CN113031179B - Built-in water-blocking joint and semi-dry optical cable - Google Patents
Built-in water-blocking joint and semi-dry optical cable Download PDFInfo
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- CN113031179B CN113031179B CN202110302007.9A CN202110302007A CN113031179B CN 113031179 B CN113031179 B CN 113031179B CN 202110302007 A CN202110302007 A CN 202110302007A CN 113031179 B CN113031179 B CN 113031179B
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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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
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- Mechanical Coupling Of Light Guides (AREA)
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Abstract
The invention belongs to the technical field of communication cables, and particularly relates to a built-in water-blocking joint and a semi-dry optical cable. The built-in water-blocking joint comprises an annular framework, a plurality of annular grooves are formed in the outer peripheral surface and the inner peripheral surface of the annular framework respectively, and water-blocking ointment and water-blocking yarn are arranged in different annular grooves respectively. When the built-in water-blocking joint is sleeved on the two tubular bodies which are coaxially nested, the built-in water-blocking joint is hermetically attached to the outer tubular body and the inner tubular body under the action of the water-blocking structures on the inner annular surface and the outer annular surface, so that a water-blocking section is formed at the mounting position of the built-in water-blocking joint, and water is prevented from penetrating through the built-in water-blocking joint. The semi-dry optical cable comprises a cable core assembly, an inner cladding and an outermost outer cladding, and a built-in water-blocking joint is sleeved on the periphery of the inner cladding at intervals. The water-blocking ointment and the water-blocking yarn are reasonably arranged in the built-in water-blocking joint, and the using amount of a water-blocking component is reduced, so that the weight of the optical cable is reduced while the water-blocking effect is ensured, and meanwhile, the influence of the water-blocking component on the cutting of the cable is avoided.
Description
Technical Field
The invention belongs to the technical field of communication cables, and particularly relates to a built-in water-blocking joint and a semi-dry optical cable.
Background
Most of the existing waterproof measures of the optical cable are water-blocking ointment or water-blocking yarn, wherein the water-blocking ointment has excellent water-blocking performance, but the disclosed scheme is that the water-blocking ointment is filled in the cable in the whole length, so that the waterproof purpose can be realized, but a large amount of water-blocking ointment can increase the weight of the cable, which brings inconvenience to the laying process of the cable, and meanwhile, the over-heavy weight of the erected optical cable easily causes that the stress in the cable cannot be released, and finally the service life of the cable is reduced. In addition, when the cable is cut and spliced, the water-blocking ointment is difficult to clean, which not only reduces the cutting and splicing efficiency, but also reduces the signal transmission capability of the cut and spliced cable.
Disclosure of Invention
The invention aims to provide a built-in water-blocking joint, which is provided with an inner ring surface and an outer ring surface, and a water-blocking structure is arranged on the inner ring surface and the outer ring surface, so that when the water-blocking joint is sleeved between two tubular bodies, the outer periphery and the inner periphery of the water-blocking joint can be sealed, and the water-blocking effect is achieved.
In order to achieve the purpose, the invention provides the following technical scheme: the built-in water-blocking joint comprises an annular framework, wherein the outer circumferential surface and the inner circumferential surface of the annular framework are respectively provided with an outer annular groove and an inner annular groove, and water-blocking structures are respectively arranged in the outer annular groove and the inner annular groove. When the built-in water-blocking joint is sleeved on the two tubular bodies which are coaxially nested, the built-in water-blocking joint is hermetically attached to the outer tubular body and the inner tubular body under the action of the water-blocking structures on the inner annular surface and the outer annular surface, so that a water-blocking section is formed at the mounting position of the built-in water-blocking joint, and water (water vapor) is prevented from passing through the built-in water-blocking joint.
Preferably, the outer annular grooves at least comprise two outer annular grooves I which are arranged at intervals, and the water-blocking structures arranged in the outer annular grooves I are annular outer water-blocking ointments; the inner annular groove at least comprises two inner annular grooves II arranged at intervals, and the water blocking structure arranged in the inner annular grooves II is annular inner water blocking ointment. The water-blocking ointment has a good water-blocking effect (hydrophobic characteristic) and good deformation performance, can be densely filled between the built-in water-blocking joints and the structures to be sealed, and realizes good sealing with a simple structure.
Preferably, the water-blocking structure arranged in the outer ring groove I further comprises an annular water-blocking yarn, the annular water-blocking yarn is attached to the bottom of the outer ring groove I and is located at the inner ring of the outer water-blocking ointment, and when the water-blocking yarn absorbs water, the water-blocking yarn expands and extrudes the outer water-blocking ointment outwards, so that the outer water-blocking ointment is forced to expand outwards and fill the gap. When the outward expanding edges expanding towards two sides are arranged on the outer edge of the outer ring groove I, the outward water-blocking grease can expand towards the outward expanding edges, so that the contact width between the outward expanding edges and an external structure can be increased, and the sealing performance is further improved.
Preferably, the inner annular groove further comprises an inner annular groove I, and the water blocking structure arranged in the inner annular groove I is an annular inner water blocking yarn. The inner water-blocking yarn is used for improving the sealing property of the inner circumferential surface and improving the water-blocking performance.
Preferably, the outer ring groove further comprises an outer ring groove II, and the water blocking structure arranged in the outer ring groove II is annular outer dry cotton; the inner annular groove further comprises an inner annular groove III, and the water blocking structure arranged in the inner annular groove III is annular inner dry cotton. The outer dry cotton and the inner dry cotton can absorb moisture passing through the built-in water-blocking joint, so that the moisture is prevented from passing through the built-in water-blocking joint, and the water-blocking performance of the built-in water-blocking joint is further improved.
Preferably, the middle part of the framework of the annular framework is provided with an annular inner cavity, central dry cotton is filled in the inner cavity, and the inner cavity is communicated with the outer annular groove II and the inner annular groove III through the connecting holes. After the outer dry cotton and the inner dry cotton absorb moisture, the moisture in the outer dry cotton and the inner dry cotton passes through the connecting holes, is absorbed by the central dry cotton and then is stored in the inner cavity. Therefore, the outer dry cotton and the inner dry cotton form a secondary drying system with the central dry cotton, so that the outer dry cotton and the inner dry cotton maintain good drying performance.
Preferably, the width of the outer annular surface of the annular framework is smaller than that of the inner annular surface, the longitudinal section profile of the annular framework is trapezoidal, the contact area between the annular framework and the inner tubular body can be increased, the pressure intensity is reduced, the deformation of the inner tubular body is prevented, the stability of the built-in water blocking joint can be increased, and the sealing performance of the inner annular surface is improved.
Preferably, the annular framework is composed of two water blocking semi-rings, the end surfaces of the two water blocking semi-rings are mutually contacted and fixed together in an adhering or inserting mode, and the two water blocking semi-rings can be clamped on the inner and outer pipe bodies from two sides and then fixed when in use, so that the water blocking structure of the inner annular surface can be prevented from being damaged, and the water blocking performance of the inner annular surface is ensured to be normal.
Another object of the present invention is to provide a semi-dry optical cable, which blocks water using water-blocking ointment and water-blocking yarn at the same time, but reduces the amount of water-blocking components by reasonably arranging the water-blocking ointment and the water-blocking yarn, thereby reducing the weight of the optical cable while ensuring the water-blocking effect, and simultaneously avoiding the influence of the water-blocking components on the cutting of the cable.
In order to achieve the above object, the present invention provides a semi-dry optical cable, including a cable core assembly and a cladding, wherein the cladding includes an inner cladding and an outermost outer cladding, and the inner cladding is disposed to be attached to an outer circumference of the cable core assembly. The built-in water-blocking joints are sleeved on the outer periphery of the inner cladding at intervals, the inner periphery of each built-in water-blocking joint is attached to the outer wall of the inner cladding, and the outer periphery of each built-in water-blocking joint is attached to the inner wall of the outer cladding; and a filling layer is arranged in a space enclosed by two adjacent built-in water-blocking joints, the inner cladding and the outer cladding, and the end surface of the filling layer is attached to the side surface of the built-in water-blocking joint.
In the technical scheme, the internal water-blocking yarn, the internal water-blocking ointment and the internal dry cotton on the inner ring surface of the built-in water-blocking joint respectively contact the periphery of the inner cladding, and the three cooperatively block water, so that the built-in water-blocking joint is ensured to be closely attached to the inner cladding, and water is prevented from passing through; the outer water-blocking ointment and the outer dry cotton on the outer ring surface of the built-in water-blocking joint are respectively attached to the inner wall of the outer cladding, so that the airtightness between the built-in water-blocking joint and the outer cladding is ensured. And the filling layer between the adjacent built-in water-blocking joints can support the outer wrapping layer and limit the built-in water-blocking joints, so that the built-in water-blocking joints are prevented from being displaced, and the semi-dry optical cable is ensured to have a long-term water-blocking function.
Description of the drawings:
the accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic view of an overall structure of a built-in water blocking joint according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the inner frame structure of the water blocking half ring in fig. 1.
Fig. 3 is a schematic plan view of the water blocking half ring in fig. 1.
Fig. 4 is a schematic plan view of the water blocking half ring in fig. 3.
Fig. 5 is a partial sectional view illustrating a semi-dry type optical cable according to an embodiment of the present invention.
Fig. 6 is a sectional view schematically illustrating a semi-dry type optical cable according to an embodiment of the present invention
Fig. 7 is a schematic plan view illustrating a structure of a semi-dry type optical cable according to an embodiment of the present invention.
In the figure, a water-blocking semi-ring 1, an inner framework 2, an outer ring groove I3, an outer ring groove II4, an inner ring groove I5, an inner ring groove II6, an inner ring groove III7, an inner cavity 8, a connecting hole 9, a jack 10, an inserting shaft 11, outer water-blocking grease 12, outer dry cotton 13, water-blocking yarn 14, inner water-blocking yarn 15, inner water-blocking grease 16, inner dry cotton 17, center dry cotton 18, a cable core group 20, an inner cladding 21, a filling layer 22, a built-in water-blocking joint 23, an outer cladding 24, an outer expanding edge 31, a water-blocking section 40 and a sealing section 50.
The specific implementation mode is as follows:
embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.
Fig. 1-4 show an embodiment of a built-in water blocking joint provided by the present invention, as shown in fig. 1, the built-in water blocking joint is annular, and includes two left and right water blocking half rings 1, and a main body of each water blocking half ring 1 is a semi-annular inner frame 2, as shown in fig. 2, an insertion hole 10 and an insertion shaft 11 are respectively disposed on contact surfaces of the two inner frames 2, the two inner frames 2 can be inserted and fixed with the insertion shaft 11 through the insertion hole 10, and form an annular frame of the built-in water blocking joint, and for ensuring sealing of the joint, an adhesive layer is coated on the contact surfaces of the two inner frames 2 before insertion.
As can be seen from the longitudinal cutting structure shown in fig. 2, five outer annular grooves are arranged on the outer circumferential surface of the annular framework at intervals, wherein the two sides and the middle part are provided with an outer annular groove I3, a water-blocking yarn 14 and an outer water-blocking ointment 12 are respectively arranged in the grooves, the water-blocking yarn 14 is positioned at the inner side of the outer water-blocking ointment 12, when moisture enters the water-blocking ointment 12, the water-blocking yarn 14 absorbs water and expands, and the outer water-blocking ointment 12 expands outwards, and the expanded outer water-blocking ointment 12 fills the outer expanding edge 31 arranged at the edge of the outer annular groove I3, so that the contact area with the outer cladding 24 is enlarged, and sealing contact is realized; the outer annular groove between two adjacent outer annular grooves I3 is an outer annular groove II4, outer dry cotton 13 is arranged in the groove, and when moisture breaks through the obstruction of the outer water-blocking factice 12, the outer dry cotton 13 absorbs the moisture. Since the cable is normally one-way permeable, even if moisture comes into contact with the outer dry cotton 13, it does not pass through the opposite sealing structure again.
As can be seen from fig. 1 and 2, the width of the outer annular surface of the whole built-in water blocking segment is smaller than that of the inner annular surface, and the longitudinal section profile of the built-in water blocking segment is trapezoidal, specifically, the side surface of the built-in water blocking segment is slightly recessed inwards. In addition, because the inner ring surface of the annular framework is wider, more dense inner ring grooves are arranged on the inner ring surface, so that the sealing performance of the interior is improved.
Specifically, of the inner ring grooves, two outermost (left and right) inner ring grooves are inner ring grooves I5 filled with inner water-blocking yarns 15, two nearest inner ring grooves to each inner ring groove I5 are inner ring grooves II6 filled with inner water-blocking ointments 16. In addition, two inner ring grooves III7 are arranged in the middle area of the inner ring surface, inner dry cotton 17 is filled in the grooves, three inner ring grooves II6 are arranged between the two inner ring grooves III7, and inner water-blocking ointment 16 is arranged in the grooves. Similar to the water blocking mode of the outer ring surface, the inner ring surface can also realize primary water blocking and absorb the water breaking through the water blocking ointment, and the water blocking structures arranged symmetrically can effectively prevent the water from passing through the built-in water blocking joints.
In the above structure, the inner ring surface and the outer ring surface of the water-blocking joint are both provided with the dry cotton, in order to enable the dry cotton on the surface layer to be in a good moisture absorption state all the time, the inner cavity 8 is arranged inside the annular framework, more central dry cotton 18 is filled in the inner cavity 8, the outer dry cotton 13 and the inner dry cotton 17 are in contact with the central dry cotton 18 through the connecting hole 9, the central dry cotton 18, the outer dry cotton 13 and the inner dry cotton 17 form a secondary drying system, and the central dry cotton 18 absorbs the moisture in the outer dry cotton 13 and the inner dry cotton 17 and keeps the moisture in the inner cavity 8.
The built-in water-blocking joint with the structure has an important purpose of blocking water for the cable, so that the influence of water on signal transmission is avoided, and water-blocking structures such as water-blocking ointment are not required to be completely filled in the cable or water-blocking yarns are not required to be arranged in the full length of the cable, so that the semi-dry optical cable can be manufactured by the built-in water-blocking joint. As shown in fig. 5 and 6, the semi-dry type optical cable includes a core assembly 20 and a cladding including an inner cladding 21 and an outermost outer cladding 24, and the inner cladding 21 is disposed to be attached to an outer circumference of the core assembly 20. The built-in water-blocking joint 23 with the structure is sleeved on the outer periphery of the inner cladding 21 at intervals (for example, 100cm), the inner periphery of the built-in water-blocking joint 23 is attached to the outer wall of the inner cladding 21, and the outer periphery of the built-in water-blocking joint is attached to the inner wall of the outer cladding 24; and a filling layer 22 is arranged in a space enclosed by two adjacent built-in water blocking joints 23, the inner cladding 21 and the outer cladding 24, and the end surface of the filling layer is attached to the side surface of the built-in water blocking joint 23. As shown in fig. 7, the semi-dry optical cable is provided with built-in water-blocking joints 23 at intervals, the built-in water-blocking joints 23 divide the whole optical cable into water-blocking sections 40 and sealing sections 50 which are arranged in a staggered and cyclic manner, and only the water-blocking section 40 is provided with paste water-blocking ointment, so that the optical cable is semi-dry, and when the optical cable is cut, the water-blocking section 40 is cut, thereby avoiding the influence of the grease on the cutting work and ensuring that the cut optical cable has normal signal transmission capability. In addition, the water-blocking structures in the optical cable are compressed into the individual built-in water-blocking segments 23, so that the optical cable has a much smaller weight than an optical cable of the same length.
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A built-in water-blocking joint is characterized in that: the water-blocking device comprises an annular framework, wherein an outer annular groove and an inner annular groove are respectively arranged on the outer peripheral surface and the inner peripheral surface of the annular framework, and water-blocking structures are respectively arranged in the outer annular groove and the inner annular groove;
the outer ring grooves at least comprise two outer ring grooves I which are arranged at intervals, and the water-blocking structures arranged in the outer ring grooves I are annular outer water-blocking ointments; the inner ring-shaped groove at least comprises two inner ring grooves II which are arranged at intervals, and the water-blocking structure arranged in the inner ring grooves II is annular inner water-blocking ointment;
the water-blocking structure arranged in the outer ring groove I also comprises annular water-blocking yarns, the water-blocking yarns are arranged by being attached to the bottom of the outer ring groove I and are positioned at the inner ring of the outer water-blocking factice, and when the water-blocking yarns absorb water, the water-blocking yarns expand and extrude the outer water-blocking factice outwards;
the inner annular groove also comprises an inner annular groove I, and the water-blocking structure arranged in the inner annular groove I is annular inner water-blocking yarn;
the outer ring groove also comprises an outer ring groove II, and the water-blocking structure arranged in the outer ring groove II is annular outer dry cotton; the inner annular groove further comprises an inner annular groove III, and the water blocking structure arranged in the inner annular groove III is annular inner dry cotton.
2. The built-in water-blocking joint as claimed in claim 1, wherein: the outer edge of the outer ring groove I is arranged in the direction; and the outer expanding edges of the two sides are expanded.
3. The built-in water-blocking joint as claimed in claim 1, wherein: the middle of the framework of the annular framework is provided with an annular inner cavity, central dry cotton is filled in the inner cavity, and the inner cavity is communicated with the outer annular groove II and the inner annular groove III through the connecting holes.
4. The built-in water-blocking joint as claimed in claim 1, wherein: the width of the outer ring surface of the annular framework is smaller than that of the inner ring surface, and the longitudinal section profile of the annular framework is trapezoidal.
5. The built-in water-blocking joint according to any one of claims 1 to 4, wherein: the annular framework is composed of two water-blocking semi-rings, and the end surfaces of the two water-blocking semi-rings are mutually contacted and fixed together in an adhering or inserting mode.
6. The semi-dry optical cable comprises a cable core assembly and a cladding, and is characterized in that: wherein the cladding comprises an inner cladding and an outermost outer cladding, wherein the inner cladding is arranged by being attached to the outer periphery of the cable core assembly, the outer periphery of the inner cladding is sleeved with the built-in water-blocking joint according to any one of claims 2 to 5 at intervals, the inner periphery of the built-in water-blocking joint is attached to the outer wall of the inner cladding, and the outer periphery of the built-in water-blocking joint is attached to the inner wall of the outer cladding; and a filling layer is arranged in a space enclosed by the two adjacent built-in water-blocking joints, the inner cladding and the outer cladding, and the end surface of the filling layer is attached to the side surface of the built-in water-blocking joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110302007.9A CN113031179B (en) | 2021-03-22 | 2021-03-22 | Built-in water-blocking joint and semi-dry optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110302007.9A CN113031179B (en) | 2021-03-22 | 2021-03-22 | Built-in water-blocking joint and semi-dry optical cable |
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| Publication Number | Publication Date |
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| CN113031179A CN113031179A (en) | 2021-06-25 |
| CN113031179B true CN113031179B (en) | 2022-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110302007.9A Active CN113031179B (en) | 2021-03-22 | 2021-03-22 | Built-in water-blocking joint and semi-dry optical cable |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113985545B (en) * | 2021-09-30 | 2023-09-15 | 富通集团（嘉善）通信技术有限公司 | Semi-dry type optical fiber ribbon cable |
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| KR20000045660A (en) * | 1998-12-30 | 2000-07-25 | 강병호 | Asymmetrical slotted-rod and triangular slotted-rod, and super-multifiber cable having them |
| CN103985456A (en) * | 2014-04-26 | 2014-08-13 | 芜湖航天特种电缆厂 | Water stopping flat cable for ships and warships |
| CN210865714U (en) * | 2019-10-28 | 2020-06-26 | 江苏东强股份有限公司 | Full water-blocking power cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| MXPA03002208A (en) * | 2003-03-13 | 2004-09-15 | Servicios Condumex Sa | Dry water-resistant coaxial cable and manufacturing method of the same. |
| CN206431327U (en) * | 2016-12-26 | 2017-08-22 | 江苏盈科通信科技有限公司 | A kind of underwater optical cable easy to maintenance |
| CN109445053B (en) * | 2018-12-28 | 2020-06-12 | 杭州富通通信技术股份有限公司 | Corrosion-resistant optical cable |
| CN210777876U (en) * | 2019-10-22 | 2020-06-16 | 上海长跃通信技术有限公司 | Semi-dry type marine photoelectric hybrid cable with eccentric structure |
| CN211554414U (en) * | 2020-03-24 | 2020-09-22 | 宏安集团有限公司 | Optical cable with threaded steel pipe |
| CN111883310B (en) * | 2020-08-04 | 2021-11-23 | 中天科技海缆股份有限公司 | High-voltage dynamic submarine cable |
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- 2021-03-22 CN CN202110302007.9A patent/CN113031179B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000045660A (en) * | 1998-12-30 | 2000-07-25 | 강병호 | Asymmetrical slotted-rod and triangular slotted-rod, and super-multifiber cable having them |
| CN103985456A (en) * | 2014-04-26 | 2014-08-13 | 芜湖航天特种电缆厂 | Water stopping flat cable for ships and warships |
| CN210865714U (en) * | 2019-10-28 | 2020-06-26 | 江苏东强股份有限公司 | Full water-blocking power cable |
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| CN113031179A (en) | 2021-06-25 |
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