CN204529914U - A kind of pipeline welding thermal treatment intermediate frequency induction heating device - Google Patents
A kind of pipeline welding thermal treatment intermediate frequency induction heating device Download PDFInfo
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- CN204529914U CN204529914U CN201520135732.1U CN201520135732U CN204529914U CN 204529914 U CN204529914 U CN 204529914U CN 201520135732 U CN201520135732 U CN 201520135732U CN 204529914 U CN204529914 U CN 204529914U
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- frequency induction
- intermediate frequency
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- thermal insulation
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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
The utility model is a kind of pipeline welding thermal treatment intermediate frequency induction heating device, comprise Medium frequency induction coil, intermediate frequency power supply, thermal insulation layer and thermopair, thermal insulation layer is wrapped in be needed around heat treated pipe welding seam, the hot junction of thermopair is fixed on to be needed on the temperature sampling point of heat treated pipe welding seam, cold junction is positioned at outside thermal insulation layer, Medium frequency induction coil is by metallic conductor around needing to become spring-like outside outside the thermal insulation layer of heat treated pipeline, and Medium frequency induction coil is connected with intermediate frequency power supply.The utility model thermal effectiveness is good, eliminates unrelieved stress thorough, weld seam long service life after thermal treatment, and structure is simple, energy-conserving and environment-protective.
Description
Technical field
The utility model relates to a kind of welding heat treatment unit, is a kind of pipeline welding thermal treatment intermediate frequency induction heating device specifically, belongs to pipeline welding technical field of auxiliary equipment.
Background technology
Current China power station, chemical industry are built interalloy pipeline welding thermal treatment and are mainly adopted the additional insulating cotton of ceramic resistor well heater to carry out.Shortcoming is pipe welding seam inside and outside wall excessive temperature differentials, weld hardness is high, poor toughness, thermal treatment quality is low, the unrelieved stress of weld seam is large, many power stations just create crackle because this reason uses less than 10 years weld seams, can only cut off and even change whole piece pipeline (life should be 30 years) from new welding.And this material relies on completely from ground imports such as Japan, the U.S., wastes 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 and pottery that is that scrap cannot be recycled, and is decomposed hardly, then causes secondary pollution.
The series resonance thermal treatment intermediate frequency power supply frequency of a small amount of import is higher, and generally at more than 5000Hz, and working process medium frequency changes greatly, and is up to Hz more than 20000.Load inductance amount is less, 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 team pipe of China's 1,000,000 kilowatts of thermoelectricitys, thickness of pipe reaches 115mm, regulatory requirements induction heating width is more than 6 times of wall thickness, and ruhmkorff coil minimum width is 690mm, if meet the turn-to-turn distance that width must strengthen induction coil, workpiece temperature can be caused uneven, and power is little cannot meet processing requirement.Load line distributed inductance must not more than 10 μ H, and excessive inductance value can reduce workpiece heat power.And operating radius is little, specific position workpiece far away cannot be heat-treated, and imported product cost is higher.And the tank circuit inductive heater of series resonance and resonant capacitance are for being connected in series, once due to interference loss start pulse signal, the tank circuit stops concussion immediately, and thermal treatment can be forced to interrupt.
Chemical industry, the tubing alloy content that power station uses is different, there is high alloy P91, P92, X20 class also has low-alloy 12Cr1MoV, 10CrMo910, 15CrMo etc., specification is different, caliber, wall thickness has a long way to go, some caliber is little of Φ 219mm or less, reach greatly Φ 1400mm or larger, wall thickness is from 10mm to 140mm or thicker, sometimes be 12Cr1MoV Φ 273*30mm in site operation process today to manage, just be P92 Φ 560*120mm tomorrow to manage, P91 Φ 1400*30 mm may be the day after tomorrow manage, correct heating power how is selected both will dolly to be drawn to reduce unnecessary waste by ox greatly, also can not draw a hand-cart and cause temperature liter less than preset value by calf, thermal treatment cannot complete.How to select width of heating accurately namely too much can not heat female pipe, physical strength is reduced, also can not heat narrow, make the inside and outside wall temperature difference of weld seam large (high alloy not should more than 30 DEG C), stress relieving is not thorough, cause thermal treatment defective, the pipeline welding thermal treatment intermediate frequency induction heating device of reasonable is the urgent problem solved in industry.
