Diameter expanding and cooling method for flat aluminum sleeve cable

Abstract

The invention discloses a method for expanding and cooling a flat aluminum sleeve cable, and relates to the technical field of cables. A flat aluminum sleeve cable diameter expanding and cooling method comprises the following steps that a flat aluminum sleeve cable to be installed is taken, and the installation side position section of the flat aluminum sleeve cable is straightened and straightened; removing an outer sheath and a flat aluminum sleeve on the installation side position section of the flat aluminum sleeve cable, wherein the removal length of the outer sheath is greater than the removal length of the flat aluminum sleeve; wrapping a layer of PVC (Polyvinyl Chloride) tape on the exposed buffer layer position section of the flat aluminum sheath cable after the flat aluminum sheath is removed; expanding a pipe orifice of the flat aluminum sleeve to form a trumpet-shaped structure; and the trumpet-shaped structure position of the flat aluminum sleeve is polished to remove sharp corner burrs. According to the invention, a novel diameter-expanding cooling method for the flat aluminum sleeve cable is developed, the diameter-expanding method for the flat aluminum sleeve cable is optimized, the internal structure of the cable can be prevented from being damaged by welding high-temperature heat during cable welding operation, the cable is protected, and the applicability is good.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to a method for expanding and cooling a flat aluminum sheathed cable. Background Art

[0002] Flat aluminum sheathed cable is a cable with a flat aluminum sheath wrapped on the outside of the cable product; by using a flat aluminum sheath, the flat aluminum sheathed cable can reduce the weight of the cable product, improve the corrosion resistance of the cable product, and improve the waterproof performance and processing performance of the cable product.

[0003] At present, when installing cable accessories, high-temperature lead sealing is required at the sealing point between the cable accessories and the cable body. Due to the special structure of the flat aluminum sheath, there is no gap between the buffer layer that is in direct contact with the flat aluminum sheath and its inner layer. If the lead sealing operation is performed directly on the flat aluminum sheath, the temperature during the lead sealing is enough to destroy the buffer layer structure inside the cable, causing irreversible damage to the performance of the cable.

[0004] The patent application number is CN202110692066.1, and the patent name is a patent for a method for installing high-voltage flat aluminum sheathed cable accessories. In order to solve the problem of high-temperature heat generated during the lead sealing operation, this patent performs a diameter expansion operation on one side of the flat aluminum sheath, and welds a section of a larger diameter expanded aluminum tube on the expanded trumpet-shaped tube mouth structure. During the lead sealing operation, the setting of the expanded aluminum tube changes the heat transfer medium and increases the heat transfer distance, thereby avoiding burns to the buffer layer structure inside the cable during the lead sealing operation.

[0005] In this regard, the inventor believes that although the setting of the amplified aluminum tube solves the problem of high-temperature lead sealing operation damaging the cable, the amplified aluminum tube and the flat aluminum sleeve will also generate heat of 500°C or above during the welding operation. The heat generated by the welding will still damage the buffer layer structure that is in direct contact with the inner layer of the flat aluminum sleeve. These losses will have an irreversible impact on the performance of the cable. Therefore, how to solve the above technical problems is a technical problem that technicians in this field urgently need to solve.

[0006] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0007] In view of the above technical problems, an embodiment of the present invention provides a method for expanding the diameter and reducing the temperature of a flat aluminum sheathed cable to solve the problems raised in the above background technology.

[0008] The present invention provides the following technical solutions:

[0009] A method for expanding and cooling a flat aluminum sheathed cable comprises the following steps:

[0010] Take the flat aluminum sheath cable to be installed, and align and straighten the installation side section of the flat aluminum sheath cable;

[0011] Remove the outer sheath and flat aluminum sheath on the installation side of the flat aluminum sheath cable, and the removal length of the outer sheath is greater than the removal length of the flat aluminum sheath;

[0012] Wrap a layer of PVC tape around the exposed buffer layer section after removing the flat aluminum sheath from the flat aluminum sheath cable;

[0013] The diameter of the pipe mouth of the flat aluminum sleeve is expanded and the pipe mouth is expanded into a trumpet-shaped structure;

[0014] Grind the trumpet-shaped structure of the flat aluminum sleeve to remove sharp corners and burrs, and clean the impurities and dust on the trumpet-shaped structure of the flat aluminum sleeve and the surface of the PVC belt;

[0015] Remove the PVC tape wrapped around the surface of the buffer layer, and then wrap a layer of semi-conductive tape tightly around the surface of the buffer layer;

[0016] A thermocouple is arranged inside the trumpet-shaped tube mouth of the flat aluminum sleeve, and then an amplified aluminum tube is sleeved on the installation side of the flat aluminum sleeve cable and pushed onto the trumpet-shaped tube mouth of the flat aluminum sleeve;

[0017] Wrap a waterproof tape layer around the outer sheath break position and the installation side port position of the flat aluminum sheath cable, and seal the wrapped waterproof tape layer with plastic wrap;

[0018] A cooling mold is installed on the flat aluminum sleeve near the trumpet-shaped nozzle of the flat aluminum sleeve;

[0019] The cooling mold works, and then the welding operation is performed at the butt joint of the trumpet-shaped pipe mouth of the amplified aluminum tube and the flat aluminum sleeve.

[0020] Preferably, in the step of aligning and straightening the installation side position section of the flat aluminum sheathed cable, straightening is required with the aid of a straightening tool, and during the straightening process, insulation heating at 85-90°C is required for 8 hours, and natural cooling operation for not less than 12 hours is required after insulation heating.

[0021] Preferably, in the step of aligning and straightening the installation side position section of the flat aluminum sheathed cable, the curvature of the cable after straightening is ensured to be no more than 3 mm per 600 mm.

[0022] Preferably, the diameter of the enlarged aluminum tube is greater than the diameter of the flat aluminum sleeve; the maximum diameter of the trumpet-shaped tube opening of the flat aluminum sleeve is 5 mm smaller than the diameter of the enlarged aluminum tube.

[0023] Preferably, after welding the amplified aluminum tube and the flat aluminum sheath, the waterproof tape layer and plastic wrap at the fracture position of the outer sheath and the installation side port position of the flat aluminum sheath cable need to be removed, and then the cable accessories are installed at the end of the amplified aluminum tube.

[0024] Preferably, the cooling mold includes an upper clamp, a lower clamp, bolts, and a circulation pipe;

[0025] The upper clamp comprises an upper arc-shaped clamping plate and upper connecting plates fixed on both sides of the upper arc-shaped clamping plate;

[0026] An upper arc-shaped cavity is arranged inside the upper arc-shaped clamping plate, and an upper liquid inlet and an upper liquid outlet communicating with the upper arc-shaped cavity are arranged on both sides of the plate wall of the upper arc-shaped clamping plate;

[0027] The lower clamp comprises a lower arc-shaped clamping plate and lower connecting plates fixed on both sides of the lower arc-shaped clamping plate;

[0028] A lower arc-shaped cavity is arranged inside the lower arc-shaped clamping plate, and a lower liquid inlet and a lower liquid outlet communicating with the lower arc-shaped cavity are arranged on both sides of the plate wall of the lower arc-shaped clamping plate;

[0029] The upper liquid outlet and the lower liquid inlet are connected through a circulation pipe;

[0030] The upper connecting plates and the lower connecting plates on both sides of the upper clamp and the lower clamp are butted against each other and locked by bolts.

[0031] Preferably, an upper through hole is provided on the upper connecting plate, and a lower through hole coaxial with the upper through hole is provided on the lower connecting plate; a bolt is passed through the upper through hole and the lower through hole, and a nut is connected to the tail of the bolt for locking.

[0032] Preferably, the upper liquid outlet of the upper fixture and the lower liquid inlet of the lower fixture are located on the same side of the cooling mold.

[0033] Preferably, the upper liquid inlet of the upper fixture and the lower liquid outlet of the lower fixture are connected to an external coolant circulation machine through pipelines, respectively.

[0034] Preferably, the upper clamp and the lower clamp are made of copper; the upper arc-shaped clamp of the upper clamp and the lower arc-shaped clamp of the lower clamp are clamped on the flat aluminum sleeve; copper strips are attached between the upper arc-shaped clamp, the lower arc-shaped clamp and the flat aluminum sleeve; and thermal conductive silicone grease is applied to the upper and lower surfaces of the copper strips.

[0035] A method for expanding and cooling a flat aluminum sheathed cable provided by an embodiment of the present invention has the following beneficial effects:

[0036] 1. The present invention re-optimizes the diameter expansion method of the flat aluminum sheathed cable, and performs the diameter expansion operation of the flat aluminum sheathed cable while ensuring the normal performance of the cable;

[0037] 2. The present invention directly cools the cable by assembling a cooling mold on the cable, which can prevent the high temperature heat of welding from damaging the internal structure of the cable during the cable welding operation, thereby protecting the cable;

[0038] 3. The present invention directly assembles a cooling mold on the cable for cooling treatment, so there is no need to perform other additional modifications on the cable structure, optimizes the cooling operation method, and simplifies the process flow;

[0039] 4. The present invention designs a cooling mold structure, which has a simple structure. During the cooling operation, the coolant in the cooling mold circulates under sealed conditions from beginning to end and will not overflow outside the cable, thus avoiding potential dangers. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of removing the outer sheath and the flat aluminum sheath on the installation side section of the flat aluminum sheath cable in the present invention;

[0041] Figure 2 It is a schematic diagram of the structure of assembling the cooling mold on the flat aluminum sheath cable in the present invention;

[0042] Figure 3 It is a structural schematic diagram of the flat aluminum sleeve in the present invention being expanded by means of a diameter expansion tool, and the assembly position of a cooling mold on a flat aluminum sleeve cable;

[0043] Figure 4 It is a structural schematic diagram of the cooling mold in the present invention;

[0044] Figure 5 It is a structural schematic diagram of the first cross section of the cooling mold in the present invention;

[0045] Figure 6 It is a structural schematic diagram of the second cross section of the cooling mold in the present invention;

[0046] Figure 7 This is a schematic diagram of the structure of the cooling mold connected to the circulation pipe in the present invention;

[0047] Figure 8 This is a schematic diagram of the structure of a conventional flat aluminum sheathed cable. DETAILED DESCRIPTION

[0048] 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0049] Example 1, see Figure 8 .

[0050] It is noted that, in order to facilitate a clear understanding of the specific structure of the flat aluminum sheath cable, in this embodiment, a conventional flat aluminum sheath cable is listed, and the specific structure is as follows:

[0051] A flat aluminum sheathed cable 100 includes a conductor 110, and a conductor shielding layer 120, an insulating layer 130, an insulating shielding layer 140, a buffer layer 150, a flat aluminum sheath 160, a hot melt adhesive layer 170, and an outer sheath layer 180 which are sequentially wrapped around the outside of the conductor 110 from the inside to the outside.

[0052] Example 2, see Figure 1-7 .

[0053] In view of the problems mentioned in the above background technology, an embodiment of the present invention provides a method for expanding and cooling a flat aluminum sheathed cable to solve the above technical problems. The technical solution is as follows:

[0054] A method for expanding and cooling a flat aluminum sheathed cable comprises the following steps:

[0055] Take the flat aluminum sheathed cable 100 to be installed, and align and straighten the installation side position section of the flat aluminum sheathed cable 100;

[0056] The outer sheath 180 and the flat aluminum sheath 160 on the installation side of the flat aluminum sheath cable 100 are removed, and the removal length of the outer sheath 180 is greater than the removal length of the flat aluminum sheath 160;

[0057] The position section where the length of the outer sheath 180 removed is greater than the length of the flat aluminum sheath 160 removed is used to assemble the cooling mold 300; the position section of the flat aluminum sheath 160 exposed after the outer sheath 180 is removed needs to be cleaned of the hot melt adhesive on the surface of the flat aluminum sheath 160;

[0058] A layer of PVC tape is wrapped around the exposed buffer layer 150 after the flat aluminum sheath 160 is removed from the flat aluminum sheath cable 100;

[0059] The expansion process requires hitting the expansion tool on the cable with a hammer or other tools. Before the expansion operation, wrap the PVC tape around the buffer layer 150 position. The smooth surface of PVC can reduce the movement resistance of the expansion tool on the cable and avoid irreparable damage to the buffer layer caused by misoperation.

[0060] The diameter of the pipe opening of the flat aluminum sleeve 160 is expanded and the pipe opening is expanded into a trumpet-shaped structure;

[0061] Among them, the diameter expansion operation is mainly performed with the aid of a diameter expansion tool, such as the diameter expansion device disclosed in the patent application number CN202320690648.0, and the patent name is a smooth aluminum cable diameter expansion device;

[0062] The trumpet-shaped structure position of the flat aluminum sleeve 160 is polished to remove sharp corner burrs, and the trumpet-shaped structure position of the flat aluminum sleeve 160 and the impurities and dust on the surface of the PVC belt are cleaned;

[0063] If the burrs are not handled, partial discharge may occur during subsequent power-on, causing damage to the cable body and accessories.

[0064] The PVC tape wrapped around the surface of the buffer layer 150 is removed, and then a layer of semi-conductive tape is tightly wrapped around the surface of the buffer layer 150;

[0065] The operation here is to prevent the buffer layer 150 from loosening, and the PVC tape is replaced with a semi-conductive tape because the electrical properties of PVC are not as good as those of the semi-conductive tape;

[0066] A thermocouple 600 is arranged inside the trumpet-shaped tube mouth of the flat aluminum sleeve 160, and then the amplified aluminum tube 500 is sleeved on the installation side of the flat aluminum sleeve cable 100 and pushed onto the trumpet-shaped tube mouth of the flat aluminum sleeve 160; the thermocouple 600 is used to monitor the temperature at the cable welding point;

[0067] A waterproof tape layer is wrapped around the break position 210 of the outer sheath 180 and the installation side port position 220 of the flat aluminum sheath cable 100, and the wrapped waterproof tape layer is sealed with a plastic wrap;

[0068] The waterproof tape layer is wrapped around the break position 210 and the port position 220, and the plastic wrap is used to seal it because the internal sections of the cable at the break position 210 and the port position 220 are all open. If no sealing treatment is performed, water vapor and impurities will enter the cable structure through the sections, which will affect the life of the cable and its electrical performance;

[0069] A cooling mold 300 is installed on the flat aluminum sleeve 160 near the trumpet-shaped pipe mouth of the flat aluminum sleeve 160;

[0070] The cooling mold 300 is in operation, and then a welding operation is performed at the butt joint position of the trumpet-shaped pipe opening of the enlarged aluminum tube 500 and the flat aluminum sleeve 160 .

[0071] As a preferred embodiment of the present invention, in the step of aligning and straightening the installation side position section of the flat aluminum sheathed cable 100, it is necessary to use a straightening tool for straightening, and during the straightening process, it is necessary to perform insulation heating at 85-90°C for 8 hours, and after the insulation heating, it is necessary to perform natural cooling operation for not less than 12 hours.

[0072] It should be noted that the cable is bent into a drum for transportation. After the cable is laid, the cable still has a certain degree of curvature, which has a negative impact on the installation of accessories, so the cable needs to be straightened. The straightening method can use four angle steels, fix the four angle steels on the cable and heat them to make it straight, which is convenient for subsequent installation. Heating is used to eliminate the internal stress of the conductor to prevent rebound when cooling.

[0073] After the cable is straightened and heated, the cable still has a certain amount of heat. When the cable is hot, the material is soft and the cable is fragile, making construction difficult. If forced construction is performed, it may cause unnecessary damage to the cable body. Therefore, the cable needs to be cooled naturally before installing cable accessories.

[0074] As a preferred embodiment of the present invention, in the step of aligning and straightening the installation side position section of the flat aluminum sheathed cable 100, the curvature of the straightened cable is guaranteed to be no greater than 3 mm per 600 mm.

[0075] As a preferred embodiment of the present invention, the diameter of the enlarged aluminum tube 500 is greater than the diameter of the flat aluminum sleeve 160; the maximum diameter of the trumpet-shaped tube opening of the flat aluminum sleeve 160 is 5 mm smaller than the diameter of the enlarged aluminum tube 500; Figure 2 As shown, the maximum diameter of the trumpet-shaped tube mouth of the flat aluminum sleeve 160 is set to be 5 mm smaller than the diameter of the enlarged aluminum tube 500, so that the notch 230 at the docking position between the trumpet-shaped tube mouth of the flat aluminum sleeve 160 and the enlarged aluminum tube 500 forms a welding point between the flat aluminum sleeve 160 and the enlarged aluminum tube 500.

[0076] As a preferred embodiment of the present invention, after the amplified aluminum tube 500 is welded to the flat aluminum sheath 160, the waterproof tape layer and the plastic wrap at the break position 210 of the outer sheath 180 and the installation side port position 220 of the flat aluminum sheath cable 100 are removed, and then the cable accessories are installed at the end of the amplified aluminum tube 500.

[0077] As a preferred embodiment of the present invention, the cooling mold 300 includes an upper clamp, a lower clamp, a bolt 330, and a circulation pipe 340;

[0078] The upper clamp includes an upper arc-shaped clamping plate 310 and upper connecting plates 311 fixed on both sides of the upper arc-shaped clamping plate 310;

[0079] An upper arc-shaped cavity 310a is provided inside the upper arc-shaped clamping plate 310, and an upper liquid inlet 313 and an upper liquid outlet 314 communicating with the upper arc-shaped cavity 310a are respectively provided on both sides of the plate wall of the upper arc-shaped clamping plate 310;

[0080] The lower clamp includes a lower arc-shaped clamping plate 320 and lower connecting plates 321 fixed on both sides of the lower arc-shaped clamping plate 320;

[0081] A lower arc-shaped cavity 320a is provided inside the lower arc-shaped clamping plate 320, and a lower liquid inlet 323 and a lower liquid outlet 324 communicating with the lower arc-shaped cavity 320a are respectively provided on both sides of the plate wall of the lower arc-shaped clamping plate 320;

[0082] The upper liquid outlet 314 and the lower liquid inlet 323 are connected via a circulation pipe 340;

[0083] The upper connecting plates 311 and the lower connecting plates 321 on both sides of the upper clamp and the lower clamp are butted against each other and are locked by bolts 330 .

[0084] As a preferred embodiment of the present invention, an upper through hole 312 is provided on the upper connecting plate 311, and a lower through hole coaxial with the upper through hole 312 is provided on the lower connecting plate 321; a bolt 330 passes through the upper through hole 312 and the lower through hole, and a nut is connected at the tail of the bolt 330 for locking; tightening the nut can fix the cooling mold 300 at the cooling position of the cable, and removing the nut can remove the cooling mold 300 from the cable.

[0085] As a preferred embodiment of the present invention, the upper liquid outlet 314 of the upper fixture and the lower liquid inlet 323 of the lower fixture are located on the same side of the cooling mold 300 .

[0086] As a preferred embodiment of the present invention, the upper liquid inlet 313 of the upper fixture and the lower liquid outlet 324 of the lower fixture are respectively connected to an external coolant circulation machine through pipelines.

[0087] As a preferred embodiment of the present invention, the upper clamp and the lower clamp are made of copper; the thermal conductivity of copper is 386.4w / (mk), which has excellent thermal conductivity; the upper arc clamp 310 of the upper clamp and the lower arc clamp 320 of the lower clamp are clamped on the flat aluminum sleeve 160;

[0088] Copper strips are attached between the upper arc clamping plate 310, the lower arc clamping plate 320 and the flat aluminum sleeve 160; thermal conductive silicone grease is applied to the upper and lower surfaces of the copper strips; the thermal conductive silicone grease is evenly applied to the surface of the copper strips, so as to achieve the effect of complete fitting between the cooling mold and the flat aluminum sleeve.

[0089] It is explained that the working method of the cooling mold 300 is: the cooling mold 300 is assembled and fixed at the cooling position of the cable, and the upper liquid inlet 313 of the upper clamp and the lower liquid outlet 324 of the lower clamp are respectively connected to the coolant external circulation machine through pipelines; the coolant enters from the upper liquid inlet 313, circulates in the upper arc-shaped cavity 310a in the upper clamp, and then enters the lower clamp through the circulation pipe 340, and returns to the coolant external circulation machine from the lower liquid outlet 324 after circulating in the lower arc-shaped cavity 320a of the lower clamp, thereby realizing the circulation of the coolant and the cooling operation of the cable.

[0090] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0091] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0092] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and concept of the present invention, and all these changes or substitutions should fall within the protection scope of the claims attached to the present invention.

Claims

1. A method for expanding and cooling a flat aluminum sheathed cable, characterized in that: The following steps are involved: Take the flat aluminum sheath cable to be installed, and align and straighten the installation side section of the flat aluminum sheath cable; Remove the outer sheath and flat aluminum sheath on the installation side of the flat aluminum sheath cable, and the removal length of the outer sheath is greater than the removal length of the flat aluminum sheath; Wrap a layer of PVC tape around the exposed buffer layer section after removing the flat aluminum sheath from the flat aluminum sheath cable; The diameter of the pipe mouth of the flat aluminum sleeve is expanded and the pipe mouth is expanded into a trumpet-shaped structure; Grind the trumpet-shaped structure of the flat aluminum sleeve to remove sharp corners and burrs, and clean the impurities and dust on the trumpet-shaped structure of the flat aluminum sleeve and the surface of the PVC belt; Remove the PVC tape wrapped around the surface of the buffer layer, and then tightly wrap a layer of semi-conductive tape around the surface of the buffer layer; A thermocouple is arranged inside the trumpet-shaped tube mouth of the flat aluminum sleeve, and then an amplified aluminum tube is sleeved on the installation side of the flat aluminum sleeve cable and pushed onto the trumpet-shaped tube mouth of the flat aluminum sleeve; Wrap a waterproof tape layer around the outer sheath break position and the installation side port position of the flat aluminum sheath cable, and seal the wrapped waterproof tape layer with plastic wrap; A cooling mold is installed on the flat aluminum sleeve near the trumpet-shaped pipe mouth of the flat aluminum sleeve; The cooling mold works, and then the welding operation is performed at the butt joint of the trumpet-shaped pipe mouth of the amplified aluminum tube and the flat aluminum sleeve.

2. The method for expanding and cooling a flat aluminum sheathed cable according to claim 1 is characterized in that: In the steps of aligning and straightening the installation side position section of the flat aluminum sheathed cable, a straightening tool is required for straightening. During the straightening process, 8 hours of insulation heating at 85-90°C is required, and after insulation heating, natural cooling operation for not less than 12 hours is required.

3. The method for expanding and cooling a flat aluminum sheathed cable according to claim 1, characterized in that: In the step of aligning and straightening the installation side position section of the flat aluminum sheathed cable, the curvature of the cable after straightening is guaranteed to be no more than 3 mm per 600 mm.

4. The method for expanding and cooling a flat aluminum sheathed cable according to claim 1, characterized in that: The diameter of the amplified aluminum tube is greater than that of the flat aluminum sleeve; the maximum diameter of the trumpet-shaped tube mouth of the flat aluminum sleeve is 5 mm smaller than that of the amplified aluminum tube.

5. The method for expanding and cooling a flat aluminum sheathed cable according to claim 1, characterized in that: After welding the amplified aluminum tube and the flat aluminum sheath, it is necessary to remove the waterproof tape layer and plastic wrap at the fracture position of the outer sheath and the installation side port position of the flat aluminum sheath cable, and then install the cable accessories at the end of the amplified aluminum tube.

6. The method for expanding and cooling a flat aluminum sheathed cable according to claim 1, characterized in that: The cooling mold includes an upper clamp, a lower clamp, bolts, and a circulation pipe; The upper clamp comprises an upper arc-shaped clamping plate and upper connecting plates fixed on both sides of the upper arc-shaped clamping plate; An upper arc-shaped cavity is arranged inside the upper arc-shaped clamping plate, and an upper liquid inlet and an upper liquid outlet communicating with the upper arc-shaped cavity are arranged on both sides of the plate wall of the upper arc-shaped clamping plate; The lower clamp comprises a lower arc-shaped clamping plate and lower connecting plates fixed on both sides of the lower arc-shaped clamping plate; A lower arc-shaped cavity is arranged inside the lower arc-shaped clamping plate, and a lower liquid inlet and a lower liquid outlet communicating with the lower arc-shaped cavity are arranged on both sides of the plate wall of the lower arc-shaped clamping plate; The upper liquid outlet and the lower liquid inlet are connected through a circulation pipe; The upper connecting plates and the lower connecting plates on both sides of the upper clamp and the lower clamp are butted against each other and locked by bolts.

7. The method for expanding and cooling a flat aluminum sheathed cable according to claim 6, characterized in that: An upper through hole is arranged on the upper connecting plate, and a lower through hole coaxial with the upper through hole is arranged on the lower connecting plate; bolts are passed through the upper through hole and the lower through hole, and nuts are connected at the tail of the bolts for locking.

8. The method for expanding and cooling a flat aluminum sheathed cable according to claim 6, characterized in that: The upper liquid outlet of the upper fixture and the lower liquid inlet of the lower fixture are located on the same side of the cooling mold.

9. The method for expanding and cooling a flat aluminum sheathed cable according to claim 6, characterized in that: The upper liquid inlet of the upper fixture and the lower liquid outlet of the lower fixture are connected to the external coolant circulation machine through pipelines respectively.

10. The method for expanding and cooling a flat aluminum sheathed cable according to claim 6, characterized in that: The upper clamp and the lower clamp are both made of copper; the upper arc-shaped clamp of the upper clamp and the lower arc-shaped clamp of the lower clamp are clamped on the flat aluminum sleeve; copper strips are attached between the upper arc-shaped clamp, the lower arc-shaped clamp and the flat aluminum sleeve; the upper and lower surfaces of the copper strips are coated with thermal conductive silicone grease.

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