Optical cable jacket cooling device

Abstract

The present application relates to the technical field of optical cable sheath production and processing, and discloses an optical cable sheath cooling device, which comprises a water tank containing cooling liquid, further comprises: an optical cable which is bent and immersed in the water tank, and a guiding and cooling unit which is arranged along the running direction of the optical cable in sequence, wherein the guiding and cooling unit comprises: a floating bend unit which is used for forming non-contact support of an initial bending section; a micro-shaping straight section unit which is used for steady-state cooling and roundness micro-shaping of the optical cable sheath in a liquid film-flexible belt surface mode in a straight section; and a bent pipe unit which is used for self-centering and anti-swing of the optical cable in a subsequent bending section. The present application obtains a longer effective cooling path and more uniform circumferential heat exchange under the premise of not increasing the length of the machine body through the sequential and cooperative path of "first bending without contact liquid film → straight section flexible damping shaping → subsequent bending vortex centering", and significantly reduces bending marks, surface stripes and ovality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical cable sheath production and processing, in particular to an optical cable sheath cooling device. BACKGROUND

[0002] The optical cable sheath is the outermost layer of the optical cable, and its main function is to protect the core from the erosion of the surrounding environment, and at the same time, it can also play an insulating role, thereby prolonging the service life of the cable core.

[0003] Among them, the optical cable sheath is prepared by extrusion of an optical cable extruder and is formed through a die, and the formed material needs to be cooled and round after processing and use.

[0004] At present, the cooling method for the optical cable sheath can be roughly divided into water-based cooling and gas-based cooling, and the most common water-based cooling is to use a long water tank for immersion cooling, and this method can ensure effective cooling, but the water tank is relatively long in the normal state and occupies a large space, therefore, in order to improve the utilization of space, in the Chinese authorized invention publication No. CN116141639B, a cooling device for optical cable sheath production is disclosed, which realizes water cooling at different depths through the process of winding and transmission of the optical cable sheath by the multi-layer cooling mechanism, solving the problems of large occupied area and excessive water resource input of the traditional long water tank cooling equipment.

[0005] However, since the optical cable is bent and transmitted by pulleys / rollers in the cooling tank, although the cooling path can be lengthened in the short machine body, the contact stress at the bending part and the coating layer are still in a hot soft state, which is easy to press out marks and enlarge the ovality, thereby causing the performance of the cooled and formed optical cable to be substandard. SUMMARY

[0006] The present application aims to provide an optical cable sheath cooling device to solve at least one of the technical problems existing in the prior art.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an optical cable sheath cooling device, comprising a water tank containing cooling liquid, and further comprising:

[0008] a curved optical cable immersed in the water tank, and a guide and cooling unit arranged in sequence along the running direction of the optical cable, which comprises:

[0009] a floating curve unit for forming non-contact support of the initial curved section;

[0010] a micro-shaping straight section unit for steady-state cooling and roundness micro-shaping of the optical cable sheath in the straight section in the form of liquid film-flexible belt surface;

[0011] And a bending unit for self-centering and swing suppression of the optical cable in the subsequent bending section.

[0012] Optionally, the floating bending unit is an elastically bendable elastic bending pipe, and the elastic bending pipe is installed in the sink through a support, an outer ring capable of eccentricity relative to the elastic bending pipe is sleeved on the outer periphery of the elastic bending pipe, and a plurality of circumferential slits are formed in the wall of the elastic bending pipe along the circumference.

[0013] Further comprising a self-adaptive adjusting member capable of controlling the eccentricity between the outer ring and the elastic bending pipe according to the bending radius of the elastic bending pipe, so that the circumferential slits located at the inner arc position supply the lowest pressure and gradually increase outward to the outer arc, and a liquid film is established on the inner wall of the elastic bending pipe to float and centrally pass through the optical cable.

