-50 μ H, the external diameter 560mm of the main steam pipe of 1,000,000 kilowatts of thermoelectricitys of China, pipe thickness reaches 115mm, code
Require sensing width of heating to be wall thickness more than 6 times, induction coil minimum widith is 690mm, if meeting width must strengthen sense
The turn-to-turn that should enclose away from, workpiece temperature can be caused uneven, and power is little cannot meet technological requirement.Load line distributed inductance must not
More than 10 μ H, excessive inductance value can reduce workpiece heat power.And operating radius is little, specific position workpiece farther out without
Method carries out heat treatment, and imported product cost is higher.And the tank circuit inductive heater of series resonance is the company of series connection with resonant capacitance
Connecing, once lose a start pulse signal due to interference, the tank circuit stops concussion immediately, and heat treatment can be forced to interrupt.
Generally power station chemical industry P91, P92 class heat resisting steel post weld heat treatment temperature is about 760 DEG C, and curie point 740 DEG C, when 760
Depth of penetration heating during DEG C constant temperature is 500 ÷ (frequencies)1/2(mm)；Visible frequencies is the highest, diathermanous the most shallow, the inside and outside wall temperature difference of pipeline
The biggest, thermal effectiveness is the poorest.But the kelvin effect of frequency more high capacity line is the biggest, and line can be overheated, current-carrying capacity declines.35KW
Above all employings water cable power supply, due to construction first field bad environments, often because of artificial damage disorderly closedown.The sensing of water-cooled adds
Hot device is also because burst power-off fault can not get circulating water, and leakage to heat treated part makes its damage that quenches.
Summary of the invention
The technical problem to be solved is, the shortcoming existed for above prior art, proposes a kind of sweating heat and processes use
Medium frequency induction heater, by designing accurately, frock is simple, and is unlikely to make heating collar overheated and burn out insulating barrier, can be
Frequency is 700Hz-2500Hz, and the electromagnetic transfer that the medium frequency alternating current of voltage 0-750V produces through medium frequency induction heater is given and wanted
The metallic conduit workpiece of heating, electromagnetism produces electric energy through duct work sensing, and electric energy is heat energy at metallic conduit inner transformation therewith
Carrying out heat treatment, pressure 2000V exchange does not punctures for one minute, improves the thermal effectiveness of heater induction coil.
The present invention solves the technical scheme of above technical problem:
A kind of sweating heat processs medium frequency induction heater, it is coiled into the coil of spring-like by metallic conductor, coil and being heated
Metallic conduit and be not directly contacted with, be fixed on (insulation thickness 40mm-100mm) outside metallic conduit heat-preservation cotton, frequency be
700Hz-2500Hz, voltage is that the electromagnetic transfer that produces through medium frequency induction heater of the medium frequency alternating current of 0-750V is to be heated
Metallic conduit workpiece, electromagnetism produces electric energy through duct work sensing, and electric energy is that heat energy carries out heat at metallic conduit inner transformation therewith
Process；The cross-sectional area of metallic conductor is set as: the numerical value that the cross-sectional area of metallic conductor is corresponding is more than or equal to Medium frequency induction
Numerical value × 0.8 that the maximum heating power of heater is corresponding, the number corresponding less than or equal to the maximum heating power of medium frequency induction heater
Value × 2, wherein the unit of the cross-sectional area of metallic conductor is mm2, the unit of the heating power of medium frequency induction heater is KW.
The technical scheme that the present invention limits further is:
Aforesaid sweating heat process medium frequency induction heater, wherein metallic conductor is a length of: 3.14 × D × N, it is allowed to
Error is+10%, i.e. length≤3.14 × D × N × 110% of 3.14 × D × N≤metallic conductor, the length of metallic conductor
Unit is cm；Wherein, N is the number of turn of described coil, and unit is circle, N=(L × l+0.45 × l × D)1/2÷ (0.083 × D),
In above formula, D is the interior diameter that the interior diameter of the cross section of described coil, i.e. coil are formed cylindrical cross section, and unit is
cm；L be described coil inductance value, unit is μ h；L is the length of coil, and the cylindrical bottom surface that i.e. coil is formed is extremely
The vertical dimension of end face, unit cm.
