A welding process for aluminum sheath of high voltage cable

Abstract

The invention relates to the technical field of cable processing, and discloses a high-voltage cable aluminum sheath welding process, comprising the following steps: S1, taking a cable core and an aluminum strip and feeding them into an aluminum sheath forming component; S2, folding up two sides of the aluminum strip in the aluminum sheath forming component and surrounding the cable core; S3, heating the two sides of the aluminum strip by a high-frequency induction welding machine, squeezing the two sides together by an extrusion component, and extruding the oxide layers on the two sides of the aluminum strip by extrusion; S4, cooling the outer wall of the aluminum sheath by a cooling device; S5, performing surface inspection on the aluminum sheath after cooling by a surface inspection device, and performing repair welding on the damaged part of the surface of the aluminum sheath; S6, winding the aluminum sheath cable by a winding mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field of cable processing, and in particular relates to a high-voltage cable aluminum sheath welding process. Background Art

[0002] The cable aluminum sheath extrusion welding process wraps a layer of aluminum sheath outside the cable core to shield the signal, seal against moisture, and increase mechanical strength. The wall thickness of the aluminum sheath is 0.8 to 2.0 mm.

[0003] At present, a Chinese patent with publication number CN112071519 and publication date December 11, 2020 discloses a processing method for an aluminum sheathed cable, the steps of which are: S1, take the cable core and the aluminum strip and feed them into the aluminum sheath forming assembly; S2, fold up the two sides of the aluminum strip in the aluminum sheath forming assembly and surround the cable core; S3, heat the two sides of the aluminum strip by a high-frequency induction welding machine, extrude the two sides together by an extrusion assembly, and extrude the oxide layer on both sides of the aluminum strip by extrusion; S4, reduce the diameter and remove the oxide layer at the same time; S5, wind up the aluminum sheathed cable.

[0004] The surface temperature of the aluminum sheath will be very high after welding and extrusion. If it directly enters the winding mechanism for winding, it may cause the aluminum sheath to be deformed or damaged, which will eventually be detrimental to the shaping of the aluminum sheath. Summary of the invention

[0005] The purpose of the present invention is to provide a high-voltage cable aluminum sheath welding process, which can cool and shape the aluminum sheath after welding and extrusion by water cooling.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: A high voltage cable aluminum sheath welding process comprises the following steps:

[0007] S1, take the cable core and the aluminum strip and put them into the aluminum sheath forming assembly;

[0008] S2. The two sides of the aluminum tape are folded up in the aluminum sheath forming component and surround the cable core;

[0009] S3, heating both sides of the aluminum strip by a high-frequency induction welding machine, squeezing the two sides together by an extrusion assembly, and squeezing out the oxide layers on both sides of the aluminum strip by extrusion;

[0010] S4, cooling the outer wall of the aluminum jacket by using a cooling device;

[0011] S5. Use a surface detection device to perform surface detection on the aluminum sheath after cooling, and perform repair welding on the damaged parts on the surface of the aluminum sheath;

[0012] S6. Reel the aluminum sheathed cable through a reeling mechanism.

[0013] By adopting the above technical scheme, firstly, the cable core and the aluminum strip are taken and fed into the aluminum sheath forming component, and then the two sides of the aluminum strip are folded up in the aluminum sheath forming component to surround the cable core, wherein the two sides of the aluminum strip are heated by a high-frequency induction welding machine, and the two sides are squeezed together by an extrusion component, and at the same time, the oxide layer on the two sides of the aluminum strip is squeezed out by extrusion; and the aluminum sheathed cable after extrusion and welding needs to pass through a cooling device, and the cooling device can be used to cool the outer wall of the aluminum sheath; then the cooled aluminum sheathed cable can enter the surface detection device, so that the surface of the aluminum sheath after cooling is detected by the surface detection device, and the damaged part of the surface of the aluminum sheath is repaired by welding; finally, the aluminum sheathed cable can be wound up by a winding mechanism.

[0014] The present invention is further configured as follows: the cooling device includes a cooling trough, a first opening opened at both ends of the cooling trough and for the aluminum sheathed cable to pass through, a plurality of support columns arranged at the lower side of the cooling trough, a cooling tower located on one side of the cooling trough, a connecting arm arranged on the upper side of the cooling trough, a spray pipe connected to the connecting arm at one end and to the water outlet of the cooling tower at the other end, a recycling pump arranged at one side of the cooling tower and having its water outlet connected to the water inlet of the cooling tower, a recycling water pipe connected to the bottom wall of the cooling trough at one end and to the water inlet of the recycling pump at the other end, and a drying component for drying moisture from the outer wall of the aluminum sheathed cable.

[0015] By adopting the above technical scheme, the aluminum sheathed cable passes through the first opening and enters the cooling trough, wherein the cooled water in the cooling tower is sprayed on the outer wall of the aluminum sheathed cable through the spray pipe, thereby cooling the outer wall of the aluminum sheathed cable; and the sprayed water can be converted into hot water after heat exchange with the aluminum sheathed cable. At this time, the hot water in the cooling trough is injected into the cooling tower by using a recycling pump and a recycling water pipe, thereby cooling the hot water through the cooling tower, and finally realizing water circulation between the cooling trough and the cooling tower.

