Graphite coating equipment for low-noise cable processing

Abstract

The invention relates to the technical field of graphite coating, in particular to graphite coating equipment for low-noise cable processing. Comprising a rack, a winding and unwinding mechanism, a first reciprocating motion unit, a second reciprocating motion unit, a third reciprocating motion unit and a fourth reciprocating motion unit, a double-head motor is fixedly arranged on the rack, a transmission shaft is fixedly arranged on an output shaft of the double-head motor, and the winding and unwinding mechanism is used for achieving synchronous intermittent winding and unwinding of a cable to be coated and driving the cable to be coated to rotate around the axis of the winding and unwinding mechanism; the two side faces of the coating box communicate with threading pipes allowing a cable to be coated to penetrate through, the second reciprocating motion unit is connected with two reciprocating pressing frames with the interval capable of being adjusted in a reciprocating mode, the two reciprocating pressing frames are rotationally connected with rotating frames, and the two rotating frames are driven by transmission shafts and intermittently and synchronously rotate. The method has the beneficial effect that the problems that in the prior art, a graphite coating layer on the surface of a cable is poor in uniformity and insufficient in adhesive force are solved.

Description

Technical Field

[0001] This invention relates to the field of graphite coating technology, specifically to a low-noise cable processing graphite coating equipment. Background Technology

[0002] In the field of high-voltage and ultra-high-voltage cable production, the cable outer sheath not only needs to provide physical protection, but also needs to achieve electrical safety performance testing through the application of a graphite conductive coating. Therefore, the uniformity, adhesion and structural density of the graphite coating directly affect the testing accuracy and cable reliability. With the increasing market demand for low-noise and high-performance cables, traditional graphite coating technology can no longer meet the stringent production requirements.

[0003] The prior art patent document CN102856007A discloses a graphite coating device for cable surfaces. This device uses a liquid graphite tank to store graphite slurry, sprays the slurry onto the cable surface through an actively driven slurry-lifting wheel, and then achieves coating through a sponge wiping device. Although the above device solves the dust pollution problem caused by traditional powdered graphite coating, it still has several technical defects in practical applications. The specific problems are as follows: The graphite coating on the cable surface has poor uniformity and insufficient adhesion, making it impossible to achieve continuous and precise coordination in the coating operation, resulting in low production efficiency. The coating curing method is also limited, leading to insufficient density and a tendency to peel off and crack. Based on this, the present invention provides a low-noise cable processing graphite coating equipment to solve the problems mentioned in the background art. Summary of the Invention

[0004] This invention addresses the technical problems existing in the prior art by providing a low-noise cable processing graphite coating equipment to solve the problems of poor uniformity and insufficient adhesion of the graphite coating layer on the cable surface in existing devices, the inability to achieve continuous and precise collaborative coating operations, and low production efficiency.

[0005] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A low-noise cable processing graphite coating equipment includes a frame on which a dual-head motor is fixedly mounted, and a transmission shaft is fixedly mounted on the output shaft of the dual-head motor. It also includes: The winding and unwinding mechanism enables the synchronous intermittent winding and unwinding of the cable to be coated and drives the cable to be coated to rotate around its axis. The first reciprocating motion unit is connected to a coating box that reciprocates along the axis of the cable to be coated. Both sides of the coating box are connected to conduits for the cable to be coated to pass through. The second reciprocating motion unit has two reciprocating pressure frames with adjustable spacing connected to it. Each of the two reciprocating pressure frames is rotatably connected to a rotating frame. Both rotating frames are driven by a transmission shaft and rotate intermittently and synchronously. Two symmetrically arranged pressing clamps, each with two connecting rods hinged to its top surface, the other ends of which are respectively hinged to two rotating frames. Two sets of graphite nozzles are fixedly mounted on two rotating frames, and the two sets of graphite nozzles are respectively set on both sides of the pressing clamp; Graphite supply system for supplying graphite to graphite nozzles; An induction heating coil is fixed on the frame and used for heating and curing graphite.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] As a preferred technical solution of the present invention, the winding and unwinding mechanism includes a rotating frame rotatably connected to the frame, a first synchronous toothed belt drivingly connecting the rotating frame and the transmission shaft, a winding wheel and a belt shaft rotatably connected to the rotating frame, a linkage gear fixedly installed on both the winding wheel and the belt shaft, the two linkage gears meshing with each other, a driven bevel gear fixedly installed on the belt shaft, a toothed rail coaxially arranged with the rotating frame fixedly installed on the frame, a semi-annular bevel gear ring fixedly installed on the toothed rail, the semi-annular bevel gear ring meshing with the driven bevel gear, the arc center angle corresponding to the effective meshing arc segment on the semi-annular bevel gear ring being 180°, the two ends of the cable to be coated being respectively fixedly installed on two winding wheels in the two winding and unwinding mechanisms, a guide tube fixedly installed on the rotating frame, the guide tube being coaxially arranged with the cable threading tube.

[0008] As a preferred embodiment of the present invention, the first reciprocating motion unit includes a gear shaft and a wheel shaft rotatably connected to the frame. Both the gear shaft and the transmission shaft are fixedly mounted with linkage bevel gears, which mesh orthogonally. A second synchronous toothed belt drives the wheel shaft and the gear shaft. Two rotating wheels are fixedly mounted on the wheel shaft, and each rotating wheel has two cam drive units arranged in an array. Guide wheels are rotatably connected to both sides of the coating box. The two cam drive units alternately abut against the guide wheels at corresponding positions, and the transmission strokes of the two cam drive units to the guide wheels are different. Slider blocks are fixedly mounted on both sides of the coating box, and both sliders are slidably connected to the frame. Return springs are mounted on the sides of both sliders, and the other ends of both return springs are fixedly connected to the frame.

[0009] As a preferred technical solution of the present invention, the second reciprocating motion unit includes a ball screw rotatably connected to the frame, and a torsion spring is provided at the rotatable connection between the two. The ball screw is symmetrically provided with a left-hand threaded section and a right-hand threaded section. The left-hand threaded section and the right-hand threaded section are respectively connected to two reciprocating pressure frames. Both reciprocating pressure frames are slidably connected to the frame. A first gear is fixedly installed on the transmission shaft, and a reciprocating gear is fixedly installed on the ball screw. The first gear meshes with the reciprocating gear.

[0010] As a preferred embodiment of the present invention, the second reciprocating motion unit further includes a synchronous shaft and a coupling rotatably connected to the frame. A third synchronous toothed belt is connected between the transmission shaft and the coupling. A second gear is fixedly installed on the coupling. An intermittent gear is installed on the synchronous shaft. The second gear meshes with the intermittent gear. Hollow sleeve shafts are rotatably connected to both reciprocating pressure frames. A synchronous guide groove with open ends and slidably connected to the synchronous shaft is opened on the hollow sleeve shaft. A fourth synchronous toothed belt is connected to both hollow sleeve shafts. The two fourth synchronous toothed belts are respectively connected to the two rotating frames.

[0011] As a preferred technical solution of the present invention, the cross-sections of the synchronous guide groove and the synchronous shaft are both regular hexagons, the central angles corresponding to the effective meshing arc segments on the first part gear and the second part gear are both 70°, and the effective meshing arc segments on the first part gear and the second part gear are staggered by 180°.

[0012] As a preferred technical solution of the present invention, both of the two crimping clamps are provided with an arc-shaped heat-coating surface on one side of the cable to be coated. Both the crimping clamps and the arc-shaped heat-coating surface are made of 304 stainless steel, and the crimping clamps are integrated with an electric heating block. The coverage angle corresponding to the arc-shaped heat-coating surface is 180°, and the surface of the arc-shaped heat-coating surface is smooth and has a nano anti-stick coating.

[0013] As a preferred technical solution of the present invention, the graphite supply system includes a graphite storage tank fixed on the frame, a feeding pump connected to the graphite storage tank, a three-way flexible hose connected to the discharge port of the feeding pump, a graphite guide cavity opened in each rotating frame, a graphite nozzle connected to the graphite guide cavity at the corresponding position, a material ring rotatably connected to each graphite guide cavity, and the other two ends of the three-way flexible hose being fixedly connected to two material rings respectively.

[0014] As a preferred technical solution of the present invention, a main controller is fixedly installed on the frame, and the axis of the graphite nozzle is perpendicular to the axis of the conduit.

[0015] The beneficial effects of this invention are: The present invention solves the problems of poor uniformity and insufficient adhesion of the graphite coating layer on the surface of the cable in the prior art, and improves the coating quality through the coordinated operation of multiple modules. The winding and unwinding mechanism synchronously completes the intermittent winding and unwinding of the cable to be coated and the rotation around its own axis by means of the 180° meshing design of the semi-annular bevel gear ring and the driven bevel gear, ensuring stable force on the cable during the coating process and full exposure in all directions. The first reciprocating motion unit drives the coating box to make an alternating variable-stroke reciprocating movement along the axis of the cable through the cooperation of the double-cam transmission part and the return spring. Combined with the scraping action of the fluororubber elastic sealing sleeve in the pipe, it avoids uneven thickness of the coating layer. The second reciprocating motion unit drives the pressing clamp and the graphite nozzle to act in coordination. The 180° arc-shaped hot compress surface of the pressing clamp is combined with the built-in electric heating block to achieve pre-curing pressing, and the two graphite nozzles on both sides synchronously carry out supplementary coating and trimming, forming a closed-loop operation process of self-rotation feeding, variable-stroke coating, pre-pressing curing, and two-way supplementary coating. Compared with the single coating method of slurry wheel spraying and sponge wiping in the prior art, the present invention integrates the cable movement, coating action, and pressing and curing. The graphite coating composite material forms a uniform and dense coating on the surface of the cable through precise supply and multi-dimensional action, with significantly enhanced adhesion, effectively avoiding problems of peeling and cracking.

[0016] The present invention breaks through the limitation that the coating operation in the prior art cannot be continuously and precisely coordinated, and greatly improves the production efficiency through power integration and timing optimization. The equipment uses the transmission shaft driven by a double-head motor as the total power hub, and synchronously drives the winding and unwinding mechanism, the first reciprocating motion unit, the second reciprocating motion unit, and the induction heating coil, realizing the continuous operation of the whole process of feeding, coating, pre-pressing, supplementary coating, and curing. With the intermittent transmission design of the 180° dislocation of the first part of the gear and the second part of the gear, the spacing adjustment of the reciprocating pressing frame and the rotation action of the rotating frame are carried out alternately, eliminating the interference of the mechanism movement and ensuring the accurate connection of each link. The intermittent winding and unwinding of the winding and unwinding mechanism, the reciprocating coating of the coating box, the pre-curing of the pressing clamp, and the final curing of the induction heating coil are continuously arranged in space and staggered in time, without the need for additional power switching devices or manual intervention. Compared with the disadvantages of independent operation and poor coordination of each operation link in the prior art, the present invention realizes the high integration of power transmission and the precise matching of operation timing, greatly shortening the production cycle and significantly improving the large-scale production capacity of graphite coating for low-noise cables.

[0017] This invention employs a dual curing scheme of pre-curing pressing and final electromagnetic induction curing. The 304 stainless steel heat-applying surface of the pressing clamp integrates an electric heating block, which can steplessly adjust the temperature within the range of 80-120℃ to perform preliminary curing and densification treatment on the coating layer. The induction heating coil, with a 40-turn coil and a 6mm spacing design, achieves precise temperature control of 120-180℃ through electromagnetic induction heating, ensuring complete curing of the coating layer without damaging the cable substrate. The nano-anti-stick coating on the heat-applying surface of the pressing clamp and the elastic sealing sleeve of the conduit form an auxiliary optimization structure, which not only avoids coating layer adhesion but also reduces material leakage and waste. Compared with the single curing method in the prior art, the layered curing design of this invention significantly improves the structural density of the coating layer. Combined with the intermittent transmission and smooth connection of each module, the equipment operates with low impact and low noise, which not only meets the production requirements of low-noise cables but also reduces production costs through material recycling and precise coating design. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the rear-view structure of the present invention; Figure 3 This is a schematic diagram of the drive shaft and the cable to be coated according to the present invention; Figure 4 This is a schematic diagram of the structure of the gear shaft and coating box of the present invention; Figure 5 This is a schematic diagram of the structure of the gear and the rotating frame in the first part of the present invention; Figure 6 For the present invention Figure 5 A structural diagram from another perspective; Figure 7 For the present invention Figure 6 A magnified schematic diagram of the partial structure at point A in the middle; Figure 8 This is a schematic cross-sectional view of the rotating frame and torsion spring of the present invention; Figure 9 For the present invention Figure 8 A magnified schematic diagram of the local structure at point B; Figure 10 This is a schematic diagram of the crimping clamp.

[0019] The attached diagram lists the components represented by each number as follows: 1. Frame; 2. Dual-head motor; 3. Drive shaft; 4. Cable to be coated; 5. Coating box; 6. Reciprocating press frame; 7. Rotating frame; 8. Pressing clamp; 9. Connecting rod; 10. Graphite nozzle; 11. Induction heating coil; 12. Rotating frame; 13. Winding reel; 14. Belt shaft; 15. Linkage gear; 16. Gear rail; 17. Semi-annular bevel gear ring; 18. Driven bevel gear; 19. Guide tube; 20. Gear shaft; 21. Wheel axle; 22. Rotating wheel 23. Cam drive unit; 24. Guide wheel; 25. Slider; 26. Return spring; 27. Ball screw; 28. First part gear; 29. ​​Reciprocating gear; 30. Torsion spring; 31. Coupling; 32. Second part gear; 33. Intermittent gear; 34. Hollow sleeve shaft; 35. Graphite storage tank; 36. T-shaped flexible hose; 37. Material ring; 38. Main controller; 39. Conduit; 40. Synchronous shaft; 41. Arc-shaped heating surface. Detailed Implementation

[0020] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0021] The present invention provides the following preferred embodiments. like Figure 1-10 As shown, a low-noise cable processing graphite coating equipment includes a frame 1, on which a dual-head motor 2 is fixedly mounted. A transmission shaft 3 is fixedly mounted on the output shaft of the dual-head motor 2. A main controller 38 is fixedly mounted on the frame 1. The equipment also includes: The winding and unwinding mechanism enables synchronous intermittent winding and unwinding of the cable 4 to be coated and drives the cable 4 to be coated to rotate around its axis. The winding and unwinding mechanism includes a rotating frame 12 rotatably connected to the frame 1, and a first synchronous toothed belt is connected between the rotating frame 12 and the drive shaft 3. Both the rotating frame 12 and the drive shaft 3 are fixedly equipped with first pulleys that are connected to the first synchronous toothed belt; A winding wheel 13 and a belt shaft 14 are rotatably connected to the rotating frame 12, and the axes of the winding wheel 13 and the belt shaft 14 are perpendicular to the rotation axis of the rotating frame 12. Both the reel 13 and the belt shaft 14 are fixedly mounted with linkage gears 15, and the two linkage gears 15 mesh with each other. The belt shaft 14 is fixedly mounted with a driven bevel gear 18. The frame 1 is fixedly mounted with a gear rail 16 coaxially arranged with the spinning frame 12. The gear rail 16 is fixedly mounted with a semi-annular bevel gear ring 17, which meshes with the driven bevel gear 18. The arc center angle corresponding to the effective meshing arc segment on the semi-annular bevel gear ring 17 is 180°. The two ends of the cable 4 to be coated are respectively fixed on two reel 13 in two winding and unwinding mechanisms. A guide tube 19 is fixedly installed on the swivel frame 12. The axis of the guide tube 19 is on the same straight line as the axis of rotation of the swivel frame 12. After the dual-head motor 2 drives the transmission shaft 3 to rotate, it drives the rotating frame 12 to rotate synchronously through the first synchronous toothed belt. When the rotating frame 12 rotates, the driven bevel gear 18 on the belt shaft 14 meshes and drives along the semi-annular bevel gear ring 17. Since the effective meshing arc of the semi-annular bevel gear ring 17 is 180°, the driven bevel gear 18 will drive the belt shaft 14 to rotate intermittently. Then, through two meshing linkage gears 15, the winding wheel 13 is driven to rotate intermittently, thereby realizing the synchronous intermittent winding and unwinding of the cable 4 to be coated. Meanwhile, the rotation of the rotating frame 12 will drive the cable 4 to be coated to rotate around its own axis. The guide tube 19 and the cable conduit 39 are coaxially arranged, which can ensure that the cable 4 to be coated remains centered during the winding and rotation process and avoids deviation. The winding and unwinding mechanism integrates the intermittent winding and unwinding of the cable to be coated 4 with the function of rotating around the shaft. With the help of the 180° meshing design of the semi-annular bevel gear ring 17 and the driven bevel gear 18, precise intermittent transmission is achieved, which not only ensures the stable feeding of the cable to be coated 4 during the coating process, but also ensures the uniform graphite coating through the rotation of the cable to be coated 4. The first reciprocating motion unit is connected to a coating box 5 that reciprocates along the axis of the cable 4 to be coated. Both sides of the coating box 5 are connected to conduits 39 for the cable 4 to be coated to pass through. The guide tube 19 is coaxially arranged with the conduit 39. The coating box 5 contains a graphite coating composite material, which is made by mixing flake graphite powder, water-based epoxy resin binder, and polycarboxylate dispersant in a mass ratio of 75:20:5. An elastic sealing sleeve is fixed inside the conduit 39. The elastic sealing sleeve is made of fluororubber. There are 4 annular sealing lips on the inner side of the elastic sealing sleeve. The inner diameter of the annular sealing lips is 0.2mm smaller than the outer diameter of the cable 4 to be coated. It is attached to the surface of the cable 4 to be coated by elastic pre-tightening force. The first reciprocating motion unit includes a gear shaft 20 and a wheel shaft 21 rotatably connected to the frame 1. Both the gear shaft 20 and the transmission shaft 3 are fixedly mounted with linkage bevel gears. The two linkage bevel gears mesh orthogonally. A second synchronous toothed belt is connected between the wheel shaft 21 and the gear shaft 20. Both the wheel axle 21 and the gear shaft 20 are equipped with second pulleys that are connected to the second synchronous toothed belt; Two rotating wheels 22 are fixedly installed on the axle 21. Each rotating wheel 22 is provided with two cam drive parts 23 arranged in an array. Guide wheels 24 are rotatably connected to both sides of the coating box 5. The two cam drive parts 23 alternately abut against the guide wheels 24 at corresponding positions, and the transmission stroke of the two cam drive parts 23 to the guide wheels 24 is different. Slider 25 is fixedly installed on both sides of the coating box 5. Both sliders 25 are slidably connected to the frame 1. Return springs 26 are installed on the sides of both sliders 25. The other ends of the two return springs 26 are fixedly connected to the frame 1. When the drive shaft 3 rotates, it drives the gear shaft 20 to rotate through the orthogonal meshing bevel gear. The gear shaft 20 then drives the wheel shaft 21 to rotate through the second synchronous tooth belt. The two rotating wheels 22 on the wheel shaft 21 rotate synchronously. The two cam drive parts 23 on the rotating wheels 22 alternately abut against the guide wheels 24 on both sides of the coating box 5. Since the two cam drive parts 23 have different transmission strokes, in conjunction with the return spring 26 on the side of the slider 25, the coating box 5 is pushed to reciprocate along the axis of the cable 4 to be coated. Different strokes can be switched during the reciprocating process. The graphite coating compound material in the coating box 5 comes into contact with the cable 4 to be coated through the conduit 39, and completes the coating operation of the cable 4 to be coated in the reciprocating movement. The fluororubber elastic sealing sleeve in the conduit 39 is tightly attached to the surface of the cable 4 to be coated through the annular sealing lip. The design of the double cam transmission unit 23 and the return spring 26 allows the coating box 5 to move alternately and reciprocally along the axis of the cable to be coated 4 within a unit of time; Fluororubber elastic sealing sleeves effectively prevent leakage of graphite coating compound materials and can scrape off excess coating material from the surface of the cable to be coated, reducing material waste. In addition, fluororubber material has good wear resistance and high temperature resistance, which extends the service life of fluororubber elastic sealing sleeves. The second reciprocating motion unit has two reciprocating pressure frames 6 with adjustable spacing. Each of the two reciprocating pressure frames 6 is rotatably connected to a rotating frame 7. Both rotating frames 7 are driven by the transmission shaft 3 and rotate intermittently synchronously. The second reciprocating motion unit includes a ball screw 27 rotatably connected to the frame 1, and a torsion spring 30 is provided at the rotatable connection between the two. The ball screw 27 is symmetrically provided with a left-hand threaded section and a right-hand threaded section. The left-hand threaded section and the right-hand threaded section are respectively connected to two reciprocating pressure frames 6. Both reciprocating pressure frames 6 are slidably connected to the frame 1. A first gear 28 is fixedly installed on the transmission shaft 3, and a reciprocating gear 29 is fixedly installed on the ball screw 27. The first gear 28 and the reciprocating gear 29 are meshed.

[0022] The second reciprocating motion unit also includes a synchronous shaft 40 and a coupling 31 rotatably connected to the frame 1, and a third synchronous toothed belt is connected between the transmission shaft 3 and the coupling 31. Both the drive shaft 3 and the coupling 31 are equipped with third pulleys that connect to the third synchronous toothed belt; A second gear 32 is fixedly installed on the coupling 31, and an intermittent gear 33 is installed on the synchronous shaft 40. The second gear 32 and the intermittent gear 33 are meshed and connected. Hollow sleeve shafts 34 are rotatably connected to both reciprocating pressure frames 6. The hollow sleeve shafts 34 are provided with synchronous guide grooves that are open at both ends and slidably connected to the synchronous shaft 40. A fourth synchronous toothed belt is driven and connected to both hollow sleeve shafts 34. The two fourth synchronous toothed belts are driven and connected to the two rotating frames 7 respectively.

[0023] Both the rotating frame 7 and the hollow sleeve shaft 34 are equipped with a fourth pulley that is connected to the fourth synchronous toothed belt; Both the synchronous guide groove and the synchronous shaft 40 have a regular hexagonal cross section. The center angles corresponding to the effective meshing arc segments on the first gear 28 and the second gear 32 are both 70°. The effective meshing arc segments on the first gear 28 and the second gear 32 are offset by 180°.

[0024] When the drive shaft 3 rotates, it drives the first gear 28 to rotate. When the first gear 28 meshes with the reciprocating gear 29, it drives the ball screw 27 to rotate. With the help of the left-hand thread section and the right-hand thread section on the ball screw 27, the two reciprocating pressure frames 6 will move closer or further away from each other. The torsion spring 30 drives the ball screw 27 to reset in the non-meshing stage, so as to realize the reciprocating adjustable spacing of the reciprocating pressure frames 6. On the other hand, the transmission shaft 3 drives the coupling 31 to rotate through the third synchronous toothed belt. The second gear 32 on the coupling 31 meshes with the intermittent gear 33 on the synchronous shaft 40, driving the synchronous shaft 40 to rotate intermittently. Due to the regular hexagonal fit between the synchronous shaft 40 and the hollow sleeve shaft 34, the rotation of the synchronous shaft 40 is transmitted to the rotating frame 7 through the hollow sleeve shaft 34 and the fourth synchronous toothed belt, realizing the intermittent synchronous rotation of the rotating frame 7. Furthermore, the effective meshing arc segments of the first gear 28 and the second gear 32 are offset by 180°, so that the spacing adjustment of the reciprocating pressure frame 6 and the rotation of the rotating frame 7 are carried out alternately without interfering with each other; The ball screws 27 with left-hand and right-hand thread sections enable synchronous reverse spacing adjustment of the two reciprocating pressure frames 6. Combined with the sliding connection between the regular hexagonal synchronous guide groove and the synchronous shaft 40, it ensures stable power transmission during the movement of the reciprocating pressure frame 6. The intermittent transmission design of the first gear 28 and the second gear 32 not only ensures the pressing effect of the subsequent pressing clamp 8 and the coating accuracy of the graphite nozzle 10, but also reduces the impact and noise during the movement of the mechanism, significantly improving the stability and reliability of the equipment operation. Two symmetrically arranged pressing clamps 8, each pressing clamp 8 has two connecting rods 9 hinged to its top surface, and the other ends of the two connecting rods 9 are respectively hinged to two rotating frames 7; Both of the two crimping clamps 8 are provided with arc-shaped heat-coating surfaces 41 on one side of the cable 4 to be coated. Both the crimping clamps 8 and the arc-shaped heat-coating surfaces 41 are made of 304 stainless steel. The crimping clamps 8 are integrated with heating blocks. The heating temperature of the heating blocks can be steplessly adjusted within the range of 80-120℃ to adapt to the pre-curing and crimping requirements of the graphite coating composite material. The covering angle of the arc-shaped heat-coating surface 41 is 180°. The surface of the arc-shaped heat-coating surface 41 is smooth and has a nano anti-stick coating. The inner diameter of the arc-shaped heat-applying surface 41 is 0.15 mm larger than the outer diameter of the cable 4 to be coated; Two sets of graphite nozzles 10 are fixedly mounted on two rotating frames 7 respectively, and the two sets of graphite nozzles 10 are respectively set on both sides of the pressing clamp 8; A graphite supply system for supplying graphite to the graphite nozzle 10; The graphite supply system includes a graphite storage tank 35 fixed on the frame 1, a feeding pump connected to the graphite storage tank 35, a three-way hose 36 connected to the discharge port of the feeding pump, a graphite guide cavity opened in each rotating frame 7, a graphite nozzle 10 connected to the graphite guide cavity at the corresponding position, a material ring 37 rotatably connected to each graphite guide cavity, the other two ends of the three-way hose 36 are fixedly connected to two material rings 37 respectively, and the axis of the graphite nozzle 10 is perpendicular to the axis of the conduit 39. When the rotating frame 7 rotates, the connecting rod 9 drives the two pressing clamps 8 to move closer or further apart, thereby achieving the pressing and releasing of the cable 4 to be coated; The heating block inside the crimping clamp 8 is heated to a set temperature of 80-120℃, and the graphite coating layer on the surface of the cable to be coated is cured and crimped through the arc-shaped heat-coating surface 41. In the graphite supply system, the feeding pump delivers the graphite coating compound material in the graphite storage tank 35 to the two material rings 37 through the three-way hose 36, and then supplies it to the two sets of graphite nozzles 10 through the graphite guide cavity in the rotating frame 7. Since the graphite nozzles 10 are located on both sides of the pressing clamp 8 and the axis is perpendicular to the conduit 39, supplementary coating or repair can be carried out before and after coating the cable 4 to be coated. The pressing clamp 8 is made of 304 stainless steel, which has good thermal conductivity and corrosion resistance. The integrated heating block can achieve stepless adjustment from 80-120℃, which can accurately adapt to the pre-curing requirements of different graphite coating compound materials. The arc-shaped heat-applying surface 41 with a 180° central angle fits tightly against the surface of the cable 4 to be coated. Combined with the nano anti-stick coating on the surface, it not only ensures the pressing effect but also prevents the graphite coating layer from sticking to the clamp, ensuring a smooth coating surface. The graphite supply system achieves a continuous and stable supply of graphite during the rotation of the rotating frame 7 by rotating the material ring 37 and the graphite guide cavity inside the frame 7. Two sets of graphite nozzles 10 are respectively set on both sides of the pressing clamp 8, forming a continuous operation process of coating, curing pressing, and re-coating, which greatly improves the thickness uniformity and adhesion of the graphite coating layer. At the same time, the design of the graphite nozzle 10 axis perpendicular to the conduit 39 reduces coating dead angles and further ensures coating quality. An induction heating coil 11 is fixed on the frame 1 and used for heating and curing graphite.

[0025] The induction heating coil 11 adopts electromagnetic induction heating method, with 40 turns. The distance between the induction heating coil 11 and the cable 4 to be coated is 6mm. The temperature of the curing area is monitored in real time by a temperature sensor to achieve precise temperature control within the range of 120-180℃, ensuring that the graphite coating composite material is completely cured without damaging the substrate of the cable 4 to be coated. The temperature sensor is fixed on the frame 1 and used in conjunction with the induction heating coil 11; After being pre-cured and pressed by the pressing clamp 8, the cable 4 to be coated passes through the induction heating coil 11. The induction heating coil 11 heats the graphite coating layer on the surface of the cable 4 to be coated by electromagnetic induction heating. The temperature sensor monitors the temperature of the curing area in real time and feeds the data back to the main controller 38 to achieve precise temperature control within the range of 120-180℃, ensuring that the graphite coating compound is completely cured. Compared with traditional resistance heating, electromagnetic induction heating has higher heating efficiency, lower energy consumption, and more uniform heating, which can effectively avoid local overheating and damage to the substrate of the cable to be coated. The design of 40-turn coils and 6mm spacing ensures the stability of heating intensity. The precise temperature control range of 120-180℃ ensures that the graphite coating compound material is completely cured to form a dense and stable coating layer, while preventing the performance of the substrate of the cable to be coated from deteriorating due to excessive temperature. This significantly improves the product quality and service life of the low-noise coated cable.

[0026] The drive shaft 3 serves as the main power hub, simultaneously driving the intermittent rotation of the winding and unwinding mechanism, the variable stroke reciprocating motion of the first reciprocating motion unit, and the spacing adjustment of the second reciprocating motion unit and the intermittent rotation of the rotating frame 7. While the winding and unwinding mechanism intermittently feeds and rotates the cable 4 to be coated, the coating box 5 performs reciprocating coating to ensure that the graphite liquid is evenly coated on the entire circumferential surface of the cable 4 to be coated. Immediately afterwards, the two reciprocating press frames 6 in the second reciprocating motion unit approach each other under the drive of the ball screw 27, and their rotating frame 7 stops rotating under the drive of the intermittent gear 33, so that the pressing clamp 8 is precisely closed through the linkage 9 mechanism to heat and pre-press the coating layer. After the pressing action is completed, the reciprocating pressing frame 6 begins to retract, and the rotating frame 7 begins to rotate intermittently, driving the graphite mold base on it to rotate to a new angle. During the reciprocating pressing frame 6 retraction process, the wire is coated with liquid to repair any slight unevenness that may be caused by the pressing. After that, the coated cable enters the area of ​​the induction heating coil 11 for final curing. This cycle of feeding, coating, pre-pressing, pressing, recoating, and curing is continuous in space and staggered in time. The 180° misaligned meshing design of the first gear 28 and the second gear 32 ensures that the two key actions of the reciprocating press frame 6 moving and the rotating frame 7 rotating will never occur simultaneously, fundamentally eliminating mechanical interference and power conflict. The entire system is coordinated by the main controller 38.

[0027] The specific steps for using this invention are as follows: Dual-head motor 2 drives transmission shaft 3 to rotate. Transmission shaft 3 serves as the main power hub, synchronously driving each module to work together. The winding and unwinding mechanism drives the rotating frame 12 to rotate through the first synchronous toothed belt. The semi-annular bevel gear ring 17 and the driven bevel gear 18 mesh at 180° to achieve synchronous intermittent winding and unwinding of the cable 4 to be coated. At the same time, the rotating frame 12 rotates to drive the cable 4 to be coated to rotate around its own axis. The guide tube 19 ensures that the cable 4 to be coated is always centered. The first reciprocating motion unit transmits power through the linkage bevel gear and the second synchronous toothed belt. The double cam transmission part 23 on the wheel axle 21, in conjunction with the return spring 26, pushes the coating box 5 to move alternately and reciprocally along the cable axis. The graphite compound material in the coating box 5 contacts the cable 4 to be coated through the fluororubber elastic sealing sleeve in the conduit 39 to complete the coating. At the same time, the sealing sleeve scrapes off the excess material. In the second reciprocating motion unit, the transmission shaft 3 drives the ball screw 27 to rotate via the first gear 28, causing the two reciprocating pressure frames 6 to adjust their spacing synchronously in opposite directions along the left-hand and right-hand thread sections. On the other hand, the transmission shaft 3 drives the synchronous shaft 40 to rotate intermittently via the third synchronous toothed belt, the second gear 32, and the intermittent gear 33. The rotating frame 7 is driven to rotate intermittently via the hollow sleeve shaft 34 with a regular hexagonal fit and the fourth synchronous toothed belt. The 180° misalignment design of the first gear 28 and the second gear 32 ensures that the adjustment of the reciprocating pressure frame 6 and the rotation of the rotating frame 7 alternate. The rotating frame 7 drives the pressing clamp 8 with a built-in electric heating block via the connecting rod 9 to pre-cur and press the cable coating layer. The graphite nozzles 10 on both sides are supplemented or trimmed before and after coating through the graphite supply system. Finally, the cable 4 to be coated passes through the induction heating coil 11 to complete the final curing. The whole process is coordinated by the main controller 38 to realize continuous and staggered operations of feeding, coating, pre-pressing, re-coating, and curing, ensuring that the graphite coating layer is uniform, dense, and has strong adhesion.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low-noise cable processing graphite coating apparatus comprising a frame (1) on which a double-head motor (2) is mounted, a transmission shaft (3) being mounted on the output shaft of the double-head motor (2), characterized in that, Also includes: The winding and unwinding mechanism enables the synchronous intermittent winding and unwinding of the cable to be coated (4) and drives the cable to be coated (4) to rotate around its axis. The first reciprocating motion unit is connected to a coating box (5) that reciprocates along the axis of the cable (4) to be coated. Both sides of the coating box (5) are connected to conduits (39) for the cable (4) to be coated to pass through. The second reciprocating motion unit is connected to two reciprocating pressure frames (6) with adjustable spacing. Each of the two reciprocating pressure frames (6) is rotatably connected to a rotating frame (7). Both rotating frames (7) are driven by a transmission shaft (3) and rotate intermittently synchronously. Two symmetrically arranged pressing clamps (8), each pressing clamp (8) has two connecting rods (9) hinged to its top surface, and the other ends of the two connecting rods (9) are respectively hinged to two rotating frames (7); Two sets of graphite nozzles (10) are fixedly mounted on two rotating frames (7), and the two sets of graphite nozzles (10) are respectively set on both sides of the pressing clamp (8); A graphite supply system for supplying graphite to the graphite nozzle (10); An induction heating coil (11) is fixed on the frame (1) and used for heating and curing graphite.

2. A low noise cable processing graphite coating apparatus according to claim 1, wherein The winding and unwinding mechanism includes a winding frame (12) rotatably connected to the frame (1). A first synchronous toothed belt is connected between the winding frame (12) and the drive shaft (3). A winding wheel (13) and a belt shaft (14) are rotatably connected to the winding frame (12). A linkage gear (15) is fixedly installed on both the winding wheel (13) and the belt shaft (14). The two linkage gears (15) mesh with each other. A driven bevel gear (18) is fixedly installed on the belt shaft (14). A coupling gear (18) is fixedly installed on the frame (1) to engage with the winding frame (12). The toothed rail (16) is coaxially arranged, and a semi-annular bevel gear (17) is fixedly mounted on the toothed rail (16). The semi-annular bevel gear (17) meshes with the driven bevel gear (18). The arc center angle corresponding to the effective meshing arc segment on the semi-annular bevel gear (17) is 180°. The two ends of the cable to be coated (4) are respectively fixedly mounted on two winding wheels (13) in two winding and unwinding mechanisms. A guide tube (19) is fixedly mounted on the swivel frame (12). The guide tube (19) is coaxially arranged with the conduit (39).

3. The low noise cable processing graphite coating apparatus of claim 1, wherein The first reciprocating motion unit includes a gear shaft (20) and a wheel shaft (21) rotatably connected to the frame (1). Both the gear shaft (20) and the transmission shaft (3) are fixedly mounted with linkage bevel gears, which mesh orthogonally. A second synchronous toothed belt drives between the wheel shaft (21) and the gear shaft (20). Two rotating wheels (22) are fixedly mounted on the wheel shaft (21), and each rotating wheel (22) has two cam drive units (23) arranged in an array. Both sides of the coating box (5) are... The guide wheel (24) is rotatably connected. The two cam transmission parts (23) alternately abut against the guide wheel (24) at the corresponding positions. The transmission stroke of the two cam transmission parts (23) to the guide wheel (24) is different. The two sides of the coating box (5) are fixedly installed with sliders (25). The two sliders (25) are slidably connected to the frame (1). The sides of the two sliders (25) are installed with return springs (26). The other ends of the two return springs (26) are fixedly connected to the frame (1).

4. A low noise cable processing graphite coating apparatus according to claim 3, wherein The second reciprocating motion unit includes a ball screw (27) rotatably connected to the frame (1), and a torsion spring (30) is provided at the rotatable connection between the two. The ball screw (27) is symmetrically provided with a left-hand thread section and a right-hand thread section. The left-hand thread section and the right-hand thread section are respectively connected to two reciprocating pressure frames (6). Both reciprocating pressure frames (6) are slidably connected to the frame (1). A first part gear (28) is fixedly installed on the transmission shaft (3). A reciprocating gear (29) is fixedly installed on the ball screw (27). The first part gear (28) meshes with the reciprocating gear (29).

5. The low-noise cable processing graphite coating equipment according to claim 4, characterized in that, The second reciprocating motion unit also includes a synchronous shaft (40) and a coupling (31) rotatably connected to the frame (1). A third synchronous toothed belt is connected between the transmission shaft (3) and the coupling (31). A second gear (32) is fixedly installed on the coupling (31). An intermittent gear (33) is installed on the synchronous shaft (40). The second gear (32) meshes with the intermittent gear (33). Hollow sleeve shafts (34) are rotatably connected to both reciprocating pressure frames (6). A synchronous guide groove with open ends and slidably connected to the synchronous shaft (40) is opened on the hollow sleeve shaft (34). A fourth synchronous toothed belt is connected to both hollow sleeve shafts (34). The two fourth synchronous toothed belts are respectively connected to the two rotating frames (7).

6. The low-noise cable processing graphite coating equipment according to claim 5, characterized in that, The cross-sections of the synchronous guide groove and the synchronous shaft (40) are both regular hexagons. The center angles corresponding to the effective meshing arc segments on the first part gear (28) and the second part gear (32) are both 70°. The effective meshing arc segments on the first part gear (28) and the second part gear (32) are offset by 180°.

7. The low-noise cable processing graphite coating equipment according to claim 1, characterized in that, Both of the two crimping clamps (8) are provided with an arc-shaped heat-coating surface (41) on one side of the cable (4) to be coated. Both the crimping clamps (8) and the arc-shaped heat-coating surface (41) are made of 304 stainless steel. The crimping clamps (8) have an integrated heating block. The arc-shaped heat-coating surface (41) has a coverage angle of 180° and a smooth surface with a nano anti-stick coating.

8. The low-noise cable processing graphite coating equipment according to claim 1, characterized in that, The graphite supply system includes a graphite storage tank (35) fixed on the frame (1), a feeding pump connected to the graphite storage tank (35), a three-way hose (36) connected to the discharge port of the feeding pump, a graphite guide cavity opened in each rotating frame (7), a graphite nozzle (10) connected to the graphite guide cavity at the corresponding position, a material ring (37) rotatably connected to each graphite guide cavity, and the other two ends of the three-way hose (36) fixedly connected to two material rings (37) respectively.

9. The low-noise cable processing graphite coating equipment according to claim 1, characterized in that, The main controller (38) is fixedly installed on the frame (1), and the axis of the graphite nozzle (10) is perpendicular to the axis of the conduit (39).

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