CN222277724U - A ductile iron prefabricated insulation pipe with crack resistance - Google Patents
A ductile iron prefabricated insulation pipe with crack resistance Download PDFInfo
- Publication number
- CN222277724U CN222277724U CN202421218114.9U CN202421218114U CN222277724U CN 222277724 U CN222277724 U CN 222277724U CN 202421218114 U CN202421218114 U CN 202421218114U CN 222277724 U CN222277724 U CN 222277724U
- Authority
- CN
- China
- Prior art keywords
- layer
- pipe
- cast iron
- glass fiber
- heat
- 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
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 32
- 238000009413 insulation Methods 0.000 title description 7
- 239000003365 glass fiber Substances 0.000 claims abstract description 28
- 239000004744 fabric Substances 0.000 claims abstract description 23
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 21
- 238000005336 cracking Methods 0.000 claims abstract description 21
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 21
- 238000004804 winding Methods 0.000 claims abstract description 15
- 239000004698 Polyethylene Substances 0.000 claims abstract description 14
- -1 polyethylene Polymers 0.000 claims abstract description 14
- 229920000573 polyethylene Polymers 0.000 claims abstract description 14
- 239000003822 epoxy resin Substances 0.000 claims abstract description 4
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 238000004321 preservation Methods 0.000 claims description 20
- 239000000835 fiber Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 60
- 230000007797 corrosion Effects 0.000 abstract description 9
- 238000005260 corrosion Methods 0.000 abstract description 9
- 239000011241 protective layer Substances 0.000 abstract description 7
- 229920003023 plastic Polymers 0.000 abstract description 5
- 239000004033 plastic Substances 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000010959 steel Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000032683 aging Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Landscapes
- Thermal Insulation (AREA)
Abstract
The utility model relates to a spheroidal graphite cast iron prefabricated heat-insulating pipe with anti-cracking performance, which belongs to the field of heat-insulating pipe production and comprises a working pipe, and a heat-insulating layer, an anti-cracking layer and an outer protective layer which are sequentially arranged on the outer side of the working pipe from inside to outside, wherein the working pipe is a K9-grade spheroidal graphite cast iron pipe, the heat-insulating layer is a hard polyurethane foam plastic layer coated on the outer side of the spheroidal graphite cast iron pipe in a spraying manner, the anti-cracking layer is a warp-knitted glass fiber mesh cloth wrapping layer wound on the outer side of the polyurethane foam layer, and the outer protective layer is a polyethylene winding layer spirally wound on the outer side of the glass fiber mesh cloth layer. The glass fiber mesh cloth wrapping layer and the polyurethane foam layer as well as the polyethylene winding layer are glued and bonded together through an epoxy resin adhesive. The spheroidal graphite cast iron prefabricated heat-insulating pipe with the anti-cracking performance can effectively improve the anti-cracking performance, corrosion resistance, pressure resistance, tensile strength and other performances of the heat-insulating pipe, and prolong the service life of the heat-insulating pipe.
Description
Technical Field
The utility model belongs to the field of production of heat-insulating pipes, and particularly relates to a spheroidal graphite cast iron prefabricated heat-insulating pipe with crack resistance.
Background
The heat-insulating pipe is also called a thermal pipeline, and is generally composed of a steel pipe and a heat-insulating layer wrapped on the outer side of the steel pipe, the heat-insulating layer of the existing heat-insulating pipe is mostly a polyurethane foam layer, because the heat-insulating pipe is generally laid by direct burying or outdoor erection, wind blowing, sun drying, rain, damp and corrosion can accelerate the ageing of the steel pipe and the heat-insulating layer, especially the problem that the heat-insulating layer is easy to crack after the ageing of the polyurethane foam heat-insulating layer, further, the heat preservation effect of the heat preservation pipe is affected, in addition, the corrosion resistance, the pressure resistance, the tensile strength and the like of the existing heat preservation pipe steel pipe are not ideal, the service life of the heat preservation pipe can be seriously shortened, so that how to improve the crack resistance of the heat preservation pipe and the service life of the heat preservation pipe is a technical problem which is solved by the heat distribution pipe industry all the time.
Disclosure of utility model
Aiming at the situation, the utility model provides the spheroidal graphite cast iron prefabricated heat-insulating pipe with the anti-cracking performance, which can effectively improve the anti-cracking performance, corrosion resistance, pressure resistance, tensile strength and other performances of the heat-insulating pipe and prolong the service life of the heat-insulating pipe.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a prefabricated insulating tube of nodular cast iron with crack resistance, includes work pipe and from inside to outside sets gradually heat preservation, crack resistant layer and the outer sheath in its outside, the work pipe is the nodular cast iron pipe, the heat preservation is the polyurethane foam layer of spraying cladding in the nodular cast iron pipe outside, crack resistant layer is the fine net cloth parcel layer of glass of winding in the polyurethane foam layer outside, the outer sheath is the polyethylene winding layer of winding in the glass fiber net cloth layer outside.
Furthermore, the ductile cast iron pipe is preferably a K9-grade ductile cast iron pipe, and has the characteristics of high wall thickness and high bearing capacity.
Further, the polyurethane foam layer is a hard polyurethane foam plastic layer and has the characteristics of porosity, small relative density and high specific strength.
Further, the glass fiber mesh cloth used in the glass fiber mesh cloth wrapping layer is warp-knitted glass fiber mesh cloth formed by binding and overlapping glass fiber warp yarns and glass fiber weft yarns through warp-knitted chemical fiber network yarns, and has the characteristics of high crack resistance, small elongation, good bonding property with an inner heat preservation layer and an outer protective layer, difficulty in stripping and the like.
Further, the polyethylene winding layer is fully sealed and wrapped on the outer side of the glass fiber mesh cloth layer in a heating extrusion spiral winding forming mode, so that the corrosion resistance of the heat-insulating pipeline is improved.
Further, the glass fiber mesh cloth wrapping layer, the polyurethane foam layer and the polyethylene wrapping layer are all glued together through epoxy resin adhesive, so that the firmness and reliability of connection between the polyurethane foam layer and the glass fiber mesh cloth wrapping layer and between the glass fiber mesh cloth wrapping layer and the polyethylene wrapping layer are ensured.
Further, the two ends of the working pipe are provided with exposed end heads with the length of 150+/-10 mm, so that when the heat-insulation pipeline is paved, the two working pipes are welded on site between the butt joint ends, and the exposed end heads are required to be repaired after welding.
The utility model also comprises other components which can be used normally, which are conventional means in the art, and in addition, devices or components which are not limited in the utility model, such as K9-grade nodular cast iron pipes, rigid polyurethane foam plastic, warp-knitted glass fiber mesh cloth, polyethylene winding layers and the like, all adopt the prior art in the field.
The beneficial effects of the utility model are as follows:
The spheroidal graphite cast iron prefabricated heat-insulating pipe with the anti-cracking performance effectively improves the anti-cracking performance of the heat-insulating pipe by additionally arranging the protective net layer on the outer side of the polyurethane heat-insulating layer and winding the polyethylene protective layer on the outer layer, meanwhile, compared with a common steel pipe commonly adopted in the prior art, the spheroidal graphite cast iron prefabricated heat-insulating pipe with the anti-cracking performance has the advantages that the corrosion resistance, the pressure resistance, the tensile strength and the like are obviously improved, the service life of the heat-insulating pipe is prolonged, the maintenance and replacement period of the heat-insulating pipe is prolonged, the labor intensity of maintenance personnel of the pipe is reduced, and the purchase cost and the use cost of a heating power pipeline are saved.
Drawings
Fig. 1 is a schematic perspective view of a spheroidal graphite cast iron prefabricated heat-insulating pipe in an embodiment.
