Optical cable sheath cooling device

Abstract

The invention 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 for containing cooling liquid, an optical cable bent and immersed in the water tank, and guiding and cooling units sequentially arranged along the running direction of the optical cable, the non-contact support is used for forming an initial bending section; the micro-shaping straight section unit is used for performing steady-state cooling and roundness micro-shaping on the optical cable sheath in a liquid film-flexible belt surface mode in the straight section; and the bending pipe unit is used for self-centering and swinging suppression of the optical cable in the subsequent bending section. According to the invention, through a sequential cooperative path of'first bending non-contact liquid film-straight section flexible damping shaping-subsequent bent vortex centralization ', a longer effective cooling path and more uniform circumferential heat exchange are obtained on the premise of not increasing the length of a machine body, and bend marks, surface stripes and ovality are obviously reduced.

Description

Technical Field

[0001] This invention relates to the field of optical cable sheath production and processing technology, specifically to an optical cable sheath cooling device. Background Technology

[0002] The fiber optic cable sheath is the outermost layer of the fiber optic cable. Its main function is to protect the core from corrosion by the surrounding environment, and it also serves as insulation, extending the service life of the core.

[0003] The optical cable sheath is produced by extruding with an optical cable extruder and forming with a die. The formed material needs to be cooled and spherically shaped before it can be processed and used.

[0004] Currently, cooling methods for optical cable sheaths can be broadly categorized into water-based cooling and air-based cooling. Among water-based cooling methods, the most common approach is immersion cooling using long-distance water tanks. While this method ensures effective cooling, the water tanks are typically quite long and require significant space. Therefore, to improve space utilization, Chinese Patent Publication No. CN116141639B discloses a cooling device for the production of optical cable sheaths. This device, through a multi-layered cooling mechanism, achieves water cooling at different depths during the winding and transmission process of the optical cable sheath, solving the problems of excessive space occupation and excessive water consumption associated with traditional long water tank cooling equipment.

[0005] However, since the optical cable is bent and driven by pulleys / rollers in the cooling tank, although the cooling path can be lengthened in the short body, the contact stress at the bend and the covering layer are still in a hot soft state, which can easily leave marks and increase the ellipticity, resulting in the optical cable performance not meeting the standards after cooling and forming. Summary of the Invention

[0006] The purpose of this invention is to provide a cooling device for optical cable sheaths to solve at least one technical problem existing in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a cooling device for optical cable sheaths, comprising a water tank for holding coolant, and further comprising: The optical cable is bent and submerged in a water tank, and the guiding and cooling units are arranged sequentially along the direction of the optical cable's operation, 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 sheath in a liquid film-flexible strip manner within a straight section; And a bend unit for self-centering and sway control of the optical cable in subsequent bends.

[0008] Optionally, the suspended curved unit is an elastic curved tube that can be bent elastically, and the elastic curved tube is installed in the water tank by a bracket. An outer ring that can be eccentrically fitted around the outer periphery of the elastic curved tube is provided, and a number of circumferential slits are opened on the wall of the elastic curved tube along the circumference. It also includes an adaptive adjustment component, which can control the eccentricity between the outer ring and the elastic bend according to the curvature of the elastic bend, so that the pressure supplied to the circumferential slit 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 to float and center the optical cable.

[0009] Optionally, the outer wall of the elastic bend is provided with an outer ring cavity at the inner ring position of the outer ring, and the outer ring is connected to the inner wall of the outer ring cavity through an elastic membrane to form a pressure supply space. The inner wall of the elastic bend is provided with a first liquid inlet pipe for supplying liquid to the pressure supply space, and the first liquid inlet pipe is connected to an external independent liquid supply system.

[0010] Optionally, the adaptive adjustment component includes an elastic bend fixed to the inner arc surface of the elastic bend via a mounting base. The elastic bend has an initial curvature that bends towards the elastic bend, and the apex of the arc penetrates and is fixedly connected to the edge lug of the outer ring.

[0011] Optionally, the micro-shaping straight section unit includes a ring belt that moves in the same direction as the optical cable, a film injection port located at its leading edge, 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 located in the water tank and only allowed to move vertically, so as to limit the normal pressure of the ring belt on the optical cable. It also includes a tailing structure located at the end of the ring belt for gently drawing the liquid film away.

[0012] Optionally, the ring belt is connected by two drive rollers, and the drive rollers are driven by an external transmission structure. The top of the floating pressure limiting carrier is also fixed with a pressure equalization chamber by a bracket. The pressure equalization chamber is located between the upper and lower belts of the ring belt. The pressure equalization chamber is connected to an external independent liquid supply system through a second liquid inlet pipe. The injection port is a leading edge injection nose located at the front end of the pressure equalization chamber and extending to the leading edge of the ring belt and the optical cable. Both sides of the pressure equalization chamber are provided with protruding flanges on the wide surface of the ring belt, and both flanges are provided with through-width slits. The two through-width slits form a side skirt film supply structure.

[0013] Optionally, the finishing structure includes an energy dissipation plate fixed on a floating pressure-limiting carrier. The energy dissipation plate is configured as a U-shaped plate and located at the end edge of the ring belt. The energy dissipation plate has several energy dissipation holes, and the plane of the energy dissipation plate is lower than the surface of the ring belt.

[0014] Optionally, the bending unit includes spliced ​​bending pipes that can be spliced ​​together. The inner wall of the spliced ​​bending pipe is provided with a spiral guide groove, and the outer side of the bending pipe is provided with a tangential injection port. The injection port forms a controllable spiral flow in the spliced ​​bending pipe along the spiral guide groove to generate radial suction in the bending.

[0015] Optionally, the spliced ​​bend is provided with a de-swirl transition section at the outlet position of its end. The de-swirl transition section includes a straight groove connected to the end of the spiral guide groove and designed to be parallel to the axis of the spliced ​​bend.

[0016] Optionally, the suspended bend 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.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: I. This invention, through a sequential and coordinated path of "non-contact liquid film in the first bend → flexible damping and shaping in the straight section → vortex centering in subsequent bends," completely replaces the traditional pulley / roller hard-contact bending transmission relied upon for cooling in short-fuselage stretching with a composite guide of three "non-contact / low-contact stiffness" methods: water film, flexible, and vortex. Its core lies in actively establishing a "strong outer arc, weak inner arc" liquid film support within the bend through the mechanical linkage and pressure distribution of the circumferential slit wall-mounted jet and the eccentric annular cavity—bend angle, achieving suspension and... The self-centering eliminates the indentation and elliptical enlargement of the first bend; secondly, it decouples the "film supply" (leading edge through-width slit + side skirt) from the "bearing" (floating pressure limiting carrier), so that the controlled water film provides damping and "soft mold" micro-shaping in the straight section, and achieves gentle underwater finishing through the energy dissipation plate, isolating the crossflow and disturbance in the tank outside the gap of the film area; furthermore, the spiral groove + tangential jet outside the arc are superimposed in the splicing bend to form a controllable vortex and radial pressure gradient, generating a "suction core" that is self-centering without the need for physical roller contact.

[0018] Second, this invention employs three interconnected steady-state inlets: a suspended bend unit protects the most sensitive first bend, a bend unit absorbs post-bend residue and maintains a consistent circle, and a micro-shaping straight section unit ensures uninterrupted operation during subsequent bends; independent differential pressure liquid supply throughout the process, with gentle mixing of tank water at the end, significantly improves the robustness of film thickness and surface pressure to fluctuations in wire diameter / tension / flow field. Thus, without increasing the fuselage length, a longer effective cooling path and more uniform circumferential heat transfer are achieved, significantly reducing bend marks, surface streaks, and ellipticity, and minimizing the risk of backflow and micro-scratching. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the elastic bend of the present invention in its straight pipe state; Figure 2 For the present invention Figure 1 A sectional view along the middle AA; Figure 3This is a cross-sectional schematic diagram showing the outer ring and the elastic bend of the present invention in a concentric state. Figure 4 This is a cross-sectional schematic diagram of the outer ring and the elastic bend of the present invention in an eccentric state; Figure 5 This is a schematic diagram of the flexible bend of the present invention after bending; Figure 6 This is a three-dimensional structural diagram of the micro-shaping straight segment unit of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the micro-shaping straight segment unit of the present invention after the optical cable is removed; Figure 8 This is a front view of the micro-shaping straight segment unit of the present invention; Figure 9 For the present invention Figure 8 A sectional view along the middle edge BB; Figure 10 This is a three-dimensional structural diagram of the spliced ​​bend of the present invention. Figure 1 ; Figure 11 This is a three-dimensional structural diagram of the spliced ​​bend of the present invention. Figure 2 ; Figure 12 This is a simplified view of the optical cable routing of the present invention.

[0020] In the diagram: 1. Elastic bend; 2. Outer annular cavity; 3. Circumferential slit; 4. Outer ring; 5. Elastic membrane; 6. Elastic bend; 7. First inlet pipe; 8. Conical groove; 9. Optical cable; 10. Floating pressure limiting carrier; 11. Ring belt; 12. Pressure equalization chamber; 13. Second inlet pipe; 14. Leading edge injection nose; 15. Through-slit; 16. Energy dissipation plate; 17. Thin film area; 18. Splicing bend; 19. Spiral guide groove. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1 to 12 The present invention provides a technical solution: a cooling device for optical cable sheaths, comprising a water tank for holding coolant, and further comprising: 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 control of the optical cable 9 in subsequent bends.

[0023] When this optical cable sheath cooling device is in use, after the optical cable 9 is formed and extruded, it is pulled outward by the traction force at its front end and immersed in a water tank. The cooling water in the tank is used to cool and shape the sheath. In order to reduce the length occupied by the water tank or to further improve the cooling rate within a limited laying area, the optical cable 9 needs to be transported in a bent shape in the water tank to improve cooling efficiency. The specific method is as follows: After entering the water tank, the optical cable 9 will first be suspended by the bend unit, the micro-shaping straight section unit, and the bend tube unit in sequence. The bend unit is designed at the initial bending position of the optical cable 9, that is, the first major bend (closest to the head / sizing box), with the goal of crossing the most dangerous bend with zero contact, avoiding indentation / enlarged ellipticity in the hot soft state. The bend tube unit is placed at the second bend / face-changing bend (when the plane needs to be changed or the path needs to be further lengthened), so that the optical cable 9 can be centered and self-swaying in the subsequent bending sections. Then, the micro-shaping straight section unit is placed at the straight section between the later bending sections, which plays the role of "gently lengthening the path + micro-shaping".

[0024] Specifically, such as Figure 12 The simplified view shown indicates that A represents the suspended curve unit, B represents the bend unit, and C represents the micro-shaping straight section unit. The example of the optical cable 9 traveling in an S-curve shape is not limited to this method. It can also adopt a Z-shaped flipping shape or a spiral rising / falling shape. In this way, by treating different areas of the optical cable 9 in a targeted manner, the optical cable 9 can not only lengthen the cooling path in the short body, but also avoid the marks at the bending points of the optical cable 9 sheath by non-contact support, and can fine-tune the ellipticity of the sheath in the subsequent straight area, thereby improving the performance of the optical cable after cooling and forming.

[0025] In one preferred embodiment, an implementation of a suspended curve unit is provided; The suspended curved unit is an elastic bend 1 that can be flexibly bent, and the elastic bend 1 is installed in the water tank by a bracket. An outer ring 4 that can be eccentrically fitted around the elastic bend 1 is provided. 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.

[0026] 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. The outer ring 4 is connected to the inner wall of the outer ring cavity 2 through the 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. The first liquid inlet pipe 7 is connected to an external independent liquid supply system.

[0027] 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 apex of the arc penetrates and is fixedly connected to the edge ear of the outer ring 4.

[0028] For details, please refer to [link / reference]. Figure 1-5 First, the bending of the elastic bend 1 can be controlled according to the initial bending angle, and the angle can be the same as the initial bending angle. It can be installed in the water tank using a bracket. Simultaneously, when the elastic bend 1 bends, the elastic bend plate 6 on its inner arc surface also bends and pushes against the outer ring 4, moving eccentrically outwards. Figure 3 and Figure 4 The diagrams show the outer ring 4 and the elastic bend 1 in concentric and eccentric states, respectively. When the outer ring 4 and the elastic bend 1 are eccentric, the obstruction of the circumferential slit 3 at the inner arc position of the elastic bend 1 will increase, while the obstruction at the outer arc position will decrease. Figure 4 As shown in h1 and h2, this reduces the water flow from the circumferential slit 3 at the inner arc position and increases the water flow from the circumferential slit 3 at the outer arc position, thereby deflecting the flow rate and pressure towards the outer arc. When the external independent liquid supply system injects coolant into the pressure supply space through the first liquid inlet pipe 7, it will be ejected from the circumferential slit 3. The thin jet ejected from the outer arc circumferential slit 3 will adhere to the inner wall of the outer arc due to the Coanda effect to form a high-speed liquid film, while the inner arc circumferential slit 3 will be ejected at low pressure, mainly playing the role of replenishing liquid and stabilizing the film. Furthermore, the jets on both sides engulf the "main flow" in the elastic bend 1 into a superimposed flow state of liquid film covering the wall and axial flow in the middle. From the perspective of cross-section, the outer arc liquid film will generate higher dynamic and static pressure, forming a non-contact "water cushion" between the outer circle of the optical cable 9 and the wall. Its normal support force increases with the jet pressure and film thickness gradient. The liquid film provides uniform normal support to the optical cable 9, which counteracts gravity and bending-induced normal loads, thereby avoiding physical contact. Furthermore, the pressure difference between the outside and the inside creates a radial pressure gradient on the cross-section, pushing the optical cable 9 toward the geometric center and returning it to the central channel, achieving the effect of non-contact support.

[0029] It is worth mentioning that the above structure can be designed in multiple sets on the elastic bend 1, and the liquid supply system between each set is independently controlled. In this way, the liquid film of the previous ring reaches the attenuation zone and the next ring takes over to "replenish energy" in a "multi-stage jet relay" manner. Therefore, the entire bend is always covered with a continuous liquid film. At the same time, the outer arc pressure increases from the inlet to the outlet, which offsets the increased bending-induced normal load and momentum loss as the bend progresses.

[0030] In this way, the entire first bend of the optical cable 9, which uses a purely mechanical, pressure-increasing outer arc and pressure-reducing inner arc, relies on liquid film support and centralization. There is no point / line contact, so there will be no roller marks or indentations. Moreover, the pressure difference between the outer and inner sides is a controllable "soft support" that adapts to the degree of bending tightness and quality indicators. The jet continuously refreshes the boundary layer, allowing the surface of the optical cable 9 to be "fixed" first, making the contact / flow field more gentle for subsequent bends and straight lines, thus improving the cooling effect.

[0031] In one preferred embodiment, an implementation of a micro-straight segment unit is provided; 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 side skirt film supply structures 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 belt 11 for gently drawing the liquid film away.

[0032] The ring belt 11 is connected by two drive rollers, which 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 flanges on the wide surface of the ring belt 11, and both flanges are provided with through-width slits 15. The two through-width slits 15 form a side skirt film supply structure.

[0033] The tail structure includes an energy dissipation plate 16 fixed on the 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.

[0034] For details, please refer to [link / reference]. Figure 6-9 In the straight section of the optical cable 9, the drive roller of the ring belt 11 first rotates under the drive of 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. Secondly, the external independent liquid supply system injects clean water into the pressure equalization chamber 12 through the second liquid inlet pipe 13, and after pressure equalization, it sprays out from the leading edge injection nose 14 and the through-slit 15 respectively. The leading edge injection nose 14 sprays out from the leading edge of the ring belt 11 and the optical cable 9, forming a mainstream channel in the thin film area 17 formed between the ring belt 11 and the outer wall of the optical cable 9. The liquid sprayed from the through-slit 15 on both sides of the ring belt 11 will form a side supplement flow, and finally form 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 serpentine swing of the optical cable 9, making it more stable. It also achieves the effect of micro-shaping of the optical cable 9 by suppressing the swing and filling the valley (reducing the instantaneous ellipticization / jump). Furthermore, since the speed of the ring belt 11 is the same as that of the optical cable 9, and the axial water film reduces the slip friction to almost zero, and the ring belt 11, supported by the floating pressure limiting carrier 10, passes through the axial water film with a limited surface pressure and gently touches the optical cable, when encountering instantaneous impact or eccentricity, the floating pressure limiting carrier 10 can sink and make way, "locking" the normal peak within the safety window, thus avoiding indentation on the sheath surface; By applying low surface pressure to the outer wall of the optical cable 9 using an axial water film, a slight micro-shaping of the outer diameter / ellipticity can be achieved during transportation, thereby improving the performance of the optical cable 9 sheath after cooling and forming.

[0035] It is worth mentioning that a scraper lip or brush roller can also be installed on the floating pressure limiting carrier 10 to remove water and particles adhering to the ring belt 11 during the circulation process below, so as not to bring the dirt back to the film area 17 and ensure the purity of the water film. Furthermore, an energy dissipation plate 16 is installed at the end of the ring belt 11. This allows the axial water film to become a free sheet flow at the end and fall onto the orifice plate, where it is dispersed into many small streams, thus dissipating energy and achieving a gentle end to the axial water film. This prevents the formation of small vortices at the end of the circulation in the tank, which could draw large amounts of water back into the outlet of the film zone 17, resulting in localized negative pressure, membrane rupture, or light contact at the end. This provides a controlled boundary condition for the water film, isolating disturbances outside the film zone 17.

[0036] It is worth noting that baffles can also be designed on both sides of the film zone 17 to further reduce the interference and lateral exchange of cooling water in the external water tank on the axial water film in the film zone 17.

[0037] In one preferred embodiment, an implementation of the pipe bending unit is provided; 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.

[0038] The splicing bend 18 has a de-spinning transition section at the outlet position at the end. The de-spinning 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.

[0039] For details, please refer to [link / reference]. Figure 10-11 The splicing bend 18 is set at the subsequent bend of the optical cable 9 through a structure such as a bracket or bearing, and the splicing is selected according to the angle of the bend. Then, the external independent liquid supply system forms a controllable spiral flow in the splicing bend 18 through the spray nozzle along the spiral guide groove 19. By coordinating the groove rise angle and the spray angle, a radial pressure gradient (larger on the outside and smaller on the inside) is established, generating a "heart suction" effect, allowing the optical cable 9 to automatically approach the center line in the bend. A de-vortex transition section (a straight groove designed parallel to the axis of the splicing bend 18) is set at the rear end of the bend to prevent vortices from affecting the downstream.

[0040] In this way, it can center itself and suppress swaying during bending without the need for hard contact components, while maintaining the continuity of axial traction within the bending segment and reducing disturbance to the downstream segment.

[0041] Similarly, the splicing method can also enable the nozzles to "recharge" the spiral flow in a "multi-segment jet relay" manner, so that it can maintain radial suction.

[0042] It is worth mentioning that the injection nozzle can also be designed as a Venturi-diffraction composite cavity, that is, a three-stage injection nozzle profile of micro-contraction-constant diameter-micro-diffraction. This can increase the circumferential / axial velocity ratio without increasing the pressure, making the central suction stronger and more resistant to separation.

[0043] In summary, by following a sequential and coordinated path of "non-contact liquid film in the first bend → flexible damping and shaping in the straight section → vortex centering in subsequent bends," the traditional pulley / roller hard-contact bending transmission relied upon for cooling in short-fuselage stretching is entirely replaced by a composite guidance system of three "non-contact / low-contact stiffness" methods: water film, flexible, and vortex. Its core lies in actively establishing a liquid film support system with "strong outer arc and weak inner arc" within the bend through the mechanical linkage and pressure distribution of the circumferential slit wall-mounted jet and the eccentric annular cavity—bend angle, achieving suspension and self-centering within the bend. The first bend indentation and elliptical enlargement are eliminated; secondly, the "film supply" (leading edge through-width slit + side skirt) and "bearing" (floating pressure limiting carrier) are decoupled, so that the controlled water film provides damping and "soft mold" micro-shaping in the straight section, and the underwater gentle end is achieved through the energy dissipation plate 16, isolating the crossflow and disturbance in the tank outside the gap of the film area 17; furthermore, the spiral groove + arc tangential jet is superimposed in the splicing bend 18 to form a controllable vortex and radial pressure gradient, generating a "suction core" that is self-centered without the need for physical roller contact.

[0044] The three sections act as mutually independent steady-state inlets: the suspended bend unit protects the most sensitive first bend, the bend tube unit absorbs post-bend residue and maintains a consistent circle, and the micro-shaping straight section unit ensures uninterrupted operation for subsequent bends; independent differential pressure liquid supply throughout the process, with "gentle mixing" of tank water at the end, significantly improves the robustness of film thickness and surface pressure to fluctuations in wire diameter / tension / flow field. Thus, without increasing the fuselage length, a longer effective cooling path and more uniform circumferential heat transfer are achieved, significantly reducing bend marks, surface streaks, and ellipticity, and minimizing the risk of backflow and micro-scratching.

[0045] In one preferred embodiment, the suspended bend unit, the micro-shaping straight section unit, and the bend unit all operate in the coolant, and their supply circuits are independent of each other and are supplied with coolant relative to the tank liquid in a differential pressure manner.

[0046] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended 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 control of the optical cable (9) in subsequent bends.

2. The optical cable sheath cooling device according to claim 1, characterized in that: 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).

3. The optical cable sheath cooling device according to claim 2, characterized in that: 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.

4. The optical cable sheath cooling device according to claim 3, characterized in that: 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 toward 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).

5. 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.

6. The optical cable sheath cooling device according to claim 5, 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.

7. The optical cable sheath cooling device according to claim 5, 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).

8. The optical cable sheath cooling device according to claim 1, characterized in that: 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.

9. The optical cable sheath cooling device according to claim 8, characterized in that: 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).

10. The optical cable sheath cooling device according to any one of claims 1-9, 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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