RU23356U1 - FLEXIBLE ELECTRIC HEATING DEVICE - Google Patents

Abstract

1. A flexible electric heating device containing at least one heating resistive element, electrical, heat and moisture insulation layers, characterized in that it contains a release layer fixed to the electrical insulation layer from the side opposite to the thermal insulation layer, and a heating resistive element made in the form of a multiwire wire with heat-resistant insulation and fixed to the insulating layer from the side bordering the insulating layer. 2. The device according to claim 1, characterized in that it comprises a temperature regulator, the temperature sensor of which is fixed in the zone of the heating resistive element between the insulating and insulating layers. The device according to claim 1, characterized in that it comprises a heat storage layer in contact with a heating resistive element or elements and located between the electrical insulating and thermal insulating layers. The device according to claim 1, characterized in that the heat and moisture insulation layers extend beyond the boundaries of the electrical insulation layer from two opposite sides and are provided with cords in these boundary zones. The device according to claim 1, characterized in that a heating resistive element made in the form of a multiwire wire with heat-resistant insulation is enclosed in a metal sheath-shield. The device according to claims 1 and 5, characterized in that the metal braiding screen is enclosed in an insulating tube.

Description

The utility model relates to heating means for domestic or industrial facilities, namely, predominantly formed in the field bandage-adhesive joints of fiberglass pipes when assembling them into the pipeline. The utility model is mainly intended for use when assembling lashes from individual fiberglass pipes and assembling from lashes of pipelines.

Known electric coating of small thickness, containing heat-insulating and heat-releasing layers and electrical resistors embedded between the trimmed layers (see French application No. 2609855, P 05 V 3/20; F 24 D 13/02; 32 V 7/00, 33 / 00; A 47 G 27/02; A 47 P 23/00).

The disadvantages of the known electric heating coating are low reliability, efficiency, fire and electrical safety.

A flexible electric heating device for heating freshly laid concrete is also known, containing heating elements pressed into the insulating layer, heat and moisture insulation layers (see A.S. USSR No. 1589432, H 05 V 3/34).

The known flexible electric heating device allows you to slightly increase the reliability and durability, although they remain not high enough, and in addition, its disadvantage is the difficulty or inability to use it when heating objects of a curved shape with small bend radii. The inventive utility model significantly improves reliability,

durability, fire and electrical safety, the cost-effectiveness of a flexible electric heating device in operation, expands its technological capabilities, and also facilitates the possibility of its installation on objects with curved surfaces of large curvature.

This is achieved by the fact that a flexible electric heating device containing a heat sink; the resistive element, electrical, heat and moisture insulation layers further comprises a release layer fixed to the electrical insulation layer from the side opposite to the insulation layer, and the heating resistive element is made in the form of a multi-wire with heat-resistant insulation and mounted on the insulating layer from the side bordering the insulating layer.

In addition, the flexible electric heating device may further comprise a temperature regulator, the temperature sensor of which is fixed in the zone of the heating resistive element between the insulating and insulating layers.

In addition, the flexible electric heating device may further comprise a heat storage layer in contact with the heating resistive element and located between the electrical insulating and thermal insulating layers.

In addition, the heat and moisture insulation layers can extend beyond the boundaries of the electrical insulation layer from two opposite sides and contain szfs in these edge zones.

In addition, the heating resistive element, made in the form of a multiwire wire with heat-resistant insulation, can be further enclosed in a metal braid screen.

In addition, the metal sheath-shield can be further enclosed in an insulating tube.

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2 nom layer on its outer side, protects the insulating layer

both from mechanical abrasion during frequent installation and removal on heated objects, and from sticking adhesive masses on it when using a device to heat the formed bandage-glue joint of fiberglass pipes to polymerize the adhesive, which eliminates the adhesion of the insulating layer to the heated object, its damage when removed from object and, as a result, increases the reliability and durability of a flexible electric heating device.

The implementation of the heating resistive element in the form of a multi-wire wire with heat-resistant insulation provides: high flexibility of the electric heating device as a whole, a large number of installations and removals of the device for heated objects without damage or rupture of the resistive element and, therefore, provides the possibility of using the device when heating objects with a curvilinear shape with small bending radius, and also increases its reliability and durability.

