CA3067014A1 - Process for producing loose tube for totally gel-free fiber optic cable and device for molding the same - Google Patents
Process for producing loose tube for totally gel-free fiber optic cable and device for molding the same Download PDFInfo
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- CA3067014A1 CA3067014A1 CA3067014A CA3067014A CA3067014A1 CA 3067014 A1 CA3067014 A1 CA 3067014A1 CA 3067014 A CA3067014 A CA 3067014A CA 3067014 A CA3067014 A CA 3067014A CA 3067014 A1 CA3067014 A1 CA 3067014A1
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- loose tube
- hole
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- optic cable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0075—Light guides, optical cables
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The present disclosure provides a process for producing a loose tube for a totally gel-free fiber optic cable and a device for molding the same, and relates to the technical field of processing and manufacturing of optical fibers and optical fiber cables. The process for producing a loose tube for a totally gel-free fiber optic cable according to the present disclosure comprises: extruding a loose tube material into a tubular loose tube by a loose tube molding device;
filling a compressed gas into the loose tube; cooling the loose tube;
threading an optical fiber or an optical fiber ribbon into the loose tube. The process for producing a loose tube for a totally gel-free fiber optic cable according to the present disclosure alleviates the technical problem in the related art that the loose tube tends to have a flat shape when molded by extrusion, and the optical fiber is likely to adhere to the loose tube, which causes an unsatisfactory attenuation index of the optical fiber.
filling a compressed gas into the loose tube; cooling the loose tube;
threading an optical fiber or an optical fiber ribbon into the loose tube. The process for producing a loose tube for a totally gel-free fiber optic cable according to the present disclosure alleviates the technical problem in the related art that the loose tube tends to have a flat shape when molded by extrusion, and the optical fiber is likely to adhere to the loose tube, which causes an unsatisfactory attenuation index of the optical fiber.
Description
Process for Producing Loose Tube for Totally Gel-free Fiber Optic Cable and Device for Molding the Same Cross-Reference to Related Applications The present disclosure claims priority of Chinese Patent Application No.
201811596468.6, filed with the Chinese Patent Office on December 25, 2018, entitled "Process for Producing Loose tube for Totally Gel-free Fiber Optic Cable and Device for Molding the Same".
Technical Field The present disclosure relates to the technical field of processing and manufacturing of optical fibers and optical fiber cables, and in particular to a process for producing a loose tube for a totally gel-free fiber optic cable and to a device for molding the same.
Background Art At present, loose tubes used in optical fiber cables are mainly of the gel-filled (grease-filled) type, that is to say, a loose tube is filled with gel to protect an optical fiber and ensure that the loose tube for the optical fiber is impermeable to water; and when the loose tube is being molded, the filled gel also serves the function of supporting and rounding off the loose tube.
In construction using a totally gel-free fiber optic cable which is a grease-free optical fiber cable, a process of removing the gel is omitted, so that the construction efficiency is improved, and also environmental pollution is avoided, and hence it is an environmentally-friendly optical fiber cable for outdoor use.
When the loose tube in the totally gel-free fiber optic cable is molded by extrusion, the loose tube tends to have a flat shape, and the optical fiber is prone to adhere to the loose tube, which causes an unsatisfactory attenuation index of the optical fiber.
Summary The objects of the present disclosure include, for example, providing a process for producing a loose tube for a totally gel-free fiber optic cable to alleviate the technical problem in the related art that the loose tube tends to have a flat shape when being molded by extrusion, and the optical fiber is prone to adhere to the loose tube, which causes an unsatisfactory attenuation index of the optical fiber.
The objects of the present disclosure further includes, for example, providing a device for molding a loose tube for a totally gel-free fiber optic cable to alleviate the technical problem in the related art that the loose tube tends to have a flat shape when being molded by extrusion, and the optical fiber is prone to adhere to the loose tube, which causes an unsatisfactory attenuation index of the optical fiber.
Embodiments of the present disclosure are implemented as follows:
An embodiment of the present disclosure provides a process for producing a loose tube for a totally gel-free fiber optic cable, comprising steps of:
extruding a loose tube material into a loose tube of a tubular shape by a loose tube molding device;
filling a compressed gas into the loose tube;
cooling the loose tube;
to threading an optical fiber or an optical fiber ribbon into the loose tube.
An embodiment of the present disclosure provides a process for producing a loose tube for a totally gel-free fiber optic cable, comprising steps of:
filling a compressed gas into a tube cavity of a loose tube during extrusion and molding.
Optionally, the molded loose tube is cooled.
Optionally, the process for producing a loose tube for a totally gel-free fiber optic cable further comprises:
threading an optical fiber or an optical fiber ribbon into the tube cavity of the loose tube.
Optionally, the process step of filling the compressed gas into the tube cavity of the loose tube comprises:
purifying and dehumidifying the compressed gas, and filling the compressed gas into the loose tube through a gas storage tank and a flow controller.
Optionally, the process step of cooling the loose tube comprises:
winding the loose tube around a primary pulling roller after the loose tube passes through a first cooling groove;
unwinding the loose tube wound around the primary pulling roller and passing the loose tube through a second cooling groove and an auxiliary pulling roller;
introducing the loose tube into a take-up device and taking up the loose tube on a take-up reel of the take-up device.
An embodiment of the present disclosure further provides a device for molding a loose tube for a totally gel-free fiber optic cable, comprising: a head, a mold core, and a mold sleeve, wherein the head is provided with a ventilation hole, the mold core is mounted to the head, the mold core is provided with a mold core through hole, and the mold core through hole communicates with the
201811596468.6, filed with the Chinese Patent Office on December 25, 2018, entitled "Process for Producing Loose tube for Totally Gel-free Fiber Optic Cable and Device for Molding the Same".
Technical Field The present disclosure relates to the technical field of processing and manufacturing of optical fibers and optical fiber cables, and in particular to a process for producing a loose tube for a totally gel-free fiber optic cable and to a device for molding the same.
Background Art At present, loose tubes used in optical fiber cables are mainly of the gel-filled (grease-filled) type, that is to say, a loose tube is filled with gel to protect an optical fiber and ensure that the loose tube for the optical fiber is impermeable to water; and when the loose tube is being molded, the filled gel also serves the function of supporting and rounding off the loose tube.
In construction using a totally gel-free fiber optic cable which is a grease-free optical fiber cable, a process of removing the gel is omitted, so that the construction efficiency is improved, and also environmental pollution is avoided, and hence it is an environmentally-friendly optical fiber cable for outdoor use.
When the loose tube in the totally gel-free fiber optic cable is molded by extrusion, the loose tube tends to have a flat shape, and the optical fiber is prone to adhere to the loose tube, which causes an unsatisfactory attenuation index of the optical fiber.
Summary The objects of the present disclosure include, for example, providing a process for producing a loose tube for a totally gel-free fiber optic cable to alleviate the technical problem in the related art that the loose tube tends to have a flat shape when being molded by extrusion, and the optical fiber is prone to adhere to the loose tube, which causes an unsatisfactory attenuation index of the optical fiber.
The objects of the present disclosure further includes, for example, providing a device for molding a loose tube for a totally gel-free fiber optic cable to alleviate the technical problem in the related art that the loose tube tends to have a flat shape when being molded by extrusion, and the optical fiber is prone to adhere to the loose tube, which causes an unsatisfactory attenuation index of the optical fiber.
Embodiments of the present disclosure are implemented as follows:
An embodiment of the present disclosure provides a process for producing a loose tube for a totally gel-free fiber optic cable, comprising steps of:
extruding a loose tube material into a loose tube of a tubular shape by a loose tube molding device;
filling a compressed gas into the loose tube;
cooling the loose tube;
to threading an optical fiber or an optical fiber ribbon into the loose tube.
An embodiment of the present disclosure provides a process for producing a loose tube for a totally gel-free fiber optic cable, comprising steps of:
filling a compressed gas into a tube cavity of a loose tube during extrusion and molding.
Optionally, the molded loose tube is cooled.
Optionally, the process for producing a loose tube for a totally gel-free fiber optic cable further comprises:
threading an optical fiber or an optical fiber ribbon into the tube cavity of the loose tube.
Optionally, the process step of filling the compressed gas into the tube cavity of the loose tube comprises:
purifying and dehumidifying the compressed gas, and filling the compressed gas into the loose tube through a gas storage tank and a flow controller.
Optionally, the process step of cooling the loose tube comprises:
winding the loose tube around a primary pulling roller after the loose tube passes through a first cooling groove;
unwinding the loose tube wound around the primary pulling roller and passing the loose tube through a second cooling groove and an auxiliary pulling roller;
introducing the loose tube into a take-up device and taking up the loose tube on a take-up reel of the take-up device.
An embodiment of the present disclosure further provides a device for molding a loose tube for a totally gel-free fiber optic cable, comprising: a head, a mold core, and a mold sleeve, wherein the head is provided with a ventilation hole, the mold core is mounted to the head, the mold core is provided with a mold core through hole, and the mold core through hole communicates with the
2 ventilation hole; the mold sleeve is sleeved around an outer circumference of the mold core and a molding space is formed between the mold core and the mold sleeve, and the molding space communicates with the outside.
Optionally, the mold core comprises a first tapered section and a first cylindrical section, wherein the first cylindrical section is connected with an end of the first tapered section having a smaller inner diameter; the mold sleeve comprises a second tapered section and a second cylindrical section, wherein the second cylindrical section is connected with an end of the second tapered section having a smaller inner diameter; and the second tapered section is sleeved around an outer circumference of the first tapered section and a tapered space is defined therebetween, the second cylindrical section is sleeved around an outer circumference of the first cylindrical section and a cylindrical space is defined therebetween, and the tapered space and the cylindrical space communicate with each other and form the molding space.
