Replaceable multi-core optical fiber feed-through assembly

Abstract

The utility model belongs to the technical field of optical fiber penetration, and particularly relates to a replaceable multi-core optical fiber feed-through assembly which comprises a flange, a plurality of first through holes are formed in the flange, and one end of each first through hole extends outwards in the radial direction to form a second through hole. The number of the threaded rods is consistent with that of the first through holes, each threaded rod is provided with a head part and a tail part, the tail part is provided with threads, and a transversely-through step groove is formed in each threaded rod; the number of the nuts is consistent with that of the first through holes; the number of the glass tubes is consistent with that of the through holes. According to the technical scheme, the optical fiber is assembled in the threaded rod through the glass tube, the tail of the threaded rod penetrates through the second through hole and the first through hole and then is in threaded fit with the nut till no gap exists between the head and the side wall of the second through hole, the nut abuts against the flange, and detachable installation of the optical fiber is achieved; the optical fiber, the glass tube, the threaded rod and the nut form an optical fiber unit, and when the optical fiber is damaged, the corresponding optical fiber unit is taken down and replaced, so that the independent replacement function is realized, the maintenance cost is low, and the maintenance period is short.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical fiber penetration, and particularly relates to a replaceable multi-core optical fiber feedthrough component. Background Technique

[0002] An optical fiber feedthrough component is a device used to achieve the transmission and connection of optical signals in an optical fiber system. Its main function is to transmit optical signals between different parts of the optical fiber system while protecting the optical fiber from the influence of the external environment.

[0003] For the existing optical fiber feedthrough components in the market, there is a problem that if one core is damaged, the whole component needs to be replaced, which causes serious waste.

[0004] In view of the above problems, a replaceable multi-core optical fiber feedthrough component is designed. Content of the Utility Model

[0005] The utility model aims at the problems in the prior art and proposes the following technical solutions:

[0006] A replaceable multi-core optical fiber feedthrough component, comprising:

[0007] A flange, on which a plurality of through holes I are provided, and one end of each through hole I radially expands outwards to form a through hole II;

[0008] Threaded rods with the same number as the through holes I, each threaded rod having a head and a tail, with threads provided on the tail, and a stepped groove penetrating transversely is provided in the threaded rod;

[0009] Nuts with the same number as the through holes I;

[0010] Glass tubes with the same number as the through holes I, the glass tubes are assembled into the stepped grooves and are in contact with the groove walls of the stepped grooves, and optical fibers are embedded inside the glass tubes;

[0011] The tail penetrates through the through hole II and the through hole I and is in threaded cooperation with the nut until there is no gap between the head and the side wall of the through hole II and the nut is in contact with the flange.

[0012] As a preference of the above technical solution, a limiting plane is provided on the inner wall of the through hole II, and a head plane matching the limiting plane is provided on the head.

[0013] As a preference of the above technical solution, an operating plane is provided on the outer wall of the nut.

[0014] As a preference of the above technical solution, a plurality of sealing rings are provided between the threaded rod and the flange.

[0015] As a preference of the above technical solution, one of the sealing rings is provided between the head and the side wall of the through hole II;

[0016] The remaining sealing rings are arranged between the threaded rod and the first through hole, and an annular groove for accommodating the sealing ring is formed on the threaded rod.

[0017] As a preference of the above technical solution, the head end of the stepped groove extends radially outward to form a first cavity, and the tail end of the stepped groove extends radially outward to form a second cavity;

[0018] The inner cavity tail end of the nut extends radially inward to form a protection cavity.

[0019] As a preference of the above technical solution, the glass tube and the optical fiber, and the glass tube and the stepped groove are bonded by epoxy glue.

[0020] The beneficial effects of the present utility model are as follows:

[0021] 1. In a replaceable multi-core optical fiber feedthrough component in the present technical solution, the optical fiber is assembled inside the threaded rod through the glass tube. The tail of the threaded rod passes through the second through hole and the first through hole and is threadedly engaged with the nut until there is no gap between the head and the side wall of the second through hole, and the nut abuts against the flange, realizing the detachable installation of the optical fiber;

[0022] The optical fiber, the glass tube, the threaded rod, and the nut form the minimum unit. When the optical fiber is damaged, the corresponding minimum unit can be removed and replaced, with low maintenance cost and short maintenance cycle.

[0023] 2. In a replaceable multi-core optical fiber feedthrough component in the present technical solution, between the threaded rod and the flange, through the detachable installation of the threaded rod passing through the flange and being threadedly engaged with the nut, the function of separately replacing the minimum unit is realized. The glass tube, the optical fiber, and the stepped groove are fixedly bonded by epoxy glue. While meeting the replacement of the minimum unit, the sealing of the optical fiber is realized, meeting the requirement of leakage rate ≤ 1*E-10 Pa·m 3 / s. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Fig. shows the structural schematic diagram of a replaceable multi-core optical fiber feedthrough component in Embodiment 1;

[0025] Figure 2 Fig. shows the internal structural schematic diagram of a replaceable multi-core optical fiber feedthrough component in Embodiment 1;

[0026] Figure 3 Fig. shows the structural schematic diagram of the flange in Embodiment 1;

[0027] Figure 4 Fig. shows the structural schematic diagram of the threaded rod in Embodiment 1;

[0028] Figure 5Shown is a schematic internal structure diagram of the threaded rod in Embodiment 1;

[0029] Figure 6 Shown is a schematic structure diagram of the nut in Embodiment 1;

[0030] Figure 7 Shown is a schematic internal structure diagram of the nut in Embodiment 1;

[0031] Figure 8 Shown is a schematic assembly diagram of the local structure in Embodiment 1;

[0032] Figure 9 Shown is Figure 8 a schematic internal structure diagram of the local structure in

[0033] Reference numerals: flange 10; first through hole 11; second through hole 12; limiting plane 121;

[0034] threaded rod 20; head 21; head plane 221; tail 22; step groove 23; first cavity 24; second cavity 25; ring groove 26;

[0035] nut 30; protection cavity 31; operation plane 32;

[0036] glass tube 40; optical fiber 41; sealing ring 50. Detailed implementation manners

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments.

[0038] Embodiment 1

[0039] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 shown, a replaceable multi-core optical fiber feedthrough assembly. In this embodiment, the number of the first through holes 11, the threaded rods 20, the nuts 30, and the glass tubes 40 are all set to two, and in other embodiments, they can also be set to three, four, etc., including:

[0040] A flange 10, on which a plurality of first through holes 11 are provided, and one end of the first through hole 11 radially expands outward to form a second through hole 12;

[0041] A threaded rod 20 having the same number as the through holes 11. The threaded rod 20 has a head 21 and a tail 22. Threads are provided on the tail 22, and a stepped groove 23 that penetrates horizontally is provided in the threaded rod 20.

[0042] Nuts 30 having the same number as the through holes 11.

[0043] Glass tubes 40 having the same number as the through holes 11. The glass tubes 40 are assembled into the stepped grooves 23 and are in contact with the groove walls of the stepped grooves 23 to limit the assembly positions of the glass tubes 40. Optical fibers 41 are embedded inside the glass tubes 40, and the optical fibers 41 can be single or multiple.

[0044] In the technical solution of the present replaceable multi-core optical fiber feedthrough assembly, during assembly, the threaded rod 20 with the glass tube 40 and the optical fiber 41 assembled inside is inserted into the flange 10. Specifically, the tail 22 of the threaded rod 20 penetrates through the through hole two 12 and the through hole 11. The nut 30 is in threaded cooperation with the tail 22. The nut 30 is rotated on the tail 22 until there is no gap between the head 21 and the side wall of the through hole two 12 and the nut 30 is in contact with the flange 10. During disassembly, the nut 30 is rotated in the reverse direction until it disengages from the tail 22, and the threaded rod 20 is withdrawn from the flange 10.

[0045] In this technical solution, the optical fiber 41 is assembled inside the threaded rod 20 through the glass tube 40. The tail 22 of the threaded rod 20 penetrates through the through hole two 12 and the through hole 11 and then is in threaded cooperation with the nut 30 until there is no gap between the head 21 and the side wall of the through hole two 12 and the nut 30 is in contact with the flange 10, realizing the detachable installation of the optical fiber 41.

[0046] The optical fiber 41, the glass tube 40, the threaded rod 20, and the nut 30 form the minimum unit. When the optical fiber 41 is damaged, the corresponding minimum unit can be removed and replaced, realizing the function of replacing the minimum unit alone, with low maintenance cost and short maintenance cycle. At the same time, the threaded rod 20 and the nut 30 in the minimum unit are cooperatively arranged and can be reused after the optical fiber 41 and the glass tube 40 are removed.

[0047] To improve the stability of the internal structure of the multi-core optical fiber feedthrough assembly in this embodiment and ensure signal transmission, as Figure 3 、 Figure 4 、 Figure 7 shown, a limiting plane 121 is provided on the inner wall of the through hole two 12, and a head plane 221 matching the limiting plane 121 is provided on the head 21.

[0048] When the threaded rod 20 is assembled into the flange 10, the head 21 is inserted into the interior of the through hole two 12, and the limiting plane 121 matches the head plane 221, preventing the threaded rod 20 from rotating inside the flange 10. That is, the threaded rod 20 and the optical fiber 41 have an anti-rotation function, ensuring the stability of the internal structure of the multi-core optical fiber feedthrough assembly. At the same time, the matching setting of the limiting plane 121 and the head plane 221 has a pre-positioning effect when assembling the threaded rod 20, improving the assembly accuracy.

[0049] To improve the convenience of rotating the nut 30, as Figure 1 , Figure 6 , Figure 7 shown, an operation plane 32 is provided on the outer wall of the nut 30; the setting of the operation plane 32 facilitates using a tool to rotate the nut 30 to achieve the effect of loosening or tightening.

[0050] To ensure the sealing performance of the multi-core optical fiber feedthrough assembly in this embodiment and meet the usage requirements in a vacuum environment, as Figure 2 , Figure 9 shown, a plurality of sealing rings 50 are provided between the threaded rod 20 and the flange 10; in this embodiment, the number of sealing rings 50 is three. The sealing rings 50 fill the gap between the threaded rod 20 and the flange 10, preventing gases, liquids, etc. from passing through, thereby achieving the requirement of ensuring the sealing performance of the multi-core optical fiber feedthrough assembly. At the same time, the use of the sealing ring 50 as the sealing component meets the function of being replaceable.

[0051] More specifically, as Figure 2 , Figure 9 shown, one of the sealing rings 50 is provided between the head 21 and the side wall of the through hole two 12; ensuring the sealing performance between the head 21 and the through hole two 12.

[0052] The remaining sealing rings 50 are provided between the threaded rod 20 and the through hole one 11, and a ring groove 26 for accommodating the sealing ring 50 is provided on the threaded rod 20; ensuring the sealing performance between the threaded rod 20 and the through hole one 11.

[0053] To achieve the mating installation of the multi-core optical fiber feedthrough assembly in this embodiment with the external protective structure, as Figure 5 shown, the head end of the stepped groove 23 radially expands outward to form a cavity one 24, and the tail end of the stepped groove 23 radially expands outward to form a cavity two 25; as Figure 7 shown, the inner cavity tail end of the nut 30 radially extends inward to form a protective cavity 31.

[0054] Among them, the cavity one 24, the cavity two 25, and the protective cavity 31 are coaxially arranged, and the cavity one 24, the cavity two 25, and the protective cavity 31 are used to assemble the external protective structure of the optical fiber 41, meeting the tensile and compressive requirements of the optical fiber 41 during use.

[0055] To further ensure the sealing performance of the multi-core optical fiber feedthrough component in this embodiment and the stability of the internal structure of the multi-core optical fiber feedthrough component in this embodiment, as Figure 2 , Figure 9 shown, between the glass tube 40 and the optical fiber 41, and between the glass tube 40 and the stepped groove 23, they are bonded with epoxy glue. While meeting the replacement of the minimum unit, the sealing of the optical fiber is achieved, meeting the requirement of leakage rate ≤ 1*E-10 Pa·m 3 / s; at the same time, the relative positions of the glass tube 40, the optical fiber 41 and the stepped groove 23 are fixed by epoxy glue bonding in the axial and radial directions, meeting the requirement of the stability of the internal structure of the multi-core optical fiber feedthrough component and ensuring the transmission of signals.

[0056] In a replaceable multi-core optical fiber feedthrough component in this technical solution, between the threaded rod 20 and the flange 10, through the threaded rod 20 passing through the flange 10 and being threadedly engaged with the nut 30 for detachable installation, the function of individually replacing the minimum unit is realized; between the glass tube 40, the optical fiber 41 and the stepped groove 23, they are fixed by epoxy glue bonding. While meeting the replacement of the minimum unit, the sealing of the optical fiber is achieved, meeting the requirement of leakage rate ≤ 1*E-10 Pa·m 3 / s.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.

Claims

1. A replaceable multi-core fiber optic feedthrough component, characterized in that, Comprising: A flange (10), on which a plurality of first through holes (11) are provided, and one end of the first through hole (11) radially extends outward to form a second through hole (12); Threaded rods (20) having the same number as the first through holes (11), the threaded rods (20) having a head (21) and a tail (22), with threads provided on the tail (22), and a transverse through step groove (23) is provided in the threaded rod (20); Nuts (30) having the same number as the first through holes (11); Glass tubes (40) having the same number as the first through holes (11), the glass tubes (40) are assembled into the step groove (23) and are in contact with the groove wall of the step groove (23), and optical fibers (41) are embedded inside the glass tubes (40); The tail (22) passes through the second through hole (12) and the first through hole (11) and is threadedly engaged with the nut (30) until there is no gap between the head (21) and the side wall of the second through hole (12), and the nut (30) is in contact with the flange (10).

2. The replaceable multi-core fiber optic feedthrough component according to claim 1, characterized in that, A limiting plane (121) is provided on the inner wall of the second through hole (12), and a head plane (221) matching the limiting plane (121) is provided on the head (21).

3. The replaceable multi-core fiber optic feedthrough component according to claim 1, characterized in that, An operating plane (32) is provided on the outer wall of the nut (30).

4. A replaceable multi-core fiber optic feedthrough component according to claim 1, characterized in that, A plurality of sealing rings (50) are provided between the threaded rod (20) and the flange (10).

5. The replaceable multi-core fiber optic feedthrough component according to claim 4, characterized in that, One of the sealing rings (50) is provided between the head (21) and the side wall of the second through hole (12); The remaining sealing rings (50) are provided between the threaded rod (20) and the first through hole (11), and a ring groove (26) for accommodating the sealing ring (50) is provided on the threaded rod (20).

6. The replaceable multi-core fiber optic feedthrough component according to claim 1, wherein The head end of the step groove (23) radially extends outward to form a first cavity (24), and the tail end of the step groove (23) radially extends outward to form a second cavity (25); The inner cavity tail end of the nut (30) radially extends inward to form a protection cavity (31).

7. A replaceable multi-core fiber optic feedthrough component according to claim 1, characterized in that Between the glass tube (40) and the optical fiber (41), and between the glass tube (40) and the step groove (23), they are bonded by epoxy glue.

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