Aforesaid sweating heat process medium frequency induction heater, wherein metallic conductor can use the strand copper wire system of stirring to reach certain
Cross section, for copper material, numerical value corresponding to the cross-sectional area of metallic conductor is more than or equal to the maximum of medium frequency induction heater
Numerical value × 0.8 that heating power is corresponding, numerical value × 2 corresponding less than or equal to the maximum heating power of medium frequency induction heater.
Aforesaid sweating heat process medium frequency induction heater, wherein metallic conductor can use the multiply aluminum steel system of stirring to reach certain
Cross section, for aluminium material, numerical value corresponding to the cross-sectional area of metallic conductor is more than or equal to the maximum of medium frequency induction heater
Numerical value × 1 that heating power is corresponding, numerical value × 2 corresponding less than or equal to the maximum heating power of medium frequency induction heater.
Aforesaid sweating heat process medium frequency induction heater, wherein connects one long coil of composition, i.e. by least two coil
One root length coil can be divided into several sections of short coils, and winding limit, limit connects into one whole sensing heater, and operation is relatively lighter, adopts
Using self cooling mode, without any cooling liquid, midway has a power failure and has no effect induction heater coils.
Aforesaid sweating heat process medium frequency induction heater, is wherein enclosed with high temperature insulating material outside metallic conductor.
Aforesaid sweating heat process medium frequency induction heater, wherein high temperature insulating material is polyimide foam insulation, Teflon
Insulant, fiberglass insulation, ceramic fiber insulation or structural ceramics pipe insulation material.
Aforesaid sweating heat process medium frequency induction heater, wherein insulating layer thickness standard degree is that pressure 2000V exchanges one minute not
Puncture.
Aforesaid sweating heat process medium frequency induction heater, wherein D is by the external diameter+insulation of the metallic conduit pipeline of coil heats
Thickness × 2 (unit: cm).
Aforesaid sweating heat process medium frequency induction heater, wherein metal wire is copper cash or aluminum steel.
In prior art, Medium frequency induction sweating heat processes heater and is mainly water-cooling type, is to be wound on heated pipe by single water power cable
Outside the heat-preservation cotton in road, due to cannot segmentation, the labor intensity of cable false twist's operations of single about 50 meters is very big,
In heat treatment process, pipe temperature is up to about 760 DEG C, and heat-preservation cotton temperature outside is also up to 200 DEG C and has a surplus, and at this moment needs the most not
Discontinuous cycle coolant is to sensing heater cooling, and it is out of service that field accident power-off will result in sensing heater circulating pump,
Melt immediately less than the heater aqueduct of cooling, cooling liquid infiltered should the pipeline that processes of sweating heat, counter cause quenching existing
As, cause damage；In order to solve above technical problem, present inventor is found by research, can use metallic conductor around
The coil becoming spring-like can use multiply soft as sweating heat process medium frequency induction heater, i.e. medium frequency induction heater electric conductor
The metal wire system of stirring reaches certain cross section, can wrap up high temperature insulating material and carry out effective and safe insulation processing outside wire, resistance to
Pressure 2000V exchange does not punctures for one minute, it is also possible to directly uses copper or aluminum bare conductor to heat, selects in good time, thus ingenious
Solve above technical problem；But the determination of the cross-sectional area of metallic conductor is most important, section selection is the least easily
Cause load coil overheated and burn out insulation, the most uneconomical, frock difficulty；Present inventor is found by research,
Numerical value corresponding for the cross-sectional area of metallic conductor is arranged to the copper maximum heating power pair more than or equal to medium frequency induction heater
Numerical value × 0.8 answered, numerical value × 2 corresponding less than or equal to the maximum heating power of medium frequency induction heater, during aluminum matter is more than or equal to
Frequently numerical value × 1 that the maximum heating power of sensing heater is corresponding, corresponding less than or equal to the maximum heating power of medium frequency induction heater
Numerical value × 2, above technical problem can be readily solved, and is fixed on (insulation thickness 40mm-100mm) outside metallic conduit heat-preservation cotton,
Can be 700Hz-2500Hz frequency, the electromagnetic transfer that the medium frequency alternating current of voltage 0-750V produces through medium frequency induction heater
Giving metallic conduit workpiece to be heated, electromagnetism produces electric energy through duct work sensing, and electric energy at metallic conduit inner transformation is therewith
Heat energy carries out heat treatment, and pressure 2000V exchange does not punctures for one minute.
Accompanying drawing explanation
Fig. 1 is the medium frequency induction heater drive circuit schematic diagram of the embodiment of the present invention 1.