Summary of the invention
Technical problem to be solved in the utility model is: the shortcoming existed for above prior art, and propose a kind of pipeline welding thermal treatment intermediate frequency induction heating device, thermal effectiveness is good, elimination unrelieved stress is thorough, weld seam long service life after thermal treatment, and structure is simple, energy-conserving and environment-protective.
The technical scheme that the utility model solves above technical problem is:
A kind of pipeline welding thermal treatment intermediate frequency induction heating device, comprise Medium frequency induction coil, intermediate frequency power supply, thermal insulation layer and thermopair, thermal insulation layer is wrapped in be needed around heat treated pipe welding seam, the hot junction of thermopair is fixed on to be needed on the temperature sampling point of heat treated pipe welding seam, cold junction is positioned at outside thermal insulation layer, Medium frequency induction coil is by metallic conductor around needing to become spring-like outside outside the thermal insulation layer of heat treated pipeline, and Medium frequency induction coil is connected with intermediate frequency power supply.
The technical scheme that the utility model limits further is:
Aforesaid pipeline welding thermal treatment intermediate frequency induction heating device, the power>=P of intermediate frequency power supply, wherein, P=(d ÷ δ)
1/2× d × δ ÷ 17, unit is KW, d is the outside diameter d needing heat treated pipeline, and unit is cm, δ is the wall thickness needing heat treated pipeline, and unit is cm, the infinite in length system of pipeline;
Metallic conductor around the width of heating of the Medium frequency induction coil needing heat treated pipeline to be formed outward is: L × 70%≤width of heating≤L × 140%, wherein, and L=(d ÷ δ)
1/2× 4.5+ δ × 5.3, unit is that cm(needs heat treated pipeline if high alloy P91, P92 type can take plus deviation, low-alloy 12Cr1MoV, 10CrMo910,15CrMo type needs heat treated pipeline if can take negative deviation, need heat treated pipeline if high low-alloy dissimilar steel connects can take zero deflection calculated value), width of heating is the vertical range of cylindrical bottom surface to end face of Medium frequency induction coil formation;
The width of thermal insulation layer is more than or equal to described width of heating, and the width of thermal insulation layer is that lagging material is wrapped in cylindrical bottom surface that pipeline the is formed vertical range to end face.
Aforesaid pipeline welding thermal treatment intermediate frequency induction heating device, intermediate frequency power supply has automatic temperature control function, and out-put supply frequency is 400Hz-5000Hz.
Aforesaid pipeline welding thermal treatment intermediate frequency induction heating device, is characterized in that: the length of described thermopair is KL, KL >=1/2L+30cm.
Aforesaid pipeline welding thermal treatment intermediate frequency induction heating device, wherein thermal insulation layer is wrapped in centered by weld seam needs around heat treated pipe welding seam, and the width of thermal insulation layer is BL, BL >=width of heating+20cm.
Aforesaid pipeline welding thermal treatment intermediate frequency induction heating device, wherein the thickness of thermal insulation layer is 2cm-10cm.
Aforesaid pipeline welding thermal treatment intermediate frequency induction heating device, wherein metallic conductor becomes spring-like outward centered by weld seam outside the thermal insulation layer of the heat treated pipeline of needs.
Aforesaid pipeline welding thermal treatment intermediate frequency induction heating device, wherein the hot junction of thermopair is fixed on the temperature sampling point of weld seam by the mode that spot welding or iron wire are tied up, and the trend of thermopair is parallel and vertical with Medium frequency induction coil with the heat treated pipeline of need.
Aforesaid pipeline welding thermal treatment intermediate frequency induction heating device, wherein thermopair adopts K type thermocouple, and material is nickel chromium triangle nisiloy or nickel chromium triangle nickel aluminium, and model selects WRN or WRNK.
Aforesaid pipeline welding thermal treatment intermediate frequency induction heating device, wherein thermal insulation layer adopts glass tape or iron wire binding, when adopting iron wire binding, iron wire and ruhmkorff coil need be carried out heat insulation with insulation.
