CN115199866B - Soft prefabricated overhead steam heat-insulating pipe and manufacturing method and joint coating method thereof - Google Patents
Soft prefabricated overhead steam heat-insulating pipe and manufacturing method and joint coating method thereof Download PDFInfo
- Publication number
- CN115199866B CN115199866B CN202210873098.6A CN202210873098A CN115199866B CN 115199866 B CN115199866 B CN 115199866B CN 202210873098 A CN202210873098 A CN 202210873098A CN 115199866 B CN115199866 B CN 115199866B
- Authority
- CN
- China
- Prior art keywords
- support
- heat insulation
- layer
- pipe
- steel pipe
- 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
- 238000000576 coating method Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000009413 insulation Methods 0.000 claims abstract description 143
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 102
- 239000010959 steel Substances 0.000 claims abstract description 102
- 238000005096 rolling process Methods 0.000 claims abstract description 65
- 229920002635 polyurethane Polymers 0.000 claims abstract description 23
- 239000004814 polyurethane Substances 0.000 claims abstract description 23
- 238000010276 construction Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 7
- 238000005187 foaming Methods 0.000 claims description 31
- 239000011248 coating agent Substances 0.000 claims description 20
- 238000004321 preservation Methods 0.000 claims description 17
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 10
- 239000011491 glass wool Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 7
- 239000011888 foil Substances 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 239000010431 corundum Substances 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 4
- 239000010445 mica Substances 0.000 claims description 4
- 229910052618 mica group Inorganic materials 0.000 claims description 4
- 229910052845 zircon Inorganic materials 0.000 claims description 4
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000009417 prefabrication Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 239000011265 semifinished product Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000009785 tube rolling Methods 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000002360 preparation method Methods 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
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
-
- 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
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/021—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves
- F16L59/024—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves composed of two half sleeves
-
- 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
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The invention relates to a soft prefabricated overhead steam heat-insulating pipe, a manufacturing method thereof and a mouth repairing method. The rolling heat insulation support comprises a working steel pipe and a rolling heat insulation support, wherein a heat insulation layer and a heat insulation sleeve are sequentially arranged on the outer surface of the working steel pipe, the rolling heat insulation support comprises a support hoop, a support hard heat insulation layer and a support soft heat insulation layer, the support hoop wraps the support hard heat insulation layer on the working steel pipe, and the support soft heat insulation layer is arranged between the support hard heat insulation layer and the working steel pipe. The soft prefabricated overhead steam heat-insulating pipe, the manufacturing method and the joint coating method thereof adopt factory prefabrication, a heat-insulating process is guaranteed, and a heat-insulating effect is more reliable; the site installation is simple, safe, quick, short in construction period and more environment-friendly; the heat insulation sleeve formed by polyurethane and double-layer spiral pipes has good compression resistance and water resistance, is more attractive and has longer service life.
Description
Technical Field
The invention relates to the technical field of overhead heat-insulating pipes, in particular to a soft prefabricated overhead steam heat-insulating pipe, a manufacturing method thereof and a mouth repairing method thereof.
Background
The overhead heat-insulating pipe is an indispensable part in the heat supply network pipeline, but the overhead pipeline is generally of a soft heat-insulating structure, and can not be stored and transported even after being prefabricated in a factory, so that the overhead heat-insulating pipe can only be manufactured on site, and the following defects are caused in the field manufacturing:
1. the overhead pipe is generally supported on a high support, so that the construction is unsafe, the heat preservation construction process is poor, the construction period is long, and the site pollution is large;
2. the outer protection of the insulating layer of the overhead line adopts the spiral lap joint protection of the color steel plates, after the pipeline is heated and expanded, the color steel plates at the places with large displacement have gaps to cause the exposure of heat preservation cotton, and the color steel plates are unpressurized, have low bearing capacity and deform when being subjected to external force, squeeze the insulating layer, and influence the heat preservation effect and the rainproof effect.
Disclosure of Invention
The invention aims to solve the problems and provides a soft prefabricated overhead steam heat-insulating pipe, a manufacturing method and a joint repairing method thereof, so that the prefabrication of the soft overhead pipe is realized, the process quality is ensured, the construction and installation are convenient, and the construction period is short.
In order to solve the technical problems, the invention provides a soft prefabricated overhead steam heat-insulating pipe, which comprises a working steel pipe and a rolling heat-insulating support, wherein a heat-insulating layer and a heat-insulating sleeve are sequentially arranged along the outer surface of the working steel pipe, the rolling heat-insulating support comprises a support hoop, a support hard heat-insulating layer and a support soft heat-insulating layer, the support hoop wraps the support hard heat-insulating layer on the working steel pipe, and the support soft heat-insulating layer is arranged between the support hard heat-insulating layer and the working steel pipe.
