Tensile deepwater submarine cable optical fiber splice closure

Abstract

The utility model relates to a tensile deepwater submarine cable optical fiber splice closure. The tensile deepwater submarine cable optical fiber splice closure comprises a splice closure main body; the optical fiber frame is fixedly arranged in the splice closure main body, and the optical fiber frame is used for placing an optical fiber heat shrink tube; the two small thread sealing structures are symmetrically arranged, and the two small thread sealing structures are respectively connected with the two ends of the connection box main body; the armored fastening structure is arranged on the connection box main body; and the large thread sealing structure is arranged on the connection box main body, and the large thread sealing structure is used for sealing the connection box main body. The utility model discloses a tensile deepwater submarine cable optical fiber splice closure, which relates to the technical field of cables, has good sealing performance and has a good sealing effect in a deepwater test. The armored fastening structure can better fix the optical cable, and prevents the optical cable from being broken when the optical cable is subjected to a large external force. The whole optical fiber splice closure is simple in structure and convenient to install.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a tensile deep-sea cable optical fiber splicing box. Background Art

[0002] In an optical cable communication network, optical cables form a network through optical fiber connection. As a device for optical cable connection, an optical fiber splicing box has excellent mechanical strength, can prevent material aging caused by external heat, cold, light, oxygen and microorganisms, and is widely used in optical cable communication networks. It is mainly applicable to the through and branch connections of various structural optical cables in overhead, pipeline, direct burial and other laying methods, can effectively prevent water, fire and impact, play a good role in protecting the optical cable from stretching and torsion, and can ensure excellent communication quality even in harsh natural environments.

[0003] However, the existing optical fiber splicing box has poor connection tightness and sealing performance with the optical cable, cannot play an effective connection role when the optical cable is subjected to a large tensile force, and cannot play an effective sealing effect in deep-water tests, and cannot meet the usage requirements of the optical cable during laying. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the poor connection tightness and sealing performance between the existing optical fiber splicing box and the optical cable, which cannot play an effective connection role when the optical cable is subjected to a large tensile force, and cannot play an effective sealing role in deep-water tests, and cannot meet the usage requirements of the optical cable during laying.

[0005] To solve the above technical problem, the utility model provides a tensile deep-sea cable optical fiber splicing box, which includes: a splicing box main body; an optical fiber rack fixedly arranged in the splicing box main body, and the optical fiber rack is used for placing optical fiber heat shrinkable tubes; two small thread sealing structures symmetrically arranged, and the two small thread sealing structures are respectively connected to both ends of the splicing box main body; an armored fastening structure arranged on the splicing box main body; a large thread sealing structure arranged on the splicing box main body, and the large thread sealing structure is used for sealing the splicing box main body.

[0006] In an embodiment of the utility model, the splicing box main body includes an intermediate box body, a cone block and a housing. The two cone blocks are symmetrically arranged, and the two cone blocks are respectively arranged at both ends in the length direction of the intermediate box body. The housing is sleeved outside the intermediate box body and is sleeved on the cone block. A large thread sealing structure is arranged between the housing and the cone block, and the optical fiber rack is fixedly arranged on the intermediate box body.

[0007] In an embodiment of the utility model, the housing is cylindrical.

[0008] In an embodiment of the present utility model, a conical hole section is provided at one end of the conical block away from the main body of the splicing box. A first thread is provided at the small end of the conical block, and a second thread is provided at the large end of the conical block. A conical transition structure is provided between the small end and the large end of the conical block.

[0009] In an embodiment of the present utility model, the small thread sealing structure includes an external nut, a small gasket, and a small conical sealing ring. The external nut is connected to the first thread. One end of the small conical sealing ring close to the conical block is set to be conical, and the conical end of the small conical sealing ring is arranged in the conical hole section. The small gasket is arranged between the end faces where the small conical sealing ring contacts the conical block and the external nut for sealing.

[0010] In an embodiment of the present utility model, a circular ring connecting portion is provided at the end of the conical block extending into the main body of the splicing box, and a first conical surface is provided on the circular ring connecting portion.

[0011] In an embodiment of the present utility model, the armored fastening structure includes an armored pressing block and a stainless steel pipe pressing block. A conical block hole groove is provided in the conical block. The armored pressing block is arranged in the conical block hole groove, and the armored pressing block and the inner end face of the conical block hole groove are connected by fasteners. Connecting convex portions are provided at both ends of the intermediate box body, and the stainless steel pipe pressing block is locked on the connecting convex portion by screws.

[0012] In an embodiment of the present utility model, a groove is provided on the connecting convex portion. The stainless steel pipe pressing block is arranged in the groove. A wire passing hole is provided on the bottom surface of the groove, and the wire passing hole is communicated with the inside of the intermediate box body.

[0013] In an embodiment of the present utility model, the large thread sealing structure includes a large nut, a large gasket, and a large sealing ring. The large nut is connected to the second thread. The large gasket is arranged between the contact surfaces of the large nut and the circular ring connecting portion for sealing. The large sealing ring is sleeved on the first conical surface, and the large sealing ring contacts the inner wall of the outer shell.

[0014] In an embodiment of the present utility model, the large sealing ring is circular, and both the outer wall and the inner wall of the large sealing ring are set to be conical.

[0015] The above technical solution of the present utility model has the following beneficial effects compared with the prior art:

[0016] The tensile deep-sea optical cable fiber splicing box described in the present utility model has good sealing performance and good sealing effect in deep-water tests; the armored fastening structure can better fix the optical cable and prevent the optical cable from breaking when subjected to large external forces; the entire optical cable splicing box has a simple structure and is convenient for installation. Description of the Drawings

[0017] To make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments of the present utility model in conjunction with the accompanying drawings, where

[0018] Figure 1 is a schematic structural view of a tensile deep - sea cable optical fiber splicing box in a preferred embodiment of the present utility model;

[0019] Figure 2 is a sectional view of a tensile deep - sea cable optical fiber splicing box in a preferred embodiment of the present utility model;

[0020] Figure 3 is a schematic structural view of a splicing box body in a preferred embodiment of the present utility model;

[0021] Figure 4 is a schematic structural view of a small - thread sealing structure in a preferred embodiment of the present utility model;

[0022] Figure 5 is a schematic structural view of a tapered block and a large - thread sealing structure in a preferred embodiment of the present utility model;

[0023] Figure 6 is a schematic structural view of a large - thread sealing structure in a preferred embodiment of the present utility model.

[0024] Explanation of reference numerals in the drawings of the specification: splicing box body 1, intermediate box body 11, connecting convex portion 111, groove 112, wire - passing hole 113, through - hole one 114, tapered block 12, tapered hole section one 121, thread one 122, thread two 123, circular ring connecting portion 124, tapered surface one 125, tapered hole section two 126, outer shell 13, optical fiber rack 2, small - thread sealing structure 3, outer nut 31, small gasket 32, small tapered sealing ring 33, armored fastening structure 4, armored pressing block 40, connecting convex portion two 41, mounting hole two 411, stainless - steel pipe pressing block 42, large - thread sealing structure 5, large nut 51, large gasket 52, large sealing ring 53. Specific Embodiments

[0025] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.

[0026] Refer to Figure 1 、 2As shown in the figure, the tensile deep-sea cable optical fiber splicing box of the present utility model includes: a splicing box main body 1, an optical fiber rack 2, a small-thread sealing structure 3, an armored fastening structure 4, and a large-thread sealing structure 5; the optical fiber rack 2 is fixedly arranged inside the splicing box main body 1, and the optical fiber rack 2 is used for placing optical fiber heat shrinkable tubes; the small-thread sealing structure 3 is composed of two symmetrically arranged ones, and the two small-thread sealing structures 3 are respectively connected to both ends of the splicing box main body 1; the armored fastening structure 4 is arranged on the splicing box main body 1; the large-thread sealing structure 5 is arranged on the splicing box main body 1, and the large-thread sealing structure 5 is used for sealing the splicing box main body 1.

[0027] Referring to Figure 3 As shown in the figure, the splicing box main body 1 includes an intermediate box body 11, a tapered block 12, and an outer shell 13. The tapered block 12 is composed of two symmetrically arranged ones, and the two tapered blocks 12 are respectively arranged at both ends in the length direction of the intermediate box body 11. The outer shell 13 is sleeved outside the intermediate box body 11, and the outer shell 13 is sleeved on the tapered block 12. A large-thread sealing structure 5 is arranged between the outer shell 13 and the tapered block 12. The optical fiber rack 2 is fixedly arranged on the intermediate box body 11. The outer shell 13 is cylindrical.

[0028] In the above structure, one end of the tapered block 12 away from the splicing box main body 1 is provided with a tapered hole section 121. The small end of the tapered block 12 is provided with a first thread 122, and the large end of the tapered block 12 is provided with a second thread 123. The small end and the large end of the tapered block 12 are in a tapered transition structure. The end of the tapered block 12 extending into the splicing box main body 1 is provided with a circular ring connecting portion 124, and a first tapered surface 125 is arranged on the circular ring connecting portion 124.

[0029] Referring to Figure 4 As shown in the figure, the small-thread sealing structure 3 includes an outer nut 31, a small gasket 32, and a small tapered sealing ring 33. The outer nut 31 is connected to the first thread 122. One end of the small tapered sealing ring 33 close to the tapered block 12 is set to be tapered, and the tapered end of the small tapered sealing ring 33 is arranged in the tapered hole section 121. The small gasket 32 is arranged between the end surfaces of the small tapered sealing ring 33 in contact with the tapered block 12 and the outer nut 31 for sealing.

[0030] Referring to Figure 5 、 6 As shown in the figure, the armored fastening structure includes an armored pressing block 40 and a stainless steel pipe pressing block 42. A tapered block hole groove 120 is arranged inside the tapered block 12. The armored pressing block 40 is arranged in the tapered block hole groove 120, and the armored pressing block 40 and the inner end surface of the tapered block hole groove 120 are connected by fasteners. Connecting convex portions 111 are arranged at both ends of the intermediate box body 11. The stainless steel pipe pressing block 42 is locked on the connecting convex portions 111 by screws.

[0031] In the above structure, a first through hole 114 is provided on the connecting convex portion 111. A second connecting convex portion 41 is provided at the end of the tapered block 12. A second mounting hole 411 is provided on the second connecting convex portion 41. The first through hole 114 and the second mounting hole 411 are locked together by a fastener.

[0032] In the above structure, a groove 112 is provided on the connecting convex portion 111. The stainless steel tube pressing block 42 is arranged in the groove 112. A wire passing hole 113 is provided on the bottom surface of the groove 112. The wire passing hole 113 is communicated with the inside of the intermediate box body 11.

[0033] Refer to Figure 6 As shown, the large thread sealing structure 5 includes a large nut 51, a large gasket 52 and a large sealing ring 53. The large nut 51 is connected to the second thread 123. The large gasket 52 is arranged between the contact surfaces of the large nut 51 and the ring connection portion 124 for sealing. The large sealing ring 53 is sleeved on the first tapered surface 125, and the large sealing ring 53 is in contact with the inner wall of the outer shell 13. The large sealing ring 53 is circular, and the outer wall and the inner wall of the large sealing ring 53 are both tapered.

[0034] The specific installation steps of the tensile deep - sea optical cable fiber splicing box of the present utility model are as follows:

[0035] The outer nut 31, the small gasket 32, the small tapered sealing ring 33, the large nut 51, the large gasket 52, the large sealing ring 53 and the tapered block 12 are successively sleeved on two sections of optical cables. At the same time, the outer shell 13 is sleeved on the large end of the tapered block 12; the armored steel wires are dispersed in the second tapered hole section 126 of the tapered block 12, the armored pressing block 41 is pressed into the second tapered hole section 126 and fixed on the tapered block 12 with bolts; two sections of optical fibers are inserted into the intermediate box body 11, and the intermediate box body 11 and the tapered blocks 12 at both ends are fixed by a slotted external thread cylindrical locating pin. The stainless steel tube pressing block 42 is tightened against the optical cable stainless steel tube with screws and fixed on the intermediate box body 11; the spliced optical fiber heat - shrinkable tube is fixed on the optical fiber rack 2 with double - sided tape, and the optical fiber rack 2 is fixed on the intermediate box body 11 by threads; the optical fibers are wound and placed in the intermediate box body 11; the outer shell 13 is moved to be in close contact with the tapered block 12, the large sealing ring 53, the large gasket 52 and the large nut 51 are moved, and tightened with a crescent wrench. The above steps are repeated for the other end; the small tapered sealing rings 33, the small gaskets 32 and the outer nuts 31 at both ends are respectively moved to the tapered block 12 and tightened with a wrench; thus, the installation of the optical fiber splicing box is completed.

[0036] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of this utility model creation.

Claims

1. A tensile-resistant deepwater submarine cable optical fiber splicing box, characterized in that: include, The main body of the junction box; An optical fiber rack is fixedly arranged in the main body of the splicing box and is used to place the optical fiber heat shrink tube; Two small thread sealing structures are symmetrically arranged, and the two small thread sealing structures are respectively connected to the two ends of the connection box body; An armor fastening structure, which is arranged on the main body of the junction box; The large thread sealing structure is arranged on the connection box body and is used for sealing the connection box body.

2. The tensile-resistant deepwater submarine cable optical fiber splicing box according to claim 1 is characterized in that: The main body of the connection box includes an intermediate box body, a cone block and an outer shell. The cone blocks are two symmetrically arranged, and the two cone blocks are respectively arranged at the two ends of the length direction of the intermediate box body. The outer shell is sleeved on the outside of the intermediate box body, and the outer shell is sleeved on the cone block. A large thread sealing structure is provided between the outer shell and the cone block, and the optical fiber rack is fixedly arranged on the intermediate box body.

3. The tensile-resistant deepwater submarine cable optical fiber splicing box according to claim 2 is characterized in that: The shell is cylindrical.

4. The tensile-resistant deepwater submarine cable optical fiber splicing box according to claim 2 is characterized in that: A conical hole section is provided at one end of the cone block away from the connection box body, a first thread is provided at the small end of the cone block, a second thread is provided at the large end of the cone block, and a conical transition structure is formed between the small end of the cone block and the large end of the cone block.

5. The tensile-resistant deepwater submarine cable optical fiber splicing box according to claim 4 is characterized in that: The small thread sealing structure includes an external nut, a small gasket and a small conical sealing ring. The external nut is connected to the thread. The end of the small conical sealing ring close to the cone block is set to a cone, and the conical end of the small conical sealing ring is set in the conical hole section. The small gasket is set between the end faces of the cone block and the external nut that contact each other for sealing.

6. The tensile-resistant deepwater submarine cable optical fiber splicing box according to claim 4 is characterized in that: The end of the cone block extending into the main body of the connection box is provided with a circular ring connecting portion, and the circular ring connecting portion is provided with a conical surface 1.

7. The tensile-resistant deepwater submarine cable optical fiber splicing box according to claim 6 is characterized by: The armor fastening structure includes an armor pressing block and a stainless steel tube pressing block. A cone block hole groove is provided in the cone block. The armor pressing block is arranged in the cone block hole groove, and the armor pressing block and the inner end surface of the cone block hole groove are connected by fasteners. Connecting protrusions are provided at both ends of the intermediate box body, and the stainless steel tube pressing block is locked on the connecting protrusions by screws.

8. The tensile-resistant deepwater submarine cable optical fiber splicing box according to claim 7 is characterized in that: The connecting protrusion is provided with a groove, the stainless steel tube pressing block is arranged in the groove, and a wire passing hole is provided on the bottom surface of the groove, and the wire passing hole is communicated with the inside of the intermediate box body.

9. The tensile-resistant deepwater submarine cable optical fiber splicing box according to claim 6 is characterized by: The large thread sealing structure includes a large nut, a large gasket and a large sealing ring. The large nut is connected to thread two, the large gasket is arranged between the contact surface of the large nut and the circular ring connecting part for sealing, the large sealing ring is sleeved on the conical surface one, and the large sealing ring is in contact with the inner wall of the outer shell.

10. The tensile-resistant deepwater submarine cable optical fiber splicing box according to claim 9, characterized in that: The large sealing ring is in a circular ring shape, and the outer wall and the inner wall of the large sealing ring are both configured to be conical.

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