Detailed description of the invention
Embodiment 1
The present embodiment provides a kind of sweating heat process medium frequency induction heater, and it is coiled into the coil of spring-like by metallic conductor, reaches
To driving the inductance value (70uh-200uh) of power requirement, coil and heated metallic conduit are also not directly contacted with, are fixed on gold
Outside metal conduit heat-preservation cotton (insulation thickness 30mm-100mm), being 700Hz-2500Hz frequency, voltage is the intermediate frequency of 0-750V
The electromagnetic transfer that alternating current produces through medium frequency induction heater senses through duct work to metallic conduit workpiece to be heated, electromagnetism
Producing electric energy, electric energy is that heat energy carries out heat treatment at metallic conduit inner transformation therewith, and metallic conductor uses multiply soft annealed wire
The system of stirring reaches certain cross section, and the cross-sectional area of metallic conductor is set as: the numerical value that the cross-sectional area of metallic conductor is corresponding
Copper numerical value × 0.8 corresponding more than or equal to the maximum heating power of medium frequency induction heater, less than or equal to medium frequency induction heater
Numerical value × 2 that maximum heating power is corresponding, numerical value × 1 that aluminum matter is corresponding more than or equal to the maximum heating power of medium frequency induction heater,
Numerical value × 2 corresponding less than or equal to the maximum heating power of medium frequency induction heater, wherein, the list of the cross-sectional area of metallic conductor
Position is mm2, the unit of the heating power of medium frequency induction heater is KW；Metallic conductor a length of: 3.14 × D × N, permits
The error permitted is+10%, and the unit of the length of metallic conductor is cm；
Wherein, N is the number of turn of medium frequency induction heater coil, and unit is circle, N=(L × l+0.45 × l × D)1/2÷ (0.083 × D),
In above formula, D is the interior diameter of the cross section of medium frequency induction heater coil, i.e. by the metallic conduit pipeline of coil heats
External diameter+insulation thickness × 2, unit is cm；
L is the inductance value of medium frequency induction heater, i.e. drives the inductance value of power requirement heater coil, and unit is μ h；
L is the length of medium frequency induction heater, the vertical dimension of the cylindrical bottom surface that i.e. coil is formed to end face, unit cm.
The present embodiment drives the annealing device structure of medium frequency induction heater induction coil as it is shown in figure 1, include in parallel resonance
Frequency power control unit, overcurrent protection sampling unit, temperature control unit, three-phase full-controlled rectifier bridge, DC filtering reactor,
Single-phase bridge inversion unit, temperature measuring unit and medium frequency induction heater, the power supply of parallel resonance intermediate frequency power supply control unit is by single-phase
AC transformer connects power supply；
On the three-phase alternating current of the end of incoming cables that overcurrent protection sampling unit is arranged on three-phase commutation bridge, the letter of overcurrent protection sampling unit
Number outfan is connected with parallel resonance intermediate frequency power supply control unit, the 0-5A electricity that overcurrent protection collecting unit is gathered by transformer
Flow through secondary 50 times boosting after load resistance is decayed, obtain AC signal and the voltage letter of acquisition on voltage transformer of 0-5V again
Number after intermediate frequency power supply control unit rectification contrasts, turn off rectification circuit and inverter circuit, to prevent load overcurrent, overvoltage in good time.