The beneficial effects of the utility model are: pipeline welding thermal treatment intermediate frequency induction heating device structure of the present utility model is simple, and the alloy such as power station, the chemical industry pipeline Medium frequency induction that solves easy to use welds heat treated construction technology problem.First by measure or known obtain all size pipeline outside diameter d and wall thickness δ (infinite in length) by formulae discovery and the output rating accurately selecting intermediate frequency power supply, avoid the too low so that thermal treatment engineering of intermediate frequency power supply power of having no way of with reference to selecting to give up halfway, or because of power excessive, large ox draw dolly waste resource.Welding heat process Main Function is the unrelieved stress eliminating weld seam, but at the heat treated stress also reducing heating zone pipeline mother metal of weld seam simultaneously, causes physical strength to decline; If width of heating L is narrow, can cause the inside and outside wall excessive temperature differentials of weld seam, stress relieving is not thorough; The alloy content different heating width of material also can be distinguished; By width of heating calculation formula of the present invention, best width of heating value can be drawn, obtain high-quality thermal effectiveness, extend the work-ing life of pipeline.
When making performance test to device of the present utility model, be P91 in material, outside diameter d=58cm, δ=8cm(length 1840mm, weather is fine, the highest temperature 38 DEG C, Guangzhou, place) in experiment, need heating intermediate frequency power supply power>=P, P=(58 ÷ 8)
1/2× 58 × 8 ÷ 17=73.5KW, finally select unit type to be RLPC-7200, intermediate frequency power supply power 80KW, width of heating L=(58 ÷ 8)
1/2× 4.5+8cm × 5.3=54.5cm, plus deviation is selected to determine L=60cm, the thick 5cm of insulating cotton, width B L=60cm+20cm=80cm, thermopair length KL=60cm ÷ 2+30cm=60cm, through looking into equipment RLPC-7200 service manual, induction heater electrical conductor adopts cross section 70mm
2copper cash, be wound around the number of turn 20 circle, temperature-rise period peak power output 69KW, constant temperature is after 4 hours, and the inside and outside wall temperature difference is less than 30 DEG C, and effect is ideal.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
embodiment 1
The present embodiment is a kind of pipeline welding thermal treatment intermediate frequency induction heating device, as shown in Figure 1, comprise Medium frequency induction coil, intermediate frequency power supply, thermal insulation layer and thermopair, thermal insulation layer is wrapped in be needed around heat treated pipe welding seam, the hot junction of thermopair is fixed on to be needed on the temperature sampling point of heat treated pipe welding seam, cold junction is positioned at outside thermal insulation layer, Medium frequency induction coil is by metallic conductor around needing to become spring-like outside outside the thermal insulation layer of heat treated pipeline, and Medium frequency induction coil is connected with intermediate frequency power supply.
Wherein power>=the P of intermediate frequency power supply, wherein, P=(d ÷ δ)
1/2× d × δ ÷ 17, unit is KW, d is the outside diameter d needing heat treated pipeline, and unit is cm, δ is the wall thickness needing heat treated pipeline, and unit is cm; Metallic conductor around the width of heating of the Medium frequency induction coil needing heat treated pipeline to be formed outward is: L × 70%≤width of heating≤L × 140%, wherein, and L=(d ÷ δ)
1/2× 4.5+ δ × 5.3, unit is cm, high alloy P91, P92 type can take plus deviation, low-alloy 12Cr1MoV, 10CrMo910,15CrMo type can take negative deviation, high low-alloy dissimilar steel connects can take zero deflection calculated value, and width of heating is the vertical range of cylindrical bottom surface to end face of Medium frequency induction coil formation; The width of thermal insulation layer is more than or equal to width of heating, and the width of thermal insulation layer is that lagging material is wrapped in cylindrical bottom surface that pipeline the is formed vertical range to end face.
During concrete enforcement, require that intermediate frequency power supply has automatic temperature control function, out-put supply frequency is 400Hz-5000Hz; The length of thermopair is KL, KL >=1/2L+30cm; Thermal insulation layer is wrapped in centered by weld seam to be needed around heat treated pipe welding seam, and the width of thermal insulation layer is BL, BL >=width of heating+20cm, and the thickness of thermal insulation layer is 2cm-10cm; Metallic conductor becomes spring-like outward centered by weld seam outside the thermal insulation layer of the heat treated pipeline of needs; The hot junction of thermopair is fixed on the temperature sampling point of weld seam by the mode that spot welding or iron wire are tied up, the trend of thermopair is parallel and vertical with Medium frequency induction coil with the heat treated pipeline of need, thermopair adopts K type thermocouple, material is nickel chromium triangle nisiloy or nickel chromium triangle nickel aluminium, and model selects WRN or WRNK; Thermal insulation layer adopts glass tape or iron wire binding, when adopting iron wire binding, iron wire and ruhmkorff coil need be carried out heat insulation with insulation.
