A submarine cable insulation material extrusion device

Abstract

The present invention relates to the technical field of extrusion devices, and discloses an extrusion device for submarine cable insulation material, which comprises three major parts: an extrusion mechanism, a cooling and solidification chamber, and a pretreatment chamber; a rotatable drive ring frame is provided in the pretreatment chamber, and four groups of retractable contact mechanisms are symmetrically arranged on the front and rear sides thereof, and a centrally symmetrical telescopic transmission group is provided between adjacent mechanisms; the outstanding features of the present invention are: the contact mechanism is driven to extend and retract in a coordinated manner by obliquely symmetrical coordinated gears, so as to realize alternating contact of the conductor surface; the angle adjustment device drives the drive ring frame to rotate, so that the polishing part completes full coverage polishing of the conductor; in the preheating mode, the coordinated gear reverse switching function group cooperates with the ring frame rotation to realize uniform preheating; the design realizes the intelligent switching between conductor surface cleaning and preheating, significantly improves the material adhesion performance through coordinated control, and solves the technical problems of low efficiency and uneven effect of traditional pretreatment process.

Description

Technical Field

[0001] The present invention relates to the technical field of extrusion devices, and more particularly to an extrusion device for submarine cable insulation materials. Background Art

[0002] As a key infrastructure connecting power and information transmission across sea areas, the long-term operational reliability of submarine cables is of vital importance. The insulation layer of the cable is directly related to the core performance of the cable and must meet a series of stringent requirements in extreme marine environments.

[0003] At present, cross-linked polyethylene (XLPE) has become the mainstream material for submarine cable insulation due to its excellent electrical, mechanical and heat-resistant properties; the core process of composite coating of XLPE and other insulating materials on the surface of conductors (such as copper wires or aluminum wires) is extrusion molding; for example, the Chinese invention patent with announcement number CN118003588B discloses a plastic insulated cable extrusion device and method; the device includes a tubular frame, a conductor punching and centering device, a punching power system and an insulation material extrusion system; its core design is to set a centering cone surface in the tubular frame, pass a conductive metal wire (conductor), and use a conductor punching and centering device (compatible with the centering cone surface) and a number of punching rods mounted on the conductor to operate under the drive of the power system, aiming to prevent the insulation layer from being damaged during the subsequent laying process, thereby extending the life of the conductor.

[0004] The shortcomings of the existing technology are: The design focus of the existing extrusion device represented by CN118003588B is mainly concentrated on the extrusion molding process itself and the subsequent insulation layer protection structure (such as punching design), and lacks effective integration and coordinated control of the conductor surface cleaning and preheating links; specifically, the existing device usually does not integrate an efficient online cleaning unit and a precisely controllable preheating system, or fails to achieve seamless coordination of cleaning and preheating in the process connection; the lack or imperfection of this pretreatment link directly leads to poor physical bonding (wetting, diffusion) and chemical bonding (adhesion) between the molten insulating material and the conductor surface, reduced interface bonding strength, and increased microscopic interface defects; ultimately, it seriously affects the adhesion and interface integrity between the insulation layer and the conductor. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a submarine cable insulation material extrusion device to solve the problem existing in the above-mentioned background technology of how to effectively coordinate and integrate the conductor surface cleaning and preheating and pretreatment links in the submarine cable conductor insulation extrusion process, so as to solve the problem of poor adhesion between the insulation layer and the conductor interface caused by the lack of this link.

[0006] The present invention provides the following technical solution: a submarine cable insulation material extrusion device, comprising an extrusion mechanism through which a conductor passes, a cooling and curing chamber installed on one side of the extrusion mechanism, and a pretreatment chamber docked on the other side; a rotatable drive ring frame disposed within the pretreatment chamber, with four sets of mirror-symmetrical retractable contact mechanisms disposed on the front and rear sides of the drive ring frame, and two sets of telescopic transmission groups arranged symmetrically with the conductor as the center of symmetry disposed between two adjacent sets of retractable contact mechanisms distributed along the circumference;

[0007] Taking the central axis inclined 45 degrees from the lower left to the upper right of the driving ring frame as a reference, the two groups of retractable contact mechanisms in the upper left and the two groups of retractable contact mechanisms in the lower right form a mirror symmetry; the two adjacent groups of retractable contact mechanisms in the same direction form a mirror layout with the axis inclined 45 degrees from the upper left to the lower right of the driving ring frame as a secondary symmetry reference; each group of retractable contact mechanisms includes a supporting main arm beam, which adopts an L-shaped structure integrally formed of a long handle and a short handle. The long handle is rigidly connected to the side wall of the driving ring frame, and a receiving groove is provided in the short handle. The telescopic arm is slidably sleeved in the receiving groove. The inner ends of the two groups of telescopic arms arranged opposite to each other on the same side of the driving ring frame are detachably installed with polishing parts, and the inner ends of the other two groups of telescopic arms arranged opposite to each other are detachably installed with heating parts.

[0008] Two sets of oppositely distributed polishing parts constitute a cleaning group; the other two sets of oppositely distributed heating parts constitute a heating group, the polishing part adopts a grinding part structure, and the heating part adopts a heating part structure; the telescopic transmission group includes cooperative gears; the cooperative gears are clamped between the two adjacent sets of retractable contact mechanisms and mesh with the telescopic arms, and the cooperative gears located on the front and rear sides of the drive ring frame are rigidly connected through a transmission shaft.

[0009] Furthermore, the polishing part structure consists of a polishing base, a friction block, a spring and an air nozzle: at least three friction blocks are arranged at the bottom of the polishing base, the middle friction block is rigidly fixed to the polishing base, the outer ends of the friction blocks on both sides are hinged to the polishing base and the movable ends are elastically connected to the inner cavity of the polishing base through springs; when the polishing part does not contact the conductor, the elastic reset force of the spring causes the friction block to open the bottom wall channel of the polishing base; the air nozzles are arranged in a matrix form in the top cavity of the polishing base.

[0010] Furthermore, the grinding part structure also includes a triangular guide plate and a side guide plate; the triangular guide plate rigidly connects the middle friction block and the air nozzle, and the side guide plate fits the spring at an inclined angle and is oriented toward the channel on the bottom wall of the grinding base; the two extend horizontally along the inner cavity of the grinding base.

[0011] Furthermore, the friction blocks on both sides can form a smooth curved surface with the original friction block in the middle of the bottom wall of the grinding base after the spring is compressed, forming a tightly fitting arc-shaped friction layer.

[0012] Furthermore, the heating element structure may be selected as a contact heater.

[0013] Furthermore, a driving mechanism is also provided in the pretreatment chamber, and the driving mechanism consists of a central gear, a driven gear, a power input gear, a first reversible motor and a rotating bracket, wherein a through-hole is provided in the center of the central gear, and a driven gear is installed at the end of each transmission shaft on both sides of its symmetry center, and the two driven gears are meshed with the central gear and maintain a central symmetrical layout; the outer periphery of the central gear is also meshed with a power input gear independent of the driven gear, and the gear is rigidly connected to the output shaft of the first reversible motor through a coupling, and the base of the first reversible motor is fixed on the rotating bracket; the rotating bracket is rigidly connected to the driving ring frame through two wings, and its ring frame is rotatably assembled on the side wall of the pretreatment chamber.

[0014] Furthermore, the pretreatment chamber is composed of a main chamber body, a convex ring chamber and a support seat. The convex ring chambers are welded at both ends of the main chamber body and their inner diameters are compatible with the rotational movement of the transmission shaft and the drive mechanism. A support seat is provided at the end of the main chamber body away from the extrusion mechanism, and the center gear tail pipe is rotatably connected to the support seat through a bearing.

[0015] Furthermore, the surfaces of the support seat and the main cabin body close to the extrusion mechanism end are both provided with arc-shaped openings.

[0016] Furthermore, the driving ring frame adopts an integrally formed structure of a gear ring and limiting side plates on both sides, and the limiting side plates are embedded in the annular grooves on the inner wall of the main cabin body by sliding and snapping; at the same time, a skylight structure is provided on the top wall of the main cabin body; an axle seat is also welded on the inner side of the gear ring, and the transmission shaft is rotatably installed in the axle seat.

[0017] Furthermore, an angle adjustment device for driving the ring frame to rotate is provided on the top of the pretreatment chamber, and its rotation stroke is limited to 180 degrees in both directions.

[0018] Technical effects and advantages of the present invention:

[0019] The present invention drives two groups of retractable contact mechanisms to perform linked extension and retraction through the same-direction rotation of obliquely symmetrically arranged cooperative gears, thereby realizing alternating contact and withdrawal of the polishing part / heating part on the conductor surface; the angle adjustment device drives the driving ring frame to drive the retractable contact mechanism telescopic transmission group to rotate, so that the polishing part completes full coverage polishing of the conductor surface, ensuring uniform removal of the oxide layer and rust; in the preheating mode, the cooperative gear rotates counterclockwise to switch to the heating part as the functional group, and cooperates with the continuous rotation of the driving ring frame to realize uniform circumferential preheating of the conductor; this design automatically switches between efficient cleaning and preheating of the conductor through the coordinated control of the cooperative gear and the driving ring frame, significantly improving the adhesion performance of subsequent extruded materials, and realizing intelligent switching and precise control of the conductor pretreatment process.

[0020] The present invention forms an arc-shaped friction layer through the elastic cooperation of the friction block and the spring, thereby achieving full-coverage mechanical grinding of the oxide layer and rust on the surface of the conductor; when switching to the preheating mode, the friction block resets to open the bottom wall channel of the grinding base, and the air nozzle restarts the air pumping function. The high-pressure air flow is sprayed through the triangular guide plate and the side guide plate slits to complete the final cleaning, effectively removing the grinding residue; this design further increases the auxiliary cleaning of the conductor in the preheating stage, effectively removing the metal debris and dust remaining from the grinding, and creating a good environment for heat treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the overall structure of the present invention and its partial dissection.

[0023] Figure 3 It is a schematic structural diagram of the extrusion mechanism of the present invention.

[0024] Figure 4 For the present invention Figure 2 Schematic diagram of the pretreatment chamber and its internal connection structure.

[0025] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point A in the middle.

[0026] Figure 6 Schematic diagram of the driving mechanism structure of the present invention.

[0027] Figure 7 It is a schematic diagram of the connection structure of the driving ring frame, retractable contact mechanism and telescopic transmission group of the present invention.

[0028] Figure 8 For the present invention Figure 7 Schematic diagram of the structure at point B.

[0029] Figure 9 For the present invention Figure 7 Right side view of the structure.

[0030] Figure 10 For the present invention Figure 9 Schematic diagram of the remaining structure after removing the telescopic transmission group.

[0031] Figure 11 For the present invention Figure 10 Schematic diagram of the structure at point C in the middle.

[0032] The accompanying drawings are marked as follows: 1. Extrusion mechanism; 11. Main frame; 12. Injector; 13. Discharge head; 14. Wiring access window; 2. Cooling and curing chamber; 3. Pretreatment chamber; 31. Main chamber; 32. Convex ring chamber; 33. Support seat; 4. Drive ring frame; 41. Gear ring; 42. Limiting side plate; 43. Shaft seat; 5. Retractable contact mechanism; 51. Support main arm beam; 52. Telescopic arm; 53. Polishing part; 531. Polishing base; 532. Friction block; 53 3. Spring; 534. Air nozzle; 535. Triangular guide plate; 536. Side guide plate; 54. Heating unit; 6. Telescopic transmission group; 61. Cooperative gear; 62. Transmission shaft; 7. Driving mechanism; 71. Center gear; 72. Driven gear; 73. Power input gear; 74. First reversible motor; 75. Rotating bracket; 8. Angle adjustment device; 81. Driving gear; 82. Rotating shaft; 83. Protective cover shell; 84. Second reversible motor; 9. Base frame. DETAILED DESCRIPTION

[0033] The technical solutions of the present invention will be described clearly and completely below with reference to the accompanying drawings. Furthermore, the various structural forms described in the following embodiments are merely illustrative. The submarine cable insulation material extrusion device of the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by persons of ordinary skill in the art without creative effort fall within the scope of protection of the present invention.

[0034] Reference Figure 1-Figure 2 The present invention provides an extrusion device for submarine cable insulation material, comprising an extrusion mechanism 1 through which a conductor can pass, a cooling and curing chamber 2 being installed on one side of the extrusion mechanism 1, and a pretreatment chamber 3 being docked on the other side; a rotatable drive ring frame 4 is provided inside the pretreatment chamber 3, and four groups of mirror-symmetrical retractable contact mechanisms 5 are respectively arranged on the front and rear sides of the drive ring frame 4, and two groups of telescopic transmission groups 6 are arranged symmetrically with the conductor as the center of symmetry between two adjacent groups of retractable contact mechanisms 5 distributed along the circumferential direction.

[0035] In this embodiment, it should be noted that Figure 3 The extrusion mechanism 1 consists of a main frame 11, a syringe 12, a discharge head 13 and a wiring inspection window 14. One end of the main frame 11 is detachably connected to the cooling and curing chamber 2 by bolts. The syringe 12 is fixedly mounted on the top of the main frame 11. The top of the syringe 12 is connected to the material supply source. The discharge head 13 is fixedly connected to the feeding end at the bottom of the syringe 12 and is concentrically arranged with the main frame 11. The left and right side walls of the main frame 11 are provided with windows for operators to connect wires, and a wiring inspection window 14 is hingedly installed on the window.

[0036] A cooling system may be configured inside the cooling and curing chamber 2 to cool and cure the conductor covered with insulating material;

[0037] A pay-off device is installed outside the pre-treatment chamber 3 at the end away from the extrusion mechanism 1. It mainly consists of a frame and base support structure, a pay-off reel unit with a bearing connection cylinder and a quick-release shaft, and a power and transmission system including a motor / gear set / magnetic coupler. The tension control and brake unit work together to ensure continuous and stable cable release without loosening or knotting.

[0038] The cooling and curing chamber 2 is provided with a traction device on the outside of the end away from the extrusion mechanism 1, such as a take-up device arranged opposite to the pay-off device. Its main structure including the frame / transmission system / brake unit is basically the same as the pay-off device. The core difference is that the take-up drum unit is integrated with a detachable traction rope that is connected to the conductor through a quick connector; the hydraulic clamping end of the traction device passes through the cooling and curing chamber 2 and is coaxially positioned and locked with the discharge head 13. After the conductor's movable end is fixed, it is driven by a servo motor to achieve step-by-step traction movement;

[0039] The bottom of the pretreatment chamber 3 is supported by a rigidly connected chassis 9 to ensure the structural stability of the equipment during operation;

[0040] In this article, all the positional relationships we discuss about front, back, left, and right are based on Figure 1-Figure 2 These directions are defined by the perspective presented. They have no actual geographical or physical meaning. They are merely a reference framework to help readers understand the content of the article more intuitively. In this way, we can more clearly show the relative position relationship between the various parts, making the entire discussion process easier to understand and follow. Please note that this custom direction identification is only for internal use in this article and does not represent any absolute direction or position in the real world.

[0041] Reference Figure 2 、 Figure 4-11 , taking the central axis inclined 45 degrees from the lower left to the upper right of the driving ring frame 4 as a reference, the two groups of retractable contact mechanisms 5 on the upper left and the two groups of retractable contact mechanisms 5 on the lower right form a mirror symmetry; the two adjacent groups of retractable contact mechanisms 5 in the same direction form a mirror layout with the axis inclined 45 degrees from the upper left to the lower right of the driving ring frame 4 as a secondary symmetry reference; each group of retractable contact mechanisms 5 includes a supporting main arm beam 51, wherein the supporting main arm beam 51 adopts an L-shaped structure integrally formed with a long handle and a short handle, wherein the long handle is rigidly connected to the side wall of the driving ring frame 4, and a receiving groove is provided in the short handle, and a telescopic arm 52 is slidably sleeved in the receiving groove, and the inner ends of the two groups of oppositely arranged telescopic arms 52 on the same side of the driving ring frame 4 are detachably installed with a polishing part 53, and the inner ends of the other two groups of oppositely arranged telescopic arms 52 are detachably installed with a heating part 54; for example, a detachable method such as a snap-on type or a bolt-fixed type;

[0042] Two sets of oppositely distributed polishing parts 53 constitute a cleaning group, which is responsible for cleaning the conductor surface; two sets of oppositely distributed heating parts 54 constitute a heating group, which is responsible for preheating the conductor surface; the polishing parts 53 of the cleaning group adopt a grinding element structure, and the heating parts 54 of the heating group adopt a heating element structure;

[0043] A telescopic transmission group 6 is mounted on the drive ring frame 4 to drive each set of retractable contact mechanisms 5. The telescopic transmission group 6 consists of a cooperating gear 61 and a transmission shaft 62. The cooperating gear 61 is sandwiched between two adjacent sets of retractable contact mechanisms 5 and meshes with the telescopic arm 52. The cooperating gears 61 located on the front and rear sides of the drive ring frame 4 are rigidly connected coaxially via a transmission shaft 62, and the transmission shaft 62 is rotatably mounted on the drive ring frame 4. This allows the retractable contact mechanisms 5 and the telescopic transmission group 6 to rotate circumferentially along the inner cavity of the pretreatment chamber 3 as the drive ring frame 4 drives them. At the same time, the cooperating gear 61 can drive the telescopic arm 52 to move telescopically, so that the polishing portion 53 / heating portion 54 can alternately switch between contacting and withdrawing from the conductor surface.

[0044] In this embodiment, it should be noted that the "same position" in this application specifically refers to the upper left or lower right position on the same side of the drive ring frame 4. Specifically, two adjacent groups of retractable contact mechanisms 5 in the same position refer to two retractable contact mechanisms 5 that are in contact with the same cooperative gear 61 on the same side. Figure 9 ;

[0045] To optimize the auxiliary cleaning effect during the conductor preheating stage and effectively remove metal debris and dust remaining from grinding, the polishing section 53 of the cleaning group, i.e., the polishing component structure, consists of a grinding base 531, friction blocks 532, springs 533, and air nozzles 534. At least three friction blocks 532 are configured at the bottom of the grinding base 531. The middle friction block 532 is rigidly fixed to the grinding base 531. The outer ends of the friction blocks 532 on both sides are hinged to the grinding base 531, and the movable ends are elastically connected to the inner cavity of the grinding base 531 via springs 533. When the polishing section 53 is not in contact with the conductor, the elastic restoring force of the springs 533 causes the friction blocks 532 to open the bottom wall channel of the grinding base 531. The air nozzles 534 are arranged in a matrix in the top cavity of the grinding base 531.

[0046] The polishing member structure also includes a triangular guide plate 535 and a side guide plate 536. The triangular guide plate 535 rigidly connects the central friction block 532 and the air nozzle 534. The side guide plate 536 is inclined to fit the spring 533 and is oriented toward the channel on the bottom wall of the polishing base 531. The two guide plates extend horizontally along the inner cavity of the polishing base 531, forming a narrow slit to provide air flow guidance for the air nozzle 534. The side guide plates 536 also linearly constrain the elastic expansion and contraction of the spring 533 to prevent bending deformation.

[0047] The friction blocks 532 on both sides can form a smooth curved surface with the original friction block 532 in the middle of the bottom wall of the polishing base 531 after compressing the spring 533, forming a tightly fitting arc-shaped friction layer;

[0048] The heating unit 54 responsible for the heating group, i.e. the heating element structure, can be selected as a contact heater;

[0049] The two side walls of the polishing part 53 / heating part 54 are recessed inwards to ensure that they maintain a non-interference state with the cooperative gear 61 when they move along the receiving groove of the supporting main arm beam 51. Figure 9 ;

[0050] In order to drive the two coordinated gears 61 arranged obliquely with the conductor symmetry center to rotate in the same direction, a driving mechanism 7 is also provided in the pretreatment chamber 3. The driving mechanism 7 consists of a central gear 71, a driven gear 72, a power input gear 73, a first reversible motor 74 and a rotating bracket 75. The central gear 71 is provided with a through hole in the center, and a driven gear 72 is installed at the end of the transmission shaft 62 on both sides of the symmetry center. The two driven gears 72 are meshed with the central gear 71 and maintain a central symmetric layout; the outer periphery of the central gear 71 is meshed with another driven gear 72 that is independent of the driven gears. The power input gear 73 of the movable gear 72 is rigidly connected to the output shaft of the first reversible motor 74 through a coupling. The base of the first reversible motor 74 is fixed on the rotating bracket 75; the rotating bracket 75 is rigidly connected to the driving ring frame 4 through two wings, and the ring frame is rotatably assembled on the side wall of the pretreatment chamber 3, so that when the driving ring frame 4 drives the retractable contact mechanism 5, the telescopic transmission group 6 and the driving mechanism 7 to rotate as a whole, the driving mechanism 7 can still independently control the driving action of the telescopic transmission group 6; this design ensures that the motion transmission and the structural rotation do not interfere with each other. Figure 6 When in use, the center gear 71 receives the transmission force from the power input gear 73, driving the two driven gears 72 on both sides of the center symmetrically distributed to achieve synchronous rotation, thereby driving the two coordinated gears 61 to complete the same direction linkage action;

[0051] In order to adapt to the driving ring frame 4 to drive the retractable contact mechanism 5, the telescopic transmission group 6 and the driving mechanism 7 to rotate as a whole, and to be relatively isolated from the outside world, the configuration of the pretreatment chamber 3 needs to be further optimized. The pretreatment chamber 3 is composed of a main chamber body 31, a convex ring chamber 32 and a support seat 33. The convex ring chambers 32 are welded at both ends of the main chamber body 31, and the inner diameter thereof is compatible with the rotational movement of the transmission shaft 62 and the driving mechanism 7. A support seat 33 is provided at the end of the main chamber body 31 away from the extrusion mechanism 1, and the tail pipe of the central gear 71 is rotatably connected to the support seat 33 through a bearing, providing it with an effective rotation support point, so that the driving mechanism 7 can rotate as a whole with the driving ring frame 4, while retaining the relative transmission performance of its internal components;

[0052] The surfaces of the support base 33 and the main cabin 31 near the extrusion mechanism 1 are both provided with arc-shaped openings to ensure that the wiring harness has the necessary margin of movement when the driving ring frame 4, the retractable contact mechanism 5, the telescopic transmission group 6 and the driving mechanism 7 rotate in coordination;

[0053] The drive ring frame 4 is an integrally formed structure of a gear ring 41 and two limiting side plates 42 on both sides. The limiting side plates 42 are inserted into the annular grooves on the inner wall of the main cabin 31 by sliding engagement, thereby achieving circumferential positioning and rotation. At the same time, a skylight structure is provided on the top wall of the main cabin 31 to provide operating space for the transmission intervention of the angle adjustment device 8. A shaft seat 43 is also welded to the inner side of the gear ring 41, and the transmission shaft 62 is rotatably mounted in the shaft seat 43.

[0054] An angle adjustment device 8 is provided on the top of the pretreatment chamber 3 to drive the driving ring frame 4 to rotate, and its rotation stroke is limited to 180 degrees in both directions; the angle adjustment device 8 is composed of a driving gear 81, a rotating shaft 82, a protective cover shell 83 and a second reversible motor 84. The protective cover shell 83 covers the skylight and forms a meshing transmission with the driving gear 81. The center of the driving gear 81 is fixedly connected to the rotating shaft 82, which passes through the side wall of the protective cover shell 83 and is linked to the output shaft of the second reversible motor 84 for assembly.

[0055] Working principle of the present invention:

[0056] During operation, the pay-off device is first activated to release a conductor, such as a copper or aluminum wire. The conductor passes from the support base 33 through the pretreatment chamber 3 and into the main frame 11. The operator manually opens the wiring inspection window 14 to guide the conductor through the discharge head 13. Simultaneously, the clamping end of the traction device passes through the cooling and curing chamber 2 and coaxially docks with the discharge head 13, completing the fixing of the conductor's movable end. The traction device then drives the conductor to move in a step-by-step manner, passing through the pretreatment chamber 3, the extrusion mechanism 1, and the cooling and curing chamber 2 in sequence, respectively performing the surface pretreatment, insulation material extrusion coating, and cooling and molding processes.

[0057] After the conductor's movable end is fixed, the traction device starts the intermittent traction mode, and its downtime interval must cover the conductor surface pretreatment single cycle period; during this waiting period, the driving mechanism 7 drives the two coordinated gears 61 arranged obliquely with the conductor as the symmetrical center to rotate in the same direction: the upper left / lower right coordinated gears 61 both rotate clockwise, respectively driving the two groups of retractable contact mechanisms 5 meshed with them to perform a linked telescopic action - the telescopic arms 52 of the cleaning group arranged vertically opposite to each other carry the polishing part 53 to press down to contact the conductor surface, and the telescopic arms 52 of the heating group arranged horizontally opposite to each other retract into the receiving groove supporting the main arm beam 51 and drive the heating part 54 to move outward (see Figure 9 When the polishing part 53 of the cleaning group approaches the conductor, the friction blocks 532 hinged on both sides of the bottom wall of the polishing base 531 compress the spring 533 inward, and finally form a smooth curved surface together with the original friction block 532 in the middle of the bottom wall of the polishing base 531, forming a tightly fitting arc-shaped friction layer. Figure 10-11 During this period, the pressure sensor at the top of the spring 533 triggers a pressure signal, and the control system immediately stops the pumping action of the air nozzle 534, cutting off the supply of high-pressure airflow to the surface of the conductor; further, the angle adjustment device 8 can drive the driving ring frame 4 to rotate alternately within a range of 180 degrees in both directions along the inner cavity of the main cabin 31. This rotation action drives the retractable contact mechanism 5 and the telescopic transmission group 6 to rotate synchronously with the conductor axis as the center, so that the arc-shaped friction layer composed of the friction blocks 532 performs full coverage grinding on the surface of the conductor, effectively removing surface impurities such as oxide layers and rust. Through the mechanical action of this circumferential rotation, it is ensured that the surface of the conductor obtains a uniform and consistent cleaning effect;

[0058] After the conductor surface is cleaned, the equipment switches to the preheating mode: the two coordinated gears 61 arranged obliquely and symmetrically are driven to rotate counterclockwise, driving the two groups of meshed retractable contact mechanisms 5 to perform the opposite linkage expansion and contraction to the above-mentioned one - the polishing part 53 of the original cleaning group withdraws from the conductor, and the heating part 54 of the heating group synchronously adheres to the conductor. At this time, the friction block 532 of the cleaning group opens the bottom wall channel of the polishing base 531 under the elastic reset action of the spring 533, and the value of the pressure sensor at the top of the spring 533 returns to the standard value, and the control system restarts the pumping function of the air nozzle 534 to restore the air supply; at the same time, the ring frame 4 is driven to continue to move along the inside of the main cabin 31 The cavity rotates alternately 180 degrees forward and backward, driving the retractable contact mechanism 5 and the telescopic transmission group 6 to rotate around the conductor axis, so that the heating unit 54 of the heating group preheats the conductor uniformly in the circumferential direction, significantly improving the adhesion performance of the subsequent extruded material. At the same time, the high-pressure airflow ejected by the air nozzle 534 passes through the slit between the triangular guide plate 535 and the side guide plate 536, and is ejected to the conductor surface through the bottom wall channel of the grinding base 531, completing the final cleaning process before heat treatment, effectively removing metal debris and dust remaining from grinding. This airflow sweeping process forms a synergistic effect with the rotational movement of the conductor, ensuring that the surface pretreatment meets the cleanliness standards required by the process.

[0059] After being intermittently pulled by the traction device, the pre-treated conductor sections enter the extrusion mechanism 1 in an orderly manner to realize precise extrusion coating of the insulating material, or are introduced into the cooling and curing chamber 2 for rapid cooling and shaping, thus forming a complete closed loop of the efficient extrusion production process for the submarine cable insulation layer. This process ensures that the insulating material is evenly covered and precisely cured on the conductor surface through the coordinated operation of the extrusion mechanism 1 and the cooling and curing chamber 2, and ultimately produces products that meet the strict technical standards of deep-sea cables.

[0060] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or modifications within the technical scope disclosed by the present invention; according to the technical plan and its improved conception of the present invention, these should be included under the protection of the present invention.

Claims

1. A submarine cable insulation material extrusion device, comprising an extrusion mechanism (1) for a conductor to pass through, a cooling and curing chamber (2) installed on one side of the extrusion mechanism (1), and a pretreatment chamber (3) connected to the other side; characterized in that: A rotatable drive ring frame (4) is provided inside the pretreatment chamber (3), and four sets of mirror-symmetrical retractable contact mechanisms (5) are respectively arranged on the front and rear sides of the drive ring frame (4), and two sets of telescopic transmission groups (6) are arranged symmetrically with the conductor as the symmetry center between two adjacent sets of retractable contact mechanisms (5) distributed along the circumferential direction; Taking the central axis of the drive ring frame (4) inclined at 45 degrees from the lower left to the upper right as a reference, the two groups of retractable contact mechanisms (5) on the upper left and the two groups of retractable contact mechanisms (5) on the lower right form a mirror symmetry; the two adjacent groups of retractable contact mechanisms (5) in the same direction form a mirror layout with the axis of the drive ring frame (4) inclined at 45 degrees from the upper left to the lower right as a secondary symmetry reference; each group of retractable contact mechanisms (5) includes a supporting main arm beam (51), the supporting main arm beam (51) adopts an L-shaped structure in which a long handle and a short handle are integrally formed, the long handle is rigidly connected to the side wall of the drive ring frame (4), a receiving groove is provided in the short handle, and a telescopic arm (52) is slidably sleeved in the receiving groove, and the inner ends of the two groups of telescopic arms (52) arranged opposite to each other on the same side of the drive ring frame (4) are detachably mounted with a polishing portion (53), and the inner ends of the other two groups of telescopic arms (52) arranged opposite to each other are detachably mounted with a heating portion (54); Two groups of oppositely distributed polishing parts (53) constitute a cleaning group; the other two groups of oppositely distributed heating parts (54) constitute a heating group, the polishing parts (53) adopt a grinding part structure, and the heating parts (54) adopt a heating part structure; the telescopic transmission group (6) includes a cooperative gear (61); the cooperative gear (61) is clamped between two adjacent groups of retractable contact mechanisms (5) and meshes with the telescopic arm (52), and the cooperative gears (61) located on the front and rear sides of the driving ring frame (4) are rigidly connected through the transmission shaft (62).

2. The submarine cable insulation material extrusion device according to claim 1, characterized in that: The polishing part structure consists of a polishing base (531), a friction block (532), a spring (533) and an air nozzle (534): at least three friction blocks (532) are arranged at the bottom of the polishing base (531), the middle friction block (532) is rigidly fixed to the polishing base (531), the outer ends of the friction blocks (532) on both sides are hinged to the polishing base (531) and the movable ends are elastically connected to the inner cavity of the polishing base (531) through the spring (533); when the polishing part (53) does not contact the conductor, the elastic reset force of the spring (533) causes the friction block (532) to open the bottom wall channel of the polishing base (531); the air nozzle (534) is arranged in a matrix form in the top cavity of the polishing base (531).

3. The submarine cable insulation material extrusion device according to claim 2, characterized in that: The grinding piece structure also includes a triangular guide plate (535) and a side guide plate (536); the triangular guide plate (535) rigidly connects the middle friction block (532) and the air nozzle (534), and the side guide plate (536) fits the spring (533) at an inclined angle and is oriented to point to the channel on the bottom wall of the grinding base (531); the two extend horizontally along the inner cavity of the grinding base (531).

4. The submarine cable insulation material extrusion device according to claim 3, characterized in that: The friction blocks (532) on both sides can form a smooth curved surface with the original friction block (532) in the middle of the bottom wall of the grinding base (531) after compressing the spring (533), forming a tightly fitting arc-shaped friction layer.

5. The submarine cable insulation material extrusion device according to claim 1, characterized in that: The heating element structure can be selected as a contact heater.

6. The submarine cable insulation material extrusion device according to claim 1, characterized in that: A driving mechanism (7) is also provided in the pretreatment chamber (3), and the driving mechanism (7) is composed of a central gear (71), a driven gear (72), a power input gear (73), a first reversible motor (74) and a rotating bracket (75), wherein a through hole is provided in the center of the central gear (71), and a driven gear (72) is installed at the end of the transmission shaft (62) on both sides of the symmetry center. The two driven gears (72) are meshed with the central gear (71) and maintain a central symmetric layout; the outer periphery of the central gear (71) is meshed with a power input gear (73) independent of the driven gear (72), and the gear is rigidly connected to the output shaft of the first reversible motor (74) through a coupling, and the base of the first reversible motor (74) is fixed on the rotating bracket (75); the rotating bracket (75) is rigidly connected to the driving ring frame (4) through two wings, and the ring frame is rotatably assembled on the side wall of the pretreatment chamber (3).

7. The submarine cable insulation material extrusion device according to claim 6, characterized in that: The pretreatment chamber (3) is composed of a main chamber (31), a convex ring chamber (32) and a support seat (33). The convex ring chambers (32) are welded to both ends of the main chamber (31), and the inner diameter of the convex ring chambers (32) is compatible with the rotational movement of the transmission shaft (62) and the drive mechanism (7). The end of the main chamber (31) away from the extrusion mechanism (1) is provided with a support seat (33), and the tail pipe of the central gear (71) is rotatably connected to the support seat (33) through a bearing.

8. The submarine cable insulation material extrusion device according to claim 7, characterized in that: The surfaces of the support seat (33) and the main cabin (31) close to the extrusion mechanism (1) are both provided with arc-shaped openings.

9. The submarine cable insulation material extrusion device according to claim 8, characterized in that: The driving ring frame (4) adopts an integrally formed structure of a gear ring (41) and two side limiting side plates (42), and the limiting side plates (42) are embedded in the annular grooves on the inner wall of the main cabin body (31) by sliding engagement; at the same time, the top wall of the main cabin body (31) is provided with a skylight structure; the inner side of the gear ring (41) is also welded with an axle seat (43), and the transmission shaft (62) is rotatably mounted in the axle seat (43).

10. The submarine cable insulation material extrusion device according to claim 9, characterized in that: An angle adjustment device (8) for driving the driving ring frame (4) to rotate is provided on the top of the pretreatment chamber (3), and its rotation stroke is limited to 180 degrees in both directions.

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