CN215410857U - Steel casing steam direct-buried pipeline - Google Patents
Steel casing steam direct-buried pipeline Download PDFInfo
- Publication number
- CN215410857U CN215410857U CN202122098304.4U CN202122098304U CN215410857U CN 215410857 U CN215410857 U CN 215410857U CN 202122098304 U CN202122098304 U CN 202122098304U CN 215410857 U CN215410857 U CN 215410857U
- Authority
- CN
- China
- Prior art keywords
- pipe
- steel
- sections
- steel sleeve
- bracket
- 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.)
- Active
Links
Images
Landscapes
- Thermal Insulation (AREA)
Abstract
The utility model discloses a steel sleeve steam direct-buried pipeline, which comprises a working pipe, an outer sleeve, a direct-buried bracket and a compensator, wherein the working pipe is arranged on the outer sleeve; the working pipe is arranged in the outer sleeve and comprises a plurality of working pipe sections provided with composite heat-insulating layers, the inner pipe of the compensator is connected to one of the working pipe sections, all the working pipe sections are sequentially welded and connected, and the exposed part of the pipe head joint is provided with the composite heat-insulating layer; the outer sleeve comprises a plurality of steel sleeve sections and two piece type joint sections, one end of the outer pipe of the compensator is connected with one steel sleeve section through one piece type joint section in a welding mode, one end of one steel sleeve section is connected with the other steel sleeve section through the other piece type joint section in a welding mode, and the other end of the outer pipe of the compensator is connected with the other end of the outer pipe of the compensator in a welding mode through the other steel sleeve sections. Compared with the traditional joint coating structure, the utility model can effectively reduce the number of welding seams at the joint coating, thereby improving the quality and the construction efficiency of the joint coating and reducing the welding operation amount and the construction cost.
Description
Technical Field
The utility model belongs to the technical field of low-energy-consumption long-distance heat supply network steam pipeline transportation, and particularly relates to a steel sleeve steam directly-buried pipeline.
Background
With the deep promotion of national energy saving and emission reduction work, the construction of a centralized heat supply project is greatly promoted in all regions, the centralized heat supply is divided into civil heating hot water heat supply and industrial steam heat supply, and the arrangement modes of pipelines are 3: overhead laying, trench laying and direct-buried laying. Because the technology of the prefabricated direct-buried heat insulation pipe is mature, most of heat supply network pipelines in special fields relating to roads, enterprise gates, residential areas, planning requirements and the like are buried underground, meanwhile, the buried pipelines do not occupy the ground space, and a long-distance direct-buried pipeline laying mode is adopted in many areas.
Aiming at the prior common steel sleeve steel steam direct-buried prefabricated pipeline, particularly when the pipeline is continuously and directly buried and laid in a long distance, the joint coating construction of the steel outer protecting pipe is troublesome, the welding workload is large, the construction efficiency is low, and the construction cost is high.
Meanwhile, the installation and construction of pressure pipelines built in China or in the process of building are in an irregular stage, so that a plurality of unscientific and unreasonable places exist, the manufacturing process is complicated, the manufacturing cost is high, and the construction quality is easy to cause problems.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the steel sleeve steam direct-buried pipeline can reduce the number of welding seams at a joint coating, further improve the quality and the construction efficiency of the joint coating, and reduce the welding workload and the construction cost.
The utility model is realized by the following steps: a steel sleeve steam direct-buried pipeline comprises a working pipe, an outer sleeve, a direct-buried bracket and a compensator;
the working pipe is arranged in the outer sleeve and comprises a plurality of working pipe sections provided with composite heat-insulating layers, the inner pipe of the compensator is connected to one of the working pipe sections, all the working pipe sections are sequentially welded and connected, and the exposed part of the pipe head joint is provided with the composite heat-insulating layer;
the outer sleeve comprises a plurality of steel sleeve sections and two piece type opening repairing sections, one end of the outer pipe of the compensator is connected with one steel sleeve section through one piece type opening repairing section in a welding mode, one end of one steel sleeve section is connected with the other steel sleeve section through the other piece type opening repairing section in a welding mode, and the other end of the outer pipe of the compensator is connected with the other end of the outer pipe of the compensator in a welding mode through the other steel sleeve sections.
