CN113885151A - Sea-land joint box for low-temperature environment and installation method - Google Patents
Sea-land joint box for low-temperature environment and installation method Download PDFInfo
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- CN113885151A CN113885151A CN202111259328.1A CN202111259328A CN113885151A CN 113885151 A CN113885151 A CN 113885151A CN 202111259328 A CN202111259328 A CN 202111259328A CN 113885151 A CN113885151 A CN 113885151A
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- 238000009434 installation Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 134
- 230000003287 optical effect Effects 0.000 claims abstract description 67
- 239000013307 optical fiber Substances 0.000 claims abstract description 37
- 239000000835 fiber Substances 0.000 claims abstract description 33
- 238000007906 compression Methods 0.000 claims description 76
- 230000006835 compression Effects 0.000 claims description 74
- 230000001681 protective effect Effects 0.000 claims description 31
- 238000004873 anchoring Methods 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 2
- 239000002674 ointment Substances 0.000 claims 2
- 238000004891 communication Methods 0.000 abstract description 3
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007769 metal material Substances 0.000 description 3
- 229910052755 nonmetal Inorganic materials 0.000 description 3
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
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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
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
- G02B6/4441—Boxes
- G02B6/4446—Cable boxes, e.g. splicing boxes with two or more multi fibre cables
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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
- G02B6/443—Protective covering
-
- 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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Cable Accessories (AREA)
Abstract
The invention relates to a sea-land joint box for a low-temperature environment and an installation method, and belongs to the field of optical cable communication. The sea and land joint box comprises a fiber coiling box, a pressure resistant cylinder and sealing end covers at two ends of the pressure resistant cylinder, wherein the fiber coiling box is positioned in the pressure resistant cylinder, and optical cables respectively penetrate through the sealing end covers at two ends of the pressure resistant cylinder and are connected into the fiber coiling box; sealing treatment is carried out between the sealing end cover and the pressure resistant cylinder and between the sealing end cover and the optical cable, and low-temperature optical fiber filling factice is injected into the pressure resistant cylinder. The invention ensures that the connector box is not restricted to be only laid in a manhole any more, greatly enhances the compressive strength, solves the problem that the traditional sea and land connector box is limited in use environment, and ensures that the cable end and the internal structure are safer and more reliable.
Description
Technical Field
The invention relates to a sea-land joint box for a low-temperature environment and an installation method, and belongs to the field of optical cable communication.
Background
The optical cable joint box is a connection protection device which provides optical, sealing and mechanical strength continuity for each optical cable when the optical cable with each structure is communicated and branched among overhead, pipeline, direct-buried laying modes and the like. Nowadays, as communication is increasingly important in production and life, the usage amount of the optical cable joint box is also increasing. However, the existing optical cable joint box has the following defects:
1. the current common sea-land joint box can not meet the requirement of adapting to the extreme low temperature environment (60 ℃ below zero), and the use is limited;
2. when the existing common sea and land joint box meets the basic function of the above complaint, a high-strength plastic shell is mostly used, and the common sea and land joint box can only be used in a manhole and cannot block external impact;
3. the cable end entry and exit locations of the currently available sea and land closures are not protected and do not prevent excessive bending of the optical fibers.
Disclosure of Invention
The invention aims to overcome the structural defects of the conventional joint box, solve the problem of using the sea and land joint box in an extremely low temperature environment, strengthen the tensile strength of an optical cable, reduce the integration difficulty and protect a port optical cable while ensuring the sealing performance of the sea and land joint box.
The technical scheme adopted by the invention is as follows:
the invention provides a sea and land joint box for a low-temperature environment, which comprises a fiber coiling box, a compression-resistant cylinder and sealing end covers at two ends of the compression-resistant cylinder, wherein the fiber coiling box is positioned in the compression-resistant cylinder, and optical cables respectively penetrate through the sealing end covers at two ends of the compression-resistant cylinder to be connected into the fiber coiling box; and sealing treatment is carried out between the sealing end cover and the pressure-resistant cylinder and between the sealing end cover and the optical cable, and low-temperature optical fiber filling factice is injected into the pressure-resistant cylinder.
By adopting the scheme, the compression-resistant cylinder is made of metal materials and can resist partial external impact, the protective sleeve is made of non-metal materials, the optical cable at the inlet and the outlet of the sealing end cover is protected to the greatest extent, and breakage caused by overlarge bending is prevented.
The sealing treatment and the filling of the low-temperature optical fiber filling factice are combined, external water vapor can be isolated, the influence of the outside on mechanical forces such as vibration, impact, bending and the like of the optical fiber connection part can be relieved, and the whole sea and land joint box can meet the requirement of a low-temperature use environment.
Further, an optical cable fixing device is arranged on the inner side of the sealing end cover and comprises a cable end fixing piece, a cable end locking piece and two anchoring pieces; the cable end fixing piece, the cable end locking piece and the anchoring piece are provided with arc-shaped grooves at the contact part with the optical cable.
The cable end fixing piece and the cable end locking piece are of a half-open structure, the cable end fixing piece is fixed on the inner side face of the sealing end cover, and the cable end locking piece is connected with the cable end fixing piece through screws to clamp and fix the optical cable together.
Similarly, two anchor assembly are half open-close type structure, and two anchor assembly pass through the screw respectively with optical cable armor steel wire layer anchor in cable end mounting, the lateral surface of cable end retaining member and between the anchor assembly that corresponds, can further the centre gripping fixed optical cable on the one hand, on the other hand also can press the armor steel wire layer of solid after skinning.
By adopting the scheme, the optical cable entering the joint box is firstly extruded and fixed by the cable end fixing piece and the cable end locking piece, and the armor steel wire is extruded by the anchoring piece at the position where the outer PE layer is stripped, so that the compressive strength of the optical cable is enhanced, and the tensile strength can reach 600N;
furthermore, the outer side surfaces of the two sealing end covers are respectively provided with a cable end protective sleeve, a through hole for the optical cable to pass through is formed in the cable end protective sleeve, an extension part is arranged on the outer side surface of each sealing end cover, and the sealing end covers and the cable end protective sleeves are connected into a whole through the extension parts and the through hole threads in a screwed mode.
The sealing end cover is arranged at the inner end part of the pressure-resistant cylinder, and a sealing ring is arranged between the sealing end cover and the inner wall of the pressure-resistant cylinder; the outer side surface of the sealing end cover is fixedly connected with a compression-resistant cylinder limiting ring, and the compression-resistant cylinder limiting ring is clamped between the end surface of the compression-resistant cylinder and the end surface of the compression-resistant cylinder protective sleeve.
Adopt above-mentioned scheme, sealed mainly relies on: after a sealing groove of the end cover is sealed and a sealing ring is installed, a pressure-resistant cylinder is used for extruding the sealing ring to achieve the sealing effect; the installation position of the compression-resistant cylinder depends on: the compression-resistant cylinder limiting ring connected with the sealing end cover is tightly locked by using a screw and a spring washer, and the compression-resistant cylinder limiting ring is clamped on the end face of the compression-resistant cylinder, so that the movement of the compression-resistant cylinder is limited.
Furthermore, an oil plug is arranged at the position of the sealing end cover, and a limiting step surface matched with the oil plug is arranged on the end surface of the pressure-resistant cylinder protective sleeve.
After the optical fiber connection is completed, the installation of an external compression-resistant cylinder is completed, low-temperature optical fiber filling factice is poured through an oil filling port on the sealing end cover surface, the filling port is screwed down through an oil plug after the injection is completed, the sealing of the oil filling port is completed through a sealing ring of the oil plug, and the optical fiber filling factice can be normally used at the temperature of 60 ℃ below zero (the application temperature is correspondingly different according to the different properties of the injected factice).
The second purpose of the invention is to provide a method for installing a sea and land joint box for a low-temperature environment, which comprises the following steps:
1) stripping the outer PE layer from the cable end of the optical cable;
the cable is passed through the components to be used in sequence: the cable end protective sleeve, the compression-resistant cylinder limiting ring, the sealing end cover and the compression-resistant cylinder are arranged on the cable end protective sleeve;
the optical cable on the other side passes through the sequence as follows: the cable end protective sleeve, the compression-resistant cylinder limiting ring and the sealing end cover are arranged on the cable end protective sleeve;
2) fixing the PE-free copper pipe section of the optical cable by using the cable end fixing piece and the cable end locking piece:
the cable end fixing piece and the cable end locking piece are of a half-open type structure, the cable end fixing piece is fixed on the inner side face of the sealing end cover, and the cable end locking piece is connected with the cable end fixing piece through a screw to clamp and fix the optical cable together;
3) fixing the armored steel wire by an anchoring part:
two anchoring parts in a half-to-half opening and closing structure are adopted, and the optical cable armored steel wire is anchored between the cable end fixing part and the outer side surface of the cable end locking part and the corresponding anchoring part through screws respectively;
4) welding the coiled fibers in the fiber coiling box according to the number of the fiber cores, installing and fixing the fiber baffle by using screws, limiting the position of the optical fibers, and then installing a cover plate of the fiber coiling box;
5) the coiled fiber box is positioned in the compression cylinder, the side wall of the sealing end cover is provided with the sealing ring, the sealing end cover is arranged at the inner end part of the compression cylinder, and the sealing end covers at two sides are pushed by hands to be symmetrically arranged in the compression cylinder;
6) fixing the compression-resistant cylinder limiting ring on one side with the corresponding sealing end cover by using a locking screw and a spring washer, and adjusting the position of the compression-resistant cylinder to ensure that the compression-resistant cylinder limiting ring is attached to the end face of the compression-resistant cylinder; then installing the compression-resistant cylinder limiting ring on the other side in the same way, and limiting the position of the compression-resistant cylinder after the installation;
the optical cable and the sealing end cover are sealed by a heat-shrinkable sleeve;
7) injecting low-temperature optical fiber filling factice into an oil filling port of the sealing end cover, and then sealing the filling port by using an oil plug; specifically, the method comprises the following steps:
firstly, installing an oil plug end cap on an oil filling port of any side of a sealing end cap, inclining the sealing end cap without the oil plug end cap upwards, injecting low-temperature optical fiber filling factice until the low-temperature optical fiber filling factice reaches the oil filling port, stopping injecting, and sealing the oil filling port by using the oil plug end cap; then the sealing end cover at the other end is inclined upwards, the oil plug is opened, the low-temperature optical fiber filling factice is injected until the low-temperature optical fiber filling factice reaches the oil filling opening, and then the low-temperature optical fiber filling factice is closed by the oil plug;
8) after oil injection is completed, the cable end protective sleeve is screwed into the external thread of the extending part of the sealing end cover to be fixed, and the external optical cable is prevented from being excessively bent.
The innovation points of the invention are as follows:
1. injecting low-temperature optical fiber filling factice into an oil filling opening of the sealing end cover to achieve the effect that the whole body can be normally used in a low-temperature environment, and sealing the oil filling opening of the sealing end cover by using an oil plug;
2. the sealing is realized by integrally sealing a sealing ring in a sealing groove of the sealing end cover and a compression sealing ring of the compression resistant cylinder;
3. the compression-resistant cylinder limiting ring and the sealing end cover use an end cover locking screw and a spring washer, and the compression-resistant cylinder limiting ring limits the movement of the compression-resistant cylinder after compressing the end face of the compression-resistant cylinder;
4. the cable armor steel wire layer is tightly pressed by the screw to the anchoring part, the steel wire layer extrudes the cable end fixing part and the surface of the locking part to fasten the steel wire layer, so that the tensile strength of the optical cable is increased;
5. in order to protect the end cover and part of the optical cable entering the end cover, a cable end non-metal protective sleeve is used for protection.
The cable type with the armored steel wire can be connected, external water vapor and dust can be isolated, external impact can be resisted, the effect of partial cables entering the joint box can be protected, low-temperature factice is injected through the oil injection port of the sealing end cover, and the joint box can bear the environment temperature below 60 ℃ below zero (the environment temperature is correspondingly different according to different properties of the injected factice); sealing mainly relies on the end cover sealing washer, and the outer steel wire anchor increases holistic tensile strength, and whole shock resistance is improved to outside crushing barrel, and the oil filler point of end cover face has guaranteed that low temperature oleamen can get into smoothly, and the cable of end cover gets into the mode that the end used heat shrinkage bush to seal the processing, and the safety of cable has been guaranteed to cable protective sheath furthest.
The invention ensures that the connector box is not restricted to be only laid in a manhole any more, greatly enhances the compressive strength, solves the problem that the traditional sea and land connector box is limited in use environment, and ensures that the cable end and the internal structure are safer and more reliable.
Drawings
Fig. 1 is a schematic view of a disassembled structure of the joint box of the invention;
fig. 2 is a cross-sectional view of the splice enclosure of the present invention after installation;
FIG. 3 is a schematic view of the construction of the cable securing device of the present invention;
FIG. 4 is a schematic view of the sealing ring and end cap extrusion of the present invention;
FIG. 5 is a schematic exterior view of the closure of the present invention;
in the figure: 1-cable end protective sleeve, 2-compression-resistant cylinder limiting ring, 3-sealing end cover, 4-compression-resistant cylinder, 5-anchoring part, 6-cable end fixing part, 7-fiber coiling box, 8-fiber coiling box cover plate, 9-limiting ring locking screw, 10-limiting ring spring washer, 11-anchoring part fixing screw, 12-oil plug, 13-fiber coiling box cover plate fixing screw, 14-optical fiber baffle, 15-cable end locking part, 16-cable end fixing part fixing screw, 17-cable end locking part locking screw, 18-sealing ring and 19-extension part on the outer side surface of the sealing end cover.
Detailed Description
Example 1
As shown in fig. 1, 2 and 5, the sea and land splice closure for low temperature environment comprises a fiber coiling box 7, a compression cylinder 4 and sealing end covers 3 at two ends of the compression cylinder, wherein the fiber coiling box is positioned in the compression cylinder, and optical cables respectively pass through the sealing end covers at two ends of the compression cylinder and are connected into the fiber coiling box; sealing treatment is carried out between the sealing end cover and the pressure resistant cylinder and between the sealing end cover and the optical cable, low-temperature optical fiber filling factice is injected into the pressure resistant cylinder, and an oil plug 12 is arranged at the position of the sealing end cover.
The outer side surfaces of the two sealing end covers are respectively provided with a cable end protective sleeve 1, a through hole for the optical cable to pass through is formed in the cable end protective sleeve, an extension part 19 is arranged on the outer side surface of each sealing end cover, and the sealing end covers and the cable end protective sleeves are connected into a whole through the extension parts and the through hole threads in a screwed mode. The contact surface of the extension part and the inner wall of the through hole is a step surface, the sealing degree between the extension part and the through hole can be improved, and the optical cable and the sealing end cover are sealed by a heat-shrinkable sleeve.
The sealing end cover is arranged at the inner end part of the pressure-resistant cylinder, and a sealing ring 18 (shown in figure 4) is arranged between the sealing end cover and the inner wall of the pressure-resistant cylinder; the outer side surface of the sealing end cover is fixedly connected with a pressure-resistant cylinder limiting ring 2, and the pressure-resistant cylinder limiting ring is clamped between the end surface of the pressure-resistant cylinder and the end surface of the pressure-resistant cylinder protective sleeve.
In this embodiment, the sealing mainly relies on:
after a sealing groove of the end cover is sealed and a sealing ring is installed, a pressure-resistant cylinder is used for extruding the sealing ring to achieve the sealing effect;
the installation position of the compression-resistant cylinder depends on:
the compression-resistant cylinder limiting ring connected with the sealing end cover is tightly locked by a screw 9 and a spring washer 10, and the compression-resistant cylinder limiting ring is clamped on the end face of the compression-resistant cylinder, so that the movement of the compression-resistant cylinder is limited.
The pressure-resistant cylinder is made of metal materials and can resist partial external impact, the protective sleeve is made of nonmetal materials, the optical cables at the inlet and the outlet of the sealing end cover are protected to the greatest extent, and breakage caused by overlarge bending is prevented.
Example 2
On the basis of the embodiment 1, as shown in fig. 3, the inner side of the sealing end cover is provided with an optical cable fixing device which comprises a cable end fixing piece 6, a cable end locking piece 15 and two anchoring pieces 5; the cable end fixing piece, the cable end locking piece and the anchoring piece are provided with arc-shaped grooves at the contact part with the optical cable.
The cable end fixing piece and the cable end locking piece are of a half-open structure, the cable end fixing piece is fixed on the inner side face of the sealing end cover through a fixing screw 16, and the cable end locking piece is connected with the cable end fixing piece through a locking screw 17 to clamp and fix the optical cable together.
Similarly, two anchor assembly are half open-close type structure, and two anchor assembly pass through set screw 11 respectively with optical cable armor steel wire layer anchor in cable end mounting, the lateral surface of cable end retaining member and between the anchor assembly that corresponds, can further the centre gripping fixed optical cable on the one hand, on the other hand also can press the armor steel wire layer of solid skin.
By adopting the scheme, the optical cable entering the joint box is firstly extruded and fixed by the cable end fixing piece and the cable end locking piece, and the armor steel wire is extruded by the anchoring piece at the position of the outer PE layer which is stripped, so that the compressive strength of the optical cable is enhanced, and the tensile strength of 600N can be achieved.
Example 3
As shown in fig. 1 and 2, a groove matched with the locking screw of the limiting ring is formed in the end face of the pressure-resistant cylinder protective sleeve to form a limiting step face matched with the oil plug, and after the pressure-resistant cylinder is installed, the step face can limit the oil plug and enhance the sealing performance of the oil filling port.
Example 4
On the basis of embodiment 3, the installation method of the sea and land joint box for the low-temperature environment comprises the following steps:
1) stripping PE from the cable end of the optical cable, stripping an outer PE layer and reserving few outer armor steel wires;
the cable is passed through the components to be used in sequence: the cable end protection sleeve comprises a cable end protection sleeve 1, a compression-resistant cylinder limiting ring 2, a sealing end cover 3 and a compression-resistant cylinder 4;
the optical cable on the other side passes through the sequence as follows: the cable end protection sleeve comprises a cable end protection sleeve 1, a compression-resistant cylinder limiting ring 2 and a sealing end cover 3;
2) fixing the peeling section of the optical cable by using a cable end fixing piece and a cable end locking piece:
the cable end fixing piece 6 and the cable end locking piece 15 are of a half-open type structure, the cable end fixing piece is fixed on the inner side face of the sealing end cover through a fixing screw 16, and the cable end locking piece is connected with the cable end fixing piece through a locking screw 17 to clamp and fix the optical cable together;
3) fixing the armor steel wire layer by using an anchoring part:
two anchoring parts 5 in a half-to-half opening and closing structure are adopted, and an optical cable armored steel wire layer is anchored between the cable end fixing part and the outer side surface of the cable end locking part and the corresponding anchoring part through fixing screws 11 respectively, so that the steel wire layer is compressed;
4) the optical fibers are welded in the fiber coiling box 7 according to the number of the optical fiber cores, the optical fiber baffle 14 is fixed by screws, the position of the optical fibers is limited, the four fiber coiling box cover plate fixing screws 13 are used for installing the fiber coiling box cover plate 8, and the other side of the fiber coiling box cover plate 8 is also used for installing the fiber coiling box cover plate 8 without coiling the optical fibers;
5) the fiber coiling box 7 is positioned in the compression cylinder 4, the sealing ring 18 is arranged in the sealing groove on the side wall of the sealing end cover, the sealing end cover is arranged at the inner end part of the compression cylinder, and the sealing end covers at two sides are pushed by hands to be symmetrically arranged in the compression cylinder;
6) fixing the compression-resistant cylinder limiting ring on one side with the corresponding sealing end cover by using a locking screw 9 and a spring washer 10, and adjusting the position of the compression-resistant cylinder to ensure that the compression-resistant cylinder limiting ring is attached to the end face of the compression-resistant cylinder; then installing the compression-resistant cylinder limiting ring on the other side in the same way, and limiting the position of the compression-resistant cylinder after the installation;
7) injecting low-temperature optical fiber filling factice into an oil filling port of the sealing end cover, and then sealing the filling port by using an oil plug; the gap between the optical cable and the inlet of the sealing end cover is sealed by a heat-shrinkable sleeve; specifically, the method comprises the following steps:
firstly, installing an oil plug 12 at an oil filling port of any side of a sealing end cover, inclining the sealing end cover without the oil plug upwards, injecting low-temperature optical fiber filling factice until the low-temperature optical fiber filling factice reaches the oil filling port, stopping injecting, and sealing the oil filling port by using the oil plug; then the sealing end cover at the other end is inclined upwards, the oil plug is opened, the low-temperature optical fiber filling factice is injected until the low-temperature optical fiber filling factice reaches the oil filling opening, and then the low-temperature optical fiber filling factice is closed by the oil plug;
8) after oil injection is completed, the cable end protective sleeve is screwed into the external thread of the extending part of the sealing end cover to be fixed, and the external optical cable is prevented from being excessively bent.
The above case is only an installation process of one situation, and corresponding changes can be made according to different environments and use requirements, and a plurality of changes and improvements are protected by the present invention.
Claims (10)
1. The sea-land joint box for the low-temperature environment is characterized by comprising a fiber coiling box, a compression-resistant cylinder and sealing end covers at two ends of the compression-resistant cylinder, wherein the fiber coiling box is positioned in the compression-resistant cylinder, and optical cables respectively penetrate through the sealing end covers at two ends of the compression-resistant cylinder and are connected into the fiber coiling box; and sealing treatment is carried out between the sealing end cover and the pressure-resistant cylinder and between the sealing end cover and the optical cable, and low-temperature optical fiber filling factice is injected into the pressure-resistant cylinder.
2. The sea-land joint box for the low-temperature environment as claimed in claim 1, wherein an optical cable fixing device is arranged on the inner side of the sealing end cover, and the optical cable fixing device comprises a cable end fixing piece and a cable end locking piece; the cable end fixing piece and the cable end locking piece are of a half-open structure, the cable end fixing piece is fixed on the inner side face of the sealing end cover, and the cable end locking piece is connected with the cable end fixing piece through screws to clamp and fix the optical cable together.
3. The sea-land joint box for the low-temperature environment as claimed in claim 2, wherein the optical cable fixing device further comprises two anchoring members, and the two anchoring members are used for anchoring the armored wire layer of the optical cable between the cable end fixing member and the outer side surface of the cable end locking member and the corresponding anchoring member respectively through screws.
4. The sea-land joint box for low-temperature environment as claimed in claim 3, wherein the cable end fixing member, the cable end locking member and the anchoring member are provided with arc-shaped grooves at the contact portions with the optical cable.
5. The sea-land joint box for low-temperature environment as claimed in claim 1, wherein the outer side surfaces of the two end caps are respectively provided with a cable end protective sleeve, the cable end protective sleeve is internally provided with a through hole for the optical cable to pass through, the outer side surfaces of the end caps are provided with an extension part, and the end caps and the cable end protective sleeve are screwed into a whole through the extension part and the through hole.
6. The sea-land joint box for low-temperature environment as claimed in claim 5, wherein the sealing end cap is disposed at the inner end of the pressure-resistant cylinder, and a sealing ring is disposed between the sealing end cap and the inner wall of the pressure-resistant cylinder; the outer side surface of the sealing end cover is fixedly connected with a compression-resistant cylinder limiting ring, and the compression-resistant cylinder limiting ring is clamped between the end surface of the compression-resistant cylinder and the end surface of the compression-resistant cylinder protective sleeve.
7. The sea-land joint box for the low-temperature environment as claimed in claim 6, wherein an oil plug is arranged at the sealing end cover, and a limiting step surface matched with the oil plug is arranged on the end surface of the pressure-resistant cylinder protective sleeve.
8. The installation method of the sea-land joint box for the low-temperature environment is characterized by comprising the following steps:
1) stripping the outer PE layer from the cable end of the optical cable;
the cable is passed through the components to be used in sequence: the cable end protective sleeve, the compression-resistant cylinder limiting ring, the sealing end cover and the compression-resistant cylinder are arranged on the cable end protective sleeve;
the optical cable on the other side passes through the sequence as follows: the cable end protective sleeve, the compression-resistant cylinder limiting ring and the sealing end cover are arranged on the cable end protective sleeve;
2) fixing the PE-free layer of the optical cable by using the cable end fixing piece and the cable end locking piece:
the cable end fixing piece and the cable end locking piece are of a half-open type structure, the cable end fixing piece is fixed on the inner side face of the sealing end cover, and the cable end locking piece is connected with the cable end fixing piece through a screw to clamp and fix the optical cable together;
3) fixing the armor steel wire layer by using an anchoring part:
two anchoring parts in a half-to-half opening and closing structure are adopted, and the optical cable armored steel wire is anchored between the cable end fixing part and the outer side surface of the cable end locking part and the corresponding anchoring part through screws respectively;
4) welding the coiled fibers in the fiber coiling box according to the number of the fiber cores, installing and fixing the fiber baffle by using screws, limiting the position of the optical fibers, and then installing a cover plate of the fiber coiling box;
5) the coiled fiber box is positioned in the compression cylinder, the side wall of the sealing end cover is provided with the sealing ring, the sealing end cover is arranged at the inner end part of the compression cylinder, and the sealing end covers at two sides are pushed by hands to be symmetrically arranged in the compression cylinder;
6) fixing the compression-resistant cylinder limiting ring on one side with the corresponding sealing end cover by using a locking screw and a spring washer, and adjusting the position of the compression-resistant cylinder to ensure that the compression-resistant cylinder limiting ring is attached to the end face of the compression-resistant cylinder; then installing the compression-resistant cylinder limiting ring on the other side in the same way, and limiting the position of the compression-resistant cylinder after the installation;
7) injecting low-temperature optical fiber filling factice into an oil filling port of the sealing end cover, and then sealing the filling port by using an oil plug;
8) after oil injection is completed, the cable end protective sleeve is screwed into the external thread of the extending part of the sealing end cover to be fixed, and the external optical cable is prevented from being excessively bent.
9. The method for installing a sea-land joint box for a low-temperature environment as claimed in claim 8, wherein in step 6), the optical cable and the sealing end cap are sealed by using a heat-shrinkable sleeve.
10. The method for installing a sea-land joint box for a low-temperature environment according to claim 8, wherein in step 7), an oil plug is installed at the oil filling port of any one of the sealing end covers, the sealing end cover without the oil plug is inclined upwards, low-temperature optical fiber filling ointment is injected until the low-temperature optical fiber filling ointment reaches the oil filling port, and the oil filling port is closed by the oil plug; and then the sealing end cover at the other end is inclined upwards, the oil plug is opened, the low-temperature optical fiber filling factice is injected until the low-temperature optical fiber filling factice reaches the oil filling opening, and then the low-temperature optical fiber filling factice is closed by the oil plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111259328.1A CN113885151B (en) | 2021-10-28 | 2021-10-28 | Sea Liu Jietou box for low-temperature environment and installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111259328.1A CN113885151B (en) | 2021-10-28 | 2021-10-28 | Sea Liu Jietou box for low-temperature environment and installation method |
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| CN113885151A true CN113885151A (en) | 2022-01-04 |
| CN113885151B CN113885151B (en) | 2024-03-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115407469A (en) * | 2022-08-31 | 2022-11-29 | 中航宝胜海洋工程电缆有限公司 | Bipolar cable joint box |
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| CN105811350A (en) * | 2016-03-21 | 2016-07-27 | 中天科技海缆有限公司 | Underwater photoelectric separation connecting cavity and connecting method therefor |
| EP3062137A1 (en) * | 2015-02-24 | 2016-08-31 | Draka Comteq B.V. | Method of connecting an optical fiber cable to a closure box, and a connector and assembly therefore |
| CN105954847A (en) * | 2016-06-30 | 2016-09-21 | 江苏亨通海洋光网系统有限公司 | Sea and land cable joint box |
| CN112130267A (en) * | 2020-10-27 | 2020-12-25 | 上海亨通海洋装备有限公司 | Submarine optical cable connection box |
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| CN101183780A (en) * | 2007-10-15 | 2008-05-21 | 江苏中天科技股份有限公司 | Seabed fiber compound power cable connector box and connection technique thereof |
| EP3062137A1 (en) * | 2015-02-24 | 2016-08-31 | Draka Comteq B.V. | Method of connecting an optical fiber cable to a closure box, and a connector and assembly therefore |
| CN105811350A (en) * | 2016-03-21 | 2016-07-27 | 中天科技海缆有限公司 | Underwater photoelectric separation connecting cavity and connecting method therefor |
| CN105954847A (en) * | 2016-06-30 | 2016-09-21 | 江苏亨通海洋光网系统有限公司 | Sea and land cable joint box |
| CN112130267A (en) * | 2020-10-27 | 2020-12-25 | 上海亨通海洋装备有限公司 | Submarine optical cable connection box |
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| CN115407469A (en) * | 2022-08-31 | 2022-11-29 | 中航宝胜海洋工程电缆有限公司 | Bipolar cable joint box |
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| CN113885151B (en) | 2024-03-19 |
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