Tail fiber for testing prefabricated optical cable

Abstract

The utility model relates to the field of communication optical fibers, in particular to a tail fiber for prefabricated optical cable testing, which comprises a connector, an optical fiber, a heat-shrinkable sleeve and a thin tube, a wire passing hole is arranged in the connector in a penetrating manner, the optical fiber is arranged in the connector in a penetrating manner through the wire passing hole, and the heat-shrinkable sleeve is sleeved on the optical fiber; a containing groove is formed in the head end of the connector, the optical fiber is sleeved with the heat-shrinkable sleeve, the heat-shrinkable sleeve is located in the containing groove and part of the wire passing hole, and the part, located in the wire passing hole, of the heat-shrinkable sleeve is provided with a connecting part; the thin pipe is arranged in the containing groove in a sleeved mode and used for abutting against the connecting part and the connector. According to the optical fiber connector, the optical fiber can be well fixed with the connector, the fixing structure is relatively simple, a glue pasting and fixing mode can be avoided as much as possible, and secondary connection / welding can be carried out by adjusting the positions of the optical fiber and the connector after the first connection / welding of the connector and an optical device fails.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber communication technology, specifically to a pigtail for testing prefabricated optical cables. Background Technology

[0002] A pigtail, also known as a tail wire, has a connector at one end and a broken end of an optical fiber core at the other end. It is connected to other optical fiber cores by fusion splicing. It is often found in fiber optic terminal boxes and is used to connect optical cables to optical transceivers (couplers, patch cords, etc. are also used between them).

[0003] However, many fiber optic pigtails now have no flexible tail sleeve, leaving the pigtail in direct, rigid contact with the connector. This affects the fiber's resistance to lateral tension, making it prone to damage or even breakage during use, which is detrimental to stable signal transmission. Utility Model Content

[0004] The purpose of this invention is to provide a pigtail for testing prefabricated optical cables to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A pre-fabricated optical cable test pigtail includes:

[0007] The connector has a through-hole for wires.

[0008] The optical fiber is inserted into the connector through a through-hole and is fitted with a heat-shrink tubing.

[0009] The connector has a receiving groove at its first end, and the receiving groove is connected to the wire hole;

[0010] A heat shrink tubing, wherein the heat shrink tubing is sleeved on an optical fiber and is located in a receiving groove and a portion of a cable passage hole, and the portion of the heat shrink tubing located in the cable passage hole has a connecting part.

[0011] A thin tube, which is fitted inside the receiving groove and is used to abut the connecting part against the connecting head.

[0012] Furthermore, the connecting part includes an annular sleeve, which is fitted onto the heat shrink tubing, and the thin tube is used to press the annular sleeve against the connector.

[0013] Furthermore, the heat shrink tubing has an annular groove for receiving the annular sleeve.

[0014] Furthermore, the tail end of the thin tube has a groove for accommodating the heat shrink tubing, and the outer side of the groove is a clamping end for clamping the annular sleeve.

[0015] Furthermore, the diameter of the annular sleeve is the same as or slightly smaller than the diameter of the receiving groove.

[0016] Furthermore, the tail end of the connector has a stopcock for securing the heat shrink tubing to the connector.

[0017] Furthermore, the stopcock is conical and matches the tail end of the wire passage hole, and the wire passage hole at the tail end has a smooth wall near the inside, and the stopcock has a rubber ring that contacts the smooth wall.

[0018] Furthermore, a sealing portion is provided between the annular sleeve and the connector.

[0019] Furthermore, the sealing part includes an annular protrusion on the annular sleeve and an annular groove on the connector, wherein the annular protrusion is located within the annular groove.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention, through the use of heat-shrink tubing, protects the optical fiber from internal stress and external lateral pressure, reducing the likelihood of fiber damage. The stopcock and rubber ring not only secure the heat-shrink tubing but also act as stress buffers when the fiber is subjected to lateral tension, improving the fiber optic pigtail's resistance to lateral tension, reducing the risk of fiber breakage during use, and ultimately enhancing signal transmission stability.

[0022] This invention uses a stopcock and rubber ring to clamp the heat shrink tubing, and the abutting end to press the annular sleeve against the inner wall of the connector. This not only achieves good fixation of the optical fiber to the connector, but also has a relatively simple fixing structure. Furthermore, it can minimize the use of glue for fixing, making it easier to perform a secondary connection / fusion after the initial connection / fusion between the connector and the optical device fails by adjusting the position of the optical fiber and the connector. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is an exploded structural diagram of the present invention.

[0025] Figure 3 This utility model Figure 2 Another perspective structural diagram.

