A preparation process for a low-smoke, halogen-free, heat-resistant and environmentally friendly medium-voltage cable

Abstract

The present invention relates to the technical field of cable manufacturing, and particularly relates to a preparation process for a low-smoke, halogen-free, heat-resistant and environmentally friendly medium-voltage cable, including the processes: S1, stranding; S2, extruding an insulating layer; S3, wrapping a waterproof layer; S4, armoring; S5, wrapping an outer sheath; S6, cable forming and packaging; in step S3, a wrapping device is used to wind a waterproof tape around a conductor; the wrapping device includes a base, and a first gear ring is rotatably inserted on the outer wall of the base, and a mounting frame is welded on the outer wall of the first gear ring along the diameter direction. In the present invention, through the provided linkage frame, when the wrapping is completed, the motor is controlled to stop suddenly, so that the counterweight loses the action of centrifugal force and moves and resets under the action of the spring, thereby enabling the feeding rod to drive the waterproof tape away from the conductor. At the same time, under the action of the first rack and the second gear ring, the linkage frame drives the heating wire to rotate clockwise, so that the heating wire intersects with the waterproof tape and cuts it off, and the elastic piece can dial the cut-off part of the waterproof tape towards the conductor to achieve a sealing effect.

Description

Technical Field

[0001] The invention belongs to the technical field of cable manufacturing, and particularly relates to a preparation process for a low-smoke, halogen-free, heat-resistant and environment-friendly medium-voltage cable. Background Art

[0002] When manufacturing a cable, it is necessary to wind a waterproof layer outside the insulating layer to prevent moisture from entering the cable while maintaining the electrical characteristics of the cable, avoid the conductor from being eroded by moisture, and thus effectively extend the service life of the cable.

[0003] However, in the prior art when winding the waterproof tape, first, it is necessary to manually wind the waterproof tape around the conductor preliminarily, and then it can be automatically wound by equipment. Moreover, when the winding of the cable is completed, it is also necessary to manually cut the waterproof tape, which greatly affects the winding efficiency. Summary of the Invention

[0004] The purpose of the invention is to solve the problems in the background art, and a preparation process for a low-smoke, halogen-free, heat-resistant and environment-friendly medium-voltage cable is proposed.

[0005] In order to achieve the above purpose, the invention adopts the following technical scheme:

[0006] A preparation process for a low-smoke, halogen-free, heat-resistant and environment-friendly medium-voltage cable includes the steps: S1, stranding; S2, extruding an insulating layer; S3, winding a waterproof layer; S4, armoring; S5, wrapping an outer sheath; S6, cabling and packaging.

[0007] In step S3, a winding device is used to wind the waterproof tape around the conductor.

[0008] The winding device includes a base. A first gear ring is rotatably inserted on the outer wall of the base. An installation frame is welded on the outer wall of the first gear ring along the diameter direction. A through hole for the conductor to pass through is reserved at the center of the installation frame. A counterweight block is slidably inserted on the outer wall of one end of the installation frame. A feeding rod is welded on the outer wall of the counterweight block close to the center of the first gear ring. A material guiding groove is formed on the outer wall of the feeding rod far from the counterweight block. A limiting groove is formed on the right outer wall of the material guiding groove. A bracket is welded on the outer wall of the base. A tubular linkage is rotatably inserted on the outer wall of the bracket through a slip ring electrical component. The linkage and the first gear ring are coaxially distributed. A connecting column is welded on the outer wall of the linkage close to the first gear ring. The connecting column penetrates through the installation frame. The connecting column is adapted to the limiting groove. A second gear ring is welded on the end wall of the connecting column. A heating wire is arranged between the second gear ring and the linkage.

[0009] In the above preparation process for a low-smoke, halogen-free, heat-resistant and environment-friendly medium-voltage cable, a motor is welded on the outer wall of the base. A gear is welded on the main shaft of the motor. The gear meshes with the first gear ring.

[0010] In the above-mentioned preparation process of a low-smoke, halogen-free, heat-resistant and environmentally friendly medium-voltage cable, a magnet is slidably inserted into the left inner wall of the material guiding groove. The magnet can adsorb on the inner wall of the material guiding groove. A first stop block is welded on the inner wall of the mounting frame, and the first stop block is adapted to the magnet.

[0011] In the above-mentioned preparation process of a low-smoke, halogen-free, heat-resistant and environmentally friendly medium-voltage cable, a spring piece is welded on the outer wall of the connecting column, and the spring piece points to the center of the first gear ring.

[0012] In the above-mentioned preparation process of a low-smoke, halogen-free, heat-resistant and environmentally friendly medium-voltage cable, a spring is welded between the outer wall of the counterweight and the outer wall of the mounting frame. A first rack is welded on the bottom outer wall of the counterweight, and the first rack meshes with the second gear ring.

[0013] In the above-mentioned preparation process of a low-smoke, halogen-free, heat-resistant and environmentally friendly medium-voltage cable, a feeding wheel is rotatably connected to the outer wall of the mounting frame through a quick-release joint. A waterproof tape is wound around the outer wall of the feeding wheel, and the free end of the waterproof tape passes through the material guiding groove.

[0014] In the above-mentioned preparation process of a low-smoke, halogen-free, heat-resistant and environmentally friendly medium-voltage cable, a floating block is slidably inserted into the outer wall of the mounting frame on the side away from the counterweight. Avoidance grooves are provided on the outer walls of the counterweight and the floating block.

[0015] In the above-mentioned preparation process of a low-smoke, halogen-free, heat-resistant and environmentally friendly medium-voltage cable, a supporting rod is welded on the outer wall of the floating block on the side close to the center of the first gear ring. The ends of the supporting rod and the material pushing rod are both arc-shaped and adapted to the conductor. Pressing wheels are provided at the ends of the supporting rod and the material pushing rod. A second rack is welded on the top outer wall of the floating block, and the second rack meshes with the second gear ring.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. By providing the counterweight, under the action of centrifugal force, the counterweight drives the material pushing rod to approach the conductor. The end of the material pushing rod can squeeze the waterproof tape to fit the outer wall of the conductor. Then, in cooperation with the first gear ring driving the feeding wheel to rotate around the conductor, the effect of automatic winding is achieved, eliminating the need for manual preliminary winding by workers, greatly improving work efficiency. And when the connecting column slides into the limiting groove, the inner wall of the limiting groove squeezes the spring piece to deflect, so that the spring piece abuts against the heating wire. Thus, under the action of heat transfer, after the spring piece is heated, it can heat the waterproof tape in the material guiding groove, causing it to melt to a certain extent without being directly cut off by the heating wire, thereby increasing the adhesion of the waterproof tape and preventing the wound waterproof tape from loosening, improving the winding effect;

[0018] 2. Through the set linkage frame, when the winding is completed, the control motor is suddenly stopped, so that the counterweight loses the action of centrifugal force and moves back under the action of the spring, thereby enabling the material pushing rod to drive the waterproof tape away from the conductor. At the same time, under the action of the first rack and the second gear ring, the linkage frame drives the heating wire to rotate clockwise, so that the heating wire intersects with the waterproof tape and cuts it off, and the elastic piece can push the cut part of the waterproof tape towards the conductor to achieve the sealing effect. Description of the Drawings

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a three-dimensional sectional view of the base of the present invention.

[0021] Figure 3 This is a three-dimensional schematic diagram of the first gear ring of the present invention.

[0022] Figure 4 This is a three-dimensional schematic diagram of the counterweight and the floating block of the present invention.

[0023] Figure 5 This is a three-dimensional schematic diagram of the linkage frame of the present invention.

[0024] Figure 6 This is a sectional view of the initial state of the counterweight and the linkage frame of the present invention.

[0025] Figure 7 This is a three-dimensional schematic diagram of the working state of the overall structure of the present invention.

[0026] Figure 8 This is a sectional view of the working state of the counterweight and the linkage frame of the present invention.

[0027] In the figure: 1. Base; 11. Bracket; 2. First gear ring; 21. Mounting frame; 211. First stop block; 22. Feeding wheel; 221. Waterproof tape; 3. Counterweight; 31. Spring; 32. Material pushing rod; 321. Pressing wheel; 322. Material guiding groove; 323. Limiting groove; 33. First rack; 34. Magnet; 4. Linkage frame; 41. Connecting column; 411. Elastic piece; 42. Second gear ring; 43. Heating wire; 5. Floating block; 51. Supporting rod; 52. Second rack; 53. Avoidance groove; 8. Motor; 81. Gear; 9. Conductor. Detailed Embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0030] Please refer to Figures 1 - 8 , the present invention provides a preparation process for a low-smoke, halogen-free, heat-resistant and environmentally friendly medium-voltage cable, including the processes: S1, stranding; S2, extruding an insulating layer; S3, wrapping a waterproof layer; S4, armoring; S5, wrapping an outer sheath; S6, cable forming and packaging;

[0031] In step S3, a wrapping device is used to wind the waterproof tape 221 around the conductor 9;

[0032] The wrapping device includes a base 1. A first gear ring 2 is rotatably inserted into the outer wall of the base 1. An installation frame 21 is welded to the outer wall of the first gear ring 2 along the diameter direction. A through hole for the conductor 9 to pass through is reserved at the center of the installation frame 21. A counterweight block 3 is slidably inserted into the outer wall of one end of the installation frame 21. A feeding rod 32 is welded to the outer wall of the counterweight block 3 on the side close to the center of the first gear ring 2. A material guiding groove 322 is formed on the outer wall of the feeding rod 32 away from the counterweight block 3. A limiting groove 323 is formed on the right outer wall of the material guiding groove 322. A support 11 is welded to the outer wall of the base 1. A tubular linkage 4 is rotatably inserted into the outer wall of the support 11 through a slip ring electrical component. The linkage 4 and the first gear ring 2 are coaxially distributed. A connecting column 41 is welded to the outer wall of the linkage 4 close to the first gear ring 2. The connecting column 41 penetrates through the installation frame 21 and is adapted to the limiting groove 323. A second gear ring 42 is welded to the end wall of the connecting column 41. A heating wire 43 is arranged between the second gear ring 42 and the linkage 4. A motor 8 is welded to the outer wall of the base 1. A gear 81 is welded to the main shaft of the motor 8. The gear 81 meshes with the first gear ring 2. A magnet 34 is slidably inserted into the left inner wall of the material guiding groove 322. The magnet 34 can be adsorbed on the inner wall of the material guiding groove 322. A first stop block 211 is welded to the inner wall of the installation frame 21. The first stop block 211 is adapted to the magnet 34. A spring piece 411 is welded to the outer wall of the connecting column 41. The spring piece 411 points to the center of the first gear ring 2. A spring 31 is welded between the outer wall of the counterweight block 3 and the outer wall of the installation frame 21. A first rack 33 is welded to the bottom outer wall of the counterweight block 3. The first rack 33 meshes with the second gear ring 42.

[0033] A tubular linkage 4 is rotatably inserted on the outer wall of the bracket 11 through a slip ring electrical component. The stator part of the slip ring is fixed on the bracket 11, and the rotor part of the slip ring is connected to the linkage 4, realizing power supply to the heating wire 43 during the rotation of the linkage 4. Slip ring power supply is a relatively mature existing technology and will not be elaborated here.

[0034] In the initial state, as Figure 6 described, under the action of the spring 31, the counterweight 3 is close to the center of the first gear ring 2, and the material pushing rod 32 pushes the waterproof tape 221 away from the conductor 9. At the same time, under the meshing action of the first rack 33 and the second gear ring 42, the linkage 4 drives the heating wire 43 to rotate to the cutting station. And at this time, the magnet 34 is not blocked by the first stopper 211, so that the magnet 34 can adsorb on the inner wall of the material guiding groove 322, thereby being able to clamp the waterproof tape 221 in the material guiding groove 322, avoiding the situation that the waterproof tape 221 falls off from the material guiding groove 322 when the first gear ring 2 starts to rotate, resulting in the inability to wind smoothly.

[0035] For further elaboration of the above content: During operation, the conductor 9 is passed through the mounting frame 21 and the linkage 4 and then fixed on the winding equipment. The motor 8 is started and the equipment is controlled to wind the conductor 9. Under the meshing action of the gear 81 and the first gear ring 2, the first gear ring 2 drives the mounting frame 21 to rotate clockwise. Under the action of centrifugal force, the counterweight 3 compresses the spring 31 and moves away from the conductor 9, so that the counterweight 3 drives the material pushing rod 32 to approach the conductor 9. The material pushing rod 32 drives the free end of the waterproof tape 221 to approach the conductor 9. The end of the material pushing rod 32 can squeeze the waterproof tape 221 to fit the outer wall of the conductor 9. Coupled with the first gear ring 2 driving the feeding wheel 22 to rotate around the conductor 9, the effect of automatic winding is achieved, eliminating the need for manual preliminary winding by workers and greatly improving work efficiency. When the material pushing rod 32 is about to abut against the conductor 9, the first stopper 211 blocks the magnet 34, causing the magnet 34 to move away from the material guiding groove 322, so that the waterproof tape 221 is released. At the same time, during the above process, the counterweight 3 drives the second gear ring 42 to rotate counterclockwise through the first rack 33, as Figure 8As shown in the figure, at this time, the second gear ring 42 drives the linkage frame 4 to rotate. When the linkage frame 4 drives the connecting column 41 to slide into the limiting groove 323 on the material pushing rod 32, the linkage frame 4 drives the heating wire 43 to rotate in the same direction as the first gear ring 2, so that the heating wire 43 can avoid the waterproof belt 221. Moreover, when the connecting column 41 slides into the limiting groove 323, the inner wall of the limiting groove 323 squeezes the elastic piece 411 to deflect, so that the elastic piece 411 abuts against the heating wire 43. Thus, under the action of heat transfer, after the elastic piece 411 is heated, it can heat the waterproof belt 221 in the material guiding groove 322, making it melt to a certain extent without being directly cut off by the heating wire 43. Furthermore, the adhesion of the waterproof belt 221 can be increased, the wound waterproof belt 221 can be prevented from loosening, and the winding effect can be improved. When the winding is completed, the motor 8 is controlled to stop suddenly, so that the counterweight 3 loses the action of centrifugal force and moves back to its original position under the action of the spring 31. As a result, the material pushing rod 32 drives the waterproof belt 221 away from the conductor 9. At the same time, under the action of the first rack 33 and the second gear ring 42, the linkage frame 4 drives the heating wire 43 to rotate clockwise, so that the heating wire 43 intersects with the waterproof belt 221 and cuts it off.

[0036] Specifically, a feeding wheel 22 is rotatably connected to the outer wall of the mounting frame 21 through a quick-release joint. A waterproof belt 221 is wound around the outer wall of the feeding wheel 22. The free end of the waterproof belt 221 passes through the material guiding groove 322. A floating block 5 is slidably inserted into the outer wall of the mounting frame 21 on the side far from the counterweight 3. Avoidance grooves 53 are formed on the outer walls of the counterweight 3 and the floating block 5. A supporting rod 51 is welded to the outer wall of the floating block 5 on the side close to the center of the first gear ring 2. The ends of the supporting rod 51 and the material pushing rod 32 are both arc-shaped and adapted to the conductor 9. Pressing wheels 321 are provided at the ends of the supporting rod 51 and the material pushing rod 32. A second rack 52 is welded to the top outer wall of the floating block 5, and the second rack 52 meshes with the second gear ring 42.

[0037] A feeding wheel 22 is rotatably connected to the outer wall of the mounting frame 21 through a quick-release joint, which is convenient for replacing the feeding wheel 22.

[0038] In the initial state, as Figure 6 shown, under the action of the second rack 52 and the second gear ring 42, the floating block 5 drives the supporting rod 51 away from the conductor 9, realizing the avoidance of the connecting column 41 and the heating wire 43.

[0039] For further elaboration on the above content: During winding, as Figure 8As shown, the rack one 33 drives the ring gear two 42 to rotate. Under the meshing action of the ring gear two 42 and the rack two 52, the floating block 5 drives the supporting rod 51 to approach the conductor 9, so that the material pushing rod 32 and the supporting rod 51 clamp the conductor 9 from the upper and lower sides respectively, avoiding eccentric swing of the conductor 9, thus ensuring the winding effect. At the same time, the pressing wheel 321 can roll press the winding part of the conductor 9 to achieve a complete circular effect.

[0040] The working principle and usage process of the present invention: During operation, the conductor 9 is passed through the mounting frame 21 and the linkage frame 4 and fixed on the winding equipment. The motor 8 is started and the equipment is controlled to wind the conductor 9. Under the meshing action of the gear 81 and the ring gear one 2, the ring gear one 2 drives the mounting frame 21 to rotate clockwise. Under the action of centrifugal force, the counterweight block 3 drives the material pushing rod 32 to approach the conductor 9. The end of the material pushing rod 32 can squeeze the waterproof tape 221 to fit the outer wall of the conductor 9. Combined with the ring gear one 2 driving the feeding wheel 22 to rotate around the conductor 9, the effect of automatic winding is achieved, eliminating the need for manual preliminary winding by workers and greatly improving work efficiency. At the same time, during the above process, the counterweight block 3 drives the ring gear two 42 to rotate counterclockwise through the rack one 33. The ring gear two 42 drives the linkage frame 4 to rotate. When the linkage frame 4 drives the connecting column 41 to slide into the limiting groove 323 on the material pushing rod 32, the linkage frame 4 drives the heating wire 43 to rotate in the same direction as the ring gear one 2, so that the heating wire 43 can avoid the waterproof tape 221. And under the meshing action of the ring gear two 42 and the rack two 52, the floating block 5 drives the supporting rod 51 to approach the conductor 9, so that the material pushing rod 32 and the supporting rod 51 clamp the conductor 9 from the upper and lower sides respectively, avoiding eccentric swing of the conductor 9, thus ensuring the winding effect. At the same time, the pressing wheel 321 can roll press the winding part of the conductor 9 to achieve a complete circular effect. When the winding is completed, the motor 8 is controlled to stop suddenly, so that the counterweight block 3 loses the action of centrifugal force and moves back to its original position under the action of the spring 31, so that the material pushing rod 32 drives the waterproof tape 221 away from the conductor 9. At the same time, under the action of the rack one 33 and the ring gear two 42, the linkage frame 4 drives the heating wire 43 to rotate clockwise, so that the heating wire 43 intersects with the waterproof tape 221 and cuts it off, and the elastic piece 411 can push the cut part of the waterproof tape 221 towards the conductor 9 to achieve the sealing effect.

[0041] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A low-smoke, halogen-free, heat-resistant and environmentally friendly medium-voltage cable preparation process, characterized by: The process includes: S1, twisting; S2, extruding the insulation layer; S3, wrapping the waterproof layer; S4, armoring; S5, wrapping the outer sheath; S6, cable packaging; In step S3, a wrapping device is used to wrap the waterproof tape (221) around the conductor (9); The wrapping device comprises a base (1), a gear ring (2) is rotatably plugged into the outer wall of the base (1), a mounting frame (21) is welded to the outer wall of the gear ring (2) along the diameter direction, a through hole for accommodating the conductor (9) to pass through is reserved at the center of the mounting frame (21), a counterweight (3) is slidably plugged into the outer wall of one end of the mounting frame (21), a material moving rod (32) is welded to the outer wall of the counterweight (3) on the side close to the center of the gear ring (2), and a material guide groove (322) is provided on the outer wall of the end of the material moving rod (32) away from the counterweight (3), A limiting groove (323) is provided on the right outer wall of the guide groove (322), a bracket (11) is welded on the outer wall of the base (1), a tubular linkage frame (4) is rotatably plugged into the outer wall of the bracket (11) through a slip ring electrical component, the linkage frame (4) is coaxially distributed with the gear ring one (2), a connecting column (41) is welded on the outer wall of one end of the linkage frame (4) close to the gear ring one (2), the connecting column (41) penetrates the mounting frame (21), the connecting column (41) is adapted to the limiting groove (323), and the end wall of the connecting column (41) is welded There is a second gear ring (42), an electric heating wire (43) is arranged between the second gear ring (42) and the linkage frame (4), a spring (411) is welded on the outer wall of the connecting column (41), and the spring (411) points to the center of the circle of the first gear ring (2), a spring (31) is welded between the outer wall of the counterweight block (3) and the outer wall of the mounting frame (21), a rack (33) is welded on the outer wall of the bottom of the counterweight block (3), and the rack (33) and the second gear ring (42) are meshed with each other, and the mounting frame (21) is slidably plugged on the outer wall of the side away from the counterweight block (3) A floating block (5) is provided, and the outer walls of the counterweight block (3) and the floating block (5) are provided with avoidance grooves (53); a supporting rod (51) is welded on the outer wall of the floating block (5) on the side close to the center of the first gear ring (2); the ends of the supporting rod (51) and the material removal rod (32) are both arc-shaped and compatible with the conductor (9); the ends of the supporting rod (51) and the material removal rod (32) are both provided with clamping wheels (321); a second rack (52) is welded on the outer wall of the top of the floating block (5); the second rack (52) and the second gear ring (42) are meshed with each other.

2. A process for preparing a low-smoke, halogen-free, heat-resistant and environmentally friendly medium-voltage cable according to claim 1, characterized in that: A motor (8) is welded on the outer wall of the base (1), a gear (81) is welded on the main shaft of the motor (8), and the gear (81) is meshed with the gear ring 1 (2).

3. The process for preparing a low-smoke, halogen-free, heat-resistant and environmentally friendly medium-voltage cable according to claim 1, characterized in that: A magnet (34) is slidably inserted on the left inner wall of the material guide groove (322), and the magnet (34) can be adsorbed on the inner wall of the material guide groove (322). A stopper (211) is welded on the inner wall of the mounting frame (21), and the stopper (211) is compatible with the magnet (34).

4. The process for preparing a low-smoke, halogen-free, heat-resistant and environmentally friendly medium-voltage cable according to claim 1, characterized in that: A loading wheel (22) is rotatably connected to the outer wall of the mounting frame (21) via a quick-release joint, a waterproof belt (221) is wound around the outer wall of the loading wheel (22), and a free end of the waterproof belt (221) passes through a material guide groove (322).

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