Furthermore, the piece-separating type repaired mouth section comprises three arc-shaped pieces which are evenly divided in the circumferential direction, and the arc-shaped pieces are connected in a welding mode in the circumferential direction.
Furthermore, fire-proof layers are arranged on the outer sides of the composite heat-insulating layers at the joints of the sections of the working pipe and the joints of the sections of the outer sleeve.
Further, the fire-proof layer is fixed by steel wires in a bundling mode.
Further, the composite heat insulation layer comprises a plurality of heat insulation layers and a reflection layer, and the reflection layer is wrapped outside each heat insulation layer and is bundled and fixed by a binding tape.
Further, the reflecting layer sequentially comprises an aluminum foil layer, a flame-retardant adhesive layer and a glass fiber layer from inside to outside.
Further, the reflecting layer is spirally wound outside the heat insulating layer.
Further, the direct-buried bracket comprises a sliding bracket and a guide bracket;
the sliding support comprises a hoop I, a support, a sliding plate and a bottom plate, the bottom plate is welded on the inner side of the outer sleeve, the support is welded at the bottom of the hoop I, and the sliding plate is welded at the bottom of the support and is in sliding fit with the bottom plate;
the guide bracket comprises a clamp II and bracket round steel, the bracket round steel is provided with at least two, the inner ends of the bracket round steel are welded on the outer side of the clamp II, and the outer end of the bracket round steel is in sliding fit with the inner side of the outer sleeve.
Furthermore, the direct-buried support also comprises a fixed support, the fixed support is a conical structure, the large opening end of the fixed support is welded with the inner side of the outer sleeve, a heat-insulating layer is arranged on the outer side of the welding position, and the small opening end of the fixed support is welded with the outer side of the working pipe.
Further, the included angle between the generatrix of the fixed support and the axis of the fixed support is 30 degrees.
The utility model has the following beneficial effects:
1. compared with the traditional joint coating structure, the utility model can effectively reduce the number of welding seams at the joint coating, thereby improving the quality and the construction efficiency of the joint coating and reducing the welding operation amount and the construction cost.
2. The composite heat-insulating layer can improve the heat-insulating capacity and reduce the heat loss.
3. The direct-buried support has various structural forms, can determine specific types according to pipe diameters and construction modes, ensures the alignment of the inner pipe and the outer pipe, and reduces construction difficulty and cost.
Drawings
FIG. 1 is a schematic illustration of piping assembly installation for conventional patching construction in the prior art;
FIG. 2 is a schematic illustration of the present invention in the installation of a working tube set pair;
FIG. 3 is a schematic view of the assembly of the outer sleeve of the present invention;
FIG. 4 is a schematic view of the mounting of the sliding bracket of the present invention;
FIG. 5 is a schematic cross-sectional view of a sliding support according to the present invention;
FIG. 6 is a schematic view of the mounting of the guide bracket of the present invention;
FIG. 7 is a schematic cross-sectional view of a guide bracket according to the present invention;
FIG. 8 is a schematic view of the mounting bracket of the present invention;
FIG. 9 is a schematic view of the heat-insulating structure of the present invention;
FIG. 10 is a schematic cross-sectional view of the heat retention of the present invention;
FIG. 11 is a structural view of a reflection layer in the present invention.
Detailed Description
The utility model is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in figure 1, a power plant newly builds a DN600 steam pipeline, the whole field is 18km, wherein 15km is laid in a direct-buried way. The specification of the working pipe of the direct-buried prefabricated pipeline is phi 630 multiplied by 10, the material is 20 steel, and the specification of the outer sleeve is phi 1220 multiplied by 10, and the material is Q235B. Taking a standard segment as an example, the first pipe segment 701 and the eighth pipe segment 708 of the outer sleeve have a length of 1.5m, the second pipe segment 702 has a length of 2m, the third pipe segment 703, the fourth pipe segment 704, the fifth pipe segment 705, the sixth pipe segment 706 and the seventh pipe segment 707 have a length of 12m, and the total length of the standard segment is 65 m. The exposed part of the pipe section at the welding position of the working pipe adopts a split blanking joint coating construction mode, so joint coating welding seams on the outer sleeve pipe are respectively as follows: h12 ', h23 ', h34 ', h45 ', h56 ', h67 ' and h78 '.
h 12' weld length is: 3.14 × 1220 × 2+3 × Δ l =3.14 × 1220 × 2+3 × 600mm =9462 mm; the total length of the repaired seam on the outer sleeve is 9462X 7mm =66234 mm.