In one embodiment of the invention, the rolling heat insulation support further comprises support legs, support rollers, support bolts and support reinforcing plates, wherein the support hoops wrap the support hard heat insulation layer on the working steel pipes through the support bolts, the support legs are uniformly distributed in four along the circumferential direction of the support hoops, the support rollers are in rolling contact with the heat insulation sleeve, the support rollers are rotatably connected to the outer ends of the support legs, and the support reinforcing plates are arranged between the support legs and the support hoops.
In one embodiment of the invention, the rolling heat insulation support is arranged at the center or one end of the working steel pipe, when the rolling heat insulation support is arranged at one end of the working steel pipe, the other end of the working steel pipe is also provided with the rolling heat insulation auxiliary support, the rolling heat insulation auxiliary support comprises an auxiliary support hard heat insulation layer, an auxiliary support hoop, an auxiliary support soft heat insulation layer, auxiliary support supporting legs, auxiliary support rollers, auxiliary support bolts and an auxiliary support reinforcing plate, the auxiliary support hoop wraps the auxiliary support hard heat insulation layer on the working steel pipe, the auxiliary support soft heat insulation layer is arranged between the auxiliary support hard heat insulation layer and the working steel pipe, the two auxiliary support supporting legs are symmetrically distributed at the upper ends of the auxiliary support hoops, the auxiliary support rollers are rotatably connected to the outer ends of the auxiliary support supporting legs, the auxiliary support rollers are in rolling contact with the heat insulation sleeve, the auxiliary support reinforcing plate is arranged between the auxiliary support supporting legs and the auxiliary support hoops, and the width of the auxiliary support hoop is half of the width of the support hoop, and the width of the auxiliary support heat insulation layer is half of the width of the support hoop.
In one embodiment of the invention, the bracket hard heat insulation layer and the auxiliary bracket hard heat insulation layer are formed by stirring, pressing and sintering zircon sand, mica, corundum sand and alumina fine powder according to a proportion.
In one embodiment of the invention, the heat preservation layer comprises a filament fiber blanket layer, a high-temperature glass wool layer and an aluminum foil reflecting layer which are sequentially arranged along the outer surface of the working steel pipe.
In one embodiment of the invention, the heat insulation sleeve comprises an inner spiral pipe, a polyurethane foaming layer and an outer spiral pipe which are sequentially arranged along the outer surface of the heat insulation layer, and a straight slit steel pipe is further arranged outside the inner spiral pipe corresponding to the rolling heat insulation support.
In one embodiment of the invention, an outer support is arranged on the outer side of a heat insulation sleeve provided with a straight-seam steel pipe, the outer support comprises a semicircular anchor ear, an annular anchor ear, a U-shaped support, a rubber pad and an outer support bolt, the annular anchor ear is arranged on the lower half part of the heat insulation sleeve, the annular anchor ear is arranged on the upper half part of the heat insulation sleeve, the semicircular anchor ear and the annular anchor ear are connected through the outer support bolt, the U-shaped support is connected to the bottom of the circular anchor ear for supporting, and the semicircular anchor ear and the annular anchor ear are lined with the rubber pad.
The invention also provides a method for manufacturing the soft prefabricated overhead steam heat-preserving pipe, which comprises the following steps:
s1: a rolling heat insulation support and/or a rolling heat insulation auxiliary support are/is arranged on the working steel pipe;
s2: a soft heat-insulating layer is arranged on the working steel pipe; firstly, arranging an outer filament fiber blanket layer on a working steel pipe, arranging a high-temperature glass wool layer outside the outer filament fiber blanket layer, spirally winding an aluminum foil reflecting layer outside each layer of heat-insulating cotton according to same-layer staggered seams and different-layer laminated seams during installation, and bundling by adopting a stainless steel belt;
s3: rolling an inner spiral tube and an outer spiral tube by a tube rolling machine, wherein the inner spiral tube is made of color steel coils with the wall thickness of 0.8-1mm, the outer diameter of the inner spiral tube is the sum of the outer diameter of a working steel tube, the thickness of a heat preservation layer and an air layer with the thickness of 10mm, the outer spiral tube is made of color steel coils with the wall thickness of 0.5-0.8mm, the outer diameter of the outer spiral tube is 60mm larger than the outer diameter of the inner spiral tube, and straight-slit steel tubes are arranged outside the inner spiral tubes corresponding to the rolling heat insulation support; sleeving the inner spiral tube into the outer spiral tube, filling the annular seam of the two spiral tubes with round foam bars and wood blocks, forming a foaming material injection hole and an exhaust hole at the top of the outer spiral tube, foaming polyurethane on a foaming platform, and forming a foaming polyurethane foam layer with compressive strength of 0.02-0.025MPa;
s4: sleeving the formed heat insulation sleeve on a working steel pipe with a heat insulation layer and a rolling heat insulation bracket through a pipe penetrating platform;
s5: an outer bracket is arranged on the outer side of the heat insulation sleeve with the straight-seam steel pipe.
