CN202791116U - Constant power heating hose - Google Patents

Abstract

The utility model discloses a constant power heating hose, including a hose body, characterized in that: a heating layer is arranged in the tube wall of the hose body, and at least one group of power lines are arranged along the center line direction of the tube cavity of the hose body and in the middle of the heating layer or on the heating layer, and are continuously wound in the same winding direction and at the same spacing, and at least one group of heating wires are continuously wound at equal intervals along the intersecting direction, and the power lines are composed of a "zero" line and a "live" line. The utility model can realize the long-distance transportation of the heating hose, and at the same time reduce the current situation of multiple specifications during production and preparation, and reduce the production cost.

Description

Constant power heating hose

technical field

The utility model relates to the technical field of conveying hoses, in particular to a technology for electrically heating constant power heating hoses.

Background technique

There are many commonly used hoses at present, and they are generally used to transport natural gas or water. It often does not play the role of transportation, such as: crude oil, asphalt, candy, so at this time, it is necessary to heat the conveying pipe to make the inside of the conveying hose have a certain temperature, so that the material can be successfully conveyed. Commonly used There are several kinds of heating methods: heating with steam interlayer hard tube, winding heating wire on the hose, etc., but these methods will cause a lot of energy waste, and temperature instability, and will cause certain safety hazards. Performance is extremely unstable. There is no way to accurately control the heating power of the delivery pipe in the existing method, which will lead to the need to reserve heating tapes of various specifications to meet the needs of various power equipment when producing heat tracing hoses. In addition, because the heating voltage of most equipment is constant, when using the heating wire to heat, according to the power calculation formula P=U2/R, the output value of the voltage is constant, the longer the hose, the resistance R of the heating wire will be The larger the heating power is, the smaller the heating power will be. Therefore, this method is not suitable for long-distance transmission.

Contents of the invention

The purpose of the utility model is to provide a constant power heat tracing hose, which can realize the long-distance transportation of the heat tracing hose, and at the same time reduce the current situation of multiple specifications during production and preparation, and reduce the manufacturing cost.

Realize below through following technical scheme:

A constant power heating hose, comprising a hose body, characterized in that: a heating layer is provided in the tube wall of the hose body, and at least A set of power cords is continuously wound in the same direction, and at least one set of heating wires is arranged along the centerline of the lumen of the hose body and inside the heating layer, and is continuously wound in the same direction. intersect.

The spacing is the same separation distance.

The power line is composed of a "zero" line and a "live" line.

The "zero" line and the "fire" line are arranged in one set, or two sets, or more than three sets.

The tube wall structure of the hose body is that a temperature-resistant layer, a pressure-resistant layer, a first insulating layer, the heating layer, a second insulating layer and a thermal insulation protection layer are sequentially arranged from the lumen outward.

Compared with the prior art, the utility model has the following advantages.

Through the technical solution of the utility model, the structure of the constant power heat tracing hose described in the utility model from inside to outside is: temperature-resistant layer, pressure-resistant layer, first insulating layer, heating layer, second insulating layer and heat preservation protection layer. The heating layer of the constant power heating hose described in the utility model adopts the technology of weaving mesh, that is, one or more groups of power lines such as "zero" line and "fire" line are continuously woven on the heating layer according to the same winding direction and the same distance In addition, one or more groups of heating wires are continuously wound on the heating layer at equal intervals in the direction intersecting with the "zero" and "hot" wires. After weaving in this way, between one group of "zero" and "hot" wires, There will be a section of heating wire connected to the "zero" and "fire" line, which will generate heat after the current is turned on. This section is called the heating unit 10. The resistance of the heating wire of the heating unit 10 can be set, and the heating unit on the heating layer We can also control the interval between 10, and set the same interval, so that constant power heating can be achieved. At the same time, according to the formula P=U2/R, the resistance R is constant. In the parallel circuit, as long as the total current does not exceed the limit, long-distance heat tracing transmission can be realized under the low voltage U. At the same time, it can also make the heat tracing hose more adaptable to the equipment, as long as the heat tracing hose is compatible with the normal working voltage. It can be seen that the constant power heating hose described in the utility model can realize the long-distance transportation of the heating hose, reduce the current situation of multiple specifications during production and material preparation, and reduce the manufacturing cost.

Description of drawings

Fig. 1 is a perspective view of the utility model constant power heating hose;

Fig. 2 is a side view of the utility model constant power heating hose.

Detailed ways

The constant power heating hose of the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Fig. 1 and Fig. 2, the constant power heating hose of the present invention includes a hose body, and a heating layer 4 is arranged in the tube wall of the hose body, along the direction of the centerline of the lumen of the hose body and on the heating layer Above, there is at least one set of power cords and they are continuously wound in the same winding direction and at the same distance, and at least one set of heating wires 9 are continuously wound at equal intervals along the intersecting direction, and the heating wires 9 intersect with the power cords. Make the heating wire 9 apply current through the power line to conduct heat. The power line is made of "zero" line 7 and "fire" line 8. The power line, that is, the "zero" line and the "fire" line are provided with one group, or two groups, or more than three groups. The tube wall structure of the hose body is: from the lumen to the outside, that is, from the inside to the outside, it is sequentially arranged as a temperature-resistant layer 1, a pressure-resistant layer 2, a first insulating layer 3, a heating layer 4, a second insulating layer 5 and heat preservation protection. Layer 6.

It is described in more detail below:

The constant power heating hose described in this utility model adopts the technology of textile mesh in the middle of the heating layer 4 or above the heating layer 4, that is, one or more groups of power supply "zero" and "hot" wires are wound in the same winding direction , the same pitch is continuously wound on the heating layer. In addition, one or more groups of heating wires are continuously wound on the heating layer at equal intervals in the direction intersecting with the "zero" and "hot" wires. Between the "hot" wires, there will be a heating wire connected to the "zero" and "hot" wires, which will generate heat after the current is turned on. This section is called the heating unit 10, and the heating wire resistance of the heating unit 10 can be set. Moreover, we can also control the intervals between the heating units 10 on the heating layer, and set the intervals to be the same, so that constant power heating can be realized. At the same time, according to the formula P=U2/R, the resistance R is constant. In the parallel circuit, as long as the current does not exceed the limit, long-distance heat tracing transmission can be realized under the low voltage U. At the same time, it can also make the heat tracing hose more adaptable to the equipment, as long as the heat tracing hose is compatible with the normal working voltage. It can be seen that the constant power heating hose described in the utility model can realize the long-distance transportation of the heating hose, reduce the current situation of multiple specifications during production and material preparation, and reduce the manufacturing cost.

Claims (5)

1. A constant power heat tracing hose, comprising a hose body, characterized in that: a heating layer is provided in the tube wall of the hose body, and a heating layer is arranged along the centerline direction of the lumen of the hose body and inside the heating layer. There are at least one set of power cords and they are continuously wound at intervals in the same direction, and at least one set of heating wires are arranged along the centerline of the lumen of the hose body and inside the heating layer and are continuously wound at intervals in the same direction. Power lines intersect. 2. The constant power heating hose according to claim 1, characterized in that: the distances are the same distance. 3. The constant power heating hose according to claim 2, characterized in that: the power line is composed of a "zero" line and a "hot" line. 4. The constant power heating hose according to claim 3, characterized in that there are one set, two sets, or more than three sets of the "zero" line and the "hot" line. 5. The constant power heating hose according to claim 1 or 2 or 3 or 4, characterized in that: the wall structure of the hose body is that a temperature-resistant layer and a pressure-resistant layer are sequentially arranged from the lumen to the outside , the first insulating layer, the heating layer, the second insulating layer and the thermal insulation protection layer.

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