CN2234033Y

CN2234033Y - Thermal-insulated pipe with expansion-limiting ring

Info

Publication number: CN2234033Y
Application number: CN 95232473
Authority: CN
Inventors: 薛春玉
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-10-16
Filing date: 1995-10-16
Publication date: 1996-08-28
Anticipated expiration: 2005-10-16

Abstract

The utility model relates to a thermal-insulated pipe with an expansion-limiting ring which is composed of a ring body, heating wires and an external guard pipe, wherein, the heating wires are preembedded at the inner round in the ring body, which enables the ring body to be welded on the outer surface of the external guard pipe. The heating wires are evenly distributed at interval for limiting the external guard pipe of the thermal-insulated pipe not to generate axial displacement.

Description

The thermal insulation pipe that has expansion-limiting ring

The utility model relates to a kind of thermal insulation pipe, particularly a kind of thermal insulation pipe that has expansion-limiting ring.

Steam direct-buried formula thermal insulation pipe product generally is combined type, and both interior pipe is outer to be equipped with thermal insulation layer, and thermal insulation layer is with outer pillar outward, outer pillar is generally plastic tube or steel pipe, when thermal insulation pipe moved, outer pillar surface temperature generally about 70 ℃, produced certain swell increment this moment.Cause the axially big displacement of thermal insulation pipe, bring burden, also influence using effect simultaneously to construction.

The purpose of this utility model is the outer pillar of thermal insulation pipe is made convex ring shape, when imbed underground after, by the big resistance that bulge loop and local products are given birth to, limit the axial displacement that the outer pillar of thermal insulation pipe produces.

The purpose of this utility model realizes by following measure:

It is made up of ring body, electric heating wire and outer pillar, and the place, garden is embedded with electric heating wire in the described ring body, and ring body is welded on the outer surface of pillar outside, and ring body is and spares the cloth arrangement at interval; Ring body directly is packed in the outer surface of outer pillar, is at interval even cloth and arranges.

Advantage of the present utility model and effect are:

1. adopt this kind structure can reduce additional facilities required in the construction and reduce construction cost.Comprehensive cost is minimized.

2. can improve the working life of pipeline, add expansion-limiting ring, both can guarantee limited axial displacement, also can improve the intensity and the rigidity of pipeline simultaneously.

Description of drawings is as follows:

Accompanying drawing of the present utility model is the partial structurtes sectional view of single ring body.

Below in conjunction with the accompanying drawing illustrated embodiment, the utility model is described further:

The outer pillar of [example 1] its thermal insulation pipe and expansion-limiting ring are that (as plastics etc.) this moment, after energising was heated, making its both fusion weld was one with ring body 1 and the pre-buried electric heating wire 2 in the outer pillar 3 contacted inner headed face places of thermal insulation pipe under the situation of nonmetallic material.Its ring body 1 can be made into convexs such as trapezoidal, square.

[example 2] can be fixed together outer pillar 3 direct welding of ring body 1 and thermal insulation pipe or modes such as riveted joint or screw thread when pillar outside the thermal insulation pipe and expansion-limiting ring are under the situation of metallic material.

The spacing that its expansion-limiting ring is arranged on the pillar outside, quantity and the height of itself, thickness etc. can and be heated according to concrete caliber, material, factor scene such as soil property decides.

Claims

1. the thermal insulation pipe that has expansion-limiting ring, formed by ring body (1), electric heating wire (2) and outer pillar (3), it is characterized in that described ring body (1) Nei Yuanchu is embedded with electric heating wire (2), ring body (1) be welded on the outer surface of pillar (3) outside that ring body (1) is at interval even cloth and arranges.

2. thermal insulation pipe as claimed in claim 1 is characterized in that ring body (1) directly is packed in the outer surface of outer pillar (3), is at interval even cloth and arranges.