CN212851046U

CN212851046U - Resistance to compression type is from limit for temperature heating band

Info

Publication number: CN212851046U
Application number: CN202022078597.5U
Authority: CN
Inventors: 姚秋平; 何健
Original assignee: Suzhou Jianjincheng Electrical Accessories Co ltd
Current assignee: Suzhou Jianjincheng Electrical Accessories Co ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-03-30
Anticipated expiration: 2030-09-21

Abstract

The utility model relates to an electric heat belt technical field specifically is a resistance to compression type is from limit for temperature heating area, including two heart yearns, two respectively the cover locate two outer heart yearn insulation cover of heart yearn line, both ends respectively with the PTC heat-generating body of two heart yearns looks butt, and the insulating sheath of crowded package outside two heart yearn insulation cover, the U-shaped groove has been seted up to the one end that is close to the PTC heat-generating body on the heart yearn insulation cover, integrated into one piece has the circular arc concave piece identical with the outer wall of heart yearn on the PTC heat-generating body, circular arc concave piece runs through behind the U-shaped groove with heart yearn looks butt, it has heat conduction packing strip to keep away from between the both ends of heart. The utility model discloses a design circular arc concave piece dispersion external force has improved the area of contact and the compressive capacity of PTC heat-generating body and heart yearn to the squeezing action of heart yearn, and then has improved the wholeness and the compactness of heating band.

Description

Resistance to compression type is from limit for temperature heating band

Technical Field

The utility model relates to an electric heat belt technical field specifically is a resistance to compression type is from limit for temperature heating tape.

Background

The self-temperature-limiting heating belt is a special cable which generates heat after being heated by electric energy, and is widely applied to various fields at present. The electric heating element of the self-temperature-limiting heating belt is a core belt which is formed by uniformly extruding a layer of semiconductor PTC material with positive temperature coefficient between two parallel metal buses. When two buses at one end of the cable are connected with a power supply, current transversely flows through the PTC material from one bus to the other bus, and the PTC material is a resistance heating body continuously connected in parallel between the buses, so that electric energy is converted into heat energy, and the heat tracing and heat preservation are carried out on an operating system. The resistance of the core belt increases along with the temperature rise, and reaches a high resistance area, the resistance is so large as to almost block current, and the temperature of the core belt reaches a high limit and does not rise any more, but automatically limits the temperature.

At present, the self-temperature-limiting heating belt has poor pressure resistance, is bent and laid on a plane, and is easy to deform and damage under the action of pressure from the upper part, so that the service life of the self-temperature-limiting heating belt is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a resistance to compression type is from limit for temperature heating band to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a resistance to compression type is from limit for temperature heating band, includes two heart yearns, and two are overlapped respectively and are located two the outer heart yearn insulating sleeve of heart yearn, both ends respectively with two the PTC heat-generating body of heart yearn looks butt to and crowded package in two the outer insulating sheath of heart yearn insulating sleeve, be close to on the heart yearn insulating sleeve the U-shaped groove has been seted up to the one end of PTC heat-generating body, integrated into one piece have on the PTC heat-generating body with the identical circular arc concave block of outer wall of heart yearn, circular arc concave block runs through with heart yearn looks butt behind the U-shaped groove, keep away from on the PTC heat-generating body the both ends of heart yearn with it has the heat conduction to.

Optionally, transition circle processing is performed on the connection position of one end of the PTC heating body, which is close to the heat conducting filling strip, and the arc concave block.

Optionally, the heat-conducting filling strip is made of silicon rubber by pouring; the longitudinal section of the cavity is any one of rectangular, circular and runway-shaped.

Optionally, the insulating sheath is externally extruded with a braided shield, the braided shield is externally extruded with a polyolefin outer sheath, and the outer surface of the polyolefin outer sheath is coated with a high-temperature-resistant anticorrosive coating.

Optionally, the braided shield comprises a tube cage body formed by braiding a tinned soft copper wire or an aluminum-magnesium alloy wire in a net shape, the surface of the braided shield is coated with an anti-oxidation coating, and the braided shield is grounded.

Optionally, a tooth socket is formed in one end, abutted to the insulating sheath, of the outer wall of the core wire insulating sleeve, and a rack matched with the tooth socket is integrally formed on the inner wall of the insulating sheath.

Compared with the prior art, the utility model provides a resistance to compression type is from limit for temperature heating band possesses following beneficial effect:

1. the utility model improves the contact area and the compression resistance of the PTC heating element and the core wire by designing the extrusion action of the arc concave block to the core wire, further improves the integrity and the compactness of the heating belt, and provides a space for the deformation of the heat-conducting filling strip by designing the unique runway-shaped cavity, so that the heat transfer efficiency of the PTC heating element to the insulating sheath is improved and the heating efficiency of the heating belt is improved on the premise that the heat-conducting filling strip does not influence the bending of the heating belt;

2. the utility model discloses a tooth's socket and rack form meshing cup joint structure between insulating cover of heart yearn and the insulating sheath for the insulating cover of heart yearn is connected closely with the insulating sheath, is difficult to take place the pine to take off between insulating cover of heart yearn and the insulating sheath.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: 1, a core wire; 2, insulating sleeve of core wire; 3 a heating element; 4U-shaped grooves; 5, arc concave blocks; 6 heat conducting filling strips; 7 a cavity; 8, insulating a sheath; 9 weaving a shield; 10 a polyolefin outer jacket; 11 rack bar.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b): referring to fig. 1, the present invention provides a compression-resistant self-temperature-limiting heating belt, which comprises two core wires 1, two core wire insulating sleeves 2 respectively sleeved outside the two core wires 1, a PTC heating element 3 with two ends respectively abutting against the two core wires 1, and an insulating sheath 8 extruded outside the two core wire insulating sleeves 2. A U-shaped groove 4 is formed in one end, close to the PTC heating element 3, of the core wire insulating sleeve 2, an arc concave block 5 matched with the outer wall of the core wire 1 is integrally formed on the PTC heating element 3, the arc concave block 5 penetrates through the U-shaped groove 4 and then is abutted to the core wire 1, and transition circle processing is conducted on the connecting portion, close to the heat conducting filling strip 6, of one end of the PTC heating element 3 and the arc concave block 5. The PTC heating element 3 is filled with a heat-conducting filling strip 6 between the two ends far away from the core wire 1 and the insulating sheath 8, the heat-conducting filling strip 6 is made of silicon rubber by casting, a cavity 7 parallel to the length direction of the PTC heating element 3 is formed in the heat-conducting filling strip 6, and the longitudinal section of the cavity 7 is in a track shape.

PTC heat-generating body 3 is through the extrusion of 5 dispersion external forces of design circular arc concave pieces to heart yearn 1, the contact area and the compressive capacity of PTC heat-generating body 3 with heart yearn 1 have been improved, and then the wholeness and the compactness of heat band have been improved, and through designing unique runway shape cavity 7, for 6 deformations of heat conduction filling strip provide the space, make under the crooked prerequisite of heat band is not influenced to heat conduction filling strip 6, PTC heat-generating body 3 has been improved to the heat transfer efficiency of insulating sheath 8, the heating efficiency of heat band has been improved.

Tooth's socket has been seted up with the one end of 8 looks butt of insulating sheath on the outer wall of heart yearn insulating boot 2, and an organic whole is to have rack 11 identical with the tooth's socket on the inner wall of insulating sheath 8, through tooth's socket and rack 11, forms the meshing cup joint structure between heart yearn insulating boot 2 and the insulating sheath 8 for heart yearn insulating boot 2 and insulating sheath 8 are connected closely, are difficult to take place the pine between heart yearn insulating boot 2 and the insulating sheath 8 and take off.

The insulating sheath 8 is externally extruded with a braided shield 9, the braided shield 9 is a tube cage-shaped body formed by weaving an aluminum-magnesium alloy wire in a net shape, and the core wire 1 has a good maintenance effect, so that the heating belt has strong toughness. The surface of the braided shield 9 is coated with the anti-oxidation coating, and the braided shield 9 is connected with the junction box for grounding, so that the abnormal condition that the joint part is ignited can be avoided, and the effect of grounding maintenance is achieved. The braided shield 9 is externally extruded with a polyolefin outer sheath 10, and the outer surface of the polyolefin outer sheath 10 is coated with a high-temperature resistant anticorrosive coating.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a resistance to compression type is from limit for temperature heating area, includes two heart yearns (1), and two are respectively overlapped and are located two the outer insulating cover of heart yearn (1) (2), both ends respectively with two PTC heat-generating body (3) of heart yearn (1) looks butt to and crowded package in two insulating sheath (8) outside the insulating cover of heart yearn (2), its characterized in that: be close to on heart yearn insulating cover (2) U-shaped groove (4) have been seted up to the one end of PTC heat-generating body (3), integrated into one piece have on PTC heat-generating body (3) with identical circular arc concave (5) of the outer wall of heart yearn (1), circular arc concave (5) run through with heart yearn (1) looks butt behind U-shaped groove (4), keep away from on PTC heat-generating body (3) the both ends of heart yearn (1) with it fills strip (6) to fill between insulating sheath (8), it is on a parallel with to seted up in heat conduction fills strip (6) cavity (7) of the length direction of PTC heat-generating body (3).

2. The pressure-resistant self-limiting temperature heating belt according to claim 1, characterized in that: and the joint of one end of the PTC heating body (3) close to the heat-conducting filling strip (6) and the arc concave block (5) is subjected to transition circle treatment.

3. The pressure-resistant self-limiting temperature heating belt according to claim 1, characterized in that: the heat-conducting filling strips (6) are made of silicon rubber by pouring; the longitudinal section of the cavity (7) is any one of a rectangle, a circle and a runway.

4. The pressure-resistant self-limiting temperature heating belt according to claim 1, characterized in that: the insulating sheath (8) is externally extruded with a braided shield (9), the braided shield (9) is externally extruded with a polyolefin outer sheath (10), and the outer surface of the polyolefin outer sheath (10) is coated with a high-temperature-resistant anticorrosive coating.

5. The pressure-resistant self-limiting temperature heating belt according to claim 4, characterized in that: the braided shield (9) comprises a tube cage body formed by braiding tinned soft copper wires or aluminum-magnesium alloy wires in a net shape, wherein the surface of the braided shield (9) is coated with an anti-oxidation coating, and the braided shield (9) is grounded.

6. The pressure-resistant self-limiting temperature heating belt according to claim 1, characterized in that: a tooth groove is formed in one end, abutted to the insulating sheath (8), of the outer wall of the core wire insulating sleeve (2), and a rack (11) matched with the tooth groove is integrally formed in the inner wall of the insulating sheath (8).