CN115662688A

CN115662688A - Environment-friendly flame-retardant cable and manufacturing method thereof

Info

Publication number: CN115662688A
Application number: CN202211340502.XA
Authority: CN
Inventors: 李样水; 杨平
Original assignee: Hubei Nanyuan Cable Technology Co ltd
Current assignee: Hubei Nanyuan Cable Technology Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-01-31

Abstract

The application discloses environmental protection flame retarded cable and manufacturing method thereof relates to cable production technical field, and it includes conductor and sleeve, the conductor with shielding layer, filling layer, fire-retardant layer and armor have set gradually by interior outside to between the sleeve, the sleeve is made by plastics extrusion molding, and the cable that will have the sleeve is put into the basin and is soaked the cooling, uses the roll forming device to carry out roll forming simultaneously. This application has the effect that improves cable production quality.

Description

Environment-friendly flame-retardant cable and manufacturing method thereof

Technical Field

The application relates to the technical field of cable production, in particular to an environment-friendly flame-retardant cable and a manufacturing method thereof.

Background

A cable is a conductor made of one or more mutually insulated conductors and an outer insulating protective layer that carries power or information from one location to another. Each group of conductors is insulated from each other and twisted around a center, and the entire cable is covered with a highly insulating covering. The cable has the characteristics of internal electrification and external insulation.

The cable is manufactured by three processes of drawing, stranding and coating. Drawing is that the conductor is forced to pass through a die under the action of external force, the cross section area of the copper conductor is compressed, and thus the conductor with the required cross section area shape and size is obtained; twisting is to interweave two or more conductors together in a specified direction; the coating is that different materials are coated outside the stranded conductor by adopting special equipment according to different performance requirements of the cable. The coating process comprises extrusion coating, longitudinal coating, lapping, dip coating and the like. The existing cable insulation layer is formed by melting plastic particles by an extruding machine and uniformly extruding the plastic particles on the periphery of a conductor, so that the periphery of the conductor is uniformly coated with a plastic insulation sleeve.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: because the cable can produce in production transmission process and rock, the plastics insulation sleeve that is located extruding machine discharge gate department simultaneously still is in the high temperature state, and the plastics insulation layer can drop towards ground direction under the effect of rocking and gravity of cable for the wall thickness that plastics insulation sleeve is close to ground one side is thicker, thereby makes its conductor of cable after the shaping and insulation sleeve not coaxial, and then has influenced the quality of cable.

Disclosure of Invention

In order to solve the problem that the quality of a cable is poor due to the fact that a conductor of the cable and an insulating sleeve are not coaxial, the application provides an environment-friendly flame-retardant cable and a manufacturing method thereof.

First aspect, the application provides an environmental protection flame retarded cable adopts following technical scheme:

the utility model provides an environmental protection flame retarded cable, includes conductor and sleeve, the conductor with by interior shielding layer, filling layer, fire-retardant layer and the armor of having set gradually outside to between the sleeve, the sleeve is made by plastics extrusion molding.

By adopting the technical scheme, the shielding layer is coated outside the conductor, so that the interference of signals among a plurality of conductors in the cable is avoided as much as possible; the filling layer is coated on the periphery of the shielding layer, so that the bending resistance of the cable can be enhanced, and the service life of the cable is prolonged; the flame-retardant layer is coated on the periphery of the filling layer, so that the cable has flame-retardant performance, and the fire resistance of the cable is improved; the armor layer is coated on the periphery of the flame-retardant layer, so that the impact resistance of the cable is improved; the armor periphery cladding has by plastics extrusion molding's sleeve, can effectively avoid the electric leakage problem that the cable produced on the one hand, and on the other hand can strengthen the wear resistance of cable.

In a second aspect, the present application provides a method for manufacturing an environment-friendly flame-retardant cable, which adopts the following technical scheme:

the manufacturing method of the environment-friendly flame-retardant cable comprises the following steps of:

s1, drawing, namely stretching and pressing a conductor;

s2, stranding, namely winding and interweaving a plurality of drawn conductors to form a core body;

s3, wrapping once, namely winding and wrapping the metal film around the periphery of the core body to form a shielding layer;

s4, secondary lapping and filling, wherein mica sheets are wound around the periphery of the cores with the shielding layers, and filler is added between every two adjacent cores;

s5, longitudinally wrapping, namely winding and wrapping the metal sheet at the periphery of the mica sheet, and hermetically connecting two sides of the metal sheet to form an armor layer;

s6, performing extrusion molding, namely melting the plastic by using a plastic extruding machine, and performing extrusion molding outside the armor layer to form a sleeve;

and S7, cooling and forming, namely putting the cable with the sleeve into a water tank for soaking and cooling, and simultaneously performing roll forming by using a roll forming device.

By adopting the technical scheme, the conductor is stretched firstly, so that the shape and the size of the cross section of the conductor meet the design requirements; then winding and interweaving the plurality of stretched conductors to form a core body; then winding and wrapping the metal film around the core body, so that the metal film forms a shielding layer and the stable transmission of cable signals is guaranteed; filling and wrapping the filling materials around the plurality of cores with the shielding layers respectively, and wrapping the filling materials and the cores with mica sheets in a winding manner, so that the cable has better bending resistance and flame retardance; bending the metal sheet and sealing and wrapping the metal sheet at the periphery of the mica sheet to form an armor layer, so that the shock resistance of the cable is improved; at last, the plastic extruding machine is penetrated through the cable with the armor layer, the plastic extruding machine melts plastics and forms a sleeve through plastic extruding, the sleeve is sleeved on the periphery of the armor layer, the sleeve penetrates out of the plastic extruding machine and then enters the water tank, the water in the water tank soaks and cools the sleeve, and meanwhile, the roll forming device rolls the sleeve, so that the wall thickness of the sleeve is the same as far as possible, and the problem that the quality of the cable is poor due to the fact that the conductor of the cable is not coaxial with the sleeve is solved.

Optionally, the roll forming device includes a shaping ring and a plurality of shaping wheels located in the shaping ring, the shaping ring is rotatably connected in the water tank, the sleeve penetrates through the shaping ring, the shaping wheels are pressed against the outer circumferential wall of the sleeve in a rolling manner, a central axis of a circle formed by the plurality of shaping wheels and the central axis of the shaping ring are arranged in a collinear manner, and a driving mechanism for driving the shaping ring to rotate is arranged on the water tank.

Through adopting above-mentioned technical scheme, the setting of shaping ring is worn to establish by the sleeve in the basin, and the equal roll extrusion butt of a plurality of shaping wheels is on the sleeve periphery wall, because the axis of the circle that a plurality of shaping wheels enclose to close and close the formation sets up with the axis collineation of shaping ring, drives about the shaping ring along with actuating mechanism and rotates for the cable sleeve is the same basically at everywhere wall thickness under the roll extrusion effect of a plurality of shaping wheels, has improved the conductor of cable and the not coaxial line of sleeve and has leaded to the poor problem of cable quality.

Optionally, a water circulation system is arranged on the water tank.

By adopting the technical scheme, the water circulation system can circulate the water in the water tank, and the water temperature in the water tank is ensured to be in a proper range as far as possible, so that the cooling forming effect on the sleeve is improved, and the quality of the cable is improved.

Optionally, the shaping ring is provided with a stirring member.

Through adopting above-mentioned technical scheme, along with the rotation of shaping ring, shaping ring moves stirring piece and rotates in the basin, makes the temperature evenly distributed in the basin as far as possible to improved the cooling shaping effect to the sleeve, and then improved the quality of cable.

Optionally, a sliding rod is slidably disposed on the shaping ring, the sliding rod is disposed along the radial direction of the shaping ring, the sliding rod slides along the radial direction of the shaping ring, the shaping wheel is connected with one end of the sliding rod, and an adjusting assembly for adjusting synchronous sliding of the sliding rods is disposed on the shaping ring.

Through adopting above-mentioned technical scheme, when the cable of different model sizes of production, accessible adjusting part orders about the slide bar and slides along the radial direction of shaping ring on shaping ring, and the slide bar drives the plastic wheel and slides to adjust the distance of plastic wheel to shaping ring center, make a plurality of plastic wheels on the shaping ring can carry out roll forming to the cable of different model sizes, improved roll forming device's commonality.

Optionally, an annular groove is formed in the end face of the shaping ring, a sliding hole for sliding the sliding rod is formed in the inner wall of the shaping ring, the sliding hole is communicated with the annular groove, the adjusting assembly comprises a guide block which is fixedly connected to one end, far away from the shaping wheel, of the sliding rod and provided with an inclined guide surface, a driving cylinder which is inserted into the annular groove and an elastic piece which drives the inclined guide surface of the guide block to be in elastic butt joint with the driving cylinder, the driving cylinder is arranged in a sliding mode along the depth direction of the annular groove, and a locking structure used for locking and fixing the driving cylinder is arranged on the shaping ring.

Through adopting above-mentioned technical scheme, when adjusting the position of plastic wheel on the plastic ring, order about the driving cylinder and peg graft in the ring channel, the oblique leading face of guide block under the order about of elastic component with the tip butt of driving cylinder, along with the driving cylinder moves towards the ring channel, the driving cylinder promotes the central direction motion of guide block towards the whole ring through oblique leading face, the guide block orders about the plastic wheel motion through the slide bar, thereby realize the position of quick adjustment plastic wheel on the plastic ring, it fixes the driving cylinder locking on the whole ring to use locking structure at last, make a plurality of plastic wheels on the whole ring can carry out roll forming to the cable of different model sizes, the commonality of roll forming device has been improved.

Optionally, a dust removal cylinder is arranged between the water tank and the plastic extruding machine, the sleeve penetrates through the dust removal cylinder, the roll forming device is located in the dust removal cylinder, and a dust removal system for removing dust on the sleeve is arranged on the dust removal cylinder.

Through adopting above-mentioned technical scheme, the sleeve can get into the dust removal section of thick bamboo before leaving the extruding machine and getting into the basin, starts dust pelletizing system, and dust pelletizing system can remove dust to the sleeve part that gets into in the dust removal section of thick bamboo, avoids being stained with the dust on the sleeve as far as possible simultaneously to avoid the sleeve to be wrapped in the sleeve by the dust when the cooling shrink. And the roll forming device is arranged in the dust removal cylinder, so that when the dust removal system removes dust from the sleeve, the roll forming device can roll and shape the sleeve, and the problem of poor quality of the cable caused by the fact that the conductor of the cable and the sleeve are not coaxial is solved.

Optionally, a drying cylinder is arranged at one end of the water tank, which is far away from the plastic extruding machine, the sleeve penetrates through the drying cylinder, the roll forming device is located in the drying cylinder, and a drying system for removing moisture on the sleeve is arranged on the drying cylinder.

Through adopting above-mentioned technical scheme, behind the cooling roll forming, the drying cylinder is worn to establish by the sleeve, starts drying system, and the drying cylinder carries out the drying to adnexed moisture on the sleeve periphery wall, and the roll forming device can carry out the roll extrusion plastic to the sleeve in the drying simultaneously, has further improved the conductor of cable and the not coaxial line of sleeve and has leaded to the poor problem of cable quality.

Optionally, the rotation direction of the shaping ring in the drying cylinder is opposite to the rotation direction of the shaping ring in the water tank and near one end of the drying cylinder;

the rotating direction of the integral ring positioned in the dust removing cylinder is opposite to the rotating direction of the integral ring positioned in the water tank and close to one end of the dust removing cylinder.

Through adopting above-mentioned technical scheme, adjacent two shaping ring's on the sleeve rotation direction is opposite for a plurality of shaping rings are when rotating the plastic to the sleeve, avoid as far as possible under the friction of multiunit plastic wheel, and the sleeve is twisted towards a direction only, thereby influences the intensity of sleeve tip.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the sleeve penetrates through the shaping ring in the water tank, the shaping wheels are in rolling and abutting connection with the outer peripheral wall of the sleeve, and the central axis of a circle formed by the enclosing of the shaping wheels and the central axis of the shaping ring are arranged in a collinear manner and are driven to rotate along with the driving mechanism, so that the wall thickness of the cable sleeve at each position is basically the same under the rolling action of the shaping wheels, and the problem of poor cable quality caused by the fact that a conductor of the cable and the sleeve are not coaxial is solved;

2. when cables of different types and sizes are produced, the sliding rod can be driven to slide on the shaping ring along the radial direction of the shaping ring through the adjusting component, and the sliding rod drives the shaping wheel to slide, so that the distance from the shaping wheel to the center of the shaping ring is adjusted, a plurality of shaping wheels on the shaping ring can roll-form the cables of different types and sizes, and the universality of the roll-forming device is improved;

3. the rotating directions of two adjacent shaping rings on the sleeve are opposite, so that when the shaping rings rotate to shape the sleeve, the sleeve is prevented from being twisted only in one direction under the friction action of a plurality of groups of shaping wheels as far as possible, and the strength of the end part of the sleeve is influenced.

Drawings

Fig. 1 is a schematic cross-sectional view of an environment-friendly flame-retardant cable according to an embodiment of the present application.

Fig. 2 is a schematic flow chart of a manufacturing method of an environment-friendly flame-retardant cable in an embodiment of the present application.

FIG. 3 is a schematic diagram showing the structures of an extruder, a water tank, a water circulating system, a dust removing cylinder and a drying cylinder in the example of the present application.

Fig. 4 is a schematic structural diagram of a water tank, a water circulation system, a dust removal cylinder, a dust removal system, a drying cylinder, a drying system and a driving mechanism in the embodiment of the application.

FIG. 5 is a schematic view showing the internal structure of the water tub, the dust removing cylinder and the drying cylinder in the embodiment of the present application.

FIG. 6 is a schematic structural diagram of the stirring piece, the integral ring, the supporting disk, the outer toothed ring and the driving cylinder in the embodiment of the application.

FIG. 7 is an exploded view of the stirring element, integral ring, support disk and drive cartridge of the embodiment of the present application.

Reference numerals: 1. a conductor; 2. a sleeve; 3. a shielding layer; 4. a filling layer; 5. a flame retardant layer; 6. an armor layer; 7. a plastic extruding machine; 8. a water tank; 9. a drain pipe; 10. a water circulation system; 101. a water inlet pipe; 102. a water pump; 103. a water outlet pipe; 11. a stirring member; 12. a slide bar; 131. a guide block; 132. a drive cylinder; 133. an elastic member; 14. an annular groove; 15. a slide hole; 16. a locking structure; 17. a dust removal cylinder; 18. a dust removal system; 181. an exhaust fan; 182. a conduit; 19. a drying cylinder; 20. a drying system; 201. an air pump; 202. an air tube; 21. a housing; 22. an integral ring; 23. a shaping wheel; 24. a drive mechanism; 241. a first drive gear; 242. a second drive gear; 243. a third drive gear; 244. a fourth drive gear; 245. a rotating rod; 246. a transmission assembly; 247. a motor; 25. a support disc; 26. a partition plate; 27. an outer toothed ring.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses an environment-friendly flame-retardant cable.

Referring to fig. 1, the environment-friendly flame-retardant cable comprises a conductor 1 and a sleeve 2, wherein a shielding layer 3, a filling layer 4, a flame-retardant layer 5 and an armor layer 6 are sequentially arranged between the conductor 1 and the sleeve 2 from inside to outside. The conductor 1 is made of copper material, and a plurality of conductors 1 are wound and interwoven to form a core body; the shielding layer 3 is made of a copper strip, and the copper strip is wound and coated on the periphery of the core body and is used for shielding signal interference between two adjacent core bodies; combining a plurality of cores with shielding layers 3, filling hemp ropes between two adjacent cores, and wrapping the hemp ropes at the periphery of the cores to form a filling layer 4; winding and wrapping the hemp rope and the core body by mica sheets so that the mica sheets form a flame-retardant layer 5 of the cable; and then bending the aluminum tape, coating the aluminum tape on the mica sheet and welding the aluminum tape to form the armor layer 6 of the cable.

The embodiment of the application also discloses a manufacturing method of the environment-friendly flame-retardant cable.

Referring to fig. 2, a method for manufacturing an environment-friendly flame-retardant cable includes the steps of:

s1, drawing, namely drawing and pressing the copper conductor 1 to enable the cross section area of the copper conductor 1 to be compressed, so that the copper conductor 1 with the required cross section area shape and size is obtained;

s2, stranding, namely winding and interweaving the plurality of drawn copper conductors 1 to form a core body;

s3, wrapping once, and winding and wrapping the copper strip film around the core body to form a shielding layer 3;

s4, secondary wrapping and filling, namely winding mica sheets around the periphery of the plurality of core bodies with the shielding layers 3, and simultaneously adding hemp ropes between every two adjacent core bodies for filling;

s5, longitudinally wrapping, namely bending and winding the aluminum tape and wrapping the aluminum tape on the periphery of the mica sheet, and hermetically connecting two sides of the aluminum tape to form an armor layer 6;

s6, performing extrusion molding, namely melting the plastic by using an extruder 7, and performing extrusion molding on the exterior of the armor layer 6 to form the sleeve 2;

and S7, cooling and forming, namely putting the cable with the sleeve 2 into a water tank 8 for soaking and cooling, and simultaneously performing roll forming by using a roll forming device.

Referring to fig. 3 and 4, the sleeve 2 is hot-melted and extruded around the armor 6 by the extruder 7, and when the sleeve 2 leaves the extruder 7, the sleeve 2 is still at a high temperature and has a certain viscosity. In order to reduce the effect that dust in the air is adhered to the sleeve 2 to influence the cooling and forming effect of the sleeve 2, a dust removing cylinder 17 is arranged between the water tank 8 and the plastic extruding machine 7, one end of the dust removing cylinder 17 is fixedly connected with the discharging end of the plastic extruding machine 7 through a screw, the other end of the dust removing cylinder 17 is welded with the feeding end of the water tank 8, and a dust removing system 18 for removing the dust on the sleeve 2 is arranged on the dust removing cylinder 17. The end of the water tank 8 far away from the extruder 7 is welded with a drying cylinder 19, and a drying system 20 for removing water on the sleeve 2 is arranged on the drying cylinder 19. A dust removal section of thick bamboo 17, basin 8 and a drying section of thick bamboo 19 all are cylindricly, and the axis collineation of three sets up, and dust removal section of thick bamboo 17, basin 8 and a drying section of thick bamboo 19 setting are worn to establish in proper order by sleeve 2, are provided with water circulating system 10 on the basin 8, and sleeve 2 soaks the aquatic in basin 8.

In order to prevent the water in the water tank 8 from overflowing from the inlet and flowing to the dust removal system 18 to affect the normal operation of the dust removal system 18 as much as possible, referring to fig. 4 and 5, a partition plate 26 is welded and fixed in the dust removal cylinder 17, the partition plate 26 is located at one end of the dust removal system 18 close to the water tank 8, the peripheral wall of the partition plate 26 is hermetically connected with the inner wall of the dust removal cylinder 17, and a cable is arranged to penetrate through the partition plate 26. Similarly, in order to ensure the normal operation of the drying system 20, a partition 26 is also welded and fixed in the drying cylinder 19, the partition 26 in the drying cylinder 19 is located on one side of the drying system 20 close to the water tank 8, the partition 26 is welded with the inner wall of the drying cylinder 19 in a sealing manner, and a cable is arranged through the partition 26 in the drying cylinder 19. After the water in the water tank 8 overflows into the drying cylinder 19 and the dust removing cylinder 17, in order to discharge the water in the drying cylinder 19 and the dust removing cylinder 17 quickly, the bottom walls of the drying cylinder 19 and the dust removing cylinder 17 are both communicated and welded with a drain pipe 9, and the drain pipe 9 is positioned on one side of the partition plate 26 close to the water tank 8.

Referring to fig. 4 and 5, the dust removing system 18 includes a suction fan 181 and a conduit 182, the suction fan 181 is disposed on the ground, one end of the conduit 182 is connected to an air inlet of the suction fan 181 through a flange, the other end is connected to the bottom wall of the dust removing cylinder 17, and the conduit 182 is communicated with the dust removing cylinder 17. The suction fan 181 is activated, and the suction fan 181 sucks air in the dust removing cylinder 17 through the conduit 182, so as to remove dust attached to the sleeve.

Referring to fig. 4 and 5, the water circulation system 10 includes a water inlet pipe 101, a water pump 102 and a water outlet pipe 103, the water pump 102 is placed on the ground, one end of the water outlet pipe 103 is connected with the water outlet end of the water pump 102 through a flange, and the other end penetrates through the bottom wall of the water tank 8 and is in sealed communication with the water tank 8. One end of the water inlet pipe 101 is connected with the water inlet end of the water pump 102 through a flange, and the other end of the water inlet pipe penetrates through the side wall of the water tank 8 and is communicated with the water tank 8 in a sealing mode. The water inlet pipe 101 and the water outlet pipe 103 are made of materials with good heat conduction materials, and water temperature in the water tank 8 is always kept in a certain stable range along with circulation of water, so that the cooling forming effect on the sleeve 2 is guaranteed.

Referring to fig. 4 and 5, the drying system 20 includes an air pump 201 and an air pipe 202, the air pump 201 is placed on the ground, and the air pipe 202 includes a plurality of annular pipes, a communicating pipe for communicating the plurality of annular pipes, and a connecting pipe disposed in communication with the communicating pipe. The plurality of annular pipes are welded and fixed in the dust removing cylinder 17 at intervals along the length direction of the dust removing cylinder 17, and the plurality of annular pipes and the dust removing cylinder 17 are arranged coaxially. The communicating pipe is communicated with the plurality of annular pipes, one end of the connecting pipe is communicated with the communicating pipe in a welding mode, and the other end of the connecting pipe is connected with the air outlet end of the air pump 201. The annular pipe is gone up the intercommunication rigid coupling and is had a plurality of shower nozzles, and a plurality of shower nozzles all set up towards 2 directions of sleeve. The air pump 201 pumps air to a plurality of annular pipes through the connecting pipe and the communicating pipe, and the air in the annular pipes is sprayed out from a plurality of nozzles, so that moisture on the sleeve 2 is blown and swept, and the drying treatment of the sleeve 2 is completed.

Because the cable can produce when the transmission and rock, simultaneously along with under the effect of air pump 201 and air exhauster 181, the aggravation that rocks of cable to accelerated sleeve 2 to the speed that ground direction drooped, for improving sleeve 2's the drooping and lead to sleeve 2 big problem of wall thickness difference everywhere, refer to figure 4 and figure 5, the roll forming device is provided with a plurality ofly. In the embodiment of the present application, four roll forming devices are provided, one roll forming device is provided in each of the dust removing cylinder 17 and the drying cylinder 19, two roll forming devices are provided in the water tank 8, and the two roll forming devices are located at the inlet and the outlet of the water tank 8.

Referring to fig. 6 and 7, the roll forming device includes an integral ring 22 and a plurality of shaping wheels 23 located in the integral ring 22, a support plate 25 for rotatably connecting the integral ring 22 is fixedly connected in the dust removing cylinder 17, the water tank 8 and the drying cylinder 19 through screws, and a central axis of the support plate 25 is arranged in a collinear manner with a central axis of the water tank 8. The supporting disks 25 in the dedusting cylinder 17 and the drying cylinder 19 are both located on one side of the corresponding partition plate 26 away from the water tank 8, and the two supporting disks 25 in the water tank 8 are respectively located at two ends of the water tank 8. The shaping ring 22 and the supporting disk 25 are coaxially arranged, a rotating bearing is embedded at one end of the shaping ring 22, a connecting cylinder which is rotatably connected with the rotating bearing is welded at one end of the supporting disk 25, and the shaping ring 22 is coaxially and rotatably connected with the supporting disk 25 through the connecting cylinder. The cable is arranged by penetrating the supporting disc 25 and the shaping ring 22 during transmission.

Referring to fig. 6 and 7, the inner wall of the shaping ring 22 is provided with a plurality of sliding holes 15, in the embodiment of the present application, three sliding holes 15 are provided, and the three sliding holes 15 are circumferentially arranged along the inner wall of the shaping ring 22 at intervals. An annular groove 14 is formed in the end face, away from the supporting disc 25, of the shaping ring 22, the annular groove 14 and the shaping ring 22 are coaxially arranged, and the annular groove 14 is communicated with the sliding hole 15. A sliding rod 12 is arranged in the sliding hole 15 in a sliding manner, one end of the sliding rod 12 close to the center of the shaping ring 22 is rotatably connected with a shaping wheel 23, the sliding rod 12 is arranged along the radial direction of the shaping ring 22, and the sliding rod 12 drives the shaping wheel 23 to slide along the radial direction of the shaping ring 22.

Referring to fig. 6 and 7, the shaping ring 22 is provided with an adjusting assembly for adjusting the synchronous sliding of the plurality of sliding rods 12, and the adjusting assembly includes a guide block 131 fixedly connected to an end of the sliding rod 12 away from the shaping wheel 23 and having an inclined guide surface, a driving cylinder 132 inserted into the annular groove 14, and an elastic member 133 driving the inclined guide surface of the guide block 131 to elastically abut against the driving cylinder 132. The inclined guide surface of the guide block 131 is disposed toward the annular groove 14; the elastic member 133 is a spring, the spring is sleeved on the sliding rod 12, and one end of the spring is fixedly connected with the sliding rod 12, and the other end of the spring is fixedly connected with the inner wall of the sliding hole 15; the driving cylinder 132 is slidably disposed in the depth direction of the annular groove 14, and the end of the driving cylinder 132 abuts against the inclined guide surface of the guide block 131. The driving cylinder 132 is pushed towards the direction close to the supporting disk 25, the driving cylinder 132 pushes the guide block 131 and the sliding rod 12 to slide in the sliding hole 15 through the inclined guide surface of the guide block 131, the sliding rod 12 pushes the shaping wheel 23 to move towards the direction close to the center of the shaping ring 22, the central axis of a circle formed by the enclosing of the shaping wheels 23 and the central axis of the shaping ring 22 are arranged in a collinear manner, and the shaping wheel 23 is in rolling abutment on the outer peripheral wall of the sleeve 2, so that the shaping wheels 23 on the shaping ring 22 can perform rolling forming on cables of different models and sizes.

In order to stably roll the shaping wheel 23 on the peripheral wall of the sleeve 2, referring to fig. 6 and 7, the shaping ring 22 is provided with a locking structure 16 for locking and fixing the driving cylinder 132. In the embodiment of the present application, the locking structure 16 is an internal thread disposed on the inner wall of the annular groove 14 of the shaping ring 22, an external thread adapted to the internal thread is disposed on the outer peripheral wall of the driving cylinder 132, the driving cylinder 132 is driven to rotate on the shaping ring 22, so as to adjust the depth of the driving cylinder 132 inserted into the annular groove 14, and the position of the shaping wheel 23 is adjusted, and meanwhile, the driving cylinder 132 is locked and fixed on the shaping ring 22 under the combined action of the internal thread and the external thread, so that the shaping wheel 23 is stably rolled on the sleeve 2.

In other embodiments, the locking structure 16 is a locking screw, a threaded hole connected with the locking screw is formed in the outer wall of the shaping ring 22, the threaded hole is communicated with the annular groove 14, and the locking screw is abutted against the outer wall of the driving cylinder 132 by rotating the locking screw, so that the driving cylinder 132 is quickly locked.

In order to make the thickness of the sleeve 2 as uniform as possible in the same section, the water tank 8 is provided with a drive mechanism 24 for driving the rotation of the shaping ring 22, with reference to fig. 5 and 7. The top of the dust removing cylinder 17, the water tank 8 and the drying cylinder 19 is provided with a cover 21, and a driving mechanism 24 is positioned in the cover 21. The shaping ring 22 is coaxially sleeved with and fixed with an outer toothed ring 27, the tops of the dedusting cylinder 17, the water tank 8 and the drying cylinder 19 are provided with jacks, and the outer toothed ring 27 is partially penetrated through and arranged in the jacks. The driving mechanism 24 comprises a first driving gear 241, a second driving gear 242, a third driving gear 243 and a fourth driving gear 244 which are respectively meshed with the outer gear rings 27 on the four integral rings 22, and the driving mechanism 24 further comprises four rotating rods 245, a transmission assembly 246 and a motor 247; the four rotating rods 245 are respectively connected to the tops of the dust removing cylinder 17, the water tank 8 and the drying cylinder 19 in a rotating mode through supports, and the first driving gear 241, the second driving gear 242, the third driving gear 243 and the fourth driving gear 244 are respectively fixedly connected with one ends of the four rotating rods 245.

