CN2932030Y

CN2932030Y - Electric heating thermal-insulating pipe

Info

Publication number: CN2932030Y
Application number: CN 200620075286
Authority: CN
Inventors: 程巍; 凌超
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-19
Filing date: 2006-07-19
Publication date: 2007-08-08
Anticipated expiration: 2016-07-19

Abstract

The utility model discloses an electrothermal heat preservation pipe, comprising a steel tube, a heat preservation layer outside the steel tube and a protective layer outside the heat preservation layer. A self-limited ribbon heater attached to the outer surface of the entire length of the steel tube is arranged between the steel tube and the heat preservation layer. The self-limited ribbon heater can be one or at least one thin self-limited ribbon heater of screw-type wrapped on the steel tube, or one or at least one self-limited ribbon heater radically arranged along the steel tube. The outside of the self-limited ribbon heater has an orderly arranged tinsel strip and belt covering the surface, and the belt sticks to the steel tube and the tinsel strip. For the utilization of the structure, the electrothermal heat preservation pipe of the utility model can limit the temperature automatically without the arrangement of the temperature controlling machine, which has a convenient installation without repair and maintenance.

Description

A kind of electric heating thermal insulation pipe

Technical field

The utility model relates to pipeline, relates in particular to the electric heating thermal insulation pipe of conveyance fluid.

Background technique

The insulation pipe that is applied to the conveyance fluid of oil, chemical industry, building and civilian industry at present has the efficient energy-saving electrothermal thermal insulation pipe, its structure is five layers, be followed successively by steel pipe, electrothermal layer, anticorrosive coat, thermal insulation layer, protective coating from inside to outside, electrothermal layer is by forming with the feed cable and the spiral carbon fiber electrothermal line that is wound on the steel pipe of steel shaft line parallel.Such structure needs supporting temperature controlling device, U type compensator, special connector, high-efficiency automatic control electric heating tube, and the overall installation joint is many, and fault is many, has therefore increased the workload of installation and maintenance debugging.

The model utility content

Technical problem to be solved in the utility model is: a kind of simple installation is provided, avoids overhauling the electric heating thermal insulation pipe of debugging.

Solve this technical problem, the technical solution of the utility model is: a kind of electric heating thermal insulation pipe, comprise the thermal insulation layer outside steel pipe, the steel pipe, the protective coating of thermal insulation layer outer surface, be provided with the PTC ribbon heater that is attached at the whole length outer surface of steel pipe between described steel pipe and the thermal insulation layer.

Described spiral being wound on the steel pipe in PTC ribbon heater that is attached at the whole length outer surface of steel pipe.

The described PTC ribbon heater that is attached at the whole length outer surface of steel pipe is disposed with outside this PTC ribbon heater and is covered in its surperficial metallic foil and the adhesive tape that adheres on steel pipe and the metallic foil along the steel pipe radial arrangement.Described metallic foil is an aluminium foil strip.

The utility model electric heating thermal insulation pipe adopts the PTC ribbon heater with switching characteristic and memory characteristic to be attached at steel pipe, energy low temperature quick starting, temperature is even, automatically limit is warm, need not to set up temp controller, can cut short arbitrarily or certain limit in any spreading and do not influence its use, simple installation avoids maintenance and safeguards.When with the self limiting type ribbon heater during along the steel pipe radial arrangement, because electrical heat tracing pipe moulding, it is aging easily to adhere on steel pipe and the metallic foil adhesive tape, therefore when one section electric heating thermal insulation pipe breaks down, can radially extract the self limiting type ribbon heater and change, save the spending of changing the electric heating thermal insulation pipe for the user.

Description of drawings

Fig. 1 is a kind of electric heating thermal insulation tubular construction of the utility model schematic representation;

Fig. 2 is a cross section cross-sectional schematic shown in Figure 1;

In Fig. 1, Fig. 2,1, steel pipe; 2, PTC ribbon heater; 3, aluminium foil strip; 4, thermal insulation layer; 5, adhesive tape; 6, protective coating.

Embodiment

As shown in Figure 1, the electric heating thermal insulation pipe mainly is made up of steel pipe 1, thermal insulation layer 4, protective coating 6, PTC ribbon heater 2, aluminium foil strip 3, adhesive tape 5, thermal insulation layer 4 is a polyamine fat vacuole foam material, protective coating 6 is the yellow jacket of polyethylene, protective coating 6 is the top layer of electric heating thermal insulation pipe, is thermal insulation layer 4 between steel pipe 1 and protective coating 6.Be pasted with a PTC ribbon heater 2 along steel pipe 1 radial arrangement on the outer surface of steel pipe 1, have being covered in its surperficial aluminium foil strip 3 and adhering to adhesive tape 5 on steel pipe 1 and the aluminium foil strip 4 of setting gradually outside this PTC ribbon heater 2, the outer surface of adhesive tape 5 is a thermal insulation layer 4.

The self limiting type ribbon heater that employing has switching characteristic and memory characteristic is attached at steel pipe, can be from adjusting power, and compensation automatically, the worry of energy-conservation, constant temperature, no high temperature hotspot; The low temperature quick starting, temperature is even, and automatically the limit temperature need not to set up temp controller, can cut off arbitrarily and does not influence its use, and simple installation avoids maintenance and safeguards the wide cut operating voltage.The self limiting type ribbon heater is during along the steel pipe radial arrangement, because electrical heat tracing pipe moulding, it is aging easily to adhere on steel pipe and the metallic foil adhesive tape, therefore when one section electric heating thermal insulation pipe breaks down, can radially extract the self limiting type ribbon heater and change, save the spending of changing the electric heating thermal insulation pipe for the user.

The utility model electric heating thermal insulation pipe is not limited to said structure, the steel pipe outer round surface radially can uniform PTC ribbon heater more than two, this PTC ribbon heater is a flat structure, all has being covered in its surperficial aluminium foil strip 3 and adhering to adhesive tape 5 on steel pipe 1 and the aluminium foil strip 3 of same structure this moment outside every self limiting type ribbon heater.PTC ribbon heater more than one or one also can spirally be wound in the steel pipe outer round surface, and this moment, the outer surface of ribbon heater was a thermal insulation layer.

Claims

1, a kind of electric heating thermal insulation pipe, comprise the thermal insulation layer (4) outside steel pipe (1), the steel pipe, the protective coating (6) of thermal insulation layer (4) outer surface, it is characterized in that: be provided with the PTC ribbon heater (2) that is attached at the whole length outer surface of steel pipe (1) between described steel pipe (1) and the thermal insulation layer (4).

2, a kind of electric heating thermal insulation pipe according to claim 1 is characterized in that: described spiral being wound on the steel pipe (1) in PTC ribbon heater that is attached at the whole length outer surface of steel pipe (1).

3, a kind of electric heating thermal insulation pipe according to claim 1, it is characterized in that: the described PTC ribbon heater (2) that is attached at the whole length outer surface of steel pipe (1) is along the steel pipe radial arrangement, and outer being disposed with in this PTC ribbon heater (2) is covered in its surperficial metallic foil and the adhesive tape (5) that adheres on steel pipe (1) and the metallic foil.

4, a kind of electric heating thermal insulation pipe according to claim 3 is characterized in that: described metallic foil is aluminium foil strip (3).