Preparation method of environmentally friendly flame-retardant cable and flame-retardant cable

Abstract

The present invention belongs to the field of cable production technology, and discloses a method for preparing an environmentally friendly flame-retardant cable and a flame-retardant cable, the specific steps of which are: S1: making a material into a monofilament and cleaning it; S2: twisting multiple monofilaments into a conductor; S3: wrapping an insulating material around the conductor; S4: wrapping the cable core; S5: extruding a sheath layer; S6: irradiating the insulating layer and the sheath layer; S7: annealing the copper conductor cable. The present invention divides the connecting base into two groups by a second fixed plate and a limit plate and a movable plate and a fixed frame. The two groups of connecting bases are staggered, and the connecting bases located on the movable plate and the fixed frame can be driven to move, thereby increasing the time gap between the two adjacent connecting bases to be sufficient for the connecting base to rotate with the wire reel fixed thereon. When rotating, the used wire reels and the wire reels with cables on both sides are swapped, thereby reducing the replacement process and improving the replacement efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of cable production, and in particular relates to a preparation method of an environmentally friendly flame-retardant cable and the flame-retardant cable. Background Art

[0002] During the cable production process, a frame stranding machine is required to strand long, large-cross-sectional aluminum / aluminum alloy wires, bare copper wires, steel-core aluminum stranded wires, and cross-linked compressed cable cores. While the frame stranding machine is in operation, the wire reels need to be replaced from time to time. During replacement, the used reels are first removed horizontally using a replacement mechanism. The device is moved to an open location and placed on the ground. The device is then moved to a different location, and the reels containing cables located elsewhere are taken to the fixture. Finally, the reels are moved to the frame stranding machine and loaded. This process is time-consuming, and the reels containing cables need to be aligned when they are taken to the fixture, otherwise the installation accuracy will be affected. Therefore, improvements are being made to address these issues. Summary of the Invention

[0003] In order to solve the problem proposed in the above background technology that the replacement process takes a long time and the cable reel needs to be aligned when it is taken to the clamp, otherwise it will affect the accuracy of installation, the present invention provides a preparation method of an environmentally friendly flame-retardant cable and a flame-retardant cable.

[0004] To achieve the above object, the present invention provides the following technical solution: a method for preparing an environmentally friendly flame-retardant cable, comprising the following specific steps:

[0005] S1: Select the material and draw it into a monofilament of the required diameter through a wire drawing machine, ensuring that the surface is smooth and free of burrs, and clean the surface of the monofilament;

[0006] S2: Use a frame stranding machine to strand multiple monofilaments into a conductor according to the specified pitch;

[0007] S3: Use a vacuum extruder to wrap the insulation material around the conductor;

[0008] S4: Use halogen-free flame-retardant glass fiber tape or ceramic silicone rubber tape to wrap around the cable core with an overlap rate of ≥50%. The speed of the wrapping machine is 200~400rpm to ensure that the flame retardant layer is flat.

[0009] S5: Use high torque extruder to extrude the sheath layer, the extrusion speed is 3~8m / min, the sheath thickness tolerance is ≤±0.1mm, and the surface is smooth and free of particles;

[0010] S6: Irradiate the insulation layer and sheath layer through an electron accelerator with a dose of 100~200kGy to improve the heat resistance and flame retardancy of the material;

[0011] S7: Copper conductor cables are annealed at 60-80°C for 12-24 hours to eliminate internal stress and improve bending performance.

[0012] Preferably, the frame stranding machine in step S2 also includes a replacement mechanism, which includes a walking bracket and a wire drum, a first connecting component is provided at the upper end of the walking bracket, a second connecting component is provided on the inner side of the first connecting component, a positioning and supporting component is provided on the surface of the second connecting component, and an adjustment component is provided on the positioning and supporting component.

[0013] Preferably, a vertical rod is installed on the surface of the walking bracket, and a first hydraulic cylinder is provided on the surface of the vertical rod, and a fixed end of the first hydraulic cylinder is hinged to the vertical rod.

[0014] Preferably, the first connecting assembly includes a first fixed plate, a guide rod, a movable plate, a second hydraulic cylinder and a fixed frame, the lower end of the first fixed plate is hinged to the walking frame, the upper end of the first fixed plate is movably connected to the movable plate through the guide rod, the first fixed plate and the movable plate are both able to slide on the surface of the guide rod, the fixed end of the second hydraulic cylinder is hinged to the first fixed plate, the movable end of the second hydraulic cylinder is hinged to the movable plate, the fixed frame is fixedly connected to the movable plate, and the movable end of the first hydraulic cylinder is hinged to the first fixed plate.

[0015] Preferably, the second connecting assembly includes a second fixing plate and a limiting plate, and the second fixing plate and the limiting plate are fixed to the inner side of the first fixing plate in sequence.

[0016] Preferably, the positioning and holding components are provided with two groups, and the two groups of positioning and holding components are staggered in sequence and arranged in a straight line. The positioning and holding components include a connecting base, a pneumatic clamp and a limit block, wherein one group of the connecting bases is rotatably connected to the second fixed plate and the limit plate, and the other group of the connecting bases is rotatably connected to the movable plate and the fixed frame, the pneumatic clamps are installed at the ends on both sides of the connecting base, and the limit blocks are installed at the ends on both sides of the surface of the connecting base adjacent to the pneumatic clamps;

[0017] When the second hydraulic cylinder is extended, the movable plate and the second hydraulic cylinder drive another group of positioning and supporting components arranged thereon to move, and at this time, each of the positioning and supporting components can rotate without obstacles.

[0018] Preferably, the adjustment assembly is provided with two groups, and the adjustment assembly includes a drive motor, a first gear, a second gear, a worm and a worm wheel. The drive motor is connected to the worm through the first gear and the second gear that are meshed with each other. The first gear is mounted on the output shaft of the drive motor, and the second gear is mounted on the worm. The worm is meshed with the worm wheel.

[0019] One group of the driving motors is mounted on the bottom of the movable plate, and the worm gears in the group are mounted on the top of the corresponding connecting base;

[0020] Another group of driving motors is mounted on the top of the second fixing plate, and the worm gears in this group are mounted on the bottom of the corresponding connecting base.

[0021] Preferably, the limiting block is trapezoidal, and when the wire reel is clamped by the pneumatic clamp, both ends thereof are in contact with the pneumatic clamp, and two adjacent pneumatic clamps at the same height that jointly limit a wire reel are trumpet-shaped.

[0022] An environmentally friendly flame-retardant cable is prepared using an environmentally friendly flame-retardant cable preparation method.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention divides the connecting base into two groups through the second fixed plate and the limit plate and the movable plate and the fixed frame. The two groups of connecting bases are staggered, and the connecting bases located on the movable plate and the fixed frame can be driven to move, so that the time gap between two adjacent connecting bases is increased to be sufficient to allow the connecting base to rotate with the cable reel fixed thereon. When rotating, the used cable reels and cable reels installed on both sides are swapped, thereby reducing the replacement process and improving the replacement efficiency.

[0025] The present invention uses a trumpet-shaped limiting block to limit the cable reel when taking and fixing the cable reel, so that the cable reel is located in the middle part of the trumpet-shaped limiting block, thereby realizing the positioning of the cable reel and ensuring the accuracy during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the frame stranding machine of the present invention;

[0027] Figure 2 This is a schematic diagram of the state when the cable reel with cables and the used cable reel are replaced;

[0028] Figure 3 It is a top view when the present invention is replaced;

[0029] Figure 4 A detailed structural diagram of the regulating assembly of the present invention;

[0030] Figure 5 A detailed structural diagram of the positioning and supporting assembly of the present invention;

[0031] Figure 6 For the present invention Figure 5 A is an enlarged schematic diagram;

[0032] Figure 7It is a front schematic diagram of the frame stranding machine of the present invention.

[0033] In the figure: 1. Traveling bracket; 11. Vertical rod; 12. First hydraulic cylinder; 13. Wire drum; 2. First connecting assembly; 201. First fixed plate; 202. Guide rod; 203. Movable plate; 204. Second hydraulic cylinder; 205. Fixed frame; 3. Second connecting assembly; 301. Second fixed plate; 302. Limit plate; 4. Positioning and supporting assembly; 401. Connecting base; 402. Pneumatic clamp; 403. Limit block; 5. Adjusting assembly; 501. Drive motor; 502. First gear; 503. Second gear; 504. Worm; 505. Worm wheel. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] The present invention provides a method for preparing an environmentally friendly flame-retardant cable, which comprises the following steps:

[0036] S1: Select the material and draw it into a monofilament of the required diameter through a wire drawing machine, ensuring that the surface is smooth and free of burrs, and clean the surface of the monofilament;

[0037] S2: Use a frame stranding machine to strand multiple monofilaments into a conductor according to the specified pitch;

[0038] S3: Use a vacuum extruder to wrap the insulation material around the conductor;

[0039] S4: Use halogen-free flame-retardant glass fiber tape or ceramic silicone rubber tape to wrap around the cable core with an overlap rate of ≥50%. The speed of the wrapping machine is 200~400rpm to ensure that the flame retardant layer is flat.

[0040] S5: Use high torque extruder to extrude the sheath layer, the extrusion speed is 3~8m / min, the sheath thickness tolerance is ≤±0.1mm, and the surface is smooth and free of particles;

[0041] S6: Irradiate the insulation layer and sheath layer through an electron accelerator with a dose of 100~200kGy to improve the heat resistance and flame retardancy of the material;

[0042] S7: Copper conductor cables are annealed at 60-80°C for 12-24 hours to eliminate internal stress and improve bending performance.

[0043] like Figure 1-7As shown, the frame stranding machine in step S2 also includes a replacement mechanism, which includes a traveling bracket 1 and a wire drum 13. A first connecting component 2 is provided on the upper end of the traveling bracket 1, a second connecting component 3 is provided on the inner side of the first connecting component 2, a positioning and holding component 4 is provided on the surface of the second connecting component 3, and an adjustment component 5 is provided on the positioning and holding component 4. A vertical rod 11 is installed on the surface of the traveling bracket 1, and a first hydraulic cylinder 12 is provided on the surface of the vertical rod 11. The fixed end of the first hydraulic cylinder 12 is hinged to the vertical rod 11;

[0044] The above solution is adopted: the frame stranding machine also includes a machine body, which is used to strand the wire, and a replacement mechanism is used to replace the used wire drum 13, and the walking frame 1 needs to walk on a guide rail. The guide rail belongs to the prior art and is well known to those skilled in the art, so it is not drawn in the figure;

[0045] By starting the first hydraulic cylinder 12, the first connecting component 2, the second connecting component 3, the positioning and supporting component 4 and the adjusting component 5 can be driven to flip together. During flipping, the cable drum 13 containing the cable can be clamped on the pneumatic clamp 402, and the used cable drum 13 can also be placed on the ground.

[0046] like Figure 2 As shown, the first connecting assembly 2 includes a first fixed plate 201, a guide rod 202, a movable plate 203, a second hydraulic cylinder 204 and a fixed frame 205. The lower end of the first fixed plate 201 is hinged to the walking frame 1, and the upper end of the first fixed plate 201 is movably connected to the movable plate 203 through the guide rod 202. The first fixed plate 201 and the movable plate 203 are both able to slide on the surface of the guide rod 202. The fixed end of the second hydraulic cylinder 204 is hinged to the first fixed plate 201, and the movable end of the second hydraulic cylinder 204 is hinged to the movable plate 203. The fixed frame 205 is fixedly connected to the movable plate 203, and the movable end of the first hydraulic cylinder 12 is hinged to the first fixed plate 201.

[0047] The above-mentioned solution is adopted: the movable plate 203 is guided by the guide rod 202, so that when the second hydraulic cylinder 204 is extended, the movable plate 203 moves along the axial direction of the guide rod 202 to the side away from the first fixed plate 201, thereby driving the positioning and supporting components 4 arranged on the movable plate 203 and the fixed frame 205 to move synchronously, so that the two adjacent positioning and supporting components 4 can be staggered, thereby providing space that will not be obstructed when the positioning and supporting components 4 rotate. When the positioning and supporting components 4 rotate, the used cable drums 13 and the cable drums 13 with cables on both sides of the positioning and supporting components 4 are exchanged, thereby reducing the process of replacing the cable drums 13 and improving the replacement efficiency.

[0048] like Figure 5As shown, the second connecting assembly 3 includes a second fixing plate 301 and a limiting plate 302, and the second fixing plate 301 and the limiting plate 302 are fixed to the inner side of the first fixing plate 201 in sequence;

[0049] The above solution is adopted: the second fixing plate 301 is used to provide a limit for the adjustment component 5 below the positioning and holding component 4, and the limit plate 302 can support and limit the positioning and holding component 4 to ensure stability during replacement.

[0050] like Figure 5 As shown, two groups of positioning and holding components 4 are provided, and the two groups of positioning and holding components 4 are staggered in sequence and arranged in a straight line. The positioning and holding components 4 include a connecting base 401, a pneumatic clamp 402 and a limit block 403. One group of connecting bases 401 is rotatably connected to the second fixed plate 301 and the limit plate 302, and the other group of connecting bases 401 is rotatably connected to the movable plate 203 and the fixing frame 205. The pneumatic clamp 402 is installed at the ends on both sides of the connecting base 401, and the limit blocks 403 are installed at the ends on both sides of the surface of the connecting base 401 adjacent to the pneumatic clamp 402;

[0051] When the second hydraulic cylinder 204 is extended, the movable plate 203 and the second hydraulic cylinder 204 drive another set of positioning and supporting components 4 arranged thereon to move. At this time, each positioning and supporting component 4 can rotate without any obstacles.

[0052] The limiting block 403 is trapezoidal. When the wire reel 13 is clamped by the pneumatic clamp 402, both ends of the limiting block 403 are in contact with the pneumatic clamp 402. Two adjacent pneumatic clamps 402 at the same height that jointly limit the wire reel 13 are horn-shaped.

[0053] The above solution is adopted: the connecting base 401 is divided into two groups by the second fixed plate 301 and the limiting plate 302, the movable plate 203 and the fixing frame 205. The two groups of connecting bases 401 are staggered, and the connecting bases 401 located on the movable plate 203 and the fixing frame 205 can be driven to move, so that the time gap between two adjacent connecting bases 401 is increased enough to allow the connecting base 401 to rotate with the cable reel 13 fixed thereon, thereby realizing the exchange of the used cable reel 13 and the cable reel 13 with the cable, thereby reducing the replacement time and improving the replacement efficiency;

[0054] The limit block 403 is in the shape of a trumpet, and when the cable reel 13 with the cables fixed thereon is taken, the cable reel 13 can be limited by its shape so that the cable reel 13 is located in the middle part of the trumpet-shaped limit block 403, thereby achieving the positioning of the cable reel 13 with the cables and ensuring the accuracy during installation.

[0055] like Figure 4 、 6As shown, the adjustment assembly 5 is provided with two groups, and the adjustment assembly 5 includes a driving motor 501, a first gear 502, a second gear 503, a worm 504 and a worm wheel 505. The driving motor 501 is connected to the worm 504 through the first gear 502 and the second gear 503 that are meshed with each other. The first gear 502 is mounted on the output shaft of the driving motor 501, and the second gear 503 is mounted on the worm 504. The worm 504 is meshed with the worm wheel 505.