Referring to fig. 5 and 7, three sets of transmission assemblies 246 are provided, the three sets of transmission assemblies 246 are respectively located between two adjacent rotating rods 245, each transmission assembly 246 includes a driving gear and a driven gear, the driving gear and the driven gear are respectively coaxially and fixedly connected to the end portions, close to each other, of the two adjacent rotating rods 245, and the driving gear and the driven gear are meshed. The motor 247 is fixedly connected to the top of the dust removing cylinder 17, and the output end of the motor 247 is coaxially and fixedly connected to the end of the rotating rod 245 on the dust removing cylinder 17 through a coupling.

Motor 247 is activated, motor 247 rotates first drive gear 241, second drive gear 242, third drive gear 243, and fourth drive gear 244 via rotating rod 245 and transmission assembly 246, and first drive gear 241, second drive gear 242, third drive gear 243, and fourth drive gear 244 rotates four integral rings 22 via outer ring 27, respectively. At this time, the rotating direction of the shaping ring 22 in the drying cylinder 19 is opposite to the rotating direction of the shaping ring 22 in the water tank 8 and near one end of the drying cylinder 19; the direction of rotation of the shaping ring 22 located in the dirt-removing cylinder 17 is opposite to the direction of rotation of the shaping ring 22 located in the water tank 8 and near one end of the dirt-removing cylinder 17. When the four shaping rings 22 are used for rotationally shaping the sleeve 2, the sleeve 2 is prevented from being twisted in only one direction under the friction action of the four shaping wheels 23 as much as possible, so that the strength of the end part of the sleeve 2 is influenced.

In order to further improve the cooling forming quality of the sleeve 2, referring to fig. 5 and 7, the two shaping rings 22 located in the water tank 8 are each provided with a stirring member 11, the stirring members 11 are configured as stirring blades, each shaping ring 22 corresponds to four stirring blades, the stirring blades are fixedly connected to one end of the shaping ring 22 far away from the driving cylinder 132 through screws, and the connection positions of the stirring blades and the shaping rings 22 are located in the supporting disk 25. Along with the rotation of shaping ring 22, shaping ring 22 drives the stirring leaf and rotates in basin 8, makes the temperature evenly distributed in the basin 8 as far as possible to improved the cooling shaping effect to sleeve 2, and then improved the quality of cable.

The implementation principle of the manufacturing method of the environment-friendly flame-retardant cable in the embodiment of the application is as follows: firstly, stretching the copper conductor 1 to enable the shape and the size of the cross section of the copper conductor 1 to meet the design requirements; then winding and interweaving a plurality of stretched copper conductors 1 to form a core body; then winding and wrapping the copper strip film around the core body, so that the copper strip film forms a shielding layer 3, and stable transmission of cable signals is guaranteed; mica sheets are wound around the periphery of the cores with the shielding layers 3, and hemp ropes are added between every two adjacent cores for filling, so that the cable has good bending resistance and flame retardance; bending and winding the aluminum tape and coating the aluminum tape on the periphery of the mica sheet, and hermetically connecting two sides of the aluminum tape to form an armor layer 6, so that the shock resistance of the cable is improved; and finally, the cable with the armor layer 6 is arranged in a plastic extruding machine 7 in a penetrating mode, the plastic extruding machine 7 melts and performs plastic extruding forming to form the sleeve 2, and the sleeve 2 is sleeved on the periphery of the armor layer 6.

The driving cylinder 132 is rotated, the driving cylinder 132 drives the three shaping wheels 23 on the shaping ring 22 to move towards the center of the shaping ring 22 synchronously, so that the three shaping wheels 23 can abut against the peripheral wall of the sleeve 2.

Then the driving mechanism 24, the water circulation system 10 and the drying system 20, the four shaping rings 22 drive the four shaping wheels 23 to rotate. The sleeve 2 passes out of the plastic extruding machine 7 and enters the dust removing cylinder 17, and the dust removing system 18 adsorbs dust attached to the sleeve 2 in the rotating rolling shaping process of the shaping wheel 23. The sleeve 2 after dust removal enters the water tank 8 for cooling and forming, and at the moment, the two groups of shaping wheels 23 shape the sleeve 2 in the cooling process, so that the wall thickness of the sleeve 2 on the same section is basically the same. The sleeve 2 after being cooled and formed enters a drying cylinder 19, and a drying system 20 performs drying treatment on the moisture on the sleeve 2 in the rolling shaping process of a shaping wheel 23.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An environmental protection flame retarded cable, includes conductor (1) and sleeve (2), its characterized in that: the cable is characterized in that a shielding layer (3), a filling layer (4), a flame-retardant layer (5) and an armor layer (6) are sequentially arranged between the conductor (1) and the sleeve (2) from inside to outside, and the sleeve (2) is made by plastic extrusion molding.

2. A manufacturing method of an environment-friendly flame-retardant cable is characterized by comprising the following steps: the environment-friendly flame-retardant cable based on claim 1, wherein the manufacturing method of the environment-friendly flame-retardant cable comprises the following steps:

s1, drawing, namely stretching and pressing the conductor (1);

s2, stranding, namely winding and interweaving the plurality of drawn conductors (1) to form a core body;

s3, wrapping once, namely winding and wrapping the metal film around the core body to form a shielding layer (3);

s4, secondary lapping and filling, wherein mica sheets are wound around the periphery of the cores with the shielding layers (3), and filler is added between every two adjacent cores;

s5, longitudinally wrapping, namely winding and wrapping the metal sheet on the periphery of the mica sheet, and hermetically connecting two sides of the metal sheet to form an armor layer (6);

s6, extruding, namely melting the plastic by using an extruder (7), and extruding and molding the sleeve (2) outside the armor layer (6);

s7, cooling and forming, namely putting the cable with the sleeve (2) into a water tank (8) for soaking and cooling, and simultaneously performing roll forming by using a roll forming device.

3. The method for manufacturing the environment-friendly flame-retardant cable according to claim 2, wherein: the roll forming device comprises an integral ring (22) and a plurality of shaping wheels (23) positioned in the integral ring (22), the integral ring (22) is rotatably connected in the water tank (8), the sleeve (2) penetrates through the integral ring (22), the shaping wheels (23) are in rolling abutment on the outer peripheral wall of the sleeve (2), the central axis of a circle formed by enclosing the shaping wheels (23) and the central axis of the integral ring (22) are arranged in a collinear manner, and a driving mechanism (24) for driving the integral ring (22) to rotate is arranged on the water tank (8).

4. The method for manufacturing the environment-friendly flame-retardant cable according to claim 3, wherein: and a water circulation system (10) is arranged on the water tank (8).

5. The method for manufacturing the environment-friendly flame-retardant cable according to claim 3, wherein: the integral ring (22) is provided with a stirring piece (11).

6. The method for manufacturing the environment-friendly flame-retardant cable according to claim 3, wherein the method comprises the following steps: the shaping ring (22) is provided with a sliding rod (12) in a sliding mode, the sliding rod (12) is arranged along the radial direction of the shaping ring (22), the sliding rod (12) slides along the radial direction of the shaping ring (22), the shaping wheel (23) is connected with one end of the sliding rod (12), and the shaping ring (22) is provided with an adjusting component used for adjusting the synchronous sliding of the sliding rod (12).

7. The method for manufacturing the environment-friendly flame-retardant cable according to claim 6, wherein: the end face of the shaping ring (22) is provided with an annular groove (14), the inner wall of the shaping ring (22) is provided with a sliding hole (15) for the sliding of the sliding rod (12), the sliding hole (15) is communicated with the annular groove (14), the adjusting component comprises a guide block (131) which is fixedly connected to one end, far away from one end of the shaping wheel (23), of the sliding rod (12) and is provided with an inclined guide surface, a driving cylinder (132) inserted into the annular groove (14) and an elastic piece (133) driving the inclined guide surface of the guide block (131) to be elastically abutted against the driving cylinder (132), the driving cylinder (132) is arranged in a sliding mode along the depth direction of the annular groove (14), and the shaping ring (22) is provided with a locking structure (16) for locking and fixing the driving cylinder (132).

8. The method for manufacturing the environment-friendly flame-retardant cable according to claim 3, wherein: a dust removal cylinder (17) is arranged between the water tank (8) and the plastic extruding machine (7), the sleeve (2) penetrates through the dust removal cylinder (17), the roll forming device is located in the dust removal cylinder (17), and a dust removal system (18) used for removing dust on the sleeve (2) is arranged on the dust removal cylinder (17).

9. The method for manufacturing the environment-friendly flame-retardant cable according to claim 8, wherein: one end, far away from the plastic extruding machine (7), of the water tank (8) is provided with a drying cylinder (19), the sleeve (2) penetrates through the drying cylinder (19), the roll forming device is located in the drying cylinder (19), and a drying system (20) used for removing moisture on the sleeve (2) is arranged on the drying cylinder (19).

10. The method for manufacturing the environment-friendly flame-retardant cable according to claim 9, wherein: the rotation direction of the integral ring (22) in the drying cylinder (19) is opposite to the rotation direction of the integral ring (22) which is positioned in the water tank (8) and is close to one end of the drying cylinder (19);

the rotating direction of the integral ring (22) positioned in the dust removing cylinder (17) is opposite to the rotating direction of the integral ring (22) positioned in the water tank (8) and close to one end of the dust removing cylinder (17).