Process for manufacturing a double core double layer cable and production device therefor

Abstract

The application relates to the technical field of cable manufacturing, in particular to a double-core double-layer cable manufacturing process and a production device thereof, and the technical scheme is as follows: two portions of conductor materials are respectively drawn by using a wire drawing machine, an extruder is used to cover the two conductor cores with insulation materials through an extrusion process, the cable wrapped with the first insulation layer is put into a roughening and slotting device, the roughening and slotting device first threads the surface of the first insulation layer of the cable, then uniformly punches small holes on the surface of the first insulation layer, roughens the surface of the first insulation layer, the extruder is used again to extrude outer insulation materials on the roughened surface of the first insulation layer, finally, the finished cable is wound on a winding drum, and is marked and packaged, the softening, slotting, roughening and cleaning processes are added between the extrusion process of the first insulation layer of the cable and the extrusion process of the second insulation layer of the cable, so that the second insulation layer is more firmly attached to the first insulation layer, and the risk of separation is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable manufacturing, in particular to a double-core double-layer cable manufacturing process and a production device thereof. BACKGROUND

[0002] The existing double-core double-layer cable manufacturing process includes multiple procedures such as conductor core processing, inner layer insulation layer extrusion, and outer layer insulation layer extrusion. In the traditional double-layer insulation layer extrusion process, the control precision of parameters such as temperature, pressure, and cooling rate is relatively high. The specific steps are as follows: using an extruder to extrude a first insulation layer on the outer wall of the double-conductor core, and then using another extruder to extrude a second layer of insulation layer on the smooth outer wall of the first insulation layer. During the extrusion process, if the parameters such as temperature, pressure, and cooling rate are not properly controlled, it may cause the first insulation layer and the second layer of insulation layer not to be fully combined, or the solidification process of the first insulation layer not to reach the expected value, affecting the surface performance, thereby reducing the adhesion between the first insulation layer and the second layer of insulation layer, and causing some problems:

[0003] 1. If the second layer of insulation does not adhere well, it may cause a significant decrease in electrical insulation performance, increase the risk of leakage current between conductors or between conductors and the external environment, and easily cause short circuit or electric shock risk;

[0004] 2. Poor adhesion may cause the first insulation layer and the second layer of insulation layer to separate under mechanical stress (such as stretching and bending), reducing the overall tensile strength and durability of the cable, and due to the lack of good adhesion, the second layer of insulation layer may gradually fall off due to friction or environmental changes (such as temperature and humidity) during use, thereby accelerating aging and failure;

[0005] 3. If there is a gap between the first insulation layer and the second layer of insulation layer, moisture or chemicals may penetrate into it, causing a decrease in insulation performance and increasing the corrosion risk of the cable;

[0006] 4. Poor adhesion may cause inconsistent interlayer thermal expansion when the temperature changes, further causing the separation of the first insulation layer and the second layer of insulation layer, affecting the stability of the cable;

[0007] 5. In the manufacturing process, if poor adhesion occurs, it may cause the product to be unqualified, increase the scrap rate, affect production efficiency and economic benefits, and due to the decrease in cable performance, frequent detection and maintenance may be required during subsequent use, increasing operation and maintenance costs.

[0008] Therefore, it is necessary to invent a double-core double-layer cable manufacturing process and a production device thereof. SUMMARY

[0009] In order to achieve the above object, the present application provides a double-core double-layer cable manufacturing process, comprising the following steps:

[0010] S1, selecting two suitable conductor materials, using a wire drawing machine to draw the two conductor materials respectively to make two conductor cores with the required diameter, and then using an annealing furnace to anneal the two conductor cores;

[0011] S2, simultaneously placing the two conductor cores into an extruder, using the extruder to coat the two conductor cores with insulation material through an extrusion process to form a first insulation layer, and then naturally cooling and solidifying;

[0012] S3, placing the cable wrapped with the first insulation layer into a roughening and grooving device, the roughening and grooving device blows hot air to heat and soften the surface of the first insulation layer of the cable, and simultaneously removes dust and impurities on the surface of the first insulation layer;

[0013] S4, the roughening and grooving device first threads the surface of the first insulation layer of the cable, and then punches uniform small holes on the surface of the first insulation layer to roughen the surface of the first insulation layer;

[0014] S5, the roughening and grooving device sprays water on the roughened surface of the first insulation layer to flush and clean the debris and impurities on the surface of the first insulation layer;

[0015] S6, using the extruder to extrude outer insulation material on the roughened surface of the first insulation layer to form a second insulation layer, and then naturally cooling and solidifying;

[0016] S7, using detection instruments to test the electrical performance, mechanical performance and environmental adaptability of the double-core double-layer cable, and finally winding the finished cable on a reel, and marking and packaging.

