A watertight optical terminal and its assembling method

Abstract

The application relates to a water-tight optical terminal and an assembling method thereof. The water-tight optical terminal comprises a water-tight box body and a water-tight cover plate fixed on the top of the water-tight box body. The water-tight box body comprises a photoelectric conversion plate I fixing layer, a photoelectric conversion plate II fixing layer, a power module for supplying power to the photoelectric conversion plate I and the photoelectric conversion plate II, a switching module for switching and distributing the power signals in the water-tight optical terminal, and a wavelength division multiplexer fixing layer for combining the multiple light signals converted by the photoelectric conversion plates into one light signal. A water-tight panel connector corresponding to each layer is fixed on the wall of one side of the water-tight box body. The water-tight optical terminal can bear the water pressure of 0.5MPa, can normally work under the water depth of 50m without an additional water-tight cabin, is flexible and convenient to use, has low cost, and is convenient to popularize and use.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of optical terminal, and particularly relates to a watertight optical terminal. BACKGROUND

[0002] Prior art and defects: with the popularization of optical fiber, the application of optical terminal is more and more extensive, and various optical terminals are widely applied in aviation, aerospace, ships and other fields. At present, some types of optical terminal can realize the rain-proof level to adapt to the harsh natural environment, but cannot realize the deep water sealing function. When underwater operation is needed, it needs to be put into a special sealed cabin for use, and the sealed cabin is expensive, has poor expandability and is not flexible enough to use. SUMMARY

[0003] Based on the above problems, the application designs a watertight optical terminal which can normally work under 50 meters of water depth and withstand water pressure of 0.5 MPa.

[0004] The purpose of the application and the technical problems thereof are realized by adopting the following technical scheme. According to the watertight optical terminal provided by the application, the watertight optical terminal comprises a watertight box body and a watertight cover plate fixed on the top of the watertight box body. The watertight box body comprises an optical-electricity conversion plate I fixed layer, an optical-electricity conversion plate II fixed layer, a power module for supplying power to the optical-electricity conversion plate I and the optical-electricity conversion plate II, a switching module for switching and distributing the power signal in the watertight optical terminal, and a wavelength division multiplexer fixed layer for combining the multiple optical signals converted by the optical-electricity conversion plate into one optical signal. A watertight panel connector corresponding to each layer is fixed on the wall of one side of the watertight box body.

[0005] The purpose of the application and the technical problems thereof can also be further realized by adopting the following technical measures.

[0006] The aforementioned watertight optical terminal, wherein the optical-electricity conversion plate I has three blocks, and converts three 1000M Ethernet electrical signals into three optical signals; the optical-electricity conversion plate II converts five PAL videos, six RS485s, two encoders and three passive switch signals into one optical signal; and the four converted optical signals are combined into one optical signal by the wavelength division multiplexer and transmitted by a single-core optical fiber.

[0007] The aforementioned watertight optical terminal, wherein two supporting plates for layering the internal space of the watertight box body are arranged in the watertight box body, and the components on the upper two layers are installed on the corresponding supporting plates. The supporting switching plate fixed on the side plate of the box body provides support for the supporting plates and realizes the vertical installation and fastening of the supporting plate fixing screws.

[0008] The watertight optical terminal as claimed in the preceding claim, wherein the distance between the upper two support adapter plates is greater than the distance between the lower two support adapter plates, and the lower support plate can pass through the space between the upper support adapter plates but is supported and fixed by the lower support adapter plates.

[0009] The watertight optical terminal as claimed in the preceding claim, wherein the support adapter plates are each inlaid in a groove on the side plate of the box and fixed by horizontal screws.

[0010] The watertight optical terminal as claimed in the preceding claim, wherein the watertight box is formed by welding a front panel, a rear panel, a left side plate, a right side plate, a lower bottom plate and an upper welding plate, and each welding surface has a cutoff surface on the inner side thereof for blocking the welding seam on the inner side thereof to prevent welding marks from entering the box.

[0011] The watertight optical terminal as claimed in the preceding claim, wherein the lower bottom plate is integrally formed with a surrounding frame, the inner side of the upper end surface of the surrounding frame is provided with a cutoff surface, and the inner side of the surface where the bottom of the front panel, the rear panel, the left side plate and the right side plate is welded to the surrounding frame is provided with a groove matching the cutoff surface.

[0012] The watertight optical terminal as claimed in the preceding claim, wherein the upper welding plate is in the form of a frame structure, the inner side of the lower end surface of the upper welding plate is provided with a cutoff surface at the joint with the upper end surface of the front panel, the rear panel, the left side plate and the right side plate, and the upper end surface is provided with a rectangular groove for mounting an O-ring for sealing between the upper welding plate and the watertight cover plate.

[0013] The watertight optical terminal as claimed in the preceding claim, wherein the watertight cover plate is provided with a ring groove matching the upper end surface of the upper welding plate, and the outer side wall of the ring groove matches the groove on the outer circle of the upper end surface of the cover plate.

[0014] The object and technical problem of the present application can also be achieved by the following technical solution. The present application provides an assembling method of a water-tight optical terminal, comprising the following steps: 1) welding a front panel, a rear panel, a left side panel, a right side panel, a lower bottom panel and an upper welding panel to form a water-tight box body, and performing a radiation detection after welding to ensure that there is no welding seam defect before the next process, and then performing supplementary processing and finishing; 2) performing a 0.5 MPa water pressure test on the water-tight box body after installing and fastening a water-tight cover plate and the water-tight box body, and blocking the panel connector mounting hole with a panel connector plug; 3) separating the water-tight cover plate and the water-tight box body after the water pressure test, and installing and fixing a power module, a switching module, a wavelength division multiplexer layer, an optical-electricity conversion board II layer and an optical-electricity conversion board I layer in the box body from bottom to top; 4) fixing the water-tight panel connectors corresponding to the layers to the corresponding positions of the side panels of the water-tight box body, and connecting the water-tight panel connectors with the corresponding layer assemblies; and 5) finally sealing and fixing the water-tight cover plate on the water-tight box body and performing a 0.5 MPa water pressure test again, and the assembling of the water-tight optical terminal is completed when the test is qualified.

[0015] Compared with the prior art, the present application has obvious advantages and beneficial effects. By the above technical solution, the present application has considerable technical progress and practicability, and has wide industrial utilization value, and at least has the following advantages: the water-tight optical terminal of the present application can withstand a water pressure of 0.5 MPa, can normally work at a water depth of 50 meters under water without an additional water-tight cabin, is flexible and convenient to use, has low cost, and is convenient to popularize and use. The water-tight optical terminal of the present application has good sealing effect, simple and reasonable structure, reasonable layout, and the supporting plate and the supporting switching plate for bearing have good bearing capacity and safe and stable characteristics through reasonable arrangement. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 is a front view of the water-tight optical terminal of the present application;

[0017] Figure 2 Fig. 2 is a side view of the water-tight optical terminal of the present application;

[0018] Figure 3 Fig. 3 is a front view of a water-tight box of the water-tight optical terminal of the present application;

[0019] Figure 4 Fig. 4 is a side view of the water-tight box of the water-tight optical terminal of the present application.

[0020] MAIN ELEMENT SYMBOL EXPLANATION

[0021] 1. water-tight box body

[0022] 2. water-tight cover plate

[0023] 3. cover plate O-ring

[0024] 4. Photoelectric conversion board I

[0025] 5. Photoelectric conversion board II

[0026] 6. Pallet I

[0027] 7. Pallet II

[0028] 8. Follow the lines

[0029] 9. Support Adapter Plate I

[0030] 10. Support Adapter Plate II

[0031] 11. Adapter Module

[0032] 12. Power Module

[0033] 13: Screws

[0034] 14: Watertight panel connector

[0035] 15: O-ring

[0036] 16: Wavelength Division Multiplexer

[0037] 17: Cutoff plane Detailed Implementation

[0038] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description of the specific implementation, structure, features and effects of the watertight optical transceiver proposed according to the present invention is provided in conjunction with the accompanying drawings and preferred embodiments.

[0039] Please see Figures 1-4It is a structure diagram of each part of the water-tight optical terminal, which comprises a water-tight box 1 and a water-tight cover plate 2 fixed on the top of the water-tight box 1. The water-tight box 1 is divided into three layers from top to bottom by a supporting plate I 6 and a supporting plate II 7 for fixing an optical-electricity conversion plate I 4 and an optical-electricity conversion plate II 5 respectively. A power module 12 for supplying power to the optical-electricity conversion plate I 4 and the optical-electricity conversion plate II 5, a switching module 11 for switching and distributing the power signal in the water-tight optical terminal and a wavelength division multiplexer 16 for combining the converted multi-channel optical signals into one channel optical signal are all located in the bottom space of the water-tight box 1 and fixed on the bottom plate of the box. A water-tight panel connector 14 for connecting the components in the space through a cable is arranged on the wall of one side of the water-tight box 1 at a position corresponding to each space. A sealing device is arranged between the water-tight panel connector and the water-tight box. In the embodiment of the present application, an O-ring 15 is arranged between the water-tight panel connector and the water-tight box for sealing. Specifically, the O-ring 15 is embedded on the rear end surface of the flange plate of the water-tight panel connector. The components in the three spaces of the water-tight box can be exchanged in whole layer, and the position of the water-tight panel connector matched with the components in the layer is also exchanged correspondingly. A wire running strip 8 is arranged on the inner wall of the water-tight box for wire running.

[0040] The optical-electricity conversion plate I 4 has three blocks, which can realize the electricity-optical conversion of three 1000M Ethernet signals and convert the three 1000M Ethernet signals into three optical signals. The optical-electricity conversion plate II 5 realizes the electricity-optical conversion of five PAL video signals, six RS485 signals, two encoder signals and three passive switch signals and converts the five PAL video signals, the six RS485 signals, the two encoder signals and the three passive switch signals into one optical signal. The four converted optical signals are combined into one optical signal by the wavelength division multiplexer and transmitted by one single-core optical fiber. The three optical-electricity conversion plate I 4 and the optical-electricity conversion plate II 5 are powered by the power module during the working process of the water-tight optical terminal. The switching module realizes the switching and distribution of the power signal in the water-tight optical terminal.

[0041] The sealing of the water-tight optical terminal is divided into four parts, including the sealing between the parts of the water-tight box, the sealing between the water-tight box and the water-tight cover plate, the sealing between the water-tight box and the panel connector and the sealing between the panel connector and the corresponding plug water-tight assembly. The sealing between the panel connector and the corresponding plug water-tight assembly is not described in detail in the present patent, and the sealing structures of the first three parts will be introduced.

[0042] The watertight box body is welded by welding front panel, welding back panel, welding left side plate, welding right side plate, welding lower bottom plate and upper welding plate, and after welding, ray detection is carried out to ensure that there is no welding seam defect before the next process, and then supplementary processing and finishing are carried out. In order to prevent the welding of each part of the watertight box body from affecting the internal cavity of the box body, such as causing welding marks inside the box body, the inner side of each part connecting surface is provided with a stop surface 17 for stopping inside the welding seam to prevent welding marks from entering the box body. In the embodiment of the present application, a surrounding frame is integrally formed on the welding lower bottom plate, and the inner side of the upper end surface of the surrounding frame is provided with a stop surface 17, and the inner side of the surface where the welding front panel, welding back panel, welding left side plate and welding right side plate are welded to the surrounding frame is provided with a groove matched with the stop surface 17.

[0043] The upper welding plate is in a frame structure, and the inner side of the lower end surface of the upper welding plate is provided with a stop surface 17 at the connecting part between the upper end surface of the welding front panel, welding back panel, welding left side plate and welding right side plate, which stops inside the above connecting part to prevent the internal cavity of the box body from being affected during welding. The upper welding plate of the present application is welded on the top of the welding front panel, welding back panel, welding left side plate and welding right side plate, and a rectangular groove is formed on the upper end surface of the upper welding plate for installing a cover O-ring 3 for sealing between the upper welding plate and the watertight cover plate 2. The profile of the cover O-ring 3 is rectangular, and the O-ring is installed in the rectangular groove on the upper welding plate of the watertight box body. After tightening the watertight cover plate, the O-ring is compressed inward together with the external water pressure to fill the gap between the watertight cover plate and the watertight box body, realizing the sealing function.

[0044] The setting of the upper welding plate of the present application can connect the welding front panel, welding back panel, welding left side plate and welding right side plate, and can avoid opening a sealing groove at the welding seam, preventing the damage of the groove to the welding part and affecting the welding reliability.

[0045] An annular groove is formed on the watertight cover plate 2, which is matched with the concave-convex of the upper end surface of the upper welding plate. The outer side wall of the annular groove is matched with the groove of the outer circle of the upper end surface of the upper cover plate, that is, the surface connected between the watertight cover plate and the upper welding plate is a stepped surface rising from outside to inside. In order to enter the box body from the connection between the watertight cover plate and the upper welding plate, the liquid outside the box body needs to pass through the stepped surface, and the last step is the part with a rectangular groove on the inner side of the upper end surface of the upper welding plate. The cover O-ring 3 with the groove can prevent the liquid from penetrating further inward, realizing reliable sealing.

[0046] The watertight cover plate and the watertight box body are fastened by screws, and then a 0.5MPa water pressure test is conducted on the watertight box body by cooperating with a tool (a panel connector plug for plugging the panel connector mounting hole), and the next step is conducted after the test is passed. The sealing between the panel connector and the corresponding plug watertight assembly is also realized by the O-ring of the connector. After the product is completely assembled, a 0.5MPa water pressure test will be conducted again, and the design can realize the normal operation of the optical transceiver in 50 meters of water depth.

[0047] The watertight box body is divided into three layers in general. Due to the characteristics of the watertight box body, only the watertight cover plate can be opened, and the assembly sequence is to assemble the lower layer first and then assemble upwards. From bottom to top, the layers are as follows: the power module, the adapter module and the wavelength division multiplexer in the lowermost layer are directly fixed on the welded lower bottom plate of the watertight box body by screws; the photoelectric conversion II is installed on the support plate II and then integrally fixed on the support adapter plate II; the photoelectric conversion plate I is installed on the support plate I and then integrally fixed on the support adapter plate I. The support adapter plate I and the support adapter plate II are similar in structure, and provide support for the support plate I and the support plate II, and can realize the vertical installation and fastening of the fixing screws of the support plate I and the support plate II.

[0048] The support adapter plate I is shorter than the support adapter plate II, and the two support adapter plates I and the support adapter plate II are fixed on the upper left and right welded side plates, and the opening formed after the installation of the two support adapter plates I of the upper layer is larger than that of the two support adapter plates II of the lower layer, and the width of the corresponding support plate II is smaller than that of the support plate I of the upper layer, so that the support plate II can be installed on the support adapter plate II through the gap formed by the two support adapter plates I, and the support plate I of the uppermost layer can also be easily installed on the support adapter plate I. In the embodiment of the present application, the support adapter plate I and the support adapter plate II are both embedded in the grooves on the left and right welded side plates, and are fixed in the grooves by horizontal screws, so that the support adapter plate I and the support adapter plate II can bear greater force in the upward and downward directions, and avoid that the screws for installing the support adapter plate I and the support adapter plate II bear shear force.

[0049] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, and any simple modification, equivalent change and modification of the above embodiment based on the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A watertight optical end-point, characterized by: The application relates to a watertight box body and a watertight cover plate fixed on the top of the watertight box body, wherein the watertight box body comprises a photoelectric conversion plate I fixing layer, a photoelectric conversion plate II fixing layer, a power module for supplying power to the photoelectric conversion plate I and the photoelectric conversion plate II, a switching module for switching and distributing power signals in the watertight optical terminal, and a wavelength division multiplexer fixing layer for combining the multi-channel optical signals converted by the photoelectric conversion plates into one channel optical signal; a watertight panel connector is fixed on the wall of one side of the watertight box body and is connected with the above-mentioned layers; the watertight box body is welded by a front welding panel, a rear welding panel, a left welding side plate, a right welding side plate, a lower welding bottom plate and an upper welding plate, and the inner side of each welding surface is provided with a stop surface for preventing welding marks from entering the box body; the lower welding bottom plate is integrally formed with a surrounding frame, the inner side of the upper end surface of the surrounding frame is provided with a stop surface, the inner side of the surface, where the bottom of the front welding panel, the rear welding panel, the left welding side plate and the right welding side plate is welded with the surrounding frame, is provided with a groove matched with the stop surface; the upper welding plate is in a frame structure, the inner side of the lower end surface of the upper welding plate is provided with a stop surface, and the upper end surface of the upper welding plate is provided with a rectangular groove for mounting an O-shaped ring for realizing the sealing between the upper welding plate and the watertight cover plate.

2. The water-tight optical terminal according to claim 1, characterized by: The photoelectric conversion plate I has three blocks and converts three 1000M Ethernet signals into three optical signals; the photoelectric conversion plate II converts five PAL videos, six RS485 signals, two encoder signals and three passive switch signals into one optical signal; The four converted optical signals are combined into one optical signal by the wavelength division multiplexer and are transmitted by a single-core optical fiber.

3. The watertight optical terminal according to claim 1, characterized in that: The watertight box body is provided with two supporting plates for layering the internal space, the components on the upper two layers are mounted on the corresponding supporting plates, and the supporting switching plates fixed on the side plates of the box body provide support for the supporting plates and realize the vertical installation and fastening of the fixing screws of the supporting plates.

4. The watertight optical terminal according to claim 3, characterized in that: The distance between the upper two supporting switching plates is larger than that between the lower two supporting switching plates, and the lower supporting plate can pass through the space between the upper supporting switching plates and is fixed by the lower supporting switching plates.

5. The watertight optical terminal according to claim 3, characterized in that: The supporting switching plates are embedded in the grooves on the side plates of the box body and are fixed by horizontal screws.

6. The watertight optical terminal of claim 1, wherein: The watertight cover plate is provided with a ring groove matched with the upper end surface of the outer groove of the upper welding plate, and the outer side wall of the ring groove is matched with the groove of the upper end surface of the upper cover plate.

7. A method of assembling a water-tight optical termination according to any one of claims 1 to 6, characterized in that, The application comprises the following steps: 1) welding the front welding panel, the rear welding panel, the left welding side plate, the right welding side plate, the lower welding bottom plate and the upper welding plate to form a watertight box body, and performing a radiation detection after welding to ensure that there is no welding seam defect before the next process, and then performing supplementary processing and finishing; 2) after the watertight cover plate and the watertight box body formed by welding are mounted and fastened, the watertight box body is subjected to a 0.5MPa water pressure test by using a panel connector plug for plugging the panel connector mounting hole. 3) disconnect the water-tight cover plate and the water-tight box body, and install and fix the power module, the adapter module, the wavelength division multiplexer layer, the photoelectric conversion plate II layer and the photoelectric conversion plate I layer in the box body from bottom to top; 4) fix the water-tight panel connectors corresponding to the layers respectively at the corresponding positions of the side plates of the water-tight box body, and realize the connection with the corresponding layer assemblies; 5) finally, seal and fix the water-tight cover plate on the water-tight box body and perform a 0.5MPa water pressure test again, and the assembly of the water-tight optical terminal is completed when the test is qualified.

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