Fixing the heating resistive element on the insulating layer from the side bordering the insulating layer further protects it from possible mechanical damage and increases the fire and electrical safety of the flexible electric heating device.

Introduction to the design of a flexible electric heating device of a temperature regulator, the temperature sensor of which is fixed in the zone of a heating resistive element between the electrical and thermal insulation layers, eliminates overheating and increases the fire safety of the flexible electric heating device.

Introduction to the design of a flexible electric heating device of a heat storage layer in contact with a heating resistive element or elements and located between the electrical insulating and thermal insulation layers, expands the technolo.

3 gical possibilities of a flexible electric heating device

(it is possible to heat the flexible electric heating device separately from the object and then disconnect it from the power supply network, transfer it to the object and install it on it), provides more stable maintenance of the set temperature by it, reduces the number of on-off cycles of the thermostat and, accordingly, increases the reliability of the flexible electric heating devices.

The implementation of heat and moisture insulation layers extending beyond the boundaries of the insulating layer on two opposite sides and supplying cords in these edge zones allows radial pulling of the edge zones of the flexible electric heating device to the pipe when it is installed on the pipe brace and provides the most complete thermal insulation of the heated object, which reduces energy consumption and increases the efficiency of a flexible electric heating device.

The conclusion of the heating resistive element, made in the form of a multiwire wire with heat-resistant insulation, in a metal braid-screen, provides the possibility of grounding a flexible electric heating device when it is connected to the mains and, thereby, further increase its electrical safety.

The conclusion of the metal braid shield in the insulating tube eliminates moisture and corrosion on it, which ensures its durability and, accordingly, further increases the electrical safety and durability of the flexible electric heating device.

The inventive design allows you to create a flexible electric heating device that provides:

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- wide technological possibilities of application;

- high profitability, reliability, durability, fire electrical safety.

The essence of the design of a flexible electric heating device is illustrated by drawings, where:

In figures 1,4,7 depicts General views of a flexible electric heating device in variants of its design.

The figures 2,5,8 depict sections of a flexible electric heating device in the corresponding structural variants of its execution.

In figures 3,6,9 shows cross-sections of a heating resistive element in the corresponding structural variants of its execution.

The figure 10 shows the position of a flexible electric heating device mounted on a bandage-adhesive joint of fiberglass pipes.

A flexible electric heating device (Fig. 1, 2, 3) comprises a multi-wire wire with heat-resistant insulation, for example, MGTF 1x0.03 TU 16-505185-71, a heating resistive element 1 fixed with threads (not shown in the drawing) on a completed one, for example , from a piece of fabric “impregnated with silicone sealant U-4-21 OST 38.03238-81”, two-strand, insulating layer 2 on the side bordering, for example, made of non-woven material “Syntepon TU 21-087284-86, insulating layer 3. On the insulating layer 2 threads (in the drawing not cauldrons) there is fixed a release layer made of, for example, F4DM 1006 TU 301-05-422-89 varnish cloth 4. The outside layer of the heat-insulating layer 3 is bordered by, for example, a rubberized fabric TU 48-627164-82, a moisture-proof layer 5, which is connected threads (not shown) along the perimeter with electrical insulating 2 and anti-adhesive 4 layers. Heating resistive 5

element 1 contains a multi-wire core 6, protected by heat-resistant insulation 7, and is connected to a power cable 8.

A flexible electric heating device (Fig. 4,5,6) comprises a shielded stranded wire with heat-resistant insulation, for example, MGTFE 1x0.03 TU 16-505185-71, a heating resistive element 1, fixed with threads (not shown in the drawing) on the completed, for example, from a piece of fabric “impregnated with silicone sealant U-4-21 OST 38.03238-81”, two-strand, insulating layer 2 from the side bordering the made, for example, non-woven material “Syntepon TU 21-087284-86, insulating layer 3. On the insulating layer 2 threads ( not shown) is fixed made, for example, of varnish F4DM1006 TU 301-05-422-89, a release layer 4. On the outer side of the heat-insulating layer 3 is borne made, for example, of rubberized fabric TU 48-627164-82, a moisture insulation layer 5, which connected by threads (not shown) on the perimeter with electrical insulating 2 and anti-adhesive 4 layers. In addition, the flexible electric heating device comprises a temperature controller 9, for example, TAD-101 TU 311-0227450.097-94, the thermal sensor of which 10 is fixed in the zone of the heating resistive element 1 between the electrical insulation 2 and thermal insulation 3 layers. In addition, the flexible electric heating device comprises one of several insulated volumes filled with a heat storage substance, for example, ozokerite TU 141-0483550.07-93, a heat storage layer 11 in contact with a heating resistive element 1 and located between the electrical insulating 2 and thermal insulating 3 layers. The heating resistive element 1 contains a multi-wire core 6, protected by heat-resistant insulation 7, a metal braid-screen 12 and is connected to a power cable 8, equipped with a three-pole electrical connector 13 with an electrical or grounding or non-working zero electrical contact.

