Installation method and installation device for cable joint in photovoltaic power generation area

Abstract

The invention provides an installation method and an installation device for a cable joint in a photovoltaic power generation area, and relates to the technical field of cable connection. According to the installation method, the to-be-connected end of the to-be-connected cable is straightened and sawed, and the protective layers are stripped layer by layer, so that the stripped length of each protective layer is increased step by step from inside to outside, the cable core can be accurately exposed, and the subsequent construction requirements are met; the to-be-connected ends of the wire cores are in straight butt joint, the distance is controlled to be not larger than 2 mm, then the to-be-connected cables are fixed through the installation device, the problem that cable joints are not prone to alignment is solved, the wire core joints do not abut against the inner wall of the hot melting mold, and stress is reduced; a welding flux and a heat release welding flux are filled between the inner wall of the hot melting mold and the wire core for hot melting welding, and a refrigerating device is matched for cooling, so that the welding process is more stable; welding slag is cut after welding, and a joint is polished to ensure that the joint is flat; after the surface of the cable is cleaned, the protection layer is recovered, and the filling box is installed for sealing the sealant, thereby improving the sealing performance of the joint. The method has the effect of reducing the occurrence probability of defects such as slag inclusion at the welding position.

Description

Technical Field

[0001] This application relates to the field of cable connection technology, and in particular to an installation method and installation device for cable joints in photovoltaic power generation areas. Background Technology

[0002] As a key component in power transmission, the installation quality of cable joints is of paramount importance. In locations such as photovoltaic power generation areas, it is often necessary to connect multi-core cables, such as cross-linked polyethylene insulated power cables, with intermediate joints required. Hot-melt welding is one of the important processes for completing such connections.

[0003] Existing hot-melt welding processes for cable joints typically require placing a specialized mold over the cable end and relying on frictional force applied to the cable through the mold's inner wall and filler material to achieve and maintain alignment and contact between the two cable conductors. This method of connection results in significant interaction forces between the mold and the cable, causing the cable to be under stress constraint within the mold. This stress affects the ideal alignment of the cable cores and interferes with the natural flow and sequential solidification of molten metal within the mold cavity during welding, easily leading to defects such as porosity, slag inclusions, or incomplete fusion at the weld joint. This problem is particularly pronounced for complex multi-core cables, severely restricting the uniformity of the joint's conductivity and its long-term operational reliability.

[0004] In view of this, there is a need to provide an installation method and installation device for cable joints in photovoltaic power generation areas. Summary of the Invention

[0005] To address the problem that existing cable joint processes suffer from high stress between the mold and the cable during hot-melt cable welding, leading to defects such as porosity, slag inclusion, or incomplete fusion at the weld joint, this application provides an installation method and device for cable joints in photovoltaic power generation areas.

[0006] Firstly, this application provides an installation method for cable joints in photovoltaic power generation areas, which adopts the following technical solution: S1. First, straighten and use a cutting device to saw the ends of the two cables to be connected evenly. Then, peel off the protective layer of the cable to be connected layer by layer from the end to the inside to expose a section of the wire core. If there are multiple layers of the protective layer outside the wire core, the length of each layer of the protective layer being peeled off increases stepwise from the inside to the outside. S2. First, straighten and connect the two ends of the wire cores to be connected, and make the distance between them no more than 2mm. Then, use the photovoltaic power generation area cable connector installation device to fix the two cables to be connected. Then, install the hot melt mold at the joint of the two wire cores and ensure that the joint of each wire core does not abut against the inner wall of the hot melt mold. Finally, fill the space between the inner wall of the hot melt mold and the wire core with solder and exothermic flux. S3. Ignite the exothermic flux. After the exothermic flux has burned completely, use a cooling device to reduce the temperature of the hot melt mold. After the hot melt mold has cooled down, remove it. Then, use a cutting tool to cut off the welding slag at the joint, and then use a grinding tool to grind the joint. S4. First, clean the surface of the cable, then restore the joint and the protective layer removed in step S1, and finally install the filling box at the joint and fill the filling box with sealant.

[0007] By adopting the above technical solution, the installation method first straightens and cuts the ends of the cable to be connected, and then peels off the protective layer layer by layer, so that the length of each protective layer peeled off increases stepwise from the inside to the outside, which can accurately expose the wire core and meet the requirements of subsequent construction. The ends of the wire cores to be connected are straightened and the spacing is controlled to be no more than 2mm. Then, the cable to be connected is fixed with the installation device, which avoids the problem of cable joints being difficult to align and ensures that the wire core joint does not come into contact with the inner wall of the hot melt mold, reducing the stress between the mold and the cable. Solder and exothermic flux are filled between the inner wall of the hot melt mold and the wire core for hot melt welding. With the help of a cooling device to cool down, the welding process is more stable. After welding, the weld slag is cut off and the joint is ground to ensure that the joint is flat. After cleaning the cable surface, the protective layer is restored and the filling box is installed to fill and seal the joint, which improves the sealing performance of the joint. Compared with existing technologies, existing heat-shrinkable cable joints suffer from uneven heating and shrinkage, resulting in short service life. Mechanically crimped cold-shrinkable joints have problems such as uneven crimping force, easy rubber aging, and insufficient sealing. This method can effectively avoid these problems. Existing hot-melt connection construction has problems such as difficulty in aligning cable joints, stress affecting the fusion quality after clamping the mold, difficulty in controlling the shape of the fusion point, and cumbersome installation process of the external protective layer. This method ensures stress-free alignment of cable joints through the above steps, reduces the frequency of defects such as slag inclusion, incomplete fusion, porosity, bulge, and necking at the fusion point, improves the fusion quality, reduces the amount of grinding work for workers, and can quickly complete the installation of the cable's external protective layer, improving construction speed and sealing and waterproofing quality.

[0008] The second aspect of this application provides an installation device for cable joints in a photovoltaic power generation area, which adopts the following technical solution: it includes a base, a driving component, a hot melt mold, a stripping component, and two cable fixing components. The two cable fixing components are spaced apart on the base, and a fixed channel is formed on the cable fixing component to fix the cable to be connected that passes through the fixed channel. The driving component is connected to the stripping assembly and can drive the stripping assembly to move along the length direction of the base. The stripping assembly is located between the two cable fixing assemblies and can cut open the protective layer of the cable to be connected when passing the cable to be connected. The hot melt mold is placed on the base and includes two assembly blocks. Each assembly block has a mold groove, and each mold groove has two through slots on its wall. The two assembly blocks can be assembled to form a molding cavity by assembling the two mold grooves. The four through slots are assembled in pairs to form clearance holes. The clearance holes and the fixing channels correspond one-to-one with the cables to be connected. The ends of the two cables to be connected are attached to each other in the molding cavity. The other ends of the two cables to be connected move away from each other along the length of the base and pass through the corresponding fixing channels and clearance holes in sequence. A filler gap is formed between the inner wall of the molding cavity and the ends of the cables to be connected.

