CN217030382U - Anti-stress-damage heat supply direct-buried elbow structure with double fixing ring plates - Google Patents
Anti-stress-damage heat supply direct-buried elbow structure with double fixing ring plates Download PDFInfo
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- CN217030382U CN217030382U CN202122843082.4U CN202122843082U CN217030382U CN 217030382 U CN217030382 U CN 217030382U CN 202122843082 U CN202122843082 U CN 202122843082U CN 217030382 U CN217030382 U CN 217030382U
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Abstract
The utility model relates to a stress damage prevention heat supply direct-buried elbow structure with double fixing ring plates, which is characterized by comprising an elbow, wherein the elbow is provided with a working steel pipe with a conventional curvature radius, the conventional curvature radius of the working steel pipe is 1.5DN, the two ends and the end surface of the working steel pipe are symmetrically provided with fixing ring plates which are made of the same material as the working steel pipe, and the fixing ring plates and the central line of the working steel pipe are vertically wound around a pipe body and are connected on the pipe body in a full welding manner; the pipe body is coated with the heat-insulating layer, and the end surface of the heat-insulating layer coated on the fixed ring plate close to the pipe end side pipe body is spaced from the end surface of the pipe body on the same side; the outer side of the heat-insulating layer is coated with a heat-insulating shell layer; a concrete layer coated outside the elbow is filled in a gap between the elbow and the embedded pipe groove; the insulating layer is made of polyurethane; the material of the heat preservation shell layer is polyethylene; the working steel pipe and the fixed ring plate are made of Q235B carbon steel; the concrete layer is made of C30 concrete. Has the beneficial effects that: prevent stress failure, prevent ground crack, save expense, improve construction speed and quality.
Description
Technical Field
The utility model relates to the technical field of a directly-buried heat supply pipeline elbow, in particular to a stress damage prevention heat supply directly-buried elbow structure with double fixing ring plates.
Background
At present, in the technical field of heat supply pipeline laying, cold installation construction technology is increasingly adopted, so that the situations of elbow displacement damage caused by elbow stress concentration caused by thermal expansion in the heat supply pipeline operation are increasingly increased. In order to solve the problem, in the current construction process, the commonly adopted method is to increase the curvature radius of the elbow or add soft fillers such as polyurethane plate elastic materials and the like on the outer side of the elbow so as to reduce the stress concentration of the elbow. However, the method has two problems, firstly, the consumption of the large-curvature-radius elbow with the curvature radius of more than 3.0DN is increased, the transportation is difficult, and the transportation cost is increased. Secondly, in the construction process, the pipe burying grooves needed by the large-curvature radius elbows are enlarged, so that the excavation operation surface is large, the pavement damage area is large, time and labor are wasted, and the construction cost is increased. In addition, soft packing is additionally arranged on the outer side of the elbow, the elbow deforms under heavy pressure, and the existing buried pipe groove packing adopts sand and plain soil, so that the compactness of the material is low, and the defects of ground cracking and the like are easily caused under heavy load and impact force when the pipeline is positioned under a roadway. Therefore, the protection measures not only increase the construction amount and the construction cost, but also put higher requirements on the construction quality of constructors, and finally, the damage of the elbow can not be avoided. Along with the requirement of urban development to municipal pipeline construction increases day by day, how to realize practicing thrift the operating expenses, improve construction quality and speed, ensure that heat supply buried elbow prevents stress failure and becomes the industry concern problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems and improve the prior art, and provides a stress damage prevention heat supply buried elbow structure with double fixed ring plates, so that the heat supply buried elbow can effectively prevent stress damage, save materials and construction cost, and improve the construction quality and speed.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a stress damage prevention heat supply direct-buried elbow structure with double fixing ring plates is characterized by comprising an elbow, wherein the elbow is provided with a working steel pipe with a conventional curvature radius, the conventional curvature radius of the working steel pipe is 1.5DN, fixing ring plates which are made of the same material as the working steel pipe and are symmetrically arranged at two ends of the working steel pipe and at the end face of the working steel pipe at a certain distance, and the fixing ring plates are perpendicular to the central line of the working steel pipe and are fully welded and connected to a pipe body around the pipe body; the pipe body is coated with the heat-insulating layer, and the end surface of the heat-insulating layer coated on the fixed ring plate close to the pipe end side pipe body is spaced from the end surface of the pipe body on the same side; coating a heat preservation shell layer on the outer side of the heat preservation layer; and filling a concrete layer coated on the outer side of the elbow in a gap between the elbow and the pipe burying groove.