[0056] One set of driving motors 501 is mounted on the bottom of the movable plate 203, and the worm gear 505 in the set is mounted on the top of the corresponding connecting base 401;

[0057] Another set of drive motors 501 is mounted on the top of the second fixed plate 301 , and the worm gear 505 in this set is mounted on the bottom of the corresponding connection base 401 ;

[0058] The above solution is adopted: the first gear 502 is driven to rotate by the driving motor 501, and the first gear 502 drives the worm 504 to rotate through the transmission of the second gear 503, and then drives the worm wheel 505 to rotate, so that the used cable drum 13 and the cable drum 13 with the cable are exchanged, ensuring the rationality of the device.

[0059] An environmentally friendly flame-retardant cable is prepared using an environmentally friendly flame-retardant cable preparation method.

[0060] The working principle and use process of the present invention:

[0061] When in use, first take the cable drum 13 with the cable, drive the first hydraulic cylinder 12 to extend, drive the first connecting component 2, the second connecting component 3, the positioning and holding component 4 and the adjusting component 5 to rotate synchronously with the hinge axis of the walking bracket 1 and the first fixed plate 201 as the center. During the rotation, the limit block 403 gradually contacts the cable drum 13 with the cable, and squeezes the cable drum 13 under its inclined shape, so that the cable drum 13 is gradually aligned with the connecting base 401, thereby ensuring the accuracy of the position of the cable drum 13. After alignment, the pneumatic clamp 402 on this side starts to hold the cable drum 13;

[0062] The first hydraulic cylinder 12 is shortened, and the traveling support 1 is moved along the guide rail to the frame stranding machine body. The pneumatic clamp 402 near the side of the frame stranding machine body is started to clamp and fix the used wire drum 13. Then the traveling support 1 moves a short distance in the opposite direction along the guide rail. Then the second hydraulic cylinder 204 is started to drive the movable plate 203 along the guide rod 202 away from the first fixed plate 201, and stops after moving to the maximum value. At this time, the two sets of drive motors 501 are started. The drive motor 501 drives the first gear 502 to rotate, and the first gear 502 drives the second gear 503 to rotate. The second gear 503 drives the worm 504 to rotate, the worm 504 drives the worm wheel 505 to rotate, and the rotation of the worm wheel 505 drives the connecting base 401 to rotate, so that the used wire drums 13 and the wire drums 13 with cables on both sides of the connecting base 401 are swapped. After the positions are swapped, the second hydraulic cylinder 204 is shortened so that the wire drums 13 with cables are arranged in a row. Finally, the traveling bracket 1 moves toward the frame stranding machine body to send the wire drums 13 with cables into the frame stranding machine body, and the used wire drums 13 are placed by the first hydraulic cylinder 12.

[0063] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0064] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing an environmentally friendly flame-retardant cable, characterized in that: The specific steps are: S1: Select the material and draw it into a monofilament of the required diameter through a wire drawing machine, ensuring that the surface is smooth and free of burrs, and clean the surface of the monofilament; S2: A frame stranding machine is used to strand multiple monofilaments into a conductor at a specified pitch. The frame stranding machine in step S2 further includes a replacement mechanism, the replacement mechanism including a traveling support (1) and a wire drum (13). The upper end of the traveling support (1) is provided with a first connecting component (2), the inner side of the first connecting component (2) is provided with a second connecting component (3), the surface of the second connecting component (3) is provided with a positioning and holding component (4), and the positioning and holding component (4) is provided with an adjustment component (5). The first connecting component (2) includes a first fixed plate (201), a guide rod (202), a movable plate (203), a second hydraulic cylinder (204) and a fixed frame (205). The first fixed plate (201) is provided with a first connecting component (201). The lower end is hinged to the walking bracket (1); the upper end of the first fixed plate (201) is movably connected to the movable plate (203) through the guide rod (202); the first fixed plate (201) and the movable plate (203) are both able to slide on the surface of the guide rod (202); the fixed end of the second hydraulic cylinder (204) is hinged to the first fixed plate (201); the movable end of the second hydraulic cylinder (204) is hinged to the movable plate (203); the fixed frame (205) is fixedly connected to the movable plate (203); the second connecting assembly (3) includes a second fixed plate (301) and a limiting plate (302); the second fixed plate (301) and the limiting plate (302) are fixed to the inner side of the first fixed plate (201) in sequence; S3: Use a vacuum extruder to wrap the insulation material around the conductor; S4: Use halogen-free flame-retardant glass fiber tape or ceramic silicone rubber tape to wrap around the cable core with an overlap rate of ≥50%. The speed of the wrapping machine is 200~400rpm to ensure that the flame retardant layer is flat. S5: Use high torque extruder to extrude the sheath layer, the extrusion speed is 3~8m / min, the sheath thickness tolerance is ≤±0.1mm, and the surface is smooth and free of particles; S6: Irradiate the insulation layer and sheath layer through an electron accelerator with a dose of 100~200kGy to improve the heat resistance and flame retardancy of the material; S7: Copper conductor cables are annealed at 60-80°C for 12-24 hours to eliminate internal stress and improve bending performance.

2. The method for preparing an environmentally friendly flame-retardant cable according to claim 1, characterized in that: A vertical rod (11) is installed on the surface of the walking bracket (1), a first hydraulic cylinder (12) is provided on the surface of the vertical rod (11), and a fixed end of the first hydraulic cylinder (12) is hinged to the vertical rod (11).

3. The method for preparing an environmentally friendly flame-retardant cable according to claim 2, characterized in that: The movable end of the first hydraulic cylinder (12) is hinged to the first fixed plate (201).

4. The method for preparing an environmentally friendly flame-retardant cable according to claim 3, characterized in that: The positioning and holding components (4) are provided with two groups, and the two groups of positioning and holding components (4) are staggered in sequence and arranged in a straight line. The positioning and holding components (4) include a connecting base (401), a pneumatic clamp (402) and a limit block (403), wherein one group of the connecting bases (401) is rotatably connected to the second fixed plate (301) and the limit plate (302), and the other group of the connecting bases (401) is rotatably connected to the movable plate (203) and the fixed frame (205), the pneumatic clamp (402) is installed at the ends on both sides of the connecting base (401), and the limit blocks (403) are installed at the ends on both sides of the surface of the connecting base (401) adjacent to the pneumatic clamp (402); When the second hydraulic cylinder (204) is extended, the movable plate (203) and the second hydraulic cylinder (204) drive another group of positioning and supporting components (4) arranged thereon to move, and at this time, each of the positioning and supporting components (4) can rotate without obstacles.

5. The method for preparing an environmentally friendly flame-retardant cable according to claim 4, characterized in that: The adjustment assembly (5) is provided with two groups, and the adjustment assembly (5) includes a driving motor (501), a first gear (502), a second gear (503), a worm (504) and a worm wheel (505). The driving motor (501) is connected to the worm (504) through the first gear (502) and the second gear (503) that are meshed with each other. The first gear (502) is mounted on the output shaft of the driving motor (501), and the second gear (503) is mounted on the worm (504). The worm (504) is meshed with the worm wheel (505). One group of the driving motors (501) is mounted on the bottom of the movable plate (203), and the worm gear (505) in the group is mounted on the top of the corresponding connecting base (401); Another group of driving motors (501) is mounted on the top of the second fixed plate (301), and the worm gear (505) in this group is mounted on the bottom of the corresponding connecting base (401).

6. The method for preparing an environmentally friendly flame-retardant cable according to claim 5, characterized in that: The limiting block (403) is trapezoidal in shape. When the wire drum (13) is clamped by the pneumatic clamp (402), both ends thereof are in contact with the pneumatic clamp (402). Two adjacent pneumatic clamps (402) at the same height that jointly limit the wire drum (13) are horn-shaped.

7. An environmentally friendly flame-retardant cable, characterized by: It is prepared using the preparation method of the environmentally friendly flame-retardant cable as described in claim 6.

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