CN211063807U

CN211063807U - Skin effect cable

Info

Publication number: CN211063807U
Application number: CN202020051481.XU
Authority: CN
Inventors: 贺卫东; 杨魏伟
Original assignee: Zhengzhou Special Cable Co ltd
Current assignee: Zhengzhou Special Cable Co ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-07-21
Anticipated expiration: 2030-01-10

Abstract

The utility model provides a skin effect cable, relates to the heating cable field, including the copper conductor, its characterized in that, the outer parcel of copper conductor is equipped with the shielding layer, and the shielding layer intussuseption is filled with the filling glue that blocks water, and the shielding layer parcel is equipped with fire-retardant sheath outward, and fire-retardant sheath external fixation cover is equipped with protecting sheathing, the last breach of seting up along the axial of protecting sheathing, the fixed hot melt bushing that is equipped with in the breach, the caulking groove corresponding with the breach is seted up to the interval equipartition on the protecting sheathing, the elasticity staple bolt of embedding in the caulking. Compared with the prior art, the hot-melt lining tile is utilized to connect the cable and the heated pipeline, the elastic hoop and the protective shell are arranged, so that the cable is conveniently separated from the pipeline, meanwhile, the elastic hoop also plays a role in secondary cable fixing, the cable is dismantled without any damage of a laying layer, the dismantling process is simplified, and the re-laying performance of the heated pipeline is improved.

Description

Skin effect cable

Technical Field

The utility model belongs to the technical field of the heating cable and specifically relates to a skin effect cable.

Background

When alternating current or alternating electromagnetic field exists in the conductor, the current distribution in the conductor is not uniform, the current is concentrated on the outer surface layer of the conductor, the current density is larger as the current density is closer to the surface of the conductor, the current density in the conductor is actually smaller, the resistance of the conductor is increased, the loss power of the conductor is also increased, namely the thermal power in the conductor is increased due to the resistance increase, and the phenomenon is called skin effect. In reality, heating conveyable media such as chocolate, wax, thick oil and the like are heated by utilizing the skin effect for heat tracing gathering and transportation, but at present, when a heat tracing cable is laid, a connecting mode of fixing a lead and a pipeline is adopted, a whole external wrapping layer needs to be damaged when the lead is subsequently replaced, then the lead is cut off by gas cutting, the cut lead is usually damaged, welding slag remains outside the pipeline, and a new lead is not convenient to weld again.

SUMMERY OF THE UTILITY MODEL

To the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a skin effect cable, which can replace and disassemble the wires without damaging the external protective layer.

Its solution is, a skin effect cable, including the copper conductor, its characterized in that, the outer parcel of copper conductor is equipped with the shielding layer, and the shielding layer intussuseption is filled with the filler that blocks water, and the shielding layer parcel is equipped with fire-retardant sheath outward, and fire-retardant sheath external fixation cover is equipped with protecting sheathing, the last breach of seting up along the axial of protecting sheathing, the fixed hot melt bushing that is equipped with in the breach, the caulking groove corresponding with the breach is seted up to the interval equipartition on the protecting sheathing, the elasticity staple bolt of embedding in the caulking groove.

Preferably, a pipeline is arranged outside the protective shell and is in contact with the hot-melt lining tiles, the pipeline and the protective shell are fixed together by the elastic hoops, a waterproof layer is wrapped outside the protective shell, heat-conducting cement gum is filled among the waterproof layer, the pipeline and the protective shell, and a heat-insulating layer is wrapped outside the waterproof layer.

Preferably, the elastic hoop is a rubber hoop.

Preferably, the end of the gap close to the copper wire is narrower than the end far away from the copper wire, and the shape of the hot-melting lining tile is consistent with the shape of the gap.

The utility model has the advantages that: compared with the prior art, the hot-melt lining tile is utilized to connect the cable and the heated pipeline, the elastic hoop and the protective shell are arranged, so that the cable is conveniently separated from the pipeline, meanwhile, the elastic hoop also plays a role in secondary cable fixing, the cable is dismantled without any damage of a laying layer, the dismantling process is simplified, and the re-laying performance of the heated pipeline is improved.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic view of the present invention;

fig. 3 is a schematic diagram of the assembled structure of the present invention.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1-3, a skin effect cable comprises a copper conductor 1, and is characterized in that a shielding layer 2 is wrapped outside the copper conductor 1, the shielding layer 2 is made of aluminum foil or wire mesh, which plays roles of static electricity prevention and electromagnetic shielding and prevents cable breakdown, a water-blocking filling adhesive is filled in the shielding layer 2, the water-blocking filling adhesive is made of water-resistant or expandable ointment to prevent external liquid or humid air from entering the cable, a flame-retardant sheath 3 is wrapped outside the shielding layer 2, the surface temperature of the copper conductor 1 is raised after skin effect is generated, the flame-retardant sheath 3 is used for preventing the cable from being ignited due to overhigh temperature in the using process and preventing the sheath from burning due to no high temperature, a protective shell 4 is fixedly sleeved outside the flame-retardant sheath 3, the protective shell is a key for transferring heat and is made of a heat conduction material, a notch 5 is axially arranged on the protective shell 4, the hot-melt lining tiles 7 are fixedly arranged in the gaps 5, the hot-melt lining tiles 7 are made of thermoplastic resin, the protection shell 4 is evenly provided with caulking grooves 6 corresponding to the gaps 5 at intervals, and elastic anchor ears 9 are embedded in the caulking grooves 6. Alternating current is introduced into the copper wire 1, the current flows through the copper wire 1 and forms an alternating magnetic field, the alternating magnetic field generates induced electromotive force in the conductor, the induced electromotive force forms eddy current in the conductor, the direction of the eddy current on the outer surface of the cable is always the same as the variation trend of the introduced current, the variation of the introduced current is enhanced, the equivalent resistance is reduced, the variation trend of the eddy current in the cable is opposite to the variation trend of the introduced current, the variation of the introduced current is blocked, the internal equivalent resistance is increased, and the thermal power is increased; the hot-melt lining tile 7 is solid at normal temperature, the hot-melt lining tile 7 is heated to be gradually melted, the cable and the heated pipeline 8 are fixedly bonded together, a heat function is generated in the working process of the cable, the melting temperature of the hot-melt lining tile 7 is 70-288 ℃, the heat tracing temperature effectively maintained is 0-230 ℃, namely the hot-melt lining tile 7 with the melting point higher than the heat tracing temperature is selected to be not melted in normal use, the elastic hoop 9 plays a role in fixing the cable and the heated conduit at the same time, the elastic hoop 9 is embedded in the protective shell 4, the outer surface of the elastic hoop cannot protrude out of the protective shell, and laying of external solid parts is not influenced.

The pipeline 8 is arranged outside the protective shell 4, the pipeline 8 is in contact with the hot-melt lining tiles 7, the pipeline 8 and the protective shell 4 are fixed together through the elastic hoops 9, the waterproof layer 10 is wrapped outside the protective shell 4, heat-conducting cement mortar 12 is filled among the waterproof layer 10, the pipeline 8 and the protective shell 4, and the heat-insulating layer 11 is wrapped outside the waterproof layer 10. The copper wires 1 can be arranged in a plurality and uniformly distributed around the guide pipe, so that the heating efficiency is increased; the heat-conducting daub 12 increases the heat conduction area and establishes a high-efficiency low-heat-resistance heat transfer channel so as to improve the heat transfer efficiency, reduce the energy consumption and prevent the materials from being solidified and crystallized due to insufficient heat tracing temperature to block the pipeline 8; in order to prevent the hot-melt lining tiles 7 from displacing after being accidentally melted, the elastic hoops 9 are additionally arranged to tightly press the cables towards the pipeline 8, and the caulking grooves 6 are arranged at intervals, namely the elastic hoops 9 are also arranged at intervals, so that even if the cables move towards the pipeline 8, the adjacent heat-conducting daub 12 can ensure that external liquid or water vapor cannot enter the protective shell 4; the heat preservation 11 parcel is at overall structure's outmost, prevents that the heat tracing temperature from running off, stabilizes the internal heating condition.

The elastic hoop 9 is a rubber hoop. The hot melt lining tile 7 can melt after the skin effect cable begins to work, the rubber staple bolt can in time tighten up the clearance between cable and the pipeline 8, and rubber adopts high temperature resistant rubber, and the joint portion at staple bolt both ends is inside towards pipeline 8, and the setting can not influence laying of waterproof layer 10 and heat preservation 11 like this.

The end of the gap 5 close to the copper conductor 1 is narrower than the end far away from the copper conductor 1, and the shape of the hot-melt lining tile 7 is consistent with that of the gap 5. Because the special structure that the breach 5 is big outside and small inside, be not limited to when hot melt bushing 7 is connected with protective housing 4 through the mode of local point heating fix on protective housing 4, then be connected protective housing and pipeline 8, even if hot melt bushing 7 has melted, the cable also can move towards 8 directions of pipeline under the tightening up effect of elasticity staple bolt 9, supports 8 outer walls of pipeline with breach 5 to guarantee that the cable does not deviate from pipeline 8.

When the utility model is used, one end of the cable is connected with the head end junction box, the other end is connected with the tail end junction box, alternating current is conducted in the copper conductor 1, skin effect begins to occur, and heat is transferred to the substance in the conduit through heat conduction; when needing to be changed the cable because of maintenance or trouble, only need expose an elasticity staple bolt 9, hold elasticity staple bolt 9 and outwards pull, the side of contacting with elasticity staple bolt 9 on the caulking groove 6 is as the stress point, hot melt bushing 7 breaks away from pipeline 8 surface under the exogenic action simultaneously, thereby pull out the cable easily, withdraw from waterproof layer 10 and the heat preservation 11 of outside again after the cable is pulled out, reach the effect of not destroying waterproof layer 10 or heat preservation 11, the hot melt adhesive that remains on pipeline 8 also can strike off easily and do not influence laying new cable once more.

The above-mentioned embodiments are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design concept of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides a skin effect cable, includes copper conductor (1), its characterized in that, the outer parcel of copper conductor (1) is equipped with shielding layer (2), and shielding layer (2) intussuseption is filled with the filling glue that blocks water, and shielding layer (2) outer parcel is equipped with fire-retardant sheath (3), and fire-retardant sheath (3) external fixation cover is equipped with protecting sheathing (4), set up breach (5) along the axial on protecting sheathing (4), fixed hot melt bushing tile (7) that are equipped with in breach (5), caulking groove (6) corresponding with breach (5) are seted up to interval equipartition on protecting sheathing (4), embedding elasticity staple bolt (9) in caulking groove (6).

2. The skin effect cable according to claim 1, wherein a pipeline (8) is arranged outside the protective shell (4), the pipeline (8) is in contact with the hot-melt lining tile (7), the elastic hoop (9) fixes the pipeline (8) and the protective shell (4) together, a waterproof layer (10) is wrapped outside the protective shell (4), heat-conducting cement (12) is filled among the waterproof layer (10), the pipeline (8) and the protective shell (4), and an insulating layer (11) is wrapped outside the waterproof layer (10).

3. A skin effect cable according to claim 2, wherein the elastic anchor ear (9) is a rubber anchor ear.

4. A skin effect cable according to claim 2, wherein the end of the gap (5) near the copper conductor (1) is narrower than the end far from the copper conductor (1), and the shape of the thermofusible bush (7) corresponds to the shape of the gap (5).