Fig. 2 is a schematic cross-sectional view of the spheroidal graphite cast iron prefabricated heat preservation pipe in fig. 1.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments.
Example 1
As shown in figures 1-2, the spheroidal graphite cast iron prefabricated heat-insulating pipe with the anti-cracking performance comprises a working pipe 1, and a heat-insulating layer 2, an anti-cracking layer 3 and an outer protective layer 4 which are sequentially arranged on the outer side of the working pipe from inside to outside.
The working tube 1 is a K9-grade ductile cast iron tube, has the material characteristics of cast iron and steel, and has the advantages of strong corrosion resistance, high mechanical strength, good extensibility and good sealing effect.
The heat preservation layer 2 is a hard polyurethane foam plastic layer coated on the outer side of the nodular cast iron pipe in a spraying mode, and has the advantages of being porous, small in relative density and high in specific strength.
The anti-cracking layer 3 is a warp-knitted glass fiber mesh cloth formed by binding and overlapping glass fiber warp yarns and glass fiber weft yarns wound on the outer side of the polyurethane foam layer through warp-knitted chemical fiber network yarns, has excellent anti-cracking strength, and meanwhile has good bonding property with the polyurethane foam plastic layer and the polyethylene winding layer on the inner side, so that the anti-cracking performance of the heat preservation layer 2 can be effectively improved, and the problem of ageing and cracking of the heat preservation layer 2 is solved.
The outer protective layer 4 is a polyethylene winding layer which is fully-closed and spirally wound and wrapped on the outer side of the glass fiber mesh cloth layer in a heating extrusion molding mode, is beneficial to improving the waterproof, dampproof, corrosion resistant and wear resistant properties of the heat-insulating pipeline, and also plays a role in protecting the inner heat-insulating layer 2.
The glass fiber mesh cloth wrapping layer, the polyurethane foam layer and the polyethylene winding layer are firmly glued and bonded through the epoxy resin adhesive, so that the bonding strength between each layered structure of the heat-insulation pipeline is improved.
The two ends of the working pipe 1 are respectively provided with a 150+/-10 mm exposed end part 5 in a circular cutting way, so that the on-site welding between the butt joint ends of the two working pipes 1 is convenient when the heat-insulation pipeline is laid, and the exposed end parts 5 are required to be subjected to joint coating after welding, namely, the outer sides of the welded joint parts are sequentially subjected to on-site supplement manufacturing of the heat-insulation layer 2, the anti-cracking layer 3 and the outer protective layer 4, the heat insulation, the corrosion resistance and the anti-cracking performance of the joint parts are ensured, and the service life of the heat-insulation pipeline is prolonged.
The technical solution of the present utility model is not limited to the above-described specific embodiments, and many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments, and any technical modifications made within the spirit and principles of the present utility model fall within the scope of the present utility model.
Claims (7)
1. The nodular cast iron prefabricated heat preservation pipe with the cracking resistance is characterized by comprising a working pipe, and a heat preservation layer, a cracking resistance layer and an outer protection layer which are sequentially arranged on the outer side of the working pipe from inside to outside, wherein the working pipe is a nodular cast iron pipe, the heat preservation layer is a polyurethane foam layer coated on the outer side of the nodular cast iron pipe in a spraying mode, the cracking resistance layer is a glass fiber mesh cloth wrapping layer wound on the outer side of the polyurethane foam layer, and the outer protection layer is a polyethylene winding layer wound on the outer side of the glass fiber mesh cloth layer.
2. The prefabricated heat insulating spheroidal graphite cast iron pipe with crack resistance according to claim 1, wherein the spheroidal graphite cast iron pipe is a K9-grade spheroidal graphite cast iron pipe.
3. The nodular cast iron prefabricated heat preservation pipe with the crack resistance according to claim 1, wherein the polyurethane foam layer is a hard polyurethane foam layer.
4. The nodular cast iron prefabricated heat preservation pipe with the crack resistance according to claim 1, wherein the glass fiber mesh cloth used by the glass fiber mesh cloth wrapping layer is warp-knitted glass fiber mesh cloth formed by binding and overlapping glass fiber warp yarns and glass fiber weft yarns through warp-knitted chemical fiber network yarns.
5. The prefabricated heat insulating spheroidal graphite cast iron pipe with crack resistance according to claim 1, wherein the polyethylene winding layer is spirally wound on the outer side of the glass fiber mesh cloth layer.
6. The nodular cast iron prefabricated heat preservation pipe with the crack resistance according to claim 1, wherein the glass fiber mesh cloth wrapping layer, the polyurethane foam layer and the polyethylene winding layer are bonded together through epoxy resin adhesive bonding.
7. The prefabricated heat insulating spheroidal graphite cast iron pipe with crack resistance according to claim 1, wherein the two ends of the working pipe are provided with exposed end heads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421218114.9U CN222277724U (en) | 2024-05-30 | 2024-05-30 | A ductile iron prefabricated insulation pipe with crack resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421218114.9U CN222277724U (en) | 2024-05-30 | 2024-05-30 | A ductile iron prefabricated insulation pipe with crack resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222277724U true CN222277724U (en) | 2024-12-31 |
Family
ID=93952963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421218114.9U Active CN222277724U (en) | 2024-05-30 | 2024-05-30 | A ductile iron prefabricated insulation pipe with crack resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222277724U (en) |
-
2024
- 2024-05-30 CN CN202421218114.9U patent/CN222277724U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107588286A (en) | Hollow wall continuous fiber prepreg tape winding pipe | |
| CN222200962U (en) | Bamboo-plastic braided rope and composite pipe using same | |
| CN108018874A (en) | For the sliceable pipe fitting of the compound pipe gallery of bamboo and the piping lane including the pipe fitting | |
| CN216813212U (en) | Tensile and anti-bending interlayer type thermal restoration pipe | |
| CN207489516U (en) | A kind of anti-severe cold power cable for wind power generation | |
| CN211289046U (en) | Anti-seismic plastic pipe | |
| CN211715954U (en) | Novel waterproof sun-proof antifreeze steel-plastic composite prefabricated direct-buried heat-insulation pipe elbow | |
| CN211145779U (en) | Polyethylene-protected direct-buried heat-insulation pipe | |
| CN206545226U (en) | The sliceable pipe fitting and piping lane including the pipe fitting of pipe gallery are combined for bamboo | |
| CN207687573U (en) | A kind of buried central heating utilidor system | |
| CN222502988U (en) | Low-temperature-resistant anti-cracking PPR water supply composite pipe | |
| CN215928662U (en) | Steel wire reinforced ultra-high molecular weight polyethylene sheet winding composite pipe | |
| CN222811436U (en) | A kind of frost-proof and corrosion-resistant PE pipe | |
| CN216557728U (en) | Anti-freezing water guide pipe for solar water heater | |
| CN215908580U (en) | Large-diameter anti-cracking PE plastic pipe | |
| CN221298271U (en) | Heat preservation rock wool board structure | |
| CN205101176U (en) | A combined material for wind power generation pylon | |
| CN206592694U (en) | Presulfurization welded type non-metal compensator | |
| CN223318765U (en) | A kind of antifreeze polyethylene vacuum insulation pipe | |
| CN222122455U (en) | A plastic pipe with high temperature resistance | |
| CN112648473A (en) | Steel-plastic composite heat-insulation flexible composite pipe | |
| CN223895319U (en) | Low-temperature-resistant and freezing-resistant plastic-coated composite steel pipe | |
| CN219530223U (en) | Anti-corrosion heat-insulating layer suitable for low-temperature polyethylene steel pipe below-25 DEG C | |
| CN222977622U (en) | High-barrier low-temperature-resistant nonmetallic pipeline | |
| CN117386896B (en) | Environmentally friendly prefabricated insulated pipe based on foam hardening within the casing and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |