CN113824503B

CN113824503B - Internal unit of relay amplifier and tensioning method

Info

Publication number: CN113824503B
Application number: CN202111398029.6A
Authority: CN
Inventors: 翟继涛; 许昌武; 晁红颍; 郝利军
Original assignee: Huahai Communication Technology Co ltd
Current assignee: Huahai Communication Technology Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-02-25
Anticipated expiration: 2041-11-24
Also published as: CN113824503A

Abstract

The application provides an interior unit and tight method that rises of relay amplifier, through the integrated level that improves the photoelectric drive unit, and through rationally distributed photoelectric drive unit and surge protection unit, can effectively reduce the space that the photoelectric drive unit was shared in optical device dish fiber box group circumference, and reduce the space that surge protection unit took in the cavity, thereby can provide more arrangeable space for optical device dish fiber box group, and then can enlarge every optical device dish fiber box's volume in the optical device dish fiber box group, with the optical device who holds more optical fiber pairs. Meanwhile, the tensioning mechanism and the tensioning spring are simple in structure, and cannot occupy the space of the optical device fiber coiling box group in the cavity, so that a structural foundation can be provided for increasing the volume of the optical device fiber coiling box group.

Description

Internal unit of relay amplifier and tensioning method

Technical Field

The application relates to the technical field of submarine communication, in particular to an internal unit of a relay amplifier and a tensioning method.

Background

Submarine cables (undersea cables) are cables laid on the seabed and are used for transmitting optical signals on the seabed. Fig. 1 provides a schematic structural diagram of an existing submarine optical cable communication system, as shown in fig. 1, signals are transmitted between an existing first landing station machine room 100, an existing second landing station machine room 200, and an existing third landing station machine room 300 on a shore through a submarine cable, wherein the signals output by the existing first landing station machine room 100 are divided into two paths of signals by an existing splitter 400 to be transmitted to the existing second landing station machine room 200 and the existing third landing station machine room 300, respectively. Due to the long submarine communication distance, optical power attenuation can occur in the transmission process of optical signals. In order to ensure the transmission quality of the optical signals, a relay amplifier needs to be arranged on a submarine cable at a certain distance to amplify the optical signals, and as shown in fig. 1, a plurality of existing relay amplifiers 500 are arranged among the existing first landing station machine room 100, the existing second landing station machine room 200, and the existing third landing station machine room 300 to ensure the long-distance transmission of the optical signals among the landing station machine rooms.

As shown in fig. 2, the conventional optical amplifying unit mainly includes a pressure-bearing cylinder 1, an insulating cylinder 2 built in the pressure-bearing cylinder 1, an internal unit 3 built in the insulating cylinder 2, and end caps 4 disposed at two ends of the pressure-bearing cylinder 1, where the internal unit 3 includes a plurality of optoelectronic devices, such as an optical path unit, a circuit unit, a surge protection unit, an optical device fiber coiling box, and the like, and is configured to implement functions of transmitting and amplifying optical signals. As shown in fig. 3, which is a schematic view of a radial cross section of a prior art inner unit, the inner unit comprises a prior art first housing 1001 and a prior art second housing 1002 that can be combined into one chamber, at least two existing optical device fiber boxes 1003 and an existing optical path unit 1004 corresponding to the existing optical device fiber boxes 1003, an existing circuit unit 1005, and an existing surge protection unit 1006 are arranged in the existing first housing 1001 and the existing second housing 1002, wherein, as shown in fig. 3, the existing optical path unit 1004, the existing circuit unit 1005 and the existing surge protection unit 1006 corresponding to each existing optical device fiber box 1003 form a three-layer ladder structure, this three-layer stair structure sets up in one side of corresponding fine box 1003 of present optical device dish, and two three-layer stair structure that present optical device dish fine box 1003 corresponds about and set up respectively in two relative both sides of present optical device dish fine box 1003. As shown in fig. 3, an existing tensioning mechanism 1007 is disposed between the existing first housing 1001 and the existing second housing 1002, and in order to cooperate with the assembly of the existing tensioning mechanism 1007, a hinge is further required to be disposed at one end of a cavity formed by the existing first housing 1001 and the existing second housing 1002, so as to achieve tensioning and fixing between the internal unit and the external device.

As can be seen, in the structure of the internal unit of the conventional repeater amplifier, on the basis that the size of the cavity formed by the conventional first housing 1001 and the conventional second housing 1002 is not changed, because the three-layer ladder structure formed by the conventional optical path unit 1004, the conventional circuit unit 1005 and the conventional surge protection unit 1006 occupies the space of the cavity in the y direction (as shown in fig. 3), and because the conventional tensioning mechanism 1007 has a certain width, the conventional tensioning mechanism 1007 occupies the space of the cavity in the x direction (as shown in fig. 3), so as to compress the space occupied by the conventional optical device fiber box 1003, and the smaller the conventional optical device fiber box 1003 is, the smaller the number of optical devices that can be accommodated therein is, for example, the number of optical devices that can only accommodate 2 fiber pairs in one conventional optical device fiber box 1003 is smaller, and the number of supported fibers is smaller.

Disclosure of Invention

The application provides an interior unit and tight method that rises of repeater, can effectively improve the volume of optical device dish fine box on the unchangeable basis of the external dimension of interior unit to increase the quantity of the optical device that optical device dish fine box can hold, with the support more fine pairs of arranging.

In a first aspect, the present application provides an internal unit of a relay amplifier, comprising: a cavity formed by the first housing and the second housing;

at least one optical device fiber tray set is arranged in the cavity and comprises a first optical device fiber tray and a second optical device fiber tray, wherein the first optical device fiber tray and the second optical device fiber tray are symmetrically arranged, and a first surface of the first optical device fiber tray is adjacent to a second surface of the second optical device fiber tray;

the vertex of the radial section of the optical device fiber disc box group is contacted with the inner wall of the cavity;

a photoelectric driving unit is respectively arranged in four circumferential gaps between the optical device disc fiber box group and the cavity, wherein a laser is integrated on the photoelectric driving unit, two adjacent photoelectric driving units in the four photoelectric driving units around the optical device disc fiber box group are connected with the first optical device disc fiber box, and the other two adjacent photoelectric driving units are connected with the second optical device disc fiber box;

a surge protection unit is arranged at one end of the cavity and is electrically connected with each photoelectric driving unit in the cavity;

two ends of the cavity are respectively provided with a tensioning mechanism which is coaxial with the cavity;

and a tension spring is arranged at the joint of the first shell and the second shell in the cavity and between the two adjacent optical device disc fiber box groups.

Through the integrated level that improves the photoelectric drive unit, can effectively reduce the photoelectric drive unit and organize the shared space of circumference at optical device dish fiber box, through setting up surge protection unit in the tip of cavity to reduce the space that surge protection unit took in the cavity, thereby can provide more arrangment space for optical device dish fiber box group, and then can enlarge every optical device dish fiber box's in the optical device dish fiber box group volume, with the optical device that holds more optical fiber pairs. Meanwhile, the tensioning mechanism and the tensioning spring are simple in structure, and cannot occupy the space of the optical device fiber coiling box group in the cavity, so that a structural foundation can be provided for increasing the volume of the optical device fiber coiling box group.

In one implementation, the radial cross-section of the set of optical device discs is square.

According to the geometrical relation, the optical device fiber box group with the square radial section is adopted, so that the volume of the optical device fiber box group can be maximized, and more optical devices can be accommodated.

In one implementation, the optoelectronic driving unit is disposed on an inner wall of the first housing or the second housing, and a long axis of the optoelectronic driving unit is parallel to an axis of the cavity.

The corresponding relation between the photoelectric driving unit and the optical device fiber coiling box can be ensured, the photoelectric driving unit can be arranged in enough size, overlapping between two circumferentially adjacent photoelectric driving units can not be caused, and the photoelectric driving unit can not additionally occupy the space in the cavity.

In one implementation, a heat dissipation material is filled between the photoelectric driving unit and the first housing or the second housing.

On one hand, the heat dissipation efficiency can be improved through the heat dissipation material, and on the other hand, the air gap can be eliminated through the heat dissipation material, so that the obstruction of the air gap to heat dissipation is reduced.

In one implementation, the axis of the laser and the minor axis of the electro-optical drive unit have an included angle therebetween.

More lasers can be arranged on the circuit board with the same area.

In one implementation, the first housing and the second housing are made of materials with thermal conductivity higher than a threshold value; the photoelectric driving unit comprises a circuit board, an electric device and the laser, wherein the electric device and the laser are integrated on the circuit board, a through hole is formed in a first position of the circuit board, which corresponds to the laser, and the size of the through hole is matched with that of the laser; the first shell and the second shell are provided with bosses on a second position corresponding to the first position, the bosses are attached to the bottom surface of the laser in the first position, and heat-conducting media are filled at the attachment positions of the bosses and the laser.

On the one hand, can be through heat-conducting medium connection laser instrument and boss to improve the radiating efficiency, on the other hand, can eliminate the air gap through heat-conducting medium, with the hindrance of reduction air gap to the heat dissipation.

In one implementation, the tensioning mechanism comprises a tensioning ring and a tensioning screw;

the periphery of the tensioning ring and the positions corresponding to the first shell and the second shell are respectively provided with a screw hole, the inner walls of the first shell and the second shell and the positions corresponding to the screw holes are provided with a matching screw hole, and the corresponding screw holes and the matching screw holes are connected through the tensioning screws.

Splicing and fixing between the first shell and the second shell can be realized through a simple tensioning mechanism.