A flexible electric heating device (Figs. 7, 8, 9) contains a shielded stranded wire with heat-resistant insulation, for example, MGTFE 1x0.03 TU 16-505185-71, and a heating resistive element 1 enclosed in a fluoroplastic tube fixed with threads (not shown in the drawing shown) on a piece of fabric “impregnated with silicon-organic sealant U-4-21 OST 38.03238-81, made of, for example, two-thread, electrical insulating layer 2 from the side bordering that made, for example, of non-woven material“ Syntepon TU 21-087284-86, thermal insulating layer 3 On the electrical insulating layer 2 with threads (not shown in the drawing) there is fixed, for example made of varnish F4DM 1006 TUZO1-05-42289, a release layer 4. On the outside of the insulating layer 3 is bordered made, for example, from rubberized fabric TU 48-627164-82, moisture-proof layer 5, which is connected by threads (not shown in the drawing) around the perimeter with electrical insulation 2 and anti-adhesive 4 layers. In addition, the flexible electric heating device comprises a temperature controller 9, for example, TAD-101 TU 3110227450.097-94, the temperature sensor of which 10 is fixed in the zone of the heating resistive element 1 between the electrical insulation 2 and thermal insulation 3 layers. In addition, the flexible electric heating device comprises one of several filled with heat-accumulating material, for example, ozokerite TU 141-0483550.07-93, isolated volumes, heat storage) a layer 11 in contact with the heating resistive element 1 and located between the electrical insulating 2 and heat-insulating 3 layers. In addition, the flexible electric heating device is designed in such a way that the heat-insulating 3 and moisture-insulating 5 layers extend beyond the boundaries of the electric insulating layer 2 from two opposite sides and are provided with cords 14. The heating resistive element 1 contains a multi-wire core 6 protected by heat-resistant insulation 7, a metal sheath-screen 12, is enclosed in an electrical insulating, for example fluoroplastic, tube 15 and after electrical insulating, for example a fluoroplastic, tube 15 and subsequently through a thermoregulator trimmer 9 is connected to feeder cable 8, provided with a three-pole electric connector 13 with a grounding or zero on a non-vanishing electrical contact.

A flexible electric heating device (Fig. 1,2,3) works as follows: the device is placed on a heated object with contact through the release layer 4 (Fig. 2). Using the power cable 8 (Fig. 1), a flexible electric heating device is connected to a power source, after which the resistive element 1 (Figs. 1,2,3) generates heat and transfers it through electrical insulation 2 (Fig. 2) and anti-adhesive 4 (Fig. 1). 2) layers of the heated object. In this case, the heat-insulating layer 3 (Fig. 2) minimizes heat loss to the environment, and the moisture-insulating layer 5 (Fig. 1.2) eliminates moisture from entering the flexible electric heating device, its damage as a result of a possible short circuit, etc. After tasks, a flexible electric heating device is disconnected from the supply network and, if necessary, removed from the heated object.

A flexible electric heating device (Fig. 4,5,6) can operate according to two technological schemes.

