CN101059191A - Device for preparing pipeline - Google Patents

Device for preparing pipeline Download PDF

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Publication number
CN101059191A
CN101059191A CNA2006101080507A CN200610108050A CN101059191A CN 101059191 A CN101059191 A CN 101059191A CN A2006101080507 A CNA2006101080507 A CN A2006101080507A CN 200610108050 A CN200610108050 A CN 200610108050A CN 101059191 A CN101059191 A CN 101059191A
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CN
China
Prior art keywords
pipeline
temperature
control unit
current
energy supply
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Granted
Application number
CNA2006101080507A
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Chinese (zh)
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CN101059191B (en
Inventor
麦柯尔·赫斯基
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HESKEY MCCALL GmbH
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HESKEY MCCALL GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
    • F16L53/30—Heating of pipes or pipe systems
    • F16L53/35—Ohmic-resistance heating
    • F16L53/38—Ohmic-resistance heating using elongate electric heating elements, e.g. wires or ribbons

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Resistance Heating (AREA)
  • Pipe Accessories (AREA)

Abstract

An arrangement used to prepare the conduit wiring (6), the conduit wiring includes the conductor section (61, 62, 63, 64) which is electricity-insulated and heat-insulated, and is heated for a short time or continuously with special heater (1). The special heater (1) includes an energy-supplying connecting part (14), a temperature sensing part (13), a control unit (12) and a heating current emitting part (19). The control unit (12) is provided with a heating current regulator, to heat up the conduit wiring (6) to the proper temperature.

