WO2016045430A1

WO2016045430A1 - Deep-sea optical cable extrusion molding branch joint box and mounting process therefor

Info

Publication number: WO2016045430A1
Application number: PCT/CN2015/083678
Authority: WO
Inventors: 蔡卫兵; 郭朝阳; 蔡炳余; 耿敏敏; 薛建林
Original assignee: 中天科技海缆有限公司
Priority date: 2014-09-22
Filing date: 2015-07-09
Publication date: 2016-03-31
Also published as: CN104216081A; CN104216081B

Abstract

A deep-sea optical cable extrusion molding branch joint box and a mounting process therefor comprise an internally armored steel wire fixing device, bearing nuts (4), a support tray (10), an inner barrel body (8), a prefabricated barrel (9) and an injection molding sealing body (1), wherein sealing pads (5) and the bearing nuts (4) are arranged on the two ends of the support tray (10); the internally armored steel wire fixing device comprises an inner cone pressing sleeve (2) and an inner cone shaft (3); the internally armored steel wire fixing device is fastened in the bearing nuts (4); the inner cone pressing sleeve (2) is fixedly connected with the support tray (10) through the bearing nuts (4); the inner barrel body (8) sleeves on the outside of the support tray (10), and is located by steel wire retainer rings (6) used for holes; the prefabricated barrel (9) also sleeves on the inner barrel body (8), and the portion from the deep-sea optical cable to the prefabricated barrel (9) is coated with an injection molding film; the support tray (10) is also provided with a tray and a cover plate (12); fiber storage units are arranged on the upper lower end and the lower end of the tray. The deep-sea optical cable extrusion molding branch joint box adds the functions, lowers the cost and simplifies the structures. The deep-sea optical cable extrusion molding branch joint box is easy to manufacture, low in fault rate, and has the advantages of being safe, reliable, energy-saving, environment-friendly, convenient to operate.

Description

Deep sea optical cable extruded branch connector box and installation process thereof

Technical field

The deep sea optical cable extruded branch connector box and the installation process thereof relate to a deep sea optical cable branch connection, which is suitable for one-to-two-out connection in a deep sea optical cable communication system.

Background technique

The shallow sea submarine cable joint box is sealed by mechanical seal structure. It can not guarantee the long-term reliability of the sealing performance and can only withstand 2000m water pressure. It is suitable for the branch connection of shallow sea cable. Now the structure of deep sea cable is different from shallow sea cable. There are also deep sea optical cables suitable for 5000m water depth, sealing performance requirements and reliability requirements are higher, so the original submarine cable branch connector box can not meet the branch connection of deep sea optical cable, therefore, deep sea optical cable extruded branch connector box is needed to complete deep sea optical cable. Branch connection.

Summary of the invention

OBJECT OF THE INVENTION: The object of the present invention is to provide a device and method for a deep sea optical cable branch joint provided for a deficiency of a shallow sea submarine cable joint box, which has a small volume, a simple structure, a higher sealing performance, and is more reliable.

Technical Solution: A deep sea optical cable extruded branch joint box according to the present invention comprises an inner twisted wire fixing device, a bearing nut, a support tray, an inner cylinder body, a prefabricated cylinder and an injection molded sealing body, and the support tray is provided at two ends There is a gasket and a bearing nut, the inner wire fixing device comprises an inner cone pressing sleeve and an inner cone shaft, the inner cymbal wire fixing device is fastened in the bearing nut, and the inner cone pressing sleeve passes through the bearing nut The support tray is fixedly connected to the support tray; the support tray is sleeved with an inner cylinder body, and is positioned by a wire retaining ring, the inner cylinder body is also covered with a prefabricated cylinder, and the deep sea optical cable is coated with the injection mold to the prefabricated cylinder. And a tray and a cover plate are further disposed on the support tray, and a fiber storage unit is disposed at upper and lower ends of the tray.

As an optimization, an O-ring is further disposed between the support tray and the inner cylinder.

Preferably, the preformed cylinder is a polyethylene preform cylinder.

As an optimization, an optical fiber limit card is further disposed in the support tray.

As an optimization, the support tray is provided with a cable input interface and two cable output interfaces.

The invention also discloses a installation process of a deep sea cable extruded branch joint box, comprising the following steps:

(1) Assembling the support tray: Install the hexagon socket screw on the end of the clamped inner armor, leave the stainless steel tube, insert the fiber guide sleeve on the stainless steel tube, protect the fiber, and keep the fiber; keep the support tray. Embedding a sealing gasket in the inner armor bearing nut, and respectively mounting the inner bearing nut and the supporting tray, and installing a fiber limiting card in the supporting tray, the optical fiber is wound in the ring and protected;

(2) Welding and coating of the optical fiber: the optical fiber is taken out and cleaned, divided into two groups, which are welded in sequence, and then welded while being welded. After the OTDR inspection, the cover is closed and the fixing screws are connected;

(3) Install an O-ring on the support tray, put the inner cylinder on the support tray, and fix the hole with a wire retaining ring, and finally put the pre-formed sleeve on the inner cylinder;

(4) Open the upper and lower molds of the injection molding, scrub them clean, put the pre-made cylinder into the mold cavity, then lock the upper and lower molds, connect the cooling water device, connect the cooling water circuit, the heater control circuit, and start the mold. Heating, setting the heating temperature; setting the cold However, the water temperature of the water tank, when the mold is heated to the set temperature, is kept warm, the high-density polyethylene pellets are placed in the hopper, the extruder is screwed, the heating power of the extrusion split mold is turned on, and the heating temperature of each zone is reached. , heat preservation, cooling the hopper while heating;

(5) After the extrusion plasticization is normal, the extruder is connected with the injection mold, the cooling water at both ends of the mold is started, and the injection molding machine is started to inject polyethylene into the cavity until the plastic flows out from the overflow port, and the material flows out. After that, the overflow port is closed and pressurized, and the heater of the injection mold is closed while maintaining the pressure;

(6) Fully cool the mold: cool the mold, loosen the mold clamping screw, open the mold with the mold opening screw, cut the umbilical cord of the mold and the injection molding machine, and urinate the overflow port; Take out the tube, take care not to hurt the injection surface, put the injection molded body into the X-ray flaw detector, and check the defects of the injection molding. If there is no problem, complete the installation of the extruded branch box.

Advantageous Effects: The present invention overcomes the shortcomings in the prior art, increases functions, reduces cost, simplifies structure, and has the advantages of easy manufacture, low failure rate, safety and reliability, energy saving and environmental protection, and easy operation.

DRAWINGS

Figure 1 is a schematic view of the mounting structure of the present invention.

detailed description

As shown in FIG. 1 , a deep sea cable extruded branch joint box comprises an inner wire fixing device, a bearing nut 4 , a supporting tray 10 , an inner cylinder 8 , a prefabricated cylinder 9 and an injection molded sealing body 1 , and a supporting tray 10 The end is provided with a sealing ring 5 and a bearing nut 4, and the inner cymbal wire fixing device comprises an inner cone pressing sleeve 2 and an inner cone shaft 3, the inner cymbal wire fixing device is fastened in the bearing nut 4, and the inner cone pressing sleeve 2 passes through the bearing The force nut 4 and the support tray 10 are fixedly connected; the support tray 10 is sleeved with an inner cylinder 8 and is positioned by a wire retaining ring 6 for the hole, and the inner cylinder 8 is also covered with a prefabricated cylinder 9 and is molded by injection molding. The deep sea cable is covered to the prefabricated cylinder 9; the support tray 10 is further provided with a tray and a cover 12, and the fiber storage unit is disposed at the upper and lower ends of the tray.

The inner inner wire fixing device is connected: the steel wire is connected by a crimping machine to the inner cone pressing sleeve 2 and the inner cone shaft 3 and the inner cable of the submarine cable. The support tray 10 is connected to the inner wire fixing device: the sealing ring 5 is sleeved on the inner wire fixing device, and the bearing nut 4 is connected to the supporting tray 10 on the inner wire fixing device. The support tray 10 is connected to the inner optical fiber: the optical fiber limit card 11 is fixed on the support tray 10, the optical fiber is welded and then wound in the support tray 10, and the cover 12 is connected to the support tray 10. The support tray 10 is connected to the inner cylinder 8: the O-ring 7 is mounted on the support tray 10, the inner cylinder 8 is sleeved on the support tray 10, and then the hole is attached to the inner cylinder 8 by the wire retaining ring 6, The inner cylinder 8 and the support tray 10 are positioned. The PE prefabricated cylinder 9 is sleeved on the inner cylinder body 8, and then the assembly body is installed in the extrusion mold to perform an extrusion operation, and the injection molding sealing body 1 is formed after the extrusion molding, so that the injection molding sealing body 1 is a deep sea optical cable and The joint is integrally sealed.

The deep sea cable extruded branch joint box of the invention has the structure of one-in and two-out, and in use, the inner sheaths of the deep-sea cables at both ends are stripped and fixed, and the inner twisted steel wires are separated according to the original stranding sequence. And cleaned, leaving copper tube. Clean the stainless steel pipe, cut all the excess inner wire, cut the inner cone shaft into the stainless steel pipe core, and then put it in the crimping device and clamp it twice.

The installation process of the deep sea optical cable extruded branch joint box of the invention is:

Support tray assembly: Install the hexagon socket screw on the end of the clamped inner armor, leave the stainless steel tube, insert the fiber guide sleeve on the stainless steel tube, protect the fiber, and keep the fiber; keep the support tray inside. The sealing nut is embedded in the bearing nut, and the inner bearing arm and the supporting tray are respectively installed. A fiber-optic limit card is installed in the support tray, and the fiber is wound around the ring and protected.

Welding and coating of optical fiber: The optical fiber is taken out and cleaned, divided into two groups, which are welded in turn, coated while being welded. After inspection by OTDR, cover the cover and connect the fixing screws.

After the support tray is fitted with the O-ring, the inner cylinder is placed on the support tray, and the hole is fixed by the wire retaining ring. Finally, the PE pre-formed sleeve is placed on the inner cylinder.

Open the upper and lower molds of the injection molding, scrub them clean, put the PE pre-made cylinder into the mold cavity, then lock the upper and lower molds, connect the cooling water device, connect the cooling water circuit, the heater control circuit, and start heating the mold. Set the heating temperature. Set the water temperature of the cooling water tank and keep it warm after the mold is heated to the set temperature. The high-density polyethylene pellets are placed in a hopper, the extruder is screwed, and the heating power of the extrusion split mold is turned on. After the heating temperature of each zone is reached, the heat is maintained, and the hopper is cooled while being heated.

After the extrusion plasticization is normal, the extruder is connected with the injection mold, the cooling water at both ends of the mold is started, and the injection molding machine is started to inject polyethylene into the cavity until the plastic flows out from the overflow port. The overflow port is closed, pressurized, and the heater of the injection mold is closed while maintaining pressure.

The mold is sufficiently cooled, the mold is cooled, the mold clamping screw is loosened, the mold is opened by the mold opening screw, and the umbilical cord of the mold and the injection molding machine and the umbilical cord of the overflow opening are cut. Take out the sealed sealed fiber winding tube, taking care not to scratch the injection surface. The injection molded body is placed in an X-ray flaw detector to check the defects of the injection molding, and if there is no problem, the installation of the extruded branch box is completed.

Claims

A deep sea cable extruded branch joint box, comprising an inner wire fixing device, a bearing nut (4), a supporting tray (10), an inner cylinder (8), a prefabricated cylinder (9) and an injection molded sealing body (1), The utility model is characterized in that: the support tray (10) is provided with a gasket (5) and a bearing nut (4) at both ends, and the inner wire fixing device comprises an inner cone pressing sleeve (2) and an inner cone shaft (3) The inner wire fixing device is fastened in the bearing nut (4), and the inner cone pressing sleeve (2) is fixedly connected by the bearing nut (4) and the supporting tray (10); the supporting tray (10) The outer sleeve (8) is sleeved on the outside, and the hole is fixed by a wire retaining ring (6). The inner cylinder (8) is also covered with a prefabricated cylinder (9), and the deep sea optical cable is covered with an injection mold. A portion of the prefabricated cylinder (9); a tray and a cover plate (12) are further disposed on the support tray (10), and a fiber storage unit is disposed at upper and lower ends of the tray.
A deep sea cable extruded branch joint box according to claim 1, characterized in that an O-ring (7) is further disposed between the support tray (10) and the inner cylinder (8).
A deep sea cable extruded branch joint box according to claim 1, characterized in that the prefabricated cylinder (9) is a polyethylene prefabricated cylinder.
The deep sea cable extruded branch joint box according to claim 1, characterized in that: the support tray (10) is further provided with a fiber limit card (11).
The deep sea cable extruded branch joint box according to claim 1, wherein the support tray (10) is provided with a cable input interface and two cable output interfaces.
The invention relates to a process for installing a deep sea cable extruded branch joint box, which comprises the following steps:

(1) Assembling the support tray: Install the hexagon socket screw on the end of the clamped inner armor, leave the stainless steel tube, insert the fiber guide sleeve on the stainless steel tube, protect the fiber, and keep the fiber; keep the support tray. Embedding a sealing gasket in the inner armor bearing nut, and respectively mounting the inner bearing nut and the supporting tray, and installing a fiber limiting card in the supporting tray, the optical fiber is wound in the ring and protected;

(2) Welding and coating of the optical fiber: the optical fiber is taken out and cleaned, divided into two groups, which are welded in sequence, and then welded while being welded. After the OTDR inspection, the cover is closed and the fixing screws are connected;

(3) Install an O-ring on the support tray, put the inner cylinder on the support tray, and fix the hole with a wire retaining ring, and finally put the pre-formed sleeve on the inner cylinder;

(4) Open the upper and lower molds of the injection molding, scrub them clean, put the pre-made cylinder into the mold cavity, then lock the upper and lower molds, connect the cooling water device, connect the cooling water circuit, the heater control circuit, and start the mold. Heating, setting the heating temperature; setting the water temperature of the cooling water tank, after the mold is heated to the set temperature, keeping warm, placing the high-density polyethylene pellets into the hopper, screwing the extruder, and heating the extrusion split mold The power is turned on, and after the heating temperature of each zone is reached, the heat is kept, and the hopper is cooled while being heated;

(5) After the extrusion plasticization is normal, the extruder is connected with the injection mold, the cooling water at both ends of the mold is started, and the injection molding machine is started to inject polyethylene into the cavity until the plastic flows out from the overflow port, and the material flows out. After that, the overflow port is closed and pressurized, and the heater of the injection mold is closed while maintaining the pressure;

(6) Fully cool the mold: cool the mold, loosen the mold clamping screw, open the mold with the mold opening screw, cut the umbilical cord of the mold and the injection molding machine, and urinate the overflow port; Take out the tube, take care not to hurt the injection surface, put the injection molded body into the X-ray flaw detector, and check the defects of the injection molding. If there is no problem, complete the installation of the extruded branch box.