As shown in fig. 2 to 11, the steel sleeve steam direct buried pipeline in the utility model comprises a working pipe 2, an outer sleeve 6, a direct buried bracket 1 and a compensator 9.
The working pipe 2 is arranged inside the outer casing 6, and the working pipe 2 comprises a plurality of working pipe sections provided with composite heat insulation layers, namely a first working pipe section 201, a second working pipe section 202, a third working pipe section 203, a fourth working pipe section 204, a fifth working pipe section 205, a sixth working pipe section 206, a seventh working pipe section 207 and an eighth working pipe section 208.
The inner pipe of the compensator 9 is connected to the second working pipe section 202, the first working pipe section 201 is used as a first section on the left, all the working pipe sections are sequentially assembled, installed and welded from left to right, then ray nondestructive testing is carried out on welding seams H12, H23, H34, H45, H56, H67 and H78, heat preservation and joint coating construction is carried out on exposed parts of pipe head joints of all the sections after the welding seams are qualified, and a composite heat preservation layer is arranged.
In order to improve the fireproof capacity of the repaired mouth, after the construction of the heat-preservation repaired mouth is completed, a fireproof layer is wrapped outside the composite heat-preservation layer at each heat-preservation repaired mouth, and the fireproof layers are firmly tied up through steel wires.
The outer sleeve 6 comprises a plurality of steel sleeve sections and two split type gap filling sections, the steel sleeve sections are respectively a first steel sleeve section 601, a second steel sleeve section 602, a third steel sleeve section 603, a fourth steel sleeve section 604, a fifth steel sleeve section 605, a sixth steel sleeve section 606, a seventh steel sleeve section 607, an eighth steel sleeve section 608 and a ninth steel sleeve section 609, and the eighth steel sleeve section 608 is a compensation section. The first steel sleeve section 601 is aligned with the first working pipe section 201 in the center, the first steel sleeve section 601 is connected with the second steel sleeve section 602 and the eighth steel sleeve section 608 is connected with the ninth steel sleeve section 609 in a split blanking and opening repairing construction mode, namely, a split opening repairing section 610 is welded on each steel sleeve section to form welding seams h12 and h89 respectively, temporary lifting lugs are welded on the rest steel sleeve sections, a pipe dragging and opening repairing construction connection mode is adopted, namely, group pair installation welding is carried out after equipment such as an electric hoist is dragged from right to left in sequence, welding seams h23, h34, h45, h56 and h67 are formed, and then ray nondestructive detection is carried out on the welding seams h12, h23, h34, h45, h56, h67, h78 and h 89.
The split-type repaired mouth section 610 comprises three arc-shaped pieces which are uniformly divided in the circumferential direction and are connected in a welding mode in the circumferential direction.
In an alternative embodiment, as shown in fig. 9 to 11, the composite insulation layer comprises a plurality of insulation layers 3 and a reflective layer 4, and the reflective layer 4 is wrapped around each insulation layer 3 and bound by a binding tape.
The heat preservation layer 3 is divided into a plurality of layers when the thickness is more than 40mm, and the reflecting layer 4 is wrapped outside each soft heat preservation layer 3.
In an alternative embodiment, as shown in fig. 4 to 7, the direct burial bracket 1 includes a sliding bracket 101 and a guide bracket 102. Specifically, the sliding bracket 101 includes a clip I103a, a bracket 110, a slide plate 107, and a bottom plate 106, the bottom plate 106 is welded to the inner side of the outer sleeve 6, the bracket 110 is welded to the bottom of the clip I103a, and the slide plate 107 is welded to the bottom of the bracket 110 and is slidably engaged with the bottom plate 106.