[0009] By adopting the above technical solution, the cable fixing assembly can firmly fix the cable to be connected, the driving component can drive the stripping assembly to accurately cut open the cable protective layer, and the forming cavity of the hot melt mold and the cable end to be connected form a filler gap, avoiding the cable from contacting the inner wall of the mold. Thus, during the hot melt welding process, the cable will not be subjected to external force applied by the inner wall of the mold, and therefore no stress will be generated, ensuring the ideal alignment of the cable core. This allows the molten metal to flow naturally and solidify sequentially within the mold cavity during welding, reducing the probability of defects such as porosity, slag inclusions, or incomplete fusion at the weld joint, and improving the uniformity of the cable joint's conductivity and long-term operational reliability. At the same time, this installation device is compatible with the installation method, improving the overall quality and efficiency of cable joint installation, and can also achieve effective sealing and protection of the cable joint through the filling box.

[0010] Specifically, the cable fixing assembly includes a fixing block, a fixing post, a moving block, and a driving bolt. The base has two radial grooves along its width direction, and the radial grooves correspond one-to-one with the cable fixing assembly. The fixing block and the fixing post are spaced apart on the base, and each radial groove is located between the corresponding fixing block and the fixing post. The moving block is inserted into the radial groove and can slide along the radial groove, and the fixing block and the moving block form the fixing channel. The fixing post has a driving screw hole along the width direction of the base on its post body. The screw end of the driving bolt passes through the driving screw hole and is rotatably connected to the moving block, and the driving bolt is screwed to the driving screw hole.

[0011] By adopting the above technical solution, the drive bolt is screwed into the drive screw hole. Rotating the drive bolt allows the moving block to slide in the radial groove, thereby changing the size of the fixing channel between the fixed block and the moving block. This can conveniently and stably fix cables of different specifications to be connected, ensuring the stability of the cables to be connected during the installation process and facilitating the smooth installation of subsequent cable joints.

[0012] Specifically, the peeling assembly includes a shaft shifting seat, a shaft cutting cylinder, a shaft cutting component, a drive unit, and two assembled components. The base has an axial groove along its own length direction. The bottom end of the shaft shifting seat has a shaft shifting block. The shaft shifting block is inserted into the axial groove and can slide along the axial groove. The drive unit includes a lead screw and a drive motor. The lead screw is rotatably connected to the groove wall of the axial groove along its length direction. The shaft shifting block has a threaded hole adapted to the lead screw, and the shaft shifting block is screwed to the lead screw through the threaded hole. The drive motor is drivenly connected to the lead screw and can drive the lead screw to rotate. The two splicing components are arranged opposite each other with the fixed channel as the center, and the two splicing components can be joined together to form a peeling hole. The driving unit is connected to the two splicing components and can drive the two splicing components to move closer or further away from each other. The axial cutting cylinder is provided on one of the two splicing components. The axial cutting component is provided in the peeling hole, and one side of the axial cutting component is formed with a cutting edge for cutting the protective layer of the cable to be connected. The piston rod of the axial cutting cylinder is connected to the other side of the axial cutting component and can drive the axial cutting component to move closer or further away from the center of the peeling hole.

[0013] By adopting the above technical solution, the lead screw and drive motor work together to drive the shaft shifter to slide along the axial groove, thus moving the stripping assembly. Two splicing parts can be joined to form a stripping hole. The drive unit can control the splicing parts to move closer or further apart, facilitating the operation of the cable to be connected. The axial cutting cylinder can drive the axial cutting component closer or further away from the center of the stripping hole, using the cutting edge of the axial cutting component to cut open the protective layer of the cable to be connected, achieving automated stripping, improving stripping efficiency and accuracy, and reducing the difficulty and error of manual operation.

[0014] Furthermore, the drive unit includes a peeling cylinder, a fixed hinge shaft, two connecting rods, and two scissor rods. The peeling cylinder and the fixed hinge shaft are spaced apart on the shaft shifter. The connecting rods and the splicing components correspond one-to-one with the scissor rods. One end of each of the two connecting rods is hinged to the piston rod of the peeling cylinder. The other end of each connecting rod is hinged to one end of the corresponding scissor rod. The other end of each scissor rod is connected to the corresponding splicing component. The middle part of each scissor rod is hinged to the fixed hinge shaft. The peeling cylinder can drive its piston rod to move closer to or away from the fixed hinge shaft. When the piston rod moves away from the fixed hinge shaft, the two splicing components can be spliced ​​together.

[0015] By adopting the above technical solution, when the peeling cylinder drives the piston rod to approach or move away from the fixed hinge shaft, the hinge structure of the connecting rod and the scissor rod enables the two splicing parts to accurately approach or move away from each other, realizing the splicing or separation action. This ensures that a peeling hole is formed during splicing, which facilitates the treatment of the protective layer of the cable to be connected, and improves the operational efficiency and accuracy of cable protective layer treatment.

[0016] Furthermore, the peeling assembly also includes a ring-cutting unit and a controller. The ring-cutting unit includes a ring-cutting seat, a ring-cutting motor, a drive gear, a ring-cutting cylinder, and a ring-cutting component. Both of the two assembled components have arc-shaped through grooves around the center of the peeling hole on the side away from the hot melt mold. When the two assembled components are assembled, the two arc-shaped through grooves can be joined together to form an annular groove. The outer wall of the annular groove is provided with internal teeth. The drive gear is rotatably connected to the ring-cutting seat and meshes with the internal teeth. The ring-cutting seat is inserted into the annular groove and abuts against the inner wall of the annular groove. The ring-cutting motor is driven by the drive gear and can drive the drive gear to rotate. The ring-cutting cylinder is provided on the ring-cutting seat. The piston rod of the ring-cutting cylinder is connected to the ring-cutting component and can drive the ring-cutting component to approach or move away from the center of the peeling hole. A cutting edge is formed on the end of the ring-cutting component near the center of the peeling hole. The ring-cutting motor, the ring-cutting cylinder, the peeling cylinder, the shaft-cutting cylinder, and the drive motor are all electrically connected to the controller. When the cable to be connected is clamped in the fixed channel and the end of the cable to be connected passes through the peeling hole, the controller can first control the ring-cutting cylinder to drive the ring-cutting component to approach and break the outermost protective layer on the cable to be connected, then control the ring-cutting motor to drive the ring-cutting seat to move the ring-cutting component around the cable to be connected once, and finally control the shaft-cutting cylinder to drive the shaft-cutting component to approach and break the outermost protective layer on the cable to be connected, and then control the drive motor to rotate the lead screw to drive the shaft-moving seat to approach the end of the cable to be connected.

[0017] By adopting the above technical solution, when the cable to be connected is clamped in a fixed channel and its end to be connected passes through the stripping hole, the controller can control the circumferential cutting cylinder to drive the circumferential cutting component to approach and break the outermost protective layer of the cable to be connected. Then, the controller controls the circumferential cutting motor to drive the circumferential cutting seat to move the circumferential cutting component around the cable to be connected, thereby achieving circumferential cutting of the cable's protective layer. After that, the controller controls the axial cutting cylinder to drive the axial cutting component to approach and break the outermost protective layer of the cable. Finally, the controller controls the drive motor to rotate the lead screw to drive the axial cutting seat to approach the end to be connected of the cable to be connected, thereby achieving axial cutting of the cable's protective layer. This combination of circumferential cutting and axial cutting can accurately and efficiently strip the cable's protective layer, improving the efficiency and quality of protective layer stripping in cable joint installation, and facilitating the smooth progress of subsequent cable splicing and hot-melt welding processes.

[0018] Furthermore, the peeling assembly also includes a radial shift plate, a radial shift cylinder, two shaft cutting parts, and two shaft cutting cylinders. A radial shift groove is formed on the shaft shift seat along the width direction of the base, and a mounting post is provided on the shaft shift seat at the end of the radial shift groove away from the fixed channel. The bottom end of the radial shift plate is inserted into the radial shift groove and can move closer to or away from the mounting post along the radial shift groove. The radial shift cylinder, the peeling cylinder, and the fixed hinge shaft are all provided on the plate surface of the radial shift plate. The piston rod of the radial shift cylinder is connected to the mounting post and can drive the radial shift plate to move along the radial shift groove. The assembly component and the axial cutting component are each corresponding to the axial cutting cylinder. The cylinder body of each axial cutting cylinder is located on the corresponding assembly component, and each axial cutting component is located on the piston rod of the corresponding axial cutting cylinder. The ends of each axial cutting component near the center of the peeling hole can be assembled together to form a cutting edge extending along the length direction of the base. The controller is electrically connected to the radial displacement cylinder. When the axial cutting component moves to the end of the cable to be connected, the controller can simultaneously control the piston rods of the peeling cylinder and the radial displacement cylinder to retract into the cylinder body, so that the two axial cutting components move away from each other while approaching the mounting post and peeling off the cut protective layer from the cable to be connected.

[0019] By adopting the above technical solution, the radial shift plate can move within the radial shift groove, and the radial shift cylinder can drive the radial shift plate closer to or away from the mounting post, allowing for flexible adjustment of the position of the axial cutting component. The axial cutting component corresponds to the axial cutting cylinder, and the ends of each axial cutting component near the center of the stripping hole can be joined together to form a cutting edge extending along the length of the base, facilitating the cutting of the cable protective layer. When the axial cutting component moves to the end of the cable to be connected, the controller can simultaneously control the piston rods of the stripping cylinder and the radial shift cylinder to retract into the cylinder body, causing the two axial cutting components to move away from each other while approaching the mounting post, thus smoothly peeling off the cut protective layer from the cable to be connected. This achieves efficient stripping of the cable protective layer and improves the construction efficiency of the cable joint installation method.

[0020] Furthermore, each of the axial cutting cylinders has a mounting block on its piston rod, and each mounting block has a deformation groove. A deformation shaft is provided on the groove wall along the length of the base. Each axial cutting component has a cutting surface and a fixing surface on the side away from its cutting edge. Each axial cutting component is hinged to the corresponding deformation shaft. A chamfer is formed around the deformation shaft at the junction of the cutting surface and the fixing surface. When two axial cutting components are joined, a buffer is provided on the side where the two axial cutting components meet. When the axial cutting parts are far apart, each of the cutting surfaces abuts against the side wall of the deformation groove away from its own opening, and restricts the cutting edge of the axial cutting part from turning around the deformation axis to the center of the peeling hole. When the fixed surface abuts against the side wall of the deformation groove away from its own opening, the buffer is oriented towards the center of the peeling hole, and the controller can control the axial cutting cylinder to drive the axial cutting part to move the buffer closer to the center of the peeling hole, and abut the cable to be connected between the buffer and the hole wall of the peeling hole.

[0021] By adopting the above technical solution, the axial cutting component is hinged on the deformable shaft, and the intersection of the cutting surface and the fixed surface forms a chamfer around the deformable shaft. When the two axial cutting components move away from each other, the cutting surface abuts against the groove wall on the side away from its own groove opening on the deformable groove. This can limit the cutting edge of the axial cutting component from turning around the deformable shaft to the center of the peeling hole, preventing the protective layer cut by the axial cutting component from slipping off the axial cutting component when it is peeled off from the cable to be connected by the two axial cutting components moving away from each other. When the fixed surface abuts against the groove wall on the side away from its own groove opening on the deformable groove, the buffer component faces the center of the peeling hole. The controller can control the axial cutting cylinder to drive the axial cutting component to move the buffer component closer to the center of the peeling hole, and abut the cable to be connected between the buffer component and the hole wall of the peeling hole, ensuring the stable fixation of the cable.

[0022] Furthermore, each of the assembled blocks is provided with a limiting groove, the peeling assembly includes two shaft shift seats, the internal threads of the two threaded holes are in opposite directions, and the lead screw is symmetrically provided with two threaded segments in opposite directions along its own length direction. Each threaded hole is screwed to the corresponding threaded segment, so that the drive motor can drive the two shaft shift seats to move closer or further apart by driving the lead screw to rotate. Each of the shaft shift seats is provided with a limiting block on the side near the hot melt mold. The limiting block corresponds to the limiting groove one by one. When two of the assembled blocks are assembled together, the drive motor can control the two shaft shift seats to move closer to each other and insert each of the limiting blocks into the corresponding limiting groove, so as to restrict the two assembled blocks from moving away from each other.

[0023] By adopting the above technical solution, the screw with oppositely oriented threaded sections and internally oriented threaded holes cooperate to drive the screw to rotate, which can move the two shaft shifters closer or further apart, thus achieving effective control over the direction of movement of the shaft shifters. When the two assemblies are assembled, the limiting block on the shaft shifter can be inserted into the limiting groove of the assemblies, limiting the two assemblies from moving away from each other, improving the stability and reliability of the hot melt mold during use, and ensuring the welding quality of the cable joint.

[0024] Specifically, it also includes the filling box, which includes a receiving component, a filling component, two sealing sleeves, and two hole caps. The receiving component and the filling component are detachably connected, and the receiving component and the filling component can be assembled to form a filling sleeve suitable for being fitted onto the cable to be connected. The two sealing sleeves correspond one-to-one with the two ends of the filling sleeve. Each sealing sleeve can be fitted onto the cable to be connected and seal the gap between the corresponding end of the filling sleeve and the cable to be connected. The filling component has two through holes for filling glue or venting. The hole caps correspond one-to-one with the through holes of the filling component. Each hole cap can seal the corresponding through hole of the filling component.

[0025] By adopting the above technical solution, the receiving component and the filling component can be detachably connected and assembled to form a filling sleeve, which is convenient for installation and disassembly and can be sleeved on the cable to be connected; the sealing sleeve can seal the gap between the two ends of the filling sleeve and the cable, preventing sealant leakage and improving the sealing effect; the through hole on the filling component can be used for filling or venting, ensuring that the filling process is smooth and that the sealant is filled evenly; the hole cover can seal the through hole, preventing sealant from overflowing and external impurities from entering, further enhancing the sealing performance, thereby improving the waterproof shielding performance of the cable joint and extending the service life of the cable.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By using an installation device to fix the cable to be connected, the cable is prevented from being under stress constraint in the mold, ensuring the centering position of the wire core, allowing the molten metal to flow naturally and solidify sequentially, reducing the frequency of defects such as porosity, slag inclusion, or lack of fusion at the weld joint, and improving the uniformity of the joint's conductivity and the reliability of long-term operation. 2. After clamping the cable to be connected in the fixed channel and passing the end of the cable to be connected through the stripping hole, the controller can control the circumferential cutting cylinder to drive the circumferential cutting component to approach and break the outermost protective layer of the cable to be connected. Then, the controller controls the circumferential cutting motor to drive the circumferential cutting seat to move the circumferential cutting component around the cable to be connected, thereby achieving circumferential cutting of the cable protective layer. After that, the controller controls the axial cutting cylinder to drive the axial cutting component to approach and break the outermost protective layer of the cable. Finally, the controller controls the drive motor to rotate the lead screw to drive the axial cutting seat to approach the end of the cable to be connected, thereby achieving axial cutting of the cable protective layer. This combination of circumferential cutting and axial cutting can accurately and efficiently strip the cable protective layer, improve the efficiency and quality of protective layer stripping in the cable joint installation method, and facilitate the smooth progress of subsequent cable splicing and hot melt welding processes. Attached Figure Description

[0027] Figure 1 This is a perspective view of an installation device for a cable joint in a photovoltaic power generation area according to this application; Figure 2 yes Figure 1 A schematic enlarged view of region A, showing the peeling assembly; Figure 3 It is along Figure 1 A schematic cross-sectional view of the central axis of a hot melt mold; Figure 4 yes Figure 3 A schematic enlarged view of region B, showing the ring-cut element; Figure 5 It is along Figure 3 A schematic cross-sectional view taken along the CC direction; Figure 6 yes Figure 5 A schematic enlarged view of region D, showing the axially cut component; Figure 7 This is a perspective view of the filling box of this application.

[0028] Reference numerals: 1. Base; 2. Drive component; 21. Lead screw; 22. Drive motor; 3. Hot melt mold; 31. Assembly block; 32. Forming cavity; 4. Peeling assembly; 41. Shaft shifter; 411. Mounting column; 412. Limiting block; 42. Shaft cutting cylinder; 421. Mounting block; 422. Electromagnet; 43. Shaft cutting component; 431. Cutting surface; 432. Fixing surface; 433. Buffer component; 434. Magnetic component; 44. Drive unit; 441. Peeling cylinder; 442. Fixed hinge shaft; 443. Connecting rod; 444 45. Scissor lifter; 451. Assembly piece; 452. Internal gear; 453. Arc roller; 46. Ring cutting unit; 47. Ring cutting seat; 48. Ring cutting motor; 49. Drive gear; 40. Ring cutting cylinder; 41. Ring cutting component; 42. Radial shift plate; 43. Radial shift cylinder; 54. Cable fixing assembly; 55. Fixing block; 56. Fixing post; 57. Moving block; 58. Drive bolt; 69. Cable; 60. Core wire; 61. Protective layer; 72. Filling box; 73. Receiving component; 74. Filling component; 75. Sealing sleeve; 76. Hole cover. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-7 Further explanation: See Figure 1 and Figure 7 An installation method for a cable joint in a photovoltaic power generation area, comprising: The technical effect of the installation method for a photovoltaic power generation area cable joint in this application is as follows: S1. First, straighten and use a cutting device to cut the ends of the two cables to be connected 6 evenly. Then, peel off the protective layer 62 of the cable to be connected 6 layer by layer from the end to the inside to expose a section of wire core 61. If the wire core 61 is provided with multiple protective layers 62, the length of each protective layer 62 peeled off increases stepwise from the inside to the outside. S2. First, straighten and connect the ends of the two wire cores 61 to be connected, and make the gap between them no more than 2mm. Then, use the photovoltaic power generation area cable connector installation device to fix the two cables 6 to be connected. Then, install the hot melt mold 3 at the joint of the two wire cores 61 and ensure that the joint of each wire core 61 does not abut against the inner wall of the hot melt mold 3. Finally, fill the space between the inner wall of the hot melt mold 3 and the wire cores 61 with solder and exothermic flux. S3. Ignite the exothermic flux. After the exothermic flux has burned completely, use a cooling device to reduce the temperature of the hot melt mold 3. After the hot melt mold 3 has cooled down, remove it. Then, first use a cutting tool to cut off the welding slag at the joint, and then use a grinding tool to grind the joint. S4. First, clean the surface of the cable 6, then restore the joint and the protective layer 62 that was removed in step S1, and finally install the filling box 7 at the joint and fill the filling box 7 with sealant.

[0030] Compared with existing technologies, this installation method effectively avoids the problems of uneven heating and shrinkage of existing heat-shrinkable cable joints, which result in short service life, and uneven crimping force, easy aging of rubber, and insufficient sealing of mechanically crimped cold-shrinkable joints. Existing hot-melt connection construction has problems such as difficulty in aligning cable joints, stress affecting the fusion quality after clamping the mold, difficulty in controlling the shape of the fusion point, and cumbersome installation process of the outer protective layer 62. This method ensures stress-free alignment of cable joints through the above steps, reduces the frequency of defects such as slag inclusion, incomplete fusion, pores, bulges, and necking at the fusion point, improves the fusion quality, reduces the amount of grinding work for workers, and can quickly complete the installation of the outer protective layer 62 of the cable 6, improving construction speed and sealing and waterproofing quality.

[0031] Specifically, taking a cross-linked polyethylene insulated power cable 6 as an example, the cable 6 consists of a PVC outer protective layer, armor, inner liner, and three cores 61 from the outside in. Each core 61, in addition to the innermost copper core, is wrapped with a semiconductor layer, an insulation layer, and a metal shielding layer from the inside out. When peeling off the protective layer 62 in step S1, the cable 6 can be stripped by extending 800mm inward from the end to be joined using a cable stripper. After stripping, the armor of the cable 6 is then stripped. The armor is cut off 30mm from the protective sheath cut-off position (i.e., 30mm of armor is left), and the inner liner cut-off position is 30mm from the armor cut-off position. m; After the inner lining layer is stripped, the protective layer 62 of each single wire core 61 is stripped. First, the metal shielding layer is cut off and stripped at a distance of 400mm from the outer protective sheath. Then, the polyethylene insulation layer is cut off and stripped at a distance of 200mm from the outer protective sheath. Finally, the semiconductor layer is cut off and stripped at a distance of 100mm from the outer protective sheath, and a 5mm×45° bevel is made. This completes the stripping of the cable protective layer 62. Before the wire core 61 fusion welding begins in step S2, heat shrink tubing can be inserted on both sides of the wire core 61. The heat shrink tubing needs to completely cover the semiconductor layer to prevent damage to the semiconductor layer during heat fusion welding. It is removed after the heat fusion welding is completed. During hot melt welding, special flux can be evenly applied to the contact surface of the wire core 61 to remove the oxide film. Sufficient copper-based solder is then filled into the molten material cavity of the hot melt mold 3. Exothermic flux is sprinkled into the hopper and ignition point. This exothermic flux can be thermite. The lid of the hot melt mold 3 is then closed. Next, a safety cover is placed on the lid of the hot melt mold 3. Then, the igniter is ignited with a blowtorch for hot melt welding. After the solder is fully burned, the mold lid is opened to observe the combustion status of the fuel. The welded area is then cooled with a cold air gun. After cooling, the hot melt mold 3 is removed. After the hot melt welding is completed, the cable joint is ground. First, the upper welding slag is removed with a cutting machine. Then, the joint is ground with a grinder, and the heat shrink tubing on both sides of the wire core 61 joint is cut off. After cleaning the surface of the conductor core 61 joint in step S4, semi-conductive vulcanized tape can be wrapped around the surface of the welded conductor in a semi-lapped manner. After wrapping, insulating vulcanized tape is wrapped around the top, 3-4mm higher than the insulation surface of cable 6. Then, cold shrink tubing is inserted into the cable joint, allowing the cold shrink tubing to shrink to the surface of the insulation layer. Tin foil is wrapped around the surface of the cold shrink tubing, and heating tape is installed for heating. The heating time is set according to the required heating thermometer. After the insulation layer is restored, the heating tape and cold shrink tubing are removed. Semi-conductive paint is evenly applied, and semi-conductive tape is wrapped around in a semi-lapped manner. The metal shielding is restored and fixed with springs. The three phases are joined together and fixed with PVC tape in a semi-lapped manner. Armor tape is wrapped around in a semi-lapped manner, thus completing the installation of protective layer 62.

[0032] See Figure 1 and Figure 2 Based on the above-mentioned installation method for cable joints in photovoltaic power generation areas, the second aspect of this application also provides an installation device for cable joints in photovoltaic power generation areas. This device is used to implement the above-mentioned installation method for cable joints in photovoltaic power generation areas. Specifically, the device includes: a base 1, a driving component 2, a hot-melt mold 3, a stripping assembly 4, and two cable fixing assemblies 5. The two cable fixing assemblies 5 are spaced apart on the base 1. Each cable fixing assembly 5 includes a fixing block 51, a fixing post 52, a moving block 53, and a driving bolt 54. The base 1 has two radial grooves along its width direction, and the radial grooves correspond one-to-one with the cable fixing assemblies 5. The fixing block 51... The fixed blocks 51 and fixed posts 52 are spaced apart on the base 1. Each radial groove is located between the corresponding fixed block 51 and fixed post 52. The movable block 53 is inserted into the radial groove and can slide along the radial groove. The fixed block 51 and the movable block 53 form a fixed channel for fixing the connecting cable 6. The fixed post 52 has a drive screw hole along the width direction of the base 1. The screw end of the drive bolt 54 passes through the drive screw hole and is rotatably connected to the movable block 53. The drive bolt 54 is screwed to the drive screw hole. The drive bolt 54 can be a T-bolt with an insertable lever arm to facilitate manual tightening of the drive bolt 54 by the user.

[0033] See Figure 3 and Figure 4The peeling assembly 4 includes a controller (not shown in the figure), a drive unit 44, four assembly parts 45, two shaft shift seats 41, four shaft cutting parts 43, four shaft cutting cylinders 42, two ring cutting units 46, two radial shift plates 47, and two radial shift cylinders 48. An axial groove is formed on the base 1 along its length. Each shaft shift seat 41 has a shaft shift block at its bottom end, and each shaft shift block is inserted into the axial groove and can slide along the axial groove. The drive unit 2 includes a lead screw 21 and a drive motor 22. The lead screw 21 is rotatably connected to the groove wall along the length of the axial groove. The lead screw 21 has two symmetrically arranged threaded sections with opposite directions of rotation along its length. The shaft shift blocks have threaded holes adapted to the lead screw 21. The internal threads of the two threaded holes have opposite directions of rotation, and each threaded hole is screwed to the corresponding threaded section, so that the drive motor 22 can rotate via the drive lead screw 21 to drive the two shafts. The shift seats 41 move closer to or further away from each other; the four splicing parts 45 are arranged in pairs, and each pair of splicing parts 45 corresponds to one shaft shift seat 41, two shaft cutting parts 43, two shaft cutting cylinders 42, one ring cutting unit 46, one radial shift plate 47 and one radial shift cylinder 48. The two splicing parts 45 in each pair are two arc-shaped parts arranged opposite each other with the fixed channel as the center, and the two splicing parts 45 in each pair can be spliced ​​together to form a peeling hole. The shaft shift seat 41 is provided with a radial shift groove along the width direction of the base 1, and a mounting post 411 is provided on the shaft shift seat 41 at the end of the radial shift groove away from the fixed channel. The bottom end of the radial shift plate 47 is inserted into the radial shift groove and can move closer to or further away from the mounting post 411 along the radial shift groove. The radial shift cylinder 48 and the drive unit 44 are both provided on the plate surface of the radial shift plate 47. The piston rod of the radial shift cylinder 48 is connected to the mounting post 411 and can drive the radial shift plate 47 to move along the radial shift groove.

[0034] See Figure 2 and Figure 5 The drive unit 44 includes a shell-peeling cylinder 441, a fixed hinge shaft 442, two connecting rods 443, and two scissor rods 444. The shell-peeling cylinder 441 and the fixed hinge shaft 442 are spaced apart on the shaft shifter 41. The connecting rods 443 and the assembly parts 45 correspond one-to-one with the scissor rods 444. One end of each connecting rod 443 is hinged to the piston rod of the shell-peeling cylinder 441, and the other end of each connecting rod 443 is hinged to one end of the corresponding scissor rod 444. The other end of each scissor rod 444 is connected to the corresponding assembly part 45. The middle part is hinged to the fixed hinge shaft 442. The peeling cylinder 441 can drive its piston rod to approach or move away from the fixed hinge shaft 442. When the piston rod moves away from the fixed hinge shaft 442, the two splicing parts 45 can be spliced ​​together. The splicing parts 45 and the shaft cutting parts 43 are all in one-to-one correspondence with the shaft cutting cylinders 42. The cylinder body of each shaft cutting cylinder 42 is set on the corresponding splicing part 45, and each shaft cutting part 43 is set on the piston rod of the corresponding shaft cutting cylinder 42. The end of each shaft cutting part 43 near the center of the peeling hole can be spliced ​​together to form a cutting edge extending along the length direction of the base 1.

[0035] See Figure 4 and Figure 6 Each axial cutting cylinder 42 has a mounting block 421 on its piston rod, and each mounting block 421 has a deformation groove. A deformation shaft is provided on the groove wall along the length of the base 1. Each axial cutting component 43 has a cutting surface 431 and a fixing surface 432 on the side away from its own cutting edge. Each axial cutting component 43 is hinged to the corresponding deformation shaft. A chamfer is formed at the junction of the cutting surface 431 and the fixing surface 432 around the deformation shaft. When two axial cutting components 43 are joined together, a buffer is provided on the side of the two axial cutting components 43 that are in contact. 433, when the two axial cutting parts 43 are far apart from each other, each cutting surface 431 abuts against the side wall of the deformation groove away from its own groove opening, and restricts the cutting edge of the axial cutting part 43 to turn around the deformation axis to the center of the peeling hole. When the fixed surface 432 abuts against the side wall of the deformation groove away from its own groove opening, the buffer 433 faces the center of the peeling hole, and the controller can control the axial cutting cylinder 42 to drive the axial cutting part 43 to move the buffer 433 closer to the center of the peeling hole, and abut the cable 6 to be connected between the buffer 433 and the hole wall of the peeling hole.

[0036] Specifically, an arc-shaped roller can be rotatably connected to the inner wall of each of the two splicing parts 45 via bearing seats. An arc-shaped recess is formed on the side of the arc-shaped roller facing the center of the peeling hole. The buffer 433 can be a rubber part, so that the controller can control the axial cutting cylinder 42 to drive the axial cutting part 43 to move the buffer 433 closer to the center of the peeling hole, and abut the wire core 61 of the cable to be connected 6 between the buffer 433 and the two arc-shaped rollers. The abutment position can be the junction of the wire core 61 and the semiconductor layer. Magnetic suction elements can also be provided on both the cutting surface 431 and the fixing surface 432, and corresponding electromagnets 422 can be embedded in the groove wall on the side away from its own groove opening on the deformation groove. Each electromagnet 422 is electrically connected to the controller, so that the controller can adjust the flipping state of the axial cutting part 43 by attracting the magnetic suction elements on the cutting surface 431 or the fixing surface 432 through the electromagnets 422.

[0037] See Figure 3 and Figure 4The ring-cutting unit 46 includes a ring-cutting seat 461, a ring-cutting motor 462, a drive gear 463, a ring-cutting cylinder 464, and a ring-cutting component 465. Both of the two assembled components 45 have arc-shaped through grooves around the center of the peeling hole on the side away from the hot-melt mold 3. When the two assembled components 45 are assembled, the two arc-shaped through grooves can be joined together to form an annular groove. The outer wall of the annular groove is provided with internal teeth 451. The drive gear 463 is rotatably connected to the ring-cutting seat 461 and meshes with the internal teeth 451. The ring-cutting seat 461 is inserted into the annular groove and meshes with the internal teeth 451. The inner wall of the annular groove abuts against the ring. The ring cutting motor 462 is connected to the drive gear 463 and can drive the drive gear 463 to rotate. The ring cutting cylinder 464 is located on the ring cutting seat 461. The piston rod of the ring cutting cylinder 464 is connected to the ring cutting member 465 and can drive the ring cutting member 465 to approach or move away from the center of the peeling hole. A cutting edge is formed at one end of the ring cutting member 465 near the center of the peeling hole. The ring cutting motor 462, the ring cutting cylinder 464, the peeling cylinder 441, the shaft cutting cylinder 42 and the drive motor 22 are all electrically connected to the controller.

[0038] The working process of the peeling component 4 described in this application is as follows: When the cable 6 to be connected is clamped in the fixed channel and its end to be connected passes through the stripping hole, the controller can control the ring-cutting cylinder 464 to drive the ring-cutting piece 465 to approach and break the outermost protective layer 62 of the cable 6 to be connected. Then, the controller controls the ring-cutting motor 462 to drive the ring-cutting seat 461 to drive the ring-cutting piece 465 to circle around the cable 6 to achieve a ring cut on the protective layer 62 of the cable 6. After that, the controller controls the axial-cutting cylinder 42 to drive the axial-cutting piece 43 to approach and break the outermost protective layer 62 of the cable 6. Finally, the controller controls the drive motor 22 to rotate the lead screw 21 to drive the axial-moving seat 41 to approach the end to be connected of the cable 6 to achieve an axial cut on the protective layer 62 of the cable 6. When the axial-cutting piece 43 moves to the end to be connected of the cable 6, the controller can simultaneously control the piston rods of the stripping cylinder 441 and the radial-moving cylinder 48 to retract into the cylinder body, so that the two axial-cutting pieces 43 move away from each other. While moving away from the mounting post 411, the cut protective layer 62 on the cable to be connected is successfully peeled off. When the two axial cutting pieces 43 move away from each other, the cutting surface 431 abuts against the groove wall on the side away from its own opening on the deformation groove. This restricts the cutting edge of the axial cutting piece 43 from turning around the deformation axis to the center of the peeling hole, preventing the protective layer 62 cut by the axial cutting piece 43 from slipping off the axial cutting piece 43 when it is peeled off from the cable to be connected by the two axial cutting pieces 43 moving away from each other. This combination of circumferential cutting and axial cutting can accurately and efficiently peel off the protective layer 62 of the cable 6, improving the efficiency and quality of the protective layer 62 peeling in the cable joint installation method, and facilitating the smooth progress of subsequent cable 6 splicing and hot melt welding processes.

[0039] See Figure 1 and Figure 3The hot melt mold 3 is placed on the base 1 and includes two assembly blocks 31. Each assembly block 31 has a mold groove, and each mold groove has two through slots on its wall. The two assembly blocks 31 can be assembled to form a molding cavity 32, and the four through slots can be assembled in pairs to form clearance holes. The clearance holes and fixing channels correspond one-to-one with the cables 6 to be connected. The ends of the two cables 6 to be connected are attached to each other in the molding cavity 32, and the other ends of the two cables 6 to be connected move away from each other along the length of the base 1 and pass through the corresponding fixing channels and clearance holes in sequence. A filling gap is formed between the inner wall of the molding cavity 32 and the ends of the cables 6 to be connected. Each assembly block 31 has a limit groove, and each shaft shifter 41 has a limit groove near the hot melt mold 3. Each side is equipped with a limiting block 412, which corresponds to a limiting groove. When the two splicing blocks 31 are spliced ​​together, the drive motor 22 can control the two shaft shift seats 41 to move closer to each other and insert each limiting block 412 into the corresponding limiting groove to limit the two splicing blocks 31 to move away from each other, thereby improving the stability and reliability of the hot melt mold 3 during use and ensuring the welding quality of the cable joint. When the two splicing blocks 31 are spliced ​​together, the controller can first control the electromagnet 422 to make each buffer 433 face the center of the peeling hole, and then control the shaft cutting cylinder 42 to drive the shaft cutting part 43 to move the buffer 433 closer to the center of the peeling hole, so that the cable 6 to be connected is abutted between the buffer 433 and the hole wall of the peeling hole, ensuring the stable fixation of the cable 6.

[0040] See Figure 7 The filling box 7 includes a receiving component 71, a filling component 72, two sealing sleeves 73, and two hole caps 74. The receiving component 71 and the filling component 72 are detachably connected by connecting lugs, bolts, and nuts. The receiving component 71 and the filling component 72 can be assembled to form a filling sleeve suitable for being fitted onto the cable 6 to be connected. The two sealing sleeves 73 correspond one-to-one with the two ends of the filling sleeve. Each sealing sleeve 73 can be fitted onto the cable 6 to be connected and seal the gap between the corresponding end of the filling sleeve and the cable 6 to be connected. The filling component 72 has two through holes for filling or venting. The hole caps 74 correspond one-to-one with the through holes of the filling component 72. The cap 74 can seal the through hole of the corresponding filling component 72, so that the receiving component 71 and the filling component 72 can be detachably connected and assembled to form a filling sleeve, which is convenient for installation and disassembly and can be sleeved on the cable 6 to be connected; the sealing sleeve 73 can seal the gap between the two ends of the filling sleeve and the cable 6 to prevent sealant leakage and improve the sealing effect; the through hole on the filling component 72 can be used for filling or venting, ensuring that the filling process is smooth and that the sealant is filled evenly; the cap 74 can seal the through hole to prevent sealant from overflowing and external impurities from entering, further enhancing the sealing performance, thereby improving the waterproof shielding performance of the cable joint and extending the service life of the cable 6.

[0041] The implementation principle of the installation device for cable joints in photovoltaic power generation areas described in this application is as follows: The cable fixing assembly 5 securely fixes the cable 6 to be connected, while the driving component 2 drives the stripping assembly 4 to precisely cut open the protective layer 62 of the cable 6. The forming cavity 32 of the hot melt mold 3 forms a filler gap with the end of the cable 6 to be connected, preventing the cable 6 from contacting the inner wall of the mold. Thus, during the hot melt welding process, the cable 6 is not subjected to external force applied by the inner wall of the mold, and therefore no stress is generated. This ensures the ideal alignment of the cable core 61, allowing the molten metal to flow naturally and solidify sequentially within the mold cavity during welding. This reduces the probability of defects such as porosity, slag inclusions, or incomplete fusion at the weld joint, improving the uniformity of conductivity and long-term operational reliability of the cable joint. Simultaneously, this installation device is compatible with the installation method, improving the overall quality and efficiency of cable joint installation, and also enabling effective sealing and protection of the cable joint through the filling box 7.

[0042] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An installation method for cable joints in photovoltaic power generation areas, characterized in that, include: S1. First, straighten and use a cutting device to saw the ends of the two cables (6) to be connected evenly. Then, peel off the protective layer (62) of the cable (6) to be connected layer by layer from the end to be connected to expose a section of wire core (61). If the wire core (61) is provided with multiple layers of the protective layer (62), the length of each layer of the protective layer (62) to be peeled off increases stepwise from the inside to the outside. S2. First, straighten the ends of the two wire cores (61) to be connected and make the distance between them no more than 2mm. Then, use the installation device for the photovoltaic power generation area cable connector to fix the two cables (6) to be connected. Then, install the hot melt mold (3) at the joint of the two wire cores (61) and ensure that the joint of each wire core (61) does not abut against the inner wall of the hot melt mold (3). Finally, fill the space between the inner wall of the hot melt mold (3) and the wire core (61) with solder and exothermic flux. S3. Ignite the exothermic flux. After the exothermic flux has burned completely, use a cooling device to reduce the temperature of the hot melt mold (3). After the hot melt mold (3) has cooled down, remove it. Then, use a cutting tool to cut off the welding slag at the joint, and then use a grinding tool to grind the joint. S4. First, clean the surface of the cable (6), then restore the joint and the protective layer (62) removed in step S1, and finally install the filling box (7) at the joint and fill the filling box (7) with sealant.

2. An installation device for cable joints in photovoltaic power generation areas, used in the installation method for cable joints in photovoltaic power generation areas as described in claim 1, characterized in that, include: The base (1), drive unit (2), hot melt mold (3), shell stripping assembly (4) and two cable fixing assemblies (5) are arranged at intervals on the base (1). The cable fixing assembly (5) has a fixed channel and can fix the cable to be connected (6) passing through the fixed channel. The driving component (2) is connected to the stripping assembly (4) and can drive the stripping assembly (4) to move along the length direction of the base (1). The stripping assembly (4) is located between the two cable fixing assemblies (5) and can cut open the protective layer (62) of the cable to be connected (6) when passing the cable to be connected (6). The hot melt mold (3) is placed on the base (1) and includes two splicing blocks (31). Each splicing block (31) has a mold groove. Each mold groove has two through grooves on its wall. The two splicing blocks (31) can be spliced ​​together to form a molding cavity (32). The four through grooves are spliced ​​together to form clearance holes. The clearance holes and the fixed channels correspond one-to-one with the cables to be connected (6). The ends of the two cables to be connected (6) are attached to the molding cavity (32). The other ends of the two cables to be connected (6) are separated from each other along the length of the base (1) and pass through the corresponding fixed channels and clearance holes in sequence. A filler gap is formed between the inner wall of the molding cavity (32) and the ends of the cables to be connected (6).

3. The installation device for a cable joint in a photovoltaic power generation area according to claim 2, characterized in that: The cable fixing assembly (5) includes a fixing block (51), a fixing post (52), a moving block (53), and a driving bolt (54). The base (1) has two radial grooves along its width direction, and the radial grooves correspond one-to-one with the cable fixing assembly (5). The fixing block (51) and the fixing post (52) are spaced apart on the base (1). Each radial groove is located between the corresponding fixing block (51) and the fixing post (52). The moving block (53) is inserted into the radial groove and can slide along the radial groove. The fixing block (51) and the moving block (53) form the fixing channel. The fixing post (52) has a driving screw hole along the width direction of the base (1). The screw end of the driving bolt (54) passes through the driving screw hole and is rotatably connected to the moving block (53). The driving bolt (54) is screwed to the driving screw hole.

4. The installation device for a cable joint in a photovoltaic power generation area according to claim 2, characterized in that: The peeling assembly (4) includes a shaft shifter (41), a shaft cutting cylinder (42), a shaft cutting component (43), a drive unit (44), and two splicing components (45). The base (1) has an axial groove along its own length direction. The bottom end of the shaft shifter (41) is provided with a shaft shifting block. The shaft shifting block is inserted into the axial groove and can slide along the axial groove. The drive component (2) includes a lead screw (21) and a drive motor (22). The lead screw (21) is rotatably connected to the groove wall of the axial groove along the length direction of the axial groove. The shaft shifting block has a threaded hole that matches the lead screw (21), and the shaft shifting block is screwed to the lead screw (21) through the threaded hole. The drive motor (22) is connected to the lead screw (21) and can drive the lead screw (21) to rotate. Two splicing components (45) are arranged opposite each other with the fixed channel as the center, and the two splicing components (45) can be spliced ​​together to form a peeling hole. The driving unit (44) is connected to the two splicing components (45) and can drive the two splicing components (45) to move closer or further away from each other. The axial cutting cylinder (42) is provided on one of the two splicing components (45). The axial cutting component (43) is provided in the peeling hole, and one side of the axial cutting component (43) is formed with a cutting edge for cutting the protective layer (62) of the cable to be connected (6). The piston rod of the axial cutting cylinder (42) is connected to the other side of the axial cutting component (43) and can drive the axial cutting component (43) to move closer or further away from the center of the peeling hole.

5. The installation device for a cable joint in a photovoltaic power generation area according to claim 4, characterized in that: The drive unit (44) includes a shell-peeling cylinder (441), a fixed hinge shaft (442), two connecting rods (443), and two scissor rods (444). The shell-peeling cylinder (441) and the fixed hinge shaft (442) are spaced apart on the shaft shifter (41). The connecting rods (443) and the assembly (45) correspond one-to-one with the scissor rods (444). One end of each of the two connecting rods (443) is hinged to the piston rod of the shell-peeling cylinder (441). The other end of the connecting rod (443) is hinged to one end of the corresponding scissor bar (444), and the other end of each scissor bar (444) is connected to the corresponding splicing piece (45). The middle part of each scissor bar (444) is hinged to the fixed hinge shaft (442). The peeling cylinder (441) can drive its piston rod to approach or move away from the fixed hinge shaft (442). When the piston rod moves away from the fixed hinge shaft (442), the two splicing pieces (45) can be spliced ​​together.

6. The installation device for a cable joint in a photovoltaic power generation area according to claim 5, characterized in that: The peeling assembly (4) further includes a ring-cutting unit (46) and a controller. The ring-cutting unit (46) includes a ring-cutting seat (461), a ring-cutting motor (462), a drive gear (463), a ring-cutting cylinder (464), and a ring-cutting component (465). Both of the two assembled components (45) have arc-shaped through grooves on the side away from the hot-melt mold (3) around the center of the peeling hole. When the two assembled components (45) are assembled, the two arc-shaped through grooves can be joined to form an annular groove. The outer wall of the annular groove is provided with internal teeth (451). The drive gear (463) is rotatably connected to the ring-cutting seat (461). The ring cutting seat (461) is inserted into the annular groove and abuts against the inner sidewall of the annular groove. The ring cutting motor (462) is connected to the drive gear (463) and can drive the drive gear (463) to rotate. The ring cutting cylinder (464) is provided on the ring cutting seat (461). The piston rod of the ring cutting cylinder (464) is connected to the ring cutting member (465) and can drive the ring cutting member (465) to approach or move away from the center of the peeling hole. A cutting edge is formed at one end of the ring cutting member (465) near the center of the peeling hole. The ring-cutting motor (462), the ring-cutting cylinder (464), the peeling cylinder (441), the shaft-cutting cylinder (42), and the drive motor (22) are all electrically connected to the controller. When the cable to be connected (6) is clamped in the fixed channel and the end of the cable to be connected (6) passes through the peeling hole, the controller can first control the ring-cutting cylinder (464) to drive the ring-cutting piece (465) to approach and break the outermost retaining ring on the cable to be connected (6). After the protective layer (62) is removed, the circumferential cutting motor (462) drives the circumferential cutting seat (461) to move the circumferential cutting piece (465) around the cable to be connected (6) once. Finally, after the axial cutting cylinder (42) drives the axial cutting piece (43) to approach and break the outermost protective layer (62) on the cable to be connected (6), the drive motor (22) is controlled to rotate the lead screw (21) to drive the axial shift seat (41) to approach the end of the cable to be connected (6).

7. The installation device for a cable joint in a photovoltaic power generation area according to claim 6, characterized in that: The peeling assembly (4) further includes a radial shift plate (47), a radial shift cylinder (48), two shaft cutting parts (43) and two shaft cutting cylinders (42). A radial shift groove is provided on the shaft shift seat (41) along the width direction of the base (1), and a mounting post (411) is provided on the shaft shift seat (41) at the end of the radial shift groove away from the fixed channel. The bottom end of the radial shift plate (47) is inserted into the radial shift groove and can move closer to or away from the mounting post (411) along the radial shift groove. The radial shift cylinder (48), the peeling cylinder (441) and the fixed hinge shaft (442) are all provided on the plate surface of the radial shift plate (47). The piston rod of the radial shift cylinder (48) is connected to the mounting post (411) and can drive the radial shift plate (47) to move along the radial shift groove. The assembly (45) and the axial cutting component (43) are each corresponding to the axial cutting cylinder (42). The cylinder body of each axial cutting cylinder (42) is located on the corresponding assembly (45), and each axial cutting component (43) is located on the piston rod of the corresponding axial cutting cylinder (42). The end of each axial cutting component (43) near the center of the peeling hole can be assembled with each other to form a cutting edge extending along the length direction of the base (1). The controller is electrically connected to the radial displacement cylinder (48). When the axial cutting piece (43) moves to the end of the cable to be connected (6), the controller can simultaneously control the piston rods of the peeling cylinder (441) and the radial displacement cylinder (48) to retract into the cylinder body, so that the two axial cutting pieces (43) move away from each other while approaching the mounting post (411) and peeling off the cut protective layer (62) from the cable to be connected (6).

8. The installation device for a cable joint in a photovoltaic power generation area according to claim 7, characterized in that: Each of the axial cutting cylinders (42) has a mounting block (421) on its piston rod, and each mounting block (421) has a deformation groove. The groove wall of the deformation groove is provided with a deformation shaft along the length direction of the base (1). Each axial cutting component (43) has a cutting surface (431) and a fixing surface (432) on the side away from its own cutting edge. Each axial cutting component (43) is hinged to the corresponding deformation shaft. The junction of the cutting surface (431) and the fixing surface (432) is chamfered around the deformation shaft. When two axial cutting components (43) are joined together, a buffer component (433) is provided on the side of the two axial cutting components (43) that are joined together. When the two axial cutting parts (43) are far apart from each other, each cutting surface (431) abuts against the side wall of the deformation groove away from its own groove opening, and restricts the cutting edge of the axial cutting part (43) to turn around the deformation axis to the center of the peeling hole. When the fixed surface (432) abuts against the side wall of the deformation groove away from its own groove opening, the buffer (433) faces the center of the peeling hole, and the controller can control the axial cutting cylinder (42) to drive the axial cutting part (43) to move the buffer (433) closer to the center of the peeling hole, and abut the cable to be connected (6) between the buffer (433) and the hole wall of the peeling hole.

9. The installation device for a cable joint in a photovoltaic power generation area according to claim 4, characterized in that: Each of the assembled blocks (31) has a limiting groove. The peeling assembly (4) includes two shaft shift seats (41). The internal threads of the two threaded holes have opposite directions. The lead screw (21) has two threaded segments with opposite directions symmetrically arranged along its own length. Each threaded hole is screwed to the corresponding threaded segment so that the drive motor (22) can drive the two shaft shift seats (41) to move closer or further away from each other by driving the lead screw (21) to rotate. Each of the shaft shift seats (41) is provided with a limiting block (412) on the side near the hot melt mold (3). The limiting block (412) corresponds to the limiting groove. When the two assembly blocks (31) are assembled together, the drive motor (22) can control the two shaft shift seats (41) to move closer to each other and insert each limiting block (412) into the corresponding limiting groove to restrict the two assembly blocks (31) from moving away from each other.

10. An installation device for a cable joint in a photovoltaic power generation area according to claim 2, characterized in that: It also includes the filling box (7), which includes a receiving part (71), a filling part (72), two sealing sleeves (73) and two hole caps (74). The receiving part (71) and the filling part (72) are detachably connected, and the receiving part (71) and the filling part (72) can be assembled to form a filling sleeve suitable for being fitted onto the cable to be connected (6). The two sealing sleeves (73) correspond one-to-one with the two ends of the filling sleeve. Each sealing sleeve (73) can be fitted onto the cable to be connected (6) and seal the gap between the corresponding end of the filling sleeve and the cable to be connected (6). The filling part (72) has two through holes for filling glue or venting. The hole caps (74) correspond one-to-one with the through holes of the filling part (72). Each hole cap (74) can seal the corresponding through hole of the filling part (72).

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