In one embodiment of the invention, the inner diameter of the straight seam steel pipe is 5mm larger than the outer diameter of the inner spiral pipe, and the wall thickness of the straight seam steel pipe is 6-12mm.
The invention also provides a joint coating method of the soft prefabricated overhead steam heat-insulating pipe, which comprises the following steps:
s1: after the butt joint of the working steel pipes is finished, performing heat preservation layer construction, installing an inner layer joint coating spiral pipe according to joint staggering and different-layer pressing joints in joint coating construction, wherein the diameter of the inner layer joint coating spiral pipe is 30mm larger than that of the inner layer spiral pipe, symmetrically cutting the inner layer joint coating spiral pipe into a half form, installing the inner layer joint coating spiral pipe on the outer surface of the inner layer spiral pipe, and connecting the half parts by rivets;
s2: the prefabricated polyurethane foaming layer is in a half shape, and the prefabricated polyurethane foaming layer is assembled on the outer surface of the inner-layer joint coating spiral pipe;
s3: symmetrically cutting the outer-layer joint coating spiral pipe into a half form, assembling the half form on the outer surface of the prefabricated polyurethane foaming layer, and connecting the half parts by adopting rivets.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the soft prefabricated overhead steam heat-insulating pipe, the manufacturing method and the joint coating method thereof adopt factory prefabrication, a heat-insulating process is guaranteed, and a heat-insulating effect is more reliable; the site installation is simple, safe, quick, short in construction period and more environment-friendly; the heat insulation sleeve formed by polyurethane and double-layer spiral pipes has good compression resistance and water resistance, is more attractive and has longer service life.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
Fig. 1 is a schematic perspective view of a single-bracket prefabricated heat-insulating pipe.
Fig. 2 is a schematic diagram of a prefabricated thermal insulation three-dimensional structure of a double bracket.
Fig. 3 is a schematic perspective view of a heat insulation sleeve.
Fig. 4 is a partial enlarged view of fig. 3.
Fig. 5 is a schematic perspective view of a rolling heat insulation support.
Fig. 6 is a schematic perspective view of a rolling heat insulation auxiliary support.
Fig. 7 is a schematic perspective view of an outer bracket.
Fig. 8 is a plan view of the joint coating.
Fig. 9 is a schematic diagram of a foam three-dimensional structure of the prefabricated polyurethane at the joint.
Fig. 10 is a schematic view of a three-dimensional structure after connection installation.
Description of the specification reference numerals: 1. working steel pipes; 2. a heat preservation layer; 3. a heat insulating sleeve; 301. an inner spiral tube; 302. a polyurethane foaming layer; 303. an outer spiral tube; 304. straight seam steel pipe; 4. a rolling heat insulation bracket; 401. a bracket hoop; 402. a rigid heat insulation layer of the bracket; 403. a soft heat insulation layer of the bracket; 404. a support leg; 405. a support roller; 406. a bracket bolt; 407. a bracket reinforcing plate; 5. an outer bracket; 501. an annular hoop; 502. an outer bracket bolt; 503. a semicircular anchor ear; 504. a rubber pad; 505. a U-shaped support; 6. a rolling heat insulation auxiliary bracket; 601. auxiliary support hoops; 602. a rigid heat insulation layer of the auxiliary bracket; 603. an auxiliary support soft heat insulation layer; 604. auxiliary support legs; 605. auxiliary support rollers; 606. auxiliary bracket bolts; 607. an auxiliary bracket reinforcing plate; 7. an inner layer mouth-repairing spiral pipe; 8. prefabricating a polyurethane foaming layer; 9. an outer layer mouth-repairing spiral pipe; 10. and (5) a rivet.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Example 1
Referring to fig. 1 to 7, a soft prefabricated overhead steam heat insulation pipe comprises a working steel pipe 1 and a rolling heat insulation support 4, wherein a heat insulation layer 2 and a heat insulation sleeve 3 are sequentially arranged on the outer surface of the working steel pipe 1, the rolling heat insulation support 4 comprises a support hoop 401, a support hard heat insulation layer 402 and a support soft heat insulation layer 403, the support hoop 401 wraps the support hard heat insulation layer 402 on the working steel pipe 1, and the support soft heat insulation layer 403 is arranged between the support hard heat insulation layer 402 and the working steel pipe 1.
Specifically, the rolling heat insulation support 4 further comprises support legs 404, support rollers 405, support bolts 406 and support reinforcing plates 407, the support hoops 401 wrap the support hard heat insulation layer 402 on the working steel pipes 1 through the support bolts 406, the support legs 404 are evenly distributed in the circumferential direction of the support hoops 401, the support rollers 405 are rotationally connected to the outer ends of the support legs 404, the support rollers 405 are in rolling contact with the heat insulation sleeves 3, and the support reinforcing plates 407 are arranged between the support legs 404 and the support hoops 401.
