CN111526619A

CN111526619A - Self-temperature-limiting electric tracing band

Info

Publication number: CN111526619A
Application number: CN202010353624.7A
Authority: CN
Inventors: 李贻连; 卜基峰; 姚月凤
Original assignee: Anbang Electric Group Co ltd
Current assignee: Anbang Electric Group Co ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-08-11

Abstract

The invention provides a self-temperature-limiting electric tracing band which comprises two buses arranged in parallel, a PTC heating core layer wrapping and connecting the two buses, and a heat conduction insulating layer, a tinned copper wire braid layer and a sheath layer sequentially wrapping the PTC heating core layer from inside to outside, wherein the PTC heating core layer is in a runway shape, the middle part of one side of the PTC heating core layer between the two buses is inwards sunken to form an arc-shaped through groove, the arc-shaped through groove extends along the length direction of the PTC heating core layer, an arc-shaped filling strip is filled in the arc-shaped through groove, and the arc-shaped filling strip is provided with a buffering through groove extending along the length direction of the PTC heating core. According to the invention, the self-temperature-limiting electric tracing band can be bent to form an arc shape when contacting with the pipe body or the oil tank by arranging the arc-shaped filling strip and the buffer through groove, so that the contact area with the pipe body or the oil tank is increased, and the heat tracing efficiency and the heat tracing effect of the self-temperature-limiting electric tracing band are improved.

Description

Self-temperature-limiting electric tracing band

Technical Field

The invention relates to the technical field of electric tracing bands, in particular to a self-temperature-limiting electric tracing band.

Background

The self-limiting temperature heat tracing cable is a new generation of unique strip-shaped constant temperature electric heater. The electrical resistivity of the heating elements has very high Positive Temperature coefficient PTC (Positive Temperature coefficient) and are connected in parallel with each other. The temperature of the heated body can be automatically limited, the output power can be automatically adjusted along with the temperature of the heated body without any additional equipment, and the device has wide application in the production, processing and other departments of petroleum, chemical industry, electric power, metallurgy, light industry, food, refrigeration, building, gas, agricultural and sideline products.

The self-limiting electric tracing band in the prior art is usually wound on the outer surface of a pipeline or a tank body when in use, the contact area between the self-limiting electric tracing band and the pipeline or the tank body is small, so that the heat transfer efficiency between the electric tracing band and the pipeline or the tank body is low, the heat tracing effect is poor, and the surfaces of the self-limiting electric tracing band which are not in contact with the pipeline or the tank body are exposed in the air, so that a large amount of heat loss is caused.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a self-temperature-limiting electric tracing band.

The invention provides a self-temperature-limiting electric tracing band which comprises two buses, a PTC heating core layer, a heat conduction insulating layer, a tinned copper wire braid layer and a sheath layer, wherein the two buses are arranged in parallel, the PTC heating core layer wraps and connects the two buses, and the heat conduction insulating layer, the tinned copper wire braid layer and the sheath layer are sequentially wrapped on the PTC heating core layer from inside to outside;

PTC generates heat the sandwich layer and is the runway shape, and the PTC that is located between two generating lines generates heat one side middle part of sandwich layer inwards caves in and forms the arc and leads to the groove, and the arc leads to the groove and extends along PTC heating sandwich layer length direction, and the arc leads to the inslot and is filled with the arc filler strip, and the arc filler strip is seted up and is led to the groove along the buffering that PTC heating sandwich layer length direction extends.

Preferably, still including the insulating layer of parcel in the restrictive coating outside, the insulating layer has seted up jaggedly with arc filler strip correspondence department, and insulating layer breach department and restrictive coating correspond the department and flush.

Preferably, still including the enhancement restrictive coating of parcel in the insulating layer outside, strengthen restrictive coating and offer jaggedly with the insulating layer breach department of correspondence, strengthen restrictive coating breach department and flush with insulating layer breach department.

Preferably, the outer surface of the reinforcing sheath layer is provided with positioning grooves at intervals along the length direction.

Preferably, insulating layer and enhancement restrictive coating structure as an organic whole, an organic whole structure is fixed with the restrictive coating joint.

Preferably, the bus bar includes a tensile strand and a wire helically wound along the tensile strand.

Preferably, the thermally conductive and insulating layer comprises an alkali-free glass fiber cloth woven layer and/or a mica tape wrapped layer.

According to the invention, the self-temperature-limiting electric tracing band can be bent to form an arc shape when contacting with the pipe body or the oil tank by arranging the arc-shaped filling strip and the buffer through groove, so that the contact area with the pipe body or the oil tank is increased, and the heat tracing efficiency and the heat tracing effect of the self-temperature-limiting electric tracing band are improved.

Drawings

Fig. 1 is a schematic structural view of a self-temperature-limiting electric tracing band according to the present invention.