Optionally, the mold core further comprises a plugging section, wherein the plugging section is connected with an end of the first tapered section that is remote from the first cylindrical section, and the mold core through hole sequentially penetrates the plugging section, the first tapered section, and the first cylindrical section; and the plugging section is inserted into the ventilation hole.
Optionally, the molding device further comprises a gas filling base mounted to the head, wherein the gas filling base is provided with a gas filling inlet and a gas delivery hole, and the gas delivery hole communicates with the gas filling inlet and the ventilation hole, respectively.
Optionally, the gas filling inlet is provided in a side wall of the gas filling base, and the gas delivery hole penetrates the gas filling base in a length direction of the gas filling base.
Optionally, an annular sealing protrusion is provided on an outer circumferential surface of the gas filling base, the gas filling base has an insertion portion, and the insertion portion is inserted into the ventilation hole and the annular sealing projection abuts against an outer wall of the head.
Optionally, the device for molding a loose tube for a totally gel-free fiber optic cable further comprises a pressure ring, wherein the pressure ring is sleeved outside the gas filling base, the pressure ring is connected with the head, and the annular sealing protrusion is clamped between the pressure ring and the head.
Optionally, the device for molding a loose tube for a totally gel-free fiber optic cable further comprises a sealing gasket, wherein the sealing gasket is located
Optionally, the mold core comprises a first tapered section and a first cylindrical section, wherein the first cylindrical section is connected with an end of the first tapered section having a smaller inner diameter; the mold sleeve comprises a second tapered section and a second cylindrical section, wherein the second cylindrical section is connected with an end of the second tapered section having a smaller inner diameter; and the second tapered section is sleeved around an outer circumference of the first tapered section and a tapered space is defined therebetween, the second cylindrical section is sleeved around an outer circumference of the first cylindrical section and a cylindrical space is defined therebetween, and the tapered space and the cylindrical space communicate with each other and form the molding space.
Optionally, the mold core further comprises a plugging section, wherein the plugging section is connected with an end of the first tapered section that is remote from the first cylindrical section, and the mold core through hole sequentially penetrates the plugging section, the first tapered section, and the first cylindrical section; and the plugging section is inserted into the ventilation hole.
Optionally, the molding device further comprises a gas filling base mounted to the head, wherein the gas filling base is provided with a gas filling inlet and a gas delivery hole, and the gas delivery hole communicates with the gas filling inlet and the ventilation hole, respectively.
Optionally, the gas filling inlet is provided in a side wall of the gas filling base, and the gas delivery hole penetrates the gas filling base in a length direction of the gas filling base.
Optionally, an annular sealing protrusion is provided on an outer circumferential surface of the gas filling base, the gas filling base has an insertion portion, and the insertion portion is inserted into the ventilation hole and the annular sealing projection abuts against an outer wall of the head.
Optionally, the device for molding a loose tube for a totally gel-free fiber optic cable further comprises a pressure ring, wherein the pressure ring is sleeved outside the gas filling base, the pressure ring is connected with the head, and the annular sealing protrusion is clamped between the pressure ring and the head.
Optionally, the device for molding a loose tube for a totally gel-free fiber optic cable further comprises a sealing gasket, wherein the sealing gasket is located
3 between the gas filling base and the head and is configured to seal a connection position between the gas filling base and the head.
Optionally, a pressure relief valve is mounted to the gas filling base, and the pressure relief valve communicates with the gas delivery hole.
Optionally, the molding device further comprises an optical fiber guiding mechanism, wherein the optical fiber guiding mechanism is connected with the head, and an interior of the optical fiber guiding mechanism communicates with the mold core through hole.
Optionally, the optical fiber guiding mechanism comprises a syringe holder and a guiding component, wherein the syringe holder is mounted to the head, and the syringe holder is provided with a guiding through hole communicating with the mold core through hole; and the guiding component is mounted in the guiding through hole.
Optionally, the syringe holder is located in the gas delivery hole, a gap is provided between an outer wall of the syringe holder and an inner wall of the gas delivery hole, and one end of the syringe holder is inserted into the mold core through hole, and a gap is provided between the syringe holder and an inner wall of the mold core through hole so that the gas delivery hole, the ventilation hole, and the mold core through hole communicate with one another sequentially.
Optionally, the syringe holder comprises a connecting portion and a guiding portion connected with each other, the guiding through hole sequentially penetrates the connecting portion and the guiding portion, the guiding portion passes through the gas delivery hole and is inserted into the mold core through hole, and the connecting portion is connected with the gas filling base.
Optionally, the guiding component comprises a first optical fiber guiding syringe and a second optical fiber guiding syringe, wherein the first optical fiber guiding syringe is mounted to a first end of the syringe holder, and the second optical fiber guiding syringe is mounted to a second end of the syringe holder;
and the first optical fiber guiding syringe is provided with a first optical fiber guiding hole, the second optical fiber guiding syringe is provided with a second optical fiber guiding hole, and both the first optical fiber guiding hole and the second optical fiber guiding hole communicate with the guiding through hole.
Compared with the prior art, the embodiments of the present disclosure bring, for example, the following advantageous effects:
The present disclosure provides a process for producing a loose tube for a totally gel-free fiber optic cable and a device for molding the same. The process for producing a loose tube for a totally gel-free fiber optic cable comprises:
extruding a loose tube material into a loose tube of a tubular shape by using a
Optionally, a pressure relief valve is mounted to the gas filling base, and the pressure relief valve communicates with the gas delivery hole.
Optionally, the molding device further comprises an optical fiber guiding mechanism, wherein the optical fiber guiding mechanism is connected with the head, and an interior of the optical fiber guiding mechanism communicates with the mold core through hole.
Optionally, the optical fiber guiding mechanism comprises a syringe holder and a guiding component, wherein the syringe holder is mounted to the head, and the syringe holder is provided with a guiding through hole communicating with the mold core through hole; and the guiding component is mounted in the guiding through hole.
Optionally, the syringe holder is located in the gas delivery hole, a gap is provided between an outer wall of the syringe holder and an inner wall of the gas delivery hole, and one end of the syringe holder is inserted into the mold core through hole, and a gap is provided between the syringe holder and an inner wall of the mold core through hole so that the gas delivery hole, the ventilation hole, and the mold core through hole communicate with one another sequentially.
Optionally, the syringe holder comprises a connecting portion and a guiding portion connected with each other, the guiding through hole sequentially penetrates the connecting portion and the guiding portion, the guiding portion passes through the gas delivery hole and is inserted into the mold core through hole, and the connecting portion is connected with the gas filling base.
Optionally, the guiding component comprises a first optical fiber guiding syringe and a second optical fiber guiding syringe, wherein the first optical fiber guiding syringe is mounted to a first end of the syringe holder, and the second optical fiber guiding syringe is mounted to a second end of the syringe holder;
and the first optical fiber guiding syringe is provided with a first optical fiber guiding hole, the second optical fiber guiding syringe is provided with a second optical fiber guiding hole, and both the first optical fiber guiding hole and the second optical fiber guiding hole communicate with the guiding through hole.
Compared with the prior art, the embodiments of the present disclosure bring, for example, the following advantageous effects:
The present disclosure provides a process for producing a loose tube for a totally gel-free fiber optic cable and a device for molding the same. The process for producing a loose tube for a totally gel-free fiber optic cable comprises:
extruding a loose tube material into a loose tube of a tubular shape by using a
4 loose tube molding device; filling a compressed gas into the loose tube;
cooling the loose tube; threading an optical fiber or an optical fiber ribbon into the loose tube. The interior of the loose tube is supported by the compressed gas, so that the outer diameter of the loose tube is not affected by a fluctuation of the gas pressure, the loose tube has a rounded and smooth outer diameter, and it can be ensured that an appropriate excess length of an optical fiber is formed in the loose tube, so that the optical fiber has satisfactory transmission performance, and the optical fiber has a stable excess length and a good attenuation index.
Brief Description of Drawings In order to more clearly illustrate technical solutions of specific embodiments of the present disclosure or in the related art, drawings required for use in the description of the specific embodiments or the related art will be described briefly below. It is apparent that the drawings below are merely illustrative of some embodiments of the present disclosure. It will be understood by those of ordinary skill in the art that other drawings can also be obtained based on these drawings without any inventive effort.
FIG. 1 is a sectional view of a device for molding a loose tube for a totally gel-free fiber optic cable according to the present disclosure; and FIG. 2 is a partially enlarged schematic view of FIG. 1.
Reference Numerals: 100-head; 001-ventilation hole; 200-mold core; 201-mold core through hole; 210-plugging section; 220-first tapered section; 230-first cylindrical section; 300-mold sleeve; 310-second tapered section; 320-second cylindrical section; 400-gas filling base; 410-gas filling inlet; 411-gas delivery hole; 420-pressure relief valve; 430-positioning pin; 440-sealing gasket;
450-annular sealing protrusion; 460-insertion portion; 470-deflation hole; 500-optical fiber guiding mechanism; 510-syringe holder; 511-bolt; 512-guiding through hole; 513-connecting portion; 514-guiding portion; 502-guiding component; 520-first optical fiber guiding syringe; 530-second optical fiber guiding syringe; 600-molding space; 610-tapered space; 620-cylindrical space;
630-outlet end; 700-pressure ring.