Specifically, the rolling heat insulation support 4 is arranged at the center or one end of the working steel pipe 1, and when the rolling heat insulation support 4 is arranged at one end of the working steel pipe 1, the other end of the working steel pipe 1 is also provided with a rolling heat insulation auxiliary support 6. The center of the working steel pipe 1 specifically refers to the left and right 2m of the length center of the working steel pipe 1, one end of the working steel pipe 1 refers to the 0-4m positions of the two ends of the working steel pipe 1, and the length of the working steel pipe 1 is generally 12 m. The rolling heat insulation support 4 is installed on the working steel pipe 1 according to a pipeline span, when the working steel pipe 1 is provided with only one rolling heat insulation support 4, and the rolling heat insulation support 4 is arranged in the center of the working steel pipe 11 and is a single-support prefabricated heat insulation pipe, when the rolling heat insulation support 44 is installed at one end of the working pipe, the rolling heat insulation auxiliary support 6 is arranged at the other end of the working steel pipe 1 and is a double-support prefabricated heat insulation pipe, and the single-support prefabricated heat insulation pipe and the double-support prefabricated heat insulation pipe are arranged according to the pipeline buttress position combination.
FIG. 10 is a schematic illustration of a flexible prefabricated overhead vapor insulating tube comprising a plurality of end-to-end single-stent prefabricated insulating tubes and double-stent prefabricated insulating tubes arranged in combination according to actual pipeline buttress positions.
The rolling heat insulation auxiliary support 6 comprises an auxiliary support hard heat insulation layer 602, an auxiliary support hoop 601, an auxiliary support soft heat insulation layer 603, auxiliary support supporting legs 604, auxiliary support rollers 605, auxiliary support bolts 606 and an auxiliary support reinforcing plate 607, wherein the auxiliary support hoop 601 wraps the auxiliary support hard heat insulation layer 602 on a working steel pipe 1, the auxiliary support soft heat insulation layer 603 is arranged between the auxiliary support hard heat insulation layer 602 and the working steel pipe 1, the auxiliary support supporting legs 604 are symmetrically distributed at the upper ends of the auxiliary support hoops 601, the auxiliary support rollers 605 are rotationally connected to the outer ends of the auxiliary support supporting legs 604, and the auxiliary support rollers 605 are in rolling contact with the heat insulation sleeve 3. Because the rolling heat insulation auxiliary support 6 only bears the weight of the heat insulation sleeve 3, only two auxiliary support legs 604 are arranged, the auxiliary support reinforcing plate 607 is arranged between the auxiliary support legs 604 and the auxiliary support hoops 601, the width of the auxiliary support hoops 601 is half of the width of the support hoops 401, and the width of the auxiliary support hard heat insulation layer 602 is half of the width of the support hard heat insulation layer 402.
Specifically, the soft insulating layer 403 of the support and the soft insulating layer 603 of the auxiliary support are made of nano aerogel, the hard insulating layer 402 of the support and the hard insulating layer 602 of the auxiliary support are made of zirconium sintered products, and are formed by stirring, pressing and sintering zircon sand, mica, corundum sand and alumina fine powder according to a proportion, specifically, 7-12 parts of zircon sand, 5-8 parts of mica, 10-15 parts of corundum sand, 15-20 parts of alumina powder, 8-15 parts of floating beads and 25-30 parts of bauxite fine powder are poured into a stirrer to be dry-mixed, and then 10-15 parts of water is added to be fully stirred for 15-20 min; pouring the mixed raw materials into a mould, and pressing the raw materials by a press to prepare a semi-finished product; pushing the pressed semi-finished product into a drying room for drying until the moisture in the semi-finished product is basically volatilized; and (3) placing the dried product into a kiln, discharging the kiln after high-temperature firing, and cooling the finished product to obtain the product (refer to CN 112479686A for a specific manufacturing process as a zirconium hard heat insulation material and a preparation method thereof).
Specifically, the heat preservation layer 2 is a composite structure and comprises a filament fiber blanket layer, a high-temperature glass wool layer and an aluminum foil reflecting layer which are sequentially arranged along the outer surface of the working steel pipe 1. The filament fiber blanket layer has low heat conductivity coefficient and high temperature resistance, so the high-temperature glass wool layer is arranged on the inner layer, the same-layer staggered joint different-layer pressure joint is needed during heat preservation construction, the aluminum foil reflecting layer is spirally wound outside each layer of heat preservation cotton, and the strapping tape adopts a 304 stainless steel belt with the thickness of 0.2 mm.
Specifically, the heat insulation sleeve 3 comprises an inner spiral pipe 301, a polyurethane foaming layer 302 and an outer spiral pipe 303 which are sequentially arranged along the outer surface of the heat insulation layer 2, and a straight slit steel pipe 304 is further arranged at the outer surface of the inner spiral pipe 301 corresponding to the rolling heat insulation support 4. Because the compressive strength of the foamed polyurethane layer 302 is 0.02-0.025MPa, but the bracket roller 405 at the rolling heat insulation bracket 4 bears the weight of the working steel pipe 1, the rolling heat insulation bracket 4 and the heat preservation layer 2, the heat insulation sleeve contacted with the roller at the bottom of the rolling heat insulation bracket 4 is difficult to bear such large pressure, the straight slit steel pipe 304 is arranged to bear pressure, and the bracket position of the heat insulation sleeve 3 is ensured not to deform; in this embodiment, the inner diameter of the straight-slit steel pipe 304 is 5mm larger than the outer diameter of the inner spiral pipe 301, the wall thickness is generally 6-12mm calculated according to the diameter of the working pipe, the length is 1m, the rolling heat insulation support 4 is arranged at the middle position of 1m, and if the thermal displacement of the pipeline is longer, the length of the straight-slit steel pipe 304 can be properly increased.
Specifically, be provided with outer support 5 in the outside of the insulating tube 3 department that is equipped with straight seam steel pipe 304, outer support 5 includes annular staple bolt 501, outer support bolt 502, semi-circular staple bolt 503, rubber pad 504 and U type support 505, semi-circular staple bolt 503 locates insulating tube 3 lower half, annular staple bolt 501 locates insulating tube 3 upper half, semi-circular staple bolt 503, annular staple bolt 501 pass through outer support bolt 502 to be connected, U type support 505 connects in semi-circular staple bolt 503 bottom and plays the supporting role, in order to guarantee not destroy the surface film of outer spiral pipe 303, semi-circular staple bolt 503 and the equal inside lining of annular staple bolt 501 have rubber pad 504. In addition, the outer bracket 5 is exposed to the outside and thus needs to be galvanized.
Example 2
The embodiment provides a method for manufacturing a soft prefabricated overhead steam heat-preserving pipe, which comprises the following steps:
s1: a rolling heat insulation support 4 and/or a rolling heat insulation auxiliary support 6 are/is arranged on the working steel pipe 1;
s2: a soft heat preservation layer 2 is arranged on the working steel pipe 1; firstly, arranging an outer filament fiber blanket layer on a working steel pipe 1, arranging a high-temperature glass wool layer outside the outer filament fiber blanket layer, spirally winding an aluminum foil reflecting layer outside the high-temperature glass wool layer according to same-layer staggered joints and different-layer pressure joints during installation, and bundling by using a stainless steel belt;
s3: the inner spiral tube 301 and the outer spiral tube 303 are rolled out by a tube rolling machine, the inner spiral tube 301 is made of color steel coils with the wall thickness of 0.8-1mm, the outer diameter of the inner spiral tube 301 is the sum of the outer diameter of the working steel tube 1, the thickness of the heat preservation layer 2 which is twice that of the outer diameter of the working steel tube and an air layer (arranged between the heat preservation layer 2 and the heat insulation sleeve 3) with the thickness of 10mm, the outer spiral tube 303 is made of color steel coils with the wall thickness of 0.5-0.8mm, and the outer diameter of the outer spiral tube 303 is 60mm larger than that of the inner spiral tube 301; the inner spiral tube 301 is sleeved into the outer spiral tube 303, a straight seam steel tube 304 is arranged on the outer surface of the inner spiral tube 301 corresponding to the rolling heat insulation support 4, circular foam bars and wood blocks are used for filling the circular seams of the inner spiral tube 301 and the outer spiral tube 303, a foaming material injection hole and an air exhaust hole are formed in the top of the outer spiral tube 303, polyurethane foaming is carried out on a foaming platform, and the compressive strength of the foaming formed polyurethane foaming layer 302 is 0.02-0.025MPa; because the foaming can generate larger expansion pressure, an arc inner support die is also required to be arranged in the spiral tube 301 of the inner layer before foaming;
s4: sleeving a formed heat insulation sleeve 3 on a working steel pipe 1 with a heat preservation layer 2 and a rolling heat insulation bracket 4 through a pipe penetrating platform;
s5: an outer bracket 5 is provided outside the heat insulating sleeve 3 having the straight-line steel pipe 3043.
Specifically, the inner diameter of the straight-slit steel pipe 304 is 5mm larger than the outer diameter of the inner spiral pipe 301, and the wall thickness of the straight-slit steel pipe 304 is 6-12mm.