Device of the present utility model in the specific implementation, can comprise the following steps:
(i) measure and need heat treated pipeline specifications, comprise outside diameter d and wall thickness δ (infinite in length system), wherein the unit of outside diameter d is cm, and the unit of wall thickness δ is cm;
(ii) intermediate frequency power supply power is selected: the power>=P requiring intermediate frequency power supply, wherein, P=(d ÷ δ)
1/2× d × δ ÷ 17, unit is KW;
(iii) the width of heating of needs is calculated: L × 70%≤width of heating≤L × 140%, wherein, L=(d ÷ δ)
1/2× 4.5+ δ × 5.3, unit is that cm (needs heat treated pipeline if high alloy P91, P92 type can take plus deviation, need heat treated pipeline if low-alloy 12Cr1MoV, 10CrMo910,15CrMo type can take negative deviation, need heat treated pipeline if high low-alloy dissimilar steel connects can take zero deflection calculated value), width of heating is the vertical range of cylindrical bottom surface to end face of Medium frequency induction coil formation;
(iv) stationary heat galvanic couple: the hot junction of thermopair is fixed on the temperature sampling point of pipe welding seam, contact must be good;
(v) thermal insulation layer is laid: be wrapped in by lagging material around pipe welding seam, and ensure that the cold junction of thermopair goes out to expose thermal insulation layer, the width of thermal insulation layer is more than or equal to described width of heating, and the width of thermal insulation layer is that lagging material is wrapped in cylindrical bottom surface that pipeline the is formed vertical range to end face;
(vi) Medium frequency induction coil is installed: Medium frequency induction coil metallic conductor being formed outside thermal insulation layer spring-like, width of heating is the width of heating that (iii) described step limits, metallic conductor is determined around the cross-sectional area of the number of turn outside thermal insulation layer and metallic conductor according to the intermediate frequency power supply selected, the number of turn need supporting with intermediate frequency power supply (intermediate frequency power supply of selection has the number of turn of Frequency Induction Heating coil and induction heater electrical conductor to adopt the explanation of cross section in illustrating, the quality of coil and technological standard must meet the requirement of intermediate frequency power supply and medium frequency induction heater),
(vii) Medium frequency induction coil is connected with intermediate frequency power supply, and exact connect ion compensation lead of thermocouple, startup optimization intermediate frequency power supply is heat-treated, and whole thermal treatment terminates rear shutoff intermediate frequency power supply.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (10)
1. a pipeline welding thermal treatment intermediate frequency induction heating device, it is characterized in that: comprise Medium frequency induction coil, intermediate frequency power supply, thermal insulation layer and thermopair, described thermal insulation layer is wrapped in be needed around heat treated pipe welding seam, the hot junction of described thermopair is fixed on to be needed on the temperature sampling point of heat treated pipe welding seam, cold junction is positioned at outside thermal insulation layer, described Medium frequency induction coil is by metallic conductor around needing to become spring-like outside outside the described thermal insulation layer of heat treated pipeline, and described Medium frequency induction coil is connected with intermediate frequency power supply.
2. pipeline welding thermal treatment intermediate frequency induction heating device as claimed in claim 1, is characterized in that: the power>=P of described intermediate frequency power supply, wherein, and P=(d ÷ δ)
1/2× d × δ ÷ 17, unit is KW, d is the outside diameter d needing heat treated pipeline, and unit is cm, δ is the wall thickness needing heat treated pipeline, and unit is cm;
Described metallic conductor around the width of heating of the Medium frequency induction coil needing heat treated pipeline to be formed outward is: L × 70%≤width of heating≤L × 140%, wherein, and L=(d ÷ δ)
1/2× 4.5+ δ × 5.3, unit is cm, and described width of heating is the vertical range of cylindrical bottom surface to end face of Medium frequency induction coil formation;
The width of described thermal insulation layer is more than or equal to described width of heating, and the width of described thermal insulation layer is that lagging material is wrapped in cylindrical bottom surface that pipeline the is formed vertical range to end face.