Description

Be used to prepare the device of pipeline
Technical field
The present invention relates to a kind of device that is used to prepare the pipeline (Rohrleitung) of the conductor segment (Leiterabschnitte) that comprises that electricity and heat are isolated.
Background technique
When laying heating system pipeline (Fernheizungsrohrleitung), these pipelines are accepted ambient temperature, make corresponding line sections (Rohrleitungsabschnitt) have definite " cold length (Kaltlaenge) ".When the work of heating system pipeline, temperature occurs and raise, and cause elongated (Laengung) (" hot length (Warmlaenge) ") of line sections thus.For fear of the mechanical overload stress (Ueberlastspannung) that causes owing to this thermal expansion, compensating part is installed in pipeline journey (Rohrleitungsstreck), U type arc (U-Boegen) for example, this be the cost costliness and often also cause current loss in the circuit.
Summary of the invention
Task of the present invention is, a kind of device that is used to prepare the pipeline of the conductor segment that comprises that electricity and heat are isolated is provided, and makes and can avoid above-mentioned shortcoming.
According to the present invention, the device that is used to prepare pipeline comprises electric heater, and line sections can be heated by it.Thus, in the laying of pipeline, can " expand in advance " also thus by heating pipe, make after laying, but before starting working, promptly after cooling, pipeline is owing to shrinking the tensile stress that suffers machinery, and wherein mechanical tensile stress is under the employed material of pipeline, the most situation under the Yield Of Steel.In pipeline is started working, pipeline walls higher temperature when reaching than pre-expansion heating, thus, the tensile stress of machinery is eliminated, and great majority also form compressive stress in pipeline.But, compressive stress little than in not have the pre-situation about heating that expands.
In order to carry the liquid of thickness, advantageously, improve the temperature of liquid, to reduce flow resistance.By preparing pipeline with device according to the present invention to accept higher temperature, when carrying thick liquid, flow resistance is lowered.
At length, electric heater according to the present invention has energy supply attachment portion, temperature sensing part, control unit and heating current and sends part.Control unit carries out temperature-actual value-rating value relatively, sends controlled electric heating electric current to send part based on the temperature of sampling with the temperature rating control heating current that is transfused in pipeline.
According to a kind of improvement project of the present invention, energy supply attachment portion comprises transformer and rectification circuit, and can controlled by control unit aspect the power input.The resistive (resistive) that is used to line sections by direct current heats, and has avoided around the magnetic scattering field that is heated conductor segment.This may be important for the pipeline in being placed the zone.Use galvanic another advantage to be, a plurality of heaters can be side by side, perhaps be connected in parallel to each other or connect with being one another in series, and needn't carry out each heater costliness synchronously.
Except temperature transducer, electric heater also has supervisory circuit, and it is configured to the different piece of heater or to the electrical interconnection of waiting to be heated pipeline.Under situation about breaking down, protective circuit works, and according to the fault effects heater.
Description of drawings
By accompanying drawing the present invention is described.Wherein:
Fig. 1 schematically shows the device that is used to prepare pipeline, and
Fig. 2 shows first embodiment according to electric heater of the present invention, and
Fig. 3 shows second embodiment.
Embodiment
Fig. 1 shows the essential structure of the device that is used to prepare pipeline.Dispose electric heater 1, it links to each other with energy supply source 2, for example electrical network by electric current connection cable 3, and electric heater links to each other with media pipeline 6 by heating current circuit 4,5 in its that side.In an illustrated embodiment, pipeline 6 is divided into single conductor segment 61,62,63,64, and wherein the section 61 and 63 that is connected with 5 thereon of heating current circuit 4 is connected with each other by bridge circuit 7, to form current loops with conductor segment 4,61,7,63 and 5.
Media pipeline 6 generally includes steel pipe as structure member, and the shell that is made of the isolated material that not only electricity is isolated but also heat is isolated.Sense line 8 extends within isolated part, and temperature transducer 9 is connected to sense line 8.Heater 1 has sense line 10, and it is connected with sense line 8 by electric coupling 11, and also is connected with temperature transducer 9 thus.
Fig. 2 shows the more detailed details of electric heater.The core of heater is a control unit 12, and it is connected with each environment division of heater.Temperature sensing part 13 is wherein arranged, and the temperature transducer 9 among Fig. 1 can also have energy supply attachment portion 14 in addition corresponding to it, and it can comprise power source preprocessing circuit 15, transformer 16 and rectification circuit 17 and eliminator 18.Heating current sends part 19 and is connected on the eliminator 18, and comprises heating current circuit 4,5 and 7.Trouble report part 20 comprises a series of trouble report sensors, and they are configured the adventurous part to equipment, and particularly report and the disconnection that is connected of temperature transducer 9, short circuit and the superheat temperature between the heating current circuit 4,5.For this reason, control unit 12 activates protective circuit 21, and it is used to turn-off heater.
Control unit 12 comprises input keyboard, wherein is used for temperature rating.Control unit 12 comprises regulator in addition, and it carries out the temperature actual value of sensor 9 and the comparison between the temperature rating, and correspondingly controls the heating current on the heating current circuit 4,5.
Power source preprocessing circuit 15 is used for the characteristics coupling with heater and energy supply section, and for example can comprise harmonic filter.Transformer 16 is used for the electric current of energy supply source 2 and magnitude of voltage are converted to the lower voltage and the electric current of rising.Rectification circuit 17 comprises controlled thyristor, is used to regulate the power input.Yet the power input can certainly be regulated by the transformer 16 of respective configuration.Eliminator 18 is used to make the electric current by rectification level and smooth.Make every effort to after leaving eliminator 18, reach 2% the sine residue ripple that is lower than electric current.Heating current after level and smooth is fed to heating current and sends part 19.
Fig. 3 shows second embodiment according to electric heater of the present invention.Represent with identical reference character with the parts of first embodiment's unanimity, and with reference to relative description.The display unit 24 and the internal current monitoring 25 of current measurement 22, power-measuring device 23, electric current and voltage are arranged in addition.Send integrated overvoltage protection in the part 19 at heating current.
Control unit 12 comprises the PID regulator 30 as major component, is connected with PD regulator 31 thereafter.The PID regulator comprises the parallel circuit of PD regulator and I regulator, and earlier detection failure, adjust to regulate deviation and get rid of remaining adjusting deviation apace.On the one hand by rationality monitoring (Plausibilitaetsueberwachung) and input circlult 32 to the measured temperature of PID regulator 30 conveyings as actual value, on the other hand by rating value storage and display circuit 33 to PID regulator 30 delivery temperature rating value.Another input circlult 34 internally current monitoring 25, from rationality supervisory circuit 35 and monitoring temperature circuit 36 received signals internally, these input signals are assessed or weighting, and output signal is transmitted to another rationality supervisory circuit 37, this monitoring circuit is connected to storage 38 with its second output terminal, is used for the maximum current rating value.PD regulator 31 is connected on the PID regulator 30 at input side, be connected in addition on current measurement 22 and the rationality supervisory circuit 37, and with its output signal control rectification circuit 17, make in eliminator 18, make electric current level and smooth after, send the electric current that output has correct voltage and current intensity in the part 19 at heating current.
Temperature sensing part 13 comprises first temperature transducer 41, second temperature transducer 42 and the three-temperature sensor 43.These temperature transducers can be corresponding to the display unit on the control unit 12.The quantity of temperature transducer is estimated as just example, and depends on how many temperature transducers are present on heated conductor segment 61 and 63 and should be analyzed.Rationality and input circlult 32 for example come these values are weighted by measured temperature being carried out suitable mean value calculation.
Electric heater 1 is applicable to the pipeline 6 that comprises electricity and hot insulated conductor section of resistive ground heating any kind.Usually, center tube is made of metal, and it conducts electricity naturally.When heating line is integrated or add in the center tube, also can heat nonconducting center tube.

Claims (11)

1. be used to prepare the device of pipeline (6), wherein said pipeline comprises the conductor segment (61,62,63,64) that electricity and heat are isolated,
It is characterized in that,
Electric heater (1) has energy supply attachment portion (14), temperature sensing part (13), control unit (12) and heating current and sends part (19), wherein said control unit (12) carries out temperature-actual value-rating value relatively, so that control the heating current that is sent based on temperature of sampling and the temperature rating that is transfused in pipeline.
2. according to the device of claim 1,
It is characterized in that, described control unit (12) comprises PID regulator (30), described PID regulator (30) is connected to described temperature sensing part (13) and rating value storage (33) at input side, and is connected with described energy supply attachment portion (14) at outlet side.
3. according to the device of claim 2,
It is characterized in that described control unit (12) comprises PD regulator (31), described PD regulator (31) is connected to described PID regulator (30) and supervisory circuit (22 at input side, 25,36,38), and at outlet side directly be connected with described energy supply attachment portion (14).
4. according to the device of claim 3,
It is characterized in that described supervisory circuit (22,25,36,38) comprises power checker (22) and/or internal current monitoring (25) and/or inside temperature monitoring (36) and/or maximum current rating value monitoring (38).
5. according to the device of one of claim 1 to 4,
It is characterized in that described energy supply attachment portion (14) comprises transformer (16) and rectification circuit (17), and can be controlled by described control unit (12) aspect the power input.
6. according to the device of claim 5,
It is characterized in that, level and smooth in order to make heating current, send between the part (19) at rectification circuit (17) and heating current and to connect eliminator (18).
7. according to the device of one of claim 1 to 6,
It is characterized in that; fault sensor (20) is assigned to described energy supply attachment portion (14) and/or temperature sensing part (13) and/or heating current and sends part (19); wherein said fault sensor links to each other with described control unit (12), with the protective circuit (21) that activates described heater (1).
8. according to the device of one of claim 1 to 7,
It is characterized in that described energy supply attachment portion (14) comprises pre-process circuit (15).
9. be used to prepare the method for pipeline (6), wherein said pipeline comprises the conductor segment (61,62,63,64) that electricity and heat are isolated,
Said method comprising the steps of:
A) when pipeline installation (6), described line sections (61,62,63,64) is heated to first predetermined temperature, is used for the pre-expansion of described line sections;
B) described pipeline (6) is cooled, and wherein said line sections (61,62,63,64) stands mechanical tensile stress owing to shrinking;
C) described pipeline (6) is started working, and wherein is placed in second predetermined temperature;
It is characterized in that,
At step a) or c) in, with the described line sections of direct current electric heating (61,62,63,64).
10. according to the method for claim 9, it is characterized in that the direct current after use is level and smooth is used for heating.
11. the method according to claim 9 or 10 is characterized in that, uses a plurality of heaters (1) according to one of claim 1 to 8, is used for the described line sections of electric heating (61,62,63,64) simultaneously.
CN2006101080507A 2006-04-18 2006-07-26 Device for preparing pipeline Expired - Fee Related CN101059191B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202006006307U DE202006006307U1 (en) 2006-04-18 2006-04-18 Arrangement for the preparation of pipelines
DE202006006307.2 2006-04-18

Publications (2)

Publication Number Publication Date
CN101059191A true CN101059191A (en) 2007-10-24
CN101059191B CN101059191B (en) 2010-05-12

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ID=38460647

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Application Number Title Priority Date Filing Date
CN2006101080507A Expired - Fee Related CN101059191B (en) 2006-04-18 2006-07-26 Device for preparing pipeline

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CN (1) CN101059191B (en)
DE (1) DE202006006307U1 (en)
HK (1) HK1114656A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101975324B (en) * 2009-12-30 2012-05-09 北京豪特耐管道设备有限公司 Method for electric preheating construction of directly-buried pipeline
CN103615624A (en) * 2013-11-30 2014-03-05 中国科学院电工研究所 Fused salt pipeline heating device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010012446U1 (en) * 2010-09-10 2011-12-12 Voss Automotive Gmbh Heatable media line and system for their operation
IT202100006401A1 (en) 2021-03-17 2022-09-17 Dhplanet S R L SYSTEM AND METHOD OF LAYING PIPE

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603886A1 (en) * 1986-02-07 1987-08-20 Msr Ges Fuer Mess Steuerungs U Heat exchanger for heating flowing gases or liquids
US5862303A (en) * 1996-05-17 1999-01-19 Advanced Metal Technologies, Ltd. Electrically heated pipe with helically wound amorphous alloy heater
US6564011B1 (en) * 2000-08-23 2003-05-13 Fmc Technologies, Inc. Self-regulating heat source for subsea equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101975324B (en) * 2009-12-30 2012-05-09 北京豪特耐管道设备有限公司 Method for electric preheating construction of directly-buried pipeline
CN103615624A (en) * 2013-11-30 2014-03-05 中国科学院电工研究所 Fused salt pipeline heating device

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Publication number Publication date
CN101059191B (en) 2010-05-12
DE202006006307U1 (en) 2007-08-30
HK1114656A1 (en) 2008-11-07

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