In one implementation mode, an axial distance exists between two adjacent optical device disc fiber box groups, the axial distance is N, the tension spring is arranged at the axial distance, and the diameter of the tension spring is smaller than N.

The tension springs are located in the cavity and cannot occupy the space in the thickness direction of the cavity, and the tension springs are located at intervals among the optical device fiber box groups and cannot encroach on the space of the optical device fiber box groups in the axial direction of the cavity.

In one implementation, an external device is disposed in the cavity, wherein when the first housing and the second housing are attached to each other, a radial distance between the first housing and the external device is a, a radial distance between the second housing and the external device is b, and a rebound distance of the tension spring is c, where a + b < c.

The resilience distance can ensure that the tension spring has enough resilience distance so as to ensure that the first shell and the second shell are tightly attached to the insulating cylinder body.

In a second aspect, the present application further provides a method for tensioning an internal unit of a relay amplifier, which is applied to the internal unit of the relay amplifier in the first aspect, and includes:

splicing the first shell and the second shell together through the tensioning mechanism to form the cavity, wherein the tensioning spring is in a compressed state;

placing the cavity into an external device, wherein the radial distance between the first shell and the external device is a, and the radial distance between the second shell and the external device is b;

and loosening the tensioning mechanism to enable the tensioning spring to generate resilience, wherein the resilience distance of the tensioning spring is c, and a + b is less than c, so that the first shell and the second shell are attached to the external device.

Therefore, the first shell and the second shell can be tightly attached to the insulating cylinder body in a tightening way in the tightening process, the effects of fixing and eliminating air gaps are achieved, and the internal units are relatively stable in the insulating cylinder body and can radiate well.

By the above, this application provides an interior unit and tight method that rises of repeater, through the integrated level that improves the photoelectric drive unit, and through rationally distributed photoelectric drive unit and surge protection unit, can effectively reduce the space that the photoelectric drive unit was shared in optical device dish fiber box group circumference, and reduce the space that surge protection unit took in the cavity, thereby can provide more arrangeable space for optical device dish fiber box group, and then can enlarge every optical device dish fiber box's in the optical device dish fiber box group volume, with the optical device that holds more optical fiber pairs. Meanwhile, the tensioning mechanism and the tensioning spring are simple in structure, and cannot occupy the space of the optical device fiber coiling box group in the cavity, so that a structural foundation can be provided for increasing the volume of the optical device fiber coiling box group.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.

FIG. 1 is a schematic diagram of a prior art submarine fiber optic cable communication system;

FIG. 2 is a schematic diagram of a conventional optical amplifying unit;

FIG. 3 is a schematic radial cross-section of a prior art inner unit;

fig. 4 is an external structural diagram of an internal unit of a relay amplifier according to an embodiment of the present disclosure;

fig. 5 is a schematic internal structural diagram of a first housing and components arranged thereon according to an embodiment of the present application;

FIG. 6 is a schematic radial cross-sectional view of a cavity at an array of optical device driver bays according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of an electro-optical driving unit according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a second optical device fiber coiling box provided in an embodiment of the present application;

fig. 9 is a schematic structural view of a first bait fiber disc provided in an embodiment of the present application;

fig. 10 is a schematic structural diagram of a first optical device mounting box provided in an embodiment of the present application;

fig. 11 is a schematic radial cross-sectional view of a cavity at a tensioning mechanism according to an embodiment of the present disclosure.

Description of the drawings

100-existing first landing station machine room, 200-existing second landing station machine room, 300-existing third landing station machine room, 400-existing splitter, 500-existing repeater amplifier, 1001-existing first housing, 1002-existing second housing, 1003-existing optical device fiber reel box, 1004-existing optical path unit, 1005-existing circuit unit, 1006-existing surge protection unit, 1007-existing tensioning mechanism, 1-pressure-bearing cylinder, 2-insulating cylinder, 3-internal unit, 4-sealing end cover, 10-first housing, 20-second housing, 30-cavity, 40-optical device fiber reel box group, 401-first optical device fiber reel box, 402-second optical device fiber reel box, 4021-first cover plate, 4022-second cover plate, 4023-a first bait fiber disc, 40231-a bait fiber baffle, 4024-a first optical device mounting box, 40241-an optical device baffle, 40242-a fiber running baffle, 4025-a first optical device, 4026-a second bait fiber disc, 4027-a second optical device mounting box, 4028-a second optical device, 403-a first surface, 404-a second surface, 405-a photoelectric driving unit, 4051-a circuit board, 4052-an electric device, 406-a laser, 50-a surge protection unit, 60-a tensioning mechanism, 601-a tensioning ring, 6011-a screw hole, 2-a matching screw hole, 602-a screw and 70-a tensioning spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The optical device fiber coiling box of the internal unit (hereinafter referred to as the internal unit) of the relay amplifier is used for accommodating optical devices, and the number of the optical devices corresponds to the number of fiber pairs, namely, the greater the number of the fiber pairs, the greater the total number of the corresponding optical devices. In order to support more fiber pairs, the number of optical devices that can be accommodated in the optical device fiber box needs to be increased, which also needs to increase the volume of the optical device fiber box. As can be seen from fig. 2, the inner unit is a component of the light amplification unit, and the pressure-bearing cylinder 1 and the insulating cylinder 2 of the light amplification unit may be collectively referred to as an outer device of the inner unit. Since the two sides of the optical amplifying unit are respectively connected with other components to form the relay amplifier, the joints of the components are required to meet a certain joint size, that is, the radial cross-sectional size is relatively fixed, and correspondingly, the radial cross-sectional size of the internal unit located inside the optical amplifying unit is also relatively fixed. Therefore, assuming that the axial dimension of the optical device fiber box along the internal unit is fixed, it is necessary to increase the radial dimension of the optical device fiber box in the internal unit as much as possible to enlarge the volume of the optical device fiber box.

Fig. 4 is an external structural schematic diagram of an internal unit of a relay amplifier according to an embodiment of the present application, where as shown in fig. 4, the internal unit includes: the first housing 10 and the second housing 20, and the first housing 10 and the second housing 20 may be spliced to form the cavity 30. The first housing 10 and the second housing 20 may be made of a material having high strength, good corrosion resistance, light weight, and excellent thermal conductivity, for example, an aluminum alloy material. In this way, the cavity 30 formed by the first and

second housings

10 and 20 can resist damage from an external force due to its high strength during transportation, assembly, and installation, thereby protecting the various components inside, improving the safety of the internal unit, and extending the lifespan of the internal unit. The chamber 30, once in contact with corrosive seawater during assembly and subsequent use, has good corrosion resistance, and can effectively resist the corrosion of seawater, thereby protecting the internal components. Also, since the overall mass of the chamber 30 is light, it can be easily transported and assembled. Simultaneously, each inside part of cavity 30 can produce the consumption at the in-process of work, outwards gives off a large amount of heats, if the temperature of part is too high, then can influence the working property, and cavity 30 has good heat dispersion, can distribute away the heat that inside part produced more fast to the temperature of guaranteeing each part can not be too high, thereby guarantees the working property of each part.

Fig. 5 is a schematic diagram of an internal structure of the first housing and components disposed thereon according to an embodiment of the present application, and reference may be made to fig. 5 for an internal structure of the second housing 20 and components disposed thereon, where the first housing 10 and components disposed thereon correspond to the second housing 20 and components disposed thereon. As shown in fig. 5, at least one optical device fiber tray group 40 (a first optical device fiber tray 401 in each optical device fiber tray group 40 is shown in fig. 5) may be disposed in the cavity 30 according to the requirement of the fiber pair, and each optical device fiber tray group 40 is arranged along the axial direction of the cavity 30. Illustratively, if a smaller number of fiber pairs is desired, a smaller number of optical device puck groupings 40 can be arranged and the axial length of the cavity 30 can be adaptively shortened; if a greater number of fiber pairs is desired, a lesser number of optical device disk fiber box sets 40 can be arranged and the axial length of the cavity 30 can be adaptively extended. Fig. 5 illustrates an example in which 4 optical device fiber cartridge groups 40 are arranged, and since one first optical device fiber cartridge 401 corresponds to one optical device fiber cartridge group 40, it can be seen from the arrangement of the first optical device fiber cartridge 401 shown in fig. 5 that the 4 optical device fiber cartridge groups 40 are arranged in order along the axial direction of the cavity 30.

In fig. 6, one optical device disk cartridge group 40 and corresponding parts in the internal units will be described in an enlarged manner, and as shown in fig. 6, the optical device disk cartridge group 40 includes a first optical device disk cartridge 401 and a second optical device disk cartridge 402. The first optical device fiber cartridge 401 and the second optical device fiber cartridge 402 are symmetrically disposed, and a first surface 403 of the first optical device fiber cartridge 401 is adjacent to a second surface 404 of the second optical device fiber cartridge 402. In order to fully utilize the space in the cavity 30, the optical device fiber box assembly 40 can be in maximum contact with the cavity 30, fig. 6 is a schematic view of a radial cross section of an internal unit at the optical device fiber box assembly 40, as shown in fig. 6, the vertex of the radial cross section of the optical device fiber box assembly 40 can be in contact with the inner wall of the cavity 30, at this time, four vertices of the radial cross section of the optical device fiber box assembly 40 are in contact with the edge of the radial cross section of the cavity 30, and the maximum contact between the optical device fiber box assembly 40 and the cavity 30 is already realized. In some embodiments, the radial cross-section of the optical device disk enclosure group 40 can be designed to have a shape and size according to actual needs, and the radial cross-section of the optical device disk enclosure group 40 is generally designed to be rectangular for easy production and arrangement of internal optical fibers, optical devices, and the like. Further, if the radial cross section of the optical device fiber storage box group 40 is rectangular, and is located in a quadrangle inside a circle according to the geometric relationship, and the area of the square is the largest, in order to make the optical device fiber storage box capable of accommodating more optical devices, the radial cross section of the optical device fiber storage box group 40 may be designed to be square.

