Electric tracing pipe

Abstract

The utility model provides an electric tracing pipe which comprises a steel pipe and an electric tracing band, a coating layer is arranged outside the steel pipe, the electric tracing band is arranged outside the coating layer, a heat preservation layer is arranged outside the electric tracing band and the coating layer, and a sheath layer is arranged outside the heat preservation layer. The coating layer is arranged between the steel pipe and the electric tracing band for isolation, so that the temperature of a medium in the steel pipe is reduced to be transmitted to the surface of the electric tracing pipe. A heat preservation layer is arranged outside the electric tracing band, under the condition that the exposure temperature of the electric tracing band is met, the electric tracing band is used for maintaining the temperature of a medium in the steel pipe, and the working condition application of the ultrahigh exposure temperature and the low maintaining temperature is met.

Description

Technical Field

[0001] This utility model relates to the field of heat tracing pipes, specifically to an electric heat tracing pipe. Background Technology

[0002] Electric heat tracing pipes are products that convert electrical energy into heat energy to provide heat tracing and insulation for the medium inside the pipeline. They are widely used in scenarios such as freeze protection, maintaining process temperature, and preventing condensation of the medium, replacing traditional steam heat tracing and reducing maintenance costs. Currently, the highest exposure temperature of mainstream electric heat tracing tapes on the market is 260℃. When the initial temperature of the medium inside the steel pipe exceeds the exposure temperature of the electric heat tracing tape, it will be damaged and cannot be used in conditions with extremely high exposure temperatures and low maintenance temperatures. Utility Model Content

[0003] The purpose of this utility model is to provide an electric heat tracing pipe that solves the technical problem mentioned in the background art that existing electric heat tracing pipes cannot be used in working conditions with ultra-high exposure temperature and low maintenance temperature.

[0004] To achieve the above objectives, this utility model provides an electric heat tracing pipe, comprising a steel pipe and an electric heat tracing tape. The steel pipe is provided with a covering layer, the electric heat tracing tape is disposed outside the covering layer, an insulation layer is disposed outside the electric heat tracing tape and the covering layer, and a sheath layer is disposed outside the insulation layer.

[0005] Furthermore, the covering layer and the insulation layer are glass fiber layers.

[0006] Furthermore, the thickness of the coating layer is greater than the outer diameter of the steel pipe.

[0007] Furthermore, the steel pipe is a 316 stainless steel pipe.

[0008] Furthermore, the sheath layer is a PVC layer.

[0009] Compared with existing technologies, the beneficial effect of this utility model is that by setting a covering layer between the steel pipe and the electric heating tape for isolation, the temperature transfer of the medium inside the steel pipe to the surface of the electric heating tape is reduced. An insulation layer is set outside the electric heating tape, and while meeting the exposure temperature requirements of the electric heating tape, the medium inside the steel pipe is maintained by the electric heating tape, thus meeting the requirements of applications with ultra-high exposure temperatures and low maintenance temperatures. Attached Figure Description

[0010] Figure 1 This is a schematic cross-sectional view of the present invention.

[0011] In the diagram, 1 is the steel pipe; 2 is the cladding layer; 3 is the insulation layer; 4 is the electric heating tape; and 5 is the sheath layer. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0013] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0014] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0015] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings.

[0018] See appendix for details Figure 1As shown, the electric heat tracing pipe of this utility model includes a steel pipe 1 and an electric heat tracing cable 4, with a covering layer 2 wrapped around the steel pipe 1. The electric heat tracing cable 4 is disposed outside the covering layer 2, and an insulation layer 3 is disposed outside both the electric heat tracing cable 4 and the covering layer 2, wrapping the electric heat tracing cable 4 and the covering layer 2 together. A sheath layer 5 is disposed outside the insulation layer 3. The covering layer 2 isolates the steel pipe 1 and the electric heat tracing cable 4, preventing the electric heat tracing cable 4 from directly contacting the steel pipe 1 through which the high-temperature medium flows, thus preventing damage to the electric heat tracing cable 4. The insulation layer 3 serves to insulate the heat, allowing the heat generated by the electric heat tracing cable 4 to be transferred to the medium inside the steel pipe 1. The covering layer 2 and the insulation layer 3 are preferably made of glass fiber, which is both high-temperature resistant and has a low thermal conductivity.

[0019] This invention can be designed according to actual operating conditions. Given the temperature of the medium inside the steel pipe 1 and the exposure temperature of the electric heating cable 4, the thickness of the covering layer 2 required to reduce the temperature of the medium inside the steel pipe 1 below the exposure temperature of the electric heating cable 4 is calculated using the heat loss calculation formula. If the covering layer 2 is too thin, it will not provide adequate insulation; if it is too thick, it will affect the heat transfer effect. Preferably, the thickness H of the covering layer 2 is greater than the outer diameter D of the steel pipe. The covering layer 2 separates the steel pipe 1 from the electric heating cable 4, ensuring that the electric heating cable 4 can operate normally. The insulation layer 3 helps maintain the temperature of the medium inside the steel pipe 1 by the temperature generated by the electric heating cable 4. The optimal thickness of the insulation layer 3 can be calculated by monitoring the ambient temperature to ensure the overall temperature maintenance effect of the electric heating pipe.

[0020] In this utility model, the steel pipe 1 can be made of 316 stainless steel or copper, preferably 316 stainless steel, and the sheath layer 5 can be made of TPU or PVC, preferably PVC.

[0021] The basic principles and advantages of this utility model have been described above. For those skilled in the art, the above embodiments are merely illustrative of the technical solutions of this utility model and not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some or all of the technical features by reading this specification. Any obvious substitutions are within the protection scope of this utility model without departing from its concept.

Claims

1. An electric heat tracing pipe, characterized in that, It includes a steel pipe (1) and an electric heating tape (4). The steel pipe (1) is covered with a coating layer (2). The electric heating tape (4) is placed outside the coating layer (2). The electric heating tape (4) and the coating layer (2) are covered with an insulation layer (3). The insulation layer (3) is covered with a sheath layer (5).

2. The electric heat tracing pipe according to claim 1, characterized in that, The covering layer (2) and the insulation layer (3) are glass fiber layers.

3. An electric heat tracing pipe according to claim 2, characterized in that, The thickness of the coating layer (2) is greater than the outer diameter of the steel pipe (1).

4. An electric heat tracing pipe according to claim 3, characterized in that, The steel pipe (1) is a 316 stainless steel pipe.

5. An electric heat tracing pipe according to claim 4, characterized in that, The sheath layer (5) is a PVC layer.

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