Optical cable secondary plastic sheathing traction device and traction method

Abstract

The present invention discloses a secondary sheathing traction device and traction method for optical cables, belonging to the technical field of optical cable preparation devices. The device comprises a first traction mechanism, an auxiliary traction mechanism, and a second traction mechanism arranged in sequence along a first direction. The first traction mechanism comprises a first driven wheel and a first driving wheel; the auxiliary traction mechanism comprises a first traction wheel, a dancing wheel, and a second traction wheel; the second traction mechanism comprises a second driven wheel and a second driving wheel; and the position of the first traction wheel is adjustable along the second direction and / or the third direction. When the sleeve in the present application undergoes a tension change, the dancing wheel will sense the tension change in advance and restore the sleeve tension to a preset level by adjusting the rotation speed of the second driving wheel. This is a pre-adjustment method, which avoids the existing traction device from making adjustments after the sleeve is damaged, thereby ensuring the stability of the sleeve tension under high-speed production and avoiding internal optical fiber breakage.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical cable preparation devices, and in particular relates to an optical cable secondary sheathing and pulling device and a pulling method. Background Art

[0002] The secondary fiber sheathing process involves using a suitable polymer material and an extrusion process to coat the fiber with a sleeve equal in length. Typically, a fiber paste is filled between the fiber and the sleeve to ensure waterproofing and allow the fiber to slide within the sleeve, increasing its resistance to tension and lateral pressure.

[0003] During the secondary sheathing of optical fibers, it is necessary to ensure a certain amount of excess length between the sheath and the optical fiber. The optical fiber passes through the pay-off guide wheel and the extruder head and is placed into the sheath. The sheath is filled with fiber paste and is pulled by a traction wheel, and the sheathing structure of the optical fiber and the sheath is locked on the traction wheel. The optical fiber will contact the side wall of the sheath, so that during the winding process of the optical fiber and the sheath, the winding diameter of the optical fiber is slightly smaller than the winding diameter of the sheath, resulting in a certain amount of negative excess length between the optical fiber and the sheath. At the same time, the sheath needs to be cooled and shaped in a cooling water tank, and the sheath shrinks, thereby compensating for the negative excess length generated during the winding process and generating a certain amount of positive excess length between the optical fiber and the sheath. By adjusting the tension of the traction wheel and the tension of the take-up wheel, the cable structure with the required excess length can be obtained.

[0004] The current speed of optical fiber secondary coating production lines is typically stable at around 350m / min. However, as production line speeds gradually increase, the existing secondary coating speed can no longer keep up with the overall production line speed. Increasing the overall secondary coating speed increases the pulling speed of the optical fiber pulley, which intensifies the friction between the sheath and the pulley. This increases the overall pulling force of the pulley on the sheath, which can easily cause internal optical fiber breakage. Summary of the Invention

[0005] In response to one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides an optical cable secondary sheathing pulling device to solve the problem of optical fiber breakage in the existing high-speed optical fiber secondary sheathing production process.

[0006] To achieve the above-mentioned object, the present invention provides an optical cable secondary sheathing pulling device, which comprises a first pulling mechanism, an auxiliary pulling mechanism, and a second pulling mechanism sequentially arranged along a first direction;

[0007] The first traction mechanism includes a first driven wheel and a first driving wheel spaced apart along a first direction;

[0008] The auxiliary traction mechanism comprises a first traction wheel and a second traction wheel spaced apart along a first direction, a dancing wheel is further provided between the first traction wheel and the second traction wheel, and the position of the first traction wheel is adjustable along the second direction and / or the third direction;

[0009] The second traction mechanism includes a second driven wheel and a second driving wheel spaced apart along a first direction, and a cooling water tank is provided between the second driven wheel and the second driving wheel.

[0010] As a further improvement of the present invention, the first driving wheel includes a first rotating shaft extending along the second direction, and a wheel body is provided on the first rotating shaft;

[0011] The wheel body includes a winding section and a traction section arranged in sequence along the second direction, wherein the traction section includes a first surface and a second surface arranged at intervals along the second direction, the first surface and the second surface are arranged at an inclination angle to each other, and the second surface at least partially overlaps with the wheel surface of the first traction wheel along the first direction.

[0012] As a further improvement of the present invention, the first traction mechanism includes a first box body, and the first driven wheel and the first driving wheel are both arranged in the first box body;

[0013] The first rotating shaft passes through the side wall of the first box body along the second direction, and the end of the first rotating shaft away from the wheel body is connected to the first driving mechanism;

[0014] A sealing sleeve is also sleeved on the first rotating shaft, and the sealing sleeve seals the connection between the first rotating shaft and the first box body.

[0015] As a further improvement of the present invention, the sealing sleeve includes a closing section and a receiving section sequentially arranged along the second direction;

[0016] The closed section is arranged toward the first driving mechanism, and the closed section is embedded in the side wall of the first box body; the receiving section is arranged toward the wheel body, and the receiving section forms a bell mouth extending along the second direction, and the outer wall of the receiving section and the outer wall of the closed section form a placement area.

[0017] As a further improvement of the present invention, a plurality of branching mechanisms are further provided on the first box body, and the branching mechanisms and the receiving section at least partially overlap on a plane perpendicular to the second direction.

[0018] As a further improvement of the present invention, two sealing rings are sleeved on the closed section, and the two sealing rings are respectively attached to the two side walls of the first box body.

[0019] As a further improvement of the present invention, a connecting piece is further provided on the side of the closed section away from the receiving section. The connecting piece is attached to the outer wall of the first box body. A plurality of threaded holes are opened on the connecting piece. The connecting piece is connected to the first box body by a plurality of screws.

[0020] As a further improvement of the present invention, the auxiliary traction mechanism includes a second box body, and the first traction wheel and the second traction wheel are both arranged in the second box body;

[0021] The dance wheel includes an induction wheel and a counterweight, the induction wheel and the counterweight are connected through a rocker arm, the induction wheel is arranged in the second box body, the counterweight is arranged outside the second box body, and the rocker arm passes through the side wall of the second box body and connects the induction wheel and the counterweight.

[0022] As a further improvement of the present invention, one end of the pendulum rod is connected to the induction wheel, and the other end thereof is connected to a second rotating shaft, the second rotating shaft passes through the side wall of the second box body, one end of the second rotating shaft extending out of the second box body is connected to a pendulum rod, one end of the pendulum rod is connected to a counterweight, and the other end of the pendulum rod is provided with a sensor.

[0023] As a further improvement of the present invention, a warm water tank is further provided at the bottom of the first box body, a heating mechanism is provided in the warm water tank, and the position of the heating mechanism is adjustable along the third direction. A water inlet pipe is further connected to the side wall of the first box body, and the height of the water inlet pipe along the third direction is higher than the warm water tank;

[0024] The warm water tank is further connected to a water spray pipe, and there are multiple water spray pipes. The water outlet ends of at least some of the water spray pipes are higher than the first driving wheel and the first driven wheel along the third direction.

[0025] The present application also includes a method for secondary sheathing and pulling an optical cable, which is pulled by the above-mentioned optical fiber secondary sheathing and pulling device, comprising the following steps:

[0026] S1. The sleeve penetrates the first traction mechanism along a first direction;

[0027] S101: The casing passes through the first branching mechanism along a first direction and is wound around the winding section of the first driving wheel.

[0028] S102: The casing is led out from the winding section, passes through the second branching mechanism, and is wound onto the first driven wheel; the casing led out from the first driven wheel passes through the first branching mechanism again and is wound onto the winding section of the first driving wheel;

[0029] S103, repeating step S102 multiple times, winding the casing led out of the first driven wheel through the first branching mechanism to the traction section of the first driving wheel;

[0030] S2, leading the casing out of the first traction mechanism and passing through the auxiliary traction mechanism;

[0031] The casing is pulled to the first traction wheel, wrapped around once and then led out, the casing is wound around the second traction wheel and led out, and the dancing wheel is pressed against the surface of the casing;

[0032] S3, leading the casing out of the auxiliary traction mechanism and passing through the second traction mechanism;

[0033] S301: The casing enters the cooling water tank and is pulled and wound onto the second driving pulley. The casing is drawn out from the second driving pulley and wound onto the second driven pulley.

[0034] S302, repeating step S301, winding the sleeve between the second driving wheel and the second driven wheel for multiple turns and then leading it out;

[0035] S4. Roll up the casing.

[0036] As a further improvement of the present invention, the winding method of the casing on the traction section in step S103 is:

[0037] The sleeve led out from the first driven wheel is attached to the first surface and wound, and the sleeve from the first surface is led out and wound to the second surface, and the sleeves do not contact each other between the first surface and the second surface;

[0038] The displacement of the first traction wheel in the second direction and / or the third direction is adjusted so that the casing led out from the second surface is led out in the first direction or away from the second surface.

[0039] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0040] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:

[0041] (1) The optical cable secondary sheathing traction device of the present invention adjusts the overall layout of the traction device so that the sleeve after being pulled and stretched by the first traction mechanism first passes through the dancing wheel of the auxiliary traction mechanism for speed adjustment. When the tension of the sleeve changes accordingly, the dancing wheel first senses the tension change and feeds back the tension change to the second active wheel. The second active wheel adjusts the speed accordingly so that the tension of the sleeve in the second traction mechanism is always at a relatively stable value. Even if there is an instantaneous tension change in the sleeve during the traction process during the high-speed production of the sleeve, the dancing wheel will sense it and adjust it in the first time to avoid damage to the sleeve during the traction and molding process, ensure stable traction of the sleeve under high-speed production, and avoid internal optical fiber breakage.

[0042] (2) The optical cable secondary sheathing pulling device of the present invention is configured by arranging the wheel body in the first driving wheel into the form of a winding section and a pulling section, wherein the winding section cooperates with the line dividing mechanism to realize the pulling and winding of multiple turns of the sleeve without contacting each other, thereby ensuring the stable molding of the sleeve; the pulling section is mainly used to increase the friction with the sleeve to ensure that the first driving wheel can provide a sufficient pulling speed to ensure the efficient secondary sheathing of the optical fiber; at the same time, the pulling section has a first surface and a second surface separated from each other, and the first surface can provide sufficient friction while being led out by transitioning to the second surface, so that the sleeve can ensure sufficient friction with the first driving wheel without contacting each other, thereby ensuring the efficient production of secondary sheathing of the optical fiber.

[0043] (3) The optical cable secondary sheathing pulling device of the present invention sets the first traction wheel to be adjustable in position along the second direction and / or the third direction, so that the sleeve led out from the second surface can be adjusted in position by the first traction wheel, thereby allowing the sleeve to be led out along the first direction or away from the second surface, so as to avoid interference between the sleeve and the second surface, avoid mutual friction and bulging of the sleeve, and ensure the yield rate of the secondary sheathing of the optical fiber.

[0044] (4) The optical cable secondary sheathing and pulling device of the present invention prevents water droplets carried during the cooling of the casing from adhering to the counterweight or the rocker arm, thereby preventing scale from forming on the counterweight or the rocker arm. This ensures the sensitivity of the dancing wheel to tension perception, thereby ensuring the precise adjustment of the dancing wheel to the rotation speed of the second driving wheel, and avoiding the problem of optical fiber breakage caused by tension fluctuations during the casing pulling process.

[0045] (5) The optical cable secondary sheathing and pulling device of the present invention provides a sealing sleeve at the first driving wheel, and seals the connection between the first driving wheel and the first box body through the sealing sleeve, thereby preventing water vapor inside the first box body from escaping to the outside, effectively solving the water seepage problem in the first box body, and preventing water seepage from affecting the rotation of the first driving mechanism, thereby ensuring the high-speed rotation of the first driving wheel. At the same time, the sealing sleeve also includes a bell-shaped receiving section, and the receiving section and the outer wall of the sealing section form a placement area, so that the sleeve that falls off the line from the branching mechanism or the first driving wheel falls on the receiving section instead of contacting the first rotating shaft, thereby preventing the sleeve from being entangled on the first rotating shaft and facilitating the cleaning of the sleeve in the event of a failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a schematic diagram of the overall structure of the optical cable secondary plastic sheathing and pulling device in the prior art;

[0047] Figure 2 This is a schematic diagram of the overall structure of the optical cable secondary plastic sheathing and pulling device in an embodiment of the present invention;

[0048] Figure 3 is a schematic diagram of the overall structure of the first traction mechanism in an embodiment of the present invention;

[0049] Figure 4 2 is a front structural diagram of the first traction mechanism in an embodiment of the present invention;

[0050] Figure 5 yes Figure 4 Schematic diagram of the cross section along the middle line AA;

[0051] Figure 6 This is a schematic cross-sectional view of a wheel body in an embodiment of the present invention;

[0052] Figure 7 2 is a schematic diagram of the overall structure of the sealing sleeve in an embodiment of the present invention;

[0053] Figure 8 Schematic diagram of the overall structure of the line splitting mechanism in an embodiment of the present invention;

[0054] Figure 9 Schematic diagram of the casing being wound around the first driving wheel in an embodiment of the present invention;

[0055] Figure 10 1 is a front structural diagram of an auxiliary traction mechanism according to an embodiment of the present invention;

[0056] Figure 11 1 is a schematic top view of the auxiliary traction mechanism in an embodiment of the present invention;

[0057] Figure 12 It is a schematic diagram of the overall structure of the second traction mechanism in an embodiment of the present invention.

[0058] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0059] 1. First traction mechanism; 2. Auxiliary traction mechanism; 3. Second traction mechanism; 4. Casing;

[0060] 101. First housing; 102. First driving wheel; 103. First driven wheel; 104. Sealing sleeve; 105. Line splitting mechanism; 106. Warm water tank; 107. Water spray pipe;

[0061] 1021. First rotating shaft; 1022. Wheel body; 1023. Winding section; 1024. Traction section; 1025. First surface; 1026. Second surface; 1027. First driving mechanism;

[0062] 1041. Closed section; 1042. Connecting section; 1043. Bell mouth; 1044. Connecting piece;

[0063] 1051, support rod; 1052, limit rod;

[0064] 201, second box; 202, first traction wheel; 203, second traction wheel; 204, dancing wheel;

[0065] 2041, induction wheel; 2042, counterweight; 2043, second rotation axis; 2044, pendulum; 2045, sensor;

[0066] 301. Second driving wheel; 302. Second driven wheel; 303. Cooling water tank. DETAILED DESCRIPTION

[0067] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0068] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0070] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0071] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0072] Example:

[0073] See also Figures 1 to 12 The optical cable secondary sheathing traction device in a preferred embodiment of the present invention includes a first traction mechanism 1, an auxiliary traction mechanism 2, and a second traction mechanism 3 arranged in sequence along a first direction; wherein the first traction mechanism 1 includes a first driven wheel 103 and a first driving wheel 102 arranged at intervals along the first direction, and the first traction mechanism 1 is used to perform a primary traction and stretching of the sleeve 4 and perform preliminary cooling; the auxiliary traction mechanism 2 includes a first traction wheel 202 and a second traction wheel 203 arranged at intervals along the first direction, wherein a dancing wheel 204 is provided between the first traction wheel 202 and the second traction wheel 203, and the position of the first traction wheel 202 is adjustable along the second direction and / or the third direction, so that the sleeve 4 pulled from the first driving wheel 102 is pulled to the first traction wheel 202 along the first direction; further, the second traction mechanism 3 in the present application includes a second driven wheel 302 and a second driving wheel 301 arranged at intervals along the first direction, and a cooling water tank 303 is provided between the second driven wheel 302 and the second driving wheel 301.

[0074] like Figure 1 As shown, in the existing optical fiber secondary sheathing and drawing process, the sleeve 4, which is initially cooled and drawn out from the first drawing mechanism 1, directly enters the second drawing mechanism 3 for secondary cooling. The sleeve 4 is then adjusted in the second drawing mechanism 3 by a dancer 204 at the rear of the second drawing mechanism 3. During this process, the dancer 204 is located after the second drawing mechanism 3. When the sleeve 4 drawn out from the first drawing mechanism 1 experiences tension fluctuations, the dancer 204 cannot immediately sense the tension change. Instead, the sleeve 4 is pulled and stretched by the second drawing mechanism 3, resulting in fiber breakage within the sleeve 4. This is a post-adjustment method and cannot completely solve the problem of internal sleeve breakage in high-speed production.

[0075] Furthermore, in the existing optical fiber secondary sheathing and pulling process, the traction wheels at the cooling water tank 303 are all passive traction wheels, which are adjusted and pulled by the dancing wheel 204 and the driving wheel at the rear section of the cooling water tank 303. During this process, the sleeve 4 is pulled out after only one turn on the driving wheel. Even if the dancing wheel 204 senses the sleeve tension and adjusts the driving wheel speed, the instantaneous speed change imposed on the driving wheel will be directly transmitted to a single sleeve 4, which can easily cause the optical fiber in the sleeve 4 to break directly. In contrast, the present application directly incorporates the second driving wheel 301 into the second pulling mechanism 3, so that multiple turns of sleeve 4 are also wound around the second driving wheel 301. Even if the speed of the second driving wheel 301 is adjusted accordingly, the change in its instantaneous tension will be distributed to multiple sleeves 4, thereby effectively avoiding the problem of optical fiber breakage in the sleeve 4.

[0076] The optical cable secondary sheathing traction device of the present invention adjusts the overall layout of the traction device so that the sleeve 4, after being pulled and stretched by the first traction mechanism 1, first passes through the dancing wheel 204 of the auxiliary traction mechanism 2 for speed adjustment. When the tension of the sleeve 4 changes accordingly, the dancing wheel 204 first senses the tension change and feeds back the tension change to the second driving wheel 301. The second driving wheel 301 adjusts the rotation speed accordingly, so that the tension of the sleeve 4 in the second traction mechanism 3 is always at a relatively stable value. Even if there is an instantaneous tension change in the sleeve 4 during the traction process during the high-speed production process of the sleeve 4, the dancing wheel 204 will sense it and adjust it in the first time to avoid damage to the sleeve 4 during the traction and molding process, thereby ensuring stable traction of the sleeve 4 under high-speed production and avoiding internal optical fiber breakage.

[0077] At the same time, in the prior art, the two transmission wheels in the second traction mechanism 3 are both driven wheel structures, and it is also necessary to set an additional driving wheel after the dancing wheel 204 to pull and stretch the sleeve 4 in the second traction mechanism 3, such as Figure 1 As shown. In the present application, a second driving wheel 301 similar to the first traction mechanism 1 is set inside the second traction mechanism 3, which simplifies the overall production line length of the optical fiber secondary sheathing traction device as a whole, saves the device floor space, and saves space. It is worth noting that the first driving wheel 102 and the second driving wheel 301 in the present application both have a driving structure, which is mainly used to pull the sleeve 4; the first driven wheel 103 and the second driven wheel 302 are both driven structures, which are driven to rotate through the sleeve 4 under the rotation of the first driving wheel 102 and the second driving wheel 301.

[0078] Preferably, the first direction in this application is the arrangement direction of the optical cable secondary sheathing traction device, that is, the production and preparation direction of the sleeve 4, the second direction is the axial direction of the first rotating shaft 1021, and the third direction is the vertical direction.

[0079] Furthermore, as a preferred embodiment of the present invention, the first traction mechanism 1 in the present application includes a first box body 101, the first driving wheel 102 and the first driven wheel 103 are both arranged inside the first box body 101, wherein the first driving wheel 102 includes a first rotating shaft 1021 extending along the second direction, and a wheel body 1022 is provided on the first rotating shaft 1021, and the wheel body 1022 is driven to rotate by the first rotating shaft 1021, and the wheel body 1022 includes a winding section 1023 and a traction section 1024 arranged in sequence along the second direction, wherein the winding section 1023 is an annular surface as a whole, and is used for the sleeve 4 to be wound multiple times on the winding section 1023; wherein the traction section 1024 includes a first surface 1025 and a second surface 1026 arranged at intervals along the second direction, and the first surface 1025 and the second surface 1026 are arranged at an inclination angle to each other. The winding section 1023 is only used for winding multiple turns of the sleeve 4, and its contact area with the wheel body 1022 is relatively small. The present application mainly contacts the sleeve 4 through the first surface 1025 and the second surface 1026. The friction between the sleeve 4 and the traction section 1024 enables the first active wheel 102 to drive the sleeve 4 to be pulled and stretched. At the same time, the sleeve 4 is wound on the first surface 1025 and then transitions to the second surface 1026, so that the sleeve 4 and the winding section 1023 have sufficient contact surface. At the same time, the sleeve 4 does not contact each other in the second direction, avoiding mutual friction and bulging of the sleeve 4, so as to ensure the yield rate of the secondary sheathing of the optical fiber.

[0080] Optionally, the first driving wheel 102 and the first driven wheel 103 in the present application have the same structure. By setting the first driven wheel 103 to have the same structure as the first driving wheel 102, the contact problem during the traction process of the casing 4 can be avoided.

[0081] At the same time, the second surface 1026 in the present application at least partially overlaps with the wheel surface of the first traction wheel 202 along the first direction. The first traction wheel 202 in the present application is positionally adjustable along the second direction and / or the third direction, so that the casing 4 drawn out from the second surface 1026 can always be drawn along the first direction to the wheel surface of the first traction wheel 202, thereby preventing the casing 4 drawn out from the second surface 1026 from approaching the first surface 1025, which would cause the casing 4 to contact bulges.

[0082] Further preferably, the first housing 101 of the present application is further provided with a plurality of line-dividing mechanisms 105. The line-dividing mechanisms 105 include a support rod 1051 extending in the second direction, and a plurality of limiting rods 1052 arranged perpendicularly along the axial direction of the support rod 1051. The plurality of limiting rods 1052 are spaced apart along the second direction. The limiting rods 1052 are primarily used to separate the sleeves 4 wound around the first driving wheel 102 and the first driven wheel 103 to prevent contact between the sleeves 4 and affect the cooling and forming effect of the sleeves 4.

[0083] Furthermore, the limiting rod 1052 can constrain the sleeve 4 on one side of the first surface 1025 to increase the friction between the sleeve 4 and the first surface 1025, while preventing the sleeve 4 from approaching the second surface 1026; the sleeve 4 at the second surface 1026 is restricted by the first traction wheel 202, thereby separating the sleeves 4 on the first surface 1025 and the second surface 1026 from each other to avoid contact between the two.

[0084] Further preferably, the first rotating shaft 1021 in the present application passes through the side wall of the first housing 101 along the second direction, and the end of the first rotating shaft 1021 facing away from the wheel body 1022 is connected to the first driving mechanism 1027. At the same time, a sealing sleeve 104 is also provided on the first rotating shaft 1021, and the sealing sleeve 104 seals the connection between the first rotating shaft 1021 and the first housing 101. In the present application, a water-cooling structure is provided inside the first housing 101 to cool and shape the sleeve 4. In order to prevent water vapor and the like inside the first housing 101 from leaking to the outside of the first housing 101, a sealing sleeve 104 is provided at the connection between the first rotating shaft 1021 and the first housing 101 to seal the connection seam between the two and prevent water vapor from overflowing. The first driving mechanism 1027 is provided outside the first housing 101 to prevent internal water vapor and the like from affecting the operation of the first driving mechanism 1027 and to ensure the stable rotation and traction of the first driving wheel 102.

[0085] Furthermore, the sealing sleeve 104 of the present application includes a sealing section 1041 and a receiving section 1042, which are arranged in sequence along the second direction. The sealing section 1041 is arranged toward the first drive mechanism 1027 and is embedded in the side wall of the first housing 101. The receiving section 1042 is arranged toward the wheel body 1022 and has a bell mouth 1043 extending along the second direction. A placement area is formed at the junction of the outer wall of the receiving section 1042 and the outer wall of the sealing section 1041. The sealing sleeve 104 of the present application can seal the connection between the first housing 101 and the first rotating shaft 1021, preventing moisture from seeping out of the first housing 101. At the same time, the receiving section 1042 with a trumpet-shaped mouth 1043 can receive the sleeve 4 that crosses the line from the line-dividing mechanism 105 or the first driving wheel 102, avoiding direct contact between the sleeve 4 and the first rotating shaft 1021, and avoiding winding of the sleeve 4 on the first rotating shaft 1021, thereby facilitating the cleaning of the sleeve 4 in case of a fault.

[0086] Furthermore, the sealing section 1041 of the present application is also provided with two sealing rings, which are respectively attached to the two side walls of the first box body 101. The sealing rings are used to cooperate with the sealing sleeve 104 to seal the connection between the first rotating shaft 1021 and the first box body 101 to prevent water vapor from leaking out.

[0087] Further preferably, a connecting piece 1044 is provided on the side of the closing section 1041 facing away from the receiving section 1042. The connecting piece 1044 is attached to the outer wall of the first housing 101. The connecting piece 1044 is provided with a plurality of threaded holes, and the connecting piece 1044 is connected and fixed to the side wall of the first housing 101 by a plurality of screws. The connecting piece 1044 is used to cooperate with the side wall of the first housing 101 to fix the sealing sleeve 104 to the first housing 101.

[0088] Correspondingly, a warm water tank 106 is provided at the bottom of the first box body 101 in the present application. A heating mechanism is provided in the warm water tank 106, and the position of the heating mechanism along the third direction is adjustable. A water inlet pipe is also connected to the side wall of the first box body 101. The height of the water inlet pipe along the third direction is higher than that of the warm water tank 106. At the same time, the warm water tank 106 is also connected to a water spray pipe 107. There are multiple water spray pipes 107, and the water outlet ends of at least some of the water spray pipes 107 are higher than the first driving wheel 102 and the first driven wheel 103 along the third direction. The optical cable secondary sheathing traction device in the present application is a segmented cooling structure, wherein the first traction mechanism 1 is filled with warm water and the second traction mechanism 3 is filled with cold water, so as to achieve the purpose of gradually cooling the casing 4 and avoid the casing 4 from shrinking and deforming due to sudden cooling. Based on this, the first housing 101 of the present application is provided with a warm water tank 106 inside. A heating mechanism is used to control the water temperature. The heating mechanism is adjustable along the third direction to heat cooling water at different water levels. A water spray pipe 107 is used to spray the warm water in the warm water tank 106 throughout the first housing 101 to cool the sleeve 4 inside the first housing 101 and facilitate the molding of the sleeve 4. It is worth noting that the water spray pipe 107 is provided at various locations on the side wall of the first housing 101, and the water outlet end of the water spray pipe 107 is provided toward the first driving wheel 102 and the first driven wheel 103 to cool the sleeve 4.

[0089] Furthermore, as a preferred embodiment of the present invention, the auxiliary traction mechanism 2 in the present application includes a second box body 201, and the first traction wheel 202 and the second traction wheel 203 are both arranged in the second box body 201; the dancing wheel 204 includes an induction wheel 2041 and a counterweight 2042, and the induction wheel 2041 and the counterweight 2042 are connected through a rocker rod 2044, the induction wheel 2041 is arranged in the second box body 201, and the counterweight 2042 is arranged outside the second box body 201, and the rocker rod 2044 passes through the side wall of the second box body 201 and connects the induction wheel 2041 and the counterweight 2042. The conventional dancing wheel 204 structure is arranged inside the same box. Based on the special environment in this application, the surface of the sleeve 4 will carry water vapor, resulting in the residual water vapor on the surface of the sleeve 4 being retained in the auxiliary traction mechanism 2 when the sleeve 4 passes through the auxiliary traction mechanism 2. Since the dancing wheel 204 is a lever structure as a whole, when the water vapor adheres to the counterweight 2042 or the sensor 2045, it will cause the tension feedback of the dancing wheel 204 to deviate, resulting in adjustment error of the second active wheel 301, causing the tension of the sleeve 4 to be too large or too small, resulting in internal fiber breakage or curling of the sleeve 4.

[0090] Further preferably, one end of the pendulum rod 2044 in the present application is connected to the sensing wheel 2041, and the other end is connected to the second rotating shaft 2043. The second rotating shaft 2043 passes through the side wall of the second housing 201, and the end of the second rotating shaft 2043 extending from the second housing 201 is connected to the pendulum rod 2044, which is connected to the counterweight 2042. A sensor 2045 is provided at the other end of the pendulum rod 2044. In the present application, the swinging of the sensing wheel 2041 under the influence of tension is transmitted to the pendulum rod 2044 via the second rotating shaft 2043, and the tension is fed back to the sensor 2045 through the swinging of the pendulum rod 2044. Finally, the tension data is fed back to the second driving wheel 301 via the sensor 2045, thereby adjusting the rotation speed of the second driving wheel 301 and adjusting the tension of the casing 4. It is worth noting that the rocker arm 2044 is in a “Z” shape as a whole, the second rotation axis 2043 is a part of the rocker arm 2044 , and both ends of the rocker arm 2044 are located inside and outside the first box body 101 respectively.

[0091] Preferably, the second traction wheel 203 among the present application can be adjusted along the second direction and / or the third direction equally. The second traction wheel 203 is mainly adjusted according to the position of the first traction wheel 202, so that after the two positions are adjusted in the second direction and / or the third direction, the wheel surface of the first traction wheel 202 and the second traction wheel 203 is aligned along the first direction, and is at the same height in the third direction. When the two correspondences are adjusted, and the tension force of the loose sleeve 4 does not have corresponding changes, the induction wheel 2041 is in horizontal position, facilitates the traction tension of the dancing wheel 204 pairs of sleeves 4 to be fed back. Alternatively, the position of the above-mentioned first traction wheel 202 and or the second traction wheel 203 is all adjusted by adjusting block, and its adjustment mode is identical or similar with conventional traction wheel position adjustment mode, and other structures that can adjust the first traction wheel 202 or the second traction wheel 203 positions all can, and will not repeat them here.

[0092] Furthermore, based on the optical cable secondary sheathing and pulling device in the present application, the present application also includes a corresponding optical cable secondary sheathing and pulling method, which includes the following steps:

[0093] S1. The sleeve 4 is inserted into the first pulling mechanism 1 along a first direction. It should be noted that, before the sleeve 4 is introduced into the first pulling mechanism 1, the sleeve 4 preparation and optical fiber insertion processes have been completed.

[0094] S101: The sleeve 4 passes through the first line dividing mechanism 105 along the first direction and is wound around the winding section 1023 of the first driving wheel 102.

[0095] S102: The sleeve 4 is led out from the winding section 1023, passes through the second line dividing mechanism 105, and is wound onto the first driven wheel 103; the sleeve 4 led out from the first driven wheel 103 passes through the first line dividing mechanism 105 again and is wound onto the winding section 1023 of the first driving wheel 102;

[0096] S103, repeat step S102 multiple times, winding the casing 4 led out of the first driven wheel 103 through the first branching mechanism 105 to the traction section 1024 of the first driving wheel 102;

[0097] S2, leading the sleeve 4 out of the first traction mechanism 1 and passing through the auxiliary traction mechanism 2;

[0098] The sleeve 4 is pulled to the first traction wheel 202 and wound once before being led out. The sleeve 4 is wound to the second traction wheel 203 and led out. The dancing wheel 204 is pressed against the surface of the sleeve 4.

[0099] S3, leading the sleeve 4 out of the auxiliary traction mechanism 2 and passing through the second traction mechanism 3;

[0100] S301: The casing 4 enters the cooling water tank 303 and is pulled and wound around the second driving wheel 301. The casing 4 is drawn out from the second driving wheel 301 and wound around the second driven wheel 302.

[0101] S302, repeat step S301, wrap the sleeve 4 between the second driving wheel 301 and the second driven wheel 302 for multiple turns and then lead it out;

[0102] S4, rolling up the sleeve 4.

[0103] Further preferably, in step S103, the winding method of the sleeve 4 on the traction section 1024 is:

[0104] The sleeve 4 drawn out from the first driven wheel 103 is attached to the first surface 1025 and wound around it. The sleeve 4 drawn out from the first surface 1025 is wound around the second surface 1026. The sleeve 4 does not contact the first surface 1025 and the second surface 1026.

[0105] The displacement of the first traction wheel 202 along the second direction and / or the third direction is adjusted so that the casing 4 led out from the second surface 1026 is led out along the first direction or away from the second surface 1026 .

[0106] Furthermore, in this application, the dancing wheel 204 adjusts the speed of the second driving wheel 301 in the following manner:

[0107] The sleeve 4 is pulled by the second driving wheel 301 and the tension increases, the induction wheel 2041 is correspondingly lifted along the third direction, the counterweight 2042 is lowered along the third direction, and the sensor 2045 senses the lowering of the counterweight 2042;

[0108] The sensor 2045 converts the descending distance of the counterweight 2042 into the tension sensed by the dancing wheel 204; the sensor 2045 controls the second driving wheel 301 to reduce the rotation speed, the traction tension on the sleeve 4 becomes smaller, and the sensing wheel 2041 returns to the horizontal position.

[0109] On the contrary, when the tension of the casing 4 caused by the second driving wheel 301 decreases, the sensing wheel 2041 presses down the casing 4, the sensing wheel 2041 descends along the third direction, the counterweight 2042 ascends along the third direction, and the sensor 2045 senses the ascending of the counterweight 2042.

[0110] The sensor 2045 converts the rising distance of the counterweight 2042 into the tension sensed by the dancing wheel 204. The sensor 2045 controls the second driving wheel 301 to increase the rotation speed. The traction tension on the sleeve 4 increases, and the sensing wheel 2041 returns to the horizontal position.

[0111] During the process of adjusting the traction tension of the sleeve 4 by the dancer 204, the production speed of the sleeve 4 is basically constant. The main sources of variation in the traction tension of the sleeve 4 are the first driving wheel 102 and the second driving wheel 301. The first driving wheel 102 is in front, and the second driving wheel 301 is in the back. When the rotation speeds of the first driving wheel 102 and the second driving wheel 301 deviate, the sleeve 4 will be pulled accordingly, causing the optical fiber inside the sleeve 4 to break. Therefore, the rotation speeds of the first driving wheel 102 and the second driving wheel 301 are basically constant. When the sleeve 4 experiences an abnormality or slippage, the traction speed of the sleeve 4 changes. At this time, the dancer 204 can sense the change in the tension of the sleeve 4 and provide corresponding feedback. Then, by changing the rotation speed of the second driving wheel 301, the sleeve 4 is relaxed or tightened accordingly, maintaining a constant traction tension on the sleeve 4, avoiding the problem of internal optical fiber breakage caused by the change in the tension of the sleeve 4 during the traction process.

[0112] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A secondary sheathing and pulling device for optical cable, characterized in that: It includes a first traction mechanism, an auxiliary traction mechanism and a second traction mechanism which are sequentially arranged along a first direction; The first traction mechanism includes a first driven wheel and a first driving wheel spaced apart along a first direction; the first driving wheel includes a first rotating shaft extending along a second direction, and a wheel body is provided on the first rotating shaft; The auxiliary traction mechanism comprises a first traction wheel and a second traction wheel spaced apart along a first direction, a dancing wheel is further provided between the first traction wheel and the second traction wheel, and the position of the first traction wheel is adjustable along the second direction and / or the third direction; The wheel body includes a winding section and a traction section sequentially arranged along the second direction, wherein the traction section includes a first surface and a second surface spaced apart along the second direction, the first surface and the second surface are arranged at an angle to each other, and the second surface at least partially overlaps with the wheel surface of the first traction wheel along the first direction; The second traction mechanism includes a second driven wheel and a second driving wheel spaced apart along the first direction, and a cooling water tank is provided between the second driven wheel and the second driving wheel; The first direction is the arrangement direction of the optical cable secondary sheathing and pulling device, the second direction is the axial direction of the first rotating shaft, and the third direction is the vertical direction.

2. The optical cable secondary sheathing and pulling device according to claim 1, characterized in that: The first traction mechanism includes a first box body, and the first driven wheel and the first driving wheel are both arranged in the first box body; The first rotating shaft passes through the side wall of the first box body along the second direction, and the end of the first rotating shaft away from the wheel body is connected to the first driving mechanism; A sealing sleeve is also sleeved on the first rotating shaft, and the sealing sleeve seals the connection between the first rotating shaft and the first box body.

3. The optical cable secondary sheathing and pulling device according to claim 2, characterized in that: The sealing sleeve comprises a closing section and a receiving section sequentially arranged along the second direction; The closed section is arranged toward the first driving mechanism, and the closed section is embedded in the side wall of the first box body; the receiving section is arranged toward the wheel body, and the receiving section forms a bell mouth extending along the second direction, and the outer wall of the receiving section and the outer wall of the closed section form a placement area.

4. The optical cable secondary sheathing and pulling device according to claim 3, characterized in that: The first box body is further provided with a plurality of branching mechanisms, and the branching mechanisms and the receiving section at least partially overlap on a plane perpendicular to the second direction.

5. The optical cable secondary sheathing and pulling device according to claim 3, characterized in that: The closed section is also sleeved with two sealing rings, which are respectively attached to the two side walls of the first box body.

6. The optical cable secondary sheathing and pulling device according to claim 3, characterized in that: A connecting piece is further provided on the side of the closing section away from the receiving section. The connecting piece is attached to the outer wall of the first box body. A plurality of threaded holes are opened on the connecting piece. The connecting piece is connected to the first box body by a plurality of screws.

7. The optical cable secondary coating and pulling device according to any one of claims 1 to 4, characterized in that: The auxiliary traction mechanism includes a second box body, and the first traction wheel and the second traction wheel are both arranged in the second box body; The dance wheel includes an induction wheel and a counterweight, the induction wheel and the counterweight are connected through a rocker arm, the induction wheel is arranged in the second box body, the counterweight is arranged outside the second box body, and the rocker arm passes through the side wall of the second box body and connects the induction wheel and the counterweight.

8. The optical cable secondary sheathing and pulling device according to claim 7, characterized in that: One end of the pendulum rod is connected to the induction wheel, and the other end is connected to the second rotating shaft. The second rotating shaft passes through the side wall of the second box body. One end of the second rotating shaft extending out of the second box body is connected to the pendulum rod. One end of the pendulum rod is connected to a counterweight, and the other end of the pendulum rod is provided with a sensor.

9. The optical cable secondary sheathing and pulling device according to any one of claims 1 to 6, characterized in that: The first traction mechanism includes a first box body, the first driven wheel and the first driving wheel are both arranged in the first box body, a warm water tank is further provided at the bottom of the first box body, a heating mechanism is provided in the warm water tank, and the position of the heating mechanism is adjustable along the third direction, and a water inlet pipe is further connected to the side wall of the first box body, and the height of the water inlet pipe along the third direction is higher than the warm water tank; The warm water tank is further connected to a water spray pipe, and there are multiple water spray pipes. The water outlet ends of at least some of the water spray pipes are higher than the first driving wheel and the first driven wheel along the third direction.

10. A method for pulling an optical cable after secondary sheathing, wherein the method is performed by using the optical cable secondary sheathing pulling device according to any one of claims 1 to 9, wherein: The steps include: S1. The sleeve penetrates the first traction mechanism along a first direction; S101: The casing passes through the first branching mechanism along a first direction and is wound around the winding section of the first driving wheel. S102: The casing is led out from the winding section, passes through the second branching mechanism, and is wound onto the first driven wheel; the casing led out from the first driven wheel passes through the first branching mechanism again and is wound onto the winding section of the first driving wheel; S103, repeating step S102 multiple times, winding the casing led out of the first driven wheel through the first branching mechanism to the traction section of the first driving wheel; S2, leading the casing out of the first traction mechanism and passing through the auxiliary traction mechanism; The casing is pulled to the first traction wheel, wrapped around once and then led out, the casing is wound around the second traction wheel and led out, and the dancing wheel is pressed against the surface of the casing; S3, leading the casing out of the auxiliary traction mechanism and passing through the second traction mechanism; S301: The casing enters the cooling water tank and is pulled and wound onto the second driving pulley. The casing is drawn out from the second driving pulley and wound onto the second driven pulley. S302, repeating step S301, winding the sleeve between the second driving wheel and the second driven wheel for multiple turns and then leading it out; S4. Roll up the casing.

11. The optical cable secondary sheathing and pulling method according to claim 10, characterized in that: In step S103, the sleeve is wound on the traction section in the following manner: The sleeve led out from the first driven wheel is attached to the first surface and wound, and the sleeve from the first surface is led out and wound to the second surface, and the sleeves do not contact each other between the first surface and the second surface; The displacement of the first traction wheel in the second direction and / or the third direction is adjusted so that the casing led out from the second surface is led out in the first direction or away from the second surface.

Images