Description of reference numerals:

1-bus bar 2-arc filling bar 3-PTC heating core layer 4-heat conducting insulating layer

5-tinned copper wire braid layer 6-sheath layer 7-thermal insulation layer 8-reinforced sheath layer

Detailed Description

Referring to fig. 1, the self-temperature-limiting electric tracing band provided by the invention comprises two buses 1 arranged in parallel, a PTC heating core layer 3 wrapping and connecting the two buses 1, and a heat conduction insulating layer 4, a tinned copper wire braid layer 5 and a sheath layer 6 sequentially wrapping the PTC heating core layer 3 from inside to outside;

PTC generates heat sandwich layer 3 and is the runway shape, and the PTC that is located between two generating lines 1 generates heat one side middle part of sandwich layer 3 inwards caves in and forms the arc and leads to the groove, and the arc leads to the groove and extends along PTC heating sandwich layer 3 length direction, and the arc leads to the inslot to be filled with arc filler strip 2, and arc filler strip 2 sets up the buffering that extends along PTC heating sandwich layer 3 length direction and leads to the groove.

According to the invention, the self-temperature-limiting electric tracing band can be bent to form an arc shape when contacting with the pipe body or the oil tank by arranging the arc-shaped filling strip 2 and the buffer through groove, so that the contact area with the pipe body or the oil tank is increased, and the heat tracing efficiency and the heat tracing effect of the self-temperature-limiting electric tracing band are improved.

In order to reduce heat loss, in this embodiment, still include the insulating layer 7 of parcel in the restrictive coating 6 outside, insulating layer 7 has seted up jaggedly with arc filler strip 2 corresponding department, and 7 breach departments of insulating layer level with restrictive coating 6 corresponding department.

In order to protect insulating layer 7, in this embodiment, still including the enhancement restrictive coating 8 of parcel in the insulating layer 7 outside, strengthen restrictive coating 8 and the 7 breach of insulating layer and correspond the department and seted up the breach, strengthen 8 breach departments of restrictive coating and flush with 7 breach departments of insulating layer.

In order to fix the self-temperature-limiting electric tracing band and the pipe body or the oil pipe conveniently, in the embodiment, the outer surface of the reinforcing sheath layer 8 is provided with positioning grooves at intervals along the length direction.

In order to facilitate installation insulating layer 7 and enhancement restrictive coating 8 on restrictive coating 6 convenient and fast ground as required, in this embodiment, insulating layer 7 and enhancement restrictive coating 8 structure as an organic whole, integrative structure is fixed with 6 joints of restrictive coating.

In order to improve the stretch resistance of the self-temperature-limiting electric tracing band, in the present embodiment, the bus bar 1 includes a stretch resistant rope and a wire spirally wound along the stretch resistant rope.

In order to have high temperature resistance and thermal conductivity while having excellent insulation properties, in the present embodiment, the thermal insulation layer 4 includes an alkali-free glass fiber cloth woven layer and/or a mica tape wrapped layer.

In the present embodiment, the arc-shaped filling bar 2 is made of an elastic heat-conducting material.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A self-temperature-limiting electric tracing band is characterized by comprising two buses (1) which are arranged in parallel, a PTC heating core layer (3) which is used for wrapping and connecting the two buses (1), and a heat conduction insulating layer (4), a tinned copper wire braid layer (5) and a sheath layer (6) which are sequentially wrapped on the PTC heating core layer (3) from inside to outside;

PTC generates heat sandwich layer (3) and is the runway shape, and the PTC that is located between two generating lines (1) generates heat one side middle part of sandwich layer (3) and inwards caves in and form the arc and lead to the groove, and the arc leads to the groove and extends along PTC heating sandwich layer (3) length direction, and the arc leads to the inslot and is filled arc packing strip (2), and arc packing strip (2) are seted up and are led to the groove along the PTC buffering that heating sandwich layer (3) length direction extends.

2. The self-temperature-limiting electric tracing band according to claim 1, further comprising a heat insulating layer (7) wrapped outside the sheath layer (6), wherein a gap is formed at a position where the heat insulating layer (7) corresponds to the arc-shaped filling strip (2), and the gap of the heat insulating layer (7) is flush with a position where the sheath layer (6) corresponds.

3. The self-temperature-limiting electric tracing band according to claim 2, further comprising a reinforcing sheath layer (8) wrapped outside the heat-insulating layer (7), wherein a notch is formed at a position of the reinforcing sheath layer (8) corresponding to the notch of the heat-insulating layer (7), and the notch of the reinforcing sheath layer (8) is flush with the notch of the heat-insulating layer (7).

4. A self-limiting temperature electric tracing band according to claim 3, wherein the outer surface of the reinforcing sheath layer (8) is provided with positioning grooves at intervals along the length direction.

5. The self-temperature-limiting electric tracing band according to claim 3, wherein the heat-insulating layer (7) and the reinforcing sheath layer (8) are of an integral structure, and the integral structure is clamped and fixed with the sheath layer (6).

6. A self-limiting temperature electric tracing band according to any one of claims 1 to 5, wherein the bus bar (1) comprises a tensile cord and a wire spirally wound along the tensile cord.

7. A self-limiting electric tracing ribbon according to claim 6, wherein the heat-conducting insulating layer (4) comprises an alkali-free glass fiber cloth braid and/or a mica tape wrapping layer.