Processing method and processing equipment for B1-grade flame-retardant fire-resistant medium-voltage cable

Abstract

The application discloses a B1-grade flame-retardant fire-resistant medium-voltage cable processing method and processing equipment, which comprises a fixed plate, three fixed rings are fixedly installed outside the fixed plate, and wire winding drums are installed inside the three fixed rings; through the secondary winding mode, the compactness and stability of the conductor can be further enhanced; in the first winding process, the conductor has been preliminarily wound together, but there may be some gaps or uneven places, and the second winding can correct and improve these deficiencies, so that the winding between the conductors is more compact and uniform, thereby improving the quality of the finished conductor, finally completing the production of the finished conductor, then the three finished conductors are led into the inside of the wire tube through the wire ring, and then the three finished conductors are led out according to requirements through the wire groove and the wire head in the wire drum, so that the finished conductor can accurately reach the designated use position, and the subsequent production or use requirements are met.

Description

Technical Field

[0001] This invention relates to the field of cable processing technology, specifically to a method and equipment for processing B1-grade flame-retardant and fire-resistant medium-voltage cables. Background Technology

[0002] With the increasing demands for stability and security in modern society, B1-grade flame-retardant and fire-resistant medium-voltage cables are being used more and more widely in various important locations. In large commercial buildings, such as shopping malls and office buildings, where there are dense crowds and numerous electrical devices, the consequences of a fire would be unimaginable. B1-grade flame-retardant and fire-resistant medium-voltage cables can effectively prevent the spread of fire, ensure the relatively stable operation of the power system, and provide necessary power support for personnel evacuation and fire rescue, thus becoming the preferred choice for power cabling in such buildings. In industrial sectors, such as chemical and power industries, where flammable and explosive hazards exist during production processes, the requirements for the flame-retardant and fire-resistant properties of cables are extremely high. B1-grade flame-retardant and fire-resistant medium-voltage cables, with their excellent performance, can meet the safety requirements of power transmission in industrial production, and market demand is showing a continuous growth trend.

[0003] In traditional conductor stranding equipment, the installation of the stranding reels is usually quite simple, lacking an effective fixing and locking mechanism. During the stranding process, the stranding reels are prone to loosening or displacement due to vibration and centrifugal force, resulting in uneven stranding pitch and affecting the structural stability and electrical performance of the cable. Most existing conductor stranding equipment uses a single stranding method, which cannot meet the special requirements of B1-class flame-retardant and fire-resistant medium-voltage cables for conductor structure. B1-class cables require a more compact and stable conductor structure to improve the cable's mechanical and fire-resistant properties. A single stranding method cannot achieve this complex conductor structure, making the cable susceptible to conductor loosening or breakage when subjected to external forces or high temperatures. Summary of the Invention

[0004] The purpose of this invention is to provide a processing method and equipment for B1-grade flame-retardant and fire-resistant medium-voltage cables, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a B1-grade flame-retardant and fire-resistant medium-voltage cable processing equipment, comprising a fixed plate, three fixed rings fixedly installed on the outer side of the fixed plate, and a stranded wire drum installed inside each of the three fixed rings. A rotating plate is rotatably installed inside one side of each stranded wire drum, and a primary stranded wire assembly is rotatably installed inside the rotating plate. A rotating plate is rotatably installed inside the other side of each stranded wire drum, and a secondary stranded wire assembly is rotatably installed inside the rotating plate. A drive assembly is installed inside each stranded wire drum. A connecting rod is installed on one side of the fixed plate, and a wire assembly is installed at the end of the connecting rod away from the fixed plate.

[0006] Preferably, each of the primary stranding assemblies includes a rotating sleeve, which is rotatably installed inside one side of the stranding drum. A driven toothed ring is fixedly installed on the outer side of one end of the rotating sleeve, and an anti-detachment ring is fixedly installed on the outer side of the end of the rotating sleeve away from the driven toothed ring. A stranding disc is snapped into the interior of each rotating sleeve, and a stranding hole is opened inside the stranding disc.

[0007] Preferably, anti-detachment ring 2 is fixedly installed on the outer side of the rotating sleeve, a rotating groove is opened inside one side of the strand drum, and anti-detachment ring 2 is rotatably installed inside the rotating groove. Four snap-fit ​​grooves are opened inside the rotating sleeve and anti-detachment ring 1. Four snap-fit ​​blocks are fixedly installed on the outer side of the stranding disc 1, and the four snap-fit ​​blocks are respectively snap-fitted into the four snap-fit ​​grooves.

[0008] Preferably, one side of the rotating sleeve has an arc-shaped groove II, and an arc-shaped magnet II is fixedly installed inside the arc-shaped groove II. The inside of the snap-fit ​​block has an arc-shaped groove I, and the inside of the snap-fit ​​groove has a locking groove II. The inside of the arc-shaped groove I has a locking groove I. A locking ring is snap-fitted inside the arc-shaped groove II and the arc-shaped groove I. Four locking pins are fixedly installed on one side of the locking ring, and the locking pins are snap-fitted inside the locking groove I and the locking groove II. Four arc-shaped magnets I are fixedly installed on the side of the locking ring where the locking pins are installed. The positions of the four arc-shaped magnets I and the four arc-shaped magnets II correspond to the positions of the four arc-shaped magnets II, and the magnetic poles of the opposite sides of the arc-shaped magnets I and II are opposite.

[0009] Preferably, the secondary stranding assembly includes a stranding disc two, the stranding disc two having a stranding hole two inside, a connecting lug two fixedly installed on the outer side of the stranding disc two, a connecting bent rod fixedly installed on one side of the connecting lug two, a connecting lug one fixedly installed at the end of the connecting bent rod away from the connecting lug two, and a wire ring fixedly installed inside the connecting lug one.

[0010] Preferably, the drive assembly includes a stranding motor, with a rotating rod one fixedly mounted on one output end of the stranding motor, a drive gear fixedly mounted on the end of the rotating rod one away from the stranding motor, and a rotating rod two fixedly mounted on the other output end of the stranding motor.

[0011] Preferably, the outer side of the drive gear meshes with the outer side of the rotating sleeve, the end of the rotating rod two away from the winch motor is fixedly connected to one side of the winch disc two, and the protective cover is sleeved on the outer side of the rotating rod two.

[0012] Preferably, the wire assembly includes a wire cylinder with a wire groove inside. One side of the wire groove is connected to a wire conduit, and a wire head is fixedly installed inside the other end of the wire groove.

[0013] A processing method for a B1-grade flame-retardant and fire-resistant medium-voltage cable processing equipment includes the following steps: S1: Conductor pretreatment: First, the conductor is cleaned by a multi-band ultrasonic cleaner at a temperature of 60 degrees Celsius for 5 minutes. After cleaning, it is dried in a hot air circulating drying oven at a temperature of 120 degrees Celsius for 30 minutes. S2: Conductor stranding; A1: Stranding preparation: Select an appropriate number of stranding discs with stranding holes one according to the number of conductors, and then snap the stranding discs one into the inside of the rotating sleeve to snap the snapping block into the inside of the snapping groove. Then snap the locking ring into the inside of the arc groove one and the snapping groove, and insert the locking pin into the inside of the locking groove one and the locking groove two, and make the arc magnet two and the arc magnet one attract together, thereby completing the fixation between the stranding discs one and the rotating sleeve; A2: Conductor stranding: Multiple processed conductors are passed through stranding hole one and then through stranding hole two inside stranding disc two. The stranding motor is then started. The output end of the stranding motor can drive rotating rod one to rotate, which in turn drives the drive gear to rotate, which in turn drives rotating sleeve to rotate. This rotating sleeve drives stranding disc one, which is installed inside rotating sleeve, to rotate, thus stranding the conductors inserted into multiple stranding holes one into one conductor. The other output end of the stranding motor can drive rotating rod two to rotate, which in turn drives stranding disc two to rotate, thus stranding the conductors inserted into stranding hole two inside stranding disc two again after stranding in stranding hole one, thus completing the finished conductor. A3: Finished conductor export: Then, the three finished conductors are passed through the wire loop into the inside of the wire tube, and then exported as required through the wire groove and wire head inside the wire tube. S3: Cable Forming: Three finished conductors are guided to a fully enclosed screw extruder, where three layers are co-extruded on the outside of the three finished conductors: inner, middle, and outer. The inner layer is a semi-conductive layer made of chemically cross-linked semi-conductive polyethylene; the middle layer is an insulating layer made of silane cross-linked polyethylene; and the outer layer is a semi-conductive layer made of ultra-smooth cross-linked semi-conductive composite material. A semi-conductive buffer layer is provided between the insulating outer shielding layer and the metal shielding layer. Then, a cable sheath is placed on the outside of the three finished conductors. Modified water glass-based inorganic gel is then filled between the cable sheath and the three finished conductors. Finally, an oxygen-barrier, heat-insulating, and fire-resistant layer and an outer sheath are sequentially placed on the outside of the cable sheath.

[0014] Compared with the prior art, the beneficial effects of the present invention are: through this secondary stranding method, the tightness and stability of the conductor can be further enhanced. In the first stranding process, although the conductors have been initially wrapped together, there may still be some gaps or unevenness. The second stranding can correct and improve these deficiencies, making the winding between the conductors tighter and more uniform, thereby improving the quality of the finished conductor and finally completing the production of the finished conductor. Then, the three finished conductors are passed through the wire ring into the inside of the wire tube, and then the three finished conductors are led out as required through the wire groove and wire head inside the wire tube, ensuring that the finished conductor can accurately reach the designated use position and meet the subsequent production or use requirements. A fully enclosed screw extruder is used to co-extrude three layers—inner, middle, and outer—on the three finished conductors. The inner layer is a chemically cross-linked semi-conductive polyethylene semi-conductive layer, which effectively uniformizes the electric field, reduces electric field concentration on the conductor surface, and improves the electrical safety of the cable. The middle layer is a silane cross-linked polyethylene insulation layer, which has good insulation, mechanical, and heat resistance properties, ensuring reliable power transmission during long-term operation. The outer layer is an ultra-smooth cross-linked semi-conductive composite material semi-conductive layer, which further optimizes the electric field distribution. At the same time, its ultra-smooth surface helps reduce friction and discharge phenomena between the cable and the external environment. This three-layer structure is rationally designed, with complementary material properties in each layer, jointly providing excellent electrical performance and mechanical protection for the cable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the three-dimensional appearance structure of the present invention.

[0016] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective.

[0017] Figure 3 This is a cross-sectional view of the stranded wire drum structure of the present invention.

[0018] Figure 4 This is a three-dimensional structural diagram of the driving component and the secondary twisted wire component of the present invention.

[0019] Figure 5 This is a schematic diagram of the exploded structure of the initial stranded wire assembly of the present invention.

[0020] Figure 6 This is an exploded view of the initial stranded wire assembly of the present invention.

[0021] Figure 7 This is a three-dimensional structural diagram of the wire assembly of the present invention.

[0022] In the diagram: 1. Twisted wire spool; 2. Wire spool; 3. Fixing ring; 4. Fixing plate; 5. Twisting hole two; 6. Connecting bent rod; 7. Connecting lug one; 8. Wire tube; 9. Wire end; 10. Twisting disc two; 11. Wire ring; 12. Connecting straight rod; 13. Locking ring; 14. Twisting hole one; 15. Twisting disc one; 16. Anti-detachment ring one; 17. Twisting motor; 18. Rotating rod two; 19. Rotating rod one; 20. Drive gear; 21. Connecting lug two; 22. Rotating sleeve; 23. Driven gear ring; 24. Protective cover; 25. Locking post; 26. Arc groove one; 27. Locking groove one; 28. Snap-fit ​​block; 29. ​​Arc groove two; 30. Anti-detachment ring two; 31. Snap-fit ​​groove; 32. Locking groove two; 33. Arc magnet one; 34. Arc magnet two. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0024] Please see Figures 1-7This invention provides a technical solution: a B1-grade flame-retardant and fire-resistant medium-voltage cable processing equipment, comprising a fixed plate 4, three fixed rings 3 fixedly installed on the outer side of the fixed plate 4, a stranded drum 1 installed inside each of the three fixed rings 3, a rotating plate 1 rotatably installed inside one side of each stranded drum 1, and a primary stranded assembly rotatably installed inside each rotating plate 1, each primary stranded assembly including a rotating sleeve 22, each rotating sleeve 22 rotatably installed inside one side of the stranded drum 1, a driven toothed ring 23 fixedly installed on the outer side of one end of each rotating sleeve 22, an anti-detachment ring 16 fixedly installed on the outer side of the end of each rotating sleeve 22 away from the driven toothed ring 23, and a stranding disc 15 snapped into the inner side of each rotating sleeve 22, each stranding disc 15 having a stranding hole 14 inside. Anti-detachment rings 2 and 30 are fixedly installed on the outer side of the rotating sleeve 22. A rotating groove is opened inside one side of the stranding drum 1, and the anti-detachment rings 2 and 30 are rotatably installed inside the rotating groove. Four locking grooves 31 are opened inside the rotating sleeve 22 and the anti-detachment rings 1 and 16. Four locking blocks 28 are fixedly installed on the outer side of the stranding disc 1 and 15. The four locking blocks 28 are respectively locked inside the four locking grooves 31. An arc-shaped groove 29 is opened on one side of the rotating sleeve 22. Arc-shaped magnets 2 and 34 are fixedly installed inside the arc-shaped grooves 29. An arc-shaped groove 26 is opened inside the locking block 28. A locking groove 22 is opened inside the locking groove 31. A locking groove 27 is opened inside the arc-shaped groove 26. Locking rings 1 are locked inside the arc-shaped grooves 29 and 26. 3. Four locking pins 25 are fixedly installed on one side of the locking ring 13, and the locking pins 25 are snapped into the inside of the locking groove 1 27 and the locking groove 2 32. Four arc-shaped magnets 1 33 are fixedly installed on the side of the locking ring 13 where the locking pins 25 are installed. The positions of the four arc-shaped magnets 1 33 correspond to the positions of the four arc-shaped magnets 2 34, and the magnetic poles of the opposite sides of the arc-shaped magnets 1 33 and the arc-shaped magnets 2 34 are opposite. Rotating plates 2 are rotatably installed inside the other side of the stranding drum 1, and secondary stranding assemblies are rotatably installed inside the rotating plates 2. The secondary stranding assembly includes a stranding disc 2 10. The stranding disc 2 10 has a stranding hole 2 5 inside. A connecting lug 2 21 is fixedly installed on the outside of the stranding disc 2 10. A connecting lug 2 is fixedly installed on one side of the connecting lug 2 21. A connecting rod 6 is connected to a connecting lug 7, which is fixedly installed at the end of the connecting rod 6 away from the connecting lug 21. A wire ring 11 is fixedly installed inside the connecting lug 7. A drive assembly is installed inside each stranding drum 1. The drive assembly includes a stranding motor 17. A rotating rod 19 is fixedly installed at one output end of the stranding motor 17. A drive gear 20 is fixedly installed at the end of the rotating rod 19 away from the stranding motor 17. A rotating rod 18 is fixedly installed at the other output end of the stranding motor 17. The outer side of the drive gear 20 meshes with the outer side of the rotating sleeve 22. The end of the rotating rod 18 away from the stranding motor 17 is fixedly connected to one side of the stranding disc 10. A protective cover 24 is sleeved on the outer side of the rotating rod 18. A connecting straight rod 12 is installed on one side of the fixing plate 4.A wire assembly is installed at the end of the connecting rod 12 away from the fixed plate 4. The wire assembly includes a wire cylinder 2, which has a wire groove inside. A wire tube 8 is connected to one side of each wire groove, and a wire head 9 is fixedly installed inside the other end of the wire groove.

[0025] The working principle of the above technical solution is as follows: Based on the number of conductors, select an appropriate number of stranding discs 15 with stranding holes 14. Then, snap the stranding discs 15 into the inside of the rotating sleeve 22, thereby snapping the snapping block 28 into the inside of the snapping groove 31. Next, snap the locking ring 13 into the inside of the arc-shaped groove 26 and the snapping groove 31, and insert the locking pin 25 into the inside of the locking groove 27 and the second locking groove 32. This causes the arc-shaped magnet 34 and the arc-shaped magnet 33 to attract each other, thus fixing the stranding discs 15 and the rotating sleeve 22. To ensure that the stranding disc 15 does not loosen or shift during the stranding process, the accuracy and quality of conductor stranding are guaranteed, reducing problems such as conductor damage or uneven stranding caused by equipment instability. Multiple prepared conductors are passed through stranding holes 14 and 5 inside the stranding disc 10. Then, the stranding motor 17 is started. The output of the stranding motor 17 drives the rotating rod 19 to rotate, which in turn drives the drive gear 20 to rotate, which in turn drives the rotating sleeve 22 to rotate, thus engaging the locking mechanism. The twisting disc 15, installed inside the rotating sleeve 22, rotates to twist the conductors inserted into the multiple twisting holes 14, thus twisting multiple wires into one. The other output end of the twisting motor 17 drives the rotating rod 18 to rotate, which in turn drives the twisting disc 10 to rotate, further twisting the conductors inserted into the twisting holes 14 inside the twisting disc 10, thus completing the finished conductor. This secondary twisting method further enhances the conductor's tightness and stability, improving upon the initial twisting. During the process, although the conductors have been initially wound together, there may still be some gaps or uneven areas. The second twisting can correct and improve these deficiencies, making the winding between the conductors tighter and more uniform, thereby improving the quality of the finished conductor and finally completing the production of the finished conductor. Then, the three finished conductors are passed through the wire ring 11 into the inside of the wire tube 8, and then the three finished conductors are led out as needed through the wire groove and wire head 9 inside the wire tube 2, ensuring that the finished conductors can accurately reach the designated use position and meet the subsequent production or use requirements.

[0026] A processing method for a B1-grade flame-retardant and fire-resistant medium-voltage cable processing equipment includes the following steps: S1: Conductor pretreatment: First, the conductor is cleaned by a multi-band ultrasonic cleaner at a temperature of 60 degrees Celsius for 5 minutes. After cleaning, it is dried in a hot air circulating drying oven at a temperature of 120 degrees Celsius for 30 minutes.

[0027] S2: Conductor stranding; A1: Stranding preparation: Select an appropriate number of stranding discs 15 with stranding holes 14 according to the number of conductors, and then snap the stranding discs 15 into the inside of the rotating sleeve 22 to snap the snapping block 28 into the inside of the snapping groove 31. Then snap the locking ring 13 into the inside of the arc groove 26 and the snapping groove 31, and insert the locking pin 25 into the inside of the locking groove 27 and the locking groove 32, and make the arc magnet 34 and the arc magnet 33 attract together, thereby completing the fixation between the stranding discs 15 and the rotating sleeve 22.

[0028] A2: Conductor stranding: Multiple processed conductors are passed through stranding holes 14 and then through stranding holes 5 inside stranding disc 10. The stranding motor 17 is then started. The output of the stranding motor 17 drives the rotating rod 19 to rotate, which in turn drives the drive gear 20 to rotate, which in turn drives the rotating sleeve 22 to rotate. This rotation of the rotating sleeve 22 causes the stranding disc 15, which is mounted inside the rotating sleeve 22, to rotate, thus stranding the conductors inserted through the multiple stranding holes 14 into one conductor. The other output of the stranding motor 17 drives the rotating rod 18 to rotate, which in turn drives the stranding disc 10 to rotate, further stranding the conductors inserted into the stranding holes 5 inside the stranding disc 10 after stranding through the stranding holes 14, thus completing the finished conductor.

[0029] A3: Finished conductor export: Then, the three finished conductors are passed through the wire ring 11 into the inside of the wire tube 8, and then exported as required through the wire groove and wire head 9 inside the wire tube 2.

[0030] S3: Cable Forming: Three finished conductors are guided to a fully enclosed screw extruder, where three layers are co-extruded on the outside of the three finished conductors: inner, middle, and outer. The inner layer is a semi-conductive layer made of chemically cross-linked semi-conductive polyethylene; the middle layer is an insulating layer made of silane cross-linked polyethylene; and the outer layer is a semi-conductive layer made of ultra-smooth cross-linked semi-conductive composite material. A semi-conductive buffer layer is provided between the insulating outer shielding layer and the metal shielding layer. Then, a cable sheath is placed on the outside of the three finished conductors. Modified water glass-based inorganic gel is then filled between the cable sheath and the three finished conductors. Finally, an oxygen-barrier, heat-insulating, and fire-resistant layer and an outer sheath are sequentially placed on the outside of the cable sheath.

[0031] A fully enclosed screw extruder is used to co-extrude three layers—inner, middle, and outer—on the three finished conductors. The inner layer is a chemically cross-linked semi-conductive polyethylene semi-conductive layer, which effectively homogenizes the electric field, reduces electric field concentration on the conductor surface, and improves the electrical safety of the cable. The middle layer is a silane cross-linked polyethylene insulation layer, which has good insulation, mechanical, and heat resistance properties, ensuring reliable power transmission during long-term operation. The outer layer is an ultra-smooth cross-linked semi-conductive composite material semi-conductive layer, further optimizing the electric field distribution. Its ultra-smooth surface also helps reduce friction and discharge phenomena between the cable and the external environment. This three-layer structure is rationally designed, with complementary material properties in each layer, providing excellent electrical performance and mechanical protection for the cable. A semi-conductive buffer layer is placed between the outer insulating shield and the metal shield. This buffer layer can withstand external forces or heat generation on the cable. During expansion and contraction, it acts as a buffer and disperses stress, effectively preventing damage caused by relative displacement or stress concentration between the insulation layer and the metal shielding layer, thus improving the overall reliability and service life of the cable. Modified water glass-based inorganic gel is filled between the cable sheath and the three finished conductors. This gel has good filling and sealing properties, which can fill the gaps between the conductors and the cable sheath, preventing moisture and humidity from entering the cable. At the same time, it also provides a certain degree of mechanical support and buffering. An oxygen-barrier, heat-insulating, and fire-resistant layer and an outer sheath are sequentially installed outside the cable sheath. The oxygen-barrier, heat-insulating, and fire-resistant layer can effectively prevent oxygen and heat from entering the cable, slowing down the burning rate of the cable in the event of a fire and improving the fire resistance of the cable. The outer sheath provides the final protection for the cable, resisting external mechanical damage, chemical corrosion, and environmental factors, ensuring that the cable can operate safely and stably in various harsh environments.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A B1-grade flame-retardant and fire-resistant medium-voltage cable processing equipment, comprising a fixing plate (4), characterized in that: Three fixing rings (3) are fixedly installed on the outside of the fixing plate (4). A stranded wire drum (1) is installed inside each of the three fixing rings (3). A rotating plate one is rotatably installed inside one side of the stranded wire drum (1), and a primary stranded wire assembly is rotatably installed inside the rotating plate one. A rotating plate two is rotatably installed inside the other side of the stranded wire drum (1), and a secondary stranded wire assembly is rotatably installed inside the rotating plate two. A drive assembly is installed inside the stranded wire drum (1). A connecting rod (12) is installed on one side of the fixing plate (4), and a wire assembly is installed at the end of the connecting rod (12) away from the fixing plate (4). Each primary stranded wire assembly includes a rotating sleeve (22), which is rotatably installed inside one side of the stranded wire drum (1). A driven toothed ring (23) is fixedly installed on the outer side of one end of the rotating sleeve (22). An anti-detachment ring (16) is fixedly installed on the outer side of the end of the rotating sleeve (22) away from the driven toothed ring (23). A stranding disc (15) is snapped into the interior of each rotating sleeve (22). A stranding hole (14) is opened inside the stranding disc (15). The secondary stranding assembly includes a stranding disc two (10), a stranding hole two (5) is provided inside the stranding disc two (10), a connecting lug two (21) is fixedly installed on the outside of the stranding disc two (10), a connecting bent rod (6) is fixedly installed on one side of the connecting lug two (21), a connecting lug one (7) is fixedly installed at the end of the connecting bent rod (6) away from the connecting lug two (21), and a wire ring (11) is fixedly installed inside the connecting lug one (7). The drive assembly includes a stranded motor (17), one of the output ends of the stranded motor (17) is fixedly mounted with a rotating rod one (19), the end of the rotating rod one (19) away from the stranded motor (17) is fixedly mounted with a drive gear (20), and the other output end of the stranded motor (17) is fixedly mounted with a rotating rod two (18). The outer side of the drive gear (20) meshes with the outer side of the rotating sleeve (22), and the end of the rotating rod (18) away from the winding motor (17) is fixedly connected to one side of the winding disc (10).

2. The B1-grade flame-retardant and fire-resistant medium-voltage cable processing equipment according to claim 1, characterized in that: Anti-detachment ring 2 (30) is fixedly installed on the outer side of the rotating sleeve (22). A rotating groove is opened inside one side of the strand drum (1), and anti-detachment ring 2 (30) is rotatably installed inside the rotating groove. Four snap-fit ​​grooves (31) are opened inside the rotating sleeve (22) and anti-detachment ring 1 (16). Four snap-fit ​​blocks (28) are fixedly installed on the outer side of the stranding disc 1 (15). The four snap-fit ​​blocks (28) are respectively snap-fitted into the four snap-fit ​​grooves (31).

3. The B1-grade flame-retardant and fire-resistant medium-voltage cable processing equipment according to claim 2, characterized in that: One side of the rotating sleeve (22) is provided with an arc-shaped groove two (29), and an arc-shaped magnet two (34) is fixedly installed inside the arc-shaped groove two (29). The inside of the snap-fit ​​block (28) is provided with an arc-shaped groove one (26). The inside of the snap-fit ​​groove (31) is provided with a locking groove two (32), and the inside of the arc-shaped groove one (26) is provided with a locking groove one (27). A locking ring (13) is snap-fitted inside the arc-shaped groove two (29) and the arc-shaped groove one (26). Four locking pins (25) are fixedly installed on one side of the locking ring (13), and the locking pins (25) are snapped into the inside of the locking groove one (27) and the locking groove two (32). Four arc-shaped magnets (33) are fixedly installed on the side of the locking ring (13) where the locking pins (25) are installed. The positions of the four arc-shaped magnets (33) correspond to the positions of the four arc-shaped magnets (34), and the magnetic poles of the opposite sides of the arc-shaped magnets (33) and the arc-shaped magnets (34) are opposite.

4. The B1-grade flame-retardant and fire-resistant medium-voltage cable processing equipment according to claim 1, characterized in that: The protective cover (24) is fitted onto the outside of the rotating rod (18).

5. The B1-grade flame-retardant and fire-resistant medium-voltage cable processing equipment according to claim 4, characterized in that: The wire assembly includes a wire cylinder (2), the inside of which is provided with a wire groove. One side of the wire groove is connected to a wire tube (8), and a wire head (9) is fixedly installed inside the other end of the wire groove.

6. A processing method for a B1-grade flame-retardant and fire-resistant medium-voltage cable processing equipment according to any one of claims 1-5, characterized in that: Includes the following steps: S1: Conductor pretreatment: First, the conductor is cleaned by a multi-band ultrasonic cleaner at a temperature of 60 degrees Celsius for 5 minutes. After cleaning, it is dried in a hot air circulating drying oven at a temperature of 120 degrees Celsius for 30 minutes. S2: Conductor stranding; A1: Stranding preparation: Select an appropriate number of stranding discs (15) with stranding holes (14) according to the number of conductors, and then snap the stranding discs (15) into the inside of the rotating sleeve (22) to snap the snapping block (28) into the inside of the snapping groove (31). Then snap the locking ring (13) into the inside of the arc groove (26) and the snapping groove (31), and insert the locking pin (25) into the inside of the locking groove (27) and the locking groove (32), and make the arc magnet (24) and the arc magnet (13) attract together, thereby completing the fixation between the stranding discs (15) and the rotating sleeve (22); A2: Conductor stranding: Pass multiple processed conductors through stranding hole one (14) and multiple conductors through stranding hole two (5) opened inside stranding disc two (10). Then start stranding motor (17). The output end of stranding motor (17) can drive rotating rod one (19) to rotate, thereby driving drive gear (20) to rotate, thereby driving rotating sleeve (22) to rotate, thereby driving rotating sleeve (22) to rotate, driving stranding disc one (15) installed inside rotating sleeve (22) to rotate, thereby stranding conductors inserted into multiple stranding holes one (14) into one wire. The other output end of stranding motor (17) can drive rotating rod two (18) to rotate, thereby driving stranding disc two (10) to rotate, thereby stranding conductors inserted into stranding hole two (5) inside stranding disc two (10) after stranding through stranding hole one (14) again, thereby completing the finished conductor. A3: Finished conductor export: Then, the three finished conductors are passed through the wire ring (11) into the inside of the wire tube (8), and then the three finished conductors are exported as required through the wire groove and wire head (9) inside the wire tube (2). S3: Cable Forming: Three finished conductors are guided to a fully enclosed screw extruder, where three layers are co-extruded on the outside of the three finished conductors: inner, middle, and outer. The inner layer is a semi-conductive layer made of chemically cross-linked semi-conductive polyethylene; the middle layer is an insulating layer made of silane cross-linked polyethylene; and the outer layer is a semi-conductive layer made of ultra-smooth cross-linked semi-conductive composite material. A semi-conductive buffer layer is provided between the insulating outer shielding layer and the metal shielding layer. Then, a cable sheath is placed on the outside of the three finished conductors. Modified water glass-based inorganic gel is then filled between the cable sheath and the three finished conductors. Finally, an oxygen-barrier, heat-insulating, and fire-resistant layer and an outer sheath are sequentially placed on the outside of the cable sheath.

Images