3. pipeline welding thermal treatment intermediate frequency induction heating device as claimed in claim 2, it is characterized in that: described intermediate frequency power supply has automatic temperature control function, out-put supply frequency is 400Hz-5000Hz.
4. pipeline welding thermal treatment intermediate frequency induction heating device as claimed in claim 2, is characterized in that: the length of described thermopair is KL, KL >=1/2L+30cm.
5. pipeline welding thermal treatment intermediate frequency induction heating device as claimed in claim 2, it is characterized in that: described thermal insulation layer is wrapped in around the heat treated pipe welding seam of needs centered by weld seam, the width of described thermal insulation layer is BL, BL >=width of heating+20cm.
6. pipeline welding thermal treatment intermediate frequency induction heating device as claimed in claim 5, is characterized in that: the thickness of described thermal insulation layer is 2cm-10cm.
7. pipeline welding thermal treatment intermediate frequency induction heating device as claimed in claim 1 or 2, is characterized in that: described metallic conductor becomes spring-like outward centered by weld seam outside the thermal insulation layer of the heat treated pipeline of needs.
8. pipeline welding thermal treatment intermediate frequency induction heating device as claimed in claim 1 or 2, it is characterized in that: the hot junction of described thermopair is fixed on the temperature sampling point of weld seam by the mode that spot welding or iron wire are tied up, the trend of described thermopair is parallel and vertical with Medium frequency induction coil with the heat treated pipeline of need.
9. pipeline welding thermal treatment intermediate frequency induction heating device as claimed in claim 8, is characterized in that: described thermopair adopts K type thermocouple, and material is nickel chromium triangle nisiloy or nickel chromium triangle nickel aluminium, and model selects WRN or WRNK.
10. pipeline welding thermal treatment intermediate frequency induction heating device as claimed in claim 1 or 2, is characterized in that: described thermal insulation layer adopts glass tape or iron wire binding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520135732.1U CN204529914U (en) | 2015-03-10 | 2015-03-10 | A kind of pipeline welding thermal treatment intermediate frequency induction heating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520135732.1U CN204529914U (en) | 2015-03-10 | 2015-03-10 | A kind of pipeline welding thermal treatment intermediate frequency induction heating device |
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| CN204529914U true CN204529914U (en) | 2015-08-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104694716A (en) * | 2015-03-10 | 2015-06-10 | 扬中市盛达电器制造有限责任公司 | Pipeline welding heat treatment intermediate frequency induction heating technology and device |
| CN106884086A (en) * | 2017-02-17 | 2017-06-23 | 燕山大学 | The device and technique of a kind of bilateral flame heating removal submerged arc pipe weld residual stress |
| CN109613052A (en) * | 2018-11-12 | 2019-04-12 | 南京航空航天大学 | A kind of hot loading device of structural test |
| CN109971940A (en) * | 2019-04-26 | 2019-07-05 | 燕山大学 | A kind of device and method of discrete type coil heats straight seam welded pipe |
-
2015
- 2015-03-10 CN CN201520135732.1U patent/CN204529914U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104694716A (en) * | 2015-03-10 | 2015-06-10 | 扬中市盛达电器制造有限责任公司 | Pipeline welding heat treatment intermediate frequency induction heating technology and device |
| CN106884086A (en) * | 2017-02-17 | 2017-06-23 | 燕山大学 | The device and technique of a kind of bilateral flame heating removal submerged arc pipe weld residual stress |
| CN106884086B (en) * | 2017-02-17 | 2018-04-03 | 燕山大学 | A kind of bilateral flame heating removes the device and technique of submerged arc pipe weld residual stress |
| CN109613052A (en) * | 2018-11-12 | 2019-04-12 | 南京航空航天大学 | A kind of hot loading device of structural test |
| CN109613052B (en) * | 2018-11-12 | 2022-02-08 | 南京航空航天大学 | Heat loading device for structural test |
| CN109971940A (en) * | 2019-04-26 | 2019-07-05 | 燕山大学 | A kind of device and method of discrete type coil heats straight seam welded pipe |
| CN109971940B (en) * | 2019-04-26 | 2020-04-28 | 燕山大学 | Device and method for heating straight welded pipe by discrete coil |
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Granted publication date: 20150805 Effective date of abandoning: 20170329 |
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| AV01 | Patent right actively abandoned |