CN205244638U

CN205244638U - Heavy -calibre beta - compound pipe of PPR heat preservation

Info

Publication number: CN205244638U
Application number: CN201521021685.4U
Authority: CN
Inventors: 胡正华; 高莉; 程优婷
Original assignee: Zhejiang Weixing New Building Materials Co Ltd
Current assignee: Zhejiang Weixing New Building Materials Co Ltd
Priority date: 2015-12-10
Filing date: 2015-12-10
Publication date: 2016-05-18
Anticipated expiration: 2025-12-10

Abstract

The utility model provides a heavy -calibre beta - compound pipe of PPR heat preservation, belongs to cold hot water delivery inlet pipeline technology field. It crowds extrusion moulding by polyethylene protective layer, polyethylene foam insulation layer and beta - PPR inner tube altogether, and the polyethylene protective layer is the corrugate structure. The utility model discloses a 2 -3 that 15-14, polyethylene foam insulation layer thickness that polyethylene protective layer thickness is beta - PPR inner tube thickness is beta - PPR inner tube thickness doubly. The utility model discloses black corrugate structure is protected to the outer polyethylene that adopts, can improve outer resistance to compression rigidity, the thermal -insulated effect of foaming layer compressive deformation influence in the middle of avoiding, adopt polyethylene chemical method foaming preparation heat preservation, processing is convenient, green, and the rigidity is better, has toughness again, avoids compressive deformation and impact fracture, and the inlayer adopts beta - withstand voltage higher grade of its hot water of PPR inner tube, advantages such as its quality is light, green, impact resistance are good, corrosion -resistant, ageing -resistant, without foamed in place, transport, welding are convenient, can the wide application in the hot water delivery inlet field.

Description

A kind of heavy caliber β-PPR composite insulating pipe

Technical field

The utility model belongs to hot and cold water conveyance conduit technical field, is specifically related to a kind of heavy caliber β-PPR composite insulating pipe with good heat preservation effect.

Background technology

In order to improve the comfort of resident's entirety life, heat supply heating equipment is constantly improved in each big city, and wherein delivery pipeline demand is huge, but the conveying of hot water adopts polyurethane heat-insulation metal tube conventionally at present, its thermal loss is large and be unfavorable for construction, although the insulation PPR of development in recent years pipe makes moderate progress, due to the restriction of PPR strength grade, in the time of processing heavy caliber pipe, required wall thickness is larger, both be unfavorable for construction, and wasted again material, engineering overall cost is higher.

, although heat insulation effect is better, there is easily aging, environmental pollution in conventional polyurethane foamed thermal-insulating layer, once especially polyurethane foam burning will produce the gas that contains hypertoxic hydrogen cyanide, very harmful.

Utility model content

For the above-mentioned problems in the prior art, the purpose of this utility model is to provide a kind of heavy caliber β-PPR composite insulating pipe with good heat preservation effect.

Described a kind of heavy caliber β-PPR composite insulating pipe, adopts three-layer composite structure, it is characterized in that described polyethylene protective layer is wave structure by polyethylene protective layer, polyethylene foam heat-insulation layer and the extrusion molding of β-PPR inner tube co-extrusion.

Described a kind of heavy caliber β-PPR composite insulating pipe, is characterized in that described polyethylene protective layer thickness is 1/5 ~ 1/4 of the interior tube thickness of β-PPR.

Described a kind of heavy caliber β-PPR composite insulating pipe, is characterized in that described polyethylene foam insulation layer thickness is 2-3 times of tube thickness in β-PPR.

Described a kind of heavy caliber β-PPR composite insulating pipe, is characterized in that polyethylene foam heat-insulation layer is alveolate texture, and abscess aperture is 2mm-3mm.

Described a kind of heavy caliber β-PPR composite insulating pipe, is characterized in that described β-PPR inner tube adopts 125*20.8 specification, and polyethylene foam heat-insulation layer adopts 40mm thickness, and polyethylene protective layer adopts 4mm thickness.

Above-mentioned a kind of heavy caliber β-PPR composite insulating pipe; adopt three-layer composite structure; it is by polyethylene protective layer, polyethylene foam heat-insulation layer and the extrusion molding of β-PPR inner tube co-extrusion; described polyethylene protective layer is wave structure; polyethylene protective layer thickness is 1/5 ~ 1/4 of the interior tube thickness of β-PPR, and polyethylene foam insulation layer thickness is 2-3 times of tube thickness in β-PPR. The outer polyethylene that adopts of the utility model is protected black wave structure, can improve outer resistance to compression rigidity, avoids middle foaming layer compressive deformation to affect effect of heat insulation; Internal layer adopts β-PPR inner tube, more obvious than common PPR tubing advantage, hot water voltage withstand class is higher, while comparing the same external diameter of PPR, wall thickness is thinner, and flow latus rectum is larger, when same flow latus rectum, β-PPR tubing is saved 18% left back than common PPR wall thickness, heavy caliber β-PPR composite insulating pipe that the utility model obtains, its quality is light, environmental protection, good impact resistance, the advantage such as corrosion-resistant, ageing-resistant, without foam-in-place, carrying, convenient welding, can be widely used in delivery field.

Brief description of the drawings

Fig. 1 is axial sectional structure schematic diagram of the present utility model;

Fig. 2 is radially sectional structure schematic diagram of the present utility model.

In figure: 1-polyethylene protective layer, 2-polyethylene foam heat-insulation layer, 3-β-PPR inner tube.

Detailed description of the invention

Below in conjunction with Figure of description, the utility model will be further described, but protection domain of the present utility model is not limited in this:

As depicted in figs. 1 and 2, a kind of heavy caliber β-PPR composite insulating pipe of the present utility model, adopts three-layer composite structure, by polyethylene protective layer 1, polyethylene foam heat-insulation layer 2 and the 3 co-extrusion extrusion moldings of β-PPR inner tube.

Described polyethylene protective layer 1 is black wave structure, and it adopts black high density polyethylene (HDPE) raw material, can improve outer resistance to compression rigidity, avoids polyethylene foam heat-insulation layer 2 compressive deformations to affect effect of heat insulation; Polyethylene foam heat-insulation layer 2 is alveolate texture, and abscess aperture is controlled at 2mm-3mm, foaming layer density 0.04 ~ 0.05g/cm³. Thermal conductivity factor is less than 0.04w/mk, the compound compositions such as this insulating foam layer employingization blowing agent and ldpe resin, auxiliary agent, the formula that these people steep heat-insulation layer is routine techniques, concrete foam process, formula are with reference to describing in CN104558780A, easy to process, environmental protection, polyethylene used can be medium density polyethylene or low density polyethylene (LDPE), abscess is hole-closing structure, polyethylene foam layer retains rigidity, has certain toughness again, avoids compressive deformation and impact failure; β-PPR inner tube 3 adopts β-PPR PP Pipe Compound to prepare, β-PPR special material for tube that the β-PPR PP Pipe Compound using in the utility model embodiment is Borealis, it is Beta-PPRRA7050-GN PP Pipe Compound, this β-PPR inner tube 3 can be used for a long time at 70 DEG C, under 90 DEG C and higher temperature, the short time is used, in the time of the logical hot water of heat supply, security is higher.

Polyethylene protective layer 1 thickness described in the utility model is 1/5 ~ 1/4 of β-PPR inner tube 3 thickness; polyethylene foam heat-insulation layer 2 thickness are 2-3 times of β-PPR inner tube 3 thickness; in embodiment; β-PPR inner tube 3 adopts 125*20.8 specification; polyethylene foam heat-insulation layer 2 adopts 40mm thickness, and polyethylene protective layer 1 adopts 4mm thickness.

As shown in the figure, this tubing of the present utility model passes through coextrusion mold, the material of three layers is put into respectively three extruders, get to know by a co-extrusion, the extrusion molding of three-decker one, can produce continuously, β-PPR inner tube 3 expressing techniques adopt 190 DEG C of barrel zone temperatures, 220 DEG C of die head temperatures, 230 DEG C of mold clearing temperatures; The expressing technique of polyethylene foam heat-insulation layer 2 adopts 220 DEG C of barrel zone temperatures, 190 DEG C of die head temperatures, 170 DEG C of mold clearing temperatures; Polyethylene protective layer 1 adopts polyethylene expressing technique.

Heavy caliber β-PPR composite insulating pipe that the utility model obtains, by adopting heat-resistant pressure-resistant β-PPR inner tube, PE high-foaming heat-insulation layer and PE bellows skin, its quality is light, environmental protection, good impact resistance, the advantage such as corrosion-resistant, ageing-resistant, without foam-in-place, carrying, convenient welding, can be widely used in delivery field.

Claims

1. heavy caliber β-PPR composite insulating pipe; adopt three-layer composite structure; it is characterized in that described polyethylene protective layer (1) is wave structure by polyethylene protective layer (1), polyethylene foam heat-insulation layer (2) and β-PPR inner tube (3) co-extrusion extrusion molding.

2. a kind of heavy caliber β-PPR composite insulating pipe according to claim 1, is characterized in that described polyethylene protective layer (1) thickness is 1/5 ~ 1/4 of β-PPR inner tube (3) thickness.

3. a kind of heavy caliber β-PPR composite insulating pipe according to claim 1, is characterized in that described polyethylene foam heat-insulation layer (2) thickness is 2-3 times of β-PPR inner tube (3) thickness.

4. a kind of heavy caliber β-PPR composite insulating pipe according to claim 1, is characterized in that polyethylene foam heat-insulation layer (2) is alveolate texture, and abscess aperture is 2mm-3mm.

5. a kind of heavy caliber β-PPR composite insulating pipe according to claim 1, is characterized in that described β-PPR inner tube (3) adopts 125*20.8 specification, and polyethylene foam heat-insulation layer (2) adopts 40mm thickness, and polyethylene protective layer (1) adopts 4mm thickness.