Double-core double-layer cable manufacturing process and production device thereof

Abstract

The invention relates to the technical field of cable manufacturing, in particular to a double-core double-layer cable manufacturing process and a double-core double-layer cable production device, and adopts the technical scheme that two conductor materials are respectively drawn by using a drawing machine, and an insulating material is coated outside two conductor wire cores by using an extruding machine through an extruding process; putting the cable wrapped with the first insulating layer into a coarsening and grooving device, forming a threaded groove in the surface of the first insulating layer of the cable by the coarsening and grooving device, then pricking uniform small holes in the surface of the first insulating layer, coarsening the surface of the first insulating layer, and extruding an outer insulating material on the coarsened surface of the first insulating layer by using the extruder again, and finally, winding the finished cable on a reel, and carrying out marking and packaging. The softening, slotting, coarsening and cleaning processes are added between the cable first insulation layer extrusion process and the cable second insulation layer extrusion process, 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 invention relates to the technical field of cable manufacturing, and in particular to a double-core double-layer cable manufacturing process and a production device thereof. Background Art

[0002] The existing manufacturing process of double-core double-layer cables includes multiple processes such as conductor core processing, inner insulation layer extrusion, and outer insulation layer extrusion. In the traditional double-layer insulation layer extrusion process, the control accuracy of parameters such as temperature, pressure, and cooling rate is relatively high. The specific steps are: use an extruder to extrude the first insulation layer on the outer wall of the double-conductor core wire, and then use another extruder to extrude the second insulation layer on the smooth outer wall of the first insulation layer. During the extrusion process, if the temperature, pressure, cooling rate and other parameters are not properly controlled, it is likely that the first insulation layer and the second insulation layer cannot be fully combined, or the curing process of the first insulation layer does not meet expectations, affecting its surface properties, thereby reducing the adhesion between the first insulation layer and the second insulation layer, which leads to some problems:

[0003] 1. If the second layer of insulation fails to adhere well, the electrical insulation performance may be greatly reduced, increasing the risk of leakage current between conductors or between conductors and the external environment, and easily causing the risk of short circuit or electric shock;

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

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

[0006] 4. When the temperature changes, poor adhesion may lead to inconsistent thermal expansion between layers, further leading to the separation of the first and second insulation layers, affecting the stability of the cable;

[0007] 5. During the manufacturing process, if poor adhesion occurs, it may lead to unqualified products, increase the scrap rate, affect production efficiency and economic benefits, and due to the degradation of cable performance, frequent inspection and maintenance may be required during subsequent use, increasing operating and maintenance costs.

[0008] Therefore, it is necessary to invent a double-core double-layer cable manufacturing process and a production device. Summary of the invention

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

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

[0011] S2, putting the two conductor cores into an extruder at the same time, using the extruder to coat the insulating material on the two conductor cores through an extrusion process to form a first insulating layer, and then naturally cooling and curing;

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

[0013] S4, the roughening and grooving device firstly makes a thread groove on the surface of the first insulating layer of the cable, and then pokes uniform small holes on the surface of the first insulating layer to roughen the surface of the first insulating layer;

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

[0015] S6, using the extruder again to extrude the outer layer of insulating material on the roughened surface of the first insulating layer to form a second insulating layer, followed by natural cooling and solidification;

[0016] S7. Use testing instruments to conduct various tests on the electrical properties, mechanical properties and environmental adaptability of the double-core double-layer cable. Finally, wind the finished cable on a reel for labeling and packaging.

[0017] On the other hand, the present invention provides a production device used in the double-core double-layer cable manufacturing process, the roughening and grooving device includes a hot air pipe and a cleaning pipe, the hot air pipe is fixedly installed on the upper end of the support plate on one side close to the longitudinal rotation seat, the cleaning pipe is fixedly installed on the upper end of the support plate on one side close to the transverse rotation seat, the end of the cleaning pipe away from the transverse rotation seat is fixedly connected to the roughening sleeve, and the side of the roughening sleeve away from the cleaning pipe is connected to the grooving sleeve.