And coating an asphalt anticorrosive layer on the surface of the fixing ring plate.
And attaching a thermal shrinkage band on a connecting gap between the fixed ring plate and the heat-insulating shell layer.
The insulating layer is made of polyurethane; the heat-insulating shell layer is made of polyethylene; the working steel pipe and the fixed ring plate are made of Q235B carbon steel; the material of the concrete layer is C30 concrete.
The diameter of the working steel pipe is DN500, and the conventional curvature radius of the working steel pipe is 1.5 DN; the thickness of the fixing ring plate is 30-50 mm; the distance between the center line of the thickness section of the fixing ring plate and the end face of the working steel pipe on the same side is 600-800mm, and the distance between the end faces of the heat-insulating layer and the heat-insulating shell layer and the end face of the working steel pipe on the same side is 300 mm; the outer diameter of the fixed ring plate is 400-600mm larger than that of the heat-insulating shell layer; the thickness of the concrete layer is more than or equal to 200 mm.
The utility model has the beneficial effects that: compared with the prior art, the heat supply direct-buried elbow structure has the advantages that the two ends of the working steel pipe are respectively additionally provided with the fixing ring plates, so that the pipeline soil retaining area is increased, the effect of preventing displacement and limiting heat stress transfer is achieved, and the elbow is effectively protected from stress damage caused by thermal expansion. Thus, the elbow is different from the existing elbow with a large curvature radius above 3.0DN, but is a conventional elbow with a 1.5DN curvature radius. Therefore, the pipe and the material for pipe burying are saved, the excavation amount of the pipe burying groove is reduced, the damage to the road surface is reduced, the labor, the working time and the freight are saved, the construction cost is reduced, and the construction quality and the construction speed are improved. Particularly, the C30 concrete is adopted to replace the prior sand and plain soil, the compactness of the C30 concrete is obviously improved compared with the sand and the plain soil, and the existing polyurethane plate soft filler is also saved, so that the foundation can be firmer, and the effect that the ground crack is not easy to generate even under the heavy load and impact force carried by the road surface is realized. The heat supply direct-buried elbow structure is suitable for popularization in the technical field of heat supply pipeline application.
Drawings
Figure 1 is a front view of the elbow of the utility model;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 is a schematic view of a concrete filling structure according to the present invention.
In the figure: the concrete heat-insulation wall comprises a fixed ring plate 1, a heat-insulation shell layer 2, a working steel pipe 3, a heat-insulation layer 4 and a concrete layer 5.
Detailed Description
The utility model provides a stress damage prevention heat supply direct-buried elbow structure with double fixing ring plates, which is characterized by comprising an elbow, wherein as shown in figures 1-2, the elbow is provided with a working steel pipe 3 with a conventional curvature radius of 1.5DN, the two ends and the end surface of the working steel pipe 3 are provided with the fixing ring plates 1 which are symmetrically arranged at intervals and made of the same material as the working steel pipe, the fixing ring plates 1 are perpendicular to the central line of the working steel pipe 3 and are fully welded on a pipe body around the pipe body, and the fixing ring plates are tightly connected on the pipe body through the full welding. The pipe body is coated with a heat preservation layer 4, and the end face of the heat preservation layer coated on the fixed ring plate close to the pipe end side pipe body keeps a distance with the end face of the pipe body on the same side. And the outer side of the heat-insulating layer 4 is coated with a heat-insulating shell layer 2. In the space between the elbow and the pipe laying groove, a concrete layer 5 covering the outside of the elbow is filled, see fig. 3.
The heat supply direct-buried elbow structure provided by the utility model has the structural size that the diameter D1 of a working steel pipe is DN500, and the adopted conventional curvature radius is 1.5 DN; the thickness c of the fixing ring plate is 30-50 mm; the distance b between the center line of the thickness section of the fixing ring plate and the end faces of the working steel pipes on the same side is 600-800mm, and the distance a between the end faces of the heat-insulating layer 4 and the heat-insulating shell layer 2 and the end faces of the working steel pipes on the same side is 300 mm; the value that the outer diameter D3 of the fixed ring plate is larger than the outer diameter D2 of the heat-preservation shell layer is 400 mm and 600 mm; the thickness of the concrete layer 5 is more than or equal to 200 mm.
In this embodiment, DN500 steel pipe is used, the outer diameter D1 of the working steel pipe is 500mm, the outer diameter D2 of the thermal insulating shell is 655mm, the outer diameter D3 of the fixed ring plate is 1155mm, and the thickness c of the fixed ring plate 1 is 40 mm.
The heat preservation layer 4 is made of polyurethane, the heat preservation shell layer 2 is made of polyethylene, the working steel pipe 3 and the fixing ring plate 1 are made of Q235B carbon steel, and the concrete layer 5 is made of C30 concrete.
In practical application, in order to prevent the working steel pipe 3 and the two fixed ring plates 1 from being corroded, the surfaces of the fixed ring plates 1 are coated with asphalt anti-corrosion layers, and heat shrinkage belts are attached to connecting gaps between the fixed ring plates 1 and the heat preservation shell layers 2 and used for plugging the gaps. The heat-shrinkable tape is a commercial product. The above is the rust-proof and caulking structure for conventional application, not shown in the figure.
Implementation and principles
The elbow is a prefabricated part, when the elbow is manufactured, full welding of a fixed ring plate is firstly carried out on a working steel pipe 3 according to a set position, and after flaw detection of a welded junction is qualified, an asphalt anticorrosive coating is integrally coated on the outer side of the fixed ring plate 1. After coating, a heat-insulating layer 4 and a heat-insulating shell layer 2 are coated on the working steel pipe 3 according to the set size. And finally, attaching a thermal shrinkage band on a connecting gap between the fixed ring plate 1 and the heat-insulating shell layer 2 to plug the gap.
When in construction, firstly, excavating at the joint of the elbow according to the size of the groove of the conventional elbow; after excavation, the prefabricated heat supply direct-buried elbow and the heat supply pipe are welded and connected in the groove, after nondestructive flaw detection is carried out on a welded junction, heat preservation treatment is carried out on a joint, after the treatment is finished, C30 concrete is filled in a gap between the elbow and the groove of the buried pipe, the concrete is coated on the outer side of the elbow, and the thickness of a concrete layer is more than or equal to 200 mm; and finally, restoring the pavement according to the road requirement.
In summary, the heat supply direct-buried elbow structure provided by the utility model is characterized in that on the basis of the prior art, two ends of a working steel pipe are respectively and additionally provided with a heat supply direct-buried elbow structureThe fixing ring plate is used for increasing the pipeline retaining area and playing a role in preventing displacement from limiting thermal stress transfer aiming at the condition that the elbow displacement is damaged due to elbow stress concentration caused by thermal expansion in the operation of the conventional heat supply pipeline, so that the elbow is effectively protected from stress damage caused by thermal expansion. Therefore, the elbow is different from the prior elbow with large curvature radius, the curvature radius of which is more than 3.0DN, and is a conventional elbow with 1.5DN curvature radius. Therefore, the excavated volume of the buried pipe groove is reduced, so that the pipe and the buried pipe materials are saved, the damage to the road surface is reduced, and the practice shows that the damaged area of the road surface can be reduced by 2m2The left and right sides, and save manpower, man-hour and freight, reduce the operating expenses, improve construction quality and speed. Particularly, the C30 concrete is adopted to replace the prior sand and plain soil, the compactness of the C30 concrete is obviously improved compared with that of the sand and the plain soil, and meanwhile, the existing polyurethane plate soft filler is saved, so that the foundation can be firmer, and the effect that the ground crack is not easy to generate even under the heavy load and impact force of the road surface is realized.
The above description is not intended to limit the present invention in any way as to its structure and shape. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are still within the scope of the technical solution of the present invention.
Claims (6)
1. A stress damage prevention heat supply direct-buried elbow structure with double fixing ring plates is characterized by comprising an elbow, wherein the elbow is provided with a working steel pipe with a conventional curvature radius, the conventional curvature radius of the working steel pipe is 1.5DN, fixing ring plates which are made of the same material as the working steel pipe and are symmetrically arranged at two ends of the working steel pipe and at the end face of the working steel pipe at a certain distance, and the fixing ring plates are perpendicular to the central line of the working steel pipe and are fully welded and connected to a pipe body around the pipe body; the pipe body is coated with the heat-insulating layer, and the end face of the heat-insulating layer coated on the pipe body at the side close to the pipe end of the fixed ring plate keeps a distance with the end face of the pipe body at the same side; coating a heat-insulating shell layer on the outer side of the heat-insulating layer; and filling a concrete layer coated on the outer side of the elbow in a gap between the elbow and the pipe burying groove.
2. The anti-stress-damage heat-supply direct-buried elbow structure with the double fixing ring plates as claimed in claim 1, wherein the surfaces of the fixing ring plates are coated with an asphalt anti-corrosion layer.
3. The anti-stress-damage heat-supply buried elbow structure with the double fixed ring plates as claimed in claim 2, wherein a heat-shrinkable tape is attached to a connecting gap between the fixed ring plate and the heat-insulating shell layer.
4. The stress-damage-prevention heat-supply directly-buried elbow structure with the double fixing ring plates as claimed in claim 1, 2 or 3, wherein the heat-insulating layer is made of polyurethane; the heat-insulating shell layer is made of polyethylene; the working steel pipe and the fixed ring plate are made of Q235B carbon steel; the material of the concrete layer is C30 concrete.
5. The anti-stress-damage heat-supply direct-buried elbow structure with the double fixing ring plates as claimed in claim 1, 2 or 3, wherein the diameter of the working steel pipe is DN500, and the conventional curvature radius of the working steel pipe is 1.5 DN; the thickness of the fixing ring plate is 30-50 mm; the distance between the center line of the thickness section of the fixing ring plate and the end face of the working steel pipe on the same side is 600-800mm, and the distance between the end faces of the heat-insulating layer and the heat-insulating shell layer and the end face of the working steel pipe on the same side is 300 mm; the outer diameter of the fixed ring plate is 400-600mm larger than that of the heat-insulating shell layer; the thickness of the concrete layer is more than or equal to 200 mm.
6. The anti-stress-damage heat-supply direct-buried elbow structure with the double fixing ring plates as claimed in claim 4, wherein the diameter of the working steel pipe is DN500, and the conventional curvature radius of the working steel pipe is 1.5 DN; the thickness of the fixing ring plate is 30-50 mm; the distance between the center line of the thickness section of the fixing ring plate and the end face of the working steel pipe on the same side is 600-800mm, and the distance between the end faces of the heat-insulating layer and the heat-insulating shell layer and the end face of the working steel pipe on the same side is 300 mm; the outer diameter of the fixed ring plate is larger than the outer diameter of the heat-preservation shell layer by 400-600 mm; the thickness of the concrete layer is more than or equal to 200 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122843082.4U CN217030382U (en) | 2021-11-19 | 2021-11-19 | Anti-stress-damage heat supply direct-buried elbow structure with double fixing ring plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122843082.4U CN217030382U (en) | 2021-11-19 | 2021-11-19 | Anti-stress-damage heat supply direct-buried elbow structure with double fixing ring plates |
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| Publication Number | Publication Date |
|---|---|
| CN217030382U true CN217030382U (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122843082.4U Active CN217030382U (en) | 2021-11-19 | 2021-11-19 | Anti-stress-damage heat supply direct-buried elbow structure with double fixing ring plates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217030382U (en) |
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2021
- 2021-11-19 CN CN202122843082.4U patent/CN217030382U/en active Active
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