Multi-core combined lightning protection cable

Abstract

The application discloses a multi-core combined lightning protection cable and relates to the technical field of power cables, which comprises a first framework, a plurality of fins are fixedly arranged on the inner side of the first framework, a second framework is arranged between the fins on the inner side of the first framework, the inner space of the first framework is divided into a first circulating cavity and a second circulating cavity through the second framework, the first circulating cavity and the second circulating cavity are filled with cooling liquid, a plurality of first electric cores are embeddedly arranged on the outer side of the first framework through twisting, a second electric core is arranged between adjacent first electric cores through twisting, an aluminum foil shielding layer is arranged on the outer side of the first electric core and the second electric core, a heat insulation layer is arranged on the outer side of the aluminum foil shielding layer, and a silk screen braiding layer is arranged on the outer side of the heat insulation layer. The first electric core and the second electric core are used for power conduction, the aluminum foil shielding layer plays a role in preliminary shielding, the aluminum foil shielding layer has a very good shielding effect on interference, and the heat generated by the first electric core and the second electric core is easily locked in the aluminum foil shielding layer.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, specifically a multi-core combined lightning protection cable. Background Technology

[0002] Lightning protection cables are special cables designed to withstand lightning strikes and the enormous currents and overvoltages generated by lightning induction. They are an indispensable component of lightning protection systems. Many products also integrate a metal armor layer, providing both mechanical protection and a current-carrying channel. These cables are widely used in fields with extremely high lightning protection requirements, such as communication base stations, wind power generation, railway signaling, building lightning protection down conductors and grounding systems, and petrochemical industries. They not only protect equipment from surge impacts but also prevent secondary disasters such as fires and explosions caused by lightning strikes, serving as a critical line of defense for the safety of important facilities and personnel.

[0003] The invention disclosed in authorization announcement number CN103794288B is a lightning-protected power cable. It uses three main conductors arranged in an equilateral triangle to make the internal structure of the cable stable. One of the main conductors has both power and signal transmission functions, and auxiliary conductors filled in the gaps are used to compensate for power transmission. In addition, aluminum wire is obliquely wrapped to prevent lightning strikes. The internal secondary conductors are independently shielded to prevent signal interference, thus achieving an efficient unity of structural strength, space utilization and multi-functional transmission.

[0004] The aforementioned device can achieve the purpose of lightning protection for cables. Under the current technology, multiple shielding methods are used for cable shielding protection, which inevitably leads to poor heat dissipation inside the cable. This may pose a safety hazard if the cable is operated for a long time. For example, the inherent characteristics of aluminum foil shielding result in poor heat dissipation. Therefore, a device that can effectively dissipate heat from the internal cable is needed. In addition, both ends of the lightning protection cable still need to be treated. For example, each shielding layer that needs to be grounded should be grounded. Therefore, an end grounding device is needed to cooperate with this, so that the cable can have good lightning protection and good heat dissipation, thereby improving the practical value of the lightning protection cable. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-core combined lightning protection cable to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A multi-core combined lightning protection cable includes a first frame, with several fins fixedly disposed on the inner side of the first frame. A second frame is installed between the fins on the inner side of the first frame, dividing the internal space of the first frame into a first circulation cavity and a second circulation cavity. The first and second circulation cavities are filled with coolant. Several first cells are wound and embedded on the outer side of the first frame, and second cells are wound and installed between adjacent first cells. An aluminum foil shielding layer is disposed on the outer side of the first and second cells. A heat insulation layer is disposed on the outer side of the aluminum foil shielding layer. A wire mesh braiding layer is disposed on the outer side of the heat insulation layer. Lubricating oil is applied to the wire mesh braiding layer. Several grounding units are disposed on the outer side of the wire mesh braiding layer. Graphite blocks are disposed between adjacent grounding units. An armor layer is disposed on the outer side of the grounding units and graphite blocks. An outer sheath is disposed on the outer side of the armor layer. A wire grounding device and a circulating cooling device are respectively disposed at both ends of the first frame.

[0008] As a further aspect of the present invention: the first battery cell includes an insulating layer and a metal core, and the second battery cell includes an insulating layer and a metal core.

[0009] As a further embodiment of the present invention: the grounding unit includes three grounding wires.

[0010] As a further embodiment of the present invention: the grounding device includes an inner sleeve layer, an aluminum foil shielding layer is connected to the inner sleeve layer by symmetrically arranged aluminum foil connecting blocks, a wire mesh braided layer is connected to the inner sleeve layer by symmetrically arranged wire mesh connecting blocks, the grounding wire and the armor layer are extended and installed on the inner sleeve layer, and two fixing rings are arranged opposite each other on the outer side of the inner sleeve layer, and the two fixing rings are locked by bolts and nuts, and a main grounding mechanism is provided on one of the fixing rings.

[0011] As a further embodiment of the present invention: the circulating cooling device includes a water pump and a horn frame. The water pump is provided with an inlet and outlet pipe on the left side of the horn frame, which cooperates with the first frame and the second frame. A radiator is provided on the right side of the water pump. The water pump and the radiator are fixedly connected by four connecting columns. The water pump and the radiator are connected by several second connecting pipes. The inlet and outlet pipes are connected to the radiator by several first connecting pipes.

[0012] As a further aspect of the present invention, a one-way valve is provided on the first connecting pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] Power is conducted through the first and second battery cells. The aluminum foil shielding layer provides initial shielding, offering excellent interference protection and enabling lighter and thinner cables. Furthermore, the aluminum foil conducts heat rapidly in the longitudinal direction (along its planar direction) and has high thermal resistance in the transverse direction (along its thickness direction), effectively trapping the heat generated by the first and second battery cells within the aluminum foil shielding layer. The first frame absorbs the heat from the first and second battery cells, while the fins increase the heat dissipation area inside the first frame, facilitating timely heat dissipation. The coolant in the second circulation chamber carries away heat from the first frame and fins, and also cools the coolant in the second circulation chamber, improving its heat dissipation efficiency and maintaining the balance between the first and second battery cells. The cable features high-efficiency power transmission, with an insulation layer separating heat between the inner and outer sides. There is no heat transfer between the first and second battery cores and the grounding wire, preventing damage to these cores during lightning strikes. The wire mesh braided layer provides secondary shielding, and the grease applied to it lubricates the layer, preventing breakage due to friction between the grounding wire and the braided layer (preventing shielding failure or reduced effectiveness). Graphite blocks connect the grounding wire to the armor layer, and the debris generated during graphite block wear further lubricates the braided layer, providing additional protection. During lightning strikes, the aluminum foil shielding layer and the wire mesh braided layer work together to reduce induced charges. The grounding wire and armor layer conduct the lightning strike into the ground, ensuring stable cable operation and enhancing its practicality.

[0015] The aluminum foil shielding layer and wire mesh braiding layer inside the cable are grounded by aluminum foil connecting blocks and wire mesh connecting blocks. The grounding wire and armor layer are connected to the inner sheath and fixing ring, so that the aluminum foil shielding layer, wire mesh braiding layer, grounding wire and armor layer can be grounded together. The total grounding mechanism is connected to the earth to achieve a good grounding effect and ensure the technical effect of cable lightning protection.

[0016] The water pump facilitates the circulation of coolant in the first and second circulation chambers, and the radiator dissipates heat from the coolant, thereby improving the power transmission efficiency of the cable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the planar structure of the present invention.

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the partial explosion structure of the present invention.

[0020] Figure 4 This is a three-dimensional structural diagram of the first skeleton in this invention.

[0021] Figure 5 This is a three-dimensional structural diagram of the circulating cooling device in this invention.

[0022] Figure 6 This is a partial three-dimensional structural diagram of the circulating cooling device in this invention.

[0023] Figure 7 This is a partial three-dimensional structural diagram of the voltage line grounding device in this invention.

[0024] Figure reference numerals: 1. First frame; 2. Second frame; 3. Fin; 4. First circulation chamber; 5. Second circulation chamber; 6. First battery cell; 7. Second battery cell; 8. Aluminum foil shielding layer; 9. Heat insulation layer; 10. Wire mesh braided layer; 11. Grounding wire; 12. Graphite block; 13. Armor layer; 14. Outer sheath; 15. Grounding device; 151. Inner sheath; 152. Fixing ring; 153. Bolt and nut; 154. Main grounding mechanism; 155. Aluminum foil connecting block; 156. Wire mesh connecting block; 16. Circulating cooling device; 161. Water pump; 162. Inlet and outlet pipes; 163. First connecting pipe; 164. One-way valve; 165. Radiator; 166. Second connecting pipe; 167. Connecting post; 168. Speaker frame. Detailed Implementation

[0025] The following embodiments will describe the present invention in detail with reference to the accompanying drawings. In the drawings or description, similar or identical parts are referred to by the same reference numerals, and in practical applications, the shape, thickness, or height of each component may be enlarged or reduced. The embodiments listed in this invention are merely illustrative and not intended to limit the scope of the invention. Any obvious modifications or changes made to this invention do not depart from the spirit and scope of the invention.

[0026] Example

[0027] Please see Figures 1-7In this embodiment of the invention, a multi-core combined lightning protection cable includes a first frame 1. A plurality of fins 3 are fixedly disposed on the inner side of the first frame 1. A second frame 2 is installed between the fins 3 on the inner side of the first frame 1, dividing the internal space of the first frame 1 into a first circulation chamber 4 and a second circulation chamber 5. The first circulation chamber 4 and the second circulation chamber 5 are filled with coolant. A plurality of first cells 6 are wound and embedded on the outer side of the first frame 1. A second cell 7 is wound and installed between adjacent first cells 6. The first cell 6 includes an insulation layer and a metal core, and the second cell 7 includes an insulation layer and a metal core. An aluminum foil shielding layer 8 is disposed on the outer side of the first cells 6 and the second cells 7. The cable has a heat insulation layer 9, and a wire mesh braided layer 10 is provided on the outside of the heat insulation layer 9. The wire mesh braided layer 10 is coated with lubricating oil. Several grounding units are provided on the outside of the wire mesh braided layer 10. Each grounding unit includes three grounding wires 11. A graphite block 12 is provided between adjacent grounding units. An armor layer 13 is provided on the outside of the grounding unit and the graphite block 12. An outer sheath 14 is provided on the outside of the armor layer 13. A wire grounding device 15 and a circulating cooling device 16 are respectively provided at both ends of the first frame 1. Power is conducted through the first battery cell 6 and the second battery cell 7. The aluminum foil shielding layer 8 plays a preliminary shielding role. The aluminum foil shielding has a very good shielding effect against interference, which can make the cable lighter and thinner. In addition, the aluminum foil is longitudinally (along the plane of the aluminum foil). The first battery cell 6 and the second battery cell 7 can conduct heat quickly in the direction of the aluminum foil. They have high thermal resistance in the transverse direction (along the thickness direction of the aluminum foil). The heat generated by the first battery cell 6 and the second battery cell 7 is easily trapped within the aluminum foil shielding layer 8. The first frame 1 absorbs the heat from the first battery cell 6 and the second battery cell 7. The fins 3 increase the heat dissipation area inside the first frame 1, facilitating timely heat dissipation. The coolant in the second circulation chamber 5 carries away the heat from the first frame 1 and the fins 3. The coolant in the first circulation chamber 4 cools the coolant in the second circulation chamber 5, improving the heat dissipation efficiency of the coolant in the second circulation chamber 5 and maintaining high-efficiency power transmission between the first battery cell 6 and the second battery cell 7. The heat insulation layer 9 separates the heat from the inside and outside. There is no heat between the first battery cell 6, the second battery cell 7 and the grounding wire 11. Heat transfer is achieved to prevent lightning strikes from affecting the first battery cell 6 and the second battery cell 7. The wire mesh braided layer 10 serves as a secondary shield, and the grease applied to it acts as a lubricant to prevent the wire mesh braided layer 10 from breaking due to friction between the grounding wire 11 and the wire mesh braided layer 10 (preventing the wire mesh braided layer 10 from failing to shield or reducing its effectiveness). The graphite block 12 connects the grounding wire 11 to the armor layer 13. In addition, the debris generated by the graphite block 12 during wear also acts as a lubricant, further protecting the wire mesh braided layer 10. During a lightning strike, the aluminum foil shielding layer 8 and the wire mesh braided layer 10 work together to shield and reduce induced charges. The grounding wire 11 and the armor layer 13 conduct the lightning strike into the ground, enabling the cable to operate stably and improving the cable's practicality.

[0028] The grounding device 15 includes an inner sleeve 151. Aluminum foil shielding layer 8 is connected to the inner sleeve 151 via symmetrically arranged aluminum foil connecting blocks 155. A wire mesh braided layer 10 is connected to the inner sleeve 151 via symmetrically arranged wire mesh connecting blocks 156. The grounding wire 11 and armor layer 13 extend and are mounted on the inner sleeve 151. Two fixing rings 152 are arranged opposite each other on the outer side of the inner sleeve 151. The two fixing rings 152 are locked together by bolts and nuts 153. One of the fixing rings 152... The cable is equipped with a main grounding mechanism 154. The aluminum foil shielding layer 8 and the wire mesh braided layer 10 inside the cable are grounded through the aluminum foil connecting block 155 and the wire mesh connecting block 156. The grounding wire 11 and the armor layer 13 are connected to the inner sleeve layer 151 and the fixing ring 152, so that the aluminum foil shielding layer 8, the wire mesh braided layer 10, the grounding wire 11 and the armor layer 13 can be grounded together. The main grounding mechanism 154 is connected to the earth to achieve a good grounding effect and ensure the technical effect of lightning protection for the cable.

[0029] The circulating cooling device 16 includes a water pump 161 and a horn frame 168. The water pump 161 has an inlet / outlet pipe 162 on its left side, inside the horn frame 168, which cooperates with the first frame 1 and the second frame 2. The water pump 161 has a radiator 165 on its right side. The water pump 161 and the radiator 165 are fixedly connected by four connecting columns 167. The water pump 161 and the radiator 165 are connected by several second connecting pipes 166. The inlet / outlet pipe 162 is connected to the radiator 165 by several first connecting pipes 163. A one-way valve 164 is provided on the first connecting pipe 163. The water pump 161 facilitates the circulation of coolant in the first circulation chamber 4 and the second circulation chamber 5. The radiator 165 dissipates heat from the coolant, which helps to improve the power transmission efficiency of the cable.

[0030] During operation, power is transmitted through the first battery cell 6 and the second battery cell 7. The first frame 1 supports and conducts heat for the first battery cell 6 and the second battery cell 7, while the second frame 2 supports and separates the first frame 1. The fins 3 increase the heat dissipation area inside the first frame 1, facilitating timely heat dissipation. The coolant in the second circulation chamber 5 carries away heat from the first frame 1 and the fins 3, while the coolant in the first circulation chamber 4 cools the coolant in the second circulation chamber 5, improving the heat dissipation efficiency of the coolant in the second circulation chamber 5 and maintaining high-efficiency power transmission between the first battery cell 6 and the second battery cell 7. The aluminum foil shielding layer 8 and the wire mesh braided layer 10 work together to shield and reduce induced charges. Finally, the cable is installed at both ends. The grounding device 15 and the circulating cooling device 16 have an inner sleeve 151 installed on the outer sheath 14. The aluminum foil shielding layer 8 is connected to the aluminum foil connecting block 155, and the wire mesh braiding layer 10 is connected to the wire mesh connecting block 156. Then, the aluminum foil connecting block 155 and the wire mesh connecting block 156 are installed on the inner sleeve 151. Then, the grounding wire 11 and the armor layer 13 are installed on the inner sleeve 151. The fixing ring 152 and the bolt and nut 153 are used to lock the connection. The main grounding mechanism 154 is connected to the earth. The water pump 161 is started and the water circulates in the first circulation chamber 4 and the second circulation chamber 5 through the radiator 165 and other connecting mechanisms, thereby dissipating heat from the first battery cell 6 and the second battery cell 7.

[0031] An insulating protective shell can be installed between the grounding device 15 and the circulating cooling device 16 to further optimize the lightning protection of the cable.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-core combined lightning-protected cable comprising a first carcass (1), characterized in that, The first skeleton (1) is fixedly provided with fins (3) on the inner side, the second skeleton (2) is mounted between the fins (3) on the inner side of the first skeleton (1), the internal space of the first skeleton (1) is divided into a first circulating cavity (4) and a second circulating cavity (5) by the second skeleton (2), the first circulating cavity (4) and the second circulating cavity (5) are filled with cooling liquid, a plurality of first electric cores (6) are embedded and mounted by winding on the outer side of the first skeleton (1), a second electric core (7) is mounted by winding between adjacent first electric cores (6), an aluminum foil shielding layer (8) is arranged on the outer side of the first electric core (6) and the second electric core (7), a heat insulation layer (9) is arranged on the outer side of the aluminum foil shielding layer (8), a silk screen woven layer (10) is arranged on the outer side of the heat insulation layer (9), the silk screen woven layer (10) is smeared with lubricating oil, a plurality of groups of grounding units are arranged on the outer side of the silk screen woven layer (10), a graphite block (12) is arranged between adjacent grounding units, an armored layer (13) is arranged on the outer side of the grounding unit and the graphite block (12), an outer skin (14) is arranged on the outer side of the armored layer (13), and a wire pressing grounding device (15) and a circulating cooling device (16) are arranged at both ends of the first skeleton (1) respectively.

2. The multi-core combined lightning-protected cable according to claim 1, characterized in that, The first electric core (6) comprises an insulating layer and a metal core, and the second electric core (7) comprises an insulating layer and a metal core.

3. The multi-core combined lightning-protected cable according to claim 2, characterized in that, The grounding unit comprises three grounding wires (11).

4. The multi-core combined lightning-protected cable according to claim 3, characterized in that, The wire pressing grounding device (15) comprises an inner sleeve layer (151), the aluminum foil shielding layer (8) is connected with the inner sleeve layer (151) through symmetrically arranged aluminum foil connecting blocks (155), the silk screen woven layer (10) is connected with the inner sleeve layer (151) through symmetrically arranged silk screen connecting blocks (156), the grounding wire (11) and the armored layer (13) are extended and mounted on the inner sleeve layer (151), the two fixed rings (152) are locked by bolts and nuts (153), and the total grounding mechanism (154) is arranged on one of the fixed rings (152).

5. Multi-core combined lightning-protected cable according to any of claims 1 to 4, characterized in that The circulating cooling device (16) comprises a water pump (161) and a horn holder (168), the water pump (161) is provided with an inlet and outlet liquid pipe (162) matched with the first skeleton (1) and the second skeleton (2) on the left side of the horn holder (168), the water pump (161) is provided with a radiator (165) on the right side, the water pump (161) and the radiator (165) are fixedly connected through four connecting columns (167), the water pump (161) and the radiator (165) are communicated through a plurality of second connecting pipes (166), and the inlet and outlet liquid pipe (162) and the radiator (165) are communicated through a plurality of first connecting pipes (163).

6. The multi-core combined lightning-protected cable according to claim 5, characterized in that, The first connecting pipe (163) is provided with a one-way valve (164).

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