Example 3
As shown in fig. 8 to 10, the present embodiment provides a method for repairing a soft prefabricated overhead steam insulation pipe, which includes the following steps:
s1: after the butt joint of the working steel pipes 1 is finished, constructing an insulating layer 22, installing an inner layer joint coating spiral pipe 7 according to joint coating staggered joint and different-layer pressure joint in joint coating construction, after finishing the heat insulation construction, symmetrically cutting the inner layer joint coating spiral pipe 7 into a half form by using a diameter which is 30mm larger than that of the inner layer spiral pipe 301, installing a lower half first, installing an upper half, fully pressing the lower half by the upper half in a lap joint mode, fully pressing the outer diameter of the inner layer spiral pipe 301 at the two axial ends of the upper half and the lower half, installing the outer surface of the inner layer spiral pipe 301, and connecting the half parts by using rivets 10;
s2: taking the inconvenience of on-site foaming into consideration, prefabricating a polyurethane foaming layer 8 into a half shape in a factory, and assembling the prefabricating polyurethane foaming layer 8 on the outer surface of an inner layer joint coating spiral pipe 7;
s3: symmetrically cutting the outer-layer joint coating spiral pipe 9 into a half form, assembling the half form on the outer surface of the prefabricated polyurethane foaming layer 8, and connecting the half parts by adopting rivets 10.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.
Claims (4)
1. A method for manufacturing a soft prefabricated overhead steam heat-preserving pipe is characterized in that,
the soft prefabricated overhead steam heat-insulating pipe comprises a working steel pipe (1) and a rolling heat-insulating support (4), wherein a heat-insulating layer (2) and a heat-insulating sleeve (3) are sequentially arranged along the outer surface of the working steel pipe (1), the rolling heat-insulating support (4) comprises a support hoop (401), a support hard heat-insulating layer (402) and a support soft heat-insulating layer (403), the support hoop (401) wraps the support hard heat-insulating layer (402) on the working steel pipe (1), and the support soft heat-insulating layer (403) is arranged between the support hard heat-insulating layer (402) and the working steel pipe (1);
the rolling heat insulation support (4) further comprises support supporting legs (404), support rollers (405), support bolts (406) and support reinforcing plates (407), the support hoops (401) wrap the support hard heat insulation layer (402) on the working steel pipes (1) through the support bolts (406), the four support supporting legs (404) are uniformly distributed along the circumferential direction of the support hoops (401), the support rollers (405) are rotationally connected to the outer ends of the support supporting legs (404), the support rollers (405) are in rolling contact with the heat insulation sleeves (3), and the support reinforcing plates (407) are arranged between the support supporting legs (404) and the support hoops (401);
the rolling heat insulation support (4) is arranged at the center or one end of the working steel pipe (1), when the rolling heat insulation support (4) is arranged at one end of the working steel pipe (1), the other end of the working steel pipe (1) is also provided with the rolling heat insulation auxiliary support (6), the rolling heat insulation auxiliary support (6) comprises an auxiliary support hard heat insulation layer (602), an auxiliary support hoop (601), an auxiliary support soft heat insulation layer (603), auxiliary support legs (604), auxiliary support rollers (605), auxiliary support bolts (606) and an auxiliary support reinforcing plate (607), the auxiliary support hoop (601) wraps the auxiliary support hard heat insulation layer (602) between the auxiliary support hard heat insulation layer (602) and the working steel pipe (1), the two auxiliary support legs (604) are symmetrically distributed at the upper end of the auxiliary support hoop (601), the auxiliary support rollers (605) are rotationally connected to the outer ends of the auxiliary support legs (604), the auxiliary support rollers (605) are in contact with the heat insulation sleeve (3), the auxiliary support hoops (604) are arranged between the auxiliary support hoops (601) and the auxiliary support legs (601) in half width, the width of the auxiliary support rigid heat insulation layer (602) is half of the width of the support rigid heat insulation layer (402);
the heat insulation sleeve (3) comprises an inner spiral pipe (301), a polyurethane foaming layer (302) and an outer spiral pipe (303) which are sequentially arranged along the outer surface of the heat insulation layer (2), and a straight slit steel pipe (304) is further arranged at the outer surface of the inner spiral pipe (301) corresponding to the rolling heat insulation support (4);
the outer side of a heat insulation sleeve (3) provided with a straight-seam steel pipe (304) is provided with an outer support (5), the outer support (5) comprises an annular anchor ear (501), an outer support bolt (502), a semicircular anchor ear (503), a rubber pad (504) and a U-shaped support (505), the semicircular anchor ear (503) is arranged at the lower half part of the heat insulation sleeve (3), the annular anchor ear (501) is arranged at the upper half part of the heat insulation sleeve (3), the semicircular anchor ear (503) and the annular anchor ear (501) are connected through the outer support bolt (502), the U-shaped support (505) is connected to the bottom of the semicircular anchor ear (503), and the semicircular anchor ear (503) and the annular anchor ear (501) are both provided with the rubber pad (504);
the manufacturing method comprises the following steps:
s1: a rolling heat insulation support (4) and/or a rolling heat insulation auxiliary support (6) are/is arranged on the working steel pipe (1); the rolling heat insulation support (4) is arranged on the working steel pipe (1) according to a pipeline span, when only one rolling heat insulation support (4) is arranged on the working steel pipe (1), the rolling heat insulation support (4) is arranged in the center of the working steel pipe (11) to form a single-support prefabricated heat insulation pipe, when the rolling heat insulation support (44) is arranged at one end of the working steel pipe, the other end of the working steel pipe (1) is provided with a rolling heat insulation auxiliary support (6) to form a double-support prefabricated heat insulation pipe, and the single-support prefabricated heat insulation pipe and the double-support prefabricated heat insulation pipe are arranged in a combined mode according to the position of a pipeline buttress;
s2: a soft heat preservation layer (2) is arranged on the working steel pipe (1); firstly, arranging an outer filament fiber blanket layer on a working steel pipe (1), arranging a high-temperature glass wool layer outside the outer filament fiber blanket layer, spirally winding an aluminum foil reflecting layer outside the high-temperature glass wool layer according to same-layer staggered seams and different-layer laminated seams during installation, and bundling by using a stainless steel belt;
s3: an inner spiral pipe (301) and an outer spiral pipe (303) are rolled out by a pipe rolling machine, the inner spiral pipe (301) is made of color steel coils with the wall thickness of 0.8-1mm, the outer diameter of the inner spiral pipe (301) is the sum of the outer diameter of a working steel pipe (1), the thickness of a heat preservation layer (2) which is twice that of the inner spiral pipe and an air layer which is 10mm, the outer spiral pipe (303) is made of color steel coils with the wall thickness of 0.5-0.8mm, and the outer diameter of the outer spiral pipe (303) is 60mm larger than that of the inner spiral pipe (301); the inner spiral tube (301) is sleeved into the outer spiral tube (303), a straight-slit steel tube (304) is arranged on the outer surface of the inner spiral tube (301) corresponding to the rolling heat insulation support (4), circular seams of the inner spiral tube (301) and the outer spiral tube (303) are filled with round foam bars and wood blocks, a foaming material injection hole and an exhaust hole are formed in the top of the outer spiral tube (303), polyurethane foaming is carried out on a foaming platform, and the compressive strength of a foaming formed polyurethane foaming layer (302) is 0.02-0.025MPa;
s4: sleeving a formed heat insulation sleeve (3) on a working steel pipe (1) with a heat insulation layer (2) and a rolling heat insulation bracket (4) through a pipe penetrating platform;
s5: an outer bracket (5) is arranged at the outer side of the heat insulation sleeve (3) with the straight-seam steel pipe (304);
further comprises:
s61: after the butt joint of the working steel pipes (1) is finished, constructing an insulating layer (2), installing an inner layer joint coating spiral pipe (7) according to joint staggering and different-layer pressure joints in joint coating construction, after finishing the heat insulation construction, wherein the diameter of the inner layer joint coating spiral pipe (7) is 30mm larger than that of an inner layer spiral pipe (301), symmetrically cutting the inner layer joint coating spiral pipe (7) into a half form, installing the half form on the outer surface of the inner layer spiral pipe (301), and connecting the half form by adopting rivets (10);
s62: the prefabricated polyurethane foaming layer (8) is in a half shape, and the prefabricated polyurethane foaming layer (8) is assembled on the outer surface of the inner-layer joint coating spiral pipe (7);
s63: symmetrically cutting the outer-layer joint coating spiral pipe (9) into a half form, assembling the half form on the outer surface of the prefabricated polyurethane foaming layer (8), and connecting the half parts by adopting rivets (10).
2. The manufacturing method according to claim 1, wherein the bracket hard heat insulation layer (402) and the auxiliary bracket hard heat insulation layer (602) are formed by mixing, pressing and sintering zircon sand, mica, corundum sand and alumina fine powder according to proportion.
3. The manufacturing method according to claim 1, wherein the heat-insulating layer (2) comprises a filament fiber blanket layer, a high-temperature glass wool layer and an aluminum foil reflecting layer which are sequentially arranged along the outer surface of the working steel pipe (1).
