CN109058635A - Prefabricated thermal insulation bilayer bend pipe and preparation method thereof - Google Patents
Prefabricated thermal insulation bilayer bend pipe and preparation method thereof Download PDFInfo
- Publication number
- CN109058635A CN109058635A CN201810965223.XA CN201810965223A CN109058635A CN 109058635 A CN109058635 A CN 109058635A CN 201810965223 A CN201810965223 A CN 201810965223A CN 109058635 A CN109058635 A CN 109058635A
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- core pipe
- pipe
- casing
- bend
- thermal insulation
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- 238000009413 insulation Methods 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title abstract description 3
- 239000010410 layer Substances 0.000 claims abstract description 18
- 238000003466 welding Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000011241 protective layer Substances 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 238000004321 preservation Methods 0.000 claims abstract description 4
- 230000010354 integration Effects 0.000 claims description 4
- 239000011162 core material Substances 0.000 claims description 2
- 230000008646 thermal stress Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000004513 sizing Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000035882 stress Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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
- F16L43/00—Bends; Siphons
-
- 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
- F16L59/22—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for bends
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
Prefabricated thermal insulation bilayer bend pipe and preparation method thereof belongs to urban heating direct-buried hot water pipeline field of engineering technology, the series of products of the heating direct-buried hot water pipeline bilayer bend pipe sizing chemical conversion plant produced of 85 ~ 125 degree in Heat Supply Engineering.The prefabricated thermal insulation bilayer bend pipe includes core pipe, casing, connecting plate, annular plug, insulating layer, protective layer; core pipe is welded under normality or pre- Warm status with connecting plate; core pipe and connecting plate pass through annular plug and casing welding under normality or pre- Warm status; casing peripheral hardware one layer of heat preservation layer, an insulating layer peripheral hardware protective layer.The present invention makes the uncompensated laying of direct-burried heating network realization truly, solves the problems, such as that it is inadequate to be difficult to the common compensation bend pipe intensity met when long straight-arm thermal stress acts on for common elbow in current heating direct-burying pipeline engineering.
Description
Technical field
The invention belongs to urban heating direct-buried hot water pipeline field of engineering technology, and in particular to be prefabricated in the factory heat-preservation double-layer
Bend pipe.
Background technique
With the development of society, directly buried installation is widely used in central heating pipe.Heat supply that direct-burried is uncompensated
When the compensation straight-arm of compensation of pipeline bend pipe is very long, compensation bend pipe needs to bear biggish bending stress effect, so that beyond mending
Repay the condition of bend pipe stress checking calculation.Thus in practical projects, often increase compensator and anchor block etc. to carry out compensation bend pipe
Protection, thus it is difficult to realize the uncompensated laying of direct-burried for not needing artificially to be arranged compensator truly, both increase into
This, also reduces the reliability of heating direct-buried pipe network.
The processing method that bend pipe is protected in engineering at present there are several types of:
1) method of bend pipe radius of curvature is increased；
2) two compensators are set in the certain distance of bend pipe two sides；
3) anchor block and compensator is respectively set in the certain distance of bend pipe two sides；
4) two anchor blocks are set in the certain distance of bend pipe two sides.
In conclusion enough construction spaces are needed using the method for increasing bend pipe radius of curvature,
Usual construction site is unable to satisfy the arrangement of long-sweep ell, can occupy the position of other pipelines, influence other phases
The arrangement of adjacent pipeline；The method protected using anchor block or compensator, increases anchor block or compensator checks cell, not only increases
Add project cost, extend the probability that construction period also increases compensator leak, reduces the safety of pipe network.And it occupies centainly
The underground space, difficulty of construction is big, or even does not have execution conditions.
Summary of the invention
It is difficult to meet when the long straight pipeline thermal stress in two sides acts on to solve common elbow in heating direct-burying pipeline engineering
The connection of corner pipeline, the present invention resists crooked deformability deficiency according to existing bend pipe, and provides fatigue life length, operation more
A kind of safe and reliable high-intensitive bend pipe product, a kind of factory's sizing production the double-deck bend pipe product --- prefabricated thermal insulation bilayer is curved
Pipe.
Technical solution of the present invention: prefabricated thermal insulation bilayer bend pipe, the company for heating direct-burying pipeline engineering transfer cornue road
It connects；The prefabricated thermal insulation bilayer bend pipe completes in factory；The prefabricated thermal insulation bilayer bend pipe includes core pipe, casing, connection
Plate, annular closure plate, insulating layer, protective layer, core pipe are welded under normality or pre- Warm status with connecting plate, and core pipe and connecting plate are normal
Pass through annular plug and casing welding, casing peripheral hardware one layer of heat preservation layer, an insulating layer peripheral hardware protective layer under state or pre- Warm status.
The process for making of prefabricated thermal insulation bilayer bend pipe is that production core pipe, core pipe can be core pipe elbow and core pipe first
Elbow straight tube arm welding, is also possible to integration and completes；Secondly under normality or pre- Warm status, by no less than 2 pieces
Connecting plate be uniformly welded on core tube wall, annular closure plate and core pipe, connecting plate are welded；Then casing is made, casing can be with
It is casing elbow and casing elbow straight tube arm welding, is also possible to integration and completes；Casing is installed；Finally, normal
Soldering sleeve and annular closure plate under state or pre- Warm status.
The core pipe is made of core pipe elbow and core pipe elbow straight tube arm.Core pipe elbow and core pipe elbow straight tube arm can be
Welding is separated, is also possible to integration and completes.
Core pipe angle of bend β is 85 ~ 125 degree, preferably 90 degree of core pipe angle of bend β；Core pipe elbow radius of curvature is not less than
1.5 times of pipeline nominal diameter.
Core pipe elbow straight tube arm lengths are not less than 1 times of core pipe nominal diameter, and are not less than 800mm.
Described sleeve pipe is formed by casing elbow and casing elbow straight tube arm welding.
Big 1 ~ the 5mm of described sleeve pipe wall ratio core pipe wall thickness.
The outer diameter of casing=core pipe outer diameter+2h+2s, h is the distance between internal surface of sleeve pipe and core tube wall, and h is not more than 25
Mm, s are casing wall thicknesses.
Casing is made of casing elbow and casing elbow straight tube arm.Casing elbow angle is identical as core pipe angle of bend；Set
Pipe bend radius of curvature is identical as core pipe elbow radius of curvature.Casing elbow straight tube arm lengths are shorter than core pipe elbow straight tube arm lengths
400mm。
The connecting plate of core pipe is no less than 2；There can be filler between core tube wall and internal surface of sleeve pipe, it can also be without filling
Object.
When the present invention solves common elbow in heating direct-burying pipeline engineering and is difficult to meet the long straight pipeline thermal stress effect in two sides
Corner pipeline connectivity problem, prefabricated thermal insulation bilayer bend pipe fatigue life is long, operation more secure and reliable.
Under identical caliber, for the present invention compared with general elbow, stress maximum value reduces 41.79% respectively,
43.60%, 47.22%.For bilayer bend pipe of the invention compared with thickening bend pipe, stress maximum value reduces 23.47%, 27.09% respectively,
29.36%.It can be seen that the stress maximum value of bend pipe can be effectively reduced in the present invention, and then the bearing capacity of bend pipe is improved, it is tired
The labor service life is long, operation is more safe and reliable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of prefabricated thermal insulation bilayer bend pipe in the embodiment of the present invention 1.
Fig. 2 is the structural schematic diagram of prefabricated thermal insulation bilayer bend pipe in the embodiment of the present invention 2.
In figure: 1 is core pipe elbow, and 2 be core pipe elbow straight tube arm, and 3 be casing elbow, and 4 be casing elbow straight tube arm, and 5 are
Connecting plate, 6 be annular plug, and 7 be insulating layer, and 8 be protective layer, 9, weld seam.
Specific embodiment
Embodiment 1: core pipe elbow 1 and core pipe elbow straight tube arm 2 constitute core pipe；Casing elbow 3 and casing elbow straight tube arm 4
Forming sleeves.
Shown in Fig. 1,1, the present embodiment core pipe elbow, core pipe elbow straight tube 2, arm, 4 pieces of connecting plate, casing elbow 1,
2, casing elbow straight tube arm, 2 pieces of annular plug.
The present embodiment manufacture craft: core pipe elbow 1 and core pipe elbow straight tube arm 2 first is welded into core pipe, core pipe elbow angle
Spending β is 90 degree；Secondly core pipe and connecting plate 5 weld under normality or pre- Warm status；Then annular plug 6 is worn in core pipe two sides,
Under normality or pre- Warm status, annular plug 6 is welded with core pipe 2, and annular plug 6 is welded with connecting plate 5；Next installation casing is curved
First 3 and casing elbow straight tube arm 4, casing elbow 3 and casing elbow straight tube arm 4 weld；Under normality or pre- Warm status, casing is curved
Head straight tube arm outer end and annular plug 6 weld；Last bushing outer surface increases insulating layer 7；7 outer surface of insulating layer increases protective layer
8。
In addition, if prefabricated thermal insulation bilayer bend pipe is longer, when being unable to satisfy the welding requirements of connecting plate and casing, casing elbow
Butt-welding elbow can be used, casing straight-arm can also use butt welding.
Embodiment 2: the present embodiment core pipe 1, casing 1,4 pieces of connecting plate, 2 pieces of annular plug.
The present embodiment manufacture craft: being made into one core pipe 9 first, core pipe angle of bend β are 85 degree；Secondly in normality or
The welding of 4 pieces of connecting plates 5 and core pipe 9 is completed under pre- Warm status；Then annular plug 6 is worn in 9 two sides of core pipe, in normality or preheating shape
Under state, annular plug 6 is welded with core pipe 2, and annular plug 6 is welded with connecting plate 5；Following being made into one casing 10, installation
Casing 10, under normality or pre- Warm status, casing 10 and annular plug 6 are welded.Last bushing outer surface increases insulating layer 7；It protects
Warm 7 outer surface of layer increases protective layer 8.
Embodiment 3: core pipe angle of bend β of the present invention is 100 degree, and other contents are same as Example 1.
Embodiment 4: core pipe angle of bend β of the present invention is 110 degree, and other contents are same as Example 1.
Embodiment 5: core pipe angle of bend β of the present invention is 120 degree, and other contents are same as Example 1.
Embodiment 6: core pipe angle of bend β of the present invention is 125 degree, and other contents are same as Example 1.
Claims (10)
1. prefabricated thermal insulation bilayer bend pipe, the bilayer bend pipe is used for the connection in heating direct-burying pipeline engineering transfer cornue road；It is described
Prefabricated thermal insulation bilayer bend pipe completes in factory；It is characterized in that the prefabricated thermal insulation bilayer bend pipe includes core pipe, casing, connection
Plate, annular closure plate, insulating layer, protective layer, core pipe and connecting plate, annular closure plate weld, and casing and annular closure plate weld, outside casing
If one layer of heat preservation layer, an insulating layer peripheral hardware protective layer；Core pipe nominal diameter 100mm ~ 1400mm.
2. prefabricated thermal insulation bilayer bend pipe according to claim 1, it is characterized in that the core pipe under normality or pre- Warm status and
Connecting plate, annular closure plate welding.
3. prefabricated thermal insulation bilayer bend pipe according to claim 1 or claim 2, it is characterized in that core pipe and connecting plate are in normality or preheating shape
It is welded under state by end annular closure plate and casing.
4. prefabricated thermal insulation bilayer bend pipe according to claim 1, it is characterized in that the core pipe is by core pipe elbow and core pipe elbow
Straight tube arm composition, core pipe elbow and core pipe elbow straight tube arm are that separated welding or integration complete.
5. prefabricated thermal insulation bilayer bend pipe according to claim 4, it is characterized in that the core pipe angle of bend β is 85 ~ 125 degree,
Core pipe elbow radius of curvature dimensions is not less than 1.5 times of pipeline nominal diameter.
6. prefabricated thermal insulation bilayer bend pipe according to claim 4, it is characterized in that the core pipe angle of bend β is 90 degree.
7. prefabricated thermal insulation bilayer bend pipe according to claim 4, it is characterized in that core pipe elbow straight tube arm lengths are core pipe nominals
1 times of diameter, and it is not less than 800mm.
8. prefabricated thermal insulation bilayer bend pipe according to claim 1, it is characterized in that described sleeve pipe is by casing elbow and casing elbow
Straight tube arm composition；Described sleeve pipe angle of bend is identical as core pipe angle of bend；Casing elbow radius of curvature and core pipe elbow curvature
Radius is identical, and casing elbow straight tube arm lengths are 400mm shorter than core pipe elbow straight tube arm lengths.
9. according to claim 1 or the 7 prefabricated thermal insulation bilayer bend pipes, it is characterized in that described sleeve pipe is concentric with core pipe；Casing wall
Big 1 ~ the 5mm of thickness rate core pipe wall thickness；The outer diameter of casing=core pipe outer diameter+2h+2s, h be between internal surface of sleeve pipe and core tube wall away from
From h is not more than 25 mm, and s is casing wall thickness.
10. prefabricated thermal insulation bilayer bend pipe according to claim 1, it is characterized in that connecting plate is no less than 2 pieces.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965223.XA CN109058635B (en) | 2018-08-23 | 2018-08-23 | Prefabricated heat-preservation double-layer bent pipe and preparation method thereof |
| CN202111206641.9A CN113883352B (en) | 2018-08-23 | 2018-08-23 | Prefabricated heat-insulating double-layer bent pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965223.XA CN109058635B (en) | 2018-08-23 | 2018-08-23 | Prefabricated heat-preservation double-layer bent pipe and preparation method thereof |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111206641.9A Division CN113883352B (en) | 2018-08-23 | 2018-08-23 | Prefabricated heat-insulating double-layer bent pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109058635A true CN109058635A (en) | 2018-12-21 |
| CN109058635B CN109058635B (en) | 2021-11-05 |
Family
ID=64756773
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111206641.9A Active CN113883352B (en) | 2018-08-23 | 2018-08-23 | Prefabricated heat-insulating double-layer bent pipe |
| CN201810965223.XA Active CN109058635B (en) | 2018-08-23 | 2018-08-23 | Prefabricated heat-preservation double-layer bent pipe and preparation method thereof |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202111206641.9A Active CN113883352B (en) | 2018-08-23 | 2018-08-23 | Prefabricated heat-insulating double-layer bent pipe |
Country Status (1)
| Country | Link |
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| CN (2) | CN113883352B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242826A (en) * | 2019-06-14 | 2019-09-17 | 泰州市长征冷机管件有限公司 | Exhaust elbow and preparation method thereof in a kind of freezer compressor |
| CN112329185A (en) * | 2020-12-02 | 2021-02-05 | 国网天津市电力公司电力科学研究院 | User-side distributed energy system interactive operation evaluation method |
| CN113883352A (en) * | 2018-08-23 | 2022-01-04 | 山西理工红日节能服务有限公司 | Prefabricated heat preservation double-deck return bend |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113883352A (en) * | 2018-08-23 | 2022-01-04 | 山西理工红日节能服务有限公司 | Prefabricated heat preservation double-deck return bend |
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| CN112329185A (en) * | 2020-12-02 | 2021-02-05 | 国网天津市电力公司电力科学研究院 | User-side distributed energy system interactive operation evaluation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113883352A (en) | 2022-01-04 |
| CN113883352B (en) | 2023-11-21 |
| CN109058635B (en) | 2021-11-05 |
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Effective date of registration: 20231011 Address after: 064100 Hebei Tangshan City Yutian County Hou Hu industrial gathering area Patentee after: TANGSHAN XINGBANG PIPE CONSTRUCTION EQUIPMENT Co.,Ltd. Address before: 030002 station 295, Zhongchuang space, qingqingchuang company, block a, No. 529, South Central Street, Taiyuan Xuefu Park, Shanxi comprehensive reform demonstration zone, Taiyuan City, Shanxi Province Patentee before: SHANXI LIGONG HONGRI ENERGY SAVING SERVICE Co.,Ltd. |
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