CN1125475A - A district heating pipe stretch and a method of establishing such a stretch - Google Patents
A district heating pipe stretch and a method of establishing such a stretch Download PDFInfo
- Publication number
- CN1125475A CN1125475A CN 94192451 CN94192451A CN1125475A CN 1125475 A CN1125475 A CN 1125475A CN 94192451 CN94192451 CN 94192451 CN 94192451 A CN94192451 A CN 94192451A CN 1125475 A CN1125475 A CN 1125475A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- pipe fitting
- pipeline
- outer sleeve
- sleeve part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
- F16L59/18—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for joints
- F16L59/20—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for joints for non-disconnectable joints
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
- Joints Allowing Movement (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
Conventionally designed district heating pipes assembled from prefabricated heat insulated pipe elements (2, 4) are not well suited for being mounted in the underground by the so-called horizontal drilling technique, because the associated exterior sealing sleeves (16) arranged over the pipe element joints may be axially displaced if they meet with obstructions during their insertion through the subsoil bore. According to the invention, the conventional joints may still be used, if only the said sleeves, with reduced diameter, are mounted between narrowed ends (12) of the exterior mantle pipes (10) of the pipe elements (2, 4).
Description
The present invention relates to a kind of underground local heating (or claiming district heating) pipeline.Most of local heating pipes are installed in the trench that excavates, but the horizontal drilling technology of using a kind of what is called to control in the area of burying cable and pipeline underground more and more, pipeline is pushed or introduces a hole of passing subsoil by this technology, be full of this hole widely, make for example depression can not occur on the surface of heavy area above the location in laying hole.
It is desirable that smooth local heating pipe is installed by this way, but the pipeline of traditional mode of production can not be applicable to a kind of like this installation satisfactorily, because they are to make with the prefabricated pipe that connects into certain-length, and be provided with the stuffing box gland pipe fitting that centers in the joint, the main purpose of sleeve part is to form a kind of sealing completely, preventing that water part from immersing insulating material, sleeve part is installed between inner conduit and the plastic outer sleeve that centers on.Sleeve part be installed in each joint outer sleeve interface end around, they make the plastic board reel or the bolt sheet metal shell together of crimping sleeve part or welding usually.When making with traditional approach, sleeve part is not suitable for resisting mechanical axis to displacement force, and sleeve part can run into when this power was buried underground in the narrowed aperture, when burying underground even wish that with quite high insertion speed pipe laying, this may impact sleeve part.
But, according to the present invention, have been found that, in fact can adhere to comprising traditional interconnection technique of traditional sleeve part and reach highly satisfied purpose, just can adopt shape to have the outer sleeve of the end that attenuates this moment, then can add a kind of like this sleeve part of reduced, make them in no case can radially exceed the outer surface of outer sleeve.And, if the end of sleeve part near the shoulder that radially attenuates on the outer sleeve, so can be vertically securely mechanical ground anchor live sleeve part.
Illustrate in greater detail the present invention with reference to the accompanying drawings, wherein:
Fig. 1 is the longitdinal cross-section diagram according to pipe joint of the present invention;
Fig. 2 is another kind of embodiment's a corresponding views.
Two local heating pipe fittings 2 shown in Fig. 1 and 4, they comprise an inner conduit 6, a kind of insulating material 8 and an outer sleeve 10 around it in the mode of routine.The end of conduit 6 combines with suitable manner from stretching out around part 8 and 10 end, for example by welding, if perhaps can adopt by certain other method faster.
As the preparation of (connection) pipe 6, be preferably in the outside 12 that has prepared narrow down (carefully) during production phase of pipe in the end of outer sleeve, for example, contractibility 14 of welding on each tube end wherein.After connecting pipe 6, can finish connection work in a kind of traditional basically mode, just, between tube end 12 and around tube end 12, a sleeve part 16 is installed, fill up the free space of sleeve part inside subsequently with foamed plastics, perhaps a kind of insulating material is installed, subsequently the installation sleeve pipe fitting around the free end of pipe 6.When using the crimping sleeve part, this pipe fitting should be at the very start on the outside even as big as the thicker major component that is installed in one of pipe 2 or 4 with " ready position ", shown in the top sides of Fig. 1.In principle, the end 12 of contractibility 14 can be long enough to sleeve part is remained on ready position, and does not need the sleeve part must be thicker than outer sleeve 10, but has the remarkable lengthening of length of the pipe that attenuates of the athermic effect that reduces accordingly this moment.
Be to be understood that, the pipe joint of Chan Shenging will show following advantage like this, promptly no matter its traditional design and installation, the outside of sleeve part 16 can not reach outside the outside of outer sleeve 10, make the pipe of two connections after this when inserting, can not produce any significant axially influence by a throat, therefore, favourable way is, the length of the end that attenuates 12 of outer sleeve is small enough to hold sleeve part 16, to such an extent as to the sleeve part that is in the mounting point thereafter between relative pipe shoulder the root place of taper portion 12 stable vertically.The way that can select is that sleeve part can be a kind of thin plate sleeve part that has at the semi-cylindrical shaped shell of male flange place combination.At this moment, male flange is given prominence to outside the outer sleeve periphery and can be allowed.
Have been found that if sleeve part 16 is made in complete traditional mode, in any case can there be some problems relevant under specific circumstances with the insertion of pipe.But, as shown in Figure 2, by increasing an outer cover sleeve part 18, this type of problem can very overcome effectively and not change the conventional feature of sleeve part, this outer cover sleeve part 18 can be a crimping sleeve part, it stretches out in outside the end of stuffing box gland pipe fitting 16, and itself can be adhesive on the outer sleeve end or at the root place of the pipe end 12 that attenuates to be stablized vertically near the pipe shoulder.Obtain a kind of mechanical masking of very effective stuffing box gland pipe fitting thus, even its displacement a bit, this efficient for inner sleeve spare 16 does not play decisive work yet to be had.It in addition can allow the outsides of outer cover sleeve part 18 itself to be positioned at the outside of outer sleeve periphery slightly.
Claims (5)
1. local heating pipeline, it is made up of the prefabricated pipe fitting that connects and preferably is installed in underground by being inserted in the underground passage that is drilled to, above-mentioned pipe fitting is centered on by the connecting sleeve pipe fitting in the joint, sleeve part is the gap between the adjacent end portion of the outer sleeve of bridge joint pipe fitting hermetically, it is characterized in that, the connecting sleeve pipe fitting that centers on is installed on the outer sleeve end that attenuates in such a way, make they the outside they flush with the outer periphery of outer sleeve or be positioned within the outer periphery of outer sleeve.
2. the pipeline according to claim 1 wherein, is installed an outer cover sleeve part on the connecting sleeve pipe fitting, it is characterized in that the outer cover sleeve part immerses oneself in to settle with respect to the periphery of outer sleeve at least in part.
3. pipeline according to claim 1, wherein, the connecting sleeve pipe fitting in its end near the shoulder that attenuates of outer sleeve.
4. the pipe fitting that confession is used according to the pipeline of claim 1 is characterized in that, its outer sleeve has the end that attenuates.
5. a foundation is characterized in that according to the method for the pipeline of claim 1, after the pipeline prepackage is finished, pipeline is installed in underground by the insertion according to the horizontal drilling principle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK0707/93 | 1993-06-15 | ||
| DK70793A DK170383B1 (en) | 1993-06-15 | 1993-06-15 | District heating pipe stretching and method of establishing it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1125475A true CN1125475A (en) | 1996-06-26 |
Family
ID=8096613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94192451 Pending CN1125475A (en) | 1993-06-15 | 1994-06-15 | A district heating pipe stretch and a method of establishing such a stretch |
Country Status (9)
| Country | Link |
|---|---|
| CN (1) | CN1125475A (en) |
| AU (1) | AU6994994A (en) |
| DE (1) | DE4493874T1 (en) |
| DK (1) | DK170383B1 (en) |
| FI (1) | FI955951A0 (en) |
| GB (1) | GB2294742A (en) |
| PL (1) | PL312037A1 (en) |
| SE (1) | SE504171C2 (en) |
| WO (1) | WO1994029635A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9613973D0 (en) * | 1996-07-03 | 1996-09-04 | Bredero Price Services | Improvements in or relating to field joints |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2901301A1 (en) * | 1979-01-15 | 1980-07-24 | Kabel Metallwerke Ghh | Heat insulated pipe joint - using sleeves inside and outside of outer plastic tube as mould for plastic foam filling |
| DE3736812C1 (en) * | 1987-10-30 | 1989-01-12 | Reinhard Tweer Gmbh | Cast junction for connecting tubes in steel construction work |
| DE3831623A1 (en) * | 1988-09-17 | 1990-03-22 | Dillinger Stahlbau | METHOD FOR CONNECTING REMOTE HEATING PIPES |
-
1993
- 1993-06-15 DK DK70793A patent/DK170383B1/en active
-
1994
- 1994-06-15 GB GB9524789A patent/GB2294742A/en not_active Withdrawn
- 1994-06-15 DE DE4493874T patent/DE4493874T1/en not_active Withdrawn
- 1994-06-15 WO PCT/DK1994/000236 patent/WO1994029635A1/en active Application Filing
- 1994-06-15 CN CN 94192451 patent/CN1125475A/en active Pending
- 1994-06-15 PL PL31203794A patent/PL312037A1/en unknown
- 1994-06-15 AU AU69949/94A patent/AU6994994A/en not_active Abandoned
-
1995
- 1995-12-12 SE SE9504445A patent/SE504171C2/en not_active IP Right Cessation
- 1995-12-12 FI FI955951A patent/FI955951A0/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| DE4493874T1 (en) | 1996-06-27 |
| SE9504445L (en) | 1995-12-12 |
| SE9504445D0 (en) | 1995-12-12 |
| PL312037A1 (en) | 1996-04-01 |
| FI955951A (en) | 1995-12-12 |
| SE504171C2 (en) | 1996-11-25 |
| WO1994029635A1 (en) | 1994-12-22 |
| GB9524789D0 (en) | 1996-02-21 |
| AU6994994A (en) | 1995-01-03 |
| DK170383B1 (en) | 1995-08-14 |
| GB2294742A (en) | 1996-05-08 |
| FI955951A0 (en) | 1995-12-12 |
| DK70793A (en) | 1994-12-16 |
| DK70793D0 (en) | 1993-06-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |