A single core cable

Abstract

The present invention relates to the field of cables, and its purpose is to solve the problem of single-core cable passing through a pipe. A single-core cable is disclosed, including a cable body, wherein the cable body includes a conductor arranged inside, a shielding layer is sheathed outside the conductor, a corrugated aluminum sheath is sheathed outside the shielding layer, an outer sheath is arranged outside the corrugated aluminum sheath, and an electromagnetic block and a heat dissipation layer are alternately arranged between the outer sheath and the corrugated aluminum sheath, a card slot is arranged inside the electromagnetic block, an insert block is arranged inside the card slot, and a protective sheet is symmetrically arranged on the surface of the insert block, and the protective sheet can be controlled to open and close to protect the cable. The present invention increases the heat dissipation of the cable by adding an electromagnetic block and a protective sheet to the cable body, and controls the protective sheet by magnetic force, thereby strengthening the protection of the cable during the process of passing the cable through the pipe, and making it safer.

Description

Technical Field

[0001] The invention relates to the field of cables, in particular to a single-core cable. Background Art

[0002] Single-core means there is only one conductor in one insulation layer. When the voltage exceeds 35kV, most single-core cables are used. The relationship between its core and metal shielding layer can be regarded as the relationship between the coil and the iron core in the primary winding of a transformer. When current passes through the core of a single-core cable, magnetic lines of force will intersect the aluminum sheath or metal shielding layer, causing induced voltage at both ends.

[0003] A single-core cable for new energy vehicles with a publication number of CN115410766A is resistant to bending and tearing. By setting a rubber layer with good elasticity, an outer sheath layer resistant to high and low temperatures, and an elastic bending cover with good bending properties on the cable, the bending and tearing resistance of the cable in high and low temperature environments is enhanced, and the service life of the cable is extended. By setting the cable into components, after the single-core charging cable for new energy vehicles is used, the cable is rolled up at the same time, so that the cable will not be excessively bent and placed casually, which is not only convenient for cable storage, but also prevents the cable from being excessively bent. The above-mentioned cable mainly solves the problem of bending resistance, but it is not suitable for use in the process of pipe threading. How to enable the single-core cable to be threaded is the key to solving the technical problem.

[0004] Single-core cables are not easily oxidized due to their small cross-sectional area ratio, are resistant to short-circuit current shocks, and have a relatively long service life. However, single-core cables are relatively hard, making it inconvenient to pull the wires in some places, and are not easy to straighten after bending. Multiple bending can easily damage the wires. When installing through pipes, single-core wires appear hard. The reason why single-core cables cannot be passed through steel pipes alone is that when the current in the single-core cable passes through, an alternating magnetic field will be generated around the cable. If a single conductor passes through a steel pipe, the magnetic field will produce electromagnetic induction with the steel pipe, causing the steel pipe to heat up. In this case, the steel pipe becomes an iron core, which will consume the cable's electrical energy and increase the cable's inductive reactance, and may even cause a fire. Not only will there be danger when passing through steel pipes, but it is also not easy to pass through ordinary plastic pipes because single-core cables are not easy to bend or pass through pipes. Therefore, how to ensure the heat dissipation of the cable when passing through pipes is also relatively important. Therefore, the inventor invented a single-core cable to solve the problem of passing single-core cables through pipes. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies of the prior art and provide a single-core cable.

[0006] The present invention is achieved through the following technical solutions:

[0007] A single-core cable comprises a cable body. The cable body comprises an internally arranged conductor. A shielding layer is sheathed outside the conductor. A corrugated aluminum sheath is sheathed outside the shielding layer. An outer sheath is arranged outside the corrugated aluminum sheath. Electromagnetic blocks and heat dissipation layers are alternately arranged between the outer sheath and the corrugated aluminum sheath. A card slot is arranged inside the electromagnetic block. An insert block is installed in the card slot. Protective sheets are symmetrically installed on the surface of the insert block. The protective sheets can be controlled to open and close to protect the cable.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] The present invention protects the cable through a protective sleeve composed of a protective sheet, an electromagnetic block and a heat dissipation layer, and accelerates the heat dissipation by using the heat dissipation layer. The electromagnetic block can be set to energize the electromagnetic block when the cable is energized, and the opening and closing of the protective sheet can be controlled by magnetic force. When energized, the metal tube of the outer sleeve generates a magnetic field to open the protective sheet, accelerate the heat dissipation of the cable, and meet the heat dissipation requirements. When the power is not on, the protective sheet is closed to protect the cable. The setting of the protective sheet facilitates the guidance when the cable is passed through the pipe, and provides assistance for the pipe passing. By evenly setting the protective sleeve on the cable body, multi-region protection can be formed for the cable, and the cable can be better protected when the cable is used and passed through the pipe. The present invention adds an electromagnetic block and a protective sheet to the cable body, uses magnetic force to control the protective sheet, strengthens the heat dissipation of the cable, and strengthens the protection of the cable during the process of the cable passing through the pipe, which is safer.

[0010] Preferably, the protective cover composed of the protective sheet, the electromagnetic block and the heat dissipation layer is evenly distributed on the cable body, and the interval between each section is 15-20 cm.

[0011] Preferably, the protective sheet is made of a metal sheet spring, the area of ​​the protective sheet is equal to the heat dissipation layer, the heat dissipation layer is an independent small block, and the heat dissipation layer is a mesh structure.

[0012] Preferably, the electromagnetic block is an electromagnet, the electromagnetic block is in close contact with the corrugated aluminum sleeve, and the plug block is assembled with the electromagnetic block.

[0013] Preferably, the protective sheet is an arc-shaped structure.

[0014] Preferably, the outer surface of the outer sheath is coated with a semi-conductive coating.

[0015] The specific assembly method of a single-core cable of the present invention is as follows: first, the electromagnetic block and the heat dissipation layer are partially filled on the cable, which is mainly to improve the outer skin of the cable, and then the plug block is inserted into the electromagnetic block, and the protective sheet is positioned. The preparation work is completed. Normally, the protective sheet covers the position of the heat dissipation layer. Once the cable is energized and the cable is passed through the pipe, the sleeve outside the cable will generate magnetic force through electromagnetic induction. The generated magnetic force is greater than the magnetic force of the electromagnetic block, so that the protective sheet is in an open state. At this time, the heat dissipation effect of the cable is better, and the heat dissipation can be accelerated through the heat dissipation layer. The support of the protective sheet plays an auxiliary guiding role when passing through the pipe, and the pipe is more flexible. The cable of the present invention facilitates the threading of the cable in the wire tube by controlling the protective sheet on the one hand, and facilitates heat dissipation on the other hand, and protects the single-core cable when passing through the metal pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a side view of the protective sheet and the insert block of the present invention.

[0018] Figure 3 It is a schematic diagram of the cooperation between the protective sheet and the cable of the present invention.

[0019] Explanation of the numbers: 1. Heat dissipation layer, 2. Electromagnetic block, 3. Protective sheet, 4. Outer sheath, 5. Corrugated aluminum sheath, 6. Shielding layer, 7. Conductor, 8. Plug-in block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-3 , the present invention provides a technical solution:

[0022] A single-core cable comprises a cable body, wherein the cable body comprises a conductor 7 arranged inside, the conductor 7 is the inner core of the cable, a shielding layer 6 is sheathed outside the conductor 7, a corrugated aluminum sheath 5 is sheathed outside the shielding layer 6, an outer sheath 4 is arranged outside the corrugated aluminum sheath 5, and an electromagnetic block 2 and a heat dissipation layer 1 are alternately arranged between the outer sheath 4 and the corrugated aluminum sheath 5. The arrangement of the electromagnetic block 2 and the heat dissipation layer 1 forms a new cable, the heat dissipation layer 1 is mainly used to enhance the heat dissipation of the cable, and the electromagnetic block 2 belongs to the control part. When the cable is energized, the magnetic force is used to make the casing also generate magnetic force, and the opening of the protective sheet 3 is controlled, and the protective sheet 3 will support The inner wall of the sleeve supports the cable and opens the heat dissipation layer 1 to accelerate the heat dissipation of the cable. Experiments have shown that through the improvement of the cable, the temperature will be reduced by at least 15-20 degrees to protect the cable. A card slot is provided in the electromagnetic block 2, and a plug-in block 8 is installed in the card slot. The card slot is provided for assembling the plug-in block 8. The plug-in block 8 is inserted in the card slot for easy installation. A protective sheet 3 is symmetrically provided on the surface of the plug-in block 8. The protective sheet 3 can be controlled to open and close to protect the cable. When the cable is energized, the protective sheet 3 is opened, and when the cable is not energized, the protective sheet 3 is closed. The protective sheet 3 is opened to support and accelerate heat dissipation.

[0023] The protective cover composed of the protective sheet 3, the electromagnetic block 2 and the heat dissipation layer 1 is evenly distributed on the cable body, and the interval between each section is 15-20cm. By setting it every other section, the protection of the cable can be strengthened, whether it is pipe threading or heat dissipation, it can be effectively strengthened.

[0024] The protective sheet 3 is made of a metal sheet spring, the area of ​​the protective sheet 3 is equal to the heat dissipation layer 1, the heat dissipation layer 1 is an independent small block, the heat dissipation layer 1 is a mesh structure, the heat dissipation layer 1 is used to enhance the heat dissipation of the cable, and the support of the protective sheet 3 can guide the cable during the pipe threading process.

[0025] The electromagnetic block 2 is an electromagnet, which is in close contact with the corrugated aluminum sleeve 5. The insert block 8 is assembled with the electromagnetic block 2. The existence of the electromagnet can control the opening and closing of the protective sheet 3.

[0026] The protective sheet 3 is an arc-shaped structure, which is smoother and more convenient for pipe insertion.

[0027] The outer surface of the outer sheath 4 is coated with a semi-conductive coating.

[0028] It should be noted that the improved single-core cable is mainly used in pipe-threading scenarios, which solves the problem that single-core cables cannot pass through metal pipes. By adding a protective sleeve part, it is set every 15-20 cm, and the heat dissipation layer 1 is used to accelerate the heat dissipation of the cable, fundamentally realizing the cooling protection of the cable. When the cable passes through the metal pipe, the conductor in the cable is charged and will be transmitted to the electromagnetic block. At the same time, the current generates an alternating magnetic field, and the metal pipe will have magnetic force, which will adsorb the protective sheet 3 and open the protective sheet 3. At this time, the protective sheet 3 does not block the heat dissipation layer 1, and the heat dissipation of the cable is enhanced. The opening of the protective sheet 3 also facilitates the support of the cable. In this way, when the cable is passed through the pipe, due to the guidance of the protective sheet 3, the pipe penetration will be smoother, solving the problem that the single-core cable is not easy to pass through the pipe. By enhancing heat dissipation, the single-core cable can be used when it is necessary to pass through the metal pipe.

[0029] The following is the monitoring of the heating temperature of the cable after it passes through the pipe.

[0030] Experimental data:

[0031]

[0032] Experiments have shown that improving the cable can greatly speed up the heat dissipation of the cable, which can effectively protect the cable and increase the service life of the cable.

[0033] The specific data measurement steps are as follows:

[0034] First, use an ordinary cable to pass through the metal tube, and use a thermometer to measure the temperature generated by the cable every ten minutes. The thermometer probe is in contact with the cable, the value on the thermometer is read, and the measured temperature is recorded in a table; then, insert the improved cable into the metal tube, and measure the temperature generated by the cable every ten minutes. The thermometer probe is in contact with the improved cable, the value on the thermometer is read, and the value is recorded, and you will get the above temperature statistics table.

[0035] Operation steps: Specifically, first fill the electromagnetic block 2 and the heat dissipation layer 1 locally on the cable, which is mainly to improve the cable sheath, and then insert the plug block 8 into the electromagnetic block 2, position the protective sheet 3, and the preparation work is completed. Normally, the protective sheet 3 covers the position of the heat dissipation layer 1. Once the cable is energized and the cable is passed through a pipe, the electromagnetic induction will cause the outer sleeve of the cable to generate magnetic force. The generated magnetic force is greater than the magnetic force of the electromagnetic block 2, so that the protective sheet 3 is in an open state. At this time, the heat dissipation effect of the cable is better, and the heat dissipation can be accelerated through the heat dissipation layer 1. The support of the protective sheet 3 plays an auxiliary guiding role when passing through the pipe, and the pipe is more flexible.

[0036] At present, passing a single-core cable through a metal tube is still a major problem that needs to be solved. When the current flows in the single-core cable, the cable itself will generate an electric field, and will treat the steel tube as an iron core, consuming the electrical energy of the cable. In addition, there is an alternating magnetic field around the single conductor, and the magnetic field and the steel tube will produce electromagnetic induction, causing the steel tube to heat up and increase the inductive reactance of the current. In order to allow the single-core cable to pass through the metal tube, the single-core cable designed in the present invention has the function of passing through the metal tube. The protective sheet 3 can be used to guide the cable during the passing through the tube, which is convenient for bending the cable, and the open protective sheet can be used to enhance heat dissipation to prevent the high temperature from affecting the cable when the cable passes through the tube.

[0037] This specific embodiment is only an explanation of the present invention, not a limitation of the present invention. After reading this specification, those skilled in the art can make non-creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A single-core cable, comprising a cable body, characterized in that: The cable body comprises a conductor (7) arranged inside, a shielding layer (6) is sheathed outside the conductor (7), a corrugated aluminum sheath (5) is sheathed outside the shielding layer (6), an outer sheath (4) is arranged outside the corrugated aluminum sheath (5), and electromagnetic blocks (2) and heat dissipation layers (1) are alternately arranged between the outer sheath (4) and the corrugated aluminum sheath (5), a card slot is arranged inside the electromagnetic block (2), an insert block (8) is installed in the card slot, and a protective sheet (3) is symmetrically installed on the surface of the insert block (8), and the protective sheet (3) can be controlled to be opened and closed to protect the cable.

2. A single-core cable according to claim 1, characterized in that: The protective cover composed of the protective sheet (3), the electromagnetic block (2) and the heat dissipation layer (1) is evenly distributed on the cable body, and the interval between each section is 15-20 cm.

3. A single-core cable according to claim 1, characterized in that: The protective sheet (3) is made of a metal sheet spring, the area of ​​the protective sheet (3) is equal to the area of ​​the heat dissipation layer (1), the heat dissipation layer (1) is an independent small block, and the heat dissipation layer (1) is a mesh structure.

4. A single-core cable according to claim 1, characterized in that: The electromagnetic block (2) is an electromagnet, the electromagnetic block (2) is in close contact with the corrugated aluminum sleeve (5), and the insert block (8) is assembled with the electromagnetic block (2).

5. A single-core cable according to claim 1, characterized in that: The protective sheet (3) is an arc-shaped structure.

6. A single-core cable according to claim 1, characterized in that: The outer surface of the outer sheath (4) is coated with a semi-conductive coating.

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