CN111175921A

CN111175921A - Protection architecture of long line row close-packed fiber array

Info

Publication number: CN111175921A
Application number: CN202010094916.3A
Authority: CN
Inventors: 蔡易平; 文霞; 章法强; 杨光玲; 汤柳
Original assignee: Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics
Current assignee: Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics
Priority date: 2020-02-14
Filing date: 2020-02-14
Publication date: 2020-05-19
Anticipated expiration: 2040-02-14
Also published as: CN111175921B

Abstract

The invention provides a long-line-array densely-arranged optical fiber array protection structure which comprises an array fixing frame, a glue pouring cylinder and pouring glue in the glue pouring cylinder. The array fixing frame comprises a supporting block and a fiber sticking plate; the glue pouring cylinder comprises a front glue pouring cylinder and a rear glue pouring cylinder which are mutually connected, the glue pouring cylinder is filled with glue, solid glue and soft glue are distributed, the solid glue is used for bonding and fixing the relative positions of the array module, the fiber bonding plate and the optical cable and sealing the glue pouring cylinder, the soft glue is used for infiltrating and filling all the spaces around the bare optical fiber and the optical fiber, and the soft glue in the front glue pouring cylinder and the rear glue pouring cylinder is communicated and connected with each other and seals the loose sleeve pipe port in the optical cable; the glue pouring cylinder, the array fixing frame and the pouring glue form a closed long-line array densely-arranged optical fiber array protection structure. The invention realizes the safe use of the long-line-array densely-arranged optical fiber array by designing the long-line-array densely-arranged optical fiber array protection structure, and the structure has significant meaning for image acquisition and transmission in various complex environments.

Description

Protection architecture of long line row close-packed fiber array

Technical Field

The invention relates to the field of manufacturing of precision optical fiber devices, in particular to a protection structure of a long-line-array densely-arranged optical fiber array.

Background

The long-line array close-packed optical fiber array is used for collecting and transmitting large-range and high-precision linear image information, in order to improve the pixel density of collected images and realize signal transmission, a section of optical fiber at the end part of a large-core optical cable is removed from a coating layer protected outside to form bare optical fibers, then the bare optical fibers are orderly close-packed to form an array module of the long-line array close-packed optical fiber array, an extension section of the bare optical fibers is usually arranged at the rear part of the array module, and the diameter conversion of the optical fibers protected by the coating layer and the bare optical fibers close-packed in the array module is realized through the limited bending of the extended section of the bare optical fibers. The bare optical fiber is usually thin and brittle glass fiber, the array module is a linear image acquisition module or an output module which is made by orderly arranging and positioning the bare optical fibers through a monocrystalline silicon wafer with a V-shaped groove or a trapezoid groove engraved on the surface, the bare optical fibers, the optical fibers and the array module need to be protected in the manufacturing and application process of the long-line array densely-arranged optical fiber array, and meanwhile, a proper interface is also needed for the connection and application of the long-line array densely-arranged optical fiber array with the image generation device and the acquisition and recording device. Therefore, an effective array protection structure is designed, and the long-line-array densely-arranged optical fiber array is used for the problem that the acquisition and transmission of large-range and high-precision linear image information under various environments must be solved firstly.

Disclosure of Invention

In order to meet the application requirements of the long-line-array densely-arranged optical fiber array, the invention provides a long-line-array densely-arranged optical fiber array protection structure, and the safe use of the long-line-array densely-arranged optical fiber array is realized through the installation and the application of the structure.

In order to achieve the purpose, the invention provides the following technical scheme:

a protection structure of a long-line-row densely-arranged optical fiber array is characterized by comprising an array fixing frame, a glue filling cylinder and pouring glue in the glue filling cylinder, wherein the array fixing frame comprises a supporting block, a fiber bonding plate behind the supporting block and two parallel threaded rods fixedly connecting the supporting block and the fiber bonding plate; the glue filling cylinder comprises a front glue filling cylinder and a rear glue filling cylinder which are mutually connected; the potting adhesive in the potting cylinder is divided into solid adhesive and soft adhesive, the solid adhesive is used for bonding and fixing the relative positions of the array module, the array fixing frame and the optical cable and sealing the potting cylinder, the soft adhesive is used for infiltrating and filling all spaces around the bare optical fiber and the optical fiber in the front potting cylinder and the rear potting cylinder, and the soft adhesive in the front potting cylinder and the rear potting cylinder is connected and communicated with and seals the loose sleeve port in the optical cable; the glue pouring cylinder, the array fixing frame and the pouring glue form a closed long-line array densely-arranged optical fiber array protection structure.

Furthermore, a connecting flange is arranged outside the front glue filling cylinder, a positioning step and a pressure ring of the array fixing frame are arranged in the front glue filling cylinder, and a clamping seat and a clamping block fastening connection optical cable are arranged at the rear end of the rear glue filling cylinder.

Furthermore, the supporting block in the array fixing frame comprises a bottom block and a pressing block which are connected; a limiting groove with a planar groove bottom is arranged on the bottom block, and a limiting step is arranged at the rear end of the groove bottom of the limiting groove; the lower part of the pressing block is provided with a limiting head of which the lower end surface is a plane, and the lower end surface of the limiting head and the groove bottom of the limiting groove are parallel to clamp and fix the array module.

The groove edges on two sides of the limiting groove of the bottom block of the supporting block are provided with threaded holes, the two sides of the pressing block are provided with through holes, and the bottom block is connected with the pressing block through screws.

Furthermore, the fiber sticking plate in the array fixing frame comprises a bottom plate and a cover plate which are connected with each other; an optical fiber groove is formed in the bottom plate, silica gel is arranged in the optical fiber groove, and steps are arranged on groove edges on two sides of the optical fiber groove; the cover plate is a T-shaped cover plate, and the cover plate is buckled into the optical fiber groove along the steps on the two sides of the optical fiber groove and connected with the bottom plate.

Furthermore, the lower part of the bottom plate of the fiber sticking plate is axially provided with two parallel through connecting holes, two threaded rods penetrate through the connecting holes at the lower part of the bottom plate of the fiber sticking plate and are fixedly connected with the bottom block of the supporting block, nuts are respectively arranged on the threaded rods at two ends of the connecting holes, and the nuts clamp the bottom plate of the fiber sticking plate and control the distance between the fiber sticking plate and the supporting block.

Furthermore, the groove bottoms of the limiting grooves on the bottom blocks of the supporting blocks fixedly connected with the two threaded rods and the groove bottoms of the optical fiber grooves on the bottom plate of the fiber sticking plate are on the same plane.

Two threaded holes corresponding to the connecting holes at the lower part of the bottom plate of the fiber bonding plate are formed in the end surface of the rear part of the bottom block of the supporting block, a short threaded section and a long threaded section are respectively arranged at two ends of the threaded rod, the short threaded section is connected with the threaded holes at the rear part of the bottom block of the supporting block, and a nut is arranged for reinforcing connection; the long thread section penetrates through a connecting hole in a bottom plate of the fiber sticking plate, the long thread sections of the threaded rods at two ends of the connecting hole are respectively provided with a nut, and the bottom plate of the fiber sticking plate is clamped tightly through an adjusting nut and the distance between the fiber sticking plate and the supporting block is controlled.

The plane formed by bare optical fiber cores in the array module clamped and fixed by the array fixing frame is basically superposed with the central plane of the optical fiber set gathered and bonded by the fiber bonding plate.

Furthermore, a positioning step in the front glue filling cylinder is arranged on the inner side of the front end port of the front glue filling cylinder; the rear parts of the bottom block and the pressing block of the supporting block of the array fixing frame are respectively provided with margins with the same thickness; the pressing ring presses the edge width to abut against a positioning step in the front glue filling cylinder, the array fixing frame is fixedly connected with the front glue filling cylinder, and the front end face of the supporting block is flush with the front end port of the front glue filling cylinder.

The front rubber filling cylinder is characterized in that a plurality of threaded holes are formed in the step surface of the positioning step of the front rubber filling cylinder, a plurality of through holes are formed in the edge webs of the pressing ring and the supporting block and correspond to the threaded holes in the positioning step respectively, the pressing ring is pushed by a screw to press the edge web of the supporting block to abut against the positioning step in the front rubber filling cylinder, and the front end face of the supporting block is flush with the front end port of the front rubber filling cylinder and seals the front end port of the front rubber filling cylinder.

The connecting flange outside the front glue filling cylinder is positioned outside the front end port of the front glue filling cylinder, through holes are uniformly distributed in the connecting flange, and the long-line-array densely-arranged optical fiber array is connected with the image generating or image recording device through the connecting flange.

Furthermore, an internal thread and a connecting step I are arranged in a port at the rear end of the front glue pouring cylinder, and a connecting step II and a loop thread ring are arranged outside a port at the front end of the rear glue pouring cylinder; the second connecting step abuts against the first connecting step and is fixedly connected with the front glue filling cylinder and the rear glue filling cylinder through the loop threaded ring.

Solid glue is coated on the inner thread at the rear end of the front glue filling cylinder, the thread of the loop thread ring at the front end of the rear glue filling cylinder, the surfaces of the first connecting step and the second connecting step, and the front glue filling cylinder and the rear glue filling cylinder are connected in a sealing manner.

Furthermore, a clamping seat at the rear end of the rear glue pouring cylinder is welded with the rear glue pouring cylinder into an integral structure, and semi-annular grooves or tooth grooves corresponding to the number of the optical cables are axially arranged on the clamping seat; the clamping block and the clamping seat are oppositely arranged, one or more semi-annular tooth sockets or grooves are correspondingly arranged on the clamping block and the grooves or tooth sockets on the clamping seat, and clamping teeth are uniformly distributed on the inner surface of each tooth socket along the axial direction of each tooth socket; two threaded holes are respectively formed in the edges of two sides of a central shaft on the opposite face of the clamping block relative to the clamping block of the clamping seat, two through holes are respectively formed in the edges of two sides of the central shaft on the opposite face of the clamping block relative to the clamping seat, the clamping block is connected with the clamping seat through screws, and the grooves and the tooth grooves are used for clamping optical cables at the rear part of the long-line densely-arranged optical fiber array relatively to enable the optical cables.

The front rubber filling cylinder and the supporting block are made of easily ground materials such as aluminum or copper and the like.

Further, injecting the solid glue and the soft glue in the glue filling cylinder in a grading manner; the solid glue comprises a first solid glue, a second solid glue and a third solid glue, and a through channel is axially arranged on the second solid glue; the soft glue comprises a soft glue I and a soft glue II, the soft glue I and the soft glue II are communicated through a channel arranged on the solid glue II, and the soft glue II seals the loose tube port at the front end of the optical cable.

The filling distribution of the solid glue and the soft glue in the glue filling cylinder is characterized in that:

the first solid glue is filled and distributed at the front end of the front glue filling cylinder, and fills the supporting block and all gaps around the supporting block in a soaking manner;

the second solid glue is filled and distributed between the front glue filling cylinder and the rear glue filling cylinder, the position of the fiber adhering plate is fixed, and a connecting gap between the front glue filling cylinder and the rear glue filling cylinder is sealed;

the solid glue III is filled and distributed at the rear end of the rear glue pouring cylinder, the rear end of the rear glue pouring cylinder is sealed, and the fixed connection of the clamping seat and the clamping block to the optical cable is strengthened;

the soft rubber I is filled and distributed in the front rubber filling cylinder and infiltrates and fills all gaps around the bare optical fibers and the optical fibers in the front rubber filling cylinder;

and the second soft glue is filled and distributed in the rear glue filling cylinder, soaks all gaps around the optical fibers in the filled glue filling cylinder, and fills and seals the loose tube ports in the optical cables.

In addition, the solid glue and the soft glue in the glue filling cylinder also have the following characteristics:

a, after being cured, the solid glue in the glue pouring cylinder is in a solid state, preferably 353ND thermal infrared curing glue, and after being cured, the soft glue is in a soft state, preferably HY9400 liquid tank sealant (jelly glue);

b, degassing and soaking the soft glue and the solid glue before use;

c, limiting the axial total length of the first solid glue infiltration filling to be lower than the shortest length of the curing stress of the solid glue to damage the bare optical fiber, wherein for 353ND thermal infrared curing glue, the axial total length of the first solid glue infiltration filling is not more than 15 mm.

The invention has the advantages that

1. The array fixing frame and the glue filling cylinder are designed to realize the fixed connection protection of the long-line densely-arranged optical fiber array, the array fixing frame comprises a supporting block and a fiber sticking plate, a limiting groove with a planar groove bottom is arranged on a bottom block of the supporting block, a limiting step is arranged at the rear end of the groove bottom of the limiting groove, an array module is clamped in parallel with the groove bottom of the limiting groove through a limiting head with a planar lower end face at the lower part of the pressing block, the radial displacement and the axial displacement of the array module are limited, and the array module is fixed; an optical fiber groove is formed in the bottom plate of the fiber sticking plate, silica gel is arranged in the optical fiber groove, the silica gel soaks the optical fibers and sticks the bottom plate, the cover plate in the optical fiber groove and above the optical fiber bottom plate together; the fiber sticking plate is connected with the supporting block through two parallel threaded rods behind the supporting block, the groove bottom of a limiting groove on the bottom block of the supporting block and the groove bottom of an optical fiber groove on the bottom plate of the fiber sticking plate after connection are on the same plane, so that the optical fibers stuck and fixed in the optical fiber groove are axially consistent with the bare optical fibers in the array module, nuts at two ends of a connecting hole at the lower part of the bottom plate of the fiber sticking plate are adjusted, the bottom plate of the fiber sticking plate is clamped, the distance between the fiber sticking plate and the supporting block is controlled, and an array fixing frame (an inner protection structure of an array) is formed; the array fixing frame is fixedly connected with the array module and the optical fiber behind the array module, so that all subsequent operation stress on the array before the glue filling cylinder is installed is borne by the array fixing frame. The glue filling cylinder comprises a front glue filling cylinder and a rear glue filling cylinder, a positioning step and a pressing ring are arranged in the front glue filling cylinder, and the pressing ring is pushed by a screw to fix the array fixing frame at the front port of the front glue filling cylinder; the rear glue filling cylinder is fixedly connected with the front glue filling cylinder through a loop threaded ring, a clamping seat and a clamping block are arranged at the rear part of the rear glue filling cylinder, the optical cable penetrates through the rear glue filling cylinder and is placed in a groove in the clamping seat, the clamping block is connected with the clamping seat, and the optical cable is clamped by clamping teeth on the clamping block. The glue filling cylinder is fixedly connected with the array fixing frame and the optical cable, and simultaneously, the bare optical fiber, the optical fiber and the array module are initially isolated from the outside, so that an outer protection structure of the array is formed, and damage to the long-line-array densely-arranged optical fiber array in the moving process is avoided. The array module, the bare optical fiber, the optical fiber and the optical cable are connected in a stable mechanical connection through the internal protection structure and the external protection structure formed by the array fixing frame and the glue filling cylinder, so that the fixed connection protection of all parts of the long-line array densely-arranged optical fiber array is realized.

2. The pouring sealant structure combining the soft glue and the solid glue is designed to enhance the shock and vibration resistance of the long-line-array densely-arranged optical fiber array.

In the invention, the array fixing frame is arranged in the glue filling cylinder and fixedly connected with the optical cable, and the glue filling cylinder is filled with solid glue and soft glue. The solid glue is used for bonding and fixing the relative positions of the array module, the array fixing frame and the optical cable and sealing the glue filling cylinder, the soft glue is used for infiltrating and filling all the spaces around the bare optical fiber and the optical fiber, so that the bare optical fiber at the rear part of the array module and the optical fiber at the rear part of the fiber sticking plate are both in a soft medium environment, the impact vibration to the bare optical fiber and the optical fiber when the long-line-row densely-arranged optical fiber array is used in a complex environment can be buffered, and the bare optical fiber and the optical fiber are.

3. The soft glue in the front and back glue filling cylinders is communicated and seals the end of the loose tube in the optical cable, and the stress generated by the expansion with heat and contraction with cold of the soft glue is released into the longer loose tube, so as to realize the temperature change resistant protection of the array. Because the soft glue is a jelly-shaped soft medium after being solidified, under different environmental temperatures, the inside of the soft glue in a fixed volume generates heat expansion and cold contraction stress which cannot be ignored, therefore, a through channel is axially arranged on the solid glue II in the invention, so that the soft glue I and the soft glue II are in through connection, and the loose sleeve port in the optical cable is sealed by the soft glue II filled in the post-pouring glue cylinder. With the structure, impact vibration resistance protection of the optical fiber and the bare optical fiber is realized, a complete thermal expansion and cold contraction stress transfer channel is formed in the glue filling cylinder, stress generated by temperature change of the soft glue is released into the loose sleeve with the longer optical cable, and the loose fiber core paste in the loose sleeve is used for eliminating stress, so that the optical fiber and the bare optical fiber are prevented from being damaged by temperature change.

Drawings

Fig. 1a is a front view of a protection structure of a long-line-array closely-spaced optical fiber array in embodiment 1 of the present invention;

FIG. 1b is an enlarged partial view of the I position of FIG. 1 a;

FIG. 1c is an enlarged partial view of the location II in FIG. 1 a;

3 FIG. 31 3 d 3 is 3 a 3 view 3 from 3 A 3- 3 A 3 of 3 FIG. 31 3 a 3; 3

FIG. 1e is a view from B-B in FIG. 1 a;

FIG. 1f is a view from the C-C in FIG. 1 a;

FIG. 2 is a schematic diagram showing the distribution of the potting compound in example 1 of the present invention;

FIG. 3 is a schematic structural view of a front potting cylinder in embodiment 1 of the present invention;

FIG. 4 is a schematic view of the connecting structure of the bottom plate and the bottom block in the array fixing frame in embodiment 1 of the present invention;

FIG. 5a is a schematic structural diagram of a long-line closely-arranged optical fiber array in example 1 of the present invention;

FIG. 5b is a schematic structural diagram of an array module in embodiment 1 of the present invention;

FIG. 6 is a schematic structural view of a front potting cylinder in embodiment 2 of the present invention;

FIG. 7 is a schematic view of the optical cable fixing and connecting structure at the rear end of the rear potting cylinder in embodiment 3 of the present invention;

in the figure, 1, a long linear array densely-arranged optical fiber array 2, a supporting block 3, a threaded rod 4, a fiber bonding plate 5, a front potting cylinder 6, solid glue 7, a rear potting cylinder 8, soft glue 9, a pressing ring 11, an array module 12, bare fibers 13, optical fibers 14, optical cables 141, a loose tube 111, a silicon baseplate 112, a silicon cover plate 113, a glass cover plate 21, a bottom block 22, a pressing block 211, a limiting groove 212, an edge width 213, a limiting step 214, a threaded hole 221, a limiting head 31, a short threaded section 32, a long threaded section 33, a nut 41, a baseplate 42, a cover plate 411, an optical fiber groove 412, a step 413, a connecting hole 401, a silicon rubber 51, a connecting flange 52, a positioning step 53, an internal thread 54, a connecting step one 61, a solid glue one 62, a solid glue two 621, a channel 63, a solid glue three 71, a clamping seat 72, a clamping block 73, a bolt 74, a connecting step two 711 The tooth 81, the first soft rubber 82, the second soft rubber 91, the screw 501, the flange connecting seat 502, the front potting body 511, the through hole 703 and the center block.

Detailed Description

The long-line-array densely-arranged optical fiber array is made by linearly and densely arranging hundreds or thousands of optical fibers, in order to obtain enough image transmission units and realize equidistant transmission of pixel information, one or more optical cables with large core number are generally used, all protective layers outside one section of optical cable are removed from the end part of the optical cable to form optical fibers, then a coating layer outside one section of optical fiber at the front end of each optical fiber is removed to form bare optical fibers, and a silicon substrate with V-shaped or trapezoidal optical fiber positioning grooves engraved on the surface is bonded and positioned by combining curing glue to form an array module. Therefore, the protection structure of the long-linear-array densely-arranged optical fiber array needs to complete the fixed connection protection of the array module, the optical fiber, the bare optical fiber and the optical cable and the application protection of the long-linear-array densely-arranged optical fiber array against shock vibration and temperature change in various application environments, so that the normal use of the long-linear-array densely-arranged optical fiber array is realized.

The protection structure of a long-line-array densely-arranged optical fiber array according to the present invention is further described with reference to the accompanying drawings and embodiments.

Example 1

As shown in fig. 1 to 5, this embodiment provides a protection structure for a long-linear-array densely-arranged optical fiber array 1, where the number of image transmission units in the long-linear-array densely-arranged optical fiber array for a complex environment is 288, an array module 11 is made of bare optical fibers 12 formed by removing a coating layer from optical fibers 13 in a 2-12 × 12-144-core optical cable 14, and the optical fibers in each optical cable are evenly distributed in 12 loose tubes; the array module 11 is manufactured by limiting 288 bare fibers to be linearly arranged in a close manner through a silicon bottom plate 111 carved with a trapezoid groove, a silicon cover plate 112 and a glass cover plate 113, the thickness of the silicon bottom plate and the silicon cover plate is 0.5mm, the thickness of the glass cover plate is 0.4mm, the structural size of the array module is 40mm multiplied by 10mm multiplied by 1.04mm, the linear length of an array end face formed by the close arrangement of the bare fibers is 36.3mm, an extended section of the bare fibers for diameter conversion of the optical fibers and the closely arranged bare fibers is arranged between the array module and the optical fibers, and the length of the bare fibers of the extended section is about 35 mm.

Aiming at the special structural form and the service environment of the long-line-array densely-arranged optical fiber array 1, the long-line-array densely-arranged optical fiber array protection structure is designed to be divided into a fixed connection protection structure, an anti-impact vibration structure and an anti-temperature change structure of each array part, wherein the fixed connection protection structure comprises an inner protection structure and an outer protection structure, and the structures are embodied as follows: a long-line-array densely-arranged optical fiber array protection structure comprises an array fixing frame, a glue filling cylinder and pouring glue in the glue filling cylinder. The array fixing frame is arranged in the glue filling cylinder and comprises a supporting block 2, a fiber sticking plate 4 behind the supporting block and two parallel threaded rods 3 fixedly connecting the supporting block and the fiber sticking plate, the supporting block 2 clamps and fixes the array module 11, and the fiber sticking plate 4 gathers the optical fibers 13 behind the fiber sticking module 11; the glue filling cylinder comprises a front glue filling cylinder 5 and a rear glue filling cylinder 7 which are mutually connected, a connecting flange 51 connected with other devices is arranged outside the front glue filling cylinder 5, a positioning step 52 and a pressing ring 9 for installing an array fixing frame are arranged in the front glue filling cylinder, and a clamping seat 71 and a clamping block 72 are arranged at the rear end of the rear glue filling cylinder 7 to be fixedly connected with the optical cable 14; the pouring sealant is filled in the pouring cylinder, the pouring sealant is divided into solid glue 6 and soft glue 8, the solid glue 6 is adhered to and fixes the relative positions of the array module 11, the array fixing frame and the optical cable 14 and seals the pouring cylinder, the soft glue 8 is infiltrated and filled in all the spaces around the bare optical fiber 12 and the optical fiber 13, the soft glue in the front pouring cylinder 5 and the rear pouring cylinder 7 is communicated with and seals the port of the loose tube 141 in the optical cable 14 (in the embodiment, the solid glue is 353ND thermal infrared curing glue, the soft glue is HY9400 liquid tank sealant and is commonly called jelly glue); the glue pouring cylinder, the array fixing frame and the pouring glue form a closed long-line array densely-arranged optical fiber array protection structure.

In this embodiment, the internal protection of the array is performed by the array fixing frame, which is used to fixedly connect the array module 11 and the optical fiber behind the array module, and to bear all subsequent operational stresses to the array before the potting cylinder is installed (including removal of excess bare optical fiber on the end face of the array, preliminary grinding of the end face of the array before the potting cylinder is installed, etc.). The array fixing frame comprises a supporting block 2, a fiber bonding plate 4 behind the supporting block, and two parallel threaded rods 3 fixedly connecting the supporting block and the fiber bonding plate, wherein the supporting block comprises a bottom block 21 and a pressing block 22, a limiting groove 211 with a planar groove bottom is arranged on the bottom block, the planar size of the groove bottom is 40mm multiplied by 10mm, an array module at the front part of the long-line densely-arranged optical fiber array is placed in the limiting groove, a long-strip-shaped limiting step 213 is arranged at the rear end of the groove bottom of the limiting groove (the limiting step can be a step formed by partially protruding the rear end part of the groove bottom of the limiting groove, or a step formed by installing a long-strip-shaped rectangular strip at the rear end of the groove bottom of the limiting groove, the height of the upper end surface of the limiting step protruding out of the planar groove bottom of the limiting groove is 0.4mm, the length of the limiting step is 38mm), a limiting head 221 with a planar lower end surface is arranged, the lower end face of the limiting head 221 and the groove bottom of the limiting groove 211 are parallel to clamp and fix the array module 11, the groove edges on two sides of the limiting groove of the bottom block are provided with threaded holes 214, two sides of the pressing block are provided with through holes, and the bottom block and the pressing block are connected through screws; the fiber sticking plate 4 behind the supporting block comprises a bottom plate 41 and a cover plate 42 above the bottom plate, an optical fiber groove 411 is arranged on the bottom plate, silica gel 401 is arranged in the optical fiber groove, the optical fibers 13 behind the array module 11 are placed in the optical fiber groove 411, steps 412 are arranged on groove edges on two sides of the optical fiber groove, the cover plate 42 is a T-shaped cover plate, the lower end part of the cover plate 42 is buckled into the optical fiber groove along the steps 412 on two sides of the optical fiber groove 411 to be connected with the bottom plate, and the optical fibers 13 are limited in the optical fiber groove 411 (the steps are arranged on the bottom plate, the cover plate is arranged to be a T-shaped cover plate, the cover plate and the bottom plate which are adhered with the fiber plate are accurately connected; the lower part of the bottom plate 41 of the fiber sticking plate 4 is provided with two parallel through connecting holes 413 along the axial direction, the end surface of the rear part of the bottom block 21 of the supporting block 2 is provided with two threaded holes corresponding to the connecting holes on the fiber sticking plate, the two ends of the threaded rod 3 are respectively provided with a short threaded section 31 and a long threaded section 32, the short threaded section 31 is connected with a threaded hole on the bottom block 21 of the supporting block 2, a nut 33 is arranged for reinforced connection, the long thread section 32 passes through a connecting hole 413 on a bottom plate 41 of the fiber sticking plate, the long thread sections 32 of the threaded rods at two ends of the connecting hole are respectively provided with a nut, the nuts at two ends of the connecting hole are adjusted to clamp the bottom plate of the fiber sticking plate and control the distance between the fiber sticking plate and the supporting block to form an array fixing frame (the designed distance between the fiber sticking plate and the supporting block is 38mm), the groove bottom of the limiting groove 211 on the bottom block of the supporting block connected through the threaded rod and the groove bottom of the optical fiber groove 411 on the bottom plate of the fiber sticking plate are in the same plane.

In the assembly of the embodiment, the optical fiber 13 is firstly gathered and bonded at the position of the optical fiber behind the bare optical fiber 12 by using the fiber bonding plate 4, after the silica gel 401 on the fiber bonding plate is cured, two threaded rods 3 parallelly penetrate through two connecting holes 413 on the bottom plate 41 of the fiber bonding plate 4 to be connected with threaded holes on the rear end face of the bottom block 21 of the supporting block 2, the threaded rods 3 and the bottom block 21 are fixed, nuts 33 at two ends of the connecting holes are adjusted by utilizing the groove bottom of the limiting groove 211 and the groove bottom of the optical fiber groove 411 on the same plane, so that the front end part of the array module 11 is flush with the front end part of the bottom block and can be horizontally placed at the groove bottom of the limiting groove, 353ND heat curing glue is coated at the groove bottom of the limiting groove after adjustment, the rear end edge of the silicon bottom plate 111 of the array module abuts against the limiting step 213 to be placed in the limiting groove, the bare optical fiber 12 at the rear side is naturally led out along the limiting step 213, 353ND heat curing glue is coated, the front end part of the pressing block is flush with the front end part of the bottom block, the lower end face of the limiting head and the groove bottom of the limiting groove are parallel to clamp the array module, the pressing block and the bottom block are fixedly connected through screws, and the array module is installed. The array module is characterized in that the radial position of the assembled array module is limited by the lower end face of the limiting head and the limiting groove, the axial position of the array module is limited by the limiting step from the rear lower part of the array module against the silicon bottom plate of the array module, the distance between the fiber sticking plate and the supporting block is easy to control, the plane formed by the fiber core of the bare fiber in the array module is basically superposed with the central plane of the fiber collection which is gathered and bonded by the fiber sticking plate, the bare fiber between the fiber sticking plate and the supporting block cannot be damaged, and therefore the fixed connection of the array module and the rear fiber is safely and reliably realized.

In this embodiment, the external protection of the array is accomplished by the potting compound cylinder, which is used to install the array fixing frame, and fixedly connect the array fixing frame and the optical cable, so that the bare fiber 12, the optical fiber 13, and the array module 11 are initially isolated from the outside, and the connection of the long-line array and the densely arranged optical fiber array with other devices is realized. The glue filling cylinder comprises a front glue filling cylinder 5 and a rear glue filling cylinder 7 which are connected with each other: a connecting flange 51 is arranged outside the front end port of the front rubber filling cylinder 5, through holes 511 are uniformly distributed on the connecting flange 51, and the long linear array densely arranged optical fiber array is connected with an image generating or image recording device through the connecting flange; a positioning step 52 and a pressing ring 9 are arranged on the inner side of the front end port of the front glue filling cylinder, a plurality of threaded holes are uniformly distributed on the step surface of the positioning step 52, the rear parts of the bottom block 21 and the pressing block 22 of the supporting block 2 of the array fixing frame are respectively provided with an edge width 212 (the thickness is 2mm in the embodiment) with the same thickness, a plurality of through holes are respectively arranged on the pressing ring 9 and the edge width 212 corresponding to the threaded holes on the positioning step 52, the array fixing frame is arranged in the front glue filling cylinder from the rear end of the front glue filling cylinder 5, the pressing ring 9 is parallelly pushed by using a screw 91, the edge width 212 is pressed to abut against the positioning step 52 in the front glue filling cylinder to fixedly connect the array fixing frame and the front glue filling cylinder 5, the front end port of the supporting block 2 is flush with the front end port of the front glue filling cylinder and seals the front end port of the front glue filling cylinder (the edge width is, the bottom block and the pressing block cannot shift mutually in the pushing process, and the front end surfaces of the bottom block and the pressing block are ensured to be flush and evenly pressed into the array module); an internal thread 53 and a connecting step 54 are arranged in a port at the rear end of the front glue filling cylinder, a connecting step two 74 and a loop thread ring 73 are arranged outside a port at the front end of the rear glue filling cylinder 7, the loop thread ring 73 outside the port at the front end of the rear glue filling cylinder is screwed into the internal thread 53 of the front glue filling cylinder, so that the connecting step two 74 is abutted against the connecting step one 54 to fixedly connect the front glue filling cylinder 5 and the rear glue filling cylinder 7 (353 ND heat-curing glue is coated on the internal surface of the front end port of the front glue filling cylinder and the internal thread of the rear end port of the front glue filling cylinder before the array fixing frame is arranged in the front glue filling cylinder and before the rear glue filling cylinder is connected with the front glue filling cylinder, and the 353ND heat-curing glue is coated on the threads of the loop thread ring of the rear glue filling cylinder and the surfaces of the connecting step one and the connecting step two, so that the front end of the front glue filling cylinder is fixedly connected with the array fixing frame and the rear end of the front glue filling; the rear end of the rear glue filling cylinder is provided with a clamping seat 71 and a clamping block 72, the clamping seat 71 and the rear glue filling cylinder 7 are welded into an integral structure, two semi-annular grooves 711 are axially arranged on the clamping seat, the optical cable 14 penetrates through the rear glue filling cylinder 7 and is placed in the grooves 711, the clamping block 72 and the clamping seat 71 are oppositely arranged, two semi-annular tooth sockets 721 are correspondingly arranged on the clamping seat and the grooves 711 on the clamping seat, clamping teeth 7211 are axially and uniformly distributed on the inner surfaces of the tooth sockets along the tooth sockets, two threaded holes are respectively arranged on the two side edges of the central shaft on the opposite surface of the clamping seat opposite to the clamping block, two through holes are respectively arranged on the two side edges of the central shaft on the opposite surface of the clamping block opposite to the clamping seat, the clamping block is connected with the clamping seat through bolts, the optical cable at the rear part of the optical fiber array is tightly clamped by the grooves and the tooth sockets so that the optical cable is, is beneficial to keeping the relative position of the rear potting adhesive barrel and the optical cable in the radial direction).

Therefore, through the installation of the array fixing frame in the front end port of the front glue filling cylinder, the loop threaded ring connection of the rear glue filling cylinder and the front glue filling cylinder and the fixed connection of the rear glue filling cylinder and the optical cable, the bare optical fibers, the optical fibers and the array modules of the long-line-array densely-arranged optical fiber array are initially isolated from the outside, an outer protection structure of the array is formed, and the damage to the long-line-array densely-arranged optical fiber array in the moving process can be avoided. Meanwhile, the array module, the bare optical fiber, the optical fiber and the optical cable are connected in a stable mechanical connection mode through the internal protection structure and the external protection structure formed by the array fixing frame and the glue filling cylinder, and fixed connection protection of all parts of the long-line-array densely-arranged optical fiber array is achieved.

In this embodiment, 288 bare fibers provided by 2 optical cables are used to manufacture a long-line-array densely-arranged optical fiber array, and the bare fiber 121 is formed by removing a coating layer on the optical fiber by about 60mm from a section of the front end of the optical fiber; the threaded holes in the long-line densely-arranged optical fiber array protection structure are threaded blind holes and comprise 4 threaded holes in the positioning step at the front port of the front potting cylinder, 4 threaded holes in the clamping seat at the rear end of the rear potting cylinder and 4 threaded holes 214 in the groove edges at two sides of the limiting groove of the bottom block of the supporting block; through holes are arranged corresponding to the threaded blind holes and comprise 4 through holes on the side of the supporting block, 4 through holes on two sides of the pressing block of the supporting block, 4 through holes on the pressing ring, 4 through holes on the clamping block and 4 through holes 511 on the connecting flange; 4 screws 91 are respectively used for fastening and connecting the supporting block and the positioning step, 4 screws are used for fastening and connecting the bottom block and the pressing block of the supporting block, and 4 bolts 73 are used for fastening and connecting the clamping block and the clamping seat; in the array fixing frame, the supporting block and the fiber sticking plate are connected through threaded rods, in order to strengthen the connection and adjust the distance between the supporting block and the fiber sticking plate, 1 nut is respectively arranged on the short threaded section of each of the two threaded rods, and 2 nuts 33 are respectively arranged on the long threaded section; in addition, in order to facilitate that the end face of the product after the protection structure is applied to the long-line-array densely-arranged optical fiber array can be ground together with the end face of the array module, the front rubber filling cylinder and the supporting block are preferably made of easily-ground materials such as aluminum or copper.

The inner protection structure and the outer protection structure of the long-line-array densely-arranged optical fiber array formed by the design and manufacture realize the fixed connection protection of each part of the long-line-array densely-arranged optical fiber array, but bare optical fibers 12 and optical fibers 13 in a suspended state still exist in the potting cylinder, and the safety of the array use still cannot be completely guaranteed under the unpredictable conditions that strong impact vibration, humid gas erosion and possible foreign matters enter from a connecting gap of the potting cylinder and the like, therefore, the anti-impact vibration structure of the closed long-line-array densely-arranged optical fiber array is designed to be composed of the potting adhesive in the potting cylinder, and the concrete structure is as follows: the pouring sealant is filled in the pouring cylinder and is divided into solid glue 6 and soft glue 8; the solid glue is in a solid state after being solidified, and the solid glue is used for bonding and fixing the relative positions of the array module 11, the array fixing frame and the optical cable 14 and sealing the glue filling cylinder; the soft glue is in a soft state after being cured, and the soft glue is soaked and filled in all the spaces around the bare optical fiber 12 and the optical fiber 13 in the front glue filling cylinder 5 and the rear glue filling cylinder 7. In order to realize the functions of solid glue and soft glue at different positions in the glue filling cylinder, the solid glue and the soft glue in the glue filling cylinder are injected in a grading way, the solid glue and the soft glue injected in the grading way comprise a first solid glue 61, a second solid glue 62, a third solid glue 63, a first soft glue 81 and a second soft glue 82, and the positions and the functions of the glue and the soft glue in the glue filling cylinder are respectively as follows: injecting a first solid glue 61 around a support block 2 of an array fixing frame in a front end port of a front glue filling cylinder from the rear end of a front glue filling cylinder 5, wherein the first solid glue 61 is used for infiltrating and filling the support block 2 and all gaps around the support block (note that, in the manufacturing and assembling of an array module, the first solid glue is directly used for positioning a bare optical fiber and installing the array module, and the first solid glue is directly contacted with the bare optical fiber behind the array module, so that in order to prevent the curing stress generated in the curing process of the first solid glue from damaging the bare optical fiber, in the embodiment, the total axial length of infiltration and filling of the first solid glue of 353ND material is limited to be not more than 15mm (including the length of the support block); after the solid glue I is solidified, injecting a soft glue I81 into the front glue filling cylinder, and infiltrating all gaps around the bare optical fibers 12 and the optical fibers 13 in front of the fiber sticking plate 4 in the front glue filling cylinder 5 by the soft glue I81 to protect the suspended bare optical fibers and optical fibers in the array fixing frame; the fixing of the fiber sticking plate is fixed by a second solid glue 62 behind the first soft glue 81, after the second solid glue is injected, the rear glue filling cylinder 7 and the front glue filling cylinder 5 are connected, after the second solid glue is solidified, the position of the fiber sticking plate 4 is fixed, and all gaps connected with the front glue filling cylinder and the rear glue filling cylinder are sealed; the protection of the optical fiber behind the fiber bonding plate 4 and in front of the loose tube 141 at the end part of the optical cable is completed by the second soft glue 82, and the second soft glue 82 soaks all gaps around the optical fiber 13 in the filled glue filling cylinder 7 to seal the port of the loose tube in the optical cable; and after the soft glue II is cured, injecting solid glue III 63 from the rear end of the rear glue filling cylinder, and filling all gaps around the optical cable (including the loose tube) at the rear end of the rear glue filling cylinder by using the solid glue III 63. And then the clamping block 72 and the clamping seat 71 are connected, the rear end of the rear rubber filling cylinder is sealed, and the fixed connection of the clamping block 72 and the clamping seat 71 to the optical cable can be enhanced after the solid rubber is solidified.

The solid glue 6 and the soft glue 8 strengthen the fixed connection and the shock-resistant vibration protection of each component in the glue filling cylinder, and the array can be in different temperature environments in specific use, the soft glue in the glue filling cylinder is in a soft state (jelly glue) after being cured, the soft glue can generate the phenomena of expansion with heat and contraction with cold at different environmental temperatures, even though HY9400 has a wider use temperature range, the internal stress of the soft glue generated by the expansion with heat and the contraction with cold acts on the optical fiber 13 or the bare optical fiber 12, and the damage can still be generated. The fiber core paste filled in the loose tube 141 of the optical cable is a material with small influence of temperature change on the volume, and the fiber core paste in the loose tube is in a loose state, a transfer channel can be arranged between the front and rear glue filling cylinders, and the volume expansion or contraction stress generated by the expansion with heat and contraction with cold of the soft glue I81 and the soft glue II 82 is released into the longer loose tube, so that the damage to the bare optical fiber and the optical fiber is avoided. Therefore, a through channel 621 is arranged in the second solid glue 62 to connect the soft glue in the front and rear glue filling cylinders in a through manner, and simultaneously, when the second soft glue 82 is injected into the rear glue filling cylinder, all the ports of the loose tube in the optical cable are positioned in the second soft glue 82, so that when the temperature is changed greatly, the expansion and contraction stress of the first soft glue 81 in the front glue filling cylinder 5 is transmitted to the second soft glue 82 in the rear glue filling cylinder 7 through the through channel arranged in the second solid glue 62, and the stress in the second soft glue 82 is released into a longer loose tube through the port of the loose tube 141 sealed by the second soft glue to form a complete stress transmission channel, thereby realizing the temperature change resistance function of the long-line densely-arranged optical fiber array application protection structure.

Through the design and the comprehensive application of the fixed connection protection structure, the shock-resistant vibration structure and the temperature change resistant structure in the long-linear-array densely-arranged optical fiber array protection structure of the embodiment, the precise optical device which is made of the long-linear-array densely-arranged optical fiber array 1 by utilizing the optical cable fiber cores in a densely-arranged manner can be used for image acquisition and transmission in various complex environments, and the expected manufacturing and using requirements are met.

Example 2

As shown in fig. 6, the present embodiment has substantially the same structure as embodiment 1, except that: as an optimized scheme of embodiment 1, the front potting adhesive cylinder is divided into a flange connecting seat 501 and a front potting adhesive body 502, and the flange connecting seat 501 and the front potting adhesive body 502 are connected through threads to form the front potting adhesive cylinder. The structure is more beneficial to the installation of the array fixing frame on the positioning step, and the installation time is reduced.

Example 3

As shown in fig. 7, the present embodiment has substantially the same structure as embodiment 1 or embodiment 2, and is different therefrom in that: in the embodiment, aiming at the fixed connection design of the rear potting cylinder and the optical cable of the long-line array densely-arranged optical fiber array manufactured by three optical cables with large core number, a central block 703 is arranged between a clamping seat 71 and a clamping block 72 at the rear end of the rear potting cylinder, and three grooves 711 are symmetrically arranged along the axial center of the central block; two tooth sockets 721 are arranged on the clamping seat, one tooth socket 721 is arranged on the clamping block, and the optical cable 14 is placed in the tooth sockets 721; the center block separates the optical cables through the grooves in the centers of the three optical cables, the fixture blocks press the upper optical cable, and the fixture blocks and the clamping teeth 7211 on the clamping seat clamp the optical cables, so that the three optical cables form a fixing structure with the cross section in a shape like a Chinese character 'pin'.

Claims

1. A protection architecture of long line row close-packed fiber array which characterized in that: this protection architecture includes the pouring sealant in array mount, a encapsulating section of thick bamboo and the encapsulating section of thick bamboo, its characterized in that: the array fixing frame comprises a supporting block (2), a fiber sticking plate (4) behind the supporting block and two parallel threaded rods (3) fixedly connecting the supporting block (2) and the fiber sticking plate (4); the glue filling cylinder comprises a front glue filling cylinder (5) and a rear glue filling cylinder (7) which are mutually connected; the potting adhesive in the potting adhesive cylinder is divided into solid adhesive (6) and soft adhesive (8), the solid adhesive (6) is adhered to and fixes the relative positions of the array module (11), the array fixing frame and the optical cable (14) and seals the potting adhesive cylinder, the soft adhesive (8) infiltrates and fills all the spaces around the bare optical fiber (12) and the optical fiber (13) in the front potting adhesive cylinder (5) and the rear potting adhesive cylinder (7), and the soft adhesive in the front potting adhesive cylinder (5) and the rear potting adhesive cylinder (7) is connected and communicated with and seals the port of the loose tube (141) in the optical cable (14).

2. The protection structure of the long-line-array densely-arranged optical fiber array according to claim 1, wherein: a connecting flange (51) is arranged outside the front potting adhesive cylinder (5), a positioning step (52) and a pressing ring (9) of the array fixing frame are arranged in the front potting adhesive cylinder (5), and a clamping seat (71) and a clamping block (72) are arranged at the rear end of the rear potting adhesive cylinder (7) and are fixedly connected with an optical cable (14).

3. The protection structure of the long-line-array densely-arranged optical fiber array according to claim 1, wherein: the supporting block (2) in the array fixing frame comprises a bottom block (21) and a pressing block (22) which are connected with each other; a limiting groove (211) with a plane groove bottom is arranged on the bottom block (21), and a limiting step (213) is arranged at the rear end of the groove bottom of the limiting groove (211); the lower part of the pressing block (22) is provided with a limiting head (221) with a lower end face being a plane, and the lower end face of the limiting head (221) and the groove bottom of the limiting groove (211) are parallel to clamp and fix the array module (11).

4. The protection structure of the long-line-array densely-arranged optical fiber array according to claim 1, wherein: the fiber sticking plate (4) in the array fixing frame comprises a bottom plate (41) and a cover plate (42) which are connected with each other; an optical fiber groove (411) is formed in the bottom plate (41), silica gel (401) is arranged in the optical fiber groove (411), and steps (412) are arranged on groove edges on two sides of the optical fiber groove (411); the cover plate (42) is a T-shaped cover plate, and the cover plate (42) is buckled into the optical fiber groove along the steps (412) on the two sides of the optical fiber groove (411) and connected with the bottom plate (41).

5. The protection structure of the long-line-array densely-arranged optical fiber array according to claim 1, wherein: two parallel through connecting holes (413) are formed in the lower portion of the bottom plate (41) of the fiber sticking plate (4) along the axial direction, two threaded rods (12) penetrate through the connecting holes (413) in the lower portion of the bottom plate (41) of the fiber sticking plate (4) and are fixedly connected with the bottom block (21) of the supporting block (2), and nuts (33) are arranged on the threaded rods (3) at the two ends of the connecting holes (413) respectively.

6. The protection structure of the long-line-array densely-arranged optical fiber array according to claim 5, wherein: the bottom of the limit groove (211) on the bottom block (21) of the supporting block (2) fixedly connected with the two threaded rods (12) and the bottom of the optical fiber groove (411) on the bottom plate (41) of the fiber sticking plate (4) are in the same plane.

7. The protection structure of the long-line-array densely-arranged optical fiber array according to claim 1, wherein: the positioning step (52) in the front glue filling cylinder (5) is arranged on the inner side of the front end port of the front glue filling cylinder (5); the rear parts of the bottom block (21) and the pressing block (22) of the supporting block (2) of the array fixing frame are respectively provided with flanges (212) with the same thickness; the pressing ring (9) presses the edge frame (212) to abut against a positioning step (52) in the front glue pouring cylinder (5), the array fixing frame is fixedly connected with the front glue pouring cylinder (5), and the front end face of the supporting block (2) is flush with the front end port of the front glue pouring cylinder (5).

8. The protection structure of the long-line-array densely-arranged optical fiber array according to claim 1, wherein: an internal thread (53) and a first connecting step (54) are arranged in a port at the rear end of the front glue filling cylinder (5), and a second connecting step (74) and a loop thread ring (73) are arranged outside a port at the front end of the rear glue filling cylinder (7); the second connecting step (74) is tightly connected with the first connecting step (54) and fixedly connected with the front glue filling cylinder (5) and the rear glue filling cylinder (7) through a loop thread ring (73).

9. The protection structure of the long-line-array densely-arranged optical fiber array according to claim 2, wherein: a clamping seat (71) at the rear end of the rear glue pouring cylinder (7) is welded with the rear glue pouring cylinder (7) into an integral structure, and semi-annular grooves (711) or tooth grooves (721) corresponding to the number of the optical cables (14) are axially arranged on the clamping seat (71); the clamping block (72) and the clamping seat (71) are arranged oppositely, a semi-annular tooth groove (721) or a groove (711) is correspondingly arranged on the clamping block (72) and the groove (711) or the tooth groove (721) on the clamping seat (71), and clamping teeth (7211) are uniformly distributed on the inner surface of the tooth groove (721) along the axial direction of the tooth groove; the clamping block (72) is connected with the clamping seat (71), and the groove (711) and the tooth groove (721) are used for relatively clamping the rear optical cable (14) of the long-line array densely-arranged optical fiber array.

10. The protection structure of the long-line-array densely-arranged optical fiber array according to claim 1, wherein: the solid glue (6) and the soft glue (8) in the glue filling cylinder are injected for multiple times; the solid glue (6) comprises a first solid glue (61), a second solid glue (62) and a third solid glue (63), and a through channel (621) is axially arranged on the second solid glue (62); the soft glue (8) comprises a first soft glue (81) and a second soft glue (82), the first soft glue (81) and the second soft glue (82) are communicated through a channel (621) formed in the second solid glue (62), and the second soft glue (82) seals the port of the loose tube (141) at the front end of the optical cable (14).