[0014] Optionally, an outer ring cavity is formed in the outer wall of the elastic bending pipe at the inner ring position of the outer ring, the outer ring is connected between the elastic film and the inner wall of the outer ring cavity and forms a pressure supply space, a first liquid inlet pipe for supplying liquid into the pressure supply space is embedded in the inner wall of the elastic bending pipe, and the first liquid inlet pipe is connected with an external independent liquid supply system.

[0015] Optionally, the self-adaptive adjusting member comprises an elastic bending piece fixed at the inner arc surface position of the elastic bending pipe through a mounting seat, the elastic bending piece has an initial state with an initial bending radius toward the elastic bending pipe, and the arc top position is penetrated and fixedly connected with the edge ear of the outer ring.

[0016] Optionally, the micro-shaping straight section unit comprises a ring belt moving in the same direction as the optical cable, a film injection port located at the leading edge of the ring belt, and a side skirt film supply structure arranged on both sides of the ring belt, the ring belt is installed on a floating pressure limiting carrier in the sink and only allows vertical following, so as to limit the normal pressure of the ring belt on the optical cable.

[0017] Further comprising a finishing structure arranged at the end position of the ring belt and used for gently guiding the liquid film away.

[0018] Optionally, the ring belt is drivingly connected through two transmission rollers, the transmission rollers are driven through an external transmission structure, the top of the floating pressure limiting carrier is further fixed with an equalizing chamber through a support, the equalizing chamber is located between the upper and lower belts of the ring belt, the equalizing chamber is connected with an external independent liquid supply system through a second liquid inlet pipe, the film injection port is a leading edge film injection nose arranged at the front end of the equalizing chamber and extending to the leading edge position of the ring belt and the optical cable, the equalizing chamber is provided with a flash protruding from the width of the ring belt on both sides, and a through-width slit is arranged on each flash, and the two through-width slits form the side skirt film supply structure.

[0019] Optionally, the tailing structure comprises a damping plate fixed on the floating pressure limiting carrier, the damping plate is designed as a Z-shaped plate and is located at the end edge of the ring belt, a plurality of damping holes are formed on the damping plate, and the plane of the damping plate is lower than the belt plane of the ring belt.

[0020] Optionally, the pipe bending unit comprises spliced pipe bends which can be spliced with each other, the inner wall of the spliced pipe bend is provided with a spiral guide groove, and the outer side of the pipe bend is provided with a tangential injection port, the injection port forms a controllable spiral flow in the spliced pipe bend along the spiral guide groove, so that a radial suction core is generated in the pipe bend.

[0021] Optionally, the spliced pipe bend located at the outlet position of the end is provided with a de-rotation transition section, the de-rotation transition section comprises a straight groove connected to the end of the spiral guide groove and designed in parallel with the axis of the spliced pipe bend.

[0022] Optionally, the floating curve unit, the micro-shaping straight section unit and the pipe bending unit all operate in the cooling liquid, and the liquid supply circuits of the three are independent of each other and supply liquid to the liquid in a differential pressure mode.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] Firstly, the present application replaces the traditional short machine body lengthening cooling dependent on the pulley / roller hard contact bending transmission with water film-flexible-vortex three kinds of "non-contact / low contact stiffness" composite guidance through the sequential synergistic path of "first bending without contact liquid film → straight section flexible damping shaping → subsequent bending vortex centering", and the core lies in that the ring cavity-bend angle mechanical linkage pressure distribution is achieved through the ring slit wall jet and eccentricity, the "strong outer arc and weak inner arc" liquid film support is actively established in the curve, the suspension and self-centering in the curve are realized, and the first bending indentation and oval enlargement are eliminated; secondly, the "film supply" (front edge through-width slit + side skirt) and "bearing" (floating pressure limiting carrier) are decoupled, the controlled water film provides damping and "soft film" micro-shaping in the straight section, and the underwater gentle tailing is achieved through the damping plate, so that the cross flow and disturbance in the tank are isolated outside the film interval gap; thirdly, the controllable vortex and radial pressure gradient are formed through the superposition of the spiral groove + arc tangential injection in the spliced pipe bend, and the "suction core" self-centering is generated without the need of physical roller contact.

[0025] Secondly, the present application protects the most sensitive first bending through the three-section mutual front and rear steady-state inlets, the residual and continuous circle fixing after the bending is absorbed by the pipe bending unit, and the subsequent multiple bends are guaranteed not to be interrupted by the micro-shaping straight section unit; the film thickness and the plane pressure are significantly improved in robustness to the linear diameter / tension / flow field fluctuation through the independent differential pressure liquid supply and the "gentle mixing" tank water at the end, so that a longer effective cooling path and more uniform circumferential heat exchange are obtained without increasing the machine body length, and the bending indentation, surface stripe and ovality are significantly reduced, and the risk of backfilling and micro-rubbing is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Figure 2 is a sectional view of the elastic bend pipe in a straight pipe state according to the present application;

[0027] Figure 2 Figure 3 is a sectional view of the elastic bend pipe in a straight pipe state according to the present application; Figure 1 Figure 4 is a sectional view along A-A in Figure 3;

[0028] Figure 3 Figure 5 is a sectional view of the outer ring and the elastic bend pipe in a concentric state according to the present application;

[0029] Figure 4 Figure 6 is a sectional view of the outer ring and the elastic bend pipe in an eccentric state according to the present application;

[0030] Figure 5 Figure 7 is a schematic view of the elastic bend pipe after bending according to the present application;

[0031] Figure 6 Figure 8 is a schematic view of the micro-plastic straight section unit according to the present application;

[0032] Figure 7 Figure 9 is a schematic view of the micro-plastic straight section unit without the optical cable according to the present application;

[0033] Figure 8 Figure 10 is a front view of the micro-plastic straight section unit according to the present application;

[0034] Figure 9 Figure 11 is a sectional view along B-B in Figure 10; Figure 8

[0035] Figure 12 is a schematic view of the spliced bend pipe according to the present application; Figure 10 Figure 1 Figure 13 is a schematic view of the spliced bend pipe according to the present application;

[0036] Figure 11 Figure 2 Figure 14 is a schematic view of the optical cable layout according to the present application.

[0037] Figure 12 Figure 15 is a schematic view of the optical cable layout according to the present application.

[0038] In the figure: 1, elastic bend pipe; 2, outer ring cavity; 3, annular slit; 4, outer ring; 5, elastic membrane; 6, elastic bend piece; 7, first liquid inlet pipe; 8, tapered groove; 9, optical cable; 10, floating pressure limiting carrier; 11, annular belt; 12, pressure equalizing cavity; 13, second liquid inlet pipe; 14, front edge film injection nose; 15, wide slit; 16, energy dissipation plate; 17, film area; 18, spliced bend pipe; 19, spiral guide groove. DETAILED DESCRIPTION

[0039] ​​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0040] Please refer to Figures 1 to 12 The present application provides a technical solution: a cable sheath cooling device, comprising a water tank containing cooling liquid, and further comprising:

[0041] a curved cable 9 immersed in the water tank, and a guide and cooling unit arranged in sequence along the running direction of the cable 9, wherein the guide and cooling unit comprises:

[0042] a floating curve unit for forming non-contact support of the initial curved section;

[0043] a micro-shaping straight section unit for steady-state cooling and roundness micro-shaping of the cable 9 sheath in the form of liquid film-flexible belt surface in the straight section;

[0044] and a bend unit for self-centering and anti-sway of the cable 9 in the subsequent curved section.

[0045] In use, after the cable 9 sheath is formed and extruded, it is pulled outward by the traction force of the front end and immersed in the water tank, and the cooling water in the water tank is used to cool and form the sheath. In order to reduce the laying length of the water tank or further improve the cooling rate in a limited laying area, the cable 9 needs to be transported in a curved form in the water tank to improve the cooling efficiency. The specific mode is as follows:

[0046] After the cable 9 enters the water tank, it will pass through the floating curve unit, the micro-shaping straight section unit and the bend unit in sequence. The floating curve unit is designed at the initial curved position of the cable 9, i.e. the first large bend (closest to the head / diameter setting box), the target is to cross the most dangerous bend with zero contact to avoid indentation / enlarged ovality of the hot soft state. The bend unit is placed at the second bend / surface changing bend (when the plane needs to be changed or the path needs to be lengthened), so that the cable 9 can be self-centered and anti-sway in the subsequent curved section. The micro-shaping straight section unit is placed in the straight section between the subsequent curved sections, and plays the role of "gentle lengthening of the path + micro-shaping".

[0047] As shown in the simple view of Figure 12 , where A represents the floating curve unit, B represents the bend unit, and C represents the micro-shaping straight section unit. The cable 9 running track in the form of S-bend is taken as an example, but it is not limited to this mode, and Z-shaped surface changing form or back-shaped spiral ascending / descending form can also be used.

[0048] Thus, through the targeted treatment of different regions of the optical cable 9, the optical cable 9 can be lengthened in the short body cooling path, the non-contact support can avoid the indentation at the sheath bending position of the optical cable 9, and the ellipticity of the sheath can be fine-tuned in the subsequent straight region, thereby improving the performance of the optical cable after cooling and forming.

[0049] In one of the more preferred embodiments, a suspended curved channel unit is provided;

[0050] The suspended curved channel unit is an elastically bendable elastic curved pipe 1, and the elastic curved pipe 1 is mounted in the water tank through a support. An outer ring 4 that can generate eccentricity relative to the elastic curved pipe 1 is sleeved on the outer periphery of the elastic curved pipe 1. A plurality of circumferential slits 3 are formed on the wall of the elastic curved pipe 1 along the circumference.

[0051] Further comprising an adaptive adjusting member, which can control the eccentricity between the outer ring 4 and the elastic curved pipe 1 according to the bending radius of the elastic curved pipe 1, so that the circumferential slits 3 located at the inner arc position are supplied with the lowest pressure and gradually increased outward to the outer arc, and a liquid film is established on the inner wall of the elastic curved pipe 1 to float and pass through the optical cable 9 in the center.

[0052] Among them, the outer wall of the elastic curved pipe 1 is provided with an outer ring cavity 2 at the inner arc position of the outer ring 4, and the outer ring 4 is connected between the inner wall of the outer ring cavity 2 and the elastic membrane 5 to form a pressure supply space. The inner wall of the elastic curved pipe 1 is embedded with a first liquid inlet pipe 7 for supplying liquid into the pressure supply space, and the first liquid inlet pipe 7 is connected with an external independent liquid supply system.

[0053] Among them, the adaptive adjusting member includes an elastic bending piece 6 fixed at the inner arc surface position of the elastic curved pipe 1 through a mounting seat. The initial state of the elastic bending piece 6 has an initial radius of bending towards the elastic curved pipe 1, and the arc top position is penetrated and fixedly connected with the edge ear of the outer ring 4.

[0054] For details, please refer to Figures 1-5 Firstly, the elastic curved pipe 1 can control its bending according to the size of the initial bending angle, and the same as the initial bending angle, it can be installed in the water tank through a support, and at the same time, when the elastic curved pipe 1 is bent, the elastic bending piece 6 at the inner arc surface position will also bend and move eccentrically outward along the outer arc of the outer ring 4, as Figure 3 and Figure 4 are respectively the schematic diagrams of the concentric and eccentric states of the outer ring 4 and the elastic curved pipe 1. When the outer ring 4 and the elastic curved pipe 1 are in the eccentric state, the shielding of the circumferential slits 3 at the inner arc position of the elastic curved pipe 1 will be increased, and the shielding at the outer arc position will be decreased, as Figure 4As shown in h1 and h2, the water flow from the annular slits 3 at the inner arc position is reduced, while the water flow from the annular slits 3 at the outer arc position is increased, so that the flow and pressure are deviated to the outer arc. When the cooling liquid is injected into the pressure supply space through the first liquid inlet pipe 7 by the external independent liquid supply system, the thin jet from the outer arc annular slits 3 will be sprayed out of the annular slits 3. Due to the Coanda effect, the thin jet from the outer arc annular slits 3 will adhere to the inner wall of the outer arc to form a high-speed liquid film. The low-pressure spray from the inner arc annular slits 3 mainly plays a role in liquid supplement and film stabilization.

[0055] The two side jets wrap the "main flow" in the elastic bending pipe 1 into a superimposed flow state of the wall-covered liquid film + the central axial flow. From the cross-sectional view, the outer arc liquid film will generate higher dynamic pressure and static pressure to form a non-contact "water pad" between the outer circle of the optical cable 9 and the wall surface, and the normal support force thereof will increase with the jet pressure and film thickness gradient.

[0056] The liquid film generates uniform normal support on the optical cable 9 to offset the gravity and bending normal load, thereby avoiding physical contact. The pressure difference between the high outer arc and the low inner arc forms a radial pressure gradient on the cross section to push the optical cable 9 to the geometric center, so that it returns to the central channel, and achieves the effect of non-contact support.

[0057] It is worth mentioning that the above structure can be designed in multiple groups on the elastic bending pipe 1, and the liquid supply systems between the groups are independently controlled. In this way, the "multi-section jet relay" can be used. When the liquid film of the previous ring reaches the decay area, the next ring relays "energy supplement". Therefore, the entire bending section is always covered with a continuous liquid film. At the same time, the pressure of the outer arc increases from the inlet to the outlet, offsetting the increasing bending normal load and momentum loss with the bending advancement.

[0058] In this way, the self-adaptive liquid film bending cable 9 with pure mechanical bending pressure increasing on the outer arc and pressure decreasing on the inner arc supports and centralizes the cable throughout the first bending process without point / line contact, so that there is no pressure mark or indentation. The pressure difference between the high outer arc and the low inner arc is a controllable "soft support" that is self-adaptive to the bending tightness and quality indicators. The wall-attached jet constantly refreshes the boundary layer, so that the surface of the optical cable 9 is "skinned" first, which facilitates the subsequent bending and straight-line contact / flow field bearing, improves the cooling effect.

[0059] In one of the more preferred embodiments, a micro-reshaping straight section unit is provided;

[0060] The micro-reshaping straight section unit includes a ring belt 11 moving in the same direction as the optical cable 9, a film injection port at the leading edge thereof, and a side skirt film supply structure arranged on both sides of the ring belt 11. The ring belt 11 is installed on the floating pressure limiting carrier 10 in the water tank and only allows vertical following, so as to limit the normal pressure of the ring belt 11 on the optical cable 9.

[0061] It also includes a finishing structure arranged at the end position of the ring belt 11 and used for gently guiding the liquid film away.

[0062] Wherein, the ring belt 11 is driven by two transmission rollers, and the transmission rollers are driven by external transmission structure. The top of the floating pressure limiting carrier 10 is also fixed with an equalizing chamber 12 through a support, and the equalizing chamber 12 is located between the upper and lower two belts of the ring belt 11. The equalizing chamber 12 is connected with an external independent liquid supply system through a second liquid inlet pipe 13. The film injection port is a front edge film injection nose 14 arranged at the front end of the equalizing chamber 12 and extending to the front edge position of the ring belt 11 and the optical cable 9. The equalizing chamber 12 is provided with two protruding flashs on the wide surface of the ring belt 11, and the two flashs are provided with a through-wide slit 15. The two through-wide slits 15 form a side skirt film supply structure.

[0063] Wherein, the end structure includes an energy dissipation plate 16 fixed on the floating pressure limiting carrier 10. The energy dissipation plate 16 is arranged as a U-shaped plate and located at the edge position of the ring belt 11. A plurality of energy dissipation holes are arranged on the energy dissipation plate 16, and the plane of the energy dissipation plate 16 is lower than the belt surface of the ring belt 11.

[0064] Specifically refer to Figures 6-9 In the straight line segment of the optical cable 9, first, the transmission roller of the ring belt 11 is driven to rotate by the external transmission structure, so that the ring belt 11 moves along the traction direction of the optical cable 9, and the transmission speed is the same as the traction speed.

[0065] Secondly, the external independent liquid supply system injects clean water into the equalizing chamber 12 through the second liquid inlet pipe 13, and sprays out from the front edge film injection nose 14 and the through-wide slit 15 after equalizing. The front edge film injection nose 14 sprays out from the front edge position of the ring belt 11 and the optical cable 9, and forms a layer of main flow channel in the film area 17 between the ring belt 11 and the outer wall of the optical cable 9. The liquid sprayed out from the through-wide slit 15 on both sides of the ring belt 11 forms a side edge supplement flow, and finally forms a stable axial water film between the ring belt 11 and the optical cable 9. The shear damping provided by the axial water film can quickly attenuate the snake swing of the optical cable 9, so that it is more stable, and the effect of micro-shaping the optical cable 9 is achieved by suppressing swing + cutting peak filling valley (reducing instantaneous ovalization / jumping pressure).

[0066] And, since the speed of the ring belt 11 and the optical cable 9 is the same, the axial water film reduces the sliding friction to almost zero, and the ring belt 11 lightly sticks to the optical cable through the axial water film under the support of the floating pressure limiting carrier 10 with limited amplitude surface pressure. When encountering instantaneous impact or eccentricity, the floating pressure limiting carrier 10 can sink to make room, and the normal peak value is "locked" in the safety window to avoid causing pressure marks on the sheath surface.

[0067] In this way, under the action of the low surface pressure of the axial water film on the outer wall of the optical cable 9, the optical cable 9 can be slightly micro-shaped during transportation to improve the performance of the optical cable 9 after the sheath is cooled and formed.

[0068] It is worth mentioning that, the wiper lip or brush roller can also be installed on the floating pressure carrier 10 to clean the water and particles attached to the ring belt 11 during the circulation below, so as not to bring the dirt back to the film area 17, and ensure the purity of the water film;

[0069] Furthermore, the energy dissipation plate 16 is arranged at the end edge position of the ring belt 11, so that the axial water film is dispersed into many small streams after falling on the hole plate after becoming a free piece flow at the end, and plays a role of energy dissipation, so as to achieve the purpose of soft ending of the axial water film, to avoid the formation of small vortex in the end of the circulation in the groove, and to avoid the phenomenon of local negative pressure, film rupture or end touch caused by the "big water" being sucked into the outlet of the film area 17, and to provide a controlled boundary condition for the water film, and to isolate the disturbance outside the film area 17.

[0070] It is worth noting that, the baffle can also be designed on both sides of the film area 17 to further reduce the interference and transverse exchange of the cooling water in the external water tank on the axial water film in the film area 17.

[0071] In one of the more preferred embodiments, an implementation of a bending pipe unit is provided;

[0072] The bending pipe unit comprises spliced bending pipes 18 which can be spliced with each other, the inner wall of the spliced bending pipe 18 is provided with a spiral guide groove 19, and the outer side of the bending pipe is provided with a tangential injection port, and the injection port forms a controllable spiral flow in the spliced bending pipe 18 along the spiral guide groove 19, so as to generate a radial suction core in the bending pipe.

[0073] Among them, the outlet position of the spliced bending pipe 18 at the end is provided with a despinning transition section, and the despinning transition section comprises a straight groove connected at the end of the spiral guide groove 19 and parallel to the axis of the spliced bending pipe 18.

[0074] Specifically, refer to Figures 10-11 The spliced bending pipe 18 is arranged at the subsequent bending section position of the optical cable 9 through the support or shaft seat structure, and the splicing is selected according to the angle of the bending degree, and then the external independent liquid supply system forms a controllable spiral flow in the spliced bending pipe 18 along the spiral guide groove 19 through the injection port, and the radial pressure gradient (large outside and small inside) is established through the groove rise angle and the injection angle, and the "suction core" effect is generated, so that the optical cable 9 automatically approaches the center line in the bending pipe;

[0075] And the despinning transition section (a straight groove parallel to the axis of the spliced bending pipe 18) is arranged at the rear end of the bending pipe to avoid the influence of vortex on the downstream.

[0076] In this way, the hard contact part is not used to self-center in the bending pipe, suppress the swing, and at the same time maintain the axial traction continuity in the bending section, and reduce the disturbance to the downstream section.

[0077] Similarly, the splicing mode can also make the water injection port in the form of "multi-section type jetting relay" to "supplement energy" for the spiral flow, so that the radial suction force can be maintained.

[0078] It is worth mentioning that the injection port can also be designed as a Venturi-expansion composite cavity, that is, a three-section injection port profile of micro-constriction-equal-diameter-micro-expansion, which can increase the circumferential / axial velocity ratio without pressure rise, so that the central suction force is stronger and the separation resistance is higher.

[0079] In summary, through the sequential synergistic path of "first bend without contact liquid film → straight section flexible damping shaping → subsequent bend vortex centralization", the traditional short body cooling relies on the pulley / roller hard contact bending transmission, which is replaced by the composite guidance of water film-flexible-vortex three "non-contact / low contact stiffness"; the core is to establish a "strong outer arc and weak inner arc" liquid film support in the bend through the ring-shaped slit wall jet and the eccentric ring cavity-bend angle mechanical linkage pressure distribution, to achieve suspension and self-centering in the bend, and eliminate the first bend indentation and oval enlargement; secondly, the "film supply" (front edge full-width slit + side skirt) and "bearing" (floating pressure-limited carrier) are decoupled to provide damping and "soft mold" micro-shaping in the straight section by controlled water film, and the underwater gentle ending is realized through the energy dissipation plate 16 to isolate the cross flow and disturbance in the groove from the outside of the film gap 17; in addition, the spiral groove + arc outside tangential injection is superimposed in the spliced bend pipe 18 to form controllable rotational flow and radial pressure gradient, and "suction core" self-centering without physical roller contact.

[0080] Three-section stable inlet: the suspension bend unit protects the most sensitive first bend, the bend pipe unit absorbs the residual and continuous constant circle after the bend, and the micro-shaping straight section unit guarantees the subsequent multiple bends without interruption; independent differential pressure liquid supply at the end of the groove water makes the film thickness and surface pressure robustness to the linear diameter / tension / flow field fluctuations significantly improved. Thus, without increasing the length of the body, a longer effective cooling path and more uniform circumferential heat exchange are obtained, which significantly reduces the bend imprint, surface stripes and ovality, and reduces the risk of backfilling and micro-rubbing.

[0081] In one of the more preferred embodiments, the suspension bend unit, the micro-shaping straight section unit, and the bend pipe unit all operate in the cooling liquid, and the liquid supply circuits of the three are independent of each other and supply liquid to the groove liquid in differential pressure.

[0082] The standard parts used in this embodiment can be directly purchased from the market, and the non-standard structural parts according to the description and drawings can also be directly processed according to the existing technical knowledge without any doubt, and the connection method of each part adopts the mature conventional means in the existing technology, and the machinery, parts and equipment all adopt the conventional models in the existing technology, so here is not described in detail.

[0083] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A cooling device for optical cable sheaths, comprising a water tank for holding coolant, characterized in that, Also includes: The optical cable (9) is bent and submerged in the water tank, and the guiding and cooling units are arranged sequentially along the running direction of the optical cable (9), including: Suspended curve unit, used to form non-contact support for the initial curved section; The micro-shaping straight section unit is used to perform steady-state cooling and roundness micro-shaping of the optical cable (9) sheath in a liquid film-flexible strip manner within the straight section; And a bend unit for self-centering and sway suppression of the optical cable (9) in subsequent bends; The suspended curved unit is an elastic bend (1) that can be bent elastically, and the elastic bend (1) is installed in the water tank by a bracket. The outer circumference of the elastic bend (1) is fitted with an outer ring (4) that can generate eccentricity relative to it. Several circumferential slits (3) are opened on the wall of the elastic bend (1) along the circumference. It also includes an adaptive adjustment component, which can control the eccentricity between the outer ring (4) and the elastic bend (1) according to the curvature of the elastic bend (1), so that the pressure supplied to the circumferential slit (3) located in the inner arc position is the lowest and gradually increases towards the outer arc, so that it establishes a wall-adhering liquid film on the inner wall of the elastic bend (1) to float and center the optical cable (9). The outer wall of the elastic bend (1) is provided with an outer ring cavity (2) at the inner ring position of the outer ring (4), and the outer ring (4) is connected to the inner wall of the outer ring cavity (2) through an elastic membrane (5) to form a pressure supply space. The inner wall of the elastic bend (1) is provided with a first liquid inlet pipe (7) for supplying liquid to the pressure supply space, and the first liquid inlet pipe (7) is connected to an external independent liquid supply system. The adaptive adjustment component includes an elastic bend (6) fixed to the inner arc surface of the elastic bend (1) by a mounting base. The elastic bend (6) has an initial arc bending towards the elastic bend (1) in its initial state, and the arc apex position penetrates and is fixedly connected to the edge ear of the outer ring (4). The bending unit includes splicing bends (18) that can be spliced ​​together. The inner wall of the splicing bend (18) is provided with a spiral guide groove (19), and the outer side of the bend is provided with a tangential injection port. The injection port forms a controllable spiral flow in the splicing bend (18) along the spiral guide groove (19) to generate radial suction in the bend. The splicing bend (18) has a de-swirl transition section at the outlet position at the end. The de-swirl transition section includes a straight groove connected to the end of the spiral guide groove (19) and designed to be parallel to the axis of the splicing bend (18).

2. The optical cable sheath cooling device according to claim 1, characterized in that: The micro-shaping straight section unit includes a ring belt (11) that moves in the same direction as the optical cable (9), a film injection port located at its leading edge, and a side skirt film supply structure arranged on both sides of the ring belt (11). The ring belt (11) is installed on a floating pressure limiting carrier (10) located in the water tank and only allowed to move vertically, so as to limit the normal pressure of the ring belt (11) on the optical cable (9). It also includes a tailing structure located at the end of the ring (11) for gently drawing the liquid film away.

3. The optical cable sheath cooling device according to claim 2, characterized in that: The ring belt (11) is connected by two transmission rollers, and the transmission rollers are driven by an external transmission structure. The top of the floating pressure limiting carrier (10) is also fixed with a pressure equalization chamber (12) by a bracket. The pressure equalization chamber (12) is located between the upper and lower belts of the ring belt (11). The pressure equalization chamber (12) is connected to an external independent liquid supply system through a second liquid inlet pipe (13). The injection port is a front edge injection nose (14) located at the front end of the pressure equalization chamber (12) and extending to the front edge of the ring belt (11) and the optical cable (9). Both sides of the pressure equalization chamber (12) are provided with protruding burrs on the wide surface of the ring belt (11), and both burrs are provided with through-slits (15). The two through-slits (15) form a side skirt film supply structure.

4. The optical cable sheath cooling device according to claim 2, characterized in that: The finishing structure includes an energy dissipation plate (16) fixed on a floating pressure limiting carrier (10). The energy dissipation plate (16) is a U-shaped plate and is located at the end edge of the ring belt (11). The energy dissipation plate (16) has several energy dissipation holes, and the plane of the energy dissipation plate (16) is lower than the belt surface of the ring belt (11).

5. The optical cable sheath cooling device according to any one of claims 1-4, characterized in that: The suspended curve unit, the micro-shaping straight section unit, and the bend unit all operate in the coolant, and their liquid supply circuits are independent of each other and are supplied with liquid relative to the tank liquid in a differential pressure manner.

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