CN210424184U

CN210424184U - Multilayer heat preservation steel pipe

Info

Publication number: CN210424184U
Application number: CN201920716919.9U
Authority: CN
Inventors: 吴竹松
Original assignee: Zhuji City Wochi Machinery Technology Co ltd
Current assignee: Zhuji City Wochi Machinery Technology Co ltd
Priority date: 2019-05-17
Filing date: 2019-05-17
Publication date: 2020-04-28
Anticipated expiration: 2029-05-17

Abstract

The utility model discloses a multilayer heat preservation steel pipe, including the steel pipe body, there is polyurethane foam steel pipe body periphery, and there is polyethylene jacket pipe polyurethane foam steel pipe body periphery, and polyethylene jacket pipe's tip is equipped with the connecting rod and the lantern ring, and polyethylene jacket pipe and the lantern ring are connected to the connecting rod, and the steel pipe body runs through the lantern ring. The utility model discloses a multilayer insulation construction makes the heat preservation steel pipe have excellent thermal insulation performance, still has better waterproof, corrosion resisting property simultaneously, and insulation construction is inseparable, is difficult for appearing the gap between the heat preservation at different levels, heat preservation steel pipe long service life.

Description

Multilayer heat preservation steel pipe

Technical Field

The utility model belongs to the steel pipe field, concretely relates to multilayer heat preservation steel pipe.

Background

The heat preservation steel pipe refers to a steel pipeline with the temperature meeting the use requirement in the steel pipe under different environments after the heat preservation process. The heat preservation steel pipe is widely applied to the fields of liquid and gas conveying pipe networks, chemical pipelines, heat preservation engineering, petroleum, central heating and heating networks, central air conditioning ventilation pipelines, municipal engineering and the like. The periphery of the common heat-insulating steel pipe is provided with polyurethane foam, and the periphery of the polyurethane foam is also provided with a polyethylene jacket pipe. The polyurethane foam has extremely low heat conductivity coefficient, is an ideal heat insulation material, the polyethylene jacket pipe has better water resistance and corrosion resistance, and the polyurethane foam and the polyethylene jacket pipe have light weight and are convenient for the installation of heat insulation pipelines. However, because polyethylene is a non-polar material, the polyethylene jacket pipe and the polyurethane foam are difficult to be effectively bonded, so that a gap may be formed between the polyethylene jacket pipe and the polyurethane foam, and the connection between the polyethylene jacket pipe and the heat-insulating steel pipe is not tight.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multilayer heat preservation steel pipe, the heat preservation effect is excellent, and the polyethylene jacket pipe is closely connected with the heat preservation steel pipe, and water-resistant corrosion resistance is better.

In order to solve the technical problem, the utility model discloses an adopt following technical scheme:

a multilayer heat preservation steel pipe which is characterized in that: including the steel pipe body, there is polyurethane foam steel pipe body periphery, and there is polyethylene jacket pipe polyurethane foam steel pipe body periphery, and the tip of polyethylene jacket pipe is equipped with connecting rod and lantern ring, and polyethylene jacket pipe and lantern ring are connected to the connecting rod, and the steel pipe body runs through the lantern ring. The polyethylene jacket pipe is fixed on the steel pipe body through the connecting rod and the lantern ring, so that the polyethylene jacket pipe, the polyurethane foam and the steel pipe body are tightly connected.

Further, a handle bolt is arranged on the lantern ring and penetrates through the lantern ring to be connected with the steel pipe body. The lantern ring is pressed tightly on the steel pipe body by the handle bolt, so that the connection between the polyethylene jacket pipe and the steel pipe body is enhanced.

Further, a ceramic heat insulation layer is arranged between the polyurethane foam and the steel pipe body. The ceramic heat insulation layer has excellent heat insulation effect and good heat resistance, and can avoid carbonization of directly contacted polyurethane foam caused by overhigh temperature in the steel pipe.

Further, polyethylene foam is arranged between the polyurethane foam and the polyethylene jacket pipe. The polyethylene foam has the advantages of small heat conductivity coefficient and small water absorption, and compared with polyurethane foam, the polyethylene foam has better acid, alkali and salt resistance and better corrosion resistance, and can not only preserve heat but also play a role in protecting the polyurethane foam after being surrounded by the polyurethane foam.

Further, the outer side of the polyurethane foam is provided with a T-shaped bulge, and the T-shaped bulge is matched with the inner side of the polyethylene foam. The arrangement of the T-shaped bulge part enables the polyurethane foam to be clamped in the polyethylene foam, and the polyurethane foam and the polyethylene foam are tightly connected.

Further, a first adhesive layer is provided between the polyurethane foam and the polyethylene foam. The first adhesive layer provides better adhesion between the polyurethane foam and the polyethylene foam.

Further, a second adhesive layer is arranged between the polyethylene foam and the polyethylene jacket pipe. The second adhesive layer prevents a gap from occurring between the polyethylene foam and the polyethylene jacket pipe.

Further, the end of the steel pipe body is sleeved with a flange. The heat preservation steel pipes are connected through flanges.

Further, the outer surface of the polyethylene jacket pipe is provided with a polytetrafluoroethylene coating. The polytetrafluoroethylene coating has excellent waterproof, oil-proof and anti-corrosion performances, and the anti-corrosion effect of the polyethylene jacket pipe is enhanced.

Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:

the utility model discloses a multilayer insulation construction makes the heat preservation steel pipe have excellent thermal insulation performance, still has better waterproof, corrosion resisting property simultaneously, and insulation construction is inseparable, is difficult for appearing the gap between the heat preservation at different levels, heat preservation steel pipe long service life. The method has the following specific beneficial effects:

1. the polyethylene jacket pipe is fixed on the steel pipe body through the connecting rod and the lantern ring, and the lantern ring is fixed on the steel pipe body through the handle bolt, so that the polyethylene jacket pipe is tightly connected with the steel pipe body.

2. The T-shaped bulge part arranged on the polyurethane foam enables the polyurethane foam to be clamped in the polyethylene foam, the polyurethane foam is tightly connected with the polyethylene foam, and the polyethylene foam enhances the corrosion resistance of the heat-preservation steel pipe.

3. The ceramic heat insulation layer has excellent heat insulation effect and good heat resistance, and can avoid carbonization of directly contacted polyurethane foam caused by overhigh temperature in the steel pipe.

4. The two layers of bonding layers avoid gaps between the heat-insulating layers at all levels and strengthen the connection between the heat-insulating layers.

Drawings

The present invention will be further explained with reference to the drawings.

FIG. 1 is a cross-sectional view of the present invention;

fig. 2 is a schematic structural view of one end of a multi-layer heat preservation steel pipe of the present invention.

Detailed Description

As shown in fig. 1 and 2, the multi-layer heat preservation steel pipe sequentially comprises from inside to outside: the heat-insulating steel pipe comprises a steel pipe body 1, a ceramic heat-insulating layer 2, polyurethane foam 3, a first adhesive layer 4, polyethylene foam 5, a second adhesive layer 6, a polyethylene jacket pipe 7 and a polytetrafluoroethylene coating 8. The ceramic heat insulation layer 2 has excellent heat insulation effect and good heat resistance, and can avoid carbonization of the directly contacted polyurethane foam 3 caused by overhigh temperature in the steel pipe. The polyurethane foam 3 has low thermal conductivity and light weight, and is an ideal heat-insulating material. The polyethylene foam 5 has a lower thermal conductivity coefficient and better water and corrosion resistance than the polyurethane foam 3. The outer side of the polyurethane foam 3 is provided with a T-shaped bulge part 9, and the T-shaped bulge part 9 is matched with the inner side of the polyethylene foam 5. The arrangement of the T-shaped protruding part 9 enables the polyurethane foam 3 to be clamped in the polyethylene foam 5, meanwhile, the first bonding layer 4 arranged between the polyurethane foam 3 and the polyethylene foam 5 enables the polyurethane foam 3 and the polyethylene foam 5 to be connected more tightly, and the polyethylene foam 5 can play a role in protecting the polyurethane foam 3. The second adhesive layer 6 bonds the polyethylene foam 5 and the polyethylene jacket pipe 7 together. The first adhesive layer 4 and the second adhesive layer 6 prevent gaps from occurring between the polyurethane foam 3, the polyethylene foam 5, and the polyethylene jacket pipe 7, and prevent untight connection. The polytetrafluoroethylene coating 8 is sprayed on the outer part of the polyethylene jacket pipe 7, so that the waterproof and anti-corrosion performance of the heat-preservation steel pipe is further enhanced.

The end part of the polyethylene jacket pipe 7 is provided with a connecting rod 11 and a lantern ring 10, the connecting rod 11 is connected with the polyethylene jacket pipe 7 and the lantern ring 10, and the steel pipe body 1 penetrates through the lantern ring 10. The polyethylene jacket pipe 7 is fixed on the steel pipe body 1 through the connecting rod 11 and the lantern ring 10, so that the polyethylene jacket pipe 7 is tightly connected with the steel pipe body 1. The lantern ring 10 is provided with a handle bolt 12, and the handle bolt 12 penetrates through the lantern ring 10 to be connected with the steel pipe body 1. The lantern ring 10 is pressed tightly on the steel pipe body 1 by the handle bolt 12, so that the connection between the polyethylene jacket pipe 7 and the steel pipe body 1 is further enhanced, and the polyethylene jacket pipe 7 and the steel pipe body 1 are prevented from displacing. The end of the steel pipe body 1 is provided with a flange 13, and the plurality of heat preservation steel pipes are connected through the flange 13.

The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made on the basis of the present invention to solve the same technical problems and achieve the same technical effects are all covered by the protection scope of the present invention.

Claims

1. A multilayer heat preservation steel pipe which is characterized in that: the steel pipe comprises a steel pipe body, polyurethane foam is arranged on the periphery of the steel pipe body, a polyethylene jacket pipe is arranged on the periphery of the polyurethane foam, a connecting rod and a lantern ring are arranged at the end part of the polyethylene jacket pipe, the connecting rod is connected with the polyethylene jacket pipe and the lantern ring, and the steel pipe body penetrates through the lantern ring.

2. The multi-layer heat-insulating steel pipe as claimed in claim 1, wherein: and the lantern ring is provided with a handle bolt which penetrates through the lantern ring and is connected with the steel pipe body.

3. The multi-layer heat-insulating steel pipe as claimed in claim 1, wherein: and a ceramic heat insulation layer is arranged between the polyurethane foam and the steel pipe body.

4. The multi-layer heat-insulating steel pipe as claimed in claim 1, wherein: and polyethylene foam is arranged between the polyurethane foam and the polyethylene jacket pipe.

5. The multi-layer heat-insulating steel pipe as claimed in claim 4, wherein: the outer side of the polyurethane foam is provided with a T-shaped bulge, and the T-shaped bulge is matched with the inner side of the polyethylene foam.

6. The multi-layer heat-insulating steel pipe as claimed in claim 4, wherein: a first adhesive layer is arranged between the polyurethane foam and the polyethylene foam.

7. The multi-layer heat-insulating steel pipe as claimed in claim 4, wherein: and a second bonding layer is arranged between the polyethylene foam and the polyethylene jacket pipe.

8. The multi-layer heat-insulating steel pipe as claimed in claim 1, wherein: the end part of the steel pipe body is sleeved with a flange.

9. The multi-layer heat-insulating steel pipe as claimed in claim 1, wherein: the outer surface of the polyethylene jacket pipe is provided with a polytetrafluoroethylene coating.