[0017] The present application further provides a production device used in the double-core double-layer cable manufacturing process, the roughening and grooving device comprises a hot air pipe and a cleaning pipe, the hot air pipe is fixedly installed on the upper end of one side of the support plate close to the longitudinal rotating seat, the cleaning pipe is fixedly installed on the upper end of one side of the support plate close to the transverse rotating seat, one end of the cleaning pipe away from the transverse rotating seat is fixedly connected with a roughening sleeve, and the roughening sleeve away from the cleaning pipe is connected with a grooving sleeve.

[0018] Preferably, the roughening and grooving device comprises a hot air pipe and a cleaning pipe, the hot air pipe is fixedly installed on the upper end of one side of the support plate close to the longitudinal rotating seat, the cleaning pipe is fixedly installed on the upper end of one side of the support plate close to the transverse rotating seat, one end of the cleaning pipe away from the transverse rotating seat is fixedly connected with a roughening sleeve, and the roughening sleeve away from the cleaning pipe is connected with a grooving sleeve.

[0019] Preferably, the upper feeding guide wheel is arranged between the longitudinal rotating seat and the hot air pipe, and the lower feeding guide wheel is arranged between the cleaning pipe and the transverse rotating seat, both of which are rotatably installed with connecting plates on both sides, the lower end of the connecting plate is fixedly connected with the base, the top of the end of the support plate away from the longitudinal rotating seat is fixedly installed with a hydraulic rod, and the output end of the end of the hydraulic rod away from the support plate is rotatably installed with a tension control guide wheel.

[0020] Preferably, the heating pipe is fixedly installed on the surface of the support plate below the hot air pipe, the air guide elbow pipe is fixedly connected with the end of the hot air pipe away from the upper feeding guide wheel, the air guide elbow pipe is bent downward and connected with the heating pipe, the inner wall of the end of the air guide elbow pipe connected with the hot air pipe is provided with an annular protrusion, the surface of the annular protrusion is provided with air holes, and the inner wall of the annular protrusion is fixedly connected with a lead-out pipe.

[0021] Preferably, the heating pipe is fixedly installed on the surface of the support plate below the hot air pipe, the air guide elbow pipe is fixedly connected with the end of the hot air pipe away from the upper feeding guide wheel, the air guide elbow pipe is bent downward and connected with the heating pipe, the inner wall of the end of the air guide elbow pipe connected with the hot air pipe is provided with an annular protrusion, the surface of the annular protrusion is provided with air holes, and the inner wall of the annular protrusion is fixedly connected with a lead-out pipe.

[0022] Preferably, the annular slot is arranged on the inner wall of the slotted sleeve, the top of the inner wall of the annular slot is provided with an opening, the annular slot is rotatably installed with a gear ring in the inner wall, the top surface of the slotted sleeve is fixedly installed with a gear motor, the output end of the gear motor is fixedly installed with a gear, and the gear and the bottom pass through the top opening of the annular slot and are meshingly connected with the gear ring.

[0023] Preferably, the annular slot is arranged on the inner wall of the slotted sleeve, the top of the inner wall of the annular slot is provided with an opening, the annular slot is rotatably installed with a gear ring in the inner wall, the top surface of the slotted sleeve is fixedly installed with a gear motor, the output end of the gear motor is fixedly installed with a gear, and the gear and the bottom pass through the top opening of the annular slot and are meshingly connected with the gear ring.

[0024] Preferably, the heating pipe is fixedly installed on the surface of the support plate below the hot air pipe, the air guide elbow pipe is fixedly connected with the end of the hot air pipe away from the upper feeding guide wheel, the air guide elbow pipe is bent downward and connected with the heating pipe, the inner wall of the end of the air guide elbow pipe connected with the hot air pipe is provided with an annular protrusion, the surface of the annular protrusion is provided with air holes, and the inner wall of the annular protrusion is fixedly connected with a lead-out pipe.

[0025] Preferably, the bottom surface of the inner wall of the cleaning pipe is arranged with a plurality of water draining holes, the bottom surface of the outer wall of the cleaning pipe is fixedly installed with a water collecting cabin, the upper end of the water collecting cabin covers all the water draining holes, the lower end of the water collecting cabin is sealed and extends downward to the top of the water tank, and one side of the lower end of the water collecting cabin is fixedly connected with a drain pipe.

[0026] The beneficial effects of the present application are: by adding the softening, grooving, roughening and cleaning processes between the cable first insulation layer extrusion process and the cable second insulation layer extrusion process, thread grooves are opened on the surface of the first insulation layer after extrusion and the surface of the first insulation layer is roughened, to achieve the following multiple effects:

[0027] 1. The grooving process increases the surface area of the first insulation layer, thereby providing more contact surface, which can enhance the physical contact between the second insulation layer and the first insulation layer and promote adhesion;

[0028] 2. The roughening process forms some micro grooves and irregular shapes on the surface of the first insulation layer, which can improve the mechanical interlocking force between the second insulation layer and the first insulation layer, so that the second insulation layer is more firmly attached to the first insulation layer, reducing the risk of separation;

[0029] 3. After the first insulation layer is grooved, the second layer material can better fill the grooves when extruded, thereby forming a uniform coating and further improving the adhesion strength;

[0030] 4. The adhesion between some insulation layers is related to chemical interaction, after the first insulation layer is grooved, more chemical active sites can be exposed, thereby promoting the chemical adhesion between the second insulation layer and the first insulation layer;

[0031] 5. When the insulation material is affected by temperature change, grooving can help the stress between the second insulation layer and the first insulation layer to be more evenly distributed, thereby reducing the risk of peeling due to thermal expansion difference. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A double-core double-layer cable manufacturing process flow chart is provided for the present application;

[0033] Figure 2 A right side view of the production device of the double-core double-layer cable manufacturing process provided for the present application;

[0034] Figure 3 A left side view of the production device of the double-core double-layer cable manufacturing process provided for the present application;

[0035] Figure 4 A tension control guide wheel structure schematic diagram of the production device of the double-core double-layer cable manufacturing process provided for the present application;

[0036] Figure 5The right side structure cross-sectional view of the production device of the double-core double-layer cable manufacturing process provided by the present application is shown in the figure;

[0037] Figure 6 The exploded view of the blast casing of the production device of the double-core double-layer cable manufacturing process provided by the present application is shown in the figure;

[0038] Figure 7 The left side structure cross-sectional view of the production device of the double-core double-layer cable manufacturing process provided by the present application is shown in the figure;

[0039] Figure 8 The internal structure schematic diagram of the slotted sleeve of the production device of the double-core double-layer cable manufacturing process provided by the present application is shown in the figure;

[0040] Figure 9 The exploded view of the gear ring of the production device of the double-core double-layer cable manufacturing process provided by the present application is shown in the figure;

[0041] Figure 10 The internal structure schematic diagram of the roughening sleeve of the production device of the double-core double-layer cable manufacturing process provided by the present application is shown in the figure;

[0042] Figure 11 The enlarged view A of the Figure 5 provided by the present application is shown in the figure;

[0043] Figure 12 The enlarged view B of the Figure 7 provided by the present application is shown in the figure.

[0044] In the figure: base 11, support plate 12, longitudinal rotating seat 13, transverse rotating seat 14, feeding wire roller 15, collecting wire roller 16, feeding guide wheel 17, discharging guide wheel 18, tension control guide wheel 19, hydraulic rod 20, hot air pipe 21, air guide elbow 22, heating pipe 23, guide-out pipe 24, blast casing 25, filter screen 26, impeller 27, impeller motor 28, roughening roller 29, roller support 30, slotted sleeve 31, roughening sleeve 32, sleeve support 33, gear ring 34, gear wheel 35, gear motor 36, inner tube support 37, slotted inner tube 38, knife slot 39, electric heating wire 40, cleaning pipe 41, water pipe 42, pressurized spray head 43, draining hole 44, water collecting cabin 45, drain pipe 46, water tank 47. DETAILED DESCRIPTION

[0045] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0046] In Example 1, as shown in the figure, the double-core double-layer cable manufacturing process in the first aspect of the present application includes the following steps: Figure 1

[0047] ​S1, select two suitable conductor materials, use the wire drawing machine to draw the two conductor materials respectively, make two conductor cores of the required diameter, then use the annealing furnace to anneal the two conductor cores;

[0048] S2, put the two conductor cores into the extruder at the same time, use the extruder to cover the two conductor cores with insulation material through the extrusion process, form the first insulation layer, then natural cooling and solidification;