[0016] The present invention is further configured as follows: the drying assembly includes a centrifugal fan arranged below the aluminum sheathed cable, a spraying slot arranged at the air outlet at the upper end of the centrifugal fan, and a second opening opened at both ends of the spraying slot for the aluminum sheathed cable to pass through.

[0017] By adopting the above technical solution, when the aluminum sheathed cable is transmitted out of the cooling trough, the surface carries moisture. At this time, a centrifugal fan is used to supply air to the spraying trough, and the spraying trough uses the second opening for the aluminum sheathed cable to pass through. Finally, the moisture on the surface of the aluminum sheathed cable can be dried by the centrifugal fan.

[0018] The present invention is further configured as follows: the surface detection device includes a bracket located on the lower side of the aluminum sheathed cable, two semicircular sleeves arranged on the upper side of the bracket and wrapped around the outside of the aluminum sheathed cable on the left and right, a plurality of balls rotatably connected to the inner walls of the semicircular sleeves and in contact with the outer wall of the aluminum sheathed cable, a liquid box arranged in the semicircular sleeve and filled with liquid paint, an extrusion component arranged in the semicircular sleeve and used for driving the liquid paint in the liquid box to be extruded onto the outer wall of the aluminum sheathed cable when the ball is offset on the outer wall of the aluminum sheathed cable, and there is a clearance fit between the inner wall of the semicircular sleeve and the outer wall of the aluminum sheathed cable.

[0019] By adopting the above technical scheme, after the aluminum sheathed cable is transmitted out of the blowing slot, two semicircular sleeves are used to wrap around the outside of the aluminum sheathed cable, wherein the multiple ball bearings in the semicircular sleeves can abut against the outer wall of the aluminum sheathed cable, and when the damaged part on the aluminum sheath is transmitted to the ball bearing position, the ball bearings will be shifted on the outer wall of the aluminum sheathed cable. At this time, the extrusion component is used to extrude the liquid pigment in the liquid box onto the outer wall of the aluminum sheathed cable, so that the position of the damaged outer wall of the aluminum sheathed cable is marked by the liquid pigment, and then the operator can find the corresponding damaged position according to the position of the liquid pigment on the outer wall of the aluminum sheathed cable, which can finally help the operator to quickly repair the damaged part on the surface of the aluminum sheath.

[0020] The present invention is further configured as follows: a plurality of the balls are evenly distributed along the peripheral outer wall of the aluminum sheathed cable.

[0021] By adopting the above technical solution, multiple balls are evenly distributed along the peripheral outer wall of the aluminum sheathed cable. At this time, all positions on the outer wall of the aluminum sheathed cable can be fully monitored by the multiple balls.

[0022] The present invention is further configured as follows: the extrusion assembly includes a fixed arm arranged in a semicircular sleeve, a swing arm hinged at the end of the fixed arm and one end of which is rotatably connected to a ball, a piston box arranged in the semicircular sleeve and located at one side of the liquid box, a piston block embedded in the piston box, a piston rod arranged on the outer wall of the piston block, a driving column arranged at one end of the piston rod away from the piston block, a waist-shaped sleeve arranged at one end of the swing arm away from the ball and through which the driving column passes, an extrusion tube having one end connected to the inside of the piston box and the other end extending to the outside of the semicircular sleeve, a spraying tube having one end connected to one end of the extrusion tube away from the piston box and the other end extending to the outer wall of the aluminum sheathed cable, a first one-way valve arranged on the extrusion tube and used to control the extrusion tube to perform one-way extrusion toward the outside of the piston box, a liquid infusion tube having one end connected to the inside of the piston box and the other end connected to the liquid box, a second one-way valve arranged on the liquid infusion tube and used to control the liquid infusion tube to perform one-way liquid infusion toward the inside of the piston box, and a reset spring piece in a V shape with one end connected to the inner wall of the semicircular sleeve and the other end pressed against the swing arm.

[0023] By adopting the above technical scheme, when the surface of the aluminum sheath has a pit and is transmitted to the position of the ball, the swing arm can be driven to swing under the elastic force of the reset spring sheet, so that the ball is embedded in the pit. At the same time, the swing arm also drives the driving column, the piston rod and the piston block to move upward through the waist sleeve, and then the piston block can be squeezed toward the piston box. At this time, the liquid pigment in the piston box can pass through the extrusion tube and the first one-way valve and enter the spray tube, and the liquid pigment sprayed from the spray tube can fall on the surface of the aluminum sheath; because the flow of the liquid pigment in the extrusion tube and the spray tube takes time, and the aluminum sheath cable is always in a transmission state, after the ball leaves the pit position on the surface of the aluminum sheath and is transmitted to the position of the spray tube, the liquid pigment sprayed from the spray tube is just sprayed at the position near the pit, which can finally help the liquid pigment to accurately locate the pit position;

[0024] When the ball leaves the pit, it will move up and return to the position on the surface of the aluminum sheath, and the swing arm will swing in the opposite direction and then reset. At the same time, the swing arm also drives the drive column, piston rod and piston block to move downward through the waist sleeve, and then the piston block can be pulled out of the piston box. At this time, the second one-way valve can be opened, so that the liquid pigment in the liquid box can pass through the liquid replenishing tube and the second one-way valve into the piston box, and finally the missing liquid pigment in the piston box can be replenished, which is beneficial to the next liquid pigment extrusion of the piston box; finally, the operator performs repair welding on the pit according to the position of the liquid pigment on the surface of the aluminum sheathed cable.

[0025] The present invention is further configured as follows: an axial hole is provided at the center of the ball bearing, and a rotating shaft is provided at the end of the swing arm and penetrates into the axial hole.

[0026] By adopting the above technical solution, the swing arm uses the rotating shaft at the end to penetrate the axial hole at the center of the ball, thereby realizing the rotational connection of the ball at the end of the swing arm, so that rolling friction is formed between the ball and the outer wall of the aluminum sleeve, and finally the friction between the ball and the outer wall of the aluminum sleeve can be reduced.

[0027] The present invention is further configured as follows: there is a clearance fit between the end face of the spray pipe and the outer wall of the aluminum sheathed cable, an air duct in a C shape and surrounding the outside of multiple spray pipes is arranged on the outside of the semicircular sleeve, an air supply pipe with one end connected to the spray pipe and the other end connected to the air duct is arranged on the spray pipe, an air intake pipe extending in a vertical upward direction is arranged at the upper end of the air duct, an air guide hood is arranged on the upper side of the spraying slot, and two return air pipes are arranged on the upper side of the air guide hood, one end of which is connected to the air guide hood and the other end is connected to the upper end of the air intake pipe.

[0028] By adopting the above technical solution, the end face of the spray tube and the outer wall of the aluminum sheathed cable are used to form a clearance fit, thereby avoiding the wear of the outer wall of the aluminum sheath caused by friction between the spray tube and the outer wall of the aluminum sheath;

[0029] When the spray tube sprays the liquid pigment on the outer wall of the aluminum sheath, since there is a gap between the end face of the spray tube and the outer wall of the aluminum sheath cable, the liquid pigment cannot adhere to the outer wall of the aluminum sheath due to its own gravity. At this time, it is necessary to apply a blowing force to the spray tube from the outside, so that the liquid pigment can be stably attached to the outer wall of the aluminum sheath under the action of the airflow; at this time, the air guide cover is wrapped around the upper side of the spray slot, and the airflow sprayed upward from the spray slot can be merged into the air guide cover, and the air guide cover can introduce the airflow into the airway through the return air pipe, and then the airway can send the airflow into the spray tube through the air supply pipe, thereby helping the liquid pigment entering the spray tube to quickly adhere to the outer wall of the aluminum sheath;

[0030] At the same time, since the air guide hood introduces the airflow on the upper side of the spray slot into the spray pipe through the return air pipe, air duct and air supply pipe, a return airflow that continuously sprays the outer wall of the aluminum sheath can be formed in the spray pipe. The return airflow can further cool the outer wall of the aluminum sheath, which is ultimately conducive to the double reuse of the airflow sprayed from the spray slot.

[0031] The present invention is further configured as follows: a liquid replenishing tank filled with liquid paint is arranged above the two semicircular sleeves, sleeves are arranged on both sides of the lower end of the liquid replenishing tank, and a plug is arranged on the upper side of the semicircular sleeve, the lower end of which is connected to the liquid box and the upper end is used to be embedded in the sleeve.

[0032] By adopting the above technical solution, the liquid pigment in the liquid replenishing tank is used to replenish the liquid pigment in the liquid box, thereby ensuring that the liquid box is always full of liquid pigment.

[0033] The present invention is further configured as follows: the length of the swing arm between the waist sleeve and the fixed arm is greater than the length of the swing arm between the ball and the fixed arm.

[0034] By adopting the above technical solution, since the wall thickness of the aluminum sheath is 0.8~2.0mm, the thickness of the damaged part of the aluminum sheath is relatively small, which will cause the position offset of the ball to be relatively small, and may not produce sufficient extrusion displacement for the liquid pigment in the piston box; at this time, the length of the swing arm between the waist sleeve and the fixed arm is greater than the length of the swing arm between the ball and the fixed arm, thereby amplifying the position offset of the ball, and finally generating sufficient extrusion displacement for squeezing out the liquid pigment in the piston box through the swing arm.

[0035] The beneficial effects of the present invention are as follows: firstly, the cable core and the aluminum strip are taken and fed into the aluminum sheath forming assembly, then the two sides of the aluminum strip are folded up in the aluminum sheath forming assembly and the cable core is surrounded, wherein the two sides of the aluminum strip are heated by a high-frequency induction welding machine, the two sides are squeezed together by an extrusion assembly, and at the same time, the oxide layers on the two sides of the aluminum strip are squeezed out by extrusion; and the aluminum sheathed cable after extrusion and welding needs to pass through a cooling device, at which time the cooling device can be used to cool the outer wall of the aluminum sheath; then the cooled aluminum sheathed cable can enter the surface detection device, so that the surface of the aluminum sheath after cooling is detected by the surface detection device, and the damaged part of the surface of the aluminum sheath is repaired by welding; finally, the aluminum sheathed cable can be rolled up by a winding mechanism;

[0036] When the aluminum sheathed cable is cooled by the cooling device, the aluminum sheathed cable first passes through the first opening and then enters the cooling trough, wherein the cooled water in the cooling tower is sprayed on the outer wall of the aluminum sheathed cable through the spray pipe, thereby cooling the outer wall of the aluminum sheathed cable; and the spray water can be turned into hot water after heat exchange with the aluminum sheathed cable. At this time, the hot water in the cooling trough is injected into the cooling tower by the recycling pump and the recycling water pipe, thereby cooling the hot water through the cooling tower, and finally the water circulation between the cooling trough and the cooling tower can be realized; at the same time, when the aluminum sheathed cable is transmitted out of the cooling trough, the surface carries moisture, and at this time, the centrifugal fan is used to supply air to the spray trough, and the spray trough uses the second opening for the aluminum sheathed cable to pass through, and finally the moisture on the surface of the aluminum sheathed cable can be blown dry by the centrifugal fan;

[0037] At the same time, the aluminum sheathed cable can enter the surface detection device after leaving the spraying slot. First, two semicircular sleeves are used to wrap the outside of the aluminum sheathed cable. The multiple balls in the semicircular sleeves can contact the outer wall of the aluminum sheathed cable. When there are pits on the surface of the aluminum sheath and they are transmitted to the position of the balls, the swing arm can be driven to swing under the elastic force of the reset spring piece, so that the balls are embedded in the pits. At the same time, the swing arm also drives the driving column, the piston rod and the piston block to move upward through the waist sleeve, and then the piston block can be squeezed toward the piston box. At this time, the liquid pigment in the piston box can pass through the extrusion tube and After passing through the first one-way valve, the paint enters the spray pipe. Since the spray pipe has an airflow introduced by the air guide hood, the airflow can push the liquid pigment so that the liquid pigment sprayed from the spray pipe falls stably on the surface of the aluminum sheath. Since the liquid pigment needs time to flow in the extrusion pipe and the spray pipe, and the aluminum sheathed cable is always in a transmission state, after the ball leaves the pit position on the surface of the aluminum sheath and is transmitted to the position of the spray pipe, the liquid pigment sprayed from the spray pipe is just sprayed at the position near the pit, which is ultimately conducive to the liquid pigment to accurately locate the pit position.

[0038] When the ball leaves the pit, it will move up and return to the position on the surface of the aluminum sheath, while the swing arm will swing in the opposite direction and then reset. At the same time, the swing arm will drive the drive column, piston rod and piston block to move downward through the waist sleeve, and then the piston block can be withdrawn to the outside of the piston box. At this time, the second one-way valve can be opened, so that the liquid pigment in the liquid box can pass through the liquid replenishing tube and the second one-way valve into the piston box, and finally the liquid pigment that is lacking in the piston box due to outward extrusion can be supplemented, which is beneficial to the next extrusion of liquid pigment from the piston box; finally, the operator will repair the pit according to the position of the liquid pigment on the surface of the aluminum sheathed cable.

[0039] Since the air guide hood introduces the air flow on the upper side of the spray slot into the spray pipe through the return air pipe, the air duct and the air supply pipe, a return air flow that continuously sprays the outer wall of the aluminum sheath can be formed in the spray pipe. The return air flow can further cool the outer wall of the aluminum sheath, which is ultimately conducive to the double reuse of the air flow sprayed from the spray slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 It is a schematic diagram of the connection relationship between the cooling device and the surface detection device in the present invention;

[0042] Figure 2 It is a schematic structural diagram of the surface detection device in the present invention;

[0043] Figure 3 It is a partial cross-sectional view of the connection relationship between the semicircular sleeve, the ball, the liquid box and the extrusion assembly in the present invention. At this time, the ball contacts the flat outer wall of the aluminum sheath cable, and a recycled airflow is formed in the spray tube to continuously spray the outer wall of the aluminum sheath, and the outer wall of the aluminum sheath is further cooled by the recycled airflow;

[0044] Figure 4 It is a partial cross-sectional view of the connection relationship between the semicircular sleeve, the ball, the liquid box and the extrusion assembly in the present invention. At this time, the ball is embedded in the pit on the surface of the aluminum sheathed cable under the elastic force of the reset spring, and the swing arm drives the driving column, the piston rod and the piston block to move upward through the waist sleeve, and then the piston block is squeezed toward the piston box, and the liquid pigment in the piston box passes through the extrusion tube and the first one-way valve and enters the spray tube;

[0045] Figure 5It is a partial cross-sectional view of the connection relationship between the semicircular sleeve, the ball, the liquid box and the extrusion assembly in the present invention. At this time, after the ball leaves the pit position on the surface of the aluminum sleeve and is transmitted to the position of the spray tube, the liquid paint sprayed from the spray tube is sprayed at the position near the pit.

[0046] In the figure, 1, cooling device; 11, cooling tank; 12, first opening; 13, support column; 14, cooling tower; 15, connecting arm; 16, spray pipe; 17, recycling pump; 18, recycling water pipe; 19, drying assembly; 191, centrifugal fan; 192, spray tank; 193, second opening; 2, surface detection device; 21, bracket; 22, semicircular sleeve; 221, intubation; 23, ball bearing; 231, shaft hole; 24, liquid box; 25, extrusion assembly; 2 51. Fixed arm; 252. Swing arm; 2521. Rotating shaft; 253. Piston box; 254. Piston block; 255. Piston rod; 256. Driving column; 257. Waist sleeve; 258. Extrusion tube; 259. Spray tube; 260. First one-way valve; 261. Fluid replenishment tube; 262. Second one-way valve; 263. Reset spring; 3. Airway; 31. Air supply pipe; 32. Air intake pipe; 4. Air guide hood; 41. Reuse air pipe; 5. Fluid replenishment tank; 51. Sleeve. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] A high-voltage cable aluminum sheath welding process, the high-voltage cable aluminum sheath welding process comprising the following steps:

[0049] S1, take the cable core and the aluminum strip and put them into the aluminum sheath forming assembly;

[0050] S2. The two sides of the aluminum tape are folded up in the aluminum sheath forming component and surround the cable core;

[0051] S3, heating both sides of the aluminum strip by a high-frequency induction welding machine, squeezing the two sides together by an extrusion assembly, and squeezing out the oxide layers on both sides of the aluminum strip by extrusion;

[0052] S4, cooling the outer wall of the aluminum sheath by using the cooling device 1;

[0053] S5, using the surface detection device 2 to perform surface detection on the aluminum sheath after cooling, and performing repair welding on the damaged parts on the surface of the aluminum sheath;

[0054] S6. The aluminum-sheathed cable is wound by a winding mechanism.

[0055] Since the aluminum-sheathed cable needs to be welded by a high-frequency induction welding machine, the overall transmission speed of the aluminum-sheathed cable is relatively slow.

[0056] Refer to Figure 1 , and the cooling device 1 includes a cooling tank 11, a first opening 12, support columns 13, a cooling tower 14, a connecting arm 15, a spray pipe 16, a reuse pump 17, a recycled water pipe 18, and a drying component 19. The cross-section of the cooling tank 11 is in a "U" shape. The first opening 12 is opened at both ends of the cooling tank 11 and allows the aluminum-sheathed cable to pass through. At the same time, a plurality of support columns 13 are welded under the cooling tank 11. The cooling tower 14 is located on one side of the cooling tank 11, and the circulating water can be cooled through the cooling tower 14. The connecting arm 15 is fixed on the upper side of the cooling tank 11 by bolts. One end of the spray pipe 16 is connected to the connecting arm 15 and the other end is connected to the water outlet of the cooling tower 14. At the same time, the reuse pump 17 is arranged on one side of the cooling tower 14 and its water outlet is connected to the water inlet of the cooling tower 14. One end of the recycled water pipe 18 is connected to the bottom wall of the cooling tank 11 and the other end is connected to the water inlet of the reuse pump 17.

[0057] Refer to Figure 1 , and the drying component 19 is located at one end of the cooling tank 11 close to the transmission of the aluminum-sheathed cable. The drying component 19 can be used to dry the moisture on the outer wall of the aluminum-sheathed cable. The drying component 19 includes a centrifugal fan 191, a blowing tank 192, and a second opening 193. The centrifugal fan 191 is arranged below the aluminum-sheathed cable. The blowing tank 192 is welded at the air outlet at the upper end of the centrifugal fan 191. At the same time, the second opening 193 is opened at both ends of the blowing tank 192 and allows the aluminum-sheathed cable to pass through. Both the first opening 12 and the second opening 193 are in a U shape and cotton pads (not shown in the figure) are provided on the inner walls to avoid abrasion of the outer wall of the aluminum-sheathed cable.

[0058] Refer to Figure 1 , Figure 2 , Figure 3The surface detection device 2 is located on the side of the centrifugal fan 191 away from the cooling tank 11. The surface detection device 2 includes a bracket 21, a semicircular sleeve 22, a ball 23, a liquid box 24, and an extrusion assembly 25. The bracket 21 is supported on the ground, and two semicircular sleeves 22 are provided and fixed to the bracket 21 by bolts. At the same time, the two semicircular sleeves 22 are wrapped around the outside of the aluminum sheathed cable, and a plurality of ball 23 are provided in the semicircular sleeve 22 and are rotatably connected in the semicircular sleeve 22, wherein the inner wall of the semicircular sleeve 22 and the outer wall of the aluminum sheathed cable are clearance-matched, and the plurality of ball 23 It is evenly distributed along the circumferential outer wall of the aluminum sheathed cable; at the same time, the liquid box 24 is bonded and fixed to the inner wall of the semicircular sleeve 22, and the liquid box 24 is arc-shaped and the center of the circle is located on the central axis of the semicircular sleeve 22, wherein the liquid box 24 is loaded with liquid pigment, and the color of the liquid pigment is different from the color of the outer wall of the aluminum sheath; at the same time, a liquid replenishing tank 5 filled with liquid pigment is arranged above the two semicircular sleeves 22, and sleeves 51 are integrally arranged on both sides of the lower end of the liquid replenishing tank 5, wherein the upper side of the semicircular sleeve 22 is provided with a tube 221 whose lower end is connected to the liquid box 24 and whose upper end is used to be embedded in the sleeve 51.

[0059] Reference Figure 2 , Figure 3 , Figure 4 The extrusion assembly 25 is arranged in the semicircular sleeve 22 and is used to drive the liquid pigment in the liquid box 24 to be extruded onto the outer wall of the aluminum sheathed cable when the ball 23 is offset on the outer wall of the aluminum sheathed cable. The extrusion assembly 25 includes a fixed arm 251, a swing arm 252, a piston box 253, a piston block 254, a piston rod 255, a driving column 256, a waist sleeve 257, an extrusion tube 258, a spray tube 259, a first one-way valve 260, a liquid replenishing tube 261, a second one-way valve 262, and a reset spring 263; wherein the fixed arm 251 is welded in the semicircular sleeve 22, and the swing arm 252 is hinged at the end of the fixed arm 251 and one end is connected to the ball 23 for rotation, and an axial hole 231 is opened at the center of the ball 23, and the swing arm 25 2 is integrally provided with a rotating shaft 2521 that penetrates into the shaft hole 231; at the same time, the piston box 253 is bonded and fixed in the semicircular sleeve 22 and is located at one side of the liquid box 24, the piston box 253 can correspond to the position of the ball 23, and the piston block 254 is embedded in the piston box 253, wherein the piston rod 255 is integrally arranged on the outer wall of the piston block 254, and the driving column 256 is integrally arranged at the end of the piston rod 255 away from the piston block 254; at the same time, the waist sleeve 257 is welded at the end of the swing arm 252 away from the ball 23 and for the driving column 256 to pass through, and the length of the swing arm 252 between the waist sleeve 257 and the fixed arm 251 is greater than the length of the swing arm 252 between the ball 23 and the fixed arm 251.

[0060] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , the extrusion tube 258 is connected to the piston box 253 at one end and the other end passes through the semicircular sleeve 22, while the spray tube 259 is connected to the end of the extrusion tube 258 away from the piston box 253 at one end and the other end extends to the outer wall of the aluminum sheathed cable, and the spray tube 259 is perpendicular to the extrusion tube 258, and there is a gap fit between the end face of the spray tube 259 and the outer wall of the aluminum sheathed cable; wherein the first one-way valve 260 is installed on the extrusion tube 258 and is used to control the one-way extrusion of the extrusion tube 258 toward the outside of the piston box 253, and the liquid replenishment tube 261 is connected to the piston box 253 at one end and the liquid box 24 at the other end, and the second one-way valve 262 is installed on the liquid replenishment tube 261 and is used to control the liquid replenishment tube 261 toward One-way fluid replenishment is carried out in the piston box 253; the reset spring 263 is V-shaped and made of spring steel, and one end of the reset spring 263 is welded to the inner wall of the semicircular sleeve 22 and the other end is pressed against the swing arm 252; at the same time, a C-shaped air duct 3 is arranged on the outside of the semicircular sleeve 22 and surrounded by multiple spray pipes 259, and the spray pipe 259 is provided with an air supply pipe 31 whose one end is connected to the spray pipe 259 and the other end is connected to the air duct 3, wherein the upper end of the air duct 3 is integrally provided with an air intake pipe 32 extending in a vertical upward direction, and an air guide hood 4 is fixed to the upper side of the blowing slot 192 by bolts, and at the same time, two return air pipes 41 are arranged on the upper side of the air guide hood 4, one end of which is connected to the air guide hood 4 and the other end is connected to the upper end of the air intake pipe 32.

[0061] Principle: First, take the cable core and the aluminum strip and feed them into the aluminum sheath forming assembly. Then, the two sides of the aluminum strip are folded up in the aluminum sheath forming assembly to surround the cable core. The two sides of the aluminum strip are heated by a high-frequency induction welding machine, and the two sides are squeezed together by an extrusion assembly. At the same time, the oxide layer on the two sides of the aluminum strip is squeezed out by extrusion. The aluminum sheathed cable after extrusion and welding needs to pass through a cooling device 1, and the cooling device 1 can be used to cool the outer wall of the aluminum sheath. Then, the cooled aluminum sheathed cable can enter the surface detection device 2, so that the surface of the aluminum sheath after cooling can be inspected by the surface detection device 2, and the damaged parts of the aluminum sheath surface can be repaired by welding. Finally, the aluminum sheathed cable can be reeled by a reeling mechanism.

[0062] When the aluminum sheathed cable is cooled by the cooling device 1, the aluminum sheathed cable first passes through the first opening 12 and then enters the cooling tank 11, wherein the cooled water in the cooling tower 14 is sprayed on the outer wall of the aluminum sheathed cable through the spray pipe 16, thereby cooling the outer wall of the aluminum sheathed cable; and the spray water can be turned into hot water after heat exchange with the aluminum sheathed cable. At this time, the hot water in the cooling tank 11 is injected into the cooling tower 14 by the recycling pump 17 and the recycling water pipe 18, thereby cooling the hot water through the cooling tower 14, and finally the water circulation between the cooling tank 11 and the cooling tower 14 can be realized; at the same time, when the aluminum sheathed cable is transmitted out of the cooling tank 11, the surface carries moisture, and at this time the centrifugal fan 191 is used to supply air to the spray tank 192, and the spray tank 192 uses the second opening 193 for the aluminum sheathed cable to pass through, and finally the moisture on the surface of the aluminum sheathed cable can be blown dry by the centrifugal fan 191;

[0063] At the same time, the aluminum sheathed cable can enter the surface detection device 2 after leaving the spraying slot 192. First, two semicircular sleeves 22 are used to wrap around the outside of the aluminum sheathed cable, and multiple balls 23 in the semicircular sleeves 22 can contact the outer wall of the aluminum sheathed cable. When the surface of the aluminum sheath has pits and is transmitted to the position of the balls 23, the swing arm 252 can be driven to swing under the elastic force of the reset spring piece 263, so that the balls 23 are embedded in the pits. At the same time, the swing arm 252 also drives the drive column 256, the piston rod 255 and the piston block 254 to move upward through the waist sleeve 257, and then the piston block 254 can be squeezed toward the piston box 253. At this time, the liquid pigment in the piston box 253 can be After passing through the extrusion tube 258 and the first one-way valve 260, it enters the spray tube 259. Since the spray tube 259 has an airflow introduced by the air guide hood 4, the airflow can push the liquid pigment so that the liquid pigment sprayed from the spray tube 259 falls stably on the surface of the aluminum sheath. Since the liquid pigment needs time to flow in the extrusion tube 258 and the spray tube 259, and the aluminum sheathed cable is always in a slow transmission state, after the ball 23 leaves the pit position on the surface of the aluminum sheath and is transmitted to the position of the spray tube 259, the liquid pigment sprayed from the spray tube 259 is just sprayed at the position near the pit, which can finally help the liquid pigment to accurately locate the pit position.

[0064] When the ball 23 leaves the pit, the ball 23 will move up and return to the position on the surface of the aluminum sheath, while the swing arm 252 will swing in the opposite direction and then reset. At the same time, the swing arm 252 also drives the drive column 256, the piston rod 255 and the piston block 254 to move downward through the waist sleeve 257. Then the piston block 254 can be withdrawn to the outside of the piston box 253. At this time, the second one-way valve 262 can be opened, so that the liquid pigment in the liquid box 24 can pass through the liquid replenishing tube 261 and the second one-way valve 262 and enter the piston box 253. Finally, the liquid pigment that is missing in the piston box 253 due to outward extrusion can be supplemented, which is beneficial to the next liquid pigment extrusion of the piston box 253. Finally, the operator performs repair welding on the pit according to the position of the liquid pigment on the surface of the aluminum sheathed cable.

[0065] Since the air guide hood 4 introduces the airflow on the upper side of the spray slot 192 into the spray pipe 259 through the return air pipe 41, the air duct 3 and the air supply pipe 31, a return airflow that continuously sprays the outer wall of the aluminum sheath can be formed in the spray pipe 259. The return airflow can further cool the outer wall of the aluminum sheath, which is ultimately beneficial to the double reuse of the airflow sprayed from the spray slot 192.

Claims

1. A high voltage cable aluminum sheath welding process, characterized in that: The method comprises the following steps: S1, taking the cable core and the aluminum strip and feeding them into the aluminum sheath forming component; S2, folding up the two sides of the aluminum strip in the aluminum sheath forming component and surrounding the cable core; S3, heating the two sides of the aluminum strip by a high-frequency induction welding machine, squeezing the two sides together by an extrusion component, and squeezing out the oxide layer on the two sides of the aluminum strip by extrusion; S4, cooling the outer wall of the aluminum sheath by a cooling device (1); S5, performing surface inspection on the aluminum sheath after cooling by a surface inspection device (2), and repairing the damaged part on the surface of the aluminum sheath by welding; S6, using a winding machine The cooling device (1) comprises a cooling trough (11), first openings (12) provided at both ends of the cooling trough (11) and through which the aluminum sheathed cable passes, a plurality of support columns (13) arranged at the lower side of the cooling trough (11), a cooling tower (14) located at one side of the cooling trough (11), a connecting arm (15) arranged at the upper side of the cooling trough (11), a spray pipe (16) connected to the connecting arm (15) at one end and connected to a water outlet of the cooling tower (14) at the other end, and a recycling pump (16) arranged at one side of the cooling tower (14) and having a water outlet connected to a water inlet of the cooling tower (14). 17), a recycling water pipe (18) having one end connected to the bottom wall of the cooling tank (11) and the other end connected to the water inlet of the recycling pump (17), and a drying assembly (19) for drying the moisture on the outer wall of the aluminum sheathed cable; the drying assembly (19) comprises a centrifugal fan (191) arranged below the aluminum sheathed cable, a spraying slot (192) arranged at the air outlet at the upper end of the centrifugal fan (191), and a second opening (193) provided at both ends of the spraying slot (192) and for the aluminum sheathed cable to pass through; the surface detection device (2) comprises a bracket (21) located at the lower side of the aluminum sheathed cable, Two semicircular sleeves (22) are arranged on the upper side of a bracket (21) and wrap around the outside of an aluminum sheathed cable on the left and right sides; a plurality of balls (23) are rotatably connected to the inner wall of the semicircular sleeve (22) and abut against the outer wall of the aluminum sheathed cable; a liquid box (24) is arranged in the semicircular sleeve (22) and contains liquid pigment; and an extrusion component (25) is arranged in the semicircular sleeve (22) and is used to drive the liquid pigment in the liquid box (24) to be extruded onto the outer wall of the aluminum sheathed cable when the ball (23) is offset on the outer wall of the aluminum sheathed cable; the inner wall of the semicircular sleeve (22) and the outer wall of the aluminum sheathed cable are clearance-matched.

2. A high voltage cable aluminum sheath welding process according to claim 1, characterized in that: The plurality of rolling balls (23) are evenly distributed along the peripheral outer wall of the aluminum sheathed cable.

3. A high voltage cable aluminum sheath welding process according to claim 1, characterized in that: The extrusion assembly (25) comprises a fixed arm (251) arranged in the semicircular sleeve (22), a swing arm (252) hinged at the end of the fixed arm (251) and one end of which is rotatably connected to the ball (23), a piston box (253) arranged in the semicircular sleeve (22) and located at a position on one side of the liquid box (24), a piston block (254) embedded in the piston box (253), a piston rod (255) arranged on the outer wall of the piston block (254), a driving column (256) arranged at one end of the piston rod (255) away from the piston block (254), a waist sleeve (257) arranged at one end of the swing arm (252) away from the ball (23) and through which the driving column (256) passes, and a piston box (253) having one end connected to the piston box (253) and the other end extending out of the semicircular sleeve. an extrusion tube (258) outside the piston box (22), a spray tube (259) having one end connected to one end of the extrusion tube (258) away from the piston box (253) and the other end extending to the outer wall of the aluminum sheathed cable, a first one-way valve (260) arranged on the extrusion tube (258) and used to control the extrusion tube (258) to unidirectionally extrude toward the outside of the piston box (253), a liquid replenishing tube (261) having one end connected to the inside of the piston box (253) and the other end connected to the liquid box (24), a second one-way valve (262) arranged on the liquid replenishing tube (261) and used to control the liquid replenishing tube (261) to unidirectionally replenish the inside of the piston box (253), and a reset spring (263) in a V shape with one end connected to the inner wall of the semicircular sleeve (22) and the other end pressed against the swing arm (252).

4. A high voltage cable aluminum sheath welding process according to claim 3, characterized in that: An axial hole (231) is provided at the center of the ball (23), and a rotating shaft (2521) is provided at the end of the swing arm (252) and penetrates into the axial hole (231).

5. A high voltage cable aluminum sheath welding process according to claim 3, characterized in that: There is a clearance fit between the end face of the spray tube (259) and the outer wall of the aluminum sheathed cable; an air duct (3) in a C shape and surrounding the outside of the plurality of spray tubes (259) is arranged on the outer side of the semicircular sleeve (22); an air supply pipe (31) is arranged on the spray tube (259) at one end thereof being connected to the spray tube (259) and at the other end thereof being connected to the inside of the air duct (3); an air intake pipe (32) extending in a vertical upward direction is arranged at the upper end of the air duct (3); an air guide hood (4) is arranged on the upper side of the spraying slot (192); and two return air pipes (41) are arranged on the upper side of the air guide hood (4) and at one end thereof are connected to the air guide hood (4) and at the other end thereof are connected to the upper end of the air intake pipe (32).

6. A high voltage cable aluminum sheath welding process according to claim 3, characterized in that: A liquid replenishing tank (5) filled with liquid pigment is arranged above the two semicircular sleeves (22), sleeves (51) are arranged on both sides of the lower end of the liquid replenishing tank (5), and a plug (221) is arranged on the upper side of the semicircular sleeve (22), the lower end of which is connected to the liquid box (24) and the upper end of which is used to be embedded in the sleeve (51).

7. A high voltage cable aluminum sheath welding process according to claim 3, characterized in that: The length of the swing arm (252) between the waist-shaped sleeve (257) and the fixed arm (251) is greater than the length of the swing arm (252) between the ball (23) and the fixed arm (251).

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