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

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

[0020] Preferably, a heating pipe is fixedly installed on the surface of the bracket plate below the hot air pipe, and the end of the hot air pipe away from the loading guide wheel is fixedly connected to the air guide bend pipe, the air guide bend pipe bends downward and is connected to the heating pipe, and an annular protrusion is provided on the inner wall of the end of the air guide bend pipe connected to the hot air pipe, and air holes are provided on the surface of the annular protrusion, and the inner wall of the annular protrusion is fixedly connected to the outlet pipe, and the end of the outlet pipe away from the annular protrusion horizontally passes through the air guide bend pipe.

[0021] Preferably, an electric heating wire is installed in the heating tube, and a blower housing is fixedly installed at one end of the heating tube away from the air guide bend pipe, an impeller is rotatably installed in the blower housing, a filter is fixedly installed on one side of the blower housing, and an impeller motor is fixedly installed on the other side of the blower housing, and the output end of the impeller motor passes through the blower housing and is fixedly connected to the impeller.

[0022] Preferably, the inner wall of the slotted sleeve is provided with an annular groove, the top of the annular groove inner wall is provided with an opening, a gear ring is rotatably installed in the annular groove, a gear motor is fixedly installed on the top surface of the slotted sleeve, a gear is fixedly installed on the output end of the gear motor, the gear and the bottom pass through the top opening of the annular groove and are meshed and connected with the gear ring, a slotted inner tube is provided in the center of the gear ring, an inner tube bracket is fixedly installed on the outer wall of the slotted inner tube, the inner tube bracket is fixedly connected to the inner wall of the gear ring, knife grooves are embedded and installed around the inner wall of the slotted inner tube, and the tail end of the knife groove passes through the slotted inner tube to the outer wall of the slotted inner tube.

[0023] Preferably, roller brackets are fixedly installed around the inner wall of the roughening sleeve, a roughening roller is rotatably installed on one end of the roller bracket away from the inner wall of the roughening sleeve, a spike structure is provided on the surface of the roughening roller, the roughening roller can fit the cable surface, and sleeve brackets are fixedly installed on the slotted sleeve and the bottom surface of the roughening sleeve, and the sleeve bracket is fixedly connected to the bracket plate.

[0024] Preferably, a water tank is fixedly installed on the top surface of the base below the cleaning pipe, and water pipes are fixedly installed on the top surface and both sides of the inner wall of the cleaning pipe. The end of the water pipe close to the roughening sleeve is sealed, and the end of the water pipe away from the roughening sleeve extends out of the cleaning pipe and is connected to the water tank. A plurality of pressurized nozzles are arranged and installed on the surface of the cleaning pipe located on the inner wall of the cleaning pipe, and the nozzles of the pressurized nozzles are facing the center of the cleaning pipe.

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

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

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

[0028] 2. The roughening process forms some micro grooves and irregular shapes on the surface of the first insulating layer. This structure can improve the mechanical bite force between the second insulating layer and the first insulating layer, making the second insulating layer more firmly attached to the first insulating layer and reducing the risk of detachment;

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

[0030] 4. The adhesion between some insulating layer materials is related to chemical interactions. After the grooves are formed on the surface of the first insulating layer, more chemically active sites can be exposed, thereby promoting the chemical adhesion between the second insulating layer and the first insulating layer.

[0031] 5. When the insulating material is affected by temperature changes, the grooves can help to distribute the stress between the second insulating layer and the first insulating layer more evenly, thereby reducing the risk of peeling due to thermal expansion differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A process flow chart of manufacturing a double-core double-layer cable provided by the present invention;

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

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

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

[0036] Figure 5A right side structural sectional view of a production device for a double-core double-layer cable manufacturing process provided by the present invention;

[0037] Figure 6 An exploded view of the blast housing of a production device for the double-core double-layer cable manufacturing process provided by the present invention;

[0038] Figure 7 A left side structural sectional view of a production device for a double-core double-layer cable manufacturing process provided by the present invention;

[0039] Figure 8 A schematic diagram of the internal structure of a slotted casing of a production device of a double-core double-layer cable manufacturing process provided by the present invention;

[0040] Fig. 9 An exploded diagram of a gear ring of a production device for a double-core double-layer cable manufacturing process provided by the present invention;

[0041] Fig.10 A schematic diagram of the internal structure of the roughened casing of a production device of a double-core double-layer cable manufacturing process provided by the present invention;

[0042] Fig.11 The present invention provides Figure 5 A magnified image of

[0043] Fig.12 The present invention provides Figure 7 Enlarged view of B.

