Crosslinking and vulcanization process for new energy cable production

Abstract

The application discloses a cross-linking vulcanization process for new energy cable production and relates to the technical field of new energy cable production.The process comprises the preparation and pretreatment of raw materials, the extrusion coating of a conductor to form an insulation layer, the cutting of the cable, a hot vulcanization reaction, cooling and shaping, post-treatment and detection; the process is good in sealing, so that gaseous by-products generated during the cross-linking of peroxides cannot escape, the cross-linking is relatively uniform, and proper pressure ensures that the insulation layer is in close contact with the mold, so that the cross-linking degree is consistent, the conductor of the cable is not damaged, the sealing state in the placement hole can be switched, or the cable is fixed in a fixed sleeve, the ends of two cable sections are fixed in the fixed sleeve, the cable head and the cable tail are fixed by the fixed sleeve, the cable is prevented from being deformed during the process, the insulation skin of the cable in the placement hole is ensured, and efficient and stable cross-linking reaction of the new energy cable can be realized.

Description

Technical Field

[0001] This invention relates to the field of new energy cable production technology, specifically to a cross-linking vulcanization process used in the production of new energy cables. Background Technology

[0002] In the production of new energy cables, the vulcanization process is mainly used to cross-link the insulation layer, improving its heat resistance, mechanical strength, and electrical performance. Common methods include chemical vulcanization, radiation cross-linking, and silane cross-linking. These methods involve adding peroxides to the insulation material, using high-temperature decomposition of free radicals to initiate molecular chain cross-linking, forming a three-dimensional network structure. After vulcanization, the cable exhibits high temperature resistance, aging resistance, and high current carrying capacity, making it suitable for new energy fields such as photovoltaics and wind power. The process requires strict control of temperature, time, and cross-linking agent dosage to avoid over- or under-vulcanization.

[0003] In existing technologies, when cross-linking vulcanization is used in the production of new energy cables, poor sealing may cause gaseous byproducts generated during the cross-linking of peroxides to escape, resulting in uneven cross-linking and affecting the density of the insulation layer. If the pressure is too low, the insulation layer will not make tight contact with the mold, resulting in uneven heat transfer and inconsistent degree of cross-linking. Air bubbles may remain inside the material. If the pressure is too high, it will cause the insulation layer to deform, resulting in uneven thickness and even damage to the conductor. Summary of the Invention

[0004] The purpose of this invention is to provide a cross-linking vulcanization process for the production of new energy cables, so as to solve the problems mentioned in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] The cross-linking vulcanization process used in the production of new energy cables includes the following steps:

[0007] S1. Preparation and pretreatment of raw materials: Select rubber as the main material, add vulcanizing agent, accelerator and antioxidant, and dry the raw materials.

[0008] S2. Extrusion coating of conductor to form an insulation layer: The main material and additives are put into an internal mixer and mixed at a specific temperature to make the main material and additives evenly dispersed. Then, the compound is extruded through an extruder to coat the conductor.

[0009] S3. Cut the cable: Cut the cable with a cutting device, and use clamps to press and fix the cable head and cable tail to ensure that the cable does not deform during the process;

[0010] S4. Thermal vulcanization reaction: First, the raw materials are placed in the flat vulcanizing machine and the upper and lower pressure plates are initially heated. During the initial heating, a sealed structure is used for sealing. Then, the cable is passed through the upper and lower pressure plates and the main material and additives are heated by electric heating wires so that the surface temperature of the cable reaches the vulcanization temperature. The pressure holding device is used to reduce the temperature loss between the upper and lower pressure plates, so that the vulcanizing agent and the polymer chain undergo a cross-linking reaction.

[0011] S5. Cooling and Shaping: After vulcanization, the cable is cooled by circulating water cooling tank. It is first transitioned in warm water and then quickly shaped with cold water to prevent internal stress caused by sudden cooling.

[0012] S6. Post-processing and inspection: After vulcanization, the cable undergoes stripping and finished product inspection to complete the entire manufacturing process.

[0013] As a preferred embodiment of the present invention, the flat vulcanizing machine is arranged from top to bottom in the middle of a top plate, an upper pressure plate, a lower pressure plate, and a push plate. Three sets of cylinders are arranged inside the flat vulcanizing machine and below the push plate. The output end of the middle cylinder contacts the bottom end of the push plate. The electric heating wire is located at the contact point between the upper and lower pressure plates. The sealing structure is located at the contact point between the upper and lower pressure plates. The sealing structure includes a placement hole, which is opened at the contact point between the upper and lower pressure plates, and the electric heating wire is located outside the placement hole. First reserved grooves are provided on both sides of the upper and lower pressure plates. First and second fixing blocks are arranged inside the two sets of first reserved grooves. The first and second fixing blocks form a cylindrical shape. The two sets of second fixing blocks are aligned with the two ends of the placement hole. The two sets of second fixing blocks are used to seal the pre-heated hot gas in step S4.

[0014] As a preferred technical solution of the present invention, the first fixing block and the second fixing block are rotatably connected inside the first reserved groove. Fixing sleeves are provided at the mating surfaces of the two sets of first fixing blocks and second fixing blocks. The positions of the two fixing sleeves correspond to the two ends of the placement hole. The two fixing sleeves are used to fix the two ends of the cable placed on the upper pressure plate in S4.

[0015] As a preferred embodiment of the present invention, the first reserved groove of the first fixing block and the first reserved groove of the second fixing block are arranged in a complete circle. The mating surfaces of the first fixing block and the second fixing block are respectively provided with connecting posts and connecting holes, and the connecting posts of the first fixing block and the connecting holes of the second fixing block are engaged.

[0016] As a preferred embodiment of the present invention, a second reserved groove is provided on the mating surface of the first fixing block and the second fixing block, and the fixing sleeve is located inside the second reserved groove. The second reserved groove is used to fix the fixing sleeve, and the inner diameter of the fixing sleeve is adapted to the outer diameter of the cable.

[0017] As a preferred embodiment of the present invention, square grooves are provided at the rotation axis positions of the two second fixed blocks, and a rotating shaft and a square column are integrally arranged at the rotation axis positions of the two second fixed blocks. The two square columns are located at the two ends of the rotating shaft and are located inside the square grooves of the two second fixed blocks. The rotating shaft is rotatably connected to the interior of the lower pressure plate. The rotating shaft and the square column are used to rotate the two second fixed blocks synchronously.

[0018] As a preferred embodiment of the present invention, the pressure-holding device is located at both ends of the placement hole. The pressure-holding device includes two sets of venting grooves and two sets of reserved cavities opened at both ends of the placement hole. The venting grooves and reserved cavities are interconnected. A first gear is sleeved outside the rotating shaft and inside the venting groove. A second gear is rotatably connected to the top of the reserved cavity. The second gear meshes with the first gear. A rack is slidably connected to one side of the reserved cavity. The rack meshes with the second gear. A lifting plate and a fixing plate are provided on one side of the rack and inside the reserved cavity. The distance between the lifting plate and the fixing plate is used to squeeze hot air into the placement hole, thereby reducing the temperature loss inside the flat vulcanizing machine in S4.

[0019] As a preferred embodiment of the present invention, the lifting plate is welded to the middle of the rack, and the rack and the lifting plate move up and down synchronously. The lifting plate is used to push the airflow in the reserved cavity into the placement hole. The fixing plate is welded to the bottom of the reserved cavity. The fixing plate and the rack form a sealed space. A ventilation channel is provided between the inside of the reserved cavity and the inside of the placement hole.

[0020] As a preferred embodiment of the present invention, both ends of the placement hole and one side of the first gear are provided with a first fixing ring and a second fixing ring. The first fixing ring and the second fixing ring are arranged in a ring, and the first fixing ring moves synchronously with the upper pressure plate, while the second fixing ring moves synchronously with the lower pressure plate.

[0021] As a preferred embodiment of the present invention, in step S4, the heating temperature range of the electric heating wire is 100-220℃, the vulcanization pressure is 16-18MPa, and the holding time is 35-40min. In step S5, the temperature range of the warm water transition stage is 60-80℃, and the temperature range of the cold water rapid setting stage is 20-30℃.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] During the initial heating phase of the hot vulcanization reaction, a sealed structure is used for sealing. A pressure-holding device is used to reduce the temperature loss between the upper and lower pressure plates. Good sealing will prevent the gaseous byproducts generated during peroxide crosslinking from escaping, resulting in more uniform crosslinking and ensuring the density of the insulation layer. Appropriate pressure will ensure that the insulation layer is in close contact with the mold, resulting in uniform heat transfer, consistent crosslinking degree, no residual air bubbles inside the material, and no damage to the cable conductor.

[0024] Equipped with a sealing structure, the first and second fixing blocks can be rotated, and the end of the placement hole can be aligned with the fixing sleeve and the second fixing block, thereby switching the sealing state in the placement hole or switching to the fixing sleeve to fix the cable.

[0025] After the first and second fixing blocks close, they compress and deform the fixing sleeve, which can fix the ends of the two cable sections inside the fixing sleeve. The cable head and cable tail are fixed by pressure with the fixing sleeve to ensure that the cable will not deform during the process.

[0026] Equipped with a pressure-holding device, the lifting plate can be raised and lowered using a rack and pinion mechanism, which can change the volume inside the reserved cavity and alter the air pressure between the reserved cavity and the placement hole. This ensures that the cable insulation inside the placement hole can achieve an efficient and stable cross-linking reaction for new energy cables. Attached Figure Description

[0027] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 This is a process flow diagram of the present invention;

[0029] Figure 2 This is a structural diagram of the main body of the present invention;

[0030] Figure 3 This is a schematic diagram of the upper and lower pressure plates of the present invention;

[0031] Figure 4 This is a schematic diagram of the sealing structure of the present invention;

[0032] Figure 5 This is a schematic diagram showing the alignment of the second fixing block with the placement hole according to the present invention;

[0033] Figure 6 This is a schematic diagram showing the separation of the first fixing block and the second fixing block of the present invention;

[0034] Figure 7 This is a schematic diagram of the pressure-holding device of the present invention;

[0035] Figure 8 For the present invention Figure 7 Enlarged view of point A;

[0036] Figure 9 This is a schematic diagram of the first gear and rotating shaft of the present invention.

[0037] In the diagram: 1. Flat vulcanizing machine; 2. Push plate; 3. Top plate; 4. Upper pressure plate; 5. Lower pressure plate; 6. Sealing structure; 7. Pressure holding device; 8. Electric heating wire; 9. Cylinder; 61. First reserved groove; 62. First fixing block; 63. Second fixing block; 64. Second reserved groove; 65. Fixing sleeve; 66. Rotating shaft; 67. Placement hole; 68. Connecting column; 69. Connecting hole; 610. Square column; 611. Square groove; 71. Ventilation groove; 72. First gear; 73. Second gear; 74. Reserved cavity; 75. Rack; 76. Lifting plate; 77. Fixing plate; 78. First fixing ring; 79. Second fixing ring. Detailed Implementation

[0038] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1:

[0039] Please see Figure 1 As shown, the cross-linking vulcanization process used in the production of new energy cables includes the following steps:

[0040] S1. Raw material preparation and pretreatment: Rubber is selected as the main material, and vulcanizing agents, accelerators and antioxidants are added. The raw materials are dried. The type of rubber is determined according to the application scenario of the new energy cable. For example, the new energy vehicle cable needs to be both oil-resistant and resistant to high and low temperatures. If the rubber and additives contain moisture, bubbles will be generated during the vulcanization process, which will cause voids in the cable insulation layer and affect the electrical performance. By strictly controlling the preparation and pretreatment of raw materials, it can be ensured that the cross-linked vulcanized cable has excellent electrical performance, mechanical properties and aging resistance, which meets the high reliability requirements of new energy vehicles.

[0041] S2. Extrusion coating of conductor to form insulation layer: The main material and additives are put into the internal mixer and mixed at a specific temperature to make the main material and additives evenly dispersed. Then, the compound is extruded through the extruder to coat the conductor. Extrusion coating is the core link of the cross-linking vulcanization process. Its process stability directly affects the insulation performance and mechanical strength of the cable. By precisely controlling the mixing parameters, extrusion temperature and traction system, high reliability and high consistency of new energy cables can be achieved in industrial production, meeting the stringent requirements of the new energy vehicle field.

[0042] S3. Cut the cable: Cut the cable with a cutting device and fix the cable head and cable tail with clamps to ensure that the cable will not deform during the process. Cutting and fixing are post-processing steps of cross-linking vulcanization, and their precision directly affects the installation compatibility and vulcanization quality of the finished cable.

[0043] S4. Thermal vulcanization reaction: First, the raw materials are placed in the flat vulcanizing machine 1 and the upper pressure plate 4 and lower pressure plate 5 are initially heated. During the initial heating, a sealing structure 6 is used for sealing. Then, the cable is passed through the upper pressure plate 4 and lower pressure plate 5 and the main material and additives are heated by the electric heating wire 8 so that the surface temperature of the cable reaches the vulcanization temperature. The pressure holding device 7 is used to reduce the temperature loss between the upper pressure plate 4 and lower pressure plate 5, so that the vulcanizing agent and the polymer chain undergo a cross-linking reaction. As the core link of the cross-linking vulcanization process, the temperature control accuracy, sealing effect and reaction time of the thermal vulcanization reaction directly determine the physical and chemical properties of the cable insulation layer. By optimizing the structure of the vulcanization equipment, accurately controlling the temperature curve and introducing an intelligent monitoring system, the efficient and stable cross-linking reaction of new energy cables can be achieved.

[0044] S5. Cooling and Shaping: After vulcanization, the cable is cooled by circulating water cooling tank. It is first transitioned in warm water and then quickly shaped with cold water to prevent internal stress caused by sudden cooling. As the final step of the cross-linking vulcanization process, the temperature gradient control and cooling time management of cooling and shaping directly affect the mechanical properties and dimensional stability of the cable. Through segmented cooling tank design, precise water temperature control and intelligent management, the internal stress of new energy cables after vulcanization can be effectively eliminated.

[0045] S6. Post-processing and testing: After vulcanization, the cable undergoes stripping and finished product inspection to complete the entire manufacturing process. Post-processing and testing, as the final step in the manufacturing of new energy cables, involves precise stripping technology, multi-dimensional performance testing, and intelligent quality control.

[0046] Please see Figure 2 - Figure 6As shown, the flat vulcanizing machine 1 has a top plate 3, an upper pressure plate 4, a lower pressure plate 5, and a push plate 2 arranged sequentially from top to bottom in the middle. Inside the flat vulcanizing machine 1, below the push plate 2, are three sets of cylinders 9. The output end of the middle cylinder 9 contacts the bottom end of the push plate 2. Electric heating wires 8 are located at the contact point between the upper pressure plate 4 and the lower pressure plate 5. Raising and lowering the cylinders 9 pushes the push plate 2, which in turn raises and lowers the lower pressure plate 5, thus bringing the upper pressure plate 4 and the lower pressure plate 5 together. After the upper pressure plate 4 and the lower pressure plate 5 are together, the two sets of electric heating wires 8 can be brought close together to heat them, melting the rubber particles between the upper pressure plate 4 and the lower pressure plate 5, facilitating the subsequent vulcanization process. A sealing structure 6 is located at the contact point between the upper pressure plate 4 and the lower pressure plate 5. The sealing structure 6 includes a placement hole 67, which is located at the contact point between the upper pressure plate 4 and the lower pressure plate 5. The electric heating wire 8 is located outside the placement hole 67. Some rubber particles are placed inside the placement hole 67 so that the rubber particles are put into the placement hole 67 for preliminary melting. The upper pressure plate 4 and the lower pressure plate 5 are provided with first reserved grooves 61 on both sides. The two sets of first reserved grooves 61 are provided with first fixing blocks 62 and second fixing blocks 63. The first fixing blocks 62 and second fixing blocks 63 form a cylinder. The two sets of second fixing blocks 63 are aligned with the two ends of the placement hole 67. The two sets of second fixing blocks 63 are used to seal the hot gas that is initially heated in S4. The first fixing blocks 62 and second fixing blocks 63 are rotated so that the second fixing blocks 63 face the end of the placement hole 67. After sealing the rubber inside the placement hole 67, the electric heating wire 8 is used to preliminarily heat the inside of the placement hole 67, which facilitates the subsequent placement of the cable inside the placement hole 67 for vulcanization treatment.

[0047] Please see Figure 2 - Figure 6 As shown, the first fixing block 62 and the second fixing block 63 are rotatably connected inside the first reserved groove 61. Fixing sleeves 65 are provided at the mating surfaces of the two sets of first fixing blocks 62 and second fixing blocks 63. The positions of the two fixing sleeves 65 correspond to the two ends of the placement hole 67. The two fixing sleeves 65 are used to fix the two ends of the cable placed on the upper pressure plate 4 in S4. The two sections of new energy cable can be placed inside the placement hole 67, and the ends of the new energy cable are fixed by the fixing sleeves 65 to prevent the ends of the new energy cable from loosening. The ends of the two sections of new energy cable are connected. At this time, the connector can be placed in the middle of the placement hole 67. The placement hole 67 is heated by two sets of electric heating wires 8, so that the originally linear molecular chains are connected by chemical bonds to form a three-dimensional network structure, and the rubber is filled into the interior of the placement hole 67.

[0048] Please see Figure 5 and Figure 6As shown, the first reserved groove 61 of the first fixing block 62 and the first reserved groove 61 of the second fixing block 63 are arranged in a complete circle, so that the first fixing block 62 and the second fixing block 63 can rotate inside the first reserved groove 61, thereby rotating the first fixing block 62 and the second fixing block 63 to a suitable position, with the second fixing block 63 aligned with the placement hole 67 or the first fixing block 62 aligned with the placement hole 67. The mating surfaces of the first fixing block 62 and the second fixing block 63 are respectively provided with connecting posts 68 and connecting holes 69. The connecting posts 68 of the first fixing block 62 and the connecting holes 69 of the second fixing block 63 can be engaged, so that the connecting posts 68 of the first fixing block 62 can be engaged inside the connecting holes 69 of the second fixing block 63, thereby fixing the new energy cable between the first fixing block 62 and the second fixing block 63. This can straighten the two sections of cable and wrap the cable with a three-dimensional mesh rubber outer sheath.

[0049] Please see Figure 5 and Figure 6 As shown, a second reserved groove 64 is provided on the mating surface of the first fixing block 62 and the second fixing block 63. The fixing sleeve 65 is located inside the second reserved groove 64. The second reserved groove 64 is used to fix the fixing sleeve 65. The inner diameter of the fixing sleeve 65 is adapted to the outer diameter of the cable. The two ends of the cable are connected together, so that the connector is placed in the middle of the placement hole 67. The ends of the two cables are clamped between the first fixing block 62 and the second fixing block 63, so that the fixing sleeve 65 undergoes a slight deformation, thereby deforming the cable fixing sleeve 65 and fixing the cable inside the fixing sleeve 65.

[0050] Please see Figure 6 As shown, square grooves 611 are provided at the rotation axis positions of the two second fixing blocks 63. A rotating shaft 66 and a square post 610 are integrally arranged at the rotation axis positions of the two second fixing blocks 63. The two square posts 610 are located at the two ends of the rotating shaft 66, and the two square posts 610 are located inside the square grooves 611 of the two second fixing blocks 63. The rotating shaft 66 is rotatably connected to the interior of the lower pressure plate 5. The rotating shaft 66 and the square posts 610 are used to rotate the two second fixing blocks 63 synchronously. The ends of the square posts 610 can be rotated, thereby rotating the first fixing block 62 and the second fixing block 63. This allows the fixing sleeve 65 to be aligned with the placement hole 67, so that the cable can be placed inside the fixing sleeve 65; or the second fixing block 63 can be aligned with the placement hole 67 to seal the placement hole 67.

[0051] Please see Figure 2 , Figure 7 - Figure 9As shown, the pressure-holding device 7 is located at both ends of the placement hole 67. The pressure-holding device 7 includes two sets of venting grooves 71 and two sets of reserved cavities 74 opened at both ends of the placement hole 67. The venting grooves 71 and the reserved cavities 74 are interconnected. A first gear 72 is sleeved outside the rotating shaft 66 and inside the venting groove 71. A second gear 73 is rotatably connected to the top of the reserved cavity 74. The second gear 73 meshes with the first gear 72. A rack 75 is slidably connected to one side of the reserved cavity 74. The rack 75 meshes with the second gear 73. The cylinder 9 in the middle pushes the push plate 2 and the lower pressure plate 5, and the cylinders 9 on both sides push the rack 75, thereby the rack 75 drives the second gear 73. The first gear 72 and the second gear 73 mesh. The first gear 72 rotates at a certain angle, and the limiting block inside the first gear 72 drives the limiting block outside the rotating shaft 66 to rotate, thereby rotating the rotating shaft 66. A lifting plate 76 and a fixing plate 77 are provided on one side of the rack 75 and inside the reserved cavity 74. The distance between the lifting plate 76 and the fixing plate 77 is used to squeeze hot air into the placement hole 67, thereby reducing the temperature loss inside the flat vulcanizing machine 1 in S4. When the rack 75 is raised and lowered, the lifting plate 76 can be raised and lowered, which can squeeze the air in the reserved cavity 74 into the placement hole 67, thus ensuring the air pressure inside the placement hole 67.

[0052] Please see Figure 7 - Figure 9 As shown, the lifting plate 76 is welded to the middle of the rack 75. The rack 75 and the lifting plate 76 rise and fall synchronously. The lifting plate 76 is used to push the airflow in the reserved cavity 74 into the placement hole 67. The fixing plate 77 is welded to the bottom of the reserved cavity 74. The fixing plate 77 and the rack 75 form a sealed space. The bottom of the rack 75 is slidably connected to the inside of the lower pressure plate 5, which can also prevent airflow from being injected into the reserved cavity 74. A ventilation channel is provided between the inside of the reserved cavity 74 and the inside of the placement hole 67. When the lifting plate 76 rises inside the reserved cavity 74, it can squeeze the air inside the reserved cavity 74 into the placement hole 67. When the lifting plate 76 descends inside the reserved cavity 74, it can increase the volume of the placement hole 67 and the reserved cavity 74, thereby adjusting the air pressure inside the placement hole 67.

[0053] Please see Figure 7 and Figure 8 As shown, both ends of the placement hole 67 and one side of the first gear 72 have a first fixing ring 78 and a second fixing ring 79. The first fixing ring 78 and the second fixing ring 79 are arranged in a ring. The first fixing ring 78 moves synchronously with the upper pressure plate 4, and the second fixing ring 79 moves synchronously with the lower pressure plate 5. After the upper pressure plate 4 and the lower pressure plate 5 are closed, the first fixing ring 78 on the upper pressure plate 4 and the second fixing ring 79 on the lower pressure plate 5 can be closed, thereby restricting the rubber inside the placement hole 67 from melting and flowing into the vent groove 71.

[0054] Please see Figure 1 As shown, the heating temperature range of the electric heating wire 8 in S4 is 100–220℃. 100℃ ensures the crosslinking agent begins to decompose effectively, avoiding low crosslinking degree and insufficient material mechanical properties due to insufficient temperature. 220℃ is used to prevent thermal degradation of the material due to excessive temperature, which could lead to problems such as molecular chain breakage, decreased insulation performance, or surface carbonization. The vulcanization pressure is 16–18 MPa. This high-pressure environment can eliminate air bubbles and voids in the cable insulation layer, allowing the polymer chains to be tightly arranged during the crosslinking process, increasing the material density, thereby enhancing insulation performance and voltage withstand strength. The holding time is 35–40 minutes. The cross-linking reaction requires sufficient time for the molecular chains to fully cross-link. If the holding time is too short, the degree of cross-linking will be insufficient, resulting in poor heat resistance and weak chemical corrosion resistance of the material. If it is too long, it will increase energy consumption and may cause material aging. The temperature range of the warm water transition stage in S5 is 60-80℃, which allows the material temperature to drop slowly, reduces the internal and external temperature difference, and allows the polymer chain segments time to adjust and arrange, reducing the accumulation of internal stress. The temperature range of the cold water rapid setting stage is 20-30℃, which allows the cross-linked polymer chain segments to freeze quickly, fix the three-dimensional network structure, and prevent the molecular chain rearrangement during the temperature drop process from causing changes in performance.

[0055] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A cross-linking and curing process for new energy cable production, characterized in that, The method comprises the following steps: S1, preparation and pretreatment of raw materials: select rubber as the main material, add vulcanizing agent, accelerator and antioxidant, dry the raw materials; S2, extruding the conductor to form an insulation layer: put the main material and the auxiliary agent into the internal mixer for mixing, so that the main material and the auxiliary agent are uniformly dispersed, and then extrude the mixed rubber through the extruder to coat the conductor; S3, cutting the cable: cut the cable by cutting equipment, press and fix the cable head and the cable tail with clamps to ensure that the cable does not deform during the process; S4, hot vulcanization reaction: first, put the raw materials into the flat vulcanizing machine (1), and then heat the upper pressing plate (4) and the lower pressing plate (5) initially, seal the sealing structure (6) during the initial heating, then heat the main material and the auxiliary agent by the electric heating wire (8) after the cable penetrates the inside of the upper pressing plate (4) and the lower pressing plate (5), so that the surface temperature of the cable reaches the vulcanization temperature, and the pressure maintaining device (7) is used to reduce the temperature loss between the upper pressing plate (4) and the lower pressing plate (5), so that the vulcanizing agent and the high molecular chain crosslinking reaction occurs; S5, cooling and shaping: after vulcanization, the cable is cooled by the circulating water cooling tank, first in warm water transition, and then in cold water rapid shaping to prevent internal stress caused by sudden cooling; S6, post-processing and detection: after vulcanization, the cable is subjected to the processes of stripping and finished product inspection, thereby completing the entire manufacturing process; The flat vulcanizing machine (1) is arranged from top to bottom with a top plate (3), an upper pressing plate (4), a lower pressing plate (5) and a push plate (2) in the middle, three groups of air cylinders (9) are arranged inside the flat vulcanizing machine (1) and below the push plate (2), the output end of the middle air cylinder (9) is in contact with the bottom end of the push plate (2), the electric heating wire (8) is arranged at the joint of the upper pressing plate (4) and the lower pressing plate (5), the sealing structure (6) is arranged at the joint of the upper pressing plate (4) and the lower pressing plate (5), the sealing structure (6) comprises a placement hole (67), the placement hole (67) is arranged at the joint of the upper pressing plate (4) and the lower pressing plate (5), and the electric heating wire (8) is located outside the placement hole (67), first reserved grooves (61) are arranged on both sides of the upper pressing plate (4) and the lower pressing plate (5), first fixed blocks (62) and second fixed blocks (63) are arranged inside the two first reserved grooves (61), the first fixed blocks (62) and the second fixed blocks (63) are in a cylindrical shape, the two second fixed blocks (63) are aligned with the two ends of the placement hole (67), and the two second fixed blocks (63) are used for sealing the hot air in the initial heating in S4.

2. The cross-linking curing process for new energy cable production according to claim 1, characterized in that, The first fixed blocks (62) and the second fixed blocks (63) are rotatably connected inside the first reserved grooves (61), fixed sleeves (65) are arranged at the joint surfaces of the two groups of first fixed blocks (62) and second fixed blocks (63), the positions of the two fixed sleeves (65) correspond to the two ends of the placement hole (67), and the two fixed sleeves (65) are used for fixing the two ends of the cable placed on the upper pressing plate (4) in S4.

3. The cross-linking and curing process for new energy cable production according to claim 2, characterized in that, The connecting column (68) of the first fixed block (62) is clamped with the connecting hole (69) of the second fixed block (63).

4. The cross-linking and curing process for new energy cable production according to claim 3, characterized in that, The second fixed block (63) is provided with a second reserved groove (64) on the abutting surface, and the fixed sleeve (65) is located in the second reserved groove (64), the second reserved groove (64) is used for fixing the fixed sleeve (65), and the inner diameter of the fixed sleeve (65) is matched with the outer diameter of the cable.

5. The cross-linking and curing process for new energy cable production according to claim 4, characterized in that, The rotating shaft (66) and the square column (610) are integrally arranged at the rotating axis of the two second fixed blocks (63), the two square columns (610) are located at the two ends of the rotating shaft (66), respectively, and the two square columns (610) are located in the square grooves (611) of the two second fixed blocks (63), respectively, the rotating shaft (66) is rotatably connected with the inside of the lower pressing plate (5), and the rotating shaft (66) and the square column (610) are used for synchronous rotation of the two second fixed blocks (63).

6. The cross-linking and curing process for new energy cable production according to claim 5, characterized in that, The pressure maintaining device (7) is arranged at the both ends of the placing hole (67), the pressure maintaining device (7) comprises two groups of air permeable grooves (71) and two groups of reserved cavities (74) arranged at the both ends of the placing hole (67), the air permeable grooves (71) and the reserved cavities (74) are communicated with each other, the first gear (72) is arranged on the outside of the rotating shaft (66) and in the air permeable groove (71), the second gear (73) is rotatably connected to the top of the reserved cavity (74), the second gear (73) is engaged with the first gear (72), the rack (75) is slidably connected to one side of the reserved cavity (74), the rack (75) is engaged with the second gear (73), the lifting plate (76) and the fixed plate (77) are arranged on one side of the rack (75) and in the reserved cavity (74), and the distance between the lifting plate (76) and the fixed plate (77) is used for extruding hot air into the placing hole (67), so as to reduce the temperature loss in the flat vulcanizing machine (1) in the S4.

7. The cross-linking and curing process for new energy cable production according to claim 6, characterized in that, The lifting plate (76) is welded in the middle of the rack (75), the rack (75) and the lifting plate (76) are synchronously lifted, the lifting plate (76) is used for pushing the airflow in the reserved cavity (74) to inject into the placing hole (67), the fixed plate (77) is welded at the bottom of the reserved cavity (74), the fixed plate (77) and the rack (75) form a closed space, and an air passage is arranged between the inside of the reserved cavity (74) and the inside of the placing hole (67).

8. The cross-linking and curing process for new energy cable production according to claim 7, characterized in that, The first fixed ring (78) and the second fixed ring (79) are arranged in a ring shape, the first fixed ring (78) moves synchronously with the upper pressing plate (4), and the second fixed ring (79) moves synchronously with the lower pressing plate (5).

9. The cross-linking and curing process for new energy cable production according to any one of claims 1-8, characterized in that, The temperature range of the electric heating wire (8) in the S4 is 100-220 ℃, the vulcanization pressure is 16-18 MPa, the pressure maintaining time is 35-40 min, the temperature range of the warm water transition stage in the S5 is 60-80 ℃, and the temperature range of the cold water rapid setting stage is 20-30 ℃.

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