An optical fiber sheath threading assisting device

Abstract

The utility model provides an auxiliary device is worn to optical fiber sheath, relates to optical fiber wiring and protection technical field, including the threading main part and locking assembly, the threading channel is opened in the threading main part, one end of threading main part is fixedly connected with the auxiliary threading drum, the auxiliary threading drum is equipped in one end for sheath one end of the threading channel sets, one end of locking assembly is fixed with threading main part, the other end is used for locking sheath on the auxiliary threading drum, the threading main part is located one side of threading channel still opened with gas cavity, the cylinder wall of auxiliary threading drum is opened with the air inlet hole along the axial direction, one end of gas cavity is connected air compressor through the joint, the other end is connected with air inlet hole through the air inlet channel. Through gas cavity, air inlet channel and auxiliary threading drum air inlet hole form continuous gas path channel, and the gas is inhaled to sheath to form gas film, realizes the stable, low loss insertion of optical fiber.

Description

Technical Field

[0001] This utility model relates to the field of fiber optic cabling and protection technology, and more specifically, it relates to an auxiliary device for fiber optic sheath installation. Background Technology

[0002] Traditional fiber installation methods often rely on manual operations of "pulling" or "pushing" fibers, but they have significant drawbacks: First, optical fibers are highly brittle and are prone to breakage or slight bending due to uneven force during pulling or pushing, affecting signal transmission performance; second, the frictional resistance between the inner wall of the sheath and the optical fiber is high, resulting in low installation efficiency, especially in long-distance cabling scenarios, which is time-consuming and labor-intensive; third, friction and jamming can easily occur between the sheath and the optical fiber, further increasing the risk of fiber damage; and fourth, traditional methods are difficult to adapt to multi-core optical fiber or high-curvature cabling scenarios, significantly increasing the difficulty of operation.

[0003] To address the aforementioned issues, existing technologies have been improved. For example, patent CN114019634A discloses a "blowing positive pressure expansion" method, which expands the sheath by introducing gas into it to form an air film, thereby reducing the frictional resistance between the optical fiber and the inner wall of the sheath. Patent CN107797206B proposes an "expansion-type sheath end snap-fit ​​structure" to assist in optical fiber insertion in conjunction with the mounting base.

[0004] However, existing technologies still have room for improvement: on the one hand, the equipment lacks integration, with air blowing components and fixing structures often being scattered, leading to complex operation procedures; on the other hand, its versatility is limited, making it difficult to adapt to different sheath specifications and limiting its adaptability to various cabling scenarios; furthermore, the installation stability at the sheath ends is poor, easily leading to gas leakage or sheath displacement due to insecure fixing, affecting the installation effect and fiber protection performance. Therefore, there is an urgent need for a highly integrated, versatile, and stable fiber optic sheath installation auxiliary device to further improve cabling efficiency and reduce the risk of fiber damage. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an auxiliary device for fiber optic sheath installation, which solves the problem of fiber optic installation efficiency.

[0006] To achieve the above objectives, this utility model proposes a simple, portable, and easy-to-install fiber optic sheath laying auxiliary device. Through positive pressure expansion of the sheath combined with a mechanical guiding structure, it achieves stable and low-loss insertion of the optical fiber, suitable for use in prefabricated pipes, walls, or equipment slots. The specific technical solution is as follows:

[0007] This utility model discloses an auxiliary device for fiber optic sheath installation, comprising a threading body and a locking assembly. The threading body has a threading channel inside, and an auxiliary threading cylinder is fixedly connected to one end of the threading body. The auxiliary threading cylinder is located at one end of the threading channel for one end of the sheath to be fitted. One end of the locking assembly is fixed to the threading body, and the other end is used to lock the sheath onto the auxiliary threading cylinder. An air source chamber is also provided on one side of the threading channel on the threading body. An air inlet is axially penetrated in the cylinder wall of the auxiliary threading cylinder. One end of the air source chamber is connected to an air compressor through a connector, and the other end is connected to the air inlet through an air inlet channel.

[0008] According to one embodiment of the present invention, the threading body is composed of two semi-circular first threading blocks and second threading blocks with the same structure spliced ​​together. The threading channel is split and arranged on the first threading block and the second threading block. The first threading block and the second threading block are each provided with an air source cavity and each is provided with a connector and an air inlet channel connected to their respective air source cavities.

[0009] According to one embodiment of the present invention, the auxiliary threading cylinder is provided with an air inlet hole that is connected to two air inlet channels respectively, one end of the auxiliary threading cylinder is provided with an annular locking block, and the threading channel is provided with an annular locking groove that is adapted to the annular locking block.

[0010] According to one embodiment of the present invention, a sealing ring is further provided in the annular groove. The sealing ring is used for airtight connection between the air intake channel and the air intake hole. An air groove is provided on the sealing ring for connecting the air intake channel and the air intake hole.

[0011] According to one embodiment of the present invention, the annular card block has a notch, and the annular card groove has a positioning post corresponding to the notch on its circumferential inner wall.

[0012] According to one embodiment of the present invention, the locking assembly includes a fixed cylinder, and a mounting cylinder that is threaded to one end of the fixed cylinder is provided on the opening of the threading body at one end of the threading channel. The other end of the fixed cylinder is provided with a petal-shaped tightening opening. One end of the auxiliary threading cylinder extends into the tightening opening. A nut sleeve is threaded on the fixed cylinder. Rotating the nut sleeve opens or closes the tightening opening.

[0013] According to one embodiment of the present invention, a lead block is connected to one end of the threading channel away from the auxiliary threading tube, and a guide hole communicating with the threading channel is provided in the lead block.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] 1. This solution introduces gas through the gas channel to form a gas film, which reduces the frictional resistance between the optical fiber and the inner wall of the sheath, avoiding the risks of optical fiber breakage, micro-bending and jamming caused by traditional methods; at the same time, the positive pressure of the gas causes the sheath to expand slightly, further reducing the insertion resistance and improving the insertion efficiency of the optical fiber.

[0016] 2. This solution uses a locking assembly, which securely locks the sheath through a petal-shaped tightening port and a nut sleeve. The annular locking block and annular locking groove effectively prevent gas leakage and sheath displacement, ensuring installation stability. Attached Figure Description

[0017] Figure 1 A structural diagram of an optical fiber sheath insertion auxiliary device provided in the first embodiment of this utility model;

[0018] Figure 2 A structural diagram of an optical fiber sheath insertion auxiliary device provided in the second embodiment of this utility model;

[0019] Figure 3 This is a structural diagram of the threading block provided in the second embodiment of the present invention;

[0020] Figure 4 for Figure 2 A cross-sectional view of the main threading body and auxiliary threading spool in a cross section;

[0021] Figure 5 This is a structural diagram of the auxiliary threading tube provided in the second embodiment of the present utility model;

[0022] Figure 6 A structural diagram of an optical fiber sheath insertion auxiliary device provided in the third embodiment of this utility model;

[0023] Figure 7 A structural diagram of the locking assembly provided by this utility model.

[0024] Reference numerals: 1. Threading body; 1a. First threading block; 1b. Second threading block; 101. Threading channel; 102. Annular groove; 1021. Positioning post; 103. Mounting cylinder; 104. Air source chamber; 105. Connector; 106. Air inlet channel; 2. Auxiliary threading cylinder; 201. Air inlet; 202. Annular block; 2021. Notch; 3. Locking assembly; 301. Fixing cylinder; 3012. Tightening port; 302. Nut sleeve; 4. Sealing ring; 401. Air groove; 5. Lead block; 501. Guide hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0026] like Figure 1 As shown, a fiber optic sheath insertion auxiliary device provided in the first embodiment of this utility model includes a insertion body 1 and a locking assembly 3. The insertion body 1 has an insertion channel 101. One end of the insertion body 1 is fixedly connected to an auxiliary insertion cylinder 2. The auxiliary insertion cylinder 2 is located at one end of the insertion channel 101 for inserting one end of the sheath. One end of the locking assembly 3 is fixed to the insertion body 1, and the other end is used to lock the sheath onto the auxiliary insertion cylinder 2. An air source chamber 104 is also provided on one side of the insertion channel 101 on the insertion body 1. An air inlet 201 is axially penetrated in the cylinder wall of the auxiliary insertion cylinder 2. One end of the air source chamber 104 is connected to an air compressor through a connector 105, and the other end is connected to the air inlet 201 through an air inlet channel 106.

[0027] like Figure 2 and Figure 3 As shown, this is a fiber optic sheath insertion auxiliary device provided in the second embodiment of the present invention. Unlike the first embodiment, the insertion body 1 is composed of two identical semi-circular insertion blocks 1a and 1b. The insertion channel 101 is separately disposed on the first insertion block 1a and the second insertion block 1b. Each of the first insertion block 1a and the second insertion block 1b has a separate air source cavity 104, and each has a separate connector 105 and an air inlet channel 106 connected to its respective air source cavity 104. This modular design allows the insertion body 1 to be flexibly disassembled and assembled according to the sheath specifications. When it is necessary to adapt to sheaths of different diameters, only the corresponding size auxiliary insertion tube 2 needs to be replaced, and then fixed by splicing the first insertion block 1a and the second insertion block 1b. The entire device does not need to be replaced, significantly improving the versatility of the equipment. Meanwhile, the two threading blocks are equipped with independent air source chambers 104 and air inlet channels 106, which allows gas to be injected simultaneously from both sides of the sheath, ensuring the uniformity of gas distribution inside the sheath and avoiding the problem of uneven gas film thickness caused by unilateral gas supply.

[0028] Furthermore, in this embodiment, the auxiliary threading cylinder 2 is provided with air inlets 201 that communicate with the two air inlet channels 106 respectively. One end of the auxiliary threading cylinder 2 is provided with an annular locking block 202, and the threading channel 101 is provided with an annular locking groove 102 that matches the annular locking block 202. The cooperation between the annular locking block 202 and the annular locking groove 102 achieves precise positioning of the auxiliary threading cylinder 2 and the threading body 1, ensuring accurate docking of the air inlet channel 106 and the air inlet 201, and preventing gas leakage during transmission. When gas enters the air inlet 201 from the air inlet channel 106, due to the precise docking of the two, the gas can directly enter the interior of the sheath along the axial direction of the auxiliary threading cylinder 2, forming a stable airflow and providing continuous power for the formation of the air film.

[0029] like Figure 4 As shown, a sealing ring 4 is also provided inside the annular groove 102. The sealing ring 4 is used for an airtight connection between the air intake channel 106 and the air intake hole 201. The sealing ring 4 has an air groove 401 for connecting the air intake channel 106 and the air intake hole 201 to prevent gas leakage. The sealing ring 4 further enhances the sealing performance of the air circuit. Its material is made of aging-resistant rubber, which can maintain elasticity during long-term use and effectively fill the tiny gap between the annular block 202 and the annular groove 102. The design of the air groove 401, while ensuring sealing, provides a directional transmission channel for gas, allowing gas to flow unobstructed from the air intake channel 106 into the air intake hole 201, ensuring that the gas supply efficiency is not affected.

[0030] Furthermore, such as Figure 5 As shown, the annular locking block 202 has a notch 2021, and the annular groove 102 has a positioning post 1021 corresponding to the notch 2021 on its circumferential inner wall. The cooperation between the notch 2021 and the positioning post 1021 restricts the circumferential rotation of the auxiliary wire threading tube 2 within the annular groove 102, ensuring that the air inlet 201 is always aligned with the air inlet channel 106. When assembling or replacing the auxiliary wire threading tube 2, the operator only needs to align the notch 2021 with the positioning post 1021 to achieve precise positioning without repeated adjustments, greatly improving installation efficiency.

[0031] like Figure 7As shown, the locking assembly 3 in this embodiment includes a fixed cylinder 301. The threading body 1 has an installation cylinder 103 threadedly connected to one end of the fixed cylinder 301 at one end of its opening in the threading channel 101. The other end of the fixed cylinder 301 has a petal-shaped tightening opening 3012. One end of the auxiliary threading cylinder 2 extends into the tightening opening 3012. A nut sleeve 302 is threaded onto the fixed cylinder 301. Rotating the nut sleeve 302 opens or closes the tightening opening 3012. When the sheath is fitted onto the auxiliary threading cylinder 2, rotating the nut sleeve 302 causes its inner wall to press against the outer side of the petal-shaped tightening opening 3012, causing the tightening opening 3012 to contract towards the center and tightly fit against the outer wall of the sheath, thus firmly fixing the sheath to the auxiliary threading cylinder 2. This locking method can adaptively adjust the locking force according to the diameter of the sheath, ensuring that the sheath does not shift during threading and preventing deformation of the sheath due to excessive locking force. When the nut sleeve 302 is rotated in the opposite direction, the tightening port 3012 opens under its own elasticity, allowing the sleeve to be removed quickly, making the operation convenient and efficient.

[0032] like Figure 6 As shown, in the third embodiment of this utility model, a lead block 5 is connected to the end of the threading channel 101 away from the auxiliary threading cylinder 2. A guide hole 501 communicating with the threading channel 101 is provided inside the lead block 5. The entrance end of the guide hole 501 adopts a flared design with a diameter slightly larger than the diameter of the optical fiber, which guides the optical fiber and prevents it from bending due to angular deviation when entering the threading channel 101. Simultaneously, the inner wall of the guide hole 501 is polished, with a surface roughness of less than 0.8 μm, significantly reducing the frictional resistance between the optical fiber and the hole wall, allowing the optical fiber to smoothly enter the threading channel 101.

[0033] The working principle of this device is as follows: When inserting optical fibers, the sheath is first placed on the auxiliary threading cylinder 2. The tightening port 3012 is tightened by rotating the nut sleeve 302 of the locking assembly 3, thus fixing the sheath. Then, the air compressor is started, and the gas enters the air source chamber 104 through the connector 105, and then enters the air inlet 201 of the auxiliary threading cylinder 2 through the air inlet channel 106 and the air groove 401 of the sealing ring 4. Finally, the gas is injected into the inside of the sheath, forming a uniform gas film between the inner wall of the sheath and the optical fiber. Finally, the optical fiber is inserted through the guide hole 501 of the lead block 5, and enters the sheath through the threading channel 101. Under the lubrication of the gas film, the optical fiber can be smoothly inserted into the inside of the sheath, completing the insertion.

[0034] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An auxiliary device for fiber optic sheath installation, characterized in that, The device includes a threading body (1) and a locking assembly (3). The threading body (1) has a threading channel (101) inside. One end of the threading body (1) is fixedly connected to an auxiliary threading tube (2). The auxiliary threading tube (2) is located at one end of the threading channel (101) and is used to cover one end of the sheath. One end of the locking assembly (3) is fixed to the threading body (1), and the other end is used to lock the sheath onto the auxiliary threading tube (2). An air source chamber (104) is also provided on one side of the threading channel (101) on the threading body (1). An air inlet (201) is provided through the cylinder wall of the auxiliary threading tube (2) along the axial direction. One end of the air source chamber (104) is connected to an air compressor through a connector (105), and the other end is connected to the air inlet (201) through an air inlet channel (106).

2. The optical fiber sheath insertion auxiliary device according to claim 1, characterized in that, The threading body (1) is composed of two semi-circular first threading blocks (1a) and second threading blocks (1b) with the same structure. The threading channel (101) is split and set on the first threading block (1a) and the second threading block (1b). The first threading block (1a) and the second threading block (1b) have separate air source chambers (104) and are each provided with a connector (105) and an air inlet channel (106) connected to their respective air source chambers (104).

3. The optical fiber sheath insertion auxiliary device according to claim 1 or 2, characterized in that, The auxiliary threading tube (2) has an air inlet (201) that is connected to the two air inlet channels (106) respectively. One end of the auxiliary threading tube (2) is provided with an annular locking block (202). The threading channel (101) has an annular locking groove (102) that is adapted to the annular locking block (202).

4. The optical fiber sheath insertion auxiliary device according to claim 3, characterized in that, A sealing ring (4) is also provided in the annular groove (102). The sealing ring (4) is used for airtight connection between the air intake channel (106) and the air intake hole (201). An air groove (401) is provided on the sealing ring (4) for connecting the air intake channel (106) and the air intake hole (201).

5. The optical fiber sheath insertion auxiliary device according to claim 4, characterized in that, The annular card block (202) has a notch (2021), and the annular card groove (102) has a positioning post (1021) corresponding to the notch (2021) on its circumferential inner wall.

6. The optical fiber sheath insertion auxiliary device according to claim 1 or 2, characterized in that, The locking assembly (3) includes a fixed cylinder (301), and the wire threading body (1) is provided with an installation cylinder (103) that is threaded to one end of the fixed cylinder (301) at one end of the wire threading channel (101). The other end of the fixed cylinder (301) is provided with a petal-shaped tightening opening (3012). One end of the auxiliary wire threading cylinder (2) extends into the tightening opening (3012). The fixed cylinder (301) is threaded with a nut sleeve (302). Rotating the nut sleeve (302) opens or closes the tightening opening (3012).

7. The optical fiber sheath insertion auxiliary device according to claim 6, characterized in that, The end of the threading channel (101) away from the auxiliary threading tube (2) is connected to a lead block (5), and the lead block (5) has a guide hole (501) that communicates with the threading channel (101).

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