Detailed Description of Embodiments In order to make the objects, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the present disclosure will be described below clearly and completely with reference to the accompanying drawings. It is apparent that the embodiments to be described are some, but not all of the embodiments of the present disclosure. Generally, the components of the embodiments of the present disclosure, as described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
cooling the loose tube; threading an optical fiber or an optical fiber ribbon into the loose tube. The interior of the loose tube is supported by the compressed gas, so that the outer diameter of the loose tube is not affected by a fluctuation of the gas pressure, the loose tube has a rounded and smooth outer diameter, and it can be ensured that an appropriate excess length of an optical fiber is formed in the loose tube, so that the optical fiber has satisfactory transmission performance, and the optical fiber has a stable excess length and a good attenuation index.
Brief Description of Drawings In order to more clearly illustrate technical solutions of specific embodiments of the present disclosure or in the related art, drawings required for use in the description of the specific embodiments or the related art will be described briefly below. It is apparent that the drawings below are merely illustrative of some embodiments of the present disclosure. It will be understood by those of ordinary skill in the art that other drawings can also be obtained based on these drawings without any inventive effort.
FIG. 1 is a sectional view of a device for molding a loose tube for a totally gel-free fiber optic cable according to the present disclosure; and FIG. 2 is a partially enlarged schematic view of FIG. 1.
Reference Numerals: 100-head; 001-ventilation hole; 200-mold core; 201-mold core through hole; 210-plugging section; 220-first tapered section; 230-first cylindrical section; 300-mold sleeve; 310-second tapered section; 320-second cylindrical section; 400-gas filling base; 410-gas filling inlet; 411-gas delivery hole; 420-pressure relief valve; 430-positioning pin; 440-sealing gasket;
450-annular sealing protrusion; 460-insertion portion; 470-deflation hole; 500-optical fiber guiding mechanism; 510-syringe holder; 511-bolt; 512-guiding through hole; 513-connecting portion; 514-guiding portion; 502-guiding component; 520-first optical fiber guiding syringe; 530-second optical fiber guiding syringe; 600-molding space; 610-tapered space; 620-cylindrical space;
630-outlet end; 700-pressure ring.
Detailed Description of Embodiments In order to make the objects, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the present disclosure will be described below clearly and completely with reference to the accompanying drawings. It is apparent that the embodiments to be described are some, but not all of the embodiments of the present disclosure. Generally, the components of the embodiments of the present disclosure, as described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
5 Thus, the following detailed description of the embodiments of the present disclosure, as represented in the figures, is not intended to limit the scope of the present disclosure as claimed, but is merely representative of selected embodiments of the present disclosure. All the other embodiments obtained by those of ordinary skill in the art in light of the embodiments of the present disclosure without inventive efforts shall fall within the scope of the present disclosure as claimed.
It should be noted that similar reference numerals and letters refer to similar items in the following figures, and thus once an item is defined in one figure, it may not need be further defined or explained in the subsequent figures.
Throughout the description of the present disclosure, it should be noted that orientation or positional relations indicated by the terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", and "outside", if present, are based on the orientation or positional relations shown in the figures, or the orientation or positional relations in which the inventive product is conventionally placed in use, and these terms are intended only to facilitate the description of the present disclosure and simplify the description, but not intended to indicate or imply that the referred devices or elements must be in a particular orientation or constructed or operated in the particular orientation, and therefore should not be construed as limiting the present disclosure.
In addition, the terms such as "first", "second", and "third", if present, are used for distinguishing the description only, and should not be understood as an indication or implication of relative importance.
In addition, the terms "horizontal", "vertical", "overhanging", or the like, if present, does not mean that a component is required to be absolutely horizontal or overhanging, but means that the component may be slightly inclined. For example, the term "horizontal" simply means that the component's direction is more horizontal than that indicated by the term "vertical", and it does not mean that the structure must be completely horizontal, but it means that the structure may be slightly inclined.
In the description of the present disclosure, it should also be noted that the terms "disposed", "mounted", "coupled", and "connected", if present, should be understood broadly unless otherwise expressly specified or defined. For example, a connection may be fixed connection or detachable connection or integral connection, may be mechanical connection or electrical connection, or may be direct coupling or indirect coupling via an intermediate medium or internal communication between two elements. The specific meanings of the above-mentioned terms in the present disclosure can be understood by those of ordinary skill in the art according to specific situations.
It should be noted that the features in the embodiments of the present disclosure may be combined with each other without conflict.
It should be noted that similar reference numerals and letters refer to similar items in the following figures, and thus once an item is defined in one figure, it may not need be further defined or explained in the subsequent figures.
Throughout the description of the present disclosure, it should be noted that orientation or positional relations indicated by the terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", and "outside", if present, are based on the orientation or positional relations shown in the figures, or the orientation or positional relations in which the inventive product is conventionally placed in use, and these terms are intended only to facilitate the description of the present disclosure and simplify the description, but not intended to indicate or imply that the referred devices or elements must be in a particular orientation or constructed or operated in the particular orientation, and therefore should not be construed as limiting the present disclosure.
In addition, the terms such as "first", "second", and "third", if present, are used for distinguishing the description only, and should not be understood as an indication or implication of relative importance.
In addition, the terms "horizontal", "vertical", "overhanging", or the like, if present, does not mean that a component is required to be absolutely horizontal or overhanging, but means that the component may be slightly inclined. For example, the term "horizontal" simply means that the component's direction is more horizontal than that indicated by the term "vertical", and it does not mean that the structure must be completely horizontal, but it means that the structure may be slightly inclined.
In the description of the present disclosure, it should also be noted that the terms "disposed", "mounted", "coupled", and "connected", if present, should be understood broadly unless otherwise expressly specified or defined. For example, a connection may be fixed connection or detachable connection or integral connection, may be mechanical connection or electrical connection, or may be direct coupling or indirect coupling via an intermediate medium or internal communication between two elements. The specific meanings of the above-mentioned terms in the present disclosure can be understood by those of ordinary skill in the art according to specific situations.
It should be noted that the features in the embodiments of the present disclosure may be combined with each other without conflict.
6 A process for producing a loose tube for a totally gel-free fiber optic cable according to the present disclosure comprises the following steps of:
extruding a loose tube material into a loose tube of a tubular shape by using a loose tube molding device;
filling a compressed gas into the loose tube during the molding of the loose tube;
cooling the loose tube;
threading an optical fiber or an optical fiber ribbon into a tube cavity of the cooled loose tube.
Optionally, the process step of filling the compressed gas into the loose tube comprises:
purifying and dehumidifying the compressed gas, and then filling the dehumidified compressed gas into the loose tube through a gas storage tank and a flow controller. In other words, the compressed gas is purified and dehumidified and then stored in a gas storage tank, and then the compressed gas in the gas storage tank is filled into the tube cavity of the loose tube through a pipeline, a flow controller is disposed on a delivery pipeline between the gas storage tank and the loose tube, and the flow controller is configured to control a flow rate of the compressed gas in the pipeline. Optionally, the flow controller includes a flow valve mounted on the delivery pipeline between the gas storage tank and the loose tube.
Optionally, the process step of cooling the loose tube comprises:
winding the loose tube around a primary pulling roller after the loose tube passes through a first cooling groove (or cooling tank);
pass the loose tube through a second cooling groove and an auxiliary pulling roller; in other words, the loose tube cooled by the first cooling groove is wound around the primary pulling roller, and then the loose tube is unwound from the primary pulling roller and then introduced into the second cooling groove and is subjected to a secondary cooling by the second cooling groove, and the loose tube after the secondary cooling is wound around the auxiliary pulling roller;
and introducing the loose tube into a take-up device and taking up the loose tube on a take-up reel. In this step, the loose tube after being subjected to the secondary cooling and wound around the auxiliary pulling roller is introduced into a take-up device (or wire taking-up device) and taken up on a take-up reel (or wire taking-up reel) of the take-up device.
The present disclosure further provides a device for molding a loose tube for a totally gel-free fiber optic cable to alleviate the technical problem in the related art that the loose tube tends to have a flat shape when being molded by
extruding a loose tube material into a loose tube of a tubular shape by using a loose tube molding device;
filling a compressed gas into the loose tube during the molding of the loose tube;
cooling the loose tube;
threading an optical fiber or an optical fiber ribbon into a tube cavity of the cooled loose tube.
Optionally, the process step of filling the compressed gas into the loose tube comprises:
purifying and dehumidifying the compressed gas, and then filling the dehumidified compressed gas into the loose tube through a gas storage tank and a flow controller. In other words, the compressed gas is purified and dehumidified and then stored in a gas storage tank, and then the compressed gas in the gas storage tank is filled into the tube cavity of the loose tube through a pipeline, a flow controller is disposed on a delivery pipeline between the gas storage tank and the loose tube, and the flow controller is configured to control a flow rate of the compressed gas in the pipeline. Optionally, the flow controller includes a flow valve mounted on the delivery pipeline between the gas storage tank and the loose tube.
Optionally, the process step of cooling the loose tube comprises:
winding the loose tube around a primary pulling roller after the loose tube passes through a first cooling groove (or cooling tank);
pass the loose tube through a second cooling groove and an auxiliary pulling roller; in other words, the loose tube cooled by the first cooling groove is wound around the primary pulling roller, and then the loose tube is unwound from the primary pulling roller and then introduced into the second cooling groove and is subjected to a secondary cooling by the second cooling groove, and the loose tube after the secondary cooling is wound around the auxiliary pulling roller;
and introducing the loose tube into a take-up device and taking up the loose tube on a take-up reel. In this step, the loose tube after being subjected to the secondary cooling and wound around the auxiliary pulling roller is introduced into a take-up device (or wire taking-up device) and taken up on a take-up reel (or wire taking-up reel) of the take-up device.
The present disclosure further provides a device for molding a loose tube for a totally gel-free fiber optic cable to alleviate the technical problem in the related art that the loose tube tends to have a flat shape when being molded by
7 extrusion, and the optical fiber is prone to adhere to the loose tube, which causes an unsatisfactory attenuation index of the optical fiber.
As shown in FIG. 1, the device for molding a loose tube for a totally gel-free fiber optic cable according to the present disclosure comprises: a head 100, a mold core 200, and a mold sleeve 300, wherein the head 100 is provided with a ventilation hole 001, the mold core 200 is connected with the head 100, one end of the mold core 200 is inserted into the ventilation hole 001 of the head 100, and the other end of the mold core 200 protrudes from the head 100; the mold core 200 is provided with a mold core through hole 201, and the mold core to through hole 201 communicates with the ventilation hole 001; the mold sleeve 300 is sleeved around an outer circumference of a portion of the mold core 200 that protrudes from the head 100, a molding space 600 is formed between an inner wall of the mold sleeve 300 and an outer wall of the mold core 200, and the molding space 600 communicates with the outside. Optionally, the cross section of the inner wall of the mold sleeve 300 has an annular shape, and correspondingly, the cross section of the outer wall of the mold core 200 has an annular shape, and a molding space 600 which has an annular cross section and is in communication with the outside is formed between the inner wall of the mold sleeve 300 and the outer wall of the mold core 200.
Optionally, the head 100 is provided with the ventilation hole 001 penetrating the head 100 in its length direction, and the mold core 200 is mounted to one end of the ventilation hole 001. The mold core 200 is provided with a mold core through hole 201 penetrating the mold core 200 in its length direction, and the mold core through hole 201 communicates with the ventilation hole 001 and is coaxial with the ventilation hole 001. A first end of the mold core 200 is located inside the ventilation hole 001, and a second end of the mold core 200 is located outside the ventilation hole 001. In other words, the mold core 200 has its first end inserted into the ventilation hole 001, and its second end exposed outside the ventilation hole 001. The mold sleeve 300 is sleeved around the second end of the mold core 200, the mold sleeve 300 has a molding through hole penetrating the mold sleeve 300 in its length direction, and an inner wall of the molding through hole is provided to be spaced apart from the outer wall of the mold core 200 to form the molding space 600.
During the production, a loose tube material extruded from a plastic extruder is introduced into the molding space 600 from a side of the molding space 600.
Since the head 100, the mold core 200, and the mold sleeve 300 are all kept fixed to one another, in other words, the molding space 600 is kept in a relatively fixed shape and size. Under the action of pressing forces from the head 100, the mold core 200, the mold sleeve 300 and the loose tube material delivered from the outside, the loose tube material is extruded as a loose tube of a tubular shape and the loose tube molded by extrusion is extruded out of the molding space 600 from the right end of as shown in FIG. 1, that is to say, the molded loose tube is extruded from an outlet end 630 of the molding space 600. The
As shown in FIG. 1, the device for molding a loose tube for a totally gel-free fiber optic cable according to the present disclosure comprises: a head 100, a mold core 200, and a mold sleeve 300, wherein the head 100 is provided with a ventilation hole 001, the mold core 200 is connected with the head 100, one end of the mold core 200 is inserted into the ventilation hole 001 of the head 100, and the other end of the mold core 200 protrudes from the head 100; the mold core 200 is provided with a mold core through hole 201, and the mold core to through hole 201 communicates with the ventilation hole 001; the mold sleeve 300 is sleeved around an outer circumference of a portion of the mold core 200 that protrudes from the head 100, a molding space 600 is formed between an inner wall of the mold sleeve 300 and an outer wall of the mold core 200, and the molding space 600 communicates with the outside. Optionally, the cross section of the inner wall of the mold sleeve 300 has an annular shape, and correspondingly, the cross section of the outer wall of the mold core 200 has an annular shape, and a molding space 600 which has an annular cross section and is in communication with the outside is formed between the inner wall of the mold sleeve 300 and the outer wall of the mold core 200.
Optionally, the head 100 is provided with the ventilation hole 001 penetrating the head 100 in its length direction, and the mold core 200 is mounted to one end of the ventilation hole 001. The mold core 200 is provided with a mold core through hole 201 penetrating the mold core 200 in its length direction, and the mold core through hole 201 communicates with the ventilation hole 001 and is coaxial with the ventilation hole 001. A first end of the mold core 200 is located inside the ventilation hole 001, and a second end of the mold core 200 is located outside the ventilation hole 001. In other words, the mold core 200 has its first end inserted into the ventilation hole 001, and its second end exposed outside the ventilation hole 001. The mold sleeve 300 is sleeved around the second end of the mold core 200, the mold sleeve 300 has a molding through hole penetrating the mold sleeve 300 in its length direction, and an inner wall of the molding through hole is provided to be spaced apart from the outer wall of the mold core 200 to form the molding space 600.
During the production, a loose tube material extruded from a plastic extruder is introduced into the molding space 600 from a side of the molding space 600.
Since the head 100, the mold core 200, and the mold sleeve 300 are all kept fixed to one another, in other words, the molding space 600 is kept in a relatively fixed shape and size. Under the action of pressing forces from the head 100, the mold core 200, the mold sleeve 300 and the loose tube material delivered from the outside, the loose tube material is extruded as a loose tube of a tubular shape and the loose tube molded by extrusion is extruded out of the molding space 600 from the right end of as shown in FIG. 1, that is to say, the molded loose tube is extruded from an outlet end 630 of the molding space 600. The
8 extruded-out loose tube facilitates subsequent process operations. During the = molding, the tube cavity of the loose tube communicates with the mold core through hole 201. After a compressed gas is fed into the ventilation hole 001, the compressed gas is introduced into the tube cavity of the loose tube through the ventilation hole 001 and the mold core through hole 201 to support the loose tube so that the loose tube has a rounded and smooth outer diameter, and the quality of molding of the loose tube is improved.
Optionally, the mold core 200 comprises a plugging section 210, a first tapered section 220, and a first cylindrical section 230 which are sequentially connected. In other words, the mold core 200 comprises a plugging section 210, a first tapered section 220, and a first cylindrical section 230, wherein the plugging section 210 is connected with one end of the first tapered section 220, the other end of the first tapered section 220 is connected with the first cylindrical section 230, and the mold core through hole 201 sequentially penetrates the plugging section 210, the first tapered section 220, and the first cylindrical section 230. It should be noted that the two ends of the first tapered section 220 have unequal inner diameters, the first cylindrical section 230 is connected with an end of the first tapered section 220 having a smaller inner diameter, and correspondingly, the plugging section 210 is connected with an end of the first tapered section 220 having a larger inner diameter.
Optionally, the inner diameter of the first cylindrical section 230 is equal to the smallest inner diameter of the first tapered section 220.
Optionally, the plugging section 210, the first tapered section 220, and the first cylindrical section 230 are structurally molded integrally, wherein the first tapered section 220 is corresponding to a central position of the molding space 600, and an end of the first cylindrical section 230 that is remote from the first tapered section 220 is at the outlet end 630 of the molding space 600, that is to say, the mold core through hole penetrating the first cylindrical section 230 communicates with the molding space 600, so that the compressed gas discharged from the mold core through hole can be introduced into the loose tube which is already extruded and molded by the molding space 600.
Optionally, the plugging section 210, the first cylindrical section 230, and the first tapered section 220 are coaxial. During installation, the plugging section 210 is inserted into the ventilation hole 001 of the head 100, and the first tapered section 220 and the first cylindrical section 230 are exposed from the ventilation hole 001.
Optionally, the mold sleeve 300 comprises a second tapered section 310 and a second cylindrical section 320 connected with each other. It should be noted that the second cylindrical section 320 is connected with an end of the second tapered section 310 having a smaller inner diameter. Optionally, the inner diameter of the second cylindrical section 320 is equal to the smallest inner diameter of the second tapered section 310. Optionally, the second tapered
Optionally, the mold core 200 comprises a plugging section 210, a first tapered section 220, and a first cylindrical section 230 which are sequentially connected. In other words, the mold core 200 comprises a plugging section 210, a first tapered section 220, and a first cylindrical section 230, wherein the plugging section 210 is connected with one end of the first tapered section 220, the other end of the first tapered section 220 is connected with the first cylindrical section 230, and the mold core through hole 201 sequentially penetrates the plugging section 210, the first tapered section 220, and the first cylindrical section 230. It should be noted that the two ends of the first tapered section 220 have unequal inner diameters, the first cylindrical section 230 is connected with an end of the first tapered section 220 having a smaller inner diameter, and correspondingly, the plugging section 210 is connected with an end of the first tapered section 220 having a larger inner diameter.
Optionally, the inner diameter of the first cylindrical section 230 is equal to the smallest inner diameter of the first tapered section 220.
Optionally, the plugging section 210, the first tapered section 220, and the first cylindrical section 230 are structurally molded integrally, wherein the first tapered section 220 is corresponding to a central position of the molding space 600, and an end of the first cylindrical section 230 that is remote from the first tapered section 220 is at the outlet end 630 of the molding space 600, that is to say, the mold core through hole penetrating the first cylindrical section 230 communicates with the molding space 600, so that the compressed gas discharged from the mold core through hole can be introduced into the loose tube which is already extruded and molded by the molding space 600.
Optionally, the plugging section 210, the first cylindrical section 230, and the first tapered section 220 are coaxial. During installation, the plugging section 210 is inserted into the ventilation hole 001 of the head 100, and the first tapered section 220 and the first cylindrical section 230 are exposed from the ventilation hole 001.
Optionally, the mold sleeve 300 comprises a second tapered section 310 and a second cylindrical section 320 connected with each other. It should be noted that the second cylindrical section 320 is connected with an end of the second tapered section 310 having a smaller inner diameter. Optionally, the inner diameter of the second cylindrical section 320 is equal to the smallest inner diameter of the second tapered section 310. Optionally, the second tapered
9 section 310 and the second cylindrical section 320 are structurally molded integrally.
During installation, the plugging section 210 is inserted into the ventilation hole 001 of the head 100, the second tapered section 310 is sleeved around an outer circumference of the first tapered section 220, and the second cylindrical section 320 is sleeved around an outer circumference of the first cylindrical section 230. Moreover, a spacing is provided between the first tapered section 220 and the second tapered section 310, a spacing is provided between the second cylindrical section 320 and the first cylindrical section 230, and the space between the first tapered section 220 and the second tapered section 310 is in communication with the space between the first cylindrical section and the second cylindrical section 320, so as to form the molding space 600.
Referring to FIG. 2, optionally, the second tapered section 310 is disposed opposite to the first tapered section 220, and a spacing is provided between an is inner peripheral wall of the second tapered section 310 and an outer peripheral wall of the first tapered section 220 to form a tapered space 610 having an annular cross section. A tapered angle of the second tapered section 310 is equal to a tapered angle of the first tapered section 220. The second cylindrical section 320 is sleeved around the outer circumference of the first cylindrical section 230 and disposed coaxially with the first cylindrical section 230, a spacing is provided between an inner peripheral wall of the second cylindrical section 320 and an outer peripheral wall of the first cylindrical section 230 to form a cylindrical space 620, and the tapered space 610 and the cylindrical space 620 communicate with each other and form the molding space 600.
During the production, the loose tube material is introduced into the molding space 600. In other words, the loose tube material is first introduced into the tapered space 610 of the molding space 600, and then the loose tube material is moved rightward when viewed from FIG. 1 and is introduced into the cylindrical space 620 under the action of the external pressing force, and finally, the loose tube material is moved from the right end of the molding space 600, that is to say, the loose tube material is moved toward the outlet end 630 of the molding space 600 and is moved out of the outlet end 630. The loose tube material is wrapped around the mold core 200 during its movement from left to right, and a loose tube of a tubular shape is formed under the cooperation of the mold core 200 and the mold sleeve 300 and is moved out of the right end of the molding space 600. Since the mold core 200 comprises a first tapered section 220 and the mold sleeve 300 comprises a second tapered section 310, when the loose tube material between the first tapered section 220 and the second tapered section 310 is moving toward the outlet end 630 of the molding space 600 during extrusion, the first tapered section 220 and the second tapered section 310 serve a guiding function, which facilitates the flow of the loose tube material from the tapered space 610 to the cylindrical space 620, and hence facilitates the molding of the loose tube.
11) Optionally, the molding device further comprises a gas filling base 400 mounted to the head 100, wherein the gas filling base 400 is provided with a gas filling inlet 410 and a gas delivery hole 411, and the gas delivery hole communicates with the gas filling inlet 410 and the ventilation hole 001, respectively.
As shown in FIG. 1, the gas filling base 400 is mounted to the left end of the head 100 by a positioning pin 430. Obviously, the gas filling base 400 may also be welded to the left end of the head 100, or the gas filling base 400 may be fixed to the left end of the head 100 by bolts. Optionally, a first end of the gas filling base 400 is located in the ventilation hole 001, and a second end of the gas filling base 400 is located outside the ventilation hole 001; a sealing gasket 440 is disposed between the gas filling base 400 and the head 100 to improve the airtightness of the connection position between the gas filling base 400 and the head 100 to reduce a risk of leakage of the compressed gas. The gas filling inlet 410 is provided in a peripheral wall of the second end portion of the gas filling base 400 and communicates with the gas delivery hole 411, and the gas delivery hole 411 is coaxial with the ventilation hole 001.
Optionally, the gas filling base 400 has a cylindrical structure, an annular sealing protrusion 450 is provided on an outer peripheral wall of the gas filling base 400, the gas delivery hole 411 penetrating the gas filling base 400 is provided in the gas filling base 400 in its length direction, the annular sealing protrusion 450 protrudes outward from the outer peripheral wall of the gas filling base 400 in a radial direction of the gas delivery hole 411, and the gas filling base 400 and the annular sealing protrusion 450 may be integrally molded. The gas filling inlet 410 is provided in the peripheral wall of the gas filling base 400, and the gas filling inlet 410 communicates with the gas delivery hole 411. The gas filling base 400 has an insertion portion 460 configured to be inserted into the ventilation hole 001. After the insertion portion 460 is inserted into the ventilation hole 001, the gas delivery hole 411 communicates with the ventilation hole 001. An end of the gas delivery hole 411 that is remote from the head 100 is closed, an end surface of the annular sealing protrusion 450 that is close to the head 100 is corresponding to an outer side surface of the head 100, and a sealing gasket 440 is disposed between the annular sealing protrusion 450 and the head 100, and the sealing gasket 440 is pressed and deformed to realize sealing at the connection position between the annular sealing protrusion 450 and the head 100. The gas filling inlet 410 and the insertion portion 460 are respectively located on both sides of the annular sealing protrusion 450.
Optionally, the molding device further comprises a pressure ring 700, wherein the pressure ring 700 is sleeved outside the gas filling base 400 and abuts against a side surface of the annular sealing protrusion 450 that is remote from the insertion portion 460, and the pressure ring 700 is fixedly connected with the head 100. The gas filling base is fixedly connected to the head 100 in an indirect manner by connecting the pressure ring 700 with the head 100, and the annular sealing protrusion 450 and the sealing gasket are not provided with hole structures, thus the connection position between the annular sealing protrusion 450 and the head 100 has a good sealing performance after the annular sealing protrusion and the head are connected with the head 100. It should be noted that the pressure ring 700 may be fixedly connected with the head 100 by positioning pins, or the pressure ring 700 may be welded to the head 100, or the pressure ring 700 may be fixedly connected with the head 100 by bolts.
The compressed gas is introduced into the gas delivery hole 411 of the gas filling base 400 through the gas filling inlet 410, and is introduced into the loose tube sequentially through the gas delivery hole 411, the ventilation hole 001, and the mold core through hole 201 to support an inner tube wall of the loose tube, so that an outer tube wall of the loose tube is kept round and smooth.
Optionally, a pressure relief valve 420 is mounted to the gas filling base 400, wherein the pressure relief valve 420 is located at a side of the gas filling base 400, and the pressure relief valve 420 communicates with the gas delivery hole 411.
Optionally, a deflation hole (or gas release hole) 470 is provided in a side wall of the gas filling base 400, wherein the deflation hole 470 communicates with the gas delivery hole 411, and the pressure relief valve 420 is mounted in the deflation hole 470. During the operation, when the compressed gas is filled into the loose tube, and when the gas pressure in the loose tube is greater than a set value, excess gas in the gas filling base 400 is automatically discharged through the pressure relief valve 420 to achieve relief of pressure from the interior of the gas filling base 400, so that the gas pressure in the loose tube is kept constant, and the quality of molding of the loose tube is ensured.
Optionally, the molding device further comprises an optical fiber guiding mechanism 500, and an interior of the optical fiber guiding mechanism 500 communicates with the mold core through hole 201.
An optical fiber bundle or an optical fiber ribbon stack and a water blocking yarn or a water blocking tape may be introduced into the mold core through hole 201 by the optical fiber guiding mechanism. Since the mold core through hole 201 communicates with the interior of the loose tube, the optical fiber bundle or the optical fiber ribbon stack and the water blocking yarn or the water blocking tape may be introduced into the loose tube through the mold core through hole 201.
Optionally, the optical fiber guiding mechanism 500 comprises a syringe holder 510 and a guiding component 502, wherein the syringe holder 510 is mounted to the head 100, the syringe holder 510 is provided with a guiding through hole 512, and the guiding through hole 512 is connected with the mold core through hole 201; and the guiding component 502 is mounted in the guiding through hole 512.
Optionally, the syringe holder 510 is mounted to the gas filling base 400. In other words, the syringe holder 510 is fixed to the head 100 via the gas filling base 400. During installation, the syringe holder 510 is inserted into the gas delivery hole 411 from the left end of the gas delivery hole 411, that is to say, the syringe holder 510 is inserted into the gas delivery hole 411 from an end of the gas filling base 400 remote from the head 100 to achieve blocking of an end of the gas delivery hole 411 that is remote from the head 100. The guiding through hole 512 penetrates the syringe holder 510 in a length direction of the syringe holder 510 and is coaxial with the gas delivery hole 411. The syringe holder 510 comprises a connecting portion 513 and a guiding portion 514 which are molded integrally, wherein the guiding portion 514 is located in the gas delivery hole 411 and has an outer diameter smaller than the diameter of the gas delivery hole 411, and an annular gap is provided between an outer peripheral wall of the guiding portion 514 and an inner wall of the gas filling base 400 forming the gas delivery hole 411 and the annular gap is configured to allow the compressed gas to pass therethrough. The connecting portion 513 is mounted to the left end of the gas filling base 400, and the diameter of the connecting portion 513 is larger than the diameter of the gas delivery hole to close the left end of the gas delivery hole 411. In other words, a stepped structure is formed at the connection position between the connecting portion 513 and the guiding portion 514, the guiding portion 514 can be inserted into the gas delivery hole 411, while the connecting portion 513 is blocked outside the gas delivery hole 411, and one end surface of the connecting portion 513 is sealingly fitted with an end surface of the gas filling base 400 that is remote from the head 100.
An optical fiber bundle or an optical fiber ribbon stack and a water blocking yarn or a water blocking tape may be introduced into the mold core through hole 201 by the guiding component 502. Since the mold core through hole 201 communicates with the interior of the loose tube, the optical fiber bundle or the optical fiber ribbon stack and the water blocking yarn or the water blocking tape may be introduced into the loose tube through the mold core through hole 201.
The guiding component 502 is mounted to the gas filling base 400 via the syringe holder 510 to facilitate installation and detachment of the guiding component 502.
Optionally, the guiding component 502 comprises a first optical fiber guiding syringe 520 and a second optical fiber guiding syringe 530, wherein the first optical fiber guiding syringe 520 is mounted to a first end of the syringe holder 510, and the second optical fiber guiding syringe 530 is mounted to a second end of the syringe holder 510. During actual installation, the first optical fiber guiding syringe 520 is inserted into one end of the guiding through hole 512 provided in the syringe holder 510, and the second optical fiber guiding syringe 530 is inserted into the other end of the guiding through hole 512 provided in the syringe holder 520.
Optionally, the first optical fiber guiding syringe 520 is provided with a first optical fiber guiding hole, the second optical fiber guiding syringe 530 is provided with a second optical fiber guiding hole, and both the first optical fiber guiding hole and the second optical fiber guiding hole communicate with the guiding through hole 512.
Both the axis of the first optical fiber guiding hole and the axis of the second optical fiber guiding hole coincide with the axis of the guiding through hole 512.
The syringe holder 510 is connected with the gas filling base 400 by a bolt 511.
Specifically, the syringe holder 510 is provided with a connecting through hole configured to allow the bolt 511 to pass therethrough, the gas filling base is provided with a threaded hole configured to be fitted with the bolt 511, and the bolt 511 passes through the connecting through hole and is fitted with the threaded hole to mount the syringe holder 510 to the gas filling base 400. It should be noted that the number of the bolts is set as needed. For example, a plurality of bolts may be provided, and the plurality of bolts are arranged at even intervals in the circumferential direction of the gas filling base 400 to improve the firmness of the connection between the syringe holder 510 and the gas filling base 400.
Optionally, the diameter of the connecting through hole is larger than the diameter of the bolt 511. A radial position of the syringe holder 510 relative to the gas filling base 400 is adjusted by adjusting the relative positions of the axis of the connecting through hole and the axis of the bolt 511, thereby adjusting the coaxiality of the first optical fiber guiding hole and the second optical fiber guiding hole with the gas delivery hole 411 so as to improve the guiding precision. After the adjustment is completed, the bolt passes through the connecting through hole and is screwed into the threaded hole provided in the gas filling base 400 to achieve the fixed connection of the syringe holder 510 to the gas filling base 400.
The present disclosure provides a process for producing a loose tube for a totally gel-free fiber optic cable and a device for molding the same. The process for producing a loose tube for a totally gel-free fiber optic cable comprises:
extruding a loose tube material into a loose tube of a tubular shape by using a loose tube molding device; filling a compressed gas into a tube cavity of the loose tube during the molding of the loose tube; cooling the loose tube;
threading an optical fiber or an optical fiber ribbon into the tube cavity of the cooled loose tube. In the production process according to the present disclosure, the compressed gas is continuously fed into the tube cavity of the loose tube during the extrusion and molding of the loose tube, and the interior of the loose tube is supported by the compressed gas, so that the outer diameter of the loose tube is not affected by a fluctuation of the gas pressure, the loose tube has a rounded and smooth outer diameter, and it can be ensured that an appropriate excess length of an optical fiber is formed in the loose tube, so that the optical fiber has satisfactory transmission performance, and the optical fiber has a stable excess length and a good attenuation index.
Finally, it should be noted that the above embodiments are merely intended to illustrate the technical solutions of the present disclosure, but not intended to limit the present disclosure. Although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that the technical solutions disclosed in the foregoing embodiments may still be modified, or some or all of the technical features thereof may be replaced with equivalents; and these modifications or replacements will not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present disclosure.
Industrial Applicability In summary, the present disclosure provides a process for producing a loose tube for a totally gel-free fiber optic cable and a device for molding the same, by which the loose tube is molded with high quality.
During installation, the plugging section 210 is inserted into the ventilation hole 001 of the head 100, the second tapered section 310 is sleeved around an outer circumference of the first tapered section 220, and the second cylindrical section 320 is sleeved around an outer circumference of the first cylindrical section 230. Moreover, a spacing is provided between the first tapered section 220 and the second tapered section 310, a spacing is provided between the second cylindrical section 320 and the first cylindrical section 230, and the space between the first tapered section 220 and the second tapered section 310 is in communication with the space between the first cylindrical section and the second cylindrical section 320, so as to form the molding space 600.
Referring to FIG. 2, optionally, the second tapered section 310 is disposed opposite to the first tapered section 220, and a spacing is provided between an is inner peripheral wall of the second tapered section 310 and an outer peripheral wall of the first tapered section 220 to form a tapered space 610 having an annular cross section. A tapered angle of the second tapered section 310 is equal to a tapered angle of the first tapered section 220. The second cylindrical section 320 is sleeved around the outer circumference of the first cylindrical section 230 and disposed coaxially with the first cylindrical section 230, a spacing is provided between an inner peripheral wall of the second cylindrical section 320 and an outer peripheral wall of the first cylindrical section 230 to form a cylindrical space 620, and the tapered space 610 and the cylindrical space 620 communicate with each other and form the molding space 600.
During the production, the loose tube material is introduced into the molding space 600. In other words, the loose tube material is first introduced into the tapered space 610 of the molding space 600, and then the loose tube material is moved rightward when viewed from FIG. 1 and is introduced into the cylindrical space 620 under the action of the external pressing force, and finally, the loose tube material is moved from the right end of the molding space 600, that is to say, the loose tube material is moved toward the outlet end 630 of the molding space 600 and is moved out of the outlet end 630. The loose tube material is wrapped around the mold core 200 during its movement from left to right, and a loose tube of a tubular shape is formed under the cooperation of the mold core 200 and the mold sleeve 300 and is moved out of the right end of the molding space 600. Since the mold core 200 comprises a first tapered section 220 and the mold sleeve 300 comprises a second tapered section 310, when the loose tube material between the first tapered section 220 and the second tapered section 310 is moving toward the outlet end 630 of the molding space 600 during extrusion, the first tapered section 220 and the second tapered section 310 serve a guiding function, which facilitates the flow of the loose tube material from the tapered space 610 to the cylindrical space 620, and hence facilitates the molding of the loose tube.
11) Optionally, the molding device further comprises a gas filling base 400 mounted to the head 100, wherein the gas filling base 400 is provided with a gas filling inlet 410 and a gas delivery hole 411, and the gas delivery hole communicates with the gas filling inlet 410 and the ventilation hole 001, respectively.
As shown in FIG. 1, the gas filling base 400 is mounted to the left end of the head 100 by a positioning pin 430. Obviously, the gas filling base 400 may also be welded to the left end of the head 100, or the gas filling base 400 may be fixed to the left end of the head 100 by bolts. Optionally, a first end of the gas filling base 400 is located in the ventilation hole 001, and a second end of the gas filling base 400 is located outside the ventilation hole 001; a sealing gasket 440 is disposed between the gas filling base 400 and the head 100 to improve the airtightness of the connection position between the gas filling base 400 and the head 100 to reduce a risk of leakage of the compressed gas. The gas filling inlet 410 is provided in a peripheral wall of the second end portion of the gas filling base 400 and communicates with the gas delivery hole 411, and the gas delivery hole 411 is coaxial with the ventilation hole 001.
Optionally, the gas filling base 400 has a cylindrical structure, an annular sealing protrusion 450 is provided on an outer peripheral wall of the gas filling base 400, the gas delivery hole 411 penetrating the gas filling base 400 is provided in the gas filling base 400 in its length direction, the annular sealing protrusion 450 protrudes outward from the outer peripheral wall of the gas filling base 400 in a radial direction of the gas delivery hole 411, and the gas filling base 400 and the annular sealing protrusion 450 may be integrally molded. The gas filling inlet 410 is provided in the peripheral wall of the gas filling base 400, and the gas filling inlet 410 communicates with the gas delivery hole 411. The gas filling base 400 has an insertion portion 460 configured to be inserted into the ventilation hole 001. After the insertion portion 460 is inserted into the ventilation hole 001, the gas delivery hole 411 communicates with the ventilation hole 001. An end of the gas delivery hole 411 that is remote from the head 100 is closed, an end surface of the annular sealing protrusion 450 that is close to the head 100 is corresponding to an outer side surface of the head 100, and a sealing gasket 440 is disposed between the annular sealing protrusion 450 and the head 100, and the sealing gasket 440 is pressed and deformed to realize sealing at the connection position between the annular sealing protrusion 450 and the head 100. The gas filling inlet 410 and the insertion portion 460 are respectively located on both sides of the annular sealing protrusion 450.
Optionally, the molding device further comprises a pressure ring 700, wherein the pressure ring 700 is sleeved outside the gas filling base 400 and abuts against a side surface of the annular sealing protrusion 450 that is remote from the insertion portion 460, and the pressure ring 700 is fixedly connected with the head 100. The gas filling base is fixedly connected to the head 100 in an indirect manner by connecting the pressure ring 700 with the head 100, and the annular sealing protrusion 450 and the sealing gasket are not provided with hole structures, thus the connection position between the annular sealing protrusion 450 and the head 100 has a good sealing performance after the annular sealing protrusion and the head are connected with the head 100. It should be noted that the pressure ring 700 may be fixedly connected with the head 100 by positioning pins, or the pressure ring 700 may be welded to the head 100, or the pressure ring 700 may be fixedly connected with the head 100 by bolts.
The compressed gas is introduced into the gas delivery hole 411 of the gas filling base 400 through the gas filling inlet 410, and is introduced into the loose tube sequentially through the gas delivery hole 411, the ventilation hole 001, and the mold core through hole 201 to support an inner tube wall of the loose tube, so that an outer tube wall of the loose tube is kept round and smooth.
Optionally, a pressure relief valve 420 is mounted to the gas filling base 400, wherein the pressure relief valve 420 is located at a side of the gas filling base 400, and the pressure relief valve 420 communicates with the gas delivery hole 411.
Optionally, a deflation hole (or gas release hole) 470 is provided in a side wall of the gas filling base 400, wherein the deflation hole 470 communicates with the gas delivery hole 411, and the pressure relief valve 420 is mounted in the deflation hole 470. During the operation, when the compressed gas is filled into the loose tube, and when the gas pressure in the loose tube is greater than a set value, excess gas in the gas filling base 400 is automatically discharged through the pressure relief valve 420 to achieve relief of pressure from the interior of the gas filling base 400, so that the gas pressure in the loose tube is kept constant, and the quality of molding of the loose tube is ensured.
Optionally, the molding device further comprises an optical fiber guiding mechanism 500, and an interior of the optical fiber guiding mechanism 500 communicates with the mold core through hole 201.
An optical fiber bundle or an optical fiber ribbon stack and a water blocking yarn or a water blocking tape may be introduced into the mold core through hole 201 by the optical fiber guiding mechanism. Since the mold core through hole 201 communicates with the interior of the loose tube, the optical fiber bundle or the optical fiber ribbon stack and the water blocking yarn or the water blocking tape may be introduced into the loose tube through the mold core through hole 201.
Optionally, the optical fiber guiding mechanism 500 comprises a syringe holder 510 and a guiding component 502, wherein the syringe holder 510 is mounted to the head 100, the syringe holder 510 is provided with a guiding through hole 512, and the guiding through hole 512 is connected with the mold core through hole 201; and the guiding component 502 is mounted in the guiding through hole 512.
Optionally, the syringe holder 510 is mounted to the gas filling base 400. In other words, the syringe holder 510 is fixed to the head 100 via the gas filling base 400. During installation, the syringe holder 510 is inserted into the gas delivery hole 411 from the left end of the gas delivery hole 411, that is to say, the syringe holder 510 is inserted into the gas delivery hole 411 from an end of the gas filling base 400 remote from the head 100 to achieve blocking of an end of the gas delivery hole 411 that is remote from the head 100. The guiding through hole 512 penetrates the syringe holder 510 in a length direction of the syringe holder 510 and is coaxial with the gas delivery hole 411. The syringe holder 510 comprises a connecting portion 513 and a guiding portion 514 which are molded integrally, wherein the guiding portion 514 is located in the gas delivery hole 411 and has an outer diameter smaller than the diameter of the gas delivery hole 411, and an annular gap is provided between an outer peripheral wall of the guiding portion 514 and an inner wall of the gas filling base 400 forming the gas delivery hole 411 and the annular gap is configured to allow the compressed gas to pass therethrough. The connecting portion 513 is mounted to the left end of the gas filling base 400, and the diameter of the connecting portion 513 is larger than the diameter of the gas delivery hole to close the left end of the gas delivery hole 411. In other words, a stepped structure is formed at the connection position between the connecting portion 513 and the guiding portion 514, the guiding portion 514 can be inserted into the gas delivery hole 411, while the connecting portion 513 is blocked outside the gas delivery hole 411, and one end surface of the connecting portion 513 is sealingly fitted with an end surface of the gas filling base 400 that is remote from the head 100.
An optical fiber bundle or an optical fiber ribbon stack and a water blocking yarn or a water blocking tape may be introduced into the mold core through hole 201 by the guiding component 502. Since the mold core through hole 201 communicates with the interior of the loose tube, the optical fiber bundle or the optical fiber ribbon stack and the water blocking yarn or the water blocking tape may be introduced into the loose tube through the mold core through hole 201.
The guiding component 502 is mounted to the gas filling base 400 via the syringe holder 510 to facilitate installation and detachment of the guiding component 502.
Optionally, the guiding component 502 comprises a first optical fiber guiding syringe 520 and a second optical fiber guiding syringe 530, wherein the first optical fiber guiding syringe 520 is mounted to a first end of the syringe holder 510, and the second optical fiber guiding syringe 530 is mounted to a second end of the syringe holder 510. During actual installation, the first optical fiber guiding syringe 520 is inserted into one end of the guiding through hole 512 provided in the syringe holder 510, and the second optical fiber guiding syringe 530 is inserted into the other end of the guiding through hole 512 provided in the syringe holder 520.
Optionally, the first optical fiber guiding syringe 520 is provided with a first optical fiber guiding hole, the second optical fiber guiding syringe 530 is provided with a second optical fiber guiding hole, and both the first optical fiber guiding hole and the second optical fiber guiding hole communicate with the guiding through hole 512.
Both the axis of the first optical fiber guiding hole and the axis of the second optical fiber guiding hole coincide with the axis of the guiding through hole 512.
The syringe holder 510 is connected with the gas filling base 400 by a bolt 511.
Specifically, the syringe holder 510 is provided with a connecting through hole configured to allow the bolt 511 to pass therethrough, the gas filling base is provided with a threaded hole configured to be fitted with the bolt 511, and the bolt 511 passes through the connecting through hole and is fitted with the threaded hole to mount the syringe holder 510 to the gas filling base 400. It should be noted that the number of the bolts is set as needed. For example, a plurality of bolts may be provided, and the plurality of bolts are arranged at even intervals in the circumferential direction of the gas filling base 400 to improve the firmness of the connection between the syringe holder 510 and the gas filling base 400.
Optionally, the diameter of the connecting through hole is larger than the diameter of the bolt 511. A radial position of the syringe holder 510 relative to the gas filling base 400 is adjusted by adjusting the relative positions of the axis of the connecting through hole and the axis of the bolt 511, thereby adjusting the coaxiality of the first optical fiber guiding hole and the second optical fiber guiding hole with the gas delivery hole 411 so as to improve the guiding precision. After the adjustment is completed, the bolt passes through the connecting through hole and is screwed into the threaded hole provided in the gas filling base 400 to achieve the fixed connection of the syringe holder 510 to the gas filling base 400.
The present disclosure provides a process for producing a loose tube for a totally gel-free fiber optic cable and a device for molding the same. The process for producing a loose tube for a totally gel-free fiber optic cable comprises:
extruding a loose tube material into a loose tube of a tubular shape by using a loose tube molding device; filling a compressed gas into a tube cavity of the loose tube during the molding of the loose tube; cooling the loose tube;
threading an optical fiber or an optical fiber ribbon into the tube cavity of the cooled loose tube. In the production process according to the present disclosure, the compressed gas is continuously fed into the tube cavity of the loose tube during the extrusion and molding of the loose tube, and the interior of the loose tube is supported by the compressed gas, so that the outer diameter of the loose tube is not affected by a fluctuation of the gas pressure, the loose tube has a rounded and smooth outer diameter, and it can be ensured that an appropriate excess length of an optical fiber is formed in the loose tube, so that the optical fiber has satisfactory transmission performance, and the optical fiber has a stable excess length and a good attenuation index.
Finally, it should be noted that the above embodiments are merely intended to illustrate the technical solutions of the present disclosure, but not intended to limit the present disclosure. Although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that the technical solutions disclosed in the foregoing embodiments may still be modified, or some or all of the technical features thereof may be replaced with equivalents; and these modifications or replacements will not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present disclosure.
Industrial Applicability In summary, the present disclosure provides a process for producing a loose tube for a totally gel-free fiber optic cable and a device for molding the same, by which the loose tube is molded with high quality.
Claims (20)
1. A process for producing a loose tube for a totally gel-free fiber optic cable, comprising steps of:
extruding a loose tube material into a loose tube of a tubular shape by using a loose tube molding device;
filling a compressed gas into the loose tube;
cooling the loose tube; and threading an optical fiber or an optical fiber ribbon into the loose tube.
extruding a loose tube material into a loose tube of a tubular shape by using a loose tube molding device;
filling a compressed gas into the loose tube;
cooling the loose tube; and threading an optical fiber or an optical fiber ribbon into the loose tube.
2. A process for producing a loose tube for a totally gel-free fiber optic cable, comprising:
filling a compressed gas into a tube cavity of a loose tube during extrusion and molding.
filling a compressed gas into a tube cavity of a loose tube during extrusion and molding.
3. The process for producing a loose tube for a totally gel-free fiber optic cable according to claim 1, further comprising:
cooling the molded loose tube.
cooling the molded loose tube.
4. The process for producing a loose tube for a totally gel-free fiber optic cable according to claim 2 or 3, further comprising:
threading an optical fiber or an optical fiber ribbon into the tube cavity of the loose tube.
threading an optical fiber or an optical fiber ribbon into the tube cavity of the loose tube.
5. The process for producing a loose tube for a totally gel-free fiber optic cable according to any one of claims 1 to 4, wherein the process step of filling the compressed gas into the tube cavity of the loose tube comprises:
purifying and dehumidifying the compressed gas, and filling the compressed gas into the loose tube through a gas storage tank and a flow controller.
purifying and dehumidifying the compressed gas, and filling the compressed gas into the loose tube through a gas storage tank and a flow controller.
6. The process for producing a loose tube for a totally gel-free fiber optic cable according to claim 1 or 3, wherein the process step of cooling the loose tube includes:
winding the loose tube around a primary pulling roller after the loose tube passes through a first cooling groove;
unwinding the loose tube wound around the primary pulling roller and passing the loose tube through a second cooling groove and an auxiliary pulling roller;
introducing the loose tube into a take-up device and taking up the loose tube on a take-up reel of the take-up device.
winding the loose tube around a primary pulling roller after the loose tube passes through a first cooling groove;
unwinding the loose tube wound around the primary pulling roller and passing the loose tube through a second cooling groove and an auxiliary pulling roller;
introducing the loose tube into a take-up device and taking up the loose tube on a take-up reel of the take-up device.
7. A device for molding a loose tube for a totally gel-free fiber optic cable, comprising: a head, a mold core, and a mold sleeve, wherein the head is provided with a ventilation hole, the mold core is mounted to the head, the mold core is provided with a mold core through hole, and the mold core through hole communicates with the ventilation hole; the mold sleeve is sleeved around an outer circumference of the mold core and a molding space is formed between the mold core and the mold sleeve, and the molding space communicates with the outside.
8. The device for molding a loose tube for a totally gel-free fiber optic cable according to claim 7, wherein the mold core comprises a first tapered section and a first cylindrical section, and the first cylindrical section is connected with an end of the first tapered section having a smaller inner diameter; the mold sleeve comprises a second tapered section and a second cylindrical section, and the second cylindrical section is connected with an end of the second tapered section having a smaller inner diameter;
and the second tapered section is sleeved around an outer circumference of the first tapered section and a tapered space is defined between the first tapered section and the second tapered section, the second cylindrical section is sleeved around an outer circumference of the first cylindrical section and a cylindrical space is defined between the first cylindrical section and the second cylindrical section, and the tapered space and the cylindrical space communicate with each other and form the molding space.
and the second tapered section is sleeved around an outer circumference of the first tapered section and a tapered space is defined between the first tapered section and the second tapered section, the second cylindrical section is sleeved around an outer circumference of the first cylindrical section and a cylindrical space is defined between the first cylindrical section and the second cylindrical section, and the tapered space and the cylindrical space communicate with each other and form the molding space.
9. The device for molding a loose tube for a totally gel-free fiber optic cable according to claim 8, wherein the mold core further comprises a plugging section, the plugging section is connected with an end of the first tapered section that is remote from the first cylindrical section, and the mold core through hole sequentially penetrates the plugging section, the first tapered section, and the first cylindrical section; and the plugging section is inserted into the ventilation hole.
10. The device for molding a loose tube for a totally gel-free fiber optic cable according to any one of claims 7 to 9, wherein the molding device further comprises a gas filling base mounted to the head, the gas filling base is provided with a gas filling inlet and a gas delivery hole, and the gas delivery hole communicates with the gas filling inlet and the ventilation hole, respectively.
11. The device for molding a loose tube for a totally gel-free fiber optic cable according to claim 10, wherein the gas filling inlet is provided in a side wall of the gas filling base, and the gas delivery hole penetrates the gas filling base in a length direction of the gas filling base.
12. The device for molding a loose tube for a totally gel-free fiber optic cable according to claim 10 or 11, wherein an annular sealing protrusion is provided on an outer circumferential surface of the gas filling base, the gas filling base has an insertion portion, and the insertion portion is inserted into the ventilation hole and the annular sealing projection abuts against an outer wall of the head.
13. The device for molding a loose tube for a totally gel-free fiber optic cable according to claim 12, further comprising a pressure ring, wherein the pressure ring is sleeved outside the gas filling base, the pressure ring is connected with the head, and the annular sealing protrusion is clamped between the pressure ring and the head.
14. The device for molding a loose tube for a totally gel-free fiber optic cable according to any one of claims 10 to 13, further comprising a sealing gasket, wherein the sealing gasket is located between the gas filling base and the head and is configured to seal a connection position between the gas filling base and the head.
15. The device for molding a loose tube for a totally gel-free fiber optic cable according to any one of claims 10 to 14, wherein a pressure relief valve is mounted to the gas filling base and the pressure relief valve communicates with the gas delivery hole.
16. The device for molding a loose tube for a totally gel-free fiber optic cable according to any one of claims 7 to 15, wherein the molding device further comprises an optical fiber guiding mechanism, the optical fiber guiding mechanism is connected with the head, and an interior of the optical fiber guiding mechanism communicates with the mold core through hole.
17 The device for molding a loose tube for a totally gel-free fiber optic cable according to claim 16, wherein the optical fiber guiding mechanism comprises a syringe holder and a guiding component, the syringe holder is mounted to the head, and the syringe holder is provided with a guiding through hole communicating with the mold core through hole; and the guiding component is mounted in the guiding through hole.
18. The device for molding a loose tube for a totally gel-free fiber optic cable according to claim 17, wherein the syringe holder is located in the gas delivery hole, there is a gap between an outer wall of the syringe holder and an inner wall of the gas delivery hole, and one end of the syringe holder is inserted into the mold core through hole, and there is a gap between the syringe holder and an inner wall of the mold core through hole so that the gas delivery hole, the ventilation hole, and the mold core through hole communicate with one another sequentially.
19. The device for molding a loose tube for a totally gel-free fiber optic cable according to claim 17 or 18, wherein the syringe holder comprises a connecting portion and a guiding portion coupled to each other, the guiding through hole extends sequentially through the connecting portion and the guiding portion, the guiding portion passes through the gas delivery hole and is inserted into the mold core through hole, and the connecting portion is connected with the gas filling base.
20. The device for molding a loose tube for a totally gel-free fiber optic cable according to any one of claims 17 to 19, wherein the guiding component comprises a first optical fiber guiding syringe and a second optical fiber guiding syringe, the first optical fiber guiding syringe is mounted to a first end of the syringe holder, and the second optical fiber guiding syringe is mounted to a second end of the syringe holder;
the first optical fiber guiding syringe is provided with a first optical fiber guiding hole, the second optical fiber guiding syringe is provided with a second optical fiber guiding hole, and both the first optical fiber guiding hole and the second optical fiber guiding hole communicate with the guiding through hole.
the first optical fiber guiding syringe is provided with a first optical fiber guiding hole, the second optical fiber guiding syringe is provided with a second optical fiber guiding hole, and both the first optical fiber guiding hole and the second optical fiber guiding hole communicate with the guiding through hole.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811596468.6A CN109693359A (en) | 2018-12-25 | 2018-12-25 | Full-dry optical cable loose tube production technology and its molding machine |
| CN201811596468.6 | 2018-12-25 | ||
| PCT/CN2019/104964 WO2020134182A1 (en) | 2018-12-25 | 2019-09-09 | Fully-dry optical cable loose sleeve production process and shaping apparatus thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3067014A1 true CA3067014A1 (en) | 2020-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3067014A Pending CA3067014A1 (en) | 2018-12-25 | 2019-09-09 | Process for producing loose tube for totally gel-free fiber optic cable and device for molding the same |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN109693359A (en) |
| BR (1) | BR112020007659A2 (en) |
| CA (1) | CA3067014A1 (en) |
| WO (1) | WO2020134182A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109693359A (en) * | 2018-12-25 | 2019-04-30 | 江苏亨通光电股份有限公司 | Full-dry optical cable loose tube production technology and its molding machine |
| CN113640930B (en) * | 2021-08-17 | 2023-10-13 | 中国电力科学研究院有限公司 | OPGW optical cable sensing optical fiber optical unit, manufacturing method thereof and optical cable |
| CN115189290B (en) * | 2022-08-17 | 2023-10-20 | 南京全信传输科技股份有限公司 | Threading device and threading method for radio frequency cable protective sleeve |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1200062A (en) * | 1981-12-22 | 1986-02-04 | Bicc Public Limited Company | Optical cable elements |
| CN102346286B (en) * | 2011-11-21 | 2013-06-26 | 江苏江扬电缆有限公司 | Manufacturing method of full-dry optical cable loose tube |
| CN104608357B (en) * | 2014-12-30 | 2017-04-12 | 长飞光纤光缆股份有限公司 | Mold for inflating, filling and forming of full-dry optical-cable loose tube |
| CN105589155B (en) * | 2016-03-10 | 2019-03-19 | 南京华信藤仓光通信有限公司 | The manufacturing device of Loose tube in the production method and optical cable of a kind of Full-dry optical cable and optical cable |
| CN209534105U (en) * | 2018-12-25 | 2019-10-25 | 江苏亨通光电股份有限公司 | Full-dry optical cable loose tube molding machine |
| CN109693359A (en) * | 2018-12-25 | 2019-04-30 | 江苏亨通光电股份有限公司 | Full-dry optical cable loose tube production technology and its molding machine |
-
2018
- 2018-12-25 CN CN201811596468.6A patent/CN109693359A/en active Pending
-
2019
- 2019-09-09 CA CA3067014A patent/CA3067014A1/en active Pending
- 2019-09-09 BR BR112020007659A patent/BR112020007659A2/en active Search and Examination
- 2019-09-09 WO PCT/CN2019/104964 patent/WO2020134182A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020134182A1 (en) | 2020-07-02 |
| CN109693359A (en) | 2019-04-30 |
| BR112020007659A2 (en) | 2021-07-06 |
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