[0049] S3, put the cable wrapped with the first insulation layer into the roughening and grooving device, the roughening and grooving device blows hot air to heat and soften the surface of the first insulation layer of the cable, and removes the dust and impurities on the surface of the first insulation layer at the same time;

[0050] S4, the roughening and grooving device first threads the surface of the first insulation layer of the cable, then punches uniform small holes on the surface of the first insulation layer, and roughens the surface of the first insulation layer;

[0051] S5, the roughening and grooving device sprays water on the roughened surface of the first insulation layer to wash away the debris and impurities on the surface of the first insulation layer;

[0052] S6, use the extruder again to extrude the outer insulation material on the roughened surface of the first insulation layer to form the second insulation layer, then natural cooling and solidification;

[0053] S7, use the detection instrument to test the electrical performance, mechanical performance and environmental adaptability of the double-core double-layer cable, finally wind the finished cable on the reel, mark and package.

[0054] In the above embodiments, it should be noted that by adding steps three (softening), four (grooving and roughening), and five (cleaning) between steps two and six using a roughening and grooving device, threaded grooves are formed on the surface of the first insulating layer after extrusion, and the surface of the first insulating layer is roughened. This achieves the following: 1. Increasing the surface area of ​​the first insulating layer, providing more contact surface, enhancing the physical contact between the second insulating layer and the first insulating layer, and promoting adhesion; 2. Forming some micro-grooves and irregular shapes on the surface of the first insulating layer to improve the mechanical interlocking force between the second insulating layer and the first insulating layer, so that the second insulating layer is more firmly attached to the first insulating layer. 1. On the first insulating layer, the risk of detachment is reduced; 2. After grooving the surface of the first insulating layer, the second layer material can better fill these grooves during extrusion, thereby forming a uniform coating and further improving adhesion strength; 3. Since the adhesion between some insulating layer materials is related to chemical interactions, grooving the surface of the first insulating layer can expose more chemically active sites, thereby promoting chemical adhesion between the second insulating layer and the first insulating layer; 4. When the insulating material is affected by temperature changes, grooving can help the stress distribution between the second insulating layer and the first insulating layer to be more uniform, thereby reducing the risk of peeling due to differences in thermal expansion.

[0055] Example 2, as Figure 2 - Figure 4 As shown, the present invention also includes a production apparatus for manufacturing a double-core double-layer cable. The roughening and grooving device includes a base 11, a support plate 12 fixedly installed at the center of the top surface of the base 11, a longitudinal rotating seat 13 and a transverse rotating seat 14 fixedly installed on one side of the top surface of the base 11, the longitudinal rotating seat 13 and the transverse rotating seat 14 respectively disposed on both sides of one end of the support plate 12, a feeding roller 15 rotatably mounted on the longitudinal rotating seat 13, and a receiving roller 16 rotatably mounted on the transverse rotating seat 14. Both the feeding roller 15 and the receiving roller 16 are used for winding the cable. The roughening and grooving device includes a hot air pipe 21 and a cleaning pipe 41. The hot air pipe 21 is fixedly installed on the upper end of the support plate 12 near the longitudinal rotating seat 13, and the cleaning pipe 41... 41 is fixedly installed on the upper end of the support plate 12 near the transverse rotating seat 14. The end of the cleaning pipe 41 away from the transverse rotating seat 14 is fixedly connected to the roughening sleeve 32. The side of the roughening sleeve 32 away from the cleaning pipe 41 is connected to the slotted sleeve 31. A feeding guide wheel 17 is provided between the longitudinal rotating seat 13 and the hot air pipe 21. A discharging guide wheel 18 is provided between the cleaning pipe 41 and the transverse rotating seat 14. Connecting plates are rotatably installed on both sides of the feeding guide wheel 17 and the discharging guide wheel 18. The lower end of the connecting plate is fixedly connected to the base 11. A hydraulic rod 20 is fixedly installed on the top of the end of the support plate 12 away from the longitudinal rotating seat 13. A tension control guide wheel 19 is rotatably installed on the output end of the hydraulic rod 20 away from the support plate 12.

[0056] In the above embodiment, it needs to be explained that the feeding line roller 15 and the collecting line roller 16 are arranged in a detachable structure, which is convenient for transportation. The outer wall of the feeding guide wheel 17, the discharging guide wheel 18 and the tension control guide wheel 19 is provided with a groove capable of embedding the cable. The surface of the feeding line roller 15 is wound with the cable after the S2 is extruded and wrapped with the first insulation layer. When the roughening and grooving device is used, the worker needs to install the feeding line roller 15 on the longitudinal rotating seat 13 and install the collecting line roller 16 on the transverse rotating seat 14. Then, the cable on the surface of the feeding line roller 15 is pulled out at one end, passes through the top groove of the feeding guide wheel 17, and then passes through the hot air pipe 21, the surface groove of the tension control guide wheel 19, the grooving sleeve 31, the roughening sleeve 32 and the cleaning pipe 41 in sequence. Finally, it passes through the top groove of the discharging guide wheel 18 and is fixed on the collecting line roller 16, so as to achieve the effect of installing the cable to be grooved into the roughening and grooving device. The rotating motor is installed on the feeding guide wheel 17, the discharging guide wheel 18, the tension control guide wheel 19, the longitudinal rotating seat 13 and the transverse rotating seat 14. The rotating motor drives the feeding guide wheel 17, the discharging guide wheel 18 and the tension control guide wheel 19 to rotate, and at the same time drives the feeding line roller 15 on the longitudinal rotating seat 13 and the collecting line roller 16 on the transverse rotating seat 14 to rotate, so as to achieve the effect that the cable is driven in each component of the roughening and grooving device. By starting the hydraulic rod 20 to push or retract the tension control guide wheel 19, the tension of the cable in the roughening and grooving device can be adjusted.

[0057] As shown in Embodiment 3, Figure 2 、 Figure 5 、 Figure 6 、 Figure 11 The production device of the double-core double-layer cable manufacturing process includes all the contents of Embodiment 2. In addition, the surface of the support plate 12 below the hot air pipe 21 is fixedly installed with a heating pipe 23. The end of the hot air pipe 21 away from the feeding guide wheel 17 is fixedly connected with a wind guide elbow pipe 22. The wind guide elbow pipe 22 is bent downward and connected with the heating pipe 23. The inner wall of the end of the wind guide elbow pipe 22 connected with the hot air pipe 21 is provided with an annular protrusion. The surface of the annular protrusion is provided with air holes. The inner wall of the annular protrusion is fixedly connected with a lead-out pipe 24. The end of the lead-out pipe 24 away from the annular protrusion penetrates the wind guide elbow pipe 22 horizontally. The heating pipe 23 is internally installed with an electric heating wire 40. The end of the heating pipe 23 away from the wind guide elbow pipe 22 is fixedly installed with a blower housing 25. The blower housing 25 is rotatably installed with an impeller 27. The blower housing 25 is fixedly installed with a filter screen 26 on one side. The blower housing 25 is fixedly installed with an impeller motor 28 on the other side. The output end of the impeller motor 28 penetrates the blower housing 25 and is fixedly connected with the impeller 27.

[0058] In the above embodiment, it should be noted that when the cable passes through the hot air pipe 21, the impeller 27 is driven to rotate by starting the impeller motor 28, external air is sucked into the air blast casing 25 through the filter screen 26 and is sent into the heating pipe 23, the heating wire 40 in the heating pipe 23 is started to heat the air, the heated air passes through the annular protruding surface pores along the air guide elbow pipe 22 and is blown into the hot air pipe 21, so as to blow away the dust and impurities on the surface of the first insulation layer of the cable in the hot air pipe 21, and to soften the surface of the first insulation layer; the cable after passing through the hot air pipe 21 passes into the lead-out pipe 24 and is led out from the other end of the lead-out pipe 24 to enter the tension control guide pulley 19.

[0059] Embodiment 4, as shown in Figure 3 , Figure 4 , Figure 7 - Figure 10 The production device of the double-core double-layer cable manufacturing process includes all the contents of embodiment 3, in addition, the inner wall of the slotted sleeve 31 is provided with an annular slot, the top of the inner wall of the annular slot is provided with an opening, the annular slot is rotatably installed with a gear ring 34, the slotted sleeve 31 is fixedly installed with a gear motor 36 on the top surface, the output end of the gear motor 36 is fixedly installed with a gear 35, the gear 35 is connected with the gear ring 34 through the annular slot top opening, the gear ring 34 is provided with a slotted inner pipe 38 in the center, the inner pipe support 37 is fixedly installed on the outer wall of the slotted inner pipe 38, the inner pipe support 37 is fixedly connected with the inner wall of the gear ring 34, the slotted inner pipe 38 is embeddedly installed with a knife slot 39 around the inner wall, the tail end of the knife slot 39 penetrates the slotted inner pipe 38 to the outer wall of the slotted inner pipe 38, the roughening sleeve 32 is fixedly installed with a roller support 30 around the inner wall, the roughening roller 29 is rotatably installed on the end of the roller support 30 away from the inner wall of the roughening sleeve 32, the roughening roller 29 is provided with a sharp structure on the surface, the roughening roller 29 can be attached to the surface of the cable, the slotted sleeve 31 and the roughening sleeve 32 are fixedly installed with a sleeve support 33 on the bottom surface, and the sleeve support 33 is fixedly connected with the support plate 12.