As shown in fig. 6, there are four circumferential slits between the optical device disk fiber box group 40 and the cavity 30, one photoelectric driving unit 405 is disposed in each circumferential slit, and the first optical device disk fiber box 401 and the second optical device disk fiber box 402 provide the optical electrical signals through the corresponding photoelectric driving units 405, for example, referring to fig. 6, the first optical device disk fiber box 401 is connected with two photoelectric driving units 405 located below and to the left thereof, and the two photoelectric driving units 405 provide the optical electrical signals; the second optical device disk cartridge 402 is connected to two photoelectric driving units 405 located at right and upper sides thereof, and an optical electric signal is supplied from the two photoelectric driving units 405. The connection between the optical driving unit 405 and the optical device fiber cartridge can be realized through a flexible circuit board. It can be seen that the optical disc fiber box assembly 40 is distributed with the photoelectric driving units 405, and since the space occupied by each photoelectric driving unit 405 is equal, the arrangement can provide a space basis for the radial cross section design of the optical disc fiber box assembly 40 to be a square.

In some embodiments, the optical disk enclosure group 40 may be provided with the optical driving units 405 only in at least two of the four circumferential slits, and the number of the optical driving units 405 only needs to match the amount of the optical signals required by the optical disk enclosure group 40.

The electro-optical driving unit 405 is essentially an integrated circuit board, and typically, the electro-optical driving unit 405 is fixed to the inner walls of the first housing 10 and the second housing 20, for example, by screws, so as to be easily removed and replaced. The side of the photoelectric driving unit 405 having a large area and not provided with the photoelectric device is in contact with the inner wall of the first housing 10 or the second housing 20, and the long axis of the photoelectric driving unit 405 (the side having a long length in the side having the large area of the photoelectric driving unit 405) is parallel to the axis of the cavity 30. In some embodiments, a heat dissipation material is filled between the electro-optical driving unit 405 and the first housing 10 and the second housing 20, so that on one hand, the heat dissipation efficiency can be improved by the heat dissipation material, and on the other hand, the air gap can be eliminated by the heat dissipation material, so as to reduce the obstruction of the air gap to heat dissipation.

The thickness of the electro-optical driving unit 405 along the radial direction of the cavity 30 directly affects the space occupied by the electro-optical driving unit 405 in the cavity 30. In order to reduce the space occupied by the electro-optical driving unit 405 in the cavity 30, the thickness of the electro-optical driving unit 405 along the radial direction of the cavity 30 may be reduced. The optical-electrical driving unit 405 is used to provide optical signals and electrical signals, and thus, the optical-electrical driving unit 405 includes a component for providing electrical signals and a component for providing optical signals, so as to reduce the thickness of the optical-electrical driving unit 405 along the radial direction of the cavity 30, the number of circuit boards included in the optical-electrical driving unit 405 can be reduced, and multiple circuit boards are prevented from being stacked along the radial direction of the cavity 30. Thus, the means for providing an electrical signal and the means for providing an optical signal may be integrated on the same circuit board, i.e. the laser 406 for providing an optical signal and the means for providing an electrical signal may be integrated on the same circuit board.

The structure of the electro-optical driving unit 405 can refer to fig. 7, and as shown in fig. 7, the electro-optical driving unit 405 includes a circuit board 4051, an electric device 4052, and a laser 406. The circuit board 4051 may be one block, and may be formed by axially splicing a plurality of blocks along the cavity 30, the electrical device 4052 may be a voltage regulator tube, the electrical device 4052 may be a plurality of, and the laser 406 may be a plurality of.

In some embodiments, the lasers 406 may be placed side-by-side and obliquely on the circuit board 4051, i.e., the axis of the laser 406 forms an angle with the minor axis of the electro-optical driving unit 405 (the side with smaller length on the side with larger area of the electro-optical driving unit 405), so that more lasers 406 can be placed on the same area of the circuit board 4051.

In some embodiments, the location of the circuit board 4051 corresponding to the laser 406 is referred to as a first location, and a through hole is formed in the first location, and the size of the through hole needs to be adapted to the size of the corresponding laser 406, so that the laser 406 can be contacted with the inner wall of the first housing 10 or the second housing 20 behind the circuit board 4051 through the through hole. Accordingly, a position of the first and

second housings

10 and 20 corresponding to the first position may be referred to as a second position in which a boss is provided so that the first and

second housings

10 and 20 are in contact with the corresponding laser 406 through the boss. The bosses may be integrally formed with the first and

second housings

10 and 20, or may be separate structures that are internally connected to the first and

second housings

10 and 20, and are fixed to the second positions of the first and

second housings

10 and 20 by welding, riveting, or the like, for example. In general, the bosses may be made of the same material as the first and

second housings

10 and 20, or may be made of other materials having excellent heat dissipation performance. In some embodiments, in order to further improve the heat dissipation effect of the laser 406, a heat conducting medium may be filled between the laser 406 and the boss, on one hand, the laser 406 and the boss may be connected by the heat conducting medium to improve the heat dissipation efficiency, and on the other hand, the air gap may be eliminated by the heat conducting medium to reduce the obstruction of the air gap to the heat dissipation.

In addition, the photo-driving units 405 generally need to be matched with the surge protection unit 50, so as to protect each photo-driving unit 405 from being damaged by the spike current or voltage suddenly generated from the outside through the surge protection unit 50. In order to reduce the space occupied by the surge protection unit 50 in the cavity 30, as shown in fig. 5, the surge protection unit 50 may be disposed at one end of the cavity 30, and electrically connected to each of the optical driving units 405 through the surge protection unit 50, so as to protect the optical driving units 405 from the external. With the structure shown in fig. 5, the surge protection unit 50 does not encroach on the radial space of any optical device fiber reel block 40 in the cavity 30, and since the surge protection unit 50 is essentially a circuit board with a surge protection function, the thickness thereof is small, and even if the surge protection unit is arranged at one end of the cavity 30, the space (the thickness of the surge protection unit 50) occupied by the surge protection unit in the axial direction of the cavity 30 is also small, and the volume of the optical device fiber reel block 40 is hardly affected.

In some embodiments, the first optical device fiber cartridge 401 and the second optical device fiber cartridge 402 may adopt the structure shown in fig. 8, fig. 8 shows the structure of the second optical device fiber cartridge 402, and the following description takes the internal structure of the second optical device fiber cartridge 402 as an example: as shown in fig. 8, the second optical device cartridge 402 includes a first cover plate 4021, a second cover plate 4022, a first optical device mounting box 4023, a first optical device mounting box 4024, a first optical device 4025, a second optical device mounting box 4026, a second optical device mounting box 4027, and a second optical device 4028. The first cover plate 4021 covers one side of the first bait fiber plate 4023, the other side of the first bait fiber plate 4023 is arranged on one side of the first optical device mounting box 4024, the other side of the first optical device mounting box 4024 is adjacent to one side of the second optical device mounting box 4027, the first optical device mounting box 4024 and the second optical device mounting box 4027 can be separated by a partition plate, the other side of the second optical device mounting box 4027 is connected with one side of the second bait fiber plate 4026, and the other side of the second bait fiber plate 4026 is covered with the second cover plate 4022. A first optical device 4025 is arranged in the first optical device mounting case 4024, and a second optical device 4028 is arranged in the second optical device mounting case 4027.

Taking the structure of the first bait fiber disc 4023 as an example, as shown in fig. 9, a plurality of bait fiber shutters 40231 are arranged on the first bait fiber disc 4023, and the plurality of bait fiber shutters 40231 have various sizes for bait wrapping and distribution. The first cover plate 4021 may prevent the optical fibers from jumping out of the first bait disc 4023.

Taking the internal structure of the first optical device mounting box 4024 as an example, as shown in fig. 10, the first optical device mounting box 4024 includes a plurality of optical device shutters 40241 and a plurality of fiber routing shutters 40242, the optical device shutters 40241 may divide the inside of the first optical device mounting box 4024 in the height direction, for example, the first optical device mounting box 4024 may be divided into three layers in the height direction, and the first optical devices 4025 are respectively disposed between the corresponding layers. Walk fine baffle 40242 setting and the both sides of first optical device mounting box 4024 to guarantee that first optical device 4025's tail fiber coils in first optical device mounting box 4024, make things convenient for the optical fiber butt fusion.

The design can realize that a large number of optical fiber-to-optical devices are accommodated in the optical device disk fiber box group. The design of the first optical device optical fiber box 401 may refer to the design of the second optical device optical fiber box 402, which is not described herein. In this way, the internal structure of the optical device disc fiber box group can be reasonably arranged to support the arrangement of more fiber pairs, for example, 32 fiber pairs can be arranged.

Known by the structure of above-mentioned internal unit, integration through improving photoelectric drive unit 405, can effectively reduce photoelectric drive unit 405 at the shared space of optical device dish fiber box group 40 circumference, set up in the tip of cavity 30 through protecting unit 50 with the surge, in order to reduce the space that protecting unit 50 took in cavity 30 with the surge, thereby can provide more arrangeable space for optical device dish fiber box group 40, and then can enlarge the volume of every optical device dish fiber box in optical device dish fiber box group 40, in order to hold the optical device of more fibre pairs.

The assembly process of the internal unit may be divided into two parts, i.e., a process of assembling internal components of the internal unit, and a process of assembling the internal unit with an external device. The method comprises the following specific steps:

regarding the process of assembling the internal components of the internal unit, the structure provided in fig. 4 to 10 is taken as an example for description, the arrangement of the internal structure of the first housing 10 and the second housing 20 is respectively performed, and the arrangement of the first housing 10 is taken as an example for description. First, the internal arrangement of each optical device cartridge will be described, taking the second optical device cartridge 402 as an example, optical fibers are respectively wound in the first and

second bait cartridges

4023 and 4026, and the first optical device 4025 corresponding to the optical fibers in the first bait cartridge 4023 is arranged in the first optical device mounting cartridge 4024, and the second optical device 4028 corresponding to the optical fibers in the second bait cartridge 4026 is arranged in the second optical device mounting cartridge 4027. The first bait fiber tray 4023 is disposed on the first optical device mounting box 4024, and the first cover plate 4021 is covered on the first bait fiber tray 4023. A second bait fiber tray 4026 is arranged on the second optical device mounting box 4027, and a second cover plate 4022 is covered on the second bait fiber tray 4026. The first optical device mounting box 4024 and the second optical device mounting box 4027 are arranged to face each other and spaced by a spacer to complete the assembly of the second optical device fiber reel 402. Referring to the above procedure, the assembly of the first optical device disc cartridge 401 is completed.

Taking the example that 4 optical device disk fiber box groups 40 can be correspondingly arranged in the axial dimension of the first housing 10, two photoelectric driving units 405 are arranged on the inner wall of the first housing 10 at positions corresponding to each optical device disk fiber box group 40, and the two photoelectric driving units 405 can be arranged at 90 °. One optical device disk cartridge of the optical device disk cartridge group 40, for example, the first optical device disk cartridge 401 is arranged at a position corresponding to the photoelectric driving unit 405, and after the arrangement, 4 first optical device disk cartridges 401 are arranged along the axial direction of the first housing 10. The photo-electric driving unit 405 is electrically connected to the corresponding first optical device disk cartridge 401 to provide an optical electrical signal to the first optical device disk cartridge 401 through the photo-electric driving unit 405. Referring to the above process, the arrangement of the second housing 20 is completed.

The first housing 10 and the second housing 20 can be assembled by a tensioning mechanism 60, and referring to fig. 11, the tensioning mechanism 60 includes a tensioning ring 601 and a tensioning screw 602. The periphery of the tension ring 601 is provided with a screw hole 6011 (as shown in fig. 5), the screw hole 6011 corresponds to the first housing 10 and the second housing 20, a matching screw hole 6012 is provided in the first housing 10 and the second housing 20 at a position corresponding to the screw hole 6011, and when the first housing 10 and the second housing 20 are assembled, the tension ring 601 is first placed at one end of the first housing 10, so that the screw hole 6011 of the tension ring 601 corresponds to the matching screw hole 6012 of the first housing 10. The screw hole 6011 and the mating screw hole 6012 have the same thread size, and both provide a thread structure mating with the screw 602, and the screw 602 is screwed into the screw hole 6011 and the mating screw hole 6012 to complete the connection between the first housing 10 and the tension ring 601. In some embodiments, to improve the alignment effect, the outer diameter of the mating screw hole 6012 may be designed to match the inner diameter of the screw hole 6011. So that the mating screw hole 6012 can be inserted into the screw hole 6011 to form a relatively fixed structure, at this time, the mating screw hole 6012 provides a threaded structure that mates with the screw 602, and the screw 602 is screwed into the mating screw hole 6012 to complete the connection between the first housing 10 and the tension ring 601. Referring to the above manner, two tension rings 601 are fixed at both ends of the first housing 10. Similarly, referring to the above manner, the second housing 20 is connected to the two tightening rings 601, respectively, so as to complete the assembling process of the first housing 10 and the second housing 20.

To the process with inside unit and external device assembly, at first need pack into the external device with the inside unit after the assembly in, pack into the pressure-bearing barrel promptly, in order to improve the assembly effect, need make the outer wall of inside unit and the interior insulating cylinder of pressure-bearing barrel laminate mutually. However, in designing, in order to facilitate the insertion of the inner unit into the external device, the outer diameter of the inner unit is generally designed to be smaller than the inner diameter of the insulating cylinder, for example, after the inner unit is inserted into the external device, the radial distance between the first housing 10 and the external device is a, and the radial distance between the second housing 20 and the external device is b. At this time, if it is necessary to complete the fitting between the inner unit and the insulating cylinder, it is necessary to eliminate the above-mentioned two radial spaces. In this embodiment, as shown in fig. 4, a tension spring 70 is disposed between two adjacent optical device driver fiber box sets 40, wherein the tension spring 70 is located inside the cavity 30 and at a connection position of the first housing 10 and the second housing 20. Thus, the tension spring 70 does not occupy the space of the optical device disk fiber box group 40, and the tension spring 70 is located inside the cavity 30 and does not occupy the space of the cavity 30 in the thickness direction. Specifically, if the axial distance between two adjacent optical device fiber reel sets is N, the diameter of the tension spring 70 is smaller than N, so as to avoid occupying the space of the optical device fiber reel set 40. In some embodiments, spacers may be disposed in the axial space between two adjacent optical device fiber trays, and these spacers may be used to indicate the assembling position of each optical device fiber tray when assembling the optical device fiber trays, so as to improve the assembling efficiency, and the spacers may serve as ribs in the cavity 30, so as to improve the strength of the cavity 30. Meanwhile, the spacer bar may serve as a base for the tension spring 70, and the tension spring 70 is disposed on the spacer bar.

When the first housing 10 and the second housing 20 are assembled by the tensioning mechanism 60, the screws 602 may be fixed by a specific torque during the process of connecting the tensioning ring 601 with the second housing 20, and at this time, each tensioning spring 70 is in a compressed state and has resilience. After the internal unit is assembled in the external device, by loosening the screw 602 between the tension ring 601 and the second housing 20, each tension spring 70 can release resilience force, so that the first housing 10 and the second housing 20 are tightly attached to the insulating cylinder, the effect of fixing and eliminating air gaps is achieved, and the internal unit is relatively stable in the insulating cylinder and can be well cooled. In a mechanical relationship, the rebound distance c of the tension spring 70 needs to be satisfied, and a + b is less than c, so as to ensure that sufficient rebound distance exists, and the first shell 10 and the second shell 20 are tightly attached to the insulating cylinder.

According to the assembling process, the internal unit and the external device can be tightly fixed through the tensioning mechanism and the tensioning spring, and meanwhile, the tensioning mechanism and the tensioning spring are simple in structure and cannot occupy the space of the optical device fiber box group in the cavity, so that a structural foundation is provided for increasing the volume of the optical device fiber box group.

The above embodiments are only for illustrating the embodiments of the present invention and are not to be construed as limiting the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the embodiments of the present invention shall be included in the scope of the present invention.

Claims

1. An internal unit of a relay amplifier, comprising: a cavity formed by the first housing and the second housing;

at least two optical device fiber tray sets are arranged in the cavity, each optical device fiber tray set comprises a first optical device fiber tray and a second optical device fiber tray, the first optical device fiber tray and the second optical device fiber tray are symmetrically arranged, and a first surface of the first optical device fiber tray is adjacent to a second surface of the second optical device fiber tray;

a tension spring is arranged at the joint of the first shell and the second shell in the cavity and between two adjacent optical device disc fiber box groups;

the tensioning mechanism comprises a tensioning ring and a tensioning screw;

2. The internal unit of claim 1, wherein the set of optics puck boxes is square in radial cross-section.

3. The internal unit according to claim 1, wherein the electro-optical driving unit is disposed on an inner wall of the first housing or the second housing, and a long axis of the electro-optical driving unit is parallel to an axis of the cavity.

4. The interior unit of claim 3, wherein a heat sink material is filled between the electro-optical drive unit and the first housing or the second housing.

5. An internal unit according to claim 4, wherein the axis of the laser is angled with respect to the minor axis of the electro-optical drive unit.

6. The interior unit of claim 5, wherein the first and second housings are of a material having a thermal conductivity above a threshold value; the photoelectric driving unit comprises a circuit board, an electric device and the laser, wherein the electric device and the laser are integrated on the circuit board, a through hole is formed in a first position of the circuit board, which corresponds to the laser, and the size of the through hole is matched with that of the laser; the first shell and the second shell are provided with bosses on a second position corresponding to the first position, the bosses are attached to the bottom surface of the laser in the first position, and heat-conducting media are filled at the attachment positions of the bosses and the laser.

7. The interior unit of claim 1, wherein an axial gap exists between two adjacent optical device driver fiber box groups, the axial gap has a size of N, the tension spring is disposed at the axial gap, and a diameter of the tension spring is smaller than N.

8. The interior unit of claim 1, wherein the cavity is disposed within an external device, wherein when the first housing is engaged with the second housing, a radial distance between the first housing and the external device is a, a radial distance between the second housing and the external device is b, and a spring-back distance of the tension spring is c, wherein a + b < c.

9. A method of tensioning an internal unit of a relay amplifier, applied to the internal unit of the relay amplifier according to any one of claims 1 to 8, comprising: