CN215258450U - Reinforced three-way structure for directly-buried laying of thermal pipeline - Google Patents
Reinforced three-way structure for directly-buried laying of thermal pipeline Download PDFInfo
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- CN215258450U CN215258450U CN202121119912.2U CN202121119912U CN215258450U CN 215258450 U CN215258450 U CN 215258450U CN 202121119912 U CN202121119912 U CN 202121119912U CN 215258450 U CN215258450 U CN 215258450U
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Abstract
The invention discloses a reinforced tee joint structure of a directly-buried laying thermal pipeline, which solves the problem of how to strengthen the directly-buried laying thermal pipeline with high quality. The wall thickness of the three-way main pipe orifice (2) is equal to the wall thickness of the directly-buried thermal main pipe (1) plus 2 mm, and the wall thickness of the three-way branch pipe orifice (3) is 1.5 times of the wall thickness of the directly-buried thermal branch pipe (4); the three-way pipe orifice and the branch pipe orifice are connected at the shoulder part, the shoulder annular reinforcing buckle plate (5) is arranged, the belly of the three-way pipe orifice is provided with an abdomen arc reinforcing support plate (6), the two ends of the abdomen arc reinforcing support plate are welded with the shoulder annular reinforcing buckle plate (5) respectively, the abdomen arc reinforcing support plate and the shoulder annular reinforcing buckle plate form a hoop structure for directly burying and laying a heating power main pipeline, the shoulder annular reinforcing buckle plate and the three-way branch pipe orifice (3) are arranged between, and triangular reinforcing rib plates (7) are arranged at equal intervals in radian. The method is particularly suitable for strengthening the tee joint of the large-diameter direct-buried thermal pipeline.
Description
Technical Field
The invention relates to a tee joint with a reinforcing plate for directly-buried laying of a heating power pipeline, which is suitable for large-scale production in factories and can also be used for reinforcing unqualified tee joints in construction sites.
Background
The surface of the directly-buried laying thermal pipeline and a tee joint thereof is covered with a polyurethane rigid foam heat-insulating layer and a high-density polyethylene rigid plastic outer protective pipe (black jacket) to form a three-in-one structure so as to ensure the heat source conveying of the directly-buried laying thermal pipeline; the tee joint is used as a component of a directly-buried laying thermal pipeline, is an important component of the pipeline, and has the functions of pipeline redirection, flow distribution and the like; the analysis is carried out from the mechanical angle, the tee joint is a part with concentrated stress in the pipeline, not only bears the internal pressure generated by hot water in the pipeline and the external pressure of soil, but also bears the action of bending moment, torque and axial force caused by expansion of the pipeline connected with the tee joint due to heating, and simultaneously also bears the action of high-speed scouring of internal media, so that the stress of the tee joint is very complex; research on the damaged tee joint of the directly-buried laying thermal pipeline shows that in the damaged pipeline tee joint, damage occurs in the shoulder part (the area near the intersecting line connecting the main pipe of the tee joint with the branch pipe) and the abdomen part (the area of the main pipe opposite to the branch pipe) of the tee joint, finite element analysis software is adopted to carry out simulation analysis on the tee joint, and the maximum stress mainly occurs in the shoulder part and the abdomen area of the tee joint; at present, in engineering practice, common methods for strengthening the tee joint comprise integral strengthening, reinforcing rib strengthening, reinforcing plate strengthening, rib plate strengthening and the like, wherein the integral strengthening is to thicken the wall thickness of a main pipe and the wall thickness of a branch pipe of the tee joint, and although the mode can meet the stress requirement of the tee joint, the defects of heavy weight and high cost of the tee joint exist; the reinforcing rib reinforcement is to weld a single reinforcing steel bar with the wall thickness of at least 1.5 times of the main pipe at the welding joint between the main pipe and the branch pipe of the tee joint and the belly position of the main pipe, the method is generally suitable for the tee joint on the overhead pipeline with small pipe diameter only bearing internal pressure, and the tee joint for directly laying the thermal pipeline, which has larger axial force generated by expansion and contraction of the pipeline and larger bending moment of the branch pipe, cannot be adopted; the reinforcing plate is reinforced by adopting an equal area method or a pressure area method to stick and weld a circle of annular steel plate on the main pipe around the hole of the main pipe of the tee joint according to the method for reinforcing the hole of the pressure container, and the material of the annular steel plate is the same as that of the tee joint; the rib plate reinforcement is to weld a plurality of rib plates along the welding seam around the opening of the main pipe of the tee joint, and the rib plates are perpendicular to the branch pipe and the main pipe of the tee joint.
Disclosure of Invention
The invention provides a reinforced tee joint structure of a directly-buried laying thermal pipeline, which solves the technical problem of how to strengthen a tee joint of the directly-buried laying thermal pipeline with high quality.
The invention solves the technical problems by the following technical scheme:
the general concept of the invention is: the general concept of the invention is: according to a pressure area method for reinforcing the holes of the pressure container, scientifically recombining the wall thickness of a main pipeline, the wall thickness of a branch pipeline and the wall thickness of a tee joint of the directly-buried laying heating power which are connected together so as to find a scheme for reducing the stress of the belly and the shoulder of the tee joint as much as possible; the tee branch pipe is thickened, then the tee is reinforced by connecting two rings at the belly and the shoulder of the tee, and the reinforced two rings of the belly and the shoulder of the tee are connected with the tee branch pipe into a whole by uniformly distributed rib plates so as to achieve the comprehensive reinforcement of the tee of the directly-buried thermal pipeline.
A reinforced three-way structure of a directly-buried laying thermal pipeline comprises a directly-buried laying thermal main pipeline, a directly-buried laying thermal branch pipeline and a three-way, wherein a three-way main pipeline opening and a three-way branch pipeline opening are formed in the three-way, the three-way main pipeline opening is connected with the directly-buried laying thermal main pipeline, the three-way branch pipeline opening is connected with the directly-buried laying thermal branch pipeline, the wall thickness of the three-way main pipeline opening is equal to the wall thickness of the directly-buried laying thermal main pipeline plus 2 mm, and the wall thickness of the three-way branch pipeline opening is 1.5 times of the wall thickness of the directly-buried laying thermal branch pipeline; the hoop structure is characterized in that a shoulder annular reinforcing buckle plate is arranged at the connecting shoulder part of a main pipe orifice and a branch pipe orifice of the tee joint, an abdomen arc reinforcing support plate is arranged at the abdomen of the tee joint, two ends of the abdomen arc reinforcing support plate are respectively welded with the shoulder annular reinforcing buckle plate, the abdomen arc reinforcing support plate and the shoulder annular reinforcing buckle plate form a hoop structure for directly burying and laying a main heating power pipeline, reinforcing rib plates are arranged between the shoulder arc reinforcing buckle plate and the three branch pipe orifice at equal intervals in an arc shape, the reinforcing rib plates are perpendicular to the three branch pipe orifice and the shoulder annular reinforcing buckle plate at the same time, and each reinforcing rib plate is composed of three sides, wherein two sides are straight sides, and one side is an arc side; one straight edge is welded with the port of the three-way branch pipe, one arc edge is welded with the shoulder annular reinforced buckle plate, and the other straight edge is connected with the port of the three-way branch pipe and the edge of the shoulder annular reinforced buckle plate.
The shoulder annular reinforcing buckle plate is welded on the shoulder of the directly-buried thermal main pipeline, and the material of the shoulder annular reinforcing buckle plate is the same as that of the directly-buried thermal main pipeline; the belly arc-shaped reinforcing supporting plate is welded on the belly of the directly-buried heating power main pipeline, and the material of the belly arc-shaped reinforcing supporting plate is the same as that of the directly-buried heating power main pipeline; the horizontal right-angle side of the reinforcing rib plate is welded with the shoulder annular reinforcing buckle plate, the vertical right-angle side of the reinforcing rib plate is welded with the three-way branch pipe port, and the material of the reinforcing rib plate is the same as that of the directly-buried thermal main pipeline.
The width of the shoulder annular reinforcing buckle plate is 200-300 mm, and the thickness of the shoulder annular reinforcing buckle plate is the same as the wall thickness of the three-way branch pipe orifice; the width of the abdomen arc-shaped reinforcing supporting plate is 200 mm and 300 mm, and the thickness of the abdomen arc-shaped reinforcing supporting plate is the same as the wall thickness of the three-way branch pipe orifice; the length of the arc edge of the reinforcing rib plate is 200-300 mm, the length is equal to the width of the abdomen arc-shaped reinforcing supporting plate, the height of one straight edge of the reinforcing rib plate connected with the three-way branch pipe opening is 50 mm, the other straight edge of the reinforcing rib plate is connected with the three-way branch pipe opening and the edge of the shoulder annular reinforcing buckle plate, and the thickness of the reinforcing rib plate is equal to the wall thickness of the three-way branch pipe opening.
The outer side wall of the tee joint is coated with a polyurethane rigid foam heat-insulating layer, and a high-density polyethylene rigid plastic outer protective pipe is arranged on the polyurethane rigid foam heat-insulating layer.
The invention has the beneficial effects that: according to the principle of 'pressure area method' of pressure container perforated reinforcement, annular steel plates are welded on the shoulder and the belly of the tee joint in an attaching mode, the structure, rib plate reinforcement and integral reinforcement are combined together to form a reinforced tee joint structure, and the stress condition of the directly-buried thermal pipeline tee joint is met. Finite element analysis software is adopted to carry out simulation calculation on the reinforced tee joint structure, and the requirements of strength, stress and fatigue analysis of the directly-buried thermal pipeline under the worst condition can be met.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a sectional view taken along line A-A in FIG. 1;
fig. 3 is a schematic structural diagram of the present invention connected to a main direct-buried thermal pipeline 1 and a branch direct-buried thermal pipeline 4.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
a reinforced three-way structure of a directly-buried laying thermal pipeline comprises a directly-buried laying thermal main pipeline 1, a directly-buried laying thermal branch pipeline 4 and a three-way, wherein a three-way main pipeline opening 2 and a three-way branch pipeline opening 3 are arranged on the three-way, the three-way main pipeline opening 2 is connected with the directly-buried laying thermal main pipeline 1, the three-way branch pipeline opening 3 is connected with the directly-buried laying thermal branch pipeline 4, the wall thickness of the three-way main pipeline opening 2 is equal to the wall thickness of the directly-buried laying thermal main pipeline 1 plus 2 mm, and the wall thickness of the three-way branch pipeline opening 3 is 1.5 times that of the wall thickness of the directly-buried laying thermal branch pipeline 4; at the tee bend be responsible for the mouth with the shoulder of being connected of branch pipe mouth department, be provided with shoulder annular enhancement buckle 5, it strengthens layer board 6 to be provided with the belly arc at tee bend belly, the both ends that layer board 6 is strengthened to the belly arc are strengthened the buckle 5 welding with the shoulder annular respectively and are in the same place, belly arc is strengthened layer board 6 and shoulder annular enhancement buckle 5 and are constituteed the staple bolt structure of directly burying laying heating power trunk line 1, strengthen between buckle 5 and the three branch pipe mouth 3 at the shoulder annular, be provided with reinforced rib plate 7 with equidistant radian ground.
The shoulder annular reinforcing buckle 5 is welded on the shoulder of the directly-buried thermal main pipeline 1, and the material of the shoulder annular reinforcing buckle 5 is the same as that of the directly-buried thermal main pipeline 1; the belly arc-shaped reinforcing supporting plate 6 is welded on the belly of the directly-buried heating power main pipeline 1, and the material of the belly arc-shaped reinforcing supporting plate 6 is the same as that of the directly-buried heating power main pipeline 1; the horizontal right-angle side of the reinforcing rib plate 7 is welded with the shoulder annular reinforcing buckle 5, the vertical right-angle side of the reinforcing rib plate 7 is welded with the three-way branch pipe orifice 3, and the material of the reinforcing rib plate 7 is the same as that of the directly-buried thermal main pipeline 1.
The width of the shoulder annular reinforcing buckle plate 5 is 200-300 mm, and the thickness of the shoulder annular reinforcing buckle plate 5 is the same as the wall thickness of the three-way branch pipe orifice 3; the width of the abdomen arc-shaped reinforcing supporting plate 6 is 200 mm and 300 mm, and the thickness of the abdomen arc-shaped reinforcing supporting plate 6 is the same as the wall thickness of the three-way branch pipe orifice 3; the length of the arc edge of the reinforcing rib plate 7 is 200-300 mm, the length is equal to the width of the abdomen arc-shaped reinforcing supporting plate 6, the height of one straight edge of the reinforcing rib plate 7 connected with the three-way branch pipe orifice 3 is 50 mm, the other straight edge is connected with the edges of the three-way branch pipe orifice 3 and the shoulder annular reinforcing buckling plate 5, and the thickness of the reinforcing rib plate 7 is the same as the wall thickness of the three-way branch pipe orifice 3.
The outer side wall of the tee joint is coated with a polyurethane rigid foam heat-insulating layer 8, and a high-density polyethylene rigid plastic outer protective pipe 9 is arranged on the polyurethane rigid foam heat-insulating layer 8.
The wall thickness of the tee main pipe orifice 2 is selected to be 2 mm greater than that of a directly-buried thermal main pipe 1 connected with a tee main pipe; the wall thickness of the branch pipe orifice 3 of the tee is selected to be 1.5 times of the wall thickness of a directly-buried thermal branch pipeline 4, a circle of shoulder annular reinforcing buckle plate 5 is welded around the opening of the main pipe of the tee, the material is the same as that of the tee, the wall thickness of the shoulder annular reinforcing buckle plate 5 is the same as that of the pipeline of the branch pipe orifice 3 of the tee, the width is determined according to the nominal diameter of the branch pipe orifice 3 of the tee, and the range is 200 plus 300 mm; a circle of abdomen arc-shaped reinforcing support plates 6 are arranged on the abdomen of the tee joint, the material of the abdomen arc-shaped reinforcing support plates 6 is the same as that of the tee joint, and the wall thickness of the abdomen arc-shaped reinforcing support plates 6 is the same as that of the pipeline of the branch pipe orifice 3 of the tee joint; the method comprises the following steps that a plurality of reinforcing rib plates 7 for connecting the outer wall of a branch pipe port of the tee joint and an annular shoulder reinforcing buckle plate 5 are arranged around a tee joint opening at equal intervals in a radian mode, the number of the reinforcing rib plates 7 is determined according to the nominal diameter of the branch pipe port of the tee joint, the reinforcing rib plates 7 are perpendicular to the branch pipe port of the tee joint and the annular shoulder reinforcing buckle plate 5 and are evenly distributed along the periphery of the opening, the length of the arc edge of each reinforcing rib plate 7 is 200-300 mm and is equal to the width of an arc reinforcing supporting plate 6 of the abdomen, the height of one straight edge of each reinforcing rib plate 7 connected with the branch pipe port of the tee joint is 50 mm, the other straight edge of each reinforcing rib plate 7 is connected with the branch pipe port of the tee joint and the edge of the annular shoulder reinforcing buckle plate 5, welding among a main pipe of the tee joint, the branch pipe, the annular reinforcing plate, the abdomen reinforcing plate and the rib plates is required to be welded completely, and all connecting parts are welded with the tee joint; the outer side wall of the reinforced tee joint structure is coated with a polyurethane rigid foam heat-insulating layer 8, and the polyurethane rigid foam heat-insulating layer 8 is coated with a high-density polyethylene rigid plastic outer protective pipe 9 to form a three-in-one structure, so that the requirement of directly-buried laying of the thermal pipeline tee joint is met.
Claims (4)
1. A reinforced three-way structure of a directly-buried laying thermal pipeline comprises a directly-buried laying thermal main pipeline (1), a directly-buried laying thermal branch pipeline (4) and a three-way, wherein a three-way main pipe orifice (2) and a three-way branch pipe orifice (3) are arranged on the three-way, the three-way main pipe orifice (2) is connected with the directly-buried laying thermal main pipeline (1), and the three-way branch pipe orifice (3) is connected with the directly-buried laying thermal branch pipeline (4), and the reinforced three-way structure is characterized in that the wall thickness of the three-way main pipe orifice (2) is equal to the wall thickness of the directly-buried laying thermal main pipeline (1) plus 2 mm, and the wall thickness of the three-way branch pipe orifice (3) is 1.5 times of the wall thickness of the directly-buried laying thermal branch pipeline (4); the three-way shoulder of being connected of being responsible for mouth and branch mouth is located, be provided with shoulder annular enhancement buckle (5), it strengthens layer board (6) to be provided with the belly arc at the three-way belly, the both ends that layer board (6) were strengthened to the belly arc are strengthened the buckle (5) welding together with shoulder annular respectively, the hoop structure of directly burying heating power trunk line (1) is constituteed with shoulder annular enhancement buckle (5) to belly arc enhancement layer board (6), strengthen between buckle (5) and the three-way branch mouth of pipe (3) shoulder annular enhancement, be provided with enhancement floor (7) at equidistant radian ground.
2. The reinforced tee joint structure of the directly-buried thermal pipeline according to claim 1, wherein the shoulder annular reinforcing buckle plates (5) are welded on the shoulders of the directly-buried thermal main pipeline (1), and the material of the shoulder annular reinforcing buckle plates (5) is the same as that of the directly-buried thermal main pipeline (1); the belly arc-shaped reinforcing supporting plate (6) is welded on the belly of the directly-buried heating power main pipeline (1), and the material of the belly arc-shaped reinforcing supporting plate (6) is the same as that of the directly-buried heating power main pipeline (1); the horizontal right-angle side of the reinforcing rib plate (7) is welded with the shoulder annular reinforcing buckle plate (5), the vertical right-angle side of the reinforcing rib plate (7) is welded with the three-way branch pipe opening (3), and the material of the reinforcing rib plate (7) is the same as that of the directly-buried thermal main pipeline (1).
3. The reinforced tee structure for directly buried thermal pipelines according to claim 2, wherein the width of the shoulder annular reinforcing buckle plate (5) is 200-300 mm, and the thickness of the shoulder annular reinforcing buckle plate (5) is the same as the wall thickness of the tee branch pipe orifice (3); the width of the abdomen arc-shaped reinforcing supporting plate (6) is 200 mm and 300 mm, and the thickness of the abdomen arc-shaped reinforcing supporting plate (6) is the same as the wall thickness of the three-way branch pipe orifice (3); the length of the arc edge of the reinforcing rib plate (7) is 200-300 mm, the length is equal to the width of the abdomen arc-shaped reinforcing supporting plate (6), the height of one straight edge of the reinforcing rib plate (7) connected with the three-way branch pipe orifice (3) is 50 mm, the other straight edge is connected with the three-way branch pipe orifice (3) and the edge of the shoulder annular reinforcing buckling plate (5), and the thickness of the reinforcing rib plate (7) is the same as the wall thickness of the three-way branch pipe orifice (3).
4. A reinforced tee structure for a directly-buried pipeline, according to claim 1, 2 or 3, characterized in that the outer side wall of the tee is covered with a polyurethane rigid foam insulation layer (8), and the polyurethane rigid foam insulation layer (8) is provided with a high-density polyethylene rigid plastic outer protection pipe (9).
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| CN202121119912.2U CN215258450U (en) | 2021-05-24 | 2021-05-24 | Reinforced three-way structure for directly-buried laying of thermal pipeline |
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| CN202121119912.2U CN215258450U (en) | 2021-05-24 | 2021-05-24 | Reinforced three-way structure for directly-buried laying of thermal pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113217738A (en) * | 2021-05-24 | 2021-08-06 | 中国能源建设集团山西省电力勘测设计院有限公司 | Reinforced three-way structure for directly-buried laying of thermal pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217738A (en) * | 2021-05-24 | 2021-08-06 | 中国能源建设集团山西省电力勘测设计院有限公司 | Reinforced three-way structure for directly-buried laying of thermal pipeline |
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