[0044] In the figure: base 11, bracket plate 12, longitudinal swivel seat 13, transverse swivel seat 14, feeding line roller 15, receiving line roller 16, feeding guide wheel 17, unloading guide wheel 18, tension control guide wheel 19, hydraulic rod 20, hot air pipe 21, air guide elbow 22, heating pipe 23, outlet pipe 24, blast housing 25, filter screen 26, impeller 27, impeller motor 28, roughening roller 29, roller bracket 30, slotted sleeve 31, roughening sleeve 32, sleeve bracket 33, gear ring 34, gear 35, gear motor 36, inner tube bracket 37, slotted inner tube 38, knife groove 39, heating wire 40, cleaning pipe 41, water pipe 42, pressurized nozzle 43, drain hole 44, water collecting chamber 45, drain pipe 46, water tank 47. DETAILED DESCRIPTION

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

[0046] Embodiment 1, as Figure 1 As shown, the manufacturing process of the double-core double-layer cable in the embodiment of the first aspect of the present invention comprises the following steps:

[0047] S1. Select two suitable conductor materials, use a wire drawing machine to draw the two conductor materials respectively to make two conductor cores with required diameters, and then use an annealing furnace to anneal the two conductor cores;

[0048] S2, putting the two conductor cores into an extruder at the same time, using the extruder to coat the insulating material on the two conductor cores through an extrusion process to form a first insulating layer, and then naturally cooling and curing;

[0049] S3, placing the cable wrapped with the first insulating layer into a roughening and grooving device, which blows hot air to heat and soften the surface of the first insulating layer of the cable, while removing dust and impurities on the surface of the first insulating layer;

[0050] S4, the roughening and grooving device firstly makes a thread groove on the surface of the first insulating layer of the cable, and then pokes uniform small holes on the surface of the first insulating layer to roughen the surface of the first insulating layer;

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

[0052] S6, using the extruder again to extrude the outer layer of insulating material on the roughened surface of the first insulating layer to form a second insulating layer, followed by natural cooling and solidification;

[0053] S7. Use testing instruments to conduct various tests on the electrical properties, mechanical properties and environmental adaptability of the double-core double-layer cable. Finally, wind the finished cable on a reel for labeling and packaging.

[0054] In the above embodiment, it should be noted that, by adding step 3 (softening), step 4 (grooving, roughening), and step 5 (cleaning) between step 2 and step 6 through the roughening and grooving device, a thread groove is opened on the surface of the first insulating layer after extrusion and the surface of the first insulating layer is roughened, so as to achieve the following: 1. The surface area of ​​the first insulating layer is increased, more contact surfaces are provided, and the physical contact between the second insulating layer and the first insulating layer is enhanced and the adhesion effect is promoted; 2. Some micro grooves and irregular shapes are formed on the surface of the first insulating layer to improve the mechanical bite 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. After the surface of the first insulating layer is grooved, the second layer of material can better fill these grooves during extrusion to form a uniform coating, further improving the adhesion strength; 2. After the surface of the first insulating layer is grooved, more chemically active sites can be exposed to promote chemical adhesion between the second insulating layer and the first insulating layer; 3. After the surface of the first insulating layer is grooved, the second layer of material can better fill these grooves during extrusion to form a uniform coating, further improving the adhesion strength; 4. Since the adhesion between some insulating layer materials is related to chemical interactions, after the surface of the first insulating layer is grooved, more chemically active sites can be exposed to promote chemical adhesion between the second insulating layer and the first insulating layer; 5. When the insulating material is affected by temperature changes, the grooves can help to make the stress distribution between the second insulating layer and the first insulating layer more uniform, thereby reducing the risk of peeling due to differences in thermal expansion.

[0055] Embodiment 2, as Figure 2 - Figure 4 As shown, the present invention also includes a production device for a double-core double-layer cable manufacturing process, the roughening and grooving device includes a base 11, a bracket plate 12 is fixedly installed at the center of 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 both sides of one end of the bracket plate 12, a feeding line roller 15 is rotatably installed on the longitudinal rotating seat 13, and a receiving line roller 16 is rotatably installed on the transverse rotating seat 14, the feeding line roller 15 and the receiving line roller 16 are both 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 one side of the bracket plate 12 close to the longitudinal rotating seat 13, and the cleaning pipe 41 is fixedly installed on the upper end of the side of the bracket plate 12 close to the longitudinal rotating seat 13. 41 is fixedly installed on the upper end of one side of the bracket plate 12 close to 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, and the side of the roughening sleeve 32 away from the cleaning pipe 41 is connected with the slotted sleeve 31, a loading guide wheel 17 is arranged between the longitudinal rotating seat 13 and the hot air pipe 21, and a unloading guide wheel 18 is arranged between the cleaning pipe 41 and the transverse rotating seat 14, and connecting plates are rotatably installed on both sides of the loading guide wheel 17 and the unloading guide wheel 18, and 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 one end of the bracket plate 12 away from the longitudinal rotating seat 13, and a tension control guide wheel 19 is rotatably installed on the output end of the hydraulic rod 20 away from the bracket plate 12.

[0056] In the above embodiment, it should be noted that the feeding line roller 15 and the receiving line roller 16 are configured as a detachable structure for easy transportation, and the outer walls of the feeding guide wheel 17, the unloading guide wheel 18 and the tension control guide wheel 19 are all provided with grooves that can be embedded with cables; the surface of the feeding line roller 15 is wrapped with the cable after the first insulation layer is extruded in S2. The use of the roughening and grooving device requires workers to install the feeding line roller 15 on the longitudinal rotating seat 13 and the receiving line roller 16 on the transverse rotating seat 14, and then pull out one end of the cable on the surface of the feeding line roller 15, pass it through the top groove of the feeding guide wheel 17, and then insert it into the hot air pipe 21, the surface groove of the tension control guide wheel 19, the grooved sleeve 31, the roughening sleeve 32 and the cleaning pipe 41 in turn, and finally Then it passes through the top groove of the unloading guide wheel 18 and is fixed on the receiving line roller 16, so as to achieve the effect of installing the cable to be grooved into the roughening groove device; the loading guide wheel 17, the unloading guide wheel 18, the tension control guide wheel 19 and the longitudinal rotating seat 13 and the transverse rotating seat 14 are all equipped with rotating motors, and the loading guide wheel 17, the unloading guide wheel 18 and the tension control guide wheel 19 are driven by the rotating motor to rotate, and at the same time drive the loading line roller 15 on the longitudinal rotating seat 13 and the receiving line roller 16 on the transverse rotating seat 14 to rotate, so as to achieve the effect of transmitting the cable in the various components of the roughening groove 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 groove device can be adjusted.

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

[0058] In the above embodiment, it should be noted that when the cable is transmitted through the hot air pipe 21, the impeller 27 is driven to rotate by starting the impeller motor 28, and the external air is drawn into the blower housing 25 through the filter 26 and sent to the heating pipe 23, and the electric heating wire 40 in the heating pipe 23 is started to heat the air. The heated air passes through the air holes on the surface of the annular protrusion along the air guide bend 22 and is blown into the hot air pipe 21, so as to achieve the effect of blowing away the dust and impurities on the surface of the first insulation layer of the cable in the hot air pipe 21 and softening the surface of the first insulation layer; the cable after passing through the hot air pipe 21 passes into the outlet pipe 24 and passes out from the other end of the outlet pipe 24 to enter the tension control guide wheel 19.

[0059] Embodiment 4, as Figure 3 , Figure 4 , Figure 7 - Fig.10 As shown, the production device of the double-core double-layer cable manufacturing process includes all the contents of Example 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, a gear ring 34 is rotatably installed in the annular slot, a gear motor 36 is fixedly installed on the top surface of the slotted sleeve 31, and a gear 35 is fixedly installed on the output end of the gear motor 36. The bottom of the gear 35 passes through the top opening of the annular slot and is meshed with the gear ring 34. A slotted inner tube 38 is provided in the center of the gear ring 34, and an inner tube bracket 37 is fixedly installed on the outer wall of the slotted inner tube 38. The inner tube bracket 37 is fixedly connected to the inner wall of the gear ring 34, a knife groove 39 is embedded and installed around the inner wall of the slotted inner tube 38, and the tail end of the knife groove 39 penetrates the slotted inner tube 38 to the outer wall of the slotted inner tube 38, and a roller bracket 30 is fixedly installed around the inner wall of the roughening sleeve 32, and a roughening roller 29 is rotatably installed on the end of the roller bracket 30 away from the inner wall of the roughening sleeve 32, and a spike structure is provided on the surface of the roughening roller 29, and the roughening roller 29 can fit the surface of the cable, and a sleeve bracket 33 is fixedly installed on the bottom surface of the slotted sleeve 31 and the roughening sleeve 32, and the sleeve bracket 33 is fixedly connected to the bracket plate 12.

[0060] In the above embodiment, it should be noted that the knife groove 39 is made of sharp cutting metal, the cable transmission enters the slotted sleeve 31 and passes through the slotted inner tube 38, and the gear motor 36 is started to drive the gear 35 to rotate, and the gear 35 drives the toothed ring 34 in the slotted sleeve 31 to rotate, and the toothed ring 34 drives the inner tube bracket 37 to drive the slotted inner tube 38 to rotate slowly, so as to achieve the effect of the knife groove 39 cutting a spiral groove on the surface of the first insulating layer of the cable; the cable passing through the slotted inner tube 38 will pass between the roughening rollers 29 in the roughening sleeve 32, and drive the roughening rollers 29 to roll along the surface of the first insulating layer of the cable, and the roughening rollers 29 pierce holes on the surface of the first insulating layer to achieve the effect of roughening the surface of the first insulating layer.

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

[0062] In the above embodiment, it should be noted that when the cable is transmitted through the cleaning pipe 41, water is pumped from the water tank 47 through the water pipe 42 and sprayed from the pressurized nozzle 43 to achieve the effect of flushing the surface of the first insulation layer of the cable and cleaning the debris; the sewage and debris generated by flushing the surface of the first insulation layer of the cable will enter the water collection chamber 45 from the drain hole 44, and finally flow into the drain pipe 46, and be discharged after separation treatment.

[0063] The production device of the double-core double-layer cable manufacturing process of the present invention is used as follows: the technicians in this field install the feeding line roller 15 on the longitudinal rotating seat 13, and install the receiving line roller 16 on the transverse rotating seat 14, then pull out one end of the cable on the surface of the feeding line roller 15, pass through the top groove of the feeding guide wheel 17, and then pass through the hot air pipe 21, the surface groove of the tension control guide wheel 19, the grooved sleeve 31, the roughening sleeve 32 and the cleaning pipe 41 in sequence, and finally pass through the top groove of the unloading guide wheel 18 and fix it on the receiving line roller 16. The rotating motor is started to drive the feeding guide wheel 17, the unloading guide wheel 18 and the tension control guide wheel 19 to rotate, and 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 transmitted through the hot air pipe 21, and the impeller motor 28 is started to drive the impeller 27 to rotate, and the external air is drawn into the blast housing 25 through the filter 26 and sent to the heating pipe 23, and the electric heating wire 40 in the heating pipe 23 is started to heat the air, and the heated air passes through the annular protrusion surface along the air guide bend 22. The cable passes through the hot air duct 21 through the air holes on the surface of the cable and blows into the hot air duct 21 to blow away dust and impurities on the surface of the first insulation layer of the cable in the hot air duct 21 and soften the surface of the first insulation layer. The cable passes through the hot air duct 21 and passes through the outlet pipe 24 and passes through the other end of the outlet pipe 24 to enter the tension control guide wheel 19, and then is driven into the slotted sleeve 31. The gear motor 36 is started to drive the gear 35 to rotate, and the gear 35 drives the gear ring 34 in the slotted sleeve 31 to rotate. The gear ring 34 drives the inner tube bracket 37 to drive the slotted inner tube 38 to rotate slowly, so that the knife groove 39 is on the electric A spiral groove is cut on the surface of the first insulating layer of the cable, and the cable passing through the grooved inner tube 38 will pass between the roughening rollers 29 in the roughening sleeve 32, and drive the roughening rollers 29 to roll along the surface of the first insulating layer of the cable and pierce holes on the surface of the first insulating layer to roughen the surface of the first insulating layer. Then the cable is driven through the cleaning pipe 41, and water is pumped from the water tank 47 through the water pipe 42 and sprayed from the pressurized nozzle 43 to flush and clean the surface of the first insulating layer of the cable. Finally, the cable passes through the top of the unloading guide wheel 18 and is wound on the receiving line roller 16.

[0064] The above is only a preferred embodiment of the present invention. Any person skilled in the art may modify the present invention by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solution of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. Double-core double-layer cable manufacturing process, characterized by: The steps include: S1. Select two suitable conductor materials, use a wire drawing machine to draw the two conductor materials respectively to make two conductor cores with required diameters, and then use an annealing furnace to anneal the two conductor cores; S2, putting the two conductor cores into an extruder at the same time, using the extruder to coat the insulating material on the two conductor cores through an extrusion process to form a first insulating layer, and then naturally cooling and curing; S3, placing the cable wrapped with the first insulating layer into a roughening and grooving device, which blows hot air to heat and soften the surface of the first insulating layer of the cable, while removing dust and impurities on the surface of the first insulating layer; S4, the roughening and grooving device firstly makes a thread groove on the surface of the first insulating layer of the cable, and then pokes uniform small holes on the surface of the first insulating layer to roughen the surface of the first insulating layer; S5, the roughening and grooving device sprays water on the roughened surface of the first insulating layer to flush and clean away debris and impurities on the surface of the first insulating layer; S6, using the extruder again to extrude the outer layer of insulating material on the roughened surface of the first insulating layer to form a second insulating layer, followed by natural cooling and solidification; S7. Use testing instruments to conduct various tests on the electrical properties, mechanical properties and environmental adaptability of the double-core double-layer cable. Finally, wind the finished cable on a reel for labeling and packaging.

2. The production device used in the double-core double-layer cable manufacturing process according to claim 1 is characterized in that: The roughening and grooving device comprises a base (11), a support plate (12) is fixedly mounted at the center of the top surface of the base (11), a longitudinal rotating seat (13) and a transverse rotating seat (14) are fixedly mounted 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 both sides of one end of the support plate (12), a feeding line roller (15) is rotatably mounted on the longitudinal rotating seat (13), and a receiving line roller (16) is rotatably mounted on the transverse rotating seat (14), and the feeding line roller (15) and the receiving line roller (16) are both used for winding cables.

3. The production device according to claim 2, characterized in that: The roughening and grooving device comprises a hot air pipe (21) and a cleaning pipe (41); the hot air pipe (21) is fixedly mounted on an upper end of a side of a support plate (12) close to a longitudinal rotating seat (13); the cleaning pipe (41) is fixedly mounted on an upper end of a side of a support plate (12) close to a transverse rotating seat (14); one end of the cleaning pipe (41) away from the transverse rotating seat (14) is fixedly connected to a roughening sleeve (32); and one side of the roughening sleeve (32) away from the cleaning pipe (41) is connected to a grooving sleeve (31).

4. The production device according to claim 3, characterized in that: A loading guide wheel (17) is arranged between the longitudinal rotating seat (13) and the hot air pipe (21), and a unloading guide wheel (18) is arranged between the cleaning pipe (41) and the transverse rotating seat (14). Connecting plates are rotatably installed on both sides of the loading guide wheel (17) and the unloading guide wheel (18), and 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 one end of the support plate (12) away from the longitudinal rotating seat (13), and a tension control guide wheel (19) is rotatably installed on the output end of one end of the hydraulic rod (20) away from the support plate (12).

5. The production device according to claim 4, characterized in that: A heating pipe (23) is fixedly mounted on the surface of the bracket plate (12) below the hot air pipe (21); one end of the hot air pipe (21) away from the feeding guide wheel (17) is fixedly connected to the air guide bend (22); the air guide bend (22) bends downward and is connected to the heating pipe (23); an annular protrusion is provided on the inner wall of one end of the air guide bend (22) connected to the hot air pipe (21); air holes are provided on the surface of the annular protrusion; the inner wall of the annular protrusion is fixedly connected to the outlet pipe (24); the outlet pipe (24) horizontally penetrates the air guide bend (22) at one end away from the annular protrusion.

6. The production device according to claim 5, characterized in that: A heating wire (40) is installed in the heating tube (23); a blast housing (25) is fixedly installed at one end of the heating tube (23) away from the air guide curved tube (22); an impeller (27) is rotatably installed in the blast housing (25); a filter screen (26) is fixedly installed on one side of the blast housing (25); an impeller motor (28) is fixedly installed on the other side of the blast housing (25); an output end of the impeller motor (28) passes through the blast housing (25) and is fixedly connected to the impeller (27).

7. The production device according to claim 3, characterized in that: 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, a gear ring (34) is rotatably installed in the annular slot, a gear motor (36) is fixedly installed on the top surface of the slotted sleeve (31), a gear (35) is fixedly installed on the output end of the gear motor (36), the bottom of the gear (35) passes through the top opening of the annular slot and is meshed with the gear ring (34), a slotted inner tube (38) is provided in the center of the gear ring (34), an inner tube bracket (37) is fixedly installed on the outer wall of the slotted inner tube (38), the inner tube bracket (37) is fixedly connected to the inner wall of the gear ring (34), and a knife groove (39) is embedded and installed around the inner wall of the slotted inner tube (38), and the tail end of the knife groove (39) passes through the slotted inner tube (38) to the outer wall of the slotted inner tube (38).

8. The production device according to claim 7, characterized in that: Roller brackets (30) are fixedly mounted around the inner wall of the roughening sleeve (32); a roughening roller (29) is rotatably mounted on one end of the roller bracket (30) away from the inner wall of the roughening sleeve (32); a spike structure is provided on the surface of the roughening roller (29); the roughening roller (29) can fit the surface of the cable; a sleeve bracket (33) is fixedly mounted on the bottom surface of the slotted sleeve (31) and the roughening sleeve (32); and the sleeve bracket (33) is fixedly connected to the bracket plate (12).

9. The production device according to claim 3, characterized in that: A water tank (47) is fixedly mounted on the top surface of the base (11) below the cleaning pipe (41); water pipes (42) are fixedly mounted on the top surface and both sides of the inner wall of the cleaning pipe (41); one end of the water pipe (42) close to the roughening sleeve (32) is sealed; one end of the water pipe (42) away from the roughening 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 mounted on a portion of the surface of the cleaning pipe (41) located on the inner wall of the cleaning pipe (41); the nozzles of the pressurized nozzles (43) face the center of the cleaning pipe (41).

10. The production device according to claim 9, characterized in that: The bottom surface of the inner wall of the cleaning pipe (41) is provided with a plurality of drainage holes (44) arranged in an array, and the bottom surface of the outer wall of the cleaning pipe (41) is fixedly provided with a water collecting chamber (45), the upper end of the water collecting chamber (45) covers all the drainage holes (44), the lower end of the water collecting chamber (45) is sealed and extends downward to the top of the water tank (47), and one side of the lower end of the water collecting chamber (45) is fixedly connected with a drainage pipe (46).

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