Frequency meter, medium frequency voltmeter instruction real time operation parameter；
The signals collecting termination of intermediate frequency power supply control unit in parallel is sent output signal, temperature control unit by by temperature control unit
Including signal filtering and device temperature controller, temperature controller uses Xiamen space electricity AI-516 series, or selects other models else and can expire
Foot K type thermocouple signal input, temperature controlling range are more than or equal to 0-800 DEG C, the temperature able to programme of retroaction output 4-20mA
Control instrument；Traffic filter uses exchange AC2A1, AC2A3 of LC inductance capacitance type ... or direct current DC2A1, DC2A3 ... requirement
For electric current >=0.5A, voltage >=100V, inductance value >=10uh, the filter module of electric capacity >=680P, mainly eliminate by intermediate frequency sense
The strong magnetic disturbance distorted signal answering heater, load connecting line to send, makes cut-in temperature millivolt signal smoothened, send exactly
To temperature controller thermocouple input.The signal input part of traffic filter is connected with thermometric unit by compensating wire, signal
The signal output part of wave filter is connected with temperature controller signal input part, temperature controller outfan and connect 1K Ω load electricity
Resistance, adjusts temperature control instrument and exports upper and lower amplitude limit so that it is the signal being changed into 0-13V is connected to the merit of intermediate frequency power supply control unit in parallel
Rate regulation signal input part；
Intermediate frequency power supply control unit in parallel sends commutating pulse according to the signal of temperature control unit collection and triggers three-phase fully-controlled rectification
Bridge, three-phase full-controlled rectifier bridge is made up of three MTC silicon controlled modules and capacitance-resistance overvoltage crowbar, the three-phase separate of three-phase alternating current
It is not connected with three MTC silicon controlled modules, the controllable silicon in each MTC silicon controlled module is all parallel with capacitance-resistance overvoltage protection electricity
Road, is converted into unidirectional current by three-phase alternating current through three-phase full-controlled rectifier bridge；The MTC silicon controlled module used needs to reach following main
Want performance: quality is national standard, rated current IT (AV)/IF (AV) >=200A, repeat to be not turned on voltage VDRM/VRRM >=
1200V, is equivalent to 2 KP pipe series connection in each module, control line K1G1 to K6G6 is connected with intermediate frequency control unit, and insulation dissipates
Hot device, forced air cooling.By the RC overvoltage protection overvoltage crowbar that capacitance resistance is in series, rectification thyristor is prevented for 6 groups
Overvoltage protection；From the unidirectional current of rectifier bridge output through the DC filtering reactor of more than 160A4mh to half-bridge converter unit；
From the unidirectional current of three-phase full-controlled rectifier bridge output through DC filtering reactor to single-phase bridge inversion unit, single-phase bridge is inverse
Become unit mainly by four quick controllable silicons of KK and with four respectively controllable silicon quick with KK capacitance-resistance overvoltage crowbar in parallel form,
Tetra-quick controllable silicons of KK two-by-two one group be connected in parallel, intermediate frequency power supply control unit in parallel the inversion trigger pulse triggers list sent
Quick controllable silicon in phase inverter bridge, wherein four KK quick controllable silicon parameters are rated current IT (AV) >=300A, repeat not
Conducting voltage VDRM/VRRM >=1600V, turn-off time Tq≤30us.The inversion pulse signal that intermediate frequency control unit sends is through 2
Being connected to 4 quick SCR control of KK after group transformer isolation extremely go up, SCR7 Yu SCR8 is one group, SCR9 with SCR10 is
One group, these 2 groups of KK pipes are controlled alternate conduction by intermediate frequency control unit, with pressure >=750V；Frequency >=2500Hz；Capacity is big
Inductance value in the resonant capacitance and its parallel connection that are less than or equal to 1200Kvar equal to 500Kvar is more than or equal to 70uh and is less than or equal to
200uh medium frequency induction heater interacts, and produces 700Hz-2500Hz intermediate frequency power supply and heats pipe welding seam.At KK
Conductive heat sink, forced air cooling are installed in controllable silicon both sides.Four groups electric by the RC overvoltage protection overvoltage protection that capacitance resistance is in series
Road carries out effective anti-overvoltage protection to KK controllable silicon.The Temperature Feedback of pipe welding seam, to temperature control unit, forms closed loop intermediate frequency sense
Answer pipeline welding heat treatment temperature automatic control system；Two groups of quick controllable silicon lead lines are connected intermediate frequency after resonant capacitance parallel connection
Sensing heater induction coil, in the 700Hz-2500Hz that quick controllable silicon, resonant capacitance and medium frequency induction heater effect produce
Frequently heating power supply is by heating duct work in medium frequency induction heater, the temperature of duct work to be heated by temperature measuring unit through mending
Repay wire and feed back to temperature control unit.
It is additionally provided with diverter between three-phase full-controlled rectifier bridge and DC filtering reactor, diverter connects respectively by DC current
Table and D.C. voltmeter.
The system power supply of the present embodiment must according to first open control loop, after open major loop, power-off must first break major loop, break afterwards
Controlling this order in loop to carry out, no side can damage equipment.Controlling normally opened button in power switch circuit is " controlling power supply to open ",
Normally closed button is " controlling power supply to close ", and 1J is to control power supply relay.Main power switch circuit is supplied power to through 1J normally opened contact.
In main power switch circuit, normally opened button is " main power source leaves ", and normally closed button is " main power source pass ", and 1C is main power source catalyst.
One auxiliary of 1C is normally opened in parallel with " controlling power supply to close ", and another of 1C assists normally opened and " main power source leaves " self-locking.1J's
Another assists normally opened and " controlling power supply to open " self-locking.When opening medium-frequency heat processing equipment power supply, it is necessary to first open and " control power supply
Open ", at this moment, after intermediate frequency control unit, temperature control unit, main power switch circuit and radiator fan group normal power supply the most again
Open " main power source leaves ", 1C contactor coil adhesive after main power source unlatching, major loop normal power supply.During shutoff equipment, it is necessary to
First by " main power source breaks ", then by " controlling power supply to break ".If major loop is first opened in maloperation, do not inhale owing to controlling loop relay
It is invalid that conjunction can not get power operation, as being first turned off controlling loop, now " controls power supply to close " to be pinned by major loop normally opened contact 1C
It is invalid to operate, and therefore all ignores maloperation, is effectively protected equipment.
Medium frequency induction heater induction coil uses multiply annealed copper wire or aluminum conductor to stir and makes the cross section reaching certain, outside wire
Parcel high temperature insulating material carries out effective and safe insulation processing, and high temperature insulating material can not puncture for one minute in pressure 2000V exchange；
Conductive section (mm can be selected according to heating power size2) copper: more than or equal to the maximum heating power (KW) of medium frequency induction heater
Corresponding numerical value × 0.8, less than or equal to maximum heating power correspondence numerical value × 2 of medium frequency induction heater.Aluminum matter: in being more than or equal to
Corresponding numerical value × 1 of maximum heating power (KW) of frequency sensing heater, less than or equal to the maximum heating power of medium frequency induction heater
Corresponding numerical value × 2.
Example 60KW power copper section is typically chosen 48mm2Above (60 × 0.8), 80KW power copper section is at 64mm2Above
(80 × 0.8), 100KW power copper section is at 80mm2Above (100 × 0.8), 60KW power aluminum steel cross section is typically chosen 60mm2
Above (60 × 1), 80KW power aluminum steel cross section is at 80mm2Above (80 × 1), 100KW power aluminum steel cross section is at 100mm2With
Go up (100 × 1) by that analogy.Economic voltage loss is the least, and to easily cause load coil overheated and burn out insulation, too very much not
Economy, frock difficulty.
In the selection of insulating layer material, to the heat-preservation cotton temperature outside less than or equal to 250 DEG C, it is generally selected polyimide insulative
Layer, its feature: heatproof is high, light, easy to maintenance.To the heat-preservation cotton temperature outside less than or equal to 260 DEG C, it is generally selected spy
Fluorine dragon insulating barrier, its feature: heatproof is high, light, easy to maintenance, wear-resisting.To temperature outside the heat-preservation cotton less than or equal to 400 DEG C
Degree, generally selects fiberglass insulation, its feature: heatproof is high, light, easy to maintenance, and resistance to tensile strength is high.To being less than
Heat-preservation cotton temperature outside equal to 500 DEG C, is generally selected ceramic fiber insulation layer, is characterized in: heatproof is high, insulation height, gently
Just, easy to maintenance.To the heat-preservation cotton temperature outside less than or equal to 600 DEG C, it is generally selected structural ceramics pipe insulation layer, its feature:
Heatproof is high, good heat dissipation, insulation height, the supply frequency high heat insulation effect of heat-preservation cotton (the heat-preservation cotton temperature outside height depend on).
If not using insulating barrier, selection naked copper wire-heated induction coil, its feature: heat-preservation cotton temperature outside may be up to 700 DEG C,
Safe turn-to-turn fixed interval (FI) >=10mm, supply frequency is high, light, non-maintaining；If selecting naked aluminum conductor heat induced coil, its
Feature: up to 500 DEG C outside heat-preservation cotton, safe turn-to-turn fixed interval (FI) >=10mm, supply frequency is high, lighter, non-maintaining.
In addition to the implementation, the present invention can also have other embodiments.The skill that all employing equivalents or equivalent transformation are formed
Art scheme, all falls within the protection domain of application claims.
Claims (9)
1. sweating heat process medium frequency induction heater, it is coiled into the coil of spring-like by metallic conductor, and described metallic conductor uses the multiply soft annealed wire system of stirring to reach certain cross section, it is characterised in that:
The cross-sectional area of described metallic conductor is set as: numerical value × 0.8 that numerical value that the cross-sectional area of metallic conductor is corresponding is corresponding more than or equal to the maximum heating power of medium frequency induction heater, numerical value × 2 corresponding less than or equal to the maximum heating power of medium frequency induction heater, the unit of the cross-sectional area of wherein said metallic conductor is mm2, the unit of the heating power of described medium frequency induction heater is KW.
2. sweating heat process medium frequency induction heater as claimed in claim 1, it is characterised in that: described metallic conductor a length of: 3.14 × D × N, it is allowed to error be+10%, the unit of the length of described metallic conductor is cm；
Wherein, N is the number of turn of described coil, and unit is circle, N=(L × l+0.45 × l × D)1/2÷ (0.083 × D),
In above formula, D is the interior diameter that the interior diameter of the cross section of described coil, i.e. coil are formed cylindrical cross section, and unit is cm；
L be described coil inductance value, unit is μ h；
L is the length of coil, the vertical dimension of the cylindrical bottom surface that i.e. coil is formed to end face, unit cm.
Sweating heat process medium frequency induction heater the most according to claim 1 and 2, it is characterized in that: described metallic conductor uses strand copper wire to stir and makes the cross section reaching certain, numerical value × 0.8 that numerical value that the cross-sectional area of metallic conductor is corresponding is corresponding more than or equal to the maximum heating power of medium frequency induction heater, numerical value × 2 corresponding less than or equal to the maximum heating power of medium frequency induction heater.
Sweating heat process medium frequency induction heater the most according to claim 1 and 2, it is characterized in that: described metallic conductor uses multiply aluminum steel to stir and makes the cross section reaching certain, numerical value × 1 that numerical value that the cross-sectional area of metallic conductor is corresponding is corresponding more than or equal to the maximum heating power of medium frequency induction heater, numerical value × 2 corresponding less than or equal to the maximum heating power of medium frequency induction heater.
Sweating heat process medium frequency induction heater the most according to claim 1 and 2, it is characterised in that: at least two coil is connected one long coil of composition.
Sweating heat process medium frequency induction heater the most according to claim 1 and 2, it is characterised in that: it is enclosed with high temperature insulating material outside described metallic conductor.
Sweating heat process medium frequency induction heater the most according to claim 6, it is characterised in that: described high temperature insulating material is polyimide foam insulation, Teflon insulant, fiberglass insulation, ceramic fiber insulation or structural ceramics pipe insulation material.
Sweating heat process medium frequency induction heater the most according to claim 6, it is characterised in that: described high temperature insulating material thickness standard degree is that pressure 2000V exchange does not punctures for one minute.
Sweating heat process medium frequency induction heater the most according to claim 2, it is characterised in that: described D is by external diameter+insulation thickness × 2 of the metallic conduit pipeline of coil heats.
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| CN201510054211.8A CN104651578B (en) | 2015-02-02 | 2015-02-02 | Sweating heat process medium frequency induction heater |
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| CN201510054211.8A CN104651578B (en) | 2015-02-02 | 2015-02-02 | Sweating heat process medium frequency induction heater |
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| CN110646684B (en) * | 2018-06-27 | 2022-06-14 | 北京北方华创微电子装备有限公司 | Heater fault detection device and method, heating system and semiconductor processing equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8505811D0 (en) * | 1985-03-06 | 1985-04-11 | Bekaert Sa Nv | Induction heating |
| IT1281095B1 (en) * | 1995-12-22 | 1998-02-11 | Emmedi S P A | INDUCTION GENERATOR FOR IN-LINE HEATING OF METAL PIPES IN CONTROLLED ATMOSPHERE |
| KR100961790B1 (en) * | 2009-07-09 | 2010-06-07 | (주)영흥산업 | High frequency induction heating device with annealing for rack-bar and rack-bar manufacturing method of the same |
| ES2657993T3 (en) * | 2013-05-14 | 2018-03-07 | Thermatool Corp. | Induction coil with dynamically variable coil geometry |
| CN103572036A (en) * | 2013-10-31 | 2014-02-12 | 中国石油化工股份有限公司 | Tube bundle welding zone stress relief medium frequency heating equipment |
| CN204529913U (en) * | 2015-02-02 | 2015-08-05 | 扬中市盛达电器制造有限责任公司 | A kind of welding heat process medium frequency induction heater |
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