CN2116139U

CN2116139U - Polyvinyl and polyvinyl-chloride composite pipe

Info

Publication number: CN2116139U
Application number: CN 92202970
Authority: CN
Inventors: 贾效羽
Original assignee: SHENGLI PLASTIC PRODUCTS FACTORY HARBIN CITY
Current assignee: SHENGLI PLASTIC PRODUCTS FACTORY HARBIN CITY
Priority date: 1992-02-19
Filing date: 1992-02-19
Publication date: 1992-09-16

Abstract

The utility model relates to a plastic composite pipe, in particular to a composite plastic pipe used for the wire threading of the electric wire for the construction. The composite pipe is divided into an inner pipe and an outer pipe, and the inner pipe and the outer pipe are in the common-squeezing matching state. The inner pipe and the outer pipe can be separated, and can be inserted, and the inserting point is in equal internal diameter and equal outer diameter with the original composite pipe. The inner pipe and the outer pipe can be made up of different materials, and thus the different outside requirement can be satisfied. The polyethylene and the polyvinylchloride composite pipe are taken for example, the polyethylene on the outer layer enhances the toughness of the composite pipe, and the polyvinyl chloride pipe of the inner layer is used as the fire retardant layer. Thus, the composite pipe is suitable for the wire threading of the electric wire for the north construction unit, or any other occasion with the different requirements of the inner pipe and the outer pipe, or the off-grade connecting occasion.

Description

Polyvinyl and polyvinyl-chloride composite pipe

The utility model is disclosed to be a kind of plastic composite pipe, refers in particular to the composite bed plastic tube as electric wire threading for building.

At present composite pipe is fused after the extruding and moulding for material of the same race is made, can difference except that color and luster, be as good as with mono-layer tube, it can only be welding that two pipes connect.

The purpose of this utility model is to provide a kind of internal and external layer can satisfy the different composite pipes that require and can socket joint connect.

Pipe 1 and outer tube 2 in content of the present utility model comprises, interior pipe 1 and outer tube 2 are in the mated condition that two extruders is associated in the moulding simultaneously of the last co-extrusion of same head, under this mated condition, when composite pipe connects, peel off the interior pipe of equal length or the outer tube of two pipe ends respectively, two pipe ends can be plugged on together, external diameter, uniform internal diameters such as splicing position and former pipe when connecting with caliber.

Effect of the present utility model is:

1, the material of interior pipe and outer tube can be selected according to different requirements, and form the dual performance of pipe, and as pipe in doing with PVC, LDPE makes outer tube, interior pipe adds fire retardant, and flame retardant property is better, and the anti-low temperature of outer tube is good, be difficult for embrittlement, construction brings great convenience to north of china in winter, and practicability is good.

2, can remove the welding connecting process there not being other pipe fitting lower link, connection place and former pipe are isometrical, and it is extremely convenient to pass hole, and connection place processing must equipment, and simple tool can be processed, and on-the-spot the connection conveniently, cuts down tube head utilization ratio height.

Accompanying drawing 1 is the plastic composite pipe sectional view;

Accompanying drawing 2 connects figure for plastic composite pipe;

Embodiment:

Adopt polyethylene, PVC as outer tube and interior tubing matter; extruding is combined into composite pipe; because there is the polyethylene protective layer in the outside; improved the easily broken characteristic of low-temperature embrittleness of PVC penetration pipe; protected on intensity and toughness, because outside tensile stress maximum, interior pipe adopts pvc material; avoided the poor fire of whole employing polyethylene pipes, problems such as fire prevention hidden danger have been arranged.Because interior pipe and outer tube are the fit tube of a head coextrusion mold, pipe and outer tube hoop all can be peelled off after cutting off in it, when two pipes connect, a compound pipe end can be peelled off one section outer tube, the interior pipe of same length is peelled off in another composite pipe end, interior pipe with a pipe end inserts in the outer tube of another pipe end, make two pipes uniform internal diameter, etc. the situation lower link of external diameter.

Claims

1, a kind of plastic composite pipe, it is characterized in that in it pipe and with this in the same head co-extrusion of pipe, the mutually bonding cooperation of outer tube of moulding simultaneously, this mated condition is for after extruding being stationary fit, artificial loosening after or be transition fit under the inserting state.

2, plastic composite pipe according to claim 1, pipe adopts the PVC plastics to add fire retardant in it is characterized in that, and outer tube adopts the LDPE plastics.