[0060] In the above embodiment, it should be noted that the knife slot 39 is made of sharp cutting metal, the cable passes into the slotted sleeve 31 and passes through the slotted inner pipe 38, the gear 35 is driven to rotate by starting the gear motor 36, the gear ring 34 in the slotted sleeve 31 is driven to rotate by the gear 35, the inner pipe support 37 is driven to slowly rotate the slotted inner pipe 38 by the gear ring 34, so as to cut the spiral slot on the surface of the first insulation layer of the cable by the knife slot 39; the cable passing out of the slotted inner pipe 38 will pass through the roughening rollers 29 in the roughening sleeve 32 and drive the roughening rollers 29 to roll along the surface of the first insulation layer of the cable, the roughening rollers 29 pierce holes on the surface of the first insulation layer, so as to roughen the surface of the first insulation layer.

[0061] Embodiment 5, as shown in Figure 3 , Figure 7 and Figure 12As shown, the production device of the double-core double-layer cable manufacturing process includes the entire content of Embodiment 4, in addition, the water tank 47 is fixedly installed on the top surface of the base 11 below the cleaning pipe 41, the water pipes 42 are fixedly installed on the inner wall top surface and both sides of the cleaning pipe 41, one end of the water pipe 42 close to the roughing sleeve 32 is sealed, the other end of the water pipe 42 away from the roughing sleeve 32 extends out of the cleaning pipe 41 and is connected to the water tank 47, a plurality of pressurized nozzles 43 are arranged and installed on the surface of the cleaning pipe 41 located on the inner wall of the cleaning pipe 41, the spray nozzles 43 are arranged to spray towards the center of the cleaning pipe 41, a plurality of drainage holes 44 are arranged on the bottom surface of the inner wall of the cleaning pipe 41, the water collecting cabin 45 is fixedly installed on the outer wall bottom surface of the cleaning pipe 41, the water collecting cabin 45 covers all the drainage holes 44 on the upper end, the lower end of the water collecting cabin 45 is sealed and extends downward to the top of the water tank 47, and the water collecting cabin 45 is fixedly connected with the drain pipe 46 on one side of the lower end.

[0062] In the above embodiments, it should be noted that when the cable passes through the cleaning pipe 41, water is pumped from the water tank 47 through the water pipe 42 and sprayed from the pressurized nozzles 43 to achieve the effect of washing the surface of the first insulation layer of the cable and cleaning the debris; the sewage and debris generated by washing the surface of the first insulation layer of the cable will enter the water collecting cabin 45 from the drainage holes 44, and finally flow into the drain pipe 46, which is discharged after separation treatment.

[0063] The production device of the double-core double-layer cable manufacturing process in the application is used as follows: the feeding line roller 15 is installed on the longitudinal rotating seat 13, and the receiving line roller 16 is installed on the transverse rotating seat 14, then one end of the cable on the surface of the feeding line roller 15 is pulled out, passes through the top groove of the feeding guide wheel 17, then passes through the hot air pipe 21, the slotted surface of the tension control guide wheel 19, the slotted sleeve 31, the roughening sleeve 32 and the cleaning pipe 41 in sequence, and finally passes through the top groove of the discharging guide wheel 18 and is fixed on the receiving line roller 16, the rotating motor is started to drive the feeding guide wheel 17, the discharging guide wheel 18 and the tension control guide wheel 19 to rotate, at the same time, the feeding line roller 15 on the longitudinal rotating seat 13 and the receiving line roller 16 on the transverse rotating seat 14 are driven to rotate, so that the cable is driven to pass through the hot air pipe 21, the impeller motor 28 is started to drive the impeller 27 to rotate, external air is sucked into the air blowing shell 25 through the filter screen 26 and is sent into the heating pipe 23, the electric heating wire 40 in the heating pipe 23 is started to heat the air, the heated air passes through the air hole on the surface of the annular protrusion along the air guide elbow pipe 22 and is blown into the hot air pipe 21, so as to blow away the dust and impurities on the surface of the first insulation layer of the cable in the hot air pipe 21 and soften the surface of the first insulation layer, the cable after passing through the hot air pipe 21 passes into the lead-out pipe 24 and is pulled out from the other end of the lead-out pipe 24 to enter the tension control guide wheel 19, then is driven to enter the slotted sleeve 31, the gear motor 36 is started to drive the gear 35 to rotate, the gear 35 drives the gear ring 34 in the slotted sleeve 31 to rotate, the gear ring 34 drives the inner pipe support 37 to drive the slotted inner pipe 38 to rotate slowly, so that the knife slot 39 cuts out a spiral slot on the surface of the first insulation layer of the cable, the cable passing out of the slotted inner pipe 38 passes through the roughening rollers 29 in the roughening sleeve 32, drives the roughening rollers 29 to roll along the surface of the first insulation layer of the cable and roughen the surface of the first insulation layer by punching holes on the surface of the first insulation layer, then the cable is driven to pass through the cleaning pipe 41, water is pumped from the water tank 47 through the water pipe 42 and is sprayed from the pressurized nozzle 43, so as to flush and clean the surface of the first insulation layer of the cable, finally, the cable passes through the top of the discharging guide wheel 18 and is wound on the receiving line roller 16.

[0064] The above description is only the preferred embodiment of the application, any skilled person in the art can modify the application by using the technical solutions described above or modify it into equivalent technical solutions. Therefore, any simple modification or equivalent replacement according to the technical solutions of the application is within the scope of protection of the application.

Claims

1. A process for manufacturing a dual core dual layer cable, characterized in that: It comprises the following steps: S1, select two suitable conductor materials, use the wire drawing machine to draw the two conductor materials respectively, make two conductor cores of the required diameter, then use the annealing furnace to anneal the two conductor cores; S2, put the two conductor cores into the extruder at the same time, use the extruder to cover the insulation material on the two conductor cores through the extrusion process, form the first insulation layer, then natural cooling and solidification; S3, put the cable wrapped with the first insulation layer into the roughening and grooving device, the roughening and grooving device blows hot air to heat and soften the surface of the first insulation layer of the cable, and removes the dust and impurities on the surface of the first insulation layer at the same time; S4, the roughening and grooving device first threads the surface of the first insulation layer of the cable, then punches uniform small holes on the surface of the first insulation layer, and roughens the surface of the first insulation layer; S5, the roughening and grooving device sprays water on the roughened surface of the first insulation layer to wash away the debris and impurities on the surface of the first insulation layer; S6, use the extruder again to extrude the outer insulation material on the roughened surface of the first insulation layer to form the second insulation layer, then natural cooling and solidification; S7, use the detection instrument to test the electrical performance, mechanical performance and environmental adaptability of the double-core double-layer cable, finally wind the finished cable on the reel, and mark and package; The roughening and grooving device comprises a base (11), a support plate (12) is fixedly installed on the top surface of the base (11), a longitudinal rotating seat (13) and a transverse rotating seat (14) are fixedly installed on one side of the top surface of the base (11), the longitudinal rotating seat (13) and the transverse rotating seat (14) are respectively arranged on the two sides of one end of the support plate (12), an upper feeding roller (15) is rotatably installed on the longitudinal rotating seat (13), a receiving roller (16) is rotatably installed on the transverse rotating seat (14), and the upper feeding roller (15) and the receiving roller (16) are used for winding the cable; The roughening and grooving device comprises a hot air pipe (21) and a cleaning pipe (41), the hot air pipe (21) is fixedly installed on one side of the upper end of the support plate (12) close to the longitudinal rotating seat (13), the cleaning pipe (41) is fixedly installed on one side of the upper end of the support plate (12) close to the transverse rotating seat (14), one end of the cleaning pipe (41) away from the transverse rotating seat (14) is fixedly connected with a roughening sleeve (32), and the roughening sleeve (32) is connected with a grooving sleeve (31) on the side away from the cleaning pipe (41).

2. The production apparatus of a dual-core dual-layer cable manufacturing process according to claim 1, characterized by: An upper feeding guide roller (17) is arranged between the longitudinal rotating seat (13) and the hot air pipe (21), a lower discharging guide roller (18) is arranged between the cleaning pipe (41) and the transverse rotating seat (14), connecting plates are rotatably installed on the two sides of the upper feeding guide roller (17) and the lower discharging guide roller (18), the lower ends of the connecting plates are fixedly connected with the base (11), a hydraulic rod (20) is fixedly installed on the top of the end of the support plate (12) away from the longitudinal rotating seat (13), and a tension control guide roller (19) is rotatably installed on the output end of one end of the hydraulic rod (20) away from the support plate (12).

3. The production apparatus of the dual-core dual-layer cable manufacturing process according to claim 2, characterized by: The surface of the support plate (12) below the hot air pipe (21) is fixedly provided with a heating pipe (23), one end of the hot air pipe (21) away from the feeding guide roller (17) is fixedly connected with a wind guide elbow pipe (22), the wind guide elbow pipe (22) is bent downward and connected with the heating pipe (23), the inner wall of the one end of the wind guide elbow pipe (22) connected with the hot air pipe (21) is provided with an annular protrusion, the surface of the annular protrusion is provided with air holes, the inner wall of the annular protrusion is fixedly connected with a lead-out pipe (24), one end of the lead-out pipe (24) away from the annular protrusion penetrates the wind guide elbow pipe (22) horizontally.

4. The production apparatus of the dual-core dual-layer cable manufacturing process according to claim 3, characterized by: The heating pipe (23) is provided with an electric heating wire (40), one end of the heating pipe (23) away from the wind guide elbow pipe (22) is fixedly provided with a blower shell (25), the blower shell (25) is rotatably provided with an impeller (27), one side of the blower shell (25) is fixedly provided with a filter screen (26), the other side of the blower shell (25) is fixedly provided with an impeller motor (28), the output end of the impeller motor (28) penetrates the blower shell (25) and is fixedly connected with the impeller (27).

5. The production apparatus of the dual core dual layer cable manufacturing process according to claim 2, characterized by: The inner wall of the slotted sleeve pipe (31) is provided with an annular slot, the top of the inner wall of the annular slot is provided with an opening, the inner wall of the annular slot is rotatably provided with a gear ring (34), the top surface of the slotted sleeve pipe (31) is fixedly provided with a gear motor (36), the output end of the gear motor (36) is fixedly provided with a gear (35), the bottom of the gear (35) penetrates the top opening of the annular slot and is meshingly connected with the gear ring (34), the center of the gear ring (34) is provided with a slotted inner pipe (38), the outer wall of the slotted inner pipe (38) is fixedly provided with an inner pipe support (37), the inner pipe support (37) is fixedly connected with the inner wall of the gear ring (34), the inner wall of the slotted inner pipe (38) is embeddedly provided with a knife slot (39) around, the tail end of the knife slot (39) penetrates the slotted inner pipe (38) to the outer wall of the slotted inner pipe (38).

6. The production apparatus of the dual-core dual-layer cable manufacturing process according to claim 5, characterized by: The inner wall of the roughening sleeve pipe (32) is fixedly provided with a roller support (30) around, one end of the roller support (30) away from the inner wall of the roughening sleeve pipe (32) is rotatably provided with a roughening roller (29), the surface of the roughening roller (29) is provided with a thorn structure, the roughening roller (29) can be attached to the surface of the cable, the bottom surface of the slotted sleeve pipe (31) and the roughening sleeve pipe (32) is fixedly provided with a sleeve pipe support (33), the sleeve pipe support (33) is fixedly connected with the support plate (12).

7. The production apparatus of the dual core dual layer cable manufacturing process according to claim 2, characterized by: The top surface of the base (11) below the cleaning pipe (41) is fixedly provided with a water tank (47), the inner wall top surface and both sides of the cleaning pipe (41) are fixedly provided with a water pipe (42), one end of the water pipe (42) close to the roughening sleeve pipe (32) is sealed, one end of the water pipe (42) away from the roughening sleeve pipe (32) extends out of the cleaning pipe (41) and is connected with the water tank (47), a plurality of pressurized nozzles (43) are arranged on the surface of the cleaning pipe (41) located on the inner wall of the cleaning pipe (41), the nozzle of the pressurized nozzle (43) faces the center of the cleaning pipe (41).

8. The production apparatus of the dual-core dual-layer cable manufacturing process according to claim 7, characterized by: The inner wall bottom surface of the cleaning pipe (41) is arranged with a plurality of draining holes (44), the outer wall bottom surface of the cleaning pipe (41) is fixedly installed with a water collecting cabin (45), the upper end of the water collecting cabin (45) covers all the draining holes (44), the lower end of the water collecting cabin (45) is sealed and extends downward to the top of a water tank (47), and one side of the lower end of the water collecting cabin (45) is fixedly connected with a drain pipe (46).

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