Optical fiber penetrating device

Abstract

The utility model relates to the technical field of sealing parts for temperature measurement of transformers, in particular to an optical fiber penetrating device, which mainly structurally comprises a supporting body, an external thread is arranged on the outer side surface of one end of the supporting body, a flange part is arranged at the other end of the supporting body, a rubber ring groove is arranged on the surface, facing the external thread, of the flange part, and a first sealing ring is embedded in the rubber ring groove. The two ends of the supporting body are inwards provided with coaxially-distributed grooves, coaxially-distributed inserting grooves are formed between the grooves in a penetrating mode, and internal threads are arranged at the positions of the grooves. One side of the connecting piece is a thread part, and the other side of the connecting piece is an optical fiber interface; the two connecting pieces can be in threaded connection in the grooves in the two ends through the threaded parts respectively, and a through channel and an optical fiber assembly are axially arranged in each connecting piece; the utility model provides an optical fiber penetrating device, which can effectively meet the requirement of an internal temperature monitoring system of an oil-immersed transformer for transmitting optical signals to the outside.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing components for transformer temperature measurement, and specifically to an optical fiber connector. Background Technology

[0002] Oil-immersed transformers utilize transformer oil for cooling and insulation, and are widely used in various power systems. Oil-immersed transformers offer high cooling efficiency and excellent insulation performance, requiring fiber optic sensors to measure the temperature of their windings, oil level, and other components. During operation, some electrical energy is converted into heat, causing an increase in internal oil and winding temperatures. Overheating of the oil and windings not only reduces insulation performance and accelerates component aging, but also affects service life. Therefore, internal temperature monitoring systems are an indispensable part of the transformer's core components.

[0003] Therefore, the transformer internal temperature monitoring system urgently needs an internal and external connecting device to connect the internal and external optical signal transmission of the transformer in order to achieve the purpose of measuring the internal temperature of the transformer. Moreover, this internal and external connecting device must meet the requirement of no leakage during vacuum oil filling of oil-immersed transformers. Utility Model Content

[0004] Technical problems to be solved

[0005] In view of the above-mentioned shortcomings of the existing technology, this utility model provides an optical fiber connector that can effectively solve the need for external optical signal transmission of the internal temperature monitoring system of oil-immersed transformer.

[0006] Technical solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] This utility model provides an optical fiber connector, which is fixed at the optical fiber channel reserved in the transformer in actual use to connect the internal and external optical paths of the transformer. The main structure of the optical fiber connector of this solution includes a support body, which has an external thread on the outer side of one end and a flange at the other end. The flange has a rubber ring groove on the surface facing the external thread, and a first sealing ring is embedded in the rubber ring groove. The two ends of the support body have coaxially distributed grooves, and coaxially distributed insertion grooves pass through the grooves. The grooves are provided with internal threads.

[0009] The connector has a threaded portion on one side and an optical fiber interface on the other side; the two connectors can be threaded into the grooves at both ends through the threaded portion, and the connector has an axially penetrating channel inside.

[0010] The fiber optic assembly includes two symmetrically distributed ferrules, each ferrule having an axially arranged through hole. An optical fiber is coaxially fixed between the through holes. The inner ends of the ferrules are fitted into the insertion slot with a gap, and their outer ends are fitted and fixed into the channel. The gap between the ferrule and the insertion slot is filled with a cured adhesive, and a second sealing ring is provided at one end of the insertion slot.

[0011] Furthermore, the groove is a stepped groove, which includes a first groove and a second groove from the outside to the inside. The inner diameters of the first groove, the second groove and the insertion groove decrease step by step, and the internal thread is provided in the first groove.

[0012] Furthermore, one side of the second groove is a long groove with a larger length value, and the other side is a short groove with a smaller length value. After the connector is screwed into place in the first groove, its end face extends into the short groove to press the second sealing ring.

[0013] Furthermore, the main body of the insert is a hollow cylinder, and the outside of the insert is provided with a shoulder portion. The shoulder portion is fitted with the insertion groove with a clearance, and its relative outer end face contacts the end face of the connector.

[0014] Furthermore, the optical fiber is fixed inside the two ferrules by photocuring adhesive.

[0015] Furthermore, the fiber optic interface is an ST-type flange interface.

[0016] Furthermore, a pair of nuts are threaded onto the external thread of the support body.

[0017] Furthermore, the threaded portion of the connector is coated with anaerobic adhesive at the threaded connection within the groove.

[0018] Beneficial effects

[0019] The technical solution provided by this utility model has the following advantages compared with the known public technology:

[0020] This utility model, through the modular structural design of the fiber optic connector, firstly ensures stable transmission of fiber optic signals by fixing the fiber optic body to two symmetrically distributed ferrules using fiber optic fixtures, then assembling the fiber optic assembly into the support body, and finally ensuring the coaxiality of the fiber optic cable by precisely fitting the outer end of the ferrule within the connector channel, thus ensuring the quality of fiber optic signal transmission.

[0021] Secondly, this product ensures a sealed connection between the main body of the connector and the transformer housing by providing a first sealing ring installed in the groove on the support body. The design of filling the gap between the core body and the insertion groove with cured adhesive by using a second sealing ring prevents oil leakage from the connection of the core body. The combined sealing structure ensures that the connector can maintain a long-term seal in a vacuum oil injection environment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a perspective view of the overall structure of the optical fiber connector of this utility model;

[0024] Figure 2 This is a full sectional view of the optical fiber connector of this utility model.

[0025] Figure 3 This is a schematic diagram of the optical fiber assembly of this utility model fitting together within the support body;

[0026] Figure 4 This is a perspective view of the connector of this utility model;

[0027] Figure 5 This is a schematic diagram of the optical fiber assembly of this utility model;

[0028] The labels in the diagram represent: 10, support body; 11, external thread; 12, rubber ring groove; 13, groove; 14, insertion slot; 15, flange; 131, first groove; 132, second groove; 20, connector; 21, threaded part; 22, fiber optic interface; 23, channel; 30, fiber optic assembly; 31, ferrule; 32, fiber optic body; 33, through hole; 34, shoulder; 40, first sealing ring; 50, second sealing ring; 60, cured adhesive; 70, nut. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] The present invention will be further described below with reference to the embodiments.

[0031] Example:

[0032] This utility model provides an optical fiber connector, which is fixed at the reserved optical fiber channel 23 of the transformer in actual use to connect the internal and external optical paths of the transformer. That is, when the optical fiber temperature sensor directly monitors the internal temperature of the oil-immersed transformer, the optical fiber temperature sensor transmits the optical signal to the outside of the transformer through this product to complete the acquisition of temperature monitoring data.

[0033] Reference Figure 1-5 The main structure of the fiber optic connector in this solution includes a support body 10 that provides support and is installed on the transformer. The main body of the support body 10 is a cylindrical steel piece. One end of the outer surface is provided with an external thread 11, and the other end is provided with a flange 15. The surface of the flange 15 facing the external thread 11 is provided with a rubber ring groove 12. The rubber ring groove 12 is embedded with a first sealing ring 40. When the fiber optic connector is installed and fixed on the transformer, a pair of hexagonal nuts 70 are threaded to the external thread 11 of the support body 10, and the flange 15 is used to limit the connection and fixation of the two.

[0034] It also includes two connectors 20 located at both ends of the support body 10, one side of which has a threaded portion 21 and the other side has an optical fiber interface 22; wherein, coaxially distributed grooves 13 are formed inward at both ends of the support body 10, and coaxially distributed insertion slots 14 pass through the grooves 13, and internal threads are provided at the grooves 13; the two connectors 20 can be threaded into the grooves 13 at both ends through the threaded portions 21, so as to realize the combination assembly of the connectors 20 at both ends of the support body 10. The connectors 20 have axially penetrating channels 23 inside;

[0035] It also includes an optical fiber assembly 30 for connecting internal and external optical paths. The optical fiber assembly 30 includes two symmetrically distributed ceramic ferrules 31. The ferrules 31 have through holes 33 axially arranged inside. An optical fiber body 32 is coaxially fixed between the through holes 33. In the fixing operation between the two ferrules 31, a special optical fiber tooling is used to keep the optical fiber precisely aligned and prevent displacement or misalignment.

[0036] The inner end of the ferrule 31 is fitted with a gap in the insertion slot 14, that is, the main body of the fiber optic assembly 30 is fitted with a gap in the insertion slot 14, and its outer end is fitted into the channel 23 of the connector 20.

[0037] The gap between the insert body 31 and the insertion groove 14 is filled with cured adhesive 60, and a second sealing ring 50 is provided at one end of the insertion groove 14.

[0038] The assembly process of the fiber optic assembly 30 and the two connectors 20 inside the support body 10 is as follows: First, insert the assembled fiber optic assembly 30 into the insertion slot 14, and fit the second sealing ring 50 onto the ferrule 31 on one side; then, install the connector 20 on the side with the second sealing ring 50. After the threaded part 21 of the connector 20 is rotated into place in the groove 13, its end face presses against the second sealing ring 50 to achieve a seal; then, apply adhesive through the groove 13 on the other side to fill the gap between the ferrule 31 and the insertion slot 14; finally, thread the remaining connectors 20 together. Of course, during assembly, pay attention to the insertion fit between the outer end of the ferrule 31 and the channel 23 of the connector 20.

[0039] This product employs a modular structural design for the fiber optic connector. First, to ensure stable transmission of fiber optic signals, the fiber optic body 32 is fixed within two symmetrically distributed ferrules 31 using fiber optic fixtures. Then, the fiber optic assembly 30 is assembled into the support body 10. Finally, the precise fit between the outer end of the ferrule 31 and the channel 23 of the connector 20 ensures fiber coaxiality and guarantees the quality of fiber optic signal transmission.

[0040] Secondly, this product ensures that the main body of the connector is sealed at the installation point on the transformer housing by providing a first sealing ring 40 installed in the rubber ring groove 12 on the support body 10. The design of filling the gap between the core body 31 and the insertion groove 14 with cured glue by using a second sealing ring 50 prevents oil from leaking from the connection of the core body 31. The combined sealing structure ensures that the connector can maintain a long-term seal in a vacuum oil injection environment.

[0041] The following is a description of the preferred implementation method of this product:

[0042] In order to accommodate the shape of one end of the threaded part 21 of the connector 20, the groove 13 of the support body 10 is designed as a stepped groove, and the stepped groove includes a first groove 131 and a second groove 132 from the outside to the inside. The inner diameters of the first groove 131, the second groove 132 and the insertion groove 14 decrease step by step. The first groove 131 is provided with an internal thread to realize the threaded connection with the connector 20.

[0043] To ensure the sealing of the second sealing ring 50 and the efficient operation of the curing adhesive filling process, the second groove 132 is designed with a long groove on one side and a short groove on the other side. After the connector 20 is screwed into place in the first groove 131 on one side of the short groove, its end face extends into the short groove to press the second sealing ring 50. The long groove can reserve a certain gap space as redundant space for filling adhesive, which facilitates the dispensing operation.

[0044] The connectors 20 on both sides limit and fix the fiber optic assembly 30 within the insertion slot 14. The main body of the ferrule 31 is a hollow cylinder, and the ferrule 31 has a shoulder 34 on its outside. The shoulder 34 fits loosely within the insertion slot 14, and its outer end face contacts the end face of the connector 20. To enhance the stability of the fiber and prevent loosening or detachment due to long-term operation, the fiber body 32 is fixed inside the two ferrules 31 using photocurable adhesive. Ensuring that the fiber optic assembly 30 is manufactured as a single piece before assembly within the support body 10 makes the product more reliable.

[0045] In addition, in this embodiment, the fiber optic interface 22 of the connector 20 is preferably an ST-type flange interface. When connecting to the ST interface corresponding to the external component, the connection is tightened by rotating the knob on the interface, which is relatively simple to operate. The ST interface ensures tight contact between the optical fibers through its internal spring loading mechanism. When two ST interfaces are mated, the built-in spring pushes the fiber optic pin, so that the end faces of the fiber bodies 32 are tightly attached, thereby realizing the effective transmission of optical fiber signals.

[0046] The first sealing ring 40 and the second sealing ring 50 are both made of high-performance rubber, which can withstand the high-voltage oil immersion environment during transformer operation and maintain long-term sealing performance. Preferably, anaerobic adhesive is applied to the threaded connection of the threaded portion 21 of the connector 20 within the groove 13. The threaded connection of the connector 20 fits tightly with the main body of the support 10, and the anaerobic adhesive further ensures that no leakage occurs during vacuum oil filling.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fiber optic ferrule, comprising: The utility model provides a kind of optical fiber connector, including: Support, the outer side of one end is provided with external thread, the other end is provided with flange part, the flange part is provided with rubber ring groove on the surface towards the external thread, the first sealing ring is embedded in the rubber ring groove, the recess is formed coaxially in the support two ends, the plug-in slot is penetrated between the recess, the recess is provided with internal thread; Connecting piece, one side is threaded part, the other side is optical fiber interface;Two connecting pieces can be screwed in the recess of two ends respectively by threaded part, the inside of connecting piece is provided with through channel axially; Optical fiber assembly, including two symmetrically distributed ferrules, the inside of ferrule is provided with through hole axially, the through hole is coaxially fixed with optical fiber body between the through hole, the opposite inner end of ferrule is fitted in the plug-in slot, and the outer end is fitted and fixed in the channel; Wherein, the gap between the ferrule and the plug-in slot is filled with solidified glue, and the second sealing ring is arranged at the slot opening of the plug-in slot.

2. An optical fiber pass-through according to claim 1, wherein, The recess is a stepped groove, which includes a first groove body and a second groove body from outside to inside, the inner diameters of the first groove body, the second groove body and the plug-in slot gradually decrease, and the first groove body is provided with the internal thread.

3. A fiber optic poke-through according to claim 2, wherein, The second groove body is a long groove body with a large length value on one side and a short groove body with a small length value on the other side, and the end face of the connecting piece is inserted into the short groove body to compress the second sealing ring after being screwed into the first groove body.

4. The fiber optic conduit of claim 1, wherein, The main body of the ferrule is a hollow cylinder, the outer part of the ferrule is provided with a shoulder part, the shoulder part is fitted in the plug-in slot, and the opposite outer end face contacts the end face of the connecting piece.

5. A fiber optic poke-through according to either of claims 1 or 4, wherein, The optical fiber body is fixed in the inside of two ferrules by light-cured glue.

6. The fiber optic conduit of claim 1, wherein, The optical fiber interface is an ST type flange interface.

7. The fiber optic conduit of claim 1, wherein, The support is screwed with a pair of nuts at the external thread.

8. The fiber optic conduit of claim 1, wherein, The threaded part of the connecting piece is coated with anaerobic glue at the threaded connection in the recess.

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