4. The manufacturing method according to claim 1, characterized in that the inner diameter of the straight slit steel pipe (304) is 5mm larger than the outer diameter of the inner spiral pipe (301), and the wall thickness of the straight slit steel pipe (304) is 6-12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210873098.6A CN115199866B (en) | 2022-07-21 | 2022-07-21 | Soft prefabricated overhead steam heat-insulating pipe and manufacturing method and joint coating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210873098.6A CN115199866B (en) | 2022-07-21 | 2022-07-21 | Soft prefabricated overhead steam heat-insulating pipe and manufacturing method and joint coating method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115199866A CN115199866A (en) | 2022-10-18 |
| CN115199866B true CN115199866B (en) | 2024-03-22 |
Family
ID=83583669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210873098.6A Active CN115199866B (en) | 2022-07-21 | 2022-07-21 | Soft prefabricated overhead steam heat-insulating pipe and manufacturing method and joint coating method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115199866B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912763A (en) * | 2014-04-18 | 2014-07-09 | 辽宁久大管业有限公司 | Reflection heat insulation based straightly-buried prefabricated heat-insulating steam tube with internal guide supports and production method of reflection heat insulation based straightly-buried prefabricated heat-insulating steam tube |
| CN110848509A (en) * | 2019-12-13 | 2020-02-28 | 北京京诚科林环保科技有限公司 | Pipeline insulation structure |
| CN211624604U (en) * | 2020-01-19 | 2020-10-02 | 江苏天润管业有限公司 | Energy-saving prefabricated overhead composite heat-insulating pipe and pipe bracket thereof |
| CN213541543U (en) * | 2020-11-02 | 2021-06-25 | 江苏龙英管道新材料有限公司 | Heat supply network steam internal sliding heat insulation pipe support |
| CN214744198U (en) * | 2021-04-29 | 2021-11-16 | 江苏明江机械制造有限公司 | Soft prefabricated built on stilts steam insulating tube |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022784B (en) * | 2019-12-20 | 2021-03-09 | 信达科创（唐山）石油设备有限公司 | Ultra-long heat-insulating pipeline and processing method thereof |
-
2022
- 2022-07-21 CN CN202210873098.6A patent/CN115199866B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912763A (en) * | 2014-04-18 | 2014-07-09 | 辽宁久大管业有限公司 | Reflection heat insulation based straightly-buried prefabricated heat-insulating steam tube with internal guide supports and production method of reflection heat insulation based straightly-buried prefabricated heat-insulating steam tube |
| CN110848509A (en) * | 2019-12-13 | 2020-02-28 | 北京京诚科林环保科技有限公司 | Pipeline insulation structure |
| CN211624604U (en) * | 2020-01-19 | 2020-10-02 | 江苏天润管业有限公司 | Energy-saving prefabricated overhead composite heat-insulating pipe and pipe bracket thereof |
| CN213541543U (en) * | 2020-11-02 | 2021-06-25 | 江苏龙英管道新材料有限公司 | Heat supply network steam internal sliding heat insulation pipe support |
| CN214744198U (en) * | 2021-04-29 | 2021-11-16 | 江苏明江机械制造有限公司 | Soft prefabricated built on stilts steam insulating tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115199866A (en) | 2022-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110469748B (en) | Prefabricated overhead low-energy-consumption steam pipe network long-distance conveying system | |
| CN103968190A (en) | Prefabricated overhead heat insulation pipe | |
| CN206206814U (en) | A kind of prefabricated built on stilts composite thermal-insulating pipe | |
| CN115199866B (en) | Soft prefabricated overhead steam heat-insulating pipe and manufacturing method and joint coating method thereof | |
| CN103383053B (en) | The insulating structure part of pipeline | |
| CN210800458U (en) | Flexible joint for prefabricated overhead heat-insulation pipe | |
| CN114542807B (en) | Soft and hard combined prefabricated steam overhead heat insulation pipe with isolation layer and filling layer | |
| US2209547A (en) | Insulated pipe | |
| CN105065854B (en) | A kind of detachable heat-insulation shell | |
| CN220016592U (en) | Novel prefabricated heat preservation pipe | |
| CN103727359A (en) | Pipeline heat insulation construction method and pipeline heat insulation device of multi-setting foam glass material | |
| CN214744196U (en) | Soft and hard combined type heat preservation structure of overhead steam pipeline | |
| CN216408186U (en) | Prefabricated polyurethane heat-preservation fixed heat-insulation pipe bracket | |
| CN116066634A (en) | Detachable prefabricated heat preservation pipe | |
| CN210800465U (en) | Fixed pipe bracket for prefabricated finished product heat-insulating pipe | |
| CN110594532A (en) | Composite heat-insulation prefabricated overhead steam heat-insulation pipe and processing technology thereof | |
| CN110375154B (en) | Fixed pipe bracket for prefabricated finished heat preservation pipe | |
| JP2659916B2 (en) | Fireproof double-layer pipe joint, manufacturing method thereof, and fireproof double-layer pipe joint structure using the joint | |
| CN220396791U (en) | Steam heat-insulating pipe with prefabricated overhead heat-insulating composite heat-insulating structure | |
| CN220016387U (en) | Expansion joint structure for prefabricated heat preservation pipe | |
| WO2018056862A1 (en) | Joint locking technology of heat-insulating material | |
| RU2669218C1 (en) | Heat hydro insulation pipeline products for high-temperature thermal networks, heat and technological pipelines and the method of its manufacture | |
| CN117489917A (en) | Prefabricated overhead steam pipe network with external sliding self-compensating structure of heat preservation pipe and heat preservation pipe manufacturing method | |
| CN117386896B (en) | Environment-friendly prefabricated heat-insulating pipeline based on foaming hardening in sleeve and preparation method thereof | |
| CN114857410A (en) | Oval-like composite heat insulation structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |