Optical cable pre-terminating assembly

Abstract

The utility model discloses an optical cable pre-terminating assembly, and relates to the technical field of optical cable connection, the optical cable pre-terminating assembly comprises a first splitter, a first protective sleeve and a second protective sleeve, a first wire passing channel is formed in the first splitter, one end of the first splitter is provided with a first wire inlet communicated with the first wire passing channel, and the other end of the first splitter is provided with a second wire inlet communicated with the second wire passing channel. A plurality of first branching holes communicated with the first wire passing channel are formed in one end, far away from the first wire inlet, of the first splitter; an accommodating space is formed in the first protective sleeve, the first protective sleeve is arranged on the outer wall of the first splitter in a sealing and sleeving manner, and the accommodating space is communicated with the plurality of first branching holes; the second protective sleeve is sleeved outside the first splitter and the first protective sleeve and is fixedly connected with the optical cable. The second protective sleeve is provided with a traction part. The pre-terminating optical cable is protected through the first protective sleeve and the second protective sleeve, so that the capability of the pre-terminating optical cable for resisting external force damage, rainwater and the like is improved, and the damage risk of the pre-terminating optical cable is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of optical cable connection, especially relates to an optical cable pre-termination assembly. BACKGROUND

[0002] Optical fiber communication technology is a high-speed, stable and reliable communication method, which is widely used in communication networks. Optical fiber is usually composed of a core and a cladding. The core is responsible for transmitting optical signals, and the cladding ensures that the optical signals are reflected within the core without leaking. An optical cable is a cable structure composed of multiple optical fibers, reinforcing elements (such as steel wires or aramid fibers), and protective layers (such as sheaths).

[0003] In traditional technology, when connecting outdoor optical cables to indoor, the main method is fusion splicing. The protective layer of the optical cable needs to be stripped on site to expose the optical fiber, and then fused with the indoor optical fiber. This fusion splicing method requires very professional equipment and technical personnel, which increases the cost and difficulty of construction. Secondly, the efficiency of optical cable fusion splicing is low, especially in the fusion splicing of large-core optical cables, which requires a lot of time and manpower. Finally, the maintenance of optical cable fusion splicing is difficult. Once the optical fiber cable fails, professional personnel are needed for detection and repair, which increases the maintenance cost and time.

[0004] Therefore, in the related technology, the pre-termination method is used to connect the outdoor optical cable to the indoor, that is, the protective layer of the optical cable is stripped in advance and the optical fiber connector is connected at the end of the optical fiber. An optical fiber adapter is set up indoors to achieve the connection of the outdoor optical cable to the indoor by inserting the optical fiber connector into the optical fiber adapter. The pre-terminated optical cable has been stripped of the protective layer. If it is not used directly, the exposed optical fiber and optical fiber connector may be affected by external forces or rainwater, etc. and the pre-terminated optical cable often needs to be transported, etc. There is a risk of damage during transportation due to impact or friction. SUMMARY

[0005] The main purpose of the utility model is to provide an optical cable pre-termination assembly, which aims to improve the protection of pre-terminated optical cables and reduce the risk of damage to pre-terminated optical cables.

[0006] In order to achieve the above object, the utility model provides a cable pre-termination assembly, which comprises a first branch device, a first protective sleeve and a second protective sleeve, a first wire passing channel is formed in the first branch device, one end of the first branch device is provided with a first wire inlet port communicated with the first wire passing channel, and the end of the first branch device away from the first wire inlet port is provided with a plurality of first branch holes communicated with the first wire passing channel; a containing space is formed in the first protective sleeve, the first protective sleeve is arranged on the outer wall of the first branch device, and the containing space is communicated with the plurality of first branch holes; the second protective sleeve is detachably arranged outside the first branch device and the first protective sleeve and is connected and fixed with the optical cable, and a traction part is arranged on the second protective sleeve.

[0007] In an embodiment, the first protective sleeve comprises a connecting sleeve, a bellows and a sealing cover; the connecting sleeve is arranged on the outer wall of the first branch device and is sealingly connected with the outer wall of the first branch device; one end of the bellows is connected with the connecting sleeve, the containing space is formed in the bellows, and the bellows can be contracted to expose the optical fiber; the sealing cover covers the end of the bellows away from the connecting sleeve, and the sealing cover is detachably connected with the bellows.

[0008] In an embodiment, the outer wall of the first branch device is provided with a locking groove, the inner wall of the connecting sleeve is provided with a locking protrusion, and the locking protrusion is clamped with the inner wall of the locking groove.

[0009] In an embodiment, the inner wall of the connecting sleeve is provided with a first clamping groove, the first clamping groove is arranged to extend along the inner periphery of the connecting sleeve; a second clamping groove is formed in the sealing cover, the second clamping groove is arranged to extend along the inner periphery of the sealing cover; one end of the bellows is clamped with the inner wall of the first clamping groove, and the other end of the bellows is clamped with the inner wall of the second clamping groove.

[0010] In an embodiment, the optical cable pre-termination assembly further comprises a first sealing member, a second sealing member and a third sealing member; the first sealing member connects the connecting sleeve and the first branch device, the second sealing member connects the connecting sleeve and the bellows, and the third sealing member connects the sealing cover and the bellows.

[0011] In an embodiment, the optical cable pre-termination assembly further comprises a plurality of branch sleeves, each branch sleeve is connected with the first branch device, and the inner cavity of each branch sleeve corresponds to the first branch hole.

[0012] In an embodiment, the cable pre-termination assembly further comprises a second brancher; the second brancher is formed with a second wire passing channel; one end of the second brancher is provided with a second wire inlet port in communication with the second wire passing channel; the end of the second brancher away from the second wire inlet port is provided with a plurality of second wire outlet holes in communication with the second wire passing channel; the periphery of the second wire inlet port is connected with the end of the branch sleeve away from the first brancher, and the second wire inlet port is in communication with the inner cavity of the branch sleeve.

[0013] In an embodiment, among the plurality of branch sleeves, the lengths of any two branch sleeves are not equal.

[0014] In an embodiment, the branch sleeve comprises a first tube segment, a connecting tube segment and a second tube segment connected in sequence; the first tube segment is connected with the periphery of the first wire outlet hole; the first brancher has a central axis; the first tube segment and the second tube segment are arranged parallel to the central axis of the first brancher; and the connecting tube segment is arranged gradually away from the central axis of the first brancher in the direction from the first tube segment to the second tube segment.

[0015] In an embodiment, the second protective sleeve is a woven mesh sleeve structure; and / or the traction part is at least one of a pull ring, a hook and a handle.

[0016] The cable pre-termination assembly comprises a first brancher, a first protective sleeve and a second protective sleeve; the first brancher is formed with a first wire passing channel; one end of the first brancher is provided with a first wire inlet port in communication with the first wire passing channel; the end of the first brancher away from the first wire inlet port is provided with a plurality of first wire outlet holes in communication with the first wire passing channel; the first protective sleeve is formed with an accommodating space; the first protective sleeve sealing sleeve is arranged on the outer wall of the first brancher, and the accommodating space is in communication with the plurality of first wire outlet holes; the second protective sleeve is sleeved on the first brancher and the first protective sleeve and is connected and fixed with the optical cable; and the second protective sleeve is provided with a traction part. The first brancher is used to branch the optical fibers stripped from the optical cable; the first protective sleeve is sealingly sleeved on the first brancher, and accommodates the branched optical fibers and the optical fiber connector, thereby preventing external force or rainwater from affecting the use of the optical fibers; the second protective sleeve is used to protect the first brancher and the first protective sleeve, thereby preventing the optical fibers from being damaged by impact or friction during transportation and preventing the sealing property of the first protective sleeve from being damaged, so that the protection of the pre-terminated optical cable is improved, and the risk of damage to the pre-terminated optical cable is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] 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 the structures shown in these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a structure of an embodiment of the optical cable pre-termination assembly provided by this utility model;

[0019] Figure 2 for Figure 1 A schematic diagram showing the disassembled pre-terminated assembly of the optical fiber cable;

[0020] Figure 3 for Figure 1 Cross-sectional views of the first and second protective sleeves;

[0021] Figure 4 for Figure 1 A schematic diagram of the partial structure of the optical fiber pre-terminated assembly after it has been partially concealed;

[0022] Figure 5 for Figure 1 Another structural diagram of the pre-terminated optical fiber cable assembly after partial structural concealment;

[0023] Figure 6 for Figure 5 A schematic diagram of the partial structure of the optical fiber pre-terminated assembly after it has been partially concealed;

[0024] Figure 7 for Figure 3 Exploded view of the structure of the first branch unit;

[0025] Figure 8 for Figure 6 A cross-sectional view of the second branch in the middle.

[0026] Explanation of icon numbers:

[0027] 100. Optical cable pre-terminated assembly;

[0028] 1. First brancher; 1a. First cable passage; 1b. First cable inlet; 1c. First cable splitting hole; 1d. Locking slot; 1F. Central shaft; 11. Outer frame; 12. Tail sleeve; 13. Cable splitting cover;

[0029] 2. First protective sleeve; 2a. Accommodating space; 21. Connecting sleeve; 21a. First snap-fit ​​groove; 22. Bellows; 23. Sealing cover; 23a. Second snap-fit ​​groove;

[0030] 3. Second protective sleeve; 31. Traction unit;

[0031] 41, first seal; 42, second seal; 43, third seal;

[0032] 5, branch sleeve; 51, first pipe section; 52, connecting pipe section; 53, second pipe section;

[0033] 6, second branch; 6a, second wire passage; 6b, second wire inlet; 6c, second wire hole;

[0034] 200, optical cable; 210, optical fiber; 211, optical fiber connector.

[0035] The implementation, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0037] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0038] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one feature. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0039] The utility model provides a kind of optical cable pre-termination assembly 100.

[0040] Please refer toFigures 1 to 3 In an embodiment of the present application, the optical cable pre-terminated assembly 100 comprises a first branch device 1, a first protective sleeve 2 and a second protective sleeve 3. The first branch device 1 is formed with a first wire passage 1a. One end of the first branch device 1 is provided with a first wire inlet 1b in communication with the first wire passage 1a. The end of the first branch device 1 away from the first wire inlet 1b is provided with a plurality of first wire holes 1c in communication with the first wire passage 1a. The first protective sleeve 2 is formed with an accommodating space 2a. The first protective sleeve 2 is sealingly sleeved on the outer wall of the first branch device 1, and the accommodating space 2a is in communication with the plurality of first wire holes 1c. The second protective sleeve 3 is detachably sleeved on the first branch device 1 and the first protective sleeve 2 and is connected and fixed with the optical cable 200. The second protective sleeve 3 is provided with a traction part 31.

[0041] In the present embodiment, in order to branch and fix the optical fiber 210 stripped from the optical cable 200, the optical cable pre-terminated assembly 100 of the present embodiment comprises a first branch device 1. The first branch device 1 is in a cylindrical structure. The first branch device 1 is formed with a first wire passage 1a. One end of the first branch device 1 is provided with a first wire inlet 1b in communication with the first wire passage 1a. The first wire inlet 1b is used for the stripped optical fiber 210 and part of the optical cable 200 to pass in. The optical cable 200 passes into the wire inlet and is sealingly connected with the inner wall of the wire inlet. The size of the wire inlet matches the outer diameter of the optical cable 200. The end of the first branch device 1 away from the first wire inlet 1b is provided with a plurality of first wire holes 1c in communication with the first wire passage 1a. After the optical fiber 210 passes into the first wire inlet 1b and is branched into a plurality of branches, each branch passes out of the first branch device 1 from one first wire hole 1c. The size of the first wire hole 1c can be set according to the number of optical fibers 210 contained in each branch, i.e., the first branch device 1 is used to realize branching of the optical cable 200 into a plurality of branches.

[0042] In order to facilitate the threading operation of the optical fiber 210, the first branch device 1 can adopt a multi-segment structure. For example, please refer to Figure 7The first brancher 1 comprises an outer frame 11, a tail sleeve 12 and a distribution cover 13. The outer frame 11 is in a cylindrical structure and serves to protect the stripped optical fiber 210 in the optical cable 200. A wire passage is formed in the outer frame 11, and the outer frame 11 is open at both ends, i.e., the first and second openings are formed at the two ends of the outer frame 11, and the first opening, the wire passage and the second opening are sequentially communicated. The tail sleeve 12 is connected with the periphery of the first opening and is in a cylindrical structure. A first wire inlet 1b is formed in the tail sleeve 12 for the optical cable 200 to pass through. The size of the first wire inlet 1b is slightly larger than the outer diameter of the optical cable 200, so that the optical cable 200 can pass through while preventing liquid or dust from entering the first brancher 1. The distribution cover 13 is connected with the periphery of the second opening and covers the second opening. The distribution cover 13 is provided with at least two first distribution holes 1c arranged at intervals. When the first brancher 1 is assembled with the optical cable 200, the branched optical fibers are at least two strands, and each strand of optical fiber 210 passes through one first distribution hole 1c. The first distribution hole 1c can bundle each strand of optical fiber 210 to prevent the optical fiber 210 from scattering. The distribution cover 13 realizes the branching of the optical cable 200, and each branched optical cable 200 can perform different signal transmission work, such as data, voice, video, etc., thereby supporting multiple services at the same time. In addition, when a branch fails, it can be quickly isolated and investigated to find the faulty branch.

[0043] The optical cable pre-terminated assembly 100 of the embodiment further comprises a first protective sleeve 2 and a second protective sleeve 3. The first protective sleeve 2 can be in a cylindrical structure and has an accommodation space 2a formed therein. The first protective sleeve 2 is sealingly connected to the outer wall of the first brancher 1, and the accommodation space 2a is in communication with the plurality of first distribution holes 1c. Thus, the plurality of branched optical fibers and the optical fiber connector 211 provided at the end of the optical fiber 210 can be temporarily accommodated in the accommodation space 2a. The first protective sleeve 2 is sealingly connected to the outer wall of the first brancher 1, which can be achieved by arranging a sealing member or a sealing agent between the first brancher 1 and the first protective sleeve 2. Thus, the first protective sleeve 2 serves to seal and protect the pre-terminated optical fiber 210 and can resist external forces to some extent to prevent damage. The first protective sleeve 2 can be made of thermoplastic elastomer (TPE) or silicone rubber. The thermoplastic elastomer has high elasticity and bending resistance, which can meet the bending requirements of the branched optical fiber. At the same time, the sealing between the first protective sleeve 2 and the brancher is achieved through interference fit. The silicone rubber has a wide temperature resistance range and is suitable for complex environments such as data centers. The first protective sleeve 2 can also be a heat-shrinkable sleeve (such as PE heat-shrinkable material), which can tightly wrap the brancher after heating.

[0044] The second protective sleeve 3 is detachably sleeved outside the first branch device 1 and the first protective sleeve 2 and is connected and fixed with the optical cable 200, that is, the second protective sleeve 3 wraps the pre-terminated part of the optical fiber 210 and is connected and fixed with the unstripped protective layer of the optical cable 200, the second protective sleeve 3 is provided with a traction part 31 for traction during the carrying of the optical cable 200, the traction part 31 can be grabbed or hooked by a mobile device or a person, and the like, during the carrying, the second protective sleeve 3 isolates the first protective sleeve 2 and the optical fiber 210 in the inside, and the traction force is directly transmitted to the unstripped protective layer of the optical cable 200 through the second protective sleeve 3, so that the optical fiber 210 is prevented from being damaged by force. When used in the indoor access room, the second protective sleeve 3 can be removed to expose the inside branch optical fiber. The second protective sleeve 3 can be made of wear-resistant materials. The material of the second protective sleeve 3 can be selected from engineering plastics (such as PA66+30% glass fiber reinforced), which has high strength and can withstand traction and impact. The second protective sleeve 3 can also be made of metal or a composite material of metal and plastic, for example, the shell body is made of ABS plastic, and metal wires are embedded in the inside to improve the overall structural strength. The second protective sleeve 3 can also be made of polycarbonate (PC) transparent modified material, which can conveniently observe the state of the inside optical fiber 210. The second protective sleeve 3 can also be modified polyurethane (PU), which has wear resistance and flexibility, and the surface can be designed with anti-slip texture to enhance the operation stability, and has ultraviolet resistance, which is suitable for outdoor scenes.

[0045] The optical cable pre-termination assembly 100 provided in the embodiment realizes the branching of the optical fiber 210 stripped from the optical cable 200 through the first branch device 1, the first protective sleeve 2 is sealingly sleeved outside the first branch device 1 and contains the branch optical fiber and the optical fiber connector 211, thereby preventing external force or rainwater and the like from affecting the use of the optical fiber 210, and the first branch device and the first protective sleeve 2 are protected by the second protective sleeve 3, so that the sealing property of the first protective sleeve 2 is prevented from being damaged by possible impact or friction during the transportation and the like, thereby improving the protection of the pre-terminated optical cable 200 and reducing the risk of damage to the pre-terminated optical cable 200.

[0046] Further, referring to Figures 2 to 3 In an embodiment of the utility model, the first protective sleeve 2 includes a connecting sleeve 21, a bellows 22 and a sealing cover 23, the connecting sleeve 21 is sleeved on the outer wall of the first branch device 1 and sealingly connected with the outer wall of the first branch device 1, one end of the bellows 22 is connected with the connecting sleeve 21, and the bellows 22 forms an accommodating space 2a in the inside, and the bellows 22 can be contracted to expose the optical fiber 210, and the sealing cover 23 covers the end of the bellows 22 away from the connecting sleeve 21, and the sealing cover 23 is detachably connected with the bellows 22.

[0047] In the embodiment, the first protective sleeve 2 comprises a connecting sleeve 21, a bellows 22 and a sealing cover 23. The connecting sleeve 21 is sleeved on the outer wall of the first branch device 1 and is sealingly connected with the outer wall of the first branch device 1. One end of the bellows 22 is connected with the connecting sleeve 21, and a containing space 2a is formed in the bellows 22. Considering that the space occupied by the branch optical fiber will increase after the branch, the diameter of the bellows 22 selected is larger than the diameter of the first branch device 1. Therefore, the connecting sleeve 21 has a large-diameter end and a small-diameter end. The large-diameter end is connected with the bellows 22, and the small-diameter end is connected with the first branch device 1. In order to maintain the sealing performance, the end of the bellows 22 away from the connecting sleeve 21 is provided with the sealing cover 23. The sealing cover 23 can be provided with an interference fit with the bellows 22, or a sealing member can be arranged between the sealing cover 23 and the bellows 22 and the sealing cover 23 and the bellows 22 are clamped. In this way, the sealing cover 23 and the bellows 22 can maintain sealing, and a certain force can also separate the two. After the sealing cover 23 is removed, the bellows 22 can be deformed to expose the branch optical fiber and the optical fiber connector 211 in the bellows 22, which is convenient for indoor access. When in use, the bellows 22 is in a contracted state. When the optical cable 200 needs to be transferred, the bellows 22 can be stretched to rewrap the branch optical fiber and the optical fiber connector 211, and the protective cover is covered to restore the sealing.

[0048] Further, please refer to Figure 2 and Figure 7 In an embodiment of the utility model, the outer wall of the first branch device 1 is provided with a locking groove 1d, and the inner wall of the connecting sleeve 21 is provided with a locking protrusion. The locking protrusion is clamped with the inner wall of the locking groove 1d.

[0049] In the embodiment, the first branch device 1 and / or the connecting sleeve 21 are made of a plastic material that can be elastically deformed. The outer wall of the first branch device 1 is provided with a locking groove 1d, and the inner wall of the connecting sleeve 21 is provided with a locking protrusion. When the connecting sleeve 21 is sleeved on the outer wall of the first branch device 1, the connector and / or the first branch device 1 are elastically deformed due to the sliding abutment of the locking protrusion with the outer wall of the first branch device 1. When the locking protrusion slides into the locking groove 1d, the elastic deformation of the first branch device 1 and / or the connecting sleeve 21 is restored, and the locking protrusion is clamped with the inner wall of the locking groove 1d. In this way, the locking of the connecting sleeve 21 and the first branch device 1 is achieved. When the locking protrusion slides into the locking groove 1d, there is a difference in hand feeling, which is convenient for assembly personnel to know whether it is installed in place.

[0050] Further, please refer to Figure 3In the embodiment of the utility model, the inner wall of the connecting sleeve 21 is provided with a first clamping groove 21a, the first clamping groove 21a is arranged along the inner periphery of the connecting sleeve 21; the sealing cover 23 is formed with a second clamping groove 23a, the second clamping groove 23a is arranged along the inner periphery of the sealing cover 23; one end of the corrugated pipe 22 is clamped with the inner wall of the first clamping groove 21a, and the other end of the corrugated pipe 22 is clamped with the inner wall of the second clamping groove 23a.

[0051] In the embodiment, the outer wall of the two ends of the corrugated pipe 22 is optionally provided with corrugations, the shapes of the first clamping groove 21a and the second clamping groove 23a are matched with the corrugation shape of the outer wall of the corrugated pipe 22, so that the clamping of the corrugated pipe 22 with the connecting sleeve 21 and the clamping of the corrugated pipe 22 with the sealing cover 23 can be realized. Preferably, the two ends of the corrugated pipe 22 are provided with a de-corrugation, the two ends of the corrugated pipe 22 are restored to smooth cylindrical surfaces, and clamping protruding rings are arranged on the cylindrical surfaces of the two ends respectively, clamping ring grooves are arranged in the connecting sleeve 21 and the sealing cover 23 respectively, and the clamping of the corrugated pipe 22 with the connecting sleeve 21 and the clamping of the corrugated pipe 22 with the sealing cover 23 are realized through the clamping of the clamping protruding rings with the inner walls of the clamping ring grooves. In this way, the connecting sleeve 21, the corrugated pipe 22 and the sealing cover 23 are connected together, a closed containing space 2a is formed in the interiors of the three, the protection of the branch optical fiber and the optical fiber connector 211 is realized, and the three are not easy to fall off during the carrying process, so that the sealing property of the first protective sleeve 2 is guaranteed.

[0052] Further, referring to Figure 3 In the embodiment of the utility model, the optical cable pre-termination assembly 100 further comprises a first sealing member 41, a second sealing member 42 and a third sealing member 43; the first sealing member 41 connects the connecting sleeve 21 and the first branch device 1, the second sealing member 42 connects the connecting sleeve 21 and the corrugated pipe 22, and the third sealing member 43 connects the sealing cover 23 and the corrugated pipe 22.

[0053] In the embodiment, in order to strengthen the sealing performance among the first branch device 1, the connecting sleeve 21, the corrugated pipe 22 and the sealing cover 23, sealing members are arranged between the connecting sleeve 21 and the first branch device 1, between the connecting sleeve 21 and the corrugated pipe 22 support and between the sealing cover 23 and the corrugated pipe 22. Optionally, the sealing member can adopt a sealing agent, preferably, the sealing member can adopt a sealing ring, further, ring grooves can be arranged on the inner wall of the connecting sleeve 21 and the inner wall of the sealing cover 23 to realize the positioning of the sealing ring.

[0054] Further, referring to Figures 4 to 6 In the embodiment of the utility model, the optical cable pre-termination assembly 100 further comprises a plurality of branch sleeves 5, each branch sleeve 5 is connected with the first branch device 1, and the inner cavity of each branch sleeve 5 corresponds to a first branch hole 1c in communication.

[0055] In the embodiment, the first brancher 1 is further provided with a plurality of branch sleeves 5 at the end close to the first tapping hole 1c. The branch fibers enter the branch sleeves 5 from the first tapping hole 1c. The branch sleeves 5 are used for protecting and restraining a plurality of optical fibers 210 in a strand of branch fibers, so that the branch fibers are orderly arranged without being entangled with each other. One end of the branch sleeve 5 is connected with the tapping cover 13 and communicates with the first tapping hole 1c. Optionally, the branch sleeve 5 and the tapping cover 13 can be integrally formed. Preferably, the branch sleeve 5 and the tapping cover 13 can be detachably connected, for example, the branch sleeve 5 is inserted into the inner wall of the first tapping hole 1c. At this time, the branch sleeve 5 and the inner wall of the first tapping hole 1c can be provided with interference fit or clearance fit, so as to prevent the branch sleeve 5 from being easily detached from the first tapping hole 1c.

[0056] Further, referring to Figures 4 to 6 In the embodiment, the optical cable pre-terminated assembly 100 further comprises a second brancher 6. The second brancher 6 is formed with a second wire passing channel 6a. One end of the second brancher 6 is provided with a second wire inlet 6b which communicates with the second wire passing channel 6a. The end of the second brancher 6 away from the second wire inlet 6b is provided with a plurality of second tapping holes 6c which communicate with the second wire passing channel 6a. The periphery of the second wire inlet 6b is connected with the end of the branch sleeve 5 away from the first brancher 1, and the second wire inlet 6b communicates with the inner cavity of the branch sleeve 5.

[0057] In the embodiment, the end of the branch sleeve 5 away from the first brancher 1 is provided with the second brancher 6. The second brancher 6 is used for branching a strand of branch fibers into a plurality of separate optical fibers 210, so as to comb and maintain the orderly distribution of the optical fibers 210 and prevent the optical fibers 210 from being entangled together in disorder. The second brancher 6 is formed with the second wire passing channel 6a. One end of the second brancher 6 is provided with the second wire inlet 6b which communicates with the second wire passing channel 6a. The end of the second brancher 6 away from the second wire inlet 6b is provided with a plurality of second tapping holes 6c which communicate with the second wire passing channel 6a. The strand of branch fibers enters the second wire passing channel 6a from the second wire inlet 6b. After being branched into a plurality of separate optical fibers 210, each optical fiber 210 corresponds to one second tapping hole 6c and is drawn out from the second tapping hole 6c. Therefore, the diameter of the second tapping hole 6c can be set according to the outer diameter of the optical fiber 210. Optionally, the branch sleeve 5 and the second brancher 6 can be integrally formed. Preferably, the branch sleeve 5 and the second brancher 6 can be detachably connected, for example, the branch sleeve 5 is inserted into the inner wall of the second wire inlet 6b. At this time, the branch sleeve 5 and the inner wall of the second wire inlet 6b can be provided with interference fit or clearance fit, so as to prevent the branch sleeve 5 from being easily detached from the second wire inlet 6b.

[0058] Further, referring to Figure 2 and Figure 4In an embodiment of the utility model, in the multiple branch sleeve pipes 5, the length of any two branch sleeve pipes 5 is not equal.

[0059] In the embodiment, considering that the ground end of each optical fiber 210 in the branch optical fiber is provided with an optical fiber connector 211 to be connected with the indoor ground optical fiber 210 adapter, and the space occupied by the optical fiber connector 211 is relatively large, the length of each branch sleeve pipe 5 is increased in the embodiment, that is, the length of any two branch sleeve pipes 5 is not equal, so as to avoid that the optical fiber connectors 211 of the multiple branch optical fibers are stacked together, which is not convenient for accommodation and protection, and is not convenient for combing. In the embodiment, the branch pipes are arranged to be different lengths to be staggered, the radial size occupied by the optical fiber connector 211 of the branch optical fiber is reduced, and the effect of being convenient for protection and combing is achieved.

[0060] Further, refer to Figure 6 In an embodiment of the utility model, the branch sleeve pipe 5 includes a first pipe section 51, a connecting pipe section 52 and a second pipe section 53 connected in sequence, and the first pipe section 51 is connected with the periphery of the first branch hole 1c; the first branch device 1 has a central axis 1F, and the first pipe section 51 and the second pipe section 53 are arranged parallel to the central axis 1F of the first branch device 1, and the connecting pipe section 52 is arranged away from the central axis 1F of the first branch device 1 in the direction from the first pipe section 51 to the second pipe section 53.

[0061] In the embodiment, the branch sleeve pipe 5 is used for protecting the branch optical fibers drawn out from the outer frame 11, and the branch sleeve pipe 5 includes a first pipe section 51, a connecting pipe section 52 and a second pipe section 53, and the first pipe section 51, the connecting pipe section 52 and the second pipe section 53 are of an integrated structure. The first pipe section 51 is parallel to the central axis 1F of the first branch device 1, which ensures that the optical fiber 210 extends in a straight line when being drawn out from the branch hole, and avoids excessive bending of the optical fiber 210 due to angle mutation at the outlet of the branch hole. The connecting pipe section 52 is arranged away from the central axis 1F in a gradual opening manner, so that the multiple branch sleeve pipes 5 are arranged in a divergent layout in space, which effectively increases the distance between adjacent sleeve pipes and prevents the multiple branch optical fibers from being entangled with each other at the outlet area. The second pipe section 53 returns to the layout parallel to the central axis 1F, provides a stable axial outlet channel for the optical fiber connector 211, ensures that the optical fiber 210 is kept in a straight alignment when being connected at the end, and improves the combing convenience. The three-section branch sleeve pipe 5 structure of the embodiment realizes physical protection in the multiple branch optical fiber scenario through accurate control of the geometric layout of straight line, gradual opening straight line, detachable mechanical connection of the branch cover 13, the second fixing sleeve and the annular sealing layout. The connecting pipe section 52 is arranged away from the central axis 1F in a gradual opening manner, which avoids excessive bending of the optical fiber 210 at one time.

[0062] Further, refer to Figure 1 And Figure 2In an embodiment of the present application, the second protective sleeve 3 is a woven mesh sleeve structure; and / or the traction part 31 is at least one of a pull ring, a hook and a handle.

[0063] In the present embodiment, the second protective sleeve 3 is a woven mesh sleeve structure, which is used to isolate the first protective sleeve 2 and the optical fiber 210 inside, so as to prevent the optical fiber 210 from being damaged by external force or friction, and also prevent the sealing property of the first protective sleeve 2 from being damaged. The second protective sleeve 3 adopts a woven mesh sleeve structure, which is convenient for traction and sleeving, and can also be used to observe the sealing condition of the first protective sleeve 2 inside through the mesh holes, so as to replace or maintain in time. Optionally, the second protective sleeve 3 can be woven by plastic fiber with good wear resistance and tensile property, and when applied to a large optical cable, the second protective sleeve 3 can also be woven by a wire structure with good wear resistance, tensile property and corrosion resistance. It can be understood that, in order to facilitate manual or mechanical equipment grabbing, the traction part 31 can be provided as one or more of a pull ring, a hook and a handle.

[0064] The above description is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation or direct / indirect application in other related technical fields within the technical concept of the present application, as described in the present application and the drawings, is included in the patent protection scope of the present application.

Claims

1. An optical cable pre-terminated assembly, characterized by, The optical cable pre-termination assembly comprises: a first branch device (1) having a first wire passing channel (1a) formed therein, one end of the first branch device (1) being provided with a first wire inlet port (1b) in communication with the first wire passing channel (1a), and the end of the first branch device (1) away from the first wire inlet port (1b) being provided with a plurality of first wire outlet holes (1c) in communication with the first wire passing channel (1a); a first protective sleeve (2) having an accommodation space (2a) formed therein, the first protective sleeve (2) being sleeved on the outer wall of the first branch device (1), and the accommodation space (2a) being in communication with the plurality of first wire outlet holes (1c); and a second protective sleeve (3) being detachably sleeved on the first branch device (1) and the first protective sleeve (2) and being connected and fixed with the optical cable, the second protective sleeve (3) being provided with a pulling portion (31).

2. The optical cable pre-terminated assembly of claim 1, wherein, The first protective sleeve (2) comprises a connecting sleeve (21), a bellows (22) and a sealing cover (23); the connecting sleeve (21) is sleeved on the outer wall of the first branch device (1) and is sealingly connected with the outer wall of the first branch device (1); one end of the bellows (22) is connected with the connecting sleeve (21), the accommodation space (2a) is formed in the bellows (22), and the bellows (22) can be contracted to expose the optical fiber; the sealing cover (23) covers the end of the bellows (22) away from the connecting sleeve (21), and the sealing cover (23) is detachably connected with the bellows (22).

3. The optical cable pre-terminated assembly of claim 2, wherein, The outer wall of the first branch device (1) is provided with a locking groove (1d), and the inner wall of the connecting sleeve (21) is provided with a locking protrusion, the locking protrusion being clamped with the inner wall of the locking groove (1d).

4. The optical cable pre-terminated assembly of claim 2, wherein, The inner wall of the connecting sleeve (21) is provided with a first clamping groove (21a), the first clamping groove (21a) extending along the inner periphery of the connecting sleeve (21); the sealing cover (23) is provided with a second clamping groove (23a), the second clamping groove (23a) extending along the inner periphery of the sealing cover (23); one end of the bellows (22) is clamped with the inner wall of the first clamping groove (21a), and the other end of the bellows (22) is clamped with the inner wall of the second clamping groove (23a).

5. The optical cable pre-terminated assembly of claim 2, wherein, The optical cable pre-termination assembly further comprises a first sealing member (41), a second sealing member (42) and a third sealing member (43); the first sealing member (41) connects the connecting sleeve (21) with the first branch device (1), the second sealing member (42) connects the connecting sleeve (21) with the bellows (22), and the third sealing member (43) connects the sealing cover (23) with the bellows (22).

6. The optical cable pre-terminated assembly of claim 1, wherein, The optical cable pre-termination assembly further comprises a plurality of branch sleeves (5), each of the branch sleeves (5) being connected with the first branch device (1), and the inner cavity of each of the branch sleeves (5) corresponding to one of the first wire outlet holes (1c).

7. The optical cable pre-terminated assembly of claim 6, wherein, The optical cable pre-termination assembly further comprises a second branch device (6); The second branch device (6) is provided with a second wire passing channel (6a) formed therein, one end of the second branch device (6) is provided with a second wire inlet (6b) in communication with the second wire passing channel (6a), and the end of the second branch device (6) away from the second wire inlet is provided with a plurality of second wire outlet holes (6c) in communication with the second wire passing channel (6a); The periphery of the second wire inlet (6b) is connected with the end of the branch sleeve (5) away from the first branch device (1), and the second wire inlet (6b) is in communication with the inner cavity of the branch sleeve (5).

8. The optical cable pre-terminated assembly of claim 6, wherein, The lengths of any two of the plurality of branch sleeves (5) are not equal.

9. The optical cable pre-terminated assembly of claim 6, wherein, The branch sleeve (5) comprises a first tube segment (51), a connecting tube segment (52) and a second tube segment (53) connected in sequence, the first tube segment (51) is connected with the periphery of the first wire outlet hole (1c); The first branch device (1) has a central axis, the first tube segment (51) and the second tube segment (53) are arranged parallel to the central axis of the first branch device (1), and the connecting tube segment (52) is arranged away from the central axis of the first branch device (1) in the direction from the first tube segment (51) to the second tube segment (53).

10. The optical cable pre-terminated assembly of any one of claims 1 to 9, wherein, The second protective sleeve (3) is a woven mesh sleeve structure; And / or, the traction part (31) is at least one of a pull ring, a hook and a handle.

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