Waterproof and anti-corrosion optical cable splice closure

Abstract

The utility model relates to the technical field of optical cables, and provides a waterproof anti-corrosion optical cable splice closure, which comprises a stainless steel shell and a stainless steel cover plate, the stainless steel shell comprises an accommodating cavity, an optical fiber splice tray assembly is arranged in the accommodating cavity, a plurality of optical cable holes are arranged on the side wall of the stainless steel shell, and a plurality of cable cores penetrate through the optical cable holes in a one-to-one correspondence manner. The plurality of cable cores are all welded with the optical fiber splice tray assembly, and each cable core is hermetically connected with the stainless steel shell through one cable core sealing assembly; the stainless steel cover plate covers the accommodating cavity and is hermetically connected with the stainless steel shell; wherein the stainless steel shell and the stainless steel cover plate are both manufactured by integral punch forming, so that the junction box not only has good anti-corrosion performance and mechanical strength, but also is easy to process and manufacture, material waste and environmental pollution are reduced, and the requirements of industry development are met.

Description

Technical Field

[0001] This utility model relates to the field of optical cable technology, and in particular to a waterproof and corrosion-resistant optical cable splice box. Background Technology

[0002] With the rapid development of offshore wind power generation, inter-island power supply, and lake and river power supply industries, the stability and reliability requirements of optical cables, as an important component of communication systems, are increasing. Corrosion-resistant optical cable splice boxes, as devices specifically designed to connect and protect multiple optical cables from seawater corrosion and external damage, are widely used in wind turbine towers, substation platforms, oil and gas platforms, manholes, overhead lines, and onshore substations.

[0003] Currently, corrosion-resistant fiber optic cable splice boxes on the market are mainly divided into two types: plastic and metal. While plastic splice boxes offer some corrosion resistance, their strength and durability often fail to meet practical requirements in harsh marine environments, such as impacts from foreign objects, axial tension, immersion in rainwater and seawater, solar radiation, and underground burial conditions. This can easily lead to damage at the fiber optic cable connection, thus affecting the normal operation of the communication system. In contrast, metal corrosion-resistant fiber optic cable splice boxes excel in adaptability and durability, effectively coping with various harsh environments. However, these splice boxes are typically manufactured using machining, which is not only costly but also time-consuming, making it difficult to respond quickly to urgent delivery needs. Furthermore, the material waste and environmental pollution generated during machining cannot be ignored, contradicting the current advocacy of green environmental protection and sustainable development.

[0004] Therefore, it is particularly important to design a corrosion-resistant optical cable splice box that is both low-cost and has a short processing cycle, while meeting the requirements of harsh marine environments, in order to address the problems and defects in existing technologies. Utility Model Content

[0005] This utility model provides a waterproof and corrosion-resistant optical cable splice box to solve the problems of high processing costs, long processing cycles, and inability to meet the requirements of harsh marine environments in existing optical cable splice boxes.

[0006] This utility model provides a waterproof and corrosion-resistant optical cable splice box, comprising:

[0007] A stainless steel housing includes a receiving cavity, in which an optical fiber fusion splicing tray assembly is provided. The side wall of the stainless steel housing is provided with multiple optical cable holes, and multiple cable cores are inserted into the multiple optical cable holes one by one. The multiple cable cores are all fused to the optical fiber fusion splicing tray assembly, and each cable core is sealed to the stainless steel housing through a cable core sealing assembly.

[0008] A stainless steel cover plate covers the receiving cavity and is sealed to the stainless steel housing.

[0009] Both the stainless steel shell and the stainless steel cover plate are integrally stamped.

[0010] According to the waterproof and corrosion-resistant optical cable splice box of this utility model, the cable core sealing assembly includes a sealing bolt, a first fixing nut, and a first sealing ring. One end of the sealing bolt extends into the receiving cavity through the optical cable hole. The first fixing nut is screwed to the end of the sealing bolt that extends into the receiving cavity. The sealing bolt includes a first through hole. The cable core passes through the first through hole into the receiving cavity. The first sealing ring is sleeved on the cable core. The cable core is sealed to the inner wall of the sealing bolt through the first sealing ring.

[0011] The waterproof and corrosion-resistant optical cable splice box according to this utility model also includes a locking clamp, which is sleeved on the cable core. The outer wall of the locking clamp near the stainless steel shell is screwed to the inner wall of the first through hole, and the end face of the locking clamp near the stainless steel shell abuts against the end face of the first sealing ring away from the stainless steel shell.

[0012] According to the waterproof and corrosion-resistant optical cable splice box of this utility model, the cable core sealing assembly further includes a first gasket and a second gasket, the first gasket and the second gasket being located at both ends of the first sealing ring respectively;

[0013] The first through hole is a stepped hole, including a first sub-hole, a second sub-hole, and a third sub-hole arranged sequentially from the side near the receiving cavity to the side away from the receiving cavity, and the diameter of the holes from the first sub-hole to the third sub-hole increases sequentially. The first sealing ring is located in the second sub-hole, and one end of the first sealing ring abuts against the stepped surface between the first sub-hole and the second sub-hole through the first gasket, and the other end of the first sealing ring abuts against the end face of the locking clamp near the stainless steel housing through the second gasket.

[0014] According to the waterproof and corrosion-resistant optical cable splice box of this utility model, the cable core sealing assembly further includes a second sealing ring, and the sealing bolt includes a head and an external thread. The head is located on the outside of the stainless steel housing, and the external thread is located on the inside of the stainless steel housing. The diameter of the head is larger than the diameter of the optical cable hole, and a first groove surrounding the optical cable hole is provided on the inner end face of the head near the stainless steel housing. The second sealing ring is located in the first groove, and the inner end face of the head is sealed to the outer wall of the stainless steel housing through the second sealing ring.

[0015] According to the waterproof and corrosion-resistant optical cable splice box of this utility model, each of the cable cores is connected to the optical fiber fusion splice assembly through an electrical splicing component, the electrical splicing component including a copper crimp tube, a wiring nut, a bare fiber protection tube and a wiring screw;

[0016] The cable core includes a fusion splice end located within the receiving cavity. The fusion splice end includes an armored section, a steel tube section, and a bare fiber section. The copper crimp tube is sleeved on the armored section, the terminal nut is sleeved on the steel tube section, and the bare fiber protection tube is sleeved on the bare fiber section. Two ground wires are provided in the receiving cavity for each cable core. The two ground wires are respectively crimped into the copper crimp tube and the terminal nut by the terminal screw to realize the grounding connection of the cable core.

[0017] According to the waterproof and corrosion-resistant optical cable splice box of this utility model, the optical fiber fusion splice tray assembly includes a fusion splice tray, a fusion splice tray fixing component, and a fusion splice tray cover plate. The fusion splice tray and the fusion splice tray cover plate are stacked and arranged, and the fusion splice tray and the fusion splice tray cover plate are fixed to the bottom of the receiving cavity by the fusion splice tray fixing component. The bare fiber part is fused to the fusion splice tray.

[0018] According to the waterproof and corrosion-resistant optical cable splice box of this utility model, the stainless steel shell is further provided with a ground wire hole, a gland is installed on the ground wire hole, and the ground wire passes through the ground wire hole through the gland.

[0019] According to the waterproof and corrosion-resistant optical cable splice box of this utility model, a plug assembly is installed on the optical cable holes in which the cable core is not inserted. The plug assembly includes a plug, a second fixing nut and a third sealing ring.

[0020] The plug includes a threaded end and a non-threaded end. The threaded end passes through the optical cable hole into the receiving cavity and is screwed to the second fixing nut. The non-threaded end is located on the outside of the stainless steel housing, and the non-threaded end has a flange along its circumference. The inner end face of the flange near the stainless steel housing has a second groove surrounding the optical cable hole. The third sealing ring is located in the second groove, and the inner end face of the flange is sealed to the outer wall of the stainless steel housing through the third sealing ring.

[0021] According to the waterproof and corrosion-resistant optical cable splice box of this utility model, the stainless steel shell and the stainless steel cover plate are sealed and connected by a fourth sealing ring.

[0022] The above-mentioned technical solution of this utility model has the following beneficial effects:

[0023] This utility model's waterproof and corrosion-resistant optical cable splice box, by using a stainless steel shell and stainless steel cover plate, and connecting them with corresponding sealing components, gives the splice box excellent corrosion resistance and mechanical strength, enabling the product to be used in harsh environments. Furthermore, the stainless steel shell and stainless steel cover plate are both integrally stamped, which not only reduces waste generation and lowers production costs, but also makes it easy to process and manufacture, shortening the processing cycle, thereby meeting the needs of industry development. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of the waterproof and corrosion-resistant optical cable splice box provided in this embodiment of the utility model;

[0026] Figure 2 for Figure 1 The right partial cross-sectional view of the waterproof and corrosion-resistant optical cable splice box shown in the figure;

[0027] Figure 3 for Figure 1 A cross-sectional schematic diagram of the cable core sealing assembly shown;

[0028] Figure 4 for Figure 1 An enlarged schematic diagram of the electrical connection assembly shown;

[0029] Figure 5 A cross-sectional schematic diagram of the plug assembly provided in an embodiment of this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the gland provided in an embodiment of the present utility model.

[0031] Figure label:

[0032] 1-Stainless steel housing; 2-Stainless steel cover plate; 3-Fourth sealing ring; 4-Cable core sealing assembly; 4.1-Sealing bolt; 4.2-First gasket; 4.3-First sealing ring; 4.4-Second gasket; 4.5-First fixing nut; 4.6-Second sealing ring; 4.11-First through hole; 4.12-Head; 4.13-External thread; 4.14-First slot; 5-Fiber optic splicing tray assembly; 5.1-Spyringe tray; 5.2-Spyringe tray fixing component; 5.3-Fiber... Fiber reel cover; 6-Electrical connection assembly; 6.1-Copper crimp tube; 6.2-Connecting nut; 6.3-Bare fiber protection tube; 6.4-Connecting screw; 7-Shell fixing plate; 8-Clamping plate; 9-Plug; 9.1-Flange; 9.2-Second slot; 10-Second fixing nut; 11-Third sealing ring; 12-Glans head; 13-Fastening structure; 14-Locking clamp; 15-Cable core; 15.1-Armored section; 15.2-Steel pipe section; 15.3-Bare fiber section; 16-Ground wire. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] See Figure 1 This utility model provides a waterproof and corrosion-resistant optical cable splice box, including a stainless steel shell 1 and a stainless steel cover plate 2. The stainless steel shell 1 includes a receiving cavity, in which an optical fiber fusion splice tray assembly 5 is installed. Multiple optical cable holes are provided on the side wall of the stainless steel shell 1, communicating with the receiving cavity. Multiple cable cores 15 are correspondingly inserted into the multiple optical cable holes, and each cable core 15 is fused to the optical fiber fusion splice tray assembly 5. Each cable core 15 is sealed to the stainless steel shell 1 through a cable core sealing assembly 4, ensuring the airtightness of the cable core 15 installation. The stainless steel cover plate 2 covers the receiving cavity and is sealed to the stainless steel shell 1 through a fourth sealing ring 3, thereby further enhancing the sealing performance of the splice box.

[0035] Both the stainless steel shell 1 and the stainless steel cover plate 2 are made of stainless steel (such as 316L stainless steel), giving the splice box high strength and good corrosion resistance. The stainless steel shell 1 and the stainless steel cover plate 2, as well as the cable core 15 and the stainless steel shell 1, are sealed together to ensure the splice box's airtightness, protecting its interior from moisture and further enhancing its corrosion resistance. Furthermore, both the stainless steel shell 1 and the stainless steel cover plate 2 are integrally stamped. Compared to machining, this splice box reduces waste, lowers production costs, and is more environmentally friendly. The shorter production cycle allows for large-scale stock production, and the processing speed is more than three times that of machining, thus meeting the needs of industry development.

[0036] See Figure 3 Specifically, the cable core sealing assembly 4 includes a sealing bolt 4.1, a first fixing nut 4.5, and a first sealing ring 4.3. One end of the sealing bolt 4.1 extends into the receiving cavity through the optical cable hole. The first fixing nut 4.5 is screwed onto the end of the sealing bolt 4.1 that extends into the receiving cavity, thereby securing the cable core sealing assembly 4 to the stainless steel housing 1. The sealing bolt 4.1 includes a first through hole 4.11. The cable core 15 passes through the first through hole 4.11 into the receiving cavity. The first sealing ring 4.3 is sleeved on the cable core 15. The cable core 15 is sealed to the inner wall of the sealing bolt 4.1 through the first sealing ring 4.3, thereby ensuring the airtightness between the cable core 15 and the cable core sealing assembly 4.

[0037] Furthermore, the waterproof and corrosion-resistant optical cable splice box also includes a locking clamp 14. Each cable core sealing assembly 4 is connected to a corresponding locking clamp 14. The locking clamp 14 is sleeved on the cable core 15. The outer wall of the locking clamp 14 near the stainless steel housing 1 is screwed to the inner wall of the first through hole 4.11, and the end face of the locking clamp 14 near the stainless steel housing 1 abuts against the end face of the first sealing ring 4.3 away from the stainless steel housing 1. The locking clamp 14 can lock and fix the cable core 15 to prevent the cable core 15 from moving or loosening during use, thus ensuring the stability and reliability of the cable core 15.

[0038] Furthermore, the cable core sealing assembly 4 also includes a first gasket 4.2 and a second gasket 4.4, both of which are inserted through the cable core 15, and the first gasket 4.2 and the second gasket 4.4 are located at both ends of the first sealing ring 4.3 respectively.

[0039] The first through hole 4.11 is a stepped hole, including a first sub-hole, a second sub-hole, and a third sub-hole arranged sequentially from the side closest to the receiving cavity to the side furthest from the receiving cavity. The diameter of the holes increases sequentially from the first sub-hole to the third sub-hole. The first sealing ring 4.3 is located in the second sub-hole, and one end of the first sealing ring 4.3 abuts against the stepped surface between the first sub-hole and the second sub-hole through the first gasket 4.2. The other end of the first sealing ring 4.3 abuts against the end face of the locking clamp 14 near the stainless steel housing 1 through the second gasket 4.4. The stepped surface design of the first through hole 4.11 can limit the positions of the first gasket 4.2, the first sealing ring 4.3, and the second gasket 4.4 within the first through hole 4.11. The first gasket 4.2 and the second gasket 4.4 are located at both ends of the first sealing ring 4.3, which can ensure that the locking clamp 14 is connected to the sealing bolt 4.1 without damaging the first sealing ring 4.3, thereby ensuring the sealing effectiveness of the first sealing ring 4.3.

[0040] The sealing bolt 4.1 includes a head 4.12 and an external threaded portion 4.13. The head 4.12 is located on the outside of the stainless steel housing 1, and the external threaded portion 4.13 is located on the inside of the stainless steel housing 1. The diameter of the external threaded portion 4.13 is smaller than the diameter of the optical cable hole, and the diameter of the head 4.12 is larger than the diameter of the optical cable hole. This allows the stainless steel housing 1 around the optical cable hole to be clamped between the first fixing nut 4.5 and the head 4.12 after the first fixing nut 4.5 is screwed into the external threaded portion 4.13. The end of the sealing bolt 4.1 away from the first fixing nut 4.5 has an internal thread in the third sub-hole, and the outer wall of the locking clamp 14 near the stainless steel housing 1 has an external thread, thereby achieving the screwing connection between the locking clamp 14 and the sealing bolt 4.1.

[0041] Furthermore, the cable core sealing assembly 4 also includes a second sealing ring 4.6. The inner end face of the head 4.12 of the sealing bolt 4.1 near the stainless steel housing 1 is provided with a first groove 4.14 surrounding the optical cable hole. The second sealing ring 4.6 is located in the first groove 4.14. The inner end face of the head 4.12 is sealed to the outer wall of the stainless steel housing 1 through the second sealing ring 4.6, thereby ensuring the airtightness of the connection between the cable core sealing assembly 4 and the stainless steel housing 1.

[0042] See Figure 1 and Figure 4Each cable core 15 is connected to the fiber optic fusion splice tray assembly 5 via an electrical splicing assembly 6. The fiber optic fusion splice tray assembly 5 allows the optical fibers in one cable core 15 to be spliced ​​with those in other cable cores 15, thereby achieving continuous transmission between optical cables. The electrical splicing assembly 6 includes a copper crimp tube 6.1, a terminal nut 6.2, a bare fiber protection tube 6.3, and a terminal screw 6.4. The cable core 15 includes a splice end located within a receiving cavity. The splice end includes an armored part 15.1, a steel tube part 15.2, and a bare fiber part 15.3. The steel tube part 15.2 and the armored part 15.1 are sequentially sleeved onto the optical fibers in the cable core 15 for protection. The copper crimp tube 6.1 is fitted onto the armored section 15.1, the wiring nut 6.2 is fitted onto the steel pipe section 15.2, and the bare fiber protection tube 6.3 is fitted onto the bare fiber section 15.3. Two ground wires 16 are provided in the cavity corresponding to each cable core 15. The two ground wires 16 are respectively crimped into the copper crimp tube 6.1 and the wiring nut 6.2 by the wiring screw 6.4, so as to realize the grounding connection between the cable core 15 and the main ground busbar or grounding busbar, ensure the safe operation of the optical cable, prevent damage to the optical cable by natural factors such as lightning, and reduce the impact of electromagnetic interference on signal transmission.

[0043] See Figure 1 and Figure 2 The fiber optic fusion splice tray assembly 5 includes a fusion tray 5.1, a fusion tray fixing component 5.2 (such as a fusion tray fixing nut), and a fusion tray cover plate 5.3. The fusion tray 5.1 and the fusion tray cover plate 5.3 are stacked and fixed to the bottom of the receiving cavity by the fusion tray fixing component 5.2 to prevent the fusion tray 5.1 and the fusion tray cover plate 5.3 from moving arbitrarily. The bare fiber portion 15.3 of the cable core 15 is fused on the fusion tray 5.1. The number of fusion trays 5.1 and fusion tray cover plates 5.3 can be determined according to the actual situation and is not limited here.

[0044] See Figure 1 , Figure 2 and Figure 6 Furthermore, the stainless steel housing 1 is also provided with a grounding hole, and a gland 12 is installed on the grounding hole. The grounding wire 16 passes through the grounding hole through the gland 12. The gland 12 is not only used to fasten the grounding wire 16 to securely fix the grounding wire 16 to the junction box, but also to seal the grounding hole to prevent moisture, dust and other harmful substances from entering the junction box.

[0045] Each locking clamp 14 is also provided with a clamping piece 8, which is clamped between the locking clamp 14 and the cable core 15. The clamping piece 8 is used to fix the cable core 15. The locking clamp 14 and the clamping piece 8 are fastened together with fasteners to prevent the cable core 15 from moving or loosening during use.

[0046] The stainless steel housing 1 is also provided with a housing fixing plate 7, which is used to firmly fix the stainless steel housing 1 of the splice box in a proper position, ensuring that the splice box will not move or shake during use, thereby ensuring the stability and safety of the optical cable connector.

[0047] See Figure 2 and Figure 5 Furthermore, plug assemblies are installed on the optical cable holes in which the cable core 15 is not inserted. The plug assemblies are used to seal the unused optical cable holes or optical cable ports in the optical cable splice box, which can prevent dust, moisture, insects and other contaminants from entering the splice box, thereby protecting the optical cable system from pollution and damage.

[0048] Specifically, the plug assembly includes a plug 9, a second fixing nut 10, and a third sealing ring 11. The plug 9 includes a threaded end and a non-threaded end. The threaded end passes through the optical cable hole into the receiving cavity and is screwed to the second fixing nut 10. The non-threaded end is located on the outside of the stainless steel housing 1, and the non-threaded end is provided with a flange 9.1 along its circumference. The inner end face of the flange 9.1 near the stainless steel housing 1 is provided with a second groove 9.2 surrounding the optical cable hole. The third sealing ring 11 is located in the second groove 9.2, and the inner end face of the flange 9.1 is sealed to the outer wall of the stainless steel housing 1 through the third sealing ring 11.

[0049] See Figures 1-6 The installation process of the optical cable splice box of this utility model is as follows:

[0050] Cable core installation: First, sequentially insert the locking clamp 14, second washer 4.4, first sealing ring 4.3, and first washer 4.2 onto the cable core 15. Then, insert the second sealing ring 4.6 into the first slot 4.14 of the sealing bolt 4.1, screw the external thread 4.13 of the sealing bolt 4.1 into the stainless steel housing 1, and tighten it with the first fixing nut 4.5 to form a double-nut fixation. Next, insert the cable core 15 into the sealing bolt 4.1, and sequentially insert the first washer 4.2, first sealing ring 4.3, and second washer 4.4 into the first through hole 4.11 of the sealing bolt 4.1. Then, screw the locking clamp 14 into the sealing screw 4.1 to form a cable core seal. Finally, place the clamp 8 into the locking clamp 14 and tighten it with fasteners.

[0051] Plug installation: Insert the third sealing ring 11 into the second groove 9.2 of the plug 9, then screw the threaded end of the plug 9 into the stainless steel housing 1, and lock it with the second fixing nut 10 to form a double nut fixation.

[0052] Electrical connection installation: First, use the copper crimp tube 6.1 to fit into the armored part 15.1 of the cable core 15, and connect one ground wire 16 to the copper crimp tube 6.1, and tighten it with the terminal screw 6.4; then, use the terminal nut 6.2 to fit into the steel tube part 15.2 of the cable core 15, and connect the other ground wire 16 to the terminal nut 6.2, and tighten it with the terminal screw 6.4; finally, use the gland 12 to pass the crimped ground wire 16 through the ground wire hole on the stainless steel housing 1. The gland 12 can seal the ground wire hole to complete the ground wire sealing treatment.

[0053] Fiber optic fusion splice tray assembly installation: First, place the bottom fusion splice tray 5.1 into the fixing rod position within the receiving cavity to complete the fiber splice. Then, cover the fusion splice tray 5.1 with the bottom fusion splice tray cover plate 5.3 and use the fusion splice tray fixing piece 5.2 to press the fusion splice tray 5.1 firmly. Next, place the second-layer fusion splice tray 5.1 into the fixing rod position within the receiving cavity, stacking it with the bottom fusion splice tray 5.1 to complete the fiber splice. Cover the fusion splice tray 5.1 with the second-layer fusion splice tray cover plate 5.3 and use the fusion splice tray fixing piece 5.2 to press the fusion splice tray 5.1 firmly. Then, place the third-layer fusion splice tray 5.1 into the fixing rod position within the receiving cavity, stacking it with the second-layer fusion splice tray 5.1 to complete the fiber splice. Cover the fusion splice tray 5.1 with the third-layer fusion splice tray cover plate 5.3 and use the fusion splice tray fixing piece 5.2 to press the fusion splice tray cover plate 5.3 firmly, completing the installation.

[0054] Sealing of the junction box: Place the fourth sealing ring 3 into the stainless steel housing 1, then cover it with the stainless steel cover plate 2, and tighten the stainless steel housing 1 and the stainless steel cover plate 2 with the fastening structure 13 (such as bolts and nuts) to complete the sealing of the junction box.

[0055] This utility model's waterproof and corrosion-resistant optical cable splice box, by using a stainless steel shell and stainless steel cover plate, and connecting them with corresponding sealing components, gives the splice box excellent corrosion resistance and mechanical strength, enabling the product to be used in harsh environments. Furthermore, the stainless steel shell and stainless steel cover plate are both integrally stamped, which not only reduces waste generation and lowers production costs, but also makes it easy to process and manufacture, shortening the processing cycle, thereby meeting the needs of industry development.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A waterproof and corrosion-resistant optical cable splice box, characterized in that, include: A stainless steel housing includes a receiving cavity, in which an optical fiber fusion splicing tray assembly is provided. The side wall of the stainless steel housing is provided with multiple optical cable holes, and multiple cable cores are inserted into the multiple optical cable holes one by one. The multiple cable cores are all fused to the optical fiber fusion splicing tray assembly, and each cable core is sealed to the stainless steel housing through a cable core sealing assembly. A stainless steel cover plate covers the receiving cavity and is sealed to the stainless steel housing. Both the stainless steel shell and the stainless steel cover plate are integrally stamped.

2. The waterproof and corrosion-resistant optical cable splice box according to claim 1, characterized in that, The cable core sealing assembly includes a sealing bolt, a first fixing nut, and a first sealing ring. One end of the sealing bolt extends into the receiving cavity through the optical cable hole. The first fixing nut is screwed to the end of the sealing bolt that extends into the receiving cavity. The sealing bolt includes a first through hole. The cable core passes through the first through hole into the receiving cavity. The first sealing ring is sleeved on the cable core. The cable core is sealed to the inner wall of the sealing bolt through the first sealing ring.

3. The waterproof and corrosion-resistant optical cable splice box according to claim 2, characterized in that, It also includes a locking clamp, which is sleeved on the cable core. The outer wall of the locking clamp near the stainless steel housing is screwed to the inner wall of the first through hole, and the end face of the locking clamp near the stainless steel housing abuts against the end face of the first sealing ring away from the stainless steel housing.

4. The waterproof and corrosion-resistant optical cable splice box according to claim 3, characterized in that, The cable core sealing assembly further includes a first gasket and a second gasket, the first gasket and the second gasket being located at both ends of the first sealing ring, respectively; The first through hole is a stepped hole, including a first sub-hole, a second sub-hole, and a third sub-hole arranged sequentially from the side near the receiving cavity to the side away from the receiving cavity, and the diameter of the holes from the first sub-hole to the third sub-hole increases sequentially. The first sealing ring is located in the second sub-hole, and one end of the first sealing ring abuts against the stepped surface between the first sub-hole and the second sub-hole through the first gasket, and the other end of the first sealing ring abuts against the end face of the locking clamp near the stainless steel housing through the second gasket.

5. The waterproof and corrosion-resistant optical cable splice box according to claim 2, characterized in that, The cable core sealing assembly further includes a second sealing ring. The sealing bolt includes a head and an external thread. The head is located on the outside of the stainless steel housing, and the external thread is located on the inside of the stainless steel housing. The diameter of the head is larger than the diameter of the optical cable hole. A first groove surrounding the optical cable hole is provided on the inner end face of the head near the stainless steel housing. The second sealing ring is located in the first groove. The inner end face of the head is sealed to the outer wall of the stainless steel housing through the second sealing ring.

6. The waterproof and corrosion-resistant optical cable splice box according to claim 1, characterized in that, Each of the cable cores is connected to the optical fiber fusion splice assembly via an electrical splicing assembly, the electrical splicing assembly including a copper crimp tube, a wiring nut, a bare fiber protection tube, and a wiring screw; The cable core includes a fusion splice end located within the receiving cavity. The fusion splice end includes an armored section, a steel tube section, and a bare fiber section. The copper crimp tube is sleeved on the armored section, the terminal nut is sleeved on the steel tube section, and the bare fiber protection tube is sleeved on the bare fiber section. Two ground wires are provided in the receiving cavity for each cable core. The two ground wires are respectively crimped into the copper crimp tube and the terminal nut by the terminal screw to realize the grounding connection of the cable core.

7. The waterproof and corrosion-resistant optical cable splice box according to claim 6, characterized in that, The fiber optic fusion splice tray assembly includes a fusion splice tray, a fusion splice tray fixing component, and a fusion splice tray cover plate. The fusion splice tray and the fusion splice tray cover plate are stacked and fixed to the bottom of the receiving cavity by the fusion splice tray fixing component. The bare fiber portion is fused to the fusion splice tray.

8. The waterproof and corrosion-resistant optical cable splice box according to claim 6, characterized in that, The stainless steel housing is also provided with a grounding hole, and a gland is installed on the grounding hole. The ground wire passes through the grounding hole via the gland.

9. The waterproof and corrosion-resistant optical cable splice box according to claim 1, characterized in that, A plug assembly is installed on the optical cable holes in which the cable core is not inserted. The plug assembly includes a plug, a second fixing nut and a third sealing ring. The plug includes a threaded end and a non-threaded end. The threaded end passes through the optical cable hole into the receiving cavity and is screwed to the second fixing nut. The non-threaded end is located on the outside of the stainless steel housing, and the non-threaded end has a flange along its circumference. The inner end face of the flange near the stainless steel housing has a second groove surrounding the optical cable hole. The third sealing ring is located in the second groove, and the inner end face of the flange is sealed to the outer wall of the stainless steel housing through the third sealing ring.

10. The waterproof and corrosion-resistant optical cable splice box according to claim 1, characterized in that, The stainless steel shell and the stainless steel cover plate are sealed together by a fourth sealing ring.

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