The guide bracket 102 comprises a clamp II103b and two bracket round bars 108, the inner ends of the bracket round bars 108 are welded on the outer side of the clamp II103b, and the outer ends of the bracket round bars are in sliding fit with the inner side of the outer sleeve 6. The sliding bracket 101 and the guide bracket 102 are mounted centrally within the third 603, fourth 604, fifth 605, sixth 606 and seventh 607 steel casing sections being pulled along, supporting the respective work pipe sections. In order to protect the working pipe 2 and prevent scratches, the inner sides of the clamp I103a and the clamp II103b are also provided with a soft spacer 104. Clamp I103a and clamp II103b all include two half-circle ring shape hoop bodies, and the both ends are connected through bolt 105.
In an alternative embodiment, as shown in fig. 8, the direct burial bracket 1 further comprises a fixing bracket 109, the fixing bracket 109 is a conical structure, a large opening end of the fixing bracket 109 is welded with the inner side of the outer sleeve 6, an insulating layer 3 is arranged on the outer side of the welding position, and a small opening end of the fixing bracket is welded with the outer side of the working pipe 2. In this example, the fixed bracket 109 is mounted at the first work pipe section 201 and the eighth work pipe section 208 to form a support thereto.
In an alternative embodiment, the generatrix of the fixed support 109 is angled at 30 ° to its axis.
As shown in fig. 3, the weld joints of the outer sleeve 6 required to be repaired are: h12, h23, h34, h45, h56, h67, h7 and h 8.
The length of the welding seams h12 and h89 is 9462 mm; the length of the welds h23, h34, h45, h56, h67, h78 is 3.14 × 1220mm =3831 mm; the total length of the repaired mouth welding seam of the outer sleeve 6 is 9462 multiplied by 2+3831 multiplied by 6mm =41910mm, compared with the prior art, the total length of the welding seam is reduced by 36.7%, the construction efficiency is greatly improved, the construction cost is reduced, the construction period is shortened, and the remarkable economic benefit is achieved.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A steel sleeve steam direct-buried pipeline is characterized by comprising a working pipe (2), an outer sleeve (6), a direct-buried bracket (1) and a compensator (9);
the working pipe (2) is arranged inside the outer sleeve (6), the working pipe (2) comprises a plurality of working pipe sections provided with composite heat-insulating layers, an inner pipe of the compensator (9) is connected to one of the working pipe sections, all the working pipe sections are sequentially welded and connected, and the exposed part of the pipe head joint is provided with the composite heat-insulating layer;
the outer sleeve (6) comprises a plurality of steel sleeve sections and two piece type opening repairing sections, one end of the outer pipe of the compensator (9) is connected with one steel sleeve section through one piece type opening repairing section in a welding mode, one end of one steel sleeve section is connected with the other steel sleeve section through the other piece type opening repairing section in a welding mode, and the other end of the outer pipe of the compensator (9) is connected with the other end of the outer pipe of the compensator in a welding mode through the other steel sleeve sections.
2. The steel sleeve steam direct-buried pipeline according to claim 1, wherein the split patch section comprises three arc-shaped pieces which are evenly divided in the circumferential direction and are welded in pairs in the circumferential direction.
3. A steel casing steam direct buried pipeline according to claim 1, characterized in that the joints of the sections of the working pipe (2) and the outer sections of the outer casing pipe (6) are provided with fire-proof layers outside the composite heat-insulating layers.
4. A steel casing steam buried pipeline according to claim 3, wherein the fire resistant layer is secured by steel wire ties.
5. The steel sleeve steam direct buried pipeline according to the claim 1, characterized in that the composite insulation layer comprises a plurality of insulation layers (3) and a reflection layer (4), and the reflection layer (4) is wrapped outside each insulation layer (3) and is bound and fixed by a binding tape.
6. The steel sleeve steam direct buried pipeline according to claim 5, characterized in that the reflecting layer (4) comprises an aluminum foil layer (401), a flame retardant adhesive layer (402) and a glass fiber layer (403) in sequence from inside to outside.
7. A steel casing steam direct buried pipeline according to claim 5, characterized in that the reflecting layer (4) is spirally wound outside the insulating layer (3).