[0026] Figure 4 This utility model Figure 1 A cross-sectional schematic diagram of AA.

[0027] Figure 5 This utility model Figure 4 Another structural diagram.

[0028] Figure 6 This utility model Figure 5 A schematic diagram of the specific structure at point A.

[0029] In the diagram: 1-Connector, 2-Fiber optic cable, 3-Heat shrink tubing, 4-Plug, 5-Notch, 6-Thin tube, 7-Annular sleeve, 8-Annular groove, 9-Rubber ring, 10-Smooth wall, 11-Groove, 12-Firming end, 13-Annular protrusion, 14-Annular groove, 15-Gap, 16-Wire hole, 17-Accommodation groove. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be noted that the terms "upper end," "lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Example 1

[0034] Please see Figures 1 to 4 This utility model provides a technical solution:

[0035] The application of prefabricated optical cables in smart substations primarily enhances the reliability, transmission efficiency, and system stability of the communication networks for intelligent substation equipment. Smart substations integrate advanced information technology, automation technology, and sensing technology for real-time monitoring and intelligent dispatching. In this high-tech environment, prefabricated optical cables play a crucial role as efficient communication infrastructure.

[0036] The production process of prefabricated optical cables is standardized and the technology is mature. It can greatly reduce the time for on-site construction and splicing of optical cables, and reduce labor costs. Compared with traditional optical cables, prefabricated optical cables can provide a simpler and more efficient wiring method, reducing the complexity and cost of smart substation construction and operation and maintenance.

[0037] A pre-fabricated optical fiber test pigtail for use in smart substations includes:

[0038] Connector 1, wherein a through hole 16 is provided inside the connector 1.

[0039] Optical fiber 2, which is inserted into the connector 1 through the wire hole 16, and a heat shrink tubing 3 is fitted on the optical fiber 2.

[0040] The connector 1 has a receiving groove 17 at its first end, and the receiving groove 17 is connected to the wire hole 16.

[0041] Heat shrink tubing 3 is sleeved on optical fiber 2 and is located in receiving groove 17 and part of wire passage hole 16. The part of heat shrink tubing 3 located in wire passage hole 16 has a connecting part.

[0042] The thin tube 6 is fitted inside the receiving groove 17 and is used to abut the connecting part and the connecting head 1.

[0043] Specifically, the connecting part includes an annular sleeve 7, which is fitted onto the heat shrink tubing 3, and the thin tube 6 is used to press the annular sleeve 7 against the connector 1. The heat shrink tubing 3 has an annular groove 8 for receiving the annular sleeve 7.

[0044] The connector 1 facilitates the alignment and installation of the optical fiber 2 with optical devices. During use, in order to ensure the reliability of the pigtail itself, a heat shrink tubing 3 is also fitted on the optical fiber 2. The heat shrink tubing 3 is usually made of polypropylene or nylon and is used to protect the optical fiber 2 from internal stress and external side pressure, reducing the chance of damage to the optical fiber 2.

[0045] The annular sleeve 7 and the heat shrink tubing 3 can be integrated, or the annular sleeve 7 can be first fitted onto the heat shrink tubing 3, then glued together and fixed into one piece. The annular sleeve 7 can be housed within the annular groove 8, such as... Figure 4As shown, after the optical fiber 2 and heat shrink tubing 3 are inserted into the connector 1, the annular sleeve 7 can pop out from the annular groove 8. To ensure that the annular sleeve 7 can pop out from the annular groove 8, the annular sleeve 7 and the heat shrink tubing 3 are preferably made of elastic polypropylene.

[0046] Specifically, the tail end of the thin tube 6 has a groove 11 for accommodating the heat shrink tubing 3, and the outer side of the groove 11 is a clamping end 12 for clamping the annular sleeve 7.

[0047] like Figure 4 As shown, when the optical fiber 2 and the heat shrink tubing 3 are inserted into the connector 1, the groove 11 ensures that the head end of the heat shrink tubing 3 can be kept within the groove 11. This ensures that after the thin tube 6 is fully inserted into the receiving groove 17, the pressing end 12 can press the annular sleeve 7 against the inner wall of the connector 1, and the thin tube 6 will not push the heat shrink tubing 3 during the pressing process, thus avoiding the problem of displacement of the heat shrink tubing 3 and its optical fiber 2.

[0048] To ensure that the thin tube 6 can be smoothly inserted into the receiving groove 17 without affecting the heat shrink tubing 3 and the optical fiber 2, in this embodiment, there is a certain gap 15 between the groove 11 and the heat shrink tubing 3. The wire hole 16, the receiving groove 17, and the groove 11 are all located at the center of the connector 1 and are on the same axis.

[0049] In this embodiment, the thin tube 6 has a through groove for the optical fiber 2 to pass through. Since the tail end of the thin tube 6 has a groove 11, it can play a guiding role during the insertion of the optical fiber 2 and the thin tube 6, which is conducive to the smooth insertion of the thin tube 6 and reduces the difficulty of operation.

[0050] Specifically, the diameter of the annular sleeve 7 is the same as or slightly smaller than the diameter of the receiving groove 17. In this embodiment, it is optimal that the diameter of the annular sleeve 7 is slightly smaller than the diameter of the receiving groove 17, because this facilitates the opening of the annular sleeve 7, thereby achieving a tight fit against the inner wall of the connector 1. By creating a groove 11 at the beginning of the heat shrink sleeve 3, a clamping end 12 is formed at the end.

[0051] In this embodiment, as Figure 3 and Figure 4 As shown, the thin tube 6 and the receiving groove 17 are fixed by a threaded connection a, that is, the thin tube 6 is inserted into the receiving groove 17 by screwing.

[0052] Specifically, the tail end of the connector 1 has a stopcock 4, which is used to fasten the heat shrink tubing 3 to the connector 1.

[0053] In this embodiment, the end of the connector 1 with the receiving groove 17 faces outward from the optical device. Through the preset receiving groove 17, after the optical fiber 2 passes through the cable hole 16, the heat shrink tubing 3 is located in the receiving groove 17 and part of the cable hole 16, and is protected by the plug 4 inserted in the receiving groove 17. When the optical fiber 2 is subjected to lateral tension, it is flexibly buffered by the plug 4, which helps to maximize the lateral tension resistance of the optical fiber 2 and reduce the risk of fiber breakage during use.

[0054] Specifically, the stopcock 4 is conical and matches the tail end of the wire hole 16, and the wire hole 16 at the tail end has a smooth wall 10 near the inside, and the stopcock 4 has a rubber ring 9 that contacts the smooth wall 10.

[0055] In this implementation, such as Figure 3 and Figure 4 As shown, the wire passage hole 16 at the tail end of connector 1 is conical, and the opening gradually increases in size from the inside to the outside. The plug 4 is fixed to the wire passage hole 16 by a threaded connection a, that is, the plug 4 is inserted into the wire passage hole 16 by screwing. At the same time, since the wire passage hole 16 has a smooth wall 10 near the inside, and the end of the plug 4 has a rubber ring 9, the plug 4 can be locked onto connector 1 by the continuous sliding action of the rubber ring 9 against the smooth wall 10 during the screwing process.

[0056] In this embodiment, the diameter of the rubber ring 9 is slightly larger than the minimum diameter of the wire passage hole 16. Preferably, the diameter of the rubber ring 9 can be 1.1 to 1.2 times the minimum diameter of the wire passage hole 16. As the diameter of the continuously smooth wall 10 gradually decreases inward, the rubber ring 9 can be squeezed, thereby squeezing the heat shrink tubing 3 and ultimately securing the heat shrink tubing 3 and the optical fiber 2. Because the diameter of the rubber ring 9 is slightly larger than the minimum diameter of the wire passage hole 16, the rubber ring 9 has a certain degree of elasticity, which allows for securing the heat shrink tubing 3 and the optical fiber 2 without causing damage due to excessive squeezing.

[0057] In this implementation, the heat-shrink tubing 3 protects the optical fiber 2 from internal stress and external lateral pressure, reducing the likelihood of damage. The stopcock 4 and the rubber ring 9 not only fix the heat-shrink tubing 3 but also act as stress buffers when the optical fiber 2 is subjected to lateral tension, improving the lateral tensile strength of the optical fiber 2 pigtail, reducing the risk of fiber breakage during use, and thus enhancing the stability of signal transmission.

[0058] Meanwhile, since the stopcock 4 is fixed to the connector 1 by a threaded connection a, if the initial connection / fusion between the connector and the optical device fails, the thin tube 6 and the stopcock 4 can be loosened from the connector 1. This allows the heat shrink tubing 3 and the optical fiber 2 to be removed. The heat shrink tubing 3 can be peeled off from the optical fiber 2 and replaced or reapplied. Heat can soften the heat shrink tubing, thereby readjusting the position of the optical fiber 2 on the heat shrink tubing 3. The optical fiber 2 can then be recut to the desired length and fixed inside the connector 1, thus achieving a secondary connection / fusion with the optical device.

[0059] In this embodiment, the valve 4 and the rubber ring 9 are made of UV adhesive, silicone, or rubber, etc. The connector 1 and the thin tube 6 can be made of copper, iron, aluminum, or other metal alloys, depending on the application environment.

[0060] In this embodiment, both the stopcock 4 and the thin tube 6 have a notch 5, which is easy to squeeze by hand, thereby facilitating the rotation between the stopcock 4 and the thin tube 6 and the connector 1, and thus enabling the assembly and disassembly of the stopcock 4 and the thin tube 6 and the connector 1.

[0061] By clamping the heat shrink tubing 3 with the stopcock 4 and the rubber ring 9, and by pressing the annular sleeve 7 of the abutting end 12 against the inner wall of the connector 1, the optical fiber 2 can be well fixed to the connector 1. The fixing structure is relatively simple, and the use of glue is avoided as much as possible. This makes it easy to perform a secondary connection / fusion after the initial connection / fusion between the connector and the optical device fails, by adjusting the position of the optical fiber 2 and the connector 1.

[0062] Example 2

[0063] Please see Figures 5 to 6 This utility model provides a technical solution that is basically the same as that in Embodiment 1, with the following slight differences:

[0064] The annular sleeve 7 and the connector 1 have a sealing portion. The sealing portion includes an annular protrusion 13 on the annular sleeve 7 and an annular groove 14 on the connector 1, wherein the annular protrusion 13 is located within the annular groove 14.

[0065] In this embodiment, after the thin tube 6 is fully inserted into the receiving groove 17, the pressing end 12 can press the annular sleeve 7 against the inner wall of the connector 1. In order to better achieve the purpose of sealing, moisture-proofing and dustproofing of the connector 1, in this embodiment, the annular protrusion 13 cooperates with the annular groove 14, and the rubber ring 9 is used to fasten the heat shrink sleeve 3, thereby achieving the sealing of the groove 11 and the wire hole 16.

[0066] The optical device of this invention includes the pigtail fiber described in the foregoing embodiments. For example, the optical device can be a pigtail free space isolator (PFSI) or a laser, etc. This optical device has the same structure and beneficial effects as the pigtail fiber described in the foregoing embodiments. The structure and beneficial effects of the pigtail fiber have been described in detail in the foregoing embodiments and will not be repeated here.

[0067] The parts of this utility model not described are existing technologies.

[0068] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pigtail for testing a preform optical cable, characterized by, include: Connector (1), wherein a wire hole (16) is provided through the connector (1). Optical fiber (2), the optical fiber (2) is inserted into the connector (1) through the wire hole (16), and a heat shrink sleeve (3) is fitted on the optical fiber (2). The connector (1) has a receiving groove (17) at its first end, and the receiving groove (17) is connected to the wire hole (16); Heat shrink tubing (3), the heat shrink tubing (3) is sleeved on the optical fiber (2), and the heat shrink tubing (3) is located in the receiving groove (17) and part of the wire hole (16), the part of the heat shrink tubing (3) located in the wire hole (16) has a connecting part; A thin tube (6) is fitted inside a receiving groove (17) and is used to press the connecting part against the connecting head (1).

2. A pigtail for testing a preform optical cable as claimed in claim 1, wherein, The connecting part includes an annular sleeve (7), which is fitted onto the heat shrink tubing (3), and the thin tube (6) is used to press the annular sleeve (7) against the connector (1).

3. A pigtail for testing a preform optical cable as claimed in claim 2, wherein, The heat shrink tubing (3) has an annular groove (8) for receiving the annular sleeve (7).

4. A pigtail for testing a preform optical cable as recited in claim 2, wherein The tail end of the thin tube (6) has a groove (11) for accommodating the heat shrink sleeve (3), and the outer side of the groove (11) is a clamping end (12) for clamping the annular sleeve (7).

5. A pigtail for testing a preform optical cable as recited in claim 1, wherein The diameter of the annular sleeve (7) is the same as or slightly smaller than the diameter of the receiving groove (17).

6. A pigtail for testing a preform optical cable as recited in claim 1, wherein The connector (1) has a stopcock (4) at its tail end, which is used to fasten the heat shrink tubing (3) to the connector (1).

7. A pigtail for testing a preform optical cable as claimed in claim 6, wherein, The plug (4) is conical and matches the tail end of the wire hole (16), and the wire hole (16) at the tail end has a smooth wall (10) near the inside. The plug (4) has a rubber ring (9) that contacts the smooth wall (10).

8. A pigtail tested for a preform optical cable according to claim 2, wherein, The annular sleeve (7) and the connector (1) have a sealing part.

9. A pigtail tested for a preform optical cable according to claim 8, wherein, The sealing part includes an annular protrusion (13) on the annular sleeve (7) and an annular groove (14) on the connector (1), wherein the annular protrusion (13) is located in the annular groove (14).

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