High-temperature-resistant flame-retardant MPP electric power sheath tube structure

Abstract

The utility model discloses a high-temperature-resistant flame-retardant MPP electric power sheath tube structure, which comprises an inner tube and an outer tube, rock wool layers are arranged between the inner tube and the outer tube, the rock wool layers comprise a first rock wool layer, a second rock wool layer and a heat conductor, the first rock wool layer is attached to the inner wall of the outer tube, the second rock wool layer is attached to the outer wall of the inner tube, and the heat conductor is arranged between the inner tube and the outer tube. Through the mode that the heat conductor is clamped between the first rock wool layer and the second rock wool layer, when one side of the first rock wool layer is subjected to high temperature, heat is rapidly conducted and diffused from the heat conductor, the heat is locally dispersed to all areas of the protective sleeve pipe from the protective sleeve pipe, the heat in the local areas is reduced, then the dispersed heat is blocked by the second rock wool layer, and the heat dissipation efficiency of the protective sleeve pipe is improved. According to the cable sheath pipe, the inner pipe is locally subjected to lower temperature and is not easy to burn, the temperature of the cable at the position is protected, and through the design of inert gas in the cavity, the contact area between the outer wall and the inner wall of the inner pipe is reduced, the heat-conducting property of the inner pipe is reduced, and the high-temperature resistance and the flame-retardant property of the sheath pipe are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of MPP electric power sheath pipes, and in particular relates to a high-temperature resistant and flame-retardant MPP electric power sheath pipe structure. Background Art

[0002] In order to protect the cables and increase the high temperature resistance and flame retardant protection effect, the existing MPP power sheath pipe needs to be fireproofed and heat-insulated. For example, patent application number 202122469684.8 discloses a high-strength heat-resistant MPP power sheath pipe, including an inner tube, an outer tube and a rock wool layer, etc. The rock wool layer is used to achieve flame retardant and heat-insulating effects on the cables in the inner tube.

[0003] Although the thermal conductivity of the rock wool layer is poor, when one side of the sheath pipe is exposed to high temperature, such as exposure to the sun or close to a fire source, the rock wool layer on the side close to the high temperature will still gradually conduct the high temperature and diffuse it to the surroundings. Moreover, the inner pipe does not have a heat insulation effect, and its thermal conductivity is better than that of the rock wool layer. As a result, the heat from the rock wool layer on the high-temperature side diffuses less to other rock wool layer areas around it, and more heat will be conducted to the inner pipe, which not only damages the inner pipe here, but also the temperature of the cable here. Therefore, this high temperature resistant and flame retardant method still has defects in protection effect. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a high-temperature resistant and flame-retardant MPP electric power sheath pipe structure. By sandwiching a heat conductor between a first rock wool layer and a second rock wool layer, when one side of the first rock wool layer is subjected to high temperature, heat is quickly conducted and diffused from the heat conductor, so that the heat is locally dispersed from the sheath pipe to various areas of the sheath pipe, thereby reducing the heat in the local area. The second rock wool layer then blocks the dispersed heat, so that the temperature locally received by the inner pipe is lower, combustion is less likely to occur, and the temperature of the cable here is protected. In addition, by designing the inert gas in the cavity, the contact area between the outer wall and the inner wall of the inner pipe is reduced, the thermal conductivity of the inner pipe is reduced, and the high temperature resistance and flame retardancy of the sheath pipe are improved.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-temperature resistant and flame-retardant MPP electric sheath pipe structure comprises an inner pipe and an outer pipe, a rock wool layer is arranged between the inner pipe and the outer pipe, the rock wool layer comprises a first rock wool layer, a second rock wool layer and a heat conductor, the first rock wool layer is bonded to the inner wall of the outer pipe, the second rock wool layer is bonded to the outer wall of the inner pipe, the heat conductor is arranged between the first rock wool layer and the second rock wool layer, and a cavity is opened on the inner wall of the inner pipe, and the cavity is filled with an inert gas.

[0007] Furthermore, the heat conductor is a cylindrical copper sheet.

[0008] Furthermore, the inert gas in the cavity is argon.

[0009] Furthermore, the outer wall of the outer tube is coated with a reflective film.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. By sandwiching the heat conductor between the first rock wool layer and the second rock wool layer, when one side of the first rock wool layer is subjected to high temperature, the heat is quickly conducted and diffused from the heat conductor, so that the heat is locally dispersed from the sheath pipe to various areas of the sheath pipe, thereby reducing the heat in the local area, and then the second rock wool layer blocks the dispersed heat, so that the temperature of the local part of the inner pipe is lower, it is not easy to burn, and the temperature of the cable here is protected. In addition, through the design of inert gas in the cavity, the contact area between the outer wall and the inner wall of the inner pipe is reduced, the thermal conductivity of the inner pipe is reduced, and the high temperature resistance and flame retardancy of the sheath pipe are improved.

[0012] 2. The copper sheet is used as a heat conductor to facilitate rapid heat conduction. Argon is used as the filling gas to reduce the thermal conductivity of the gas. The reflective film reflects light to reduce the heat absorbed by the sheath tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the inner tube of the utility model.

[0015] In the figure: 1 inner tube, 2 outer tube, 3 first rock wool layer, 4 second rock wool layer, 5 heat conductor, 6 cavity. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention. Example

[0018] See attached Figure 1-2 As shown, a high-temperature resistant and flame-retardant MPP electric sheath pipe structure comprises an inner pipe 1 and an outer pipe 2, a rock wool layer is arranged between the inner pipe 1 and the outer pipe 2, the rock wool layer comprises a first rock wool layer 3, a second rock wool layer 4 and a heat conductor 5, the first rock wool layer 3 is bonded to the inner wall of the outer pipe 2, the second rock wool layer 4 is bonded to the outer wall of the inner pipe 1, the heat conductor 5 is arranged between the first rock wool layer 3 and the second rock wool layer 4, and a cavity 6 is opened on the inner wall of the inner pipe 1, and the cavity 6 is filled with an inert gas.

[0019] The heat conductor 5 is a cylindrical copper sheet.

[0020] The inert gas in the cavity 6 is argon.

[0021] The outer wall of the outer tube 2 is coated with a reflective film.

[0022] Working principle: In the utility model, when one part of the sheath pipe is exposed to the sun or close to a fire source, the reflective film first reflects the light to reduce the heat absorbed by the outer tube 2. The reflective film can be made of aluminum film or tin film, etc. When one side of the first rock wool layer 3 is subjected to the high temperature conducted by the outer tube 2, the heat is first blocked, and the reduced heat is quickly conducted and diffused from the heat conductor 5 made of copper sheet, so that the heat is dispersed from the local sheath pipe to various areas of the sheath pipe, thereby reducing the heat in the local area, and then the second rock wool layer 4 blocks the dispersed heat, and the heat conducted to the inner tube 1 is further reduced. In addition, when the temperature of the outer wall of the inner tube 1 is conducted to the inner wall, argon, as an inert gas with poor thermal conductivity, will further reduce the temperature conducted to the inner wall, and then the cable in the inner tube 1 is subjected to the temperature reduction and will not burn due to the high temperature.

[0023] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0024] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high temperature resistant flame retardant MPP power sheath pipe structure, comprising an inner pipe (1) and an outer pipe (2), wherein a rock wool layer is provided between the inner pipe (1) and the outer pipe (2), characterized in that: The rock wool layer comprises a first rock wool layer (3), a second rock wool layer (4) and a heat conductor (5); the first rock wool layer (3) is bonded to the inner wall of the outer tube (2); the second rock wool layer (4) is bonded to the outer wall of the inner tube (1); the heat conductor (5) is arranged between the first rock wool layer (3) and the second rock wool layer (4); the inner wall of the inner tube (1) is provided with a cavity (6); and the cavity (6) is filled with an inert gas.

2. According to claim 1, a high temperature resistant flame retardant MPP power sheath pipe structure is characterized by: The heat conductor (5) is a cylindrical copper sheet.

3. The high temperature resistant and flame retardant MPP power sheath pipe structure according to claim 1 is characterized in that: The inert gas in the cavity (6) is argon.

4. The high temperature resistant and flame retardant MPP power sheath pipe structure according to claim 1 is characterized in that: The outer wall of the outer tube (2) is coated with a reflective film.

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