8. A steel casing steam buried pipeline according to claim 1, characterized in that the buried bracket (1) comprises a sliding bracket (101) and a guiding bracket (102);
the sliding support (101) comprises a clamp I (103 a), a support (110), a sliding plate (107) and a bottom plate (106), the bottom plate (106) is welded on the inner side of the outer sleeve (6), the support (110) is welded on the bottom of the clamp I (103 a), and the sliding plate (107) is welded on the bottom of the support (110) and is in sliding fit with the bottom plate (106);
guide bracket (102) include clamp II (103 b) and support round steel (108), support round steel (108) are provided with at least two, and its inner end welding is in the outside of clamp II (103 b), the outer end with the inboard sliding fit of outer tube (6).
9. The steel sleeve steam direct-buried pipeline as claimed in claim 8, characterized in that the direct-buried bracket (1) further comprises a fixing bracket (109), the fixing bracket (109) is a conical structure, the large-mouth end of the fixing bracket is welded with the inner side of the outer sleeve (6), an insulating layer (3) is arranged outside the welding position, and the small-mouth end of the fixing bracket is welded with the outer side of the working pipe (2).
10. A steel casing steam buried pipeline according to claim 9, characterized in that the generatrix of the fixed bracket (109) is at an angle of 30 ° to its axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122098304.4U CN215410857U (en) | 2021-09-01 | 2021-09-01 | Steel casing steam direct-buried pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122098304.4U CN215410857U (en) | 2021-09-01 | 2021-09-01 | Steel casing steam direct-buried pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215410857U true CN215410857U (en) | 2022-01-04 |
Family
ID=79665792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122098304.4U Active CN215410857U (en) | 2021-09-01 | 2021-09-01 | Steel casing steam direct-buried pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215410857U (en) |
-
2021
- 2021-09-01 CN CN202122098304.4U patent/CN215410857U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209943788U (en) | Steel wire mesh framework polyethylene composite pipe connecting structure | |
| CN207062988U (en) | A kind of pipe gallery | |
| CN107763356A (en) | A kind of utilidor joint design and its construction method | |
| CN215410857U (en) | Steel casing steam direct-buried pipeline | |
| CN109058635A (en) | Prefabricated thermal insulation bilayer bend pipe and preparation method thereof | |
| CN108018871A (en) | A kind of pipeline section connector suitable for the compound pipe gallery of bamboo | |
| CN107763372A (en) | Heavy in section circular pipe insulation and the construction method of installation of outer casing | |
| CN204922351U (en) | Steel bushing steel direct -burried steam insulating tube compensator | |
| CN216408186U (en) | Prefabricated polyurethane heat-preservation fixed heat-insulation pipe bracket | |
| CN203857199U (en) | Direct-burial prefabricated composite thermal insulation steam pipe with built-in rolling type inner guide steel tube | |
| CN113700987A (en) | Manufacturing and mounting method of direct-buried prefabricated steam insulation pipe | |
| CN110594534B (en) | Insulating internal fixing support of prefabricated direct-buried steam heat-insulating pipe | |
| CN212455972U (en) | Urban gas buried pipeline protection device | |
| CN211738286U (en) | Double-layer tensile PE pipe assembly | |
| CN211649434U (en) | Internal stop type rubber ring butt joint structure of winding pipe | |
| CN201306580Y (en) | Steel outer protective polyurethane prefabricated insulating tube | |
| CN210830976U (en) | Integrated heat tracing device with good use effect and convenience in installation | |
| CN107166102A (en) | One kind be used for it is through walls, go out ground gas sleeve pipe and preparation method thereof | |
| CN114110297A (en) | Plastic-sheathed steel steam direct-buried prefabricated pipeline and construction joint coating method | |
| CN217634594U (en) | Non-corrosion double-protection direct-buried steam composite heat-insulation pipe | |
| CN213598750U (en) | Steel faucet prestressed steel cylinder concrete thermal insulation pipe | |
| CN206468913U (en) | A kind of indoor fuel gas wall pipe with pillar | |
| CN205674484U (en) | Corrosion resistant lining tube continuous construction equipment | |
| CN214425441U (en) | Assembled built on stilts insulating tube | |
| CN203857201U (en) | Direct-burial prefabricated thermal insulation steam pipe with rolling type inner guide support |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |