CN207569392U - A kind of outdoor drainage pipe - Google Patents

Abstract

A kind of outdoor drainage pipe including the three-decker set from inside to outside, is followed successively by spheroidal graphite cast-iron drainpipe, heat insulation layer and protective layer, and heat insulation layer is polyurethane insulation coating, and protective layer is high density polyethylene protective coating or fiberglass protective layer.Rigid polyurethane foam stoste is disposably injected in the cavity formed between spheroidal graphite cast-iron drainpipe and protective layer with high pressure foaming machine to form, the utility model have improve drainpipe resistance to frost, ensure outdoor drainage it is unobstructed the characteristics of.

Description

A kind of outdoor drainage pipe

Technical field

The utility model is related to drainpipe technical field, more particularly to a kind of outdoor drainage pipe.

Background technology

In the prior art, in outdoor or cold district, pipeline corruption is be easy to cause due to being influenced by external environment The problems such as erosion, freezes, obstruction.It was laid in frost line more than outdoor drainage pipe in the past, surrounding sets clinker insulating layer, now due to ring Reason is protected, seldom using coal-burning boiler, the more difficult searching of clinker, the heat preservation bad solution of problem of outdoor drainage pipe.

Invention content

In order to overcome the disadvantages of the above prior art, the purpose of this utility model is to provide a kind of outdoor drainage pipe, drops Because blocking, when displacement is few, draining flow velocity is relatively low, the probability that freezes, suitable cold district apply low outdoor drainage pipe in winter Outdoor drainage pipe more than frost line, have improve drainpipe resistance to frost, ensure outdoor drainage it is unobstructed the characteristics of.

In order to achieve the above object, the technical solution that the utility model is taken is：

A kind of outdoor drainage pipe including the three-decker set from inside to outside, is followed successively by spheroidal graphite cast-iron drainpipe 1, thermal insulation Layer 2 and protective layer 3, the heat insulation layer 2 are polyurethane insulation coating, and protective layer 3 is high density polyethylene protective coating or fiberglass Protective layer.

The caliber DN200-DN500 of the spheroidal graphite cast-iron drainpipe 1.

The heat insulation layer 2 is closely adhered to 1 crust of spheroidal graphite cast-iron drainpipe.

The beneficial effects of the utility model：

The utility model reduces difficulty of construction, improves outdoor drainage pipe heat-insulating property, anti-corrosion, and good insulation preformance uses the longevity Life length.

Description of the drawings

Fig. 1 is the structure diagram of the utility model.

Specific embodiment

The utility model is further illustrated with reference to the accompanying drawings of the specification.

With reference to Fig. 1, a kind of outdoor drainage pipe including the three-decker set from inside to outside, is followed successively by spheroidal graphite cast-iron draining Pipe 1, heat insulation layer 2 and protective layer 3, the heat insulation layer 2 are polyurethane insulation coating, and protective layer 3 is high density polyethylene protective coating.

Polyurethane thermal conductivity factor is：λ=0.013-0.03kcal/mh DEG C, than past, more common clinker insulating layer is low Much, heat insulation effect is improved.Have that its water absorption rate is very low again, about 0.2kg/ ㎡.The reason of water absorption rate is low is due to polyurethane foam The rate of closed hole of foam is up to 92% or so.Low thermal conductivity and low water absorption, in addition heat insulation layer 2 and good highly dense of outside water resistance Polyethylene or fiberglass protective layer 3 are spent, the heat-insulating property of drainage pipeline is substantially increased, changes traditional clinker insulating layer and easily inhale Water, the situation of insulating layer failure.

Since hard polyurethane foam heat insulation layer 2 is closely adhered to 1 crust of spheroidal graphite cast-iron drainpipe, completely cut off air and The infiltration of water can play good antisepsis.Its foam hole is all to be closed simultaneously, water imbibition very little.High-density polyethylene Alkene protective layer 3, fiberglass protective layer 3 are respectively provided with good anti-corrosion, insulation and mechanical performance, and drainpipe crust is difficult by outer The erosion of boundary's air and water improves the service life of drainpipe.

First layer：Spheroidal graphite cast-iron drainpipe 1, caliber DN200-DN500.The second layer：Polyurethane, heat insulation layer 2, with high pressure Rigid polyurethane foam original is disposably injected in the cavity that bubble machine is formed between spheroidal graphite cast-iron drainpipe 1 and protective layer 3 Liquid forms." the tube-in-tube foam process " being commonly called as.It is waterproof that it, which acts on one, second is that heat preservation.Third layer：High density polyethylene (HDPE) is protected Sheath 3, is prefabricated into black (yellow) plastic pipe of certain wall thickness, and effect one is protection polyurethane insulation coating from mechanical hard Object destroys, second is that anti-corrosion waterproof.

Claims (1)

1. a kind of outdoor drainage pipe, which is characterized in that including the three-decker set from inside to outside, be followed successively by spheroidal graphite cast-iron draining (1), heat insulation layer (2) and protective layer (3) are managed, the heat insulation layer (2) is polyurethane insulation coating, and protective layer (3) gathers for high density Ethylene protective layer or fiberglass protective layer；

The caliber DN200-DN500 of the spheroidal graphite cast-iron drainpipe (1)；

The heat insulation layer (2) is closely adhered to spheroidal graphite cast-iron drainpipe (1) crust.