CN217603621U - Two-way compensation expansion joint with straight-section outer protective pipe structure for direct-buried steam - Google Patents
Two-way compensation expansion joint with straight-section outer protective pipe structure for direct-buried steam Download PDFInfo
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- CN217603621U CN217603621U CN202220458573.9U CN202220458573U CN217603621U CN 217603621 U CN217603621 U CN 217603621U CN 202220458573 U CN202220458573 U CN 202220458573U CN 217603621 U CN217603621 U CN 217603621U
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Abstract
A two-way compensation expansion joint for direct-buried steam with a straight-section outer protective pipe structure comprises a working pipeline, an expansion joint pipeline and a fixed support; the working pipeline comprises a working outer protective pipe and a working inner protective pipe, the working outer protective pipe is sleeved outside the working inner protective pipe, and a first heat-insulating layer is filled between the working outer protective pipe and the working inner protective pipe; it has the second heat preservation to fill between expansion joint outer casing and the expansion joint intermediate pipe, the coefficient of heat conductivity of second heat preservation is less than the coefficient of heat conductivity of first heat preservation, the outside at working pipeline is fixed to the fixed bolster, the expansion joint pipeline includes the expansion joint outer casing, the expansion joint intermediate pipe, the expansion joint left side inner casing, the expansion joint right side inner casing, the left side crown plate, the right side crown plate, the left side end pipe, right side end pipe and bellows subassembly, when compensating adjacent pipeline section, because the symmetry, can make the pipeline section remain stable, reduce fixed bolster quantity, the conic section structure changes the straight section into, and the security is high.
Description
Technical Field
The utility model relates to an expansion joint technical field, what specifically say so is a two-way compensation expansion joint is used to direct-burried steam with straight section outer casing structure.
Background
Expansion joints are needed to compensate for thermal displacement of pipelines in a direct-buried steam pipe network, and fixing supports are arranged at two ends of the expansion joints in the steam pipe network at present to ensure that the thermal displacement of each pipe section between the fixing supports can be effectively absorbed.
Because the maximum diameter of the expansion joint is larger than that of the working pipe, in order to ensure that the heat-insulating performance of the expansion section can meet the requirement, the material of the heat-insulating layer of the expansion section is the same as that of the working pipe section, and the thickness of the heat-insulating layer of the expansion section is the same as that of the working pipe section. Therefore, the diameter of the outer protecting pipe of the expansion section is correspondingly enlarged relative to that of the working pipe section, and the outer protecting pipes are connected by adopting a conical section structure. The conical section structure is high in design and manufacturing cost, poor in construction and installation manufacturability, and has the problems of structural discontinuity and stress concentration, leakage easily occurs, underground water enters the heat insulation layer, the heat insulation layer is made to be invalid, and the working pipe is corroded.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a two-way compensation expansion joint is used to direct-burried steam with outer pillar structure of straight section when compensating adjacent pipeline section, because the symmetry can make the pipeline section remain stable, reduces fixed bolster quantity, and the conic section structure changes the straight section into, and the security is high.
In order to realize the technical purpose, the adopted technical scheme is as follows: a two-way compensation expansion joint for direct-buried steam with a straight-section outer protective pipe structure comprises a working pipeline, an expansion joint pipeline and a fixed support;
the working pipeline comprises a working outer protective pipe and a working inner protective pipe, the working outer protective pipe is sleeved outside the working inner protective pipe, and a first heat-insulating layer is filled between the working outer protective pipe and the working inner protective pipe;
the expansion joint pipeline comprises an expansion joint outer protection pipe, an expansion joint middle pipe, an expansion joint left side inner protection pipe, an expansion joint right side inner protection pipe, a left side ring plate, a right side ring plate, a left side end pipe, a right side end pipe and a corrugated pipe assembly, wherein the two ends of the expansion joint outer protection pipe are respectively welded with a working outer protection pipe, the expansion joint outer protection pipe and the working outer protection pipe are straight pipes with equal diameters, the diameters of the expansion joint outer protection pipe and the working outer protection pipe are equal, the expansion joint outer protection pipe is sleeved outside the expansion joint middle pipe, a second heat insulation layer is filled between the expansion joint outer protection pipe and the expansion joint middle pipe, the heat conductivity of the second heat insulation layer is smaller than that of the first heat insulation layer, the expansion joint middle pipe is sleeved outside the expansion joint left side inner protection pipe and the expansion joint right side inner protection pipe, the expansion joint left side inner protection pipe and the expansion joint right side inner protection pipe are respectively welded with the working inner protection pipes on the corresponding sides, the expansion joint left side inner protection pipe and the expansion joint right side inner protection pipe are sleeved with the corrugated pipe, the left side corrugated pipe assembly and the expansion joint left side corrugated pipe assembly is welded with the expansion joint middle pipe through the left side end pipe and the right side ring plate, and the right side corrugated pipe assembly;
the fixed support is fixed on the outer side of the working pipeline.
The diameters of the inner protecting pipe on the left side of the expansion joint, the inner protecting pipe on the right side of the expansion joint and the working inner protecting pipe are the same.
The second heat-insulating layer is formed by compounding a heat-insulating material with the heat conductivity coefficient less than 0.025W/m.K and a heat-insulating material with the heat conductivity coefficient between 0.25 and 0.5W/m.K.
The total thickness of the thermal insulation material with the thermal conductivity coefficient less than 0.025W/m.K is more than 10mm.
The utility model discloses beneficial effect is: two adjacent pipe sections can adopt one bidirectional expansion joint, so that one fixing bracket is saved, and the construction cost is reduced; the expansion section outer protection pipe and the working pipe section outer protection pipe are directly connected with the same specification pipeline, so that the failure risk is reduced; through the insulation construction improvement, under the prerequisite of guaranteeing that thermal insulation performance meets the demands, change the conic section structure into straight section between expansion joint and pipeline, improve the fail safe nature of structure, reduce the inefficacy risk.
Drawings
FIG. 1 is a schematic diagram of a prior art structure;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of a first structure of the expansion joint pipe of the present invention;
FIG. 4 is a second schematic structural view of the expansion joint pipe of the present invention;
FIG. 5 is a third schematic view of the expansion joint pipe of the present invention;
FIG. 6 is a schematic view of a fourth structure of the expansion joint pipe of the present invention;
in the figure: 1. working pipeline, 2, expansion joint pipeline, 3, fixed bolster, 101, the outer pillar of work, 102, the inner pillar of work, 103, first heat preservation, 201, the outer pillar of expansion joint, 202, the intermediate pipe of expansion joint, 203, the inner pillar in expansion joint left side, 204, the interior pipe of imitating of expansion joint right side, 205, left side crown plate, 206, right side crown plate, 207, left side end pipe, 208, right side end pipe, 209, bellows subassembly, 210, second heat preservation.
Detailed Description
The utility model provides a direct-burried is two-way compensation expansion joint for steam with outer pillar structure of straight section, includes working pipeline 1, expansion joint pipeline 2 and fixed bolster 3, and working pipeline 1 and expansion joint pipeline 2 directly link, and the expansion joint absorbs the pipeline thermal displacement that length is 2L.
The working pipeline 1 comprises a working outer protection pipe 101 and a working inner protection pipe 102, the working outer protection pipe 101 is sleeved outside the working inner protection pipe 102, a first heat preservation layer 103 is filled between the working outer protection pipe 101 and the working inner protection pipe 102, and the material of the first heat preservation layer is the same as that used in a steam direct-buried pipe in the prior art.
Expansion joint pipeline 2 is symmetrical two-way compensation structure, including expansion joint outer casing 201, expansion joint intermediate pipe 202, expansion joint left side inner casing 203, expansion joint right side inner casing 204, left side crown plate 205, right side crown plate 206, left side end pipe 207, right side end pipe 208 and bellows subassembly 209, a work outer casing 101 is welded respectively at the both ends of expansion joint outer casing 201, and expansion joint outer casing 201 is the constant diameter straight tube and the diameter equals with work outer casing 101, avoids the discontinuous and stress concentration scheduling problem of structure, effectively improves outer casing connection reliability. The outer expansion joint protection pipe 201 is sleeved outside the intermediate expansion joint pipe 202, a second heat insulation layer 210 is filled between the outer expansion joint protection pipe 201 and the intermediate expansion joint pipe 202, the heat conductivity coefficient of the second heat insulation layer 210 is smaller than that of the first heat insulation layer 103, the intermediate expansion joint pipe 202 is sleeved outside the inner expansion joint left side protection pipe 203 and the inner expansion joint right side protection pipe 204, the inner expansion joint left side protection pipe 203 and the inner expansion joint right side protection pipe 204 are respectively welded with the inner work protection pipe 102 on the corresponding side, the inner expansion joint left side protection pipe 203 and the inner expansion joint right side protection pipe 204 are sleeved with corrugated pipe assemblies 209, the left corrugated pipe assemblies 209 are welded with the left end of the intermediate expansion joint pipe 202 through a left side end pipe 207 and a left side ring plate 205, and the right corrugated pipe assemblies 209 on the right side are welded with the right end of the intermediate expansion joint pipe 202 through a right side end pipe 208 and a right side ring plate 206.
The fixed bolster 3 is fixed in the outside of working pipeline 1, and the length that originally separates into by three fixed bolster among the prior art is two independent pipeline sections of L respectively, adopts 2 one-way expansion joints to compensate respectively. The pipeline is adjusted to be a pipeline section of 2L total length separated by two end fixing supports through the technical design, 1 bidirectional expansion joint is adopted to compensate thermal displacement, and a middle fixing support is saved on the premise of meeting pipeline compensation requirements.
The diameters of the expansion joint left inner protection pipe 203, the expansion joint right inner protection pipe 204 and the working inner protection pipe 102 are the same, and a guide cylinder can be connected to the expansion joint left inner protection pipe 203.
The second insulating layer 210 is formed by compounding an insulating material having a thermal conductivity of less than 0.025W/m.K and an insulating material having a thermal conductivity of 0.25-0.5W/m.K. Fig. 3, 4, 5 and 6 are three schematic diagrams of straight-section connection bidirectional expansion joint outer protective pipes and heat insulation structures. In fig. 3, the thermal insulation material with a thermal conductivity of less than 0.025W/m.k is located at the inner side, i.e., the position of the expansion joint intermediate pipe 202, the thickness of the thermal insulation material with a thermal conductivity of 0.25-0.5W/m.k is greater than that of the thermal insulation material with a thermal conductivity of less than 0.025W/m.k, fig. 4 compares with fig. 3, the thickness of the thermal insulation material with a thermal conductivity of 0.25-0.5W/m.k is less than that of the thermal insulation material with a thermal conductivity of less than 0.025W/m.k, fig. 5 compares with fig. 3, the thermal insulation material with a thermal conductivity of less than 0.025W/m.k is located at the outer side, i.e., the position of the expansion joint outer pipe 201, and the second thermal insulation layer 210 in fig. 6 can all adopt the thermal insulation material with a thermal conductivity of less than 0.025W/m.k.
The total thickness of the heat-insulating material with the heat conductivity coefficient less than 0.025W/m.K is more than 10mm, so that the better effect can be achieved, and the direct connection and continuity reliability of the working outer protective pipe and the expansion joint outer protective pipe can be ensured.
Claims (2)
1. The utility model provides a two-way compensation expansion joint is used to direct-burried steam with outer protective tube structure of straight section, includes working line (1), expansion joint pipeline (2) and fixed bolster (3), its characterized in that:
the working pipeline (1) comprises a working outer protective pipe (101) and a working inner protective pipe (102), the working outer protective pipe (101) is sleeved on the outer side of the working inner protective pipe (102), and a first heat-insulating layer (103) is filled between the working outer protective pipe (101) and the working inner protective pipe (102);
the expansion joint pipeline (2) comprises an expansion joint outer protecting pipe (201), an expansion joint middle pipe (202), an expansion joint left side inner protecting pipe (203), an expansion joint right side inner protecting pipe (204), a left side ring plate (205), a right side ring plate (206), a left side end pipe (207), a right side end pipe (208) and a corrugated pipe assembly (209), two ends of the expansion joint outer protecting pipe (201) are respectively welded with one working outer protecting pipe (101), the expansion joint outer protecting pipe (201) and the working outer protecting pipe (101) are straight pipes with equal diameters and are equal in diameter, the expansion joint outer protecting pipe (201) is sleeved on the outer side of the expansion joint middle pipe (202), a second heat insulating layer (210) is filled between the expansion joint outer protecting pipe (201) and the expansion joint middle pipe (202), the heat conductivity of the second heat insulating layer (210) is smaller than that of a first heat insulating layer (103), the expansion joint middle protecting pipe (202) is sleeved on the expansion joint left side inner protecting pipe (203), the expansion joint right side inner protecting pipe (204), the expansion joint left side inner protecting pipe (203) and the expansion joint right side inner protecting pipe (204) are respectively welded with the working inner protecting pipe (203) on the corresponding side, the left side, the expansion joint inner protecting pipe assembly (209) and the expansion joint inner protecting pipe (204) is sleeved on the expansion joint left side, and the expansion joint inner protecting pipe assembly (209), the right corrugated pipe assembly (209) is welded with the right end of the expansion joint middle pipe (202) through a right end pipe (208) and a right annular plate (206);
the fixed support (3) is fixed on the outer side of the working pipeline (1).
2. The bidirectional compensating expansion joint for the directly buried steam, which has the straight-section outer casing structure, according to claim 1, wherein: the diameters of the expansion joint left inner protection pipe (203), the expansion joint right inner protection pipe (204) and the working inner protection pipe (102) are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220458573.9U CN217603621U (en) | 2022-03-04 | 2022-03-04 | Two-way compensation expansion joint with straight-section outer protective pipe structure for direct-buried steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220458573.9U CN217603621U (en) | 2022-03-04 | 2022-03-04 | Two-way compensation expansion joint with straight-section outer protective pipe structure for direct-buried steam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217603621U true CN217603621U (en) | 2022-10-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220458573.9U Active CN217603621U (en) | 2022-03-04 | 2022-03-04 | Two-way compensation expansion joint with straight-section outer protective pipe structure for direct-buried steam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217603621U (en) |
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2022
- 2022-03-04 CN CN202220458573.9U patent/CN217603621U/en active Active
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