Application Scheme No. 1: A flexible electric heating device is installed with a release layer 4 (Fig. 5) on a heated object. Using a power cable 8 (Fig. 4) and a three-pole electrical connector 13 (Fig. 4), a flexible electric heating device is connected to a power source equipped with a grounding terminal or a non-working zero contact, after which resistive element 1 (Figs. 4,5,6) generates heat and transfers it through the electrical insulation 2 (Fig. 5) and release 4 (Fig. 5) layers of the heated object, as well as the heat-accumulating layer 11. (Fig. 4,5). In this case, the heat-accumulating substance in the fluid-accumulating layer 11. (Fig. 4.5) is heated to its melting temperature and melts at

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this temperature, accumulating heat and not allowing the flexible electric heating device and the object heated by it to warm above this temperature. After the heat-accumulating substance is melted, the temperature controller 9 (Fig. 4.5), pre-set to the appropriate temperature, is activated from the temperature sensor 10 (Fig. 4) and disconnects the heating resistive element 1 (Fig. 4,5,6) from the power source. Further, the process of heating the object proceeds due to the thermal energy accumulated in the heat storage layer 11 (Fig. 4,5). In this case, the heat-insulating layer 3 (Fig. 5) minimizes heat loss to the environment, and the moisture-insulating layer 5 (Fig. 4.5) eliminates moisture from entering the flexible electric heating device, its damage as a result of a possible short circuit, etc. After crystallization the heat-accumulating substance is again triggered by the temperature controller 9 (Fig. 4,5) and the whole process, if necessary, can be repeated again. After the task is completed, the flexible electric heating device is disconnected from the supply network and, if necessary, removed from the heated object.

Application Scheme No. 2 (used in cases where there is no power source near the heated object): A flexible electric heating device is transported to the power source, roll it into a roll with a release layer 4 (Fig. 5) inside, using a power cable 8 (Fig. 4) and a three-pole electric connector 13, a flexible electric heating device is connected to a power source equipped with a grounding or a non-working zero contact, after which the resistive element 1 (Fig. 4,5,6) generates heat and It gives its heat storage layer 11. (fig.4,5). In this case, the heat-accumulating substance in the heat-accumulating layer 11. (Fig. 4.5) is heated to its melting temperature and melts at this temperature, accumulating heat and not allowing the flexible electric heating device to heat above this temperature. After the melting of the heat-accumulating substance JOCH lОOOO f 9 ывает is triggered by the temperature sensor 10 (Fig. 4) the temperature controller 9

(Fig. 4,5), pre-configured to the appropriate temperature, and disconnects the heating resistive element 1 (Figs. 4,5,6) from the power source. A flexible electric heating device is disconnected from the power source, transported to the heated object and installed on it with its release layer 4 (figure 5). Next, the process of heating the object proceeds due to the thermal energy accumulated in the heat-accumulating layer And (Fig. 4,5). In this case, the heat-insulating layer 3 (Fig. 5) minimizes heat loss to the environment during transportation of the flexible electric heating device and its operation on the heated object to a minimum, and the moisture-insulating layer 5 (Fig. 4.5) eliminates the ingress of moisture inside the flexible electric heating device and its spoilage. After crystallization of the heat storage substance and cooling of the flexible electric heating device, the whole process, if necessary, can be repeated first.

A flexible electric heating device (Figs. 7, 8, 9) can operate according to two technological schemes.

Application Scheme No. 1: A flexible electric heating device is installed with a release layer 4 (Fig. 8) on a bandage-adhesive joint of fiberglass pipes 16 formed in the field (Fig. 10). In this case, the marginal zones of heat-insulating 3 (Fig. 8,10) and moisture-insulating 5 (Fig. 7,8,10) layers are tightened tightly to the pipe using the cords 14 (Fig. 7,10) as shown in FIG. 10, which ensures the maximum reduction of heat loss to the environment during operation of a flexible electric heating device and increases its efficiency. Using a power cable 8 (Fig. 7) and a three-pole electrical connector 13 (Fig. 7), a flexible electric heating device is connected to a power source equipped with a grounding terminal or a non-working zero contact, followed by a resistive element 1 (Figs. 8, 9, 10) generates heat and transfers it through

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10 electrical insulating 2 (Fig. 8,10) and anti-adhesive 4 (Fig. 8,10) layers of the bond-adhesive joint of the fiberglass pipes 16 (Fig. 10), as well as the heat-accumulating layer 11. (Figs. 7, 8, 10). In this case, the heat-accumulating substance in the heat-accumulating layer 11. (Figs. 7, 8, 10) is heated to the temperature of its melting and melts at this temperature, accumulating heat and not allowing the flexible electric heating device and the object heated by it to heat above this temperature. After the heat-accumulating substance is melted, the temperature controller 9 (Figs. 7, 8, 10), pre-set to the appropriate temperature, is activated from the temperature sensor 10 (Fig. 7), and disconnects the heating resistive element 1 (Figs. 8, 9, 10) from the power source. Next, the heating process of the bond-glue joint of the fiberglass pipes 16 (Fig. 10) proceeds due to the thermal energy accumulated in the heat-accumulating layer 11 (Figs. 7, 8, 10). In this case, the heat-insulating layer 3 (Figs. 8, 10) minimizes heat loss to the environment, and the moisture-insulating layer 5 (Figs. 7, 8, 10) eliminates the ingress of moisture into the flexible electric heating device, its damage as a result of a possible short circuit, and etc. After the complete crystallization of the heat-accumulating substance and lowering its temperature, the temperature regulator 9 again activates (Fig. 7, 8, 10) and the whole process, if necessary, can be repeated again. After completing the task (completion of the polymerization of glue in the bond-glue joint), the flexible electric heating device is disconnected from the supply network and removed from the heated object. Application Scheme No. 2 (used in cases where there is no power source near the field-mounted pipe): A flexible electric heating device is transported to a power source (usually a construction trailer “change house”), roll it into a roll with a release layer 4 (Fig. 8,) ) Ary, using a power cable 8 (Fig. 4) and a three-pole electrical connector 13 (Fig. 7), a flexible electric heating device gJ l} OOOOOOCH 11 is connected to a power source equipped with a ground

or a non-working zero contact, after which the resistive element 1 (Fig. 8.9) generates heat and transfers it to the heat storage layer 11. (Fig. 7.8). At the same time, the fluid accumulating substance in the heat-accumulating layer 11. (Fig. 7.8) is heated to its melting temperature and melts at this temperature, accumulating heat and not allowing the flexible electric heating device to heat above this temperature. After the heat-accumulating substance is melted, the temperature regulator 9 (Fig. 7.8), pre-configured for the corresponding TEMPU, is activated from the temperature sensor 10 (Fig. 7) and disconnects the heating resistive element 1 (Fig. 7, 8, 9) from the power source. A flexible electric heating device is disconnected from the power source, transported to the pipe being mounted and installed on the adhesive-bond joint of the fiberglass pipes 16 (Fig. 10) with its release layer 4 (Fig. 8,10). Next, the heating process of the bond-glue joint proceeds due to the thermal energy accumulated in the heat storage layer 11 (Figs. 7, 8, 10). In this case, the heat-insulating layer 3 (Fig. 8,10) minimizes heat loss to the environment during transportation of the flexible electric heating device and its operation on the heated bandage-glue joint to a minimum, and the moisture-insulating layer 5 (Figs. 7, 8, 10) eliminates the hit moisture inside the flexible electric heating device and its damage. After crystallization of the heat storage substance and cooling of the flexible electric heating device, the whole process, if necessary, can be repeated first.

The implementation of a flexible electric heating device in accordance with the claimed utility model broadens the scope of its application, in particular, allows it to be used for forming bond-adhesive joints of fiberglass pipes in the field, and also extends its technological capabilities: allows use WWV tbOO 12

use it both for heating objects with curved surfaces of large curvature, and for heating objects directly near which there is no power source.

Applicant authors :( / / B.M. Rudakov

S.A. Lykov

Claims (6)

1. A flexible electric heating device containing at least one heating resistive element, electrical, heat and moisture insulation layers, characterized in that it contains a release layer fixed to the electrical insulation layer from the side opposite to the thermal insulation layer, and a heating resistive element It is made in the form of a multiwire wire with heat-resistant insulation and is fixed on the insulating layer from the side bordering the heat-insulating layer.  2. The device according to p. 1, characterized in that it contains a temperature regulator, the temperature sensor of which is fixed in the zone of the heating resistive element between the insulating and insulating layers.  3. The device according to claim 1, characterized in that it contains a heat storage layer in contact with a heating resistive element or elements and located between the insulating and insulating layers.  4. The device according to claim 1, characterized in that the heat and moisture insulation layers extend beyond the boundaries of the electrical insulation layer from two opposite sides and are provided with cords in these boundary zones.  5. The device according to claim 1, characterized in that a heating resistive element made in the form of a multi-wire wire with heat-resistant insulation is enclosed in a metal braid-screen. 6. The device according to claims 1 and 5, characterized in that the metal braid screen is enclosed in an insulating tube.