Test method of underwater optical connector plugging test device

Abstract

The invention discloses a testing method of an underwater optical connector plugging testing device, which comprises the following steps of: injecting turbid seawater, pressurizing, adjusting the temperature of the turbid seawater, detecting the minimum plugging pressure of horizontal forward rotation, detecting the minimum plugging pressure of horizontal reverse rotation, detecting the minimum plugging pressure of forward inclination and forward rotation, and detecting the minimum plugging pressure of forward inclination and reverse rotation. And detecting the minimum plugging pressure of the reverse tilt forward rotation, and detecting the minimum plugging pressure of the reverse tilt reverse rotation. The invention relates to a test method of an underwater optical connector plugging test device, which can simulate a complex underwater environment and perform cable connection test.

Description

Technical Field

[0001] The invention relates to the field of cable connection testing, in particular to a testing method for an underwater optical connector plug-in and pull-out testing device. Background Art

[0002] At present, pressure chambers have been widely used in simulating deep water pressure environments, but conventional pressure chambers can only simulate a single water pressure condition and cannot meet the multi-condition and multi-factor simulation requirements of complex underwater working conditions. This limitation is particularly evident when simulating the operating conditions of underwater wet plug-in optical connectors. The plug-in and pull-out operations of underwater wet plug-in optical connectors are completed in a complex marine environment. They are not only affected by deep water pressure and seawater salinity, but also may stir up seabed mud during operation, causing the surrounding environment to become turbid. The influence of ocean currents and the docking angle will affect the plug-in quality of the connector. These are simulation elements lacking in existing simulation test devices. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a testing method for an underwater optical connector plug-in and pull-out testing device which can simulate a complex underwater environment and perform a cable connection test.

[0004] The technical solution adopted by the present invention to solve the above problem is a testing method of an underwater optical connector plug-in and pull-out testing device, and the steps are as follows:

[0005] S1: Adjust the test chamber to a horizontal state, open the overflow valve, and inject turbid seawater from the water inlet valve until the turbid seawater overflows from the overflow valve, and then close the water inlet valve;

[0006] S2: According to the pressure at the laying depth of the submarine cable, pressurize from the overflow valve until the pressure condition is met;

[0007] S3: According to the temperature environment of submarine cable laying, the heating component is adjusted to adjust the temperature of turbid seawater until the temperature conditions are met;

[0008] S4: Adjust the plugging pressure of the first hydraulic cylinder, the stirring propeller rotates forward, and drives the water flow along the axial direction from the underwater plug to the underwater socket;

[0009] S5: Detect the effective horizontal forward minimum plugging pressure through the insertion loss tester;

[0010] S6: adjusting the plugging pressure of the first hydraulic cylinder, the stirring propeller reverses, and drives the water flow along the axial direction from the underwater socket to the underwater plug;

[0011] S7: Detect the effective horizontal reversal minimum plugging pressure through the insertion loss tester;

[0012] S8: By adjusting the components, the test cavity is set to be inclined so that the underwater plug is higher than the underwater socket;

[0013] S9: Adjust the plugging pressure of the first hydraulic cylinder, the stirring propeller rotates forward, and drives the water flow along the axial direction from the underwater plug to the underwater socket;

[0014] S10: Detect the effective positive tilt and positive rotation minimum plugging pressure through the insertion loss tester;

[0015] S11: adjusting the plugging pressure of the first hydraulic cylinder, causing the stirring propeller to reverse, and driving the water flow along the axial direction from the underwater socket to the underwater plug;

[0016] S12: Detect the effective positive tilt reversal minimum plugging pressure through the insertion loss tester;

[0017] S13: by adjusting the assembly, the test cavity is set to be tilted so that the underwater plug is lower than the underwater socket;

[0018] S14: adjusting the plugging pressure of the first hydraulic cylinder, the stirring propeller rotates forward, and drives the water flow along the axial direction from the underwater plug to the underwater socket;

[0019] S15: Detect the effective reverse tilt forward minimum plugging pressure through the insertion loss tester;

[0020] S16: adjusting the plugging pressure of the first hydraulic cylinder, causing the stirring propeller to reverse, and driving the water flow along the axial direction from the underwater socket to the underwater plug;

[0021] S17: The effective anti-tilt reversal minimum insertion pressure is detected by the insertion loss tester.

[0022] Compared with the prior art, the advantages of the present invention are as follows: the underwater working environment of seawater is simulated by filling the test cavity with turbid seawater, the seawater pressure in the test cavity is controlled by the overflow valve to simulate the underwater working environment at different depths, the seawater temperature in the test cavity is controlled by the heating component to simulate the underwater working environment at different temperatures, such as the seawater temperature at different depths and the seawater temperature at different latitudes, and the underwater working environment with underwater seawater disturbance, ocean currents and silt rolling can be simulated by stirring the stirring component, and the insertion-return loss tester is designed to detect the optical fiber loss during the plugging and unplugging process of the underwater plug and the underwater socket in the simulated marine environment, and to judge whether the plugging and unplugging process of the optical connector is Whether it is effective or damaged, by adjusting the design of the components, it is possible to simulate the underwater terrain environment and simulate different docking inclination conditions, so as to detect test data that is closer to the actual application conditions and make the data more accurate. This test method can be used to assemble the test device only once to complete the detection of various parameter data, especially in the laying process of submarine cables. When the submarine cables are laid on various terrains and at the same depth and temperature, docking data with different ocean currents and different inclinations can be obtained, which is equivalent to testing the laying environment of the entire submarine cable to determine the minimum plugging pressure under different environments, and then when using underwater robots for plugging, the effectiveness of the plugging can be better guaranteed.

[0023] As an improvement of the present invention, the stirring assembly also includes a moving chamber, a flow channel is provided between the moving chamber and the test chamber, the moving chamber is connected to the test chamber along the axis of the test chamber, and the moving chamber is provided with two operating points. At one operating point, the stirring propeller rotates forward, driving the water flow along the axial direction from the underwater plug to the underwater socket; at the other operating point, the stirring propeller reverses, driving the water flow along the flow channel from the connecting rod through-cabin end cover to the optical fiber through-cabin end cover, and then along the axial direction from the underwater socket to the underwater plug. Through the improvement, two different flowing water flows are formed through the moving design of the moving chamber combined with the forward and reverse adjustment of the stirring propeller. The two flowing water flows are respectively facing the plug-in direction of the underwater plug and the plug-in direction of the underwater socket. They are the two water flow directions that are most likely to cause plug-in failure of the underwater plug and the underwater socket. The extreme working environment of the underwater plug and the underwater socket can be tested to ensure the accuracy of the test data.

[0024] As an improvement of the present invention, the present invention further includes step A1: adjusting the components so that the test cavity is arranged horizontally;

[0025] A2: Adjust the plug-in pressure of the first hydraulic cylinder, and the stirring propeller will reverse, driving the water flow along the axial direction from the underwater socket to the underwater plug;

[0026] A3: The effective horizontal reversal maximum plugging pressure is detected by the insertion loss tester;

[0027] A4: Adjust the plug-in pressure of the first hydraulic cylinder, the stirring propeller rotates forward, and drives the water flow along the axial direction from the underwater plug to the underwater socket;

[0028] A5: The effective horizontal forward maximum plugging pressure is detected by the insertion loss tester. Through the improvement, the maximum plugging pressure of the underwater plug and the underwater socket in the horizontal state can be detected, which can avoid the plugging damage of the underwater plug and the underwater socket during the actual plugging process.

[0029] As an improvement of the present invention, the present invention further includes step B1: by adjusting the assembly, the test cavity is arranged to be tilted so that the underwater plug is higher than the underwater socket;

[0030] B2: Adjust the plug-in pressure of the first hydraulic cylinder, the stirring propeller reverses, and drives the water flow along the axial direction from the underwater socket to the underwater plug;

[0031] B3: The effective positive tilt reversal maximum plugging pressure is detected by the insertion loss tester;

[0032] B4: Adjust the plug-in pressure of the first hydraulic cylinder, the stirring propeller rotates forward, and drives the water flow along the axial direction from the underwater plug to the underwater socket;

[0033] B5: The effective maximum plugging pressure of positive tilt and positive rotation is detected by the insertion-return loss tester. Through the improvement, the maximum plugging pressure in the state where the underwater plug is higher than the underwater socket can be detected, which can avoid the plugging damage between the underwater plug and the underwater socket during the actual plugging process.

[0034] As an improvement of the present invention, the present invention further includes step C1: by adjusting the assembly, the test cavity is arranged to be tilted so that the underwater plug is lower than the underwater socket;

[0035] C2: Adjust the plug-in pressure of the first hydraulic cylinder, the stirring propeller reverses, and drives the water flow along the axial direction from the underwater socket to the underwater plug;

[0036] C3: The effective anti-tilt reversal maximum plugging pressure is detected by the insertion loss tester;

[0037] C4: Adjust the plug-in pressure of the first hydraulic cylinder, the stirring propeller rotates forward, and drives the water flow along the axial direction from the underwater plug to the underwater socket;

[0038] C5: The effective reverse tilt forward rotation maximum plugging pressure is detected by the insertion return loss tester. Through the improvement, the maximum plugging pressure when the underwater plug is lower than the underwater socket can be detected, which can avoid the plugging damage between the underwater plug and the underwater socket during the actual plugging process.

[0039] As an improvement of the present invention, in steps A1-A5, B1-B5, and C1-C5, the specified pressure is first adjusted, and then steps A1-A5, B1-B5, and C1-C5 are performed in sequence, and then the pressure is increased until the maximum plugging pressure of horizontal reversal, the maximum plugging pressure of horizontal forward rotation, the maximum plugging pressure of positive tilt reversal, the maximum plugging pressure of positive tilt forward rotation, the maximum plugging pressure of reverse tilt reversal, and the maximum plugging pressure of reverse tilt forward rotation are measured in sequence. Through the improvement, multiple maximum plugging pressure parameters can be directly tested by assembling a test device once. During the test, whenever When the optical fiber loss during a plugging process is about to reach the maximum loss data, the plugging pressure can be directly determined as the maximum plugging pressure under this condition, and then there is no need to perform the plugging test under this condition. When adjusting the plugging pressure, other test data can be tested. In this way, before the underwater plug or underwater socket is seriously damaged during the plugging process, plugging pressure tests under other conditions can be performed until all plugging pressure conditions are tested. Finally, multiple maximum plugging pressure parameters can be directly tested by assembling the test device only once, which greatly improves the test efficiency.

[0040] As an improvement of the present invention, before steps S4, S8, S13, A1, B1, and C1, a step of draining mud and sand is also included. By adjusting the component, the test chamber is tilted so that the underwater plug is lower than the underwater socket, and the stirring propeller is reversed to drive the water flow along the axial direction from the underwater socket to the underwater plug, and maintain it for 3-5 minutes. Through the improvement, in each test process, mud and sand are likely to accumulate in the underwater socket during the plugging process, so that the internal mud and sand can be discharged through the downward setting of the socket of the underwater socket and with the help of the water flow to reduce the test error. However, after each mud and sand discharge operation, it is necessary to restore the setting of the test tilt angle to ensure the test accuracy. For example, when performing the positive tilt and positive rotation minimum plugging pressure test of S12, a mud and sand discharge operation is performed, then it is necessary to perform step S8 once, and then perform steps S11 and S12. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the main internal structure of the overall test chamber of the present invention.

[0042] Figure 2 It is a schematic diagram of the top view of the structure inside the overall test chamber of the present invention when the movable chamber is at an operating point.

[0043] Figure 3 It is a schematic diagram of the top view of the structure inside the overall test chamber of the present invention when the movable chamber is at another operating point.

[0044] Figure 4 It is a schematic diagram of the optical fiber through-cabin end cover connection structure of the present invention.

[0045] Figure 5 It is a schematic diagram of the connection structure and water flow direction of the connecting rod through the cabin end cover when the moving cavity is at an operating point.

[0046] Figure 6 It is a schematic diagram of the connection structure and water flow direction of the connecting rod penetrating the cabin end cover when the moving cavity is at another operating point.

[0047] Figure 7 It is a schematic diagram of the main view of the connection structure of the connecting rod penetrating the cabin end cover of the present invention.

[0048] Figure 8 It is a schematic diagram of the structure of the heat exchange tube wrapping test chamber of the present invention.

[0049] As shown in the figure: 1. Test chamber, 2. Underwater socket, 3. Underwater plug, 4. Pressure control assembly, 4.1. Water inlet valve, 4.2. Overflow valve, 4.3. Hydraulic gauge, 5. Heating assembly, 5.1. Thermocouple, 5.2. Temperature display, 5.3. Heat exchanger, 5.3.1. Heat exchange tube, 6. Insertion loss tester, 6.1. Ribbon optical fiber, 7. Stirring assembly, 7.1. Stirring propeller, 7.2. Driving motor, 7.3. Moving chamber, 7.3.1. Flow channel, 7.4. Rotating connecting rod, 8. Adjustment assembly, 8.1, fixed support rod group, 8.2, adjustment support rod group, 9, optical fiber cabin end cover, 9.1, cabin connection piece, 10, connecting rod cabin end cover, 11, sealing assembly, 11.1, dust ring, 11.2, rotating sealing ring, 11.3, one-way sealing ring, 12, moving seat, 12.1, moving plate, 12.2, first moving connecting rod, 12.2.1, limiting protrusion, 13, first hydraulic cylinder, 14, second moving connecting rod, 15, second hydraulic cylinder, 16, guide rod. DETAILED DESCRIPTION

[0050] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0051] like Figure 1 As shown, an underwater optical connector plug-in and pull-out test device comprises a test chamber 1, wherein the test chamber 1 is filled with turbid seawater, an underwater socket 2 is fixedly connected to one end of the test chamber 1 near the inside of the test chamber 1, and an underwater plug 3 is movably connected to the other end of the test chamber 1 near the inside of the test chamber 1, wherein the underwater plug 3 performs plug-in and pull-out tests with the underwater socket 2 in a turbid seawater environment, and the test chamber 1 is also provided with a pressure control component 4 for adjusting the water pressure of the turbid seawater, a heating component 5 for adjusting the temperature of the turbid seawater, an insertion and return loss tester 6 for testing the optical fiber loss during the plug-in and pull-out process, and a stirring component 7 for stirring the turbid seawater and adjusting the flow direction of the seawater, and an adjusting component 8 for adjusting the inclination angle of the test chamber 1 is provided at the lower end of the test chamber 1.

[0052] like Figure 2-6 As shown, both ends of the test chamber 1 are respectively provided with an optical fiber through-cabin end cover 9 and a connecting rod through-cabin end cover 10 for sealingly connecting the test chamber 1. The stirring assembly 7 is arranged at one end of the test chamber 1 close to the connecting rod through-cabin end cover 10. The stirring assembly 7 includes a stirring propeller 7.1 and a driving motor 7.2. The driving motor 7.2 is used to drive the stirring propeller 7.1 to rotate forward or reverse. The stirring assembly 7 also includes a moving chamber 7.3. A flow channel 7.3.1 is provided between the moving chamber 7.3 and the test chamber 1. The movable chamber 7.3 is connected to the test chamber 1 by movement along the axis of the test chamber 1. The movable chamber 7.3 is provided with two operation points. At one operation point, the stirring propeller 7.1 rotates forward, driving the water flow along the axial direction from the connecting rod through-cabin end cover 10 to the optical fiber through-cabin end cover 9. At the other operation point, the stirring propeller 7.1 reverses, driving the water flow along the flow channel 7.3.1 from the connecting rod through-cabin end cover 10 to the optical fiber through-cabin end cover 9, and then along the axial direction from the optical fiber through-cabin end cover 9 to the connecting rod through-cabin end cover 10. The two operating points are respectively located at the two ends of the stirring propeller 7.1 along the axial direction. At one operating point, the stirring propeller 7.1 is inside the moving chamber 7.3, forming a stable axial water flow, and a small amount of radially dispersed water flow can also flow along the axial direction without flowing against the flow channel 7.3.1. At the other operating point, the stirring propeller 7.1 is outside the moving chamber 7.3, and the water flow formed will flow in the direction of the flow channel 7.3.1, and it is not easy to flow back to the moving chamber 7.3, thereby better ensuring the smoothness of the water flow and not easily causing diffusion interference of the water flow.

[0053] like Figure 1-3 , Figure 8As shown, the adjustment assembly 8 includes a group of fixed support rods 8.1 and a group of adjustable support rods 8.2, the top end of the fixed support rod group 8.1 is hinged to one end of the test cavity 1, the top end of the adjustable support rod group 8.2 is hinged to the other end of the test cavity 1, and the adjustable support rod group 8.2 can adjust the support height of the other end of the test cavity 1, the fixed support rod group 8.1 is provided with two fixed support rods, and the two fixed support rods are respectively arranged on both sides of the test cavity 1, and the adjustable support rod group 8.2 is provided with two adjustable support rods, and the two adjustable support rods are respectively arranged on both sides of the test cavity 1, wherein the upper end of the fixed support rod group 8.1 is hinged to the middle part of the test cavity 1, and the upper end of the adjustable support rod group 8.2 is also hinged to the middle part of the test cavity 1, so that the freedom of control of the test angle of the test cavity 1 can be achieved. The marine environment is complex, with many uphill and downhill laying environments. The uphill and downhill slopes also affect the plugging and unplugging of underwater optical connectors. For example, the underwater socket 2 is below the plug, and its opening is tilted upward, which makes it easier for mud and sand to accumulate inside the underwater socket 2. Therefore, it is also necessary to test the influence of the slope during plugging and unplugging. By combining the plugging and unplugging slope with the direction of the water flow, a more realistic and complex marine environment can be simulated, and the test results are more accurate.

[0054] like Figure 1-6 As shown, the edge of the optical fiber penetration end cover 9 is sealed and connected to the inner wall of the test cavity 1, and the area near the center of the optical fiber penetration end cover 9 is provided with a plurality of penetration connectors 9.1 which are sealed and connected to the optical fiber penetration end cover 9, and the plurality of penetration connectors 9.1 are respectively used for connecting various static connection lines to the inside of the test cavity 1 and the outside of the test cavity 1, and the side of the optical fiber penetration end cover 9 close to the inside of the test cavity 1 is a smooth concave surface, and the edge of the connecting rod penetration end cover 10 is sealed and connected to the inner wall of the test cavity 1, and the area near the center of the connecting rod penetration end cover 10 is provided with a plurality of sealing components 11 which are dynamically sealed and connected to the connecting rod penetration end cover 10, and the plurality of sealing components 11 are respectively used for connecting various dynamic connecting rods to the inside of the test cavity 1 and the outside of the test cavity 1, and the side of the connecting rod penetration end cover 10 close to the inside of the test cavity 1 is a smooth concave surface.

[0055] Firstly, the sealing of the two ends of the test cavity 1 is achieved through the design of the optical fiber penetration end cover 9 and the connecting rod penetration end cover 10; the penetration connector 9.1 is designed to ensure the sealing of the optical fiber penetration end cover, so as to avoid the detection equipment at this end from being placed in the test cavity 1 as a whole, so as to reduce the volume of the test cavity 1, and can reduce the contact range of the detection equipment with turbid seawater, avoid the detection equipment from being corroded by seawater, and extend the service life of the detection equipment; the sealing component 11 is designed to ensure the sealing of the connecting rod penetration end cover 10, so as to avoid the driving equipment at this end from being placed in the test cavity as a whole, so as to reduce the volume of the test cavity 1, and can reduce the contact range of the driving equipment with turbid seawater, avoid the driving equipment from being corroded by seawater, and extend the service life of the driving equipment; and the smooth concave surface design of the optical fiber penetration end cover 9 and the connecting rod penetration end cover 10 can make the water flow in the test cavity 1 smoother and reduce the formation of eddy currents.

[0056] The heating assembly 5 includes a thermocouple 5.1 and a temperature display 5.2. The thermocouple 5.1 is arranged inside the test chamber 1 to detect the temperature of the turbid seawater. The temperature display 5.2 is arranged outside the test chamber 1 to observe the temperature of the turbid seawater. The thermocouple 5.1 and the temperature display 5.2 are connected by an electrical connection line passing through the through-tank connector 9.1 to monitor the temperature of the turbid seawater. Meanwhile, the temperature display 5.2 is arranged outside the test chamber 1 to avoid the problem of the temperature display 5.2 being corroded by seawater.

[0057] The insertion loss tester 6 is connected to two ribbon optical fibers 6.1, and the insertion loss tester 6 is arranged outside the test cavity 1. The two ribbon optical fibers 6.1 pass through a through-cabin connector 9.1 and are respectively connected to the underwater plug 3 and the underwater socket 2. The connection between the insertion loss tester 6 and the underwater plug 3 and the underwater socket 2 is realized, so that the optical fiber loss of the underwater plug 3 and the underwater socket 2 during the plugging and unplugging process can be measured. At the same time, the insertion loss tester 6 is arranged outside the test cavity, which avoids the problem of the insertion loss tester being corroded by seawater.

[0058] The stirring propeller 7.1 is arranged inside the test chamber 1, and the driving motor 7.2 is arranged outside the test chamber 1. The stirring propeller 7.1 and the driving motor 7.2 are driven and connected by a rotating connecting rod 7.4. The rotating connecting rod 7.4 is rotationally sealed connected to the connecting rod through-cabin end cover 10. The sealing assembly 11 between the rotating connecting rod 7.4 and the connecting rod through-cabin end cover 10 includes a dust ring 11.1 and two rotating sealing rings 11.2. The stirring assembly 7 stirs the turbid seawater. The driving motor 7.2 is arranged outside the test chamber 1 to reduce the volume of the test chamber 1 and the contact range between the driving motor 7.2 and the turbid seawater, thereby preventing the driving motor 7.2 from being corroded by seawater and extending the service life of the driving motor 7.2. The design of the dust ring 11.1 can prevent the mud and sand in the test chamber 1 from penetrating into the rotating connecting rod 7.4 and the connecting rod through-tank end cover 10. The design of the two rotating sealing rings 11.2 can prevent the seawater from seeping out from between the rotating connecting rod 7.4 and the connecting rod through-tank end cover 10 during the rotation of the rotating connecting rod 7.4.

[0059] like Figure 1-7 As shown, the underwater plug 3 is fixedly connected to a moving seat 12, and the moving seat 12 includes two moving plates 12.1 and two first moving connecting rods 12.2. The two moving plates 12.1 are respectively arranged inside the test chamber 1 and outside the test chamber 1. The two first moving connecting rods 12.2 are movably sealed and connected to the connecting rod through-cabin end cover 10. The moving plate 12.1 arranged inside the test chamber 1 is fixedly connected to the underwater plug 3, and the moving plate 12.1 arranged outside the test chamber 1 is fixedly connected to the moving end of the first hydraulic cylinder 13. The moving chamber 7.3 is close to the connecting rod through-cabin end cover 10. Two second movable connecting rods 14 are fixedly connected to the end, and the two second movable connecting rods 14 are driven and connected to the second hydraulic cylinder 15. The end of the movable cavity 7.3 close to the optical fiber through-cabin end cover 9 is movably connected to four guide rods 16, and the four guide rods 16 are fixedly connected to the optical fiber through-cabin end cover 9. The sealing assembly 11 used for moving and sealingly connecting the connecting rod through-cabin end cover 10 and the first movable connecting rod 12.2 and the sealing assembly 11 used for moving and sealingly connecting the connecting rod through-cabin end cover 10 and the second movable connecting rod 14 have the same structure, and both include a dust ring 11.1 and a one-way sealing ring 11.3 set in the same direction. The two first movable connecting rods 12.2 are symmetrically arranged about the rotating connecting rod 7.4, and the two second movable connecting rods 14 are also symmetrically arranged about the rotating connecting rod 7.4. The distance between the first movable connecting rod 12.2 and the rotating connecting rod 7.4 is smaller than the distance between the second movable connecting rod 14 and the rotating connecting rod 7.4, so that the first movable connecting rod 12.2 and the second movable connecting rod 14 are misaligned and the structural stability of the connecting rod through-cabin end cover 10 is maintained.

[0060] The driving connection between the underwater plug 3 and the first hydraulic cylinder 13 is realized, and the stability of the driving connection between the first hydraulic cylinder 13 and the underwater plug 3 is ensured by the design of multiple first movable connecting rods 12.2. The first hydraulic cylinder 13 is arranged outside the test chamber 1, which can reduce the volume of the test chamber 1 and reduce the contact between the first hydraulic cylinder 13 and turbid seawater, thereby preventing the first hydraulic cylinder 13 from being corroded by seawater, so as to extend the service life of the first hydraulic cylinder 13; similarly, the driving connection between the mobile chamber 7.3 and the second hydraulic cylinder 15 is realized, and the stability of the driving connection between the second hydraulic cylinder 15 and the mobile chamber 7.3 is ensured by the design of multiple second movable connecting rods 14. The second hydraulic cylinder 15 is arranged outside the test chamber 1, which can reduce the volume of the test chamber 1 and reduce the second hydraulic cylinder 15. The contact between the hydraulic cylinder 15 and the turbid seawater prevents the second hydraulic cylinder 15 from being corroded by seawater, so as to extend the service life of the second hydraulic cylinder 15, wherein the design of the guide rod 16 ensures the stability of the movement of the movable chamber 7.3; in the sealing assembly 11, the design of the dust ring 11.1 can prevent the mud and sand in the test chamber 1 from penetrating into the first movable connecting rod 12.2, the second movable connecting rod 14 and the connecting rod through-tank end cover 10, and the design of the two one-way sealing rings 11.3 can prevent the seawater from seeping out from between the first movable connecting rod 12.2 and the connecting rod through-tank end cover 10 during the movement of the first movable connecting rod 12.2, and also prevent the seawater from seeping out from between the second movable connecting rod 14 and the connecting rod through-tank end cover 10 during the movement of the second movable connecting rod 14.

[0061] The one-way sealing ring 11.3 is composed of a step seal composed of a rubber O-ring and a polytetrafluoroethylene ring, and the rotating sealing ring 11.2 is composed of a Gly ring composed of a rubber O-ring and a polytetrafluoroethylene ring.

[0062] During use, in order to prevent the mobile plate 12.1 arranged inside the test chamber 1 from interfering with the stirring propeller 7.1 or the moving chamber 7.3 during the movement of the first moving connecting rod 12.2, so as to ensure the safety of the stirring propeller 7.1 and the moving chamber 7.3, a limiting protrusion 12.2.1 is provided on the area where the first moving connecting rod 12.2 is arranged inside the test chamber 1.

[0063] like Figure 1 , Figure 8As shown, the pressure control assembly 4 includes an inlet valve 4.1, an overflow valve 4.2 and a hydraulic gauge 4.3. The inlet valve 4.1 is arranged below the test chamber 1, and the overflow valve 4.2 is arranged above the test chamber 1. The inlet valve 4.1 and the overflow valve 4.2 are arranged at both ends of the test chamber 1, respectively, so that water is injected into the test chamber 1 from the inlet valve 4.1 until water overflows from the overflow valve 4.2, thereby ensuring the sufficiency of turbid seawater in the test chamber 1. At the same time, the inlet valve 4.1 can also be used as an outlet valve to discharge water after the test is completed, and the overflow valve 4.2 can also be used as a booster valve. The water pressure in the test chamber 1 is increased by the overflow valve 4.2, which is convenient for simulating turbid seawater at different depths, and the hydraulic gauge 4.3 is designed to accurately monitor the current hydraulic pressure of the turbid seawater; the heating component 5 also includes a heat exchanger 5.3, and the heat exchanger 5.3 includes a heat exchange tube 5.3.1, and the heat exchange tube 5.3.1 uniformly wraps the outer wall of the test chamber 1 to achieve temperature control of the turbid seawater and ensure the temperature uniformity of the turbid seawater, wherein the heat exchange tube 5.3.1 is wrapped around the hinge of the test chamber 1 and the fixed support rod group 8.1 and the adjustment support rod group 8.2. In actual applications, because the seabed temperature is low, the main function of the heating component 5 is to cool down.

[0064] Through the design of the underwater optical connector plug-in and pull-out test device, underwater operating environments at different depths, different temperatures, different ocean currents, and different terrains can be simulated, including a horizontal operating environment, an inclined operating environment in which the underwater plug 3 is lower than the underwater socket 2, and an inclined operating environment in which the underwater plug 3 is higher than the underwater socket 2. The ocean current directions include from the underwater plug 3 to the underwater socket 2 and from the underwater socket 2 to the underwater plug 3. From the operating angle and the operating ocean current direction, six groups of different types of operating environments can be formed, so that the plug-in and pull-out effects of the underwater plug 3 and the underwater socket 2 under different operating environments can be tested more accurately, which is beneficial to ensure the effectiveness of underwater plug-in and pull-out operations during actual operations.

[0065] A testing method for an underwater optical connector plug-in and pull-out testing device, the steps of which are as follows:

[0066] S1: Adjust the test chamber 1 to a horizontal state, open the overflow valve 4.2, and inject turbid seawater from the water inlet valve 4.1 until the turbid seawater overflows from the overflow valve 4.2, and then close the water inlet valve 4.1;

[0067] S2: According to the pressure at the laying depth of the submarine cable, pressurize from the overflow valve 4.2 until the pressure condition is met;

[0068] S3: According to the temperature environment of the submarine cable laying, the heating component 5 is adjusted to adjust the temperature of the turbid seawater until the temperature condition is met;

[0069] S4: Adjust the plugging pressure of the first hydraulic cylinder 13, and the stirring propeller 7.1 rotates forward, driving the water flow along the axial direction from the underwater plug 3 to the underwater socket 2;

[0070] S5: Detecting the effective horizontal forward minimum plugging pressure through the insertion loss tester 6;

[0071] S6: Adjust the plugging pressure of the first hydraulic cylinder 13, and the stirring propeller 7.1 reverses, driving the water flow along the axial direction from the underwater socket 2 to the underwater plug 3;

[0072] S7: Detecting the effective horizontal reversal minimum plugging pressure through the insertion loss tester 6;

[0073] S8: By adjusting the component 8, the test chamber 1 is set to be inclined so that the underwater plug 3 is higher than the underwater socket 2;

[0074] S9: Adjust the plugging pressure of the first hydraulic cylinder 13, and the stirring propeller 7.1 rotates forward, driving the water flow along the axial direction from the underwater plug 3 to the underwater socket 2;

[0075] S10: Detecting the effective positive tilt and positive rotation minimum plugging pressure through the insertion loss tester 6;

[0076] S11: adjusting the plugging pressure of the first hydraulic cylinder 13, the stirring propeller 7.1 reverses, and drives the water flow along the axial direction from the underwater socket 2 to the underwater plug 3;

[0077] S12: Detecting the effective positive tilt reversal minimum plugging pressure through the insertion loss tester 6;

[0078] S13: by adjusting the assembly 8, the test chamber 1 is arranged so that the underwater plug 3 is lower than the underwater socket 2;

[0079] S14: adjusting the plugging pressure of the first hydraulic cylinder 13, the stirring propeller 7.1 rotates forward, driving the water flow along the axial direction from the underwater plug 3 to the underwater socket 2;

[0080] S15: Detecting the effective reverse tilt forward minimum plugging pressure through the insertion loss tester 6;

[0081] S16: adjusting the plugging pressure of the first hydraulic cylinder 13, the stirring propeller 7.1 is reversed, and the water flow is driven to move from the underwater socket 2 to the underwater plug 3 along the axial direction;

[0082] S17: Detecting the effective anti-tilt reversal minimum insertion pressure through the insertion loss tester 6.

[0083] The method further comprises step A1: adjusting the component 8 so that the test chamber 1 is arranged horizontally;

[0084] A2: Adjust the plugging pressure of the first hydraulic cylinder 13, and the stirring propeller 7.1 will reverse, driving the water flow along the axial direction from the underwater socket 2 to the underwater plug 3;

[0085] A3: The effective horizontal reversal maximum plugging pressure is detected by the insertion loss tester 6;

[0086] A4: Adjust the plugging pressure of the first hydraulic cylinder 13, the stirring propeller 7.1 rotates forward, and drives the water flow along the axial direction from the underwater plug 3 to the underwater socket 2;

[0087] A5: The effective horizontal forward maximum plugging pressure is detected by the insertion loss tester 6.

[0088] The step B1 is also included: by adjusting the assembly 8, the test chamber 1 is arranged to be tilted so that the underwater plug 3 is higher than the underwater socket 2;

[0089] B2: Adjust the plugging pressure of the first hydraulic cylinder 13, the stirring propeller 7.1 reverses, and drives the water flow along the axial direction from the underwater socket 2 to the underwater plug 3;

[0090] B3: The effective positive tilt reversal maximum plugging pressure is detected by the insertion loss tester 6;

[0091] B4: Adjust the plugging pressure of the first hydraulic cylinder 13, the stirring propeller 7.1 rotates forward, and drives the water flow along the axial direction from the underwater plug 3 to the underwater socket 2;

[0092] B5: The effective positive tilt and positive rotation maximum plugging pressure is detected by the insertion loss tester 6.

[0093] The step C1 is also included: by adjusting the assembly 8, the test chamber 1 is arranged to be tilted so that the underwater plug 3 is lower than the underwater socket 2;

[0094] C2: Adjust the plugging pressure of the first hydraulic cylinder 13, the stirring propeller 7.1 reverses, and drives the water flow along the axial direction from the underwater socket 2 to the underwater plug 3;

[0095] C3: The effective anti-tilt reversal maximum plugging pressure is detected by the insertion loss tester 6;

[0096] C4: Adjust the plugging pressure of the first hydraulic cylinder 13, the stirring propeller 7.1 rotates forward, and drives the water flow along the axial direction from the underwater plug 3 to the underwater socket 2;

[0097] C5: The effective reverse tilt forward rotation maximum plugging pressure is detected by the insertion loss tester 6.

[0098] In steps A1-A5, B1-B5, and C1-C5, first adjust to the specified pressure, and then perform steps A1-A5, B1-B5, and C1-C5 in sequence, and then increase the pressure until the maximum plugging pressure of horizontal reversal, the maximum plugging pressure of horizontal forward rotation, the maximum plugging pressure of positive tilt reversal, the maximum plugging pressure of positive tilt forward rotation, the maximum plugging pressure of reverse tilt reversal, and the maximum plugging pressure of reverse tilt forward rotation are measured in sequence. By assembling a test device once, multiple maximum plugging pressure parameters can be directly tested. During the test, whenever the optical fiber loss in a plugging process is about to reach the maximum loss data, the plugging pressure can be directly determined as the maximum plugging pressure under this condition, and then there is no need to perform a plugging test under this condition. When adjusting the plugging pressure, other test data can be tested. In this way, before causing serious damage to the underwater plug 3 or the underwater socket 2 during the plugging process, plugging pressure tests under other conditions can be performed until all plugging pressure condition tests are completed. Finally, multiple maximum plugging pressure parameters can be directly tested by assembling the test device only once, thereby greatly improving the test efficiency.

[0099] Before steps S4, S8, S13, A1, B1, and C1, a step of discharging sediment is also included. By adjusting the component 8, the test chamber 1 is set to be tilted so that the underwater plug 3 is lower than the underwater socket 2, and the stirring propeller 7.1 is reversed to drive the water flow from the underwater socket 2 to the underwater plug 3 along the axial direction, and maintain it for 3-5 minutes. In each test process, sediment is likely to accumulate in the underwater socket 2 during the plugging process, so that the internal sediment can be discharged through the downward setting of the socket of the underwater socket 2 and with the help of the water flow to reduce the test error. However, after each operation of discharging sediment, the setting of the test tilt angle needs to be restored to ensure the accuracy of the test. For example, when performing the positive tilt and positive rotation minimum plugging pressure test of S12, a sediment discharging operation is performed, and then step S8 needs to be performed once, and then steps S11 and S12 are performed.

[0100] The above description is only for the best embodiment of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A test method for an underwater optical connector plug-in test device, characterized in that: The steps are as follows: S1: Adjust the test chamber (1) to a horizontal state, open the overflow valve (4.2), and inject turbid seawater from the water inlet valve (4.1) until the turbid seawater overflows from the overflow valve (4.2), and then close the water inlet valve (4.1); S2: According to the pressure at the laying depth of the submarine cable, pressurize from the overflow valve (4.2) until the pressure condition is met; S3: According to the temperature environment of the submarine cable laying, the heating component (5) is adjusted to adjust the temperature of the turbid seawater until the temperature condition is met; S4: adjusting the plugging pressure of the first hydraulic cylinder (13), causing the stirring propeller (7.1) to rotate forward, driving the water flow along the axial direction from the underwater plug (3) to the underwater socket (2); S5: Detecting the effective horizontal forward minimum plugging pressure through the insertion loss tester (6); S6: adjusting the plugging pressure of the first hydraulic cylinder (13), causing the stirring propeller (7.1) to reverse, thereby driving the water flow along the axial direction from the underwater socket (2) to the underwater plug (3); S7: Detecting the effective horizontal reversal minimum plugging pressure by the insertion loss tester (6); S8: by adjusting the assembly (8), the test chamber (1) is arranged to be tilted so that the underwater plug (3) is higher than the underwater socket (2); S9: adjusting the plugging pressure of the first hydraulic cylinder (13), causing the stirring propeller (7.1) to rotate forward, driving the water flow along the axial direction from the underwater plug (3) to the underwater socket (2); S10: Detecting the effective positive tilt and positive rotation minimum plugging pressure by using the insertion loss tester (6); S11: adjusting the plugging pressure of the first hydraulic cylinder (13), causing the stirring propeller (7.1) to reverse, thereby driving the water flow along the axial direction from the underwater socket (2) to the underwater plug (3); S12: Detecting the effective positive tilt reversal minimum plugging pressure by using the insertion loss tester (6); S13: by adjusting the assembly (8), the test chamber (1) is arranged to be tilted so that the underwater plug (3) is lower than the underwater socket (2); S14: adjusting the plugging pressure of the first hydraulic cylinder (13), causing the stirring propeller (7.1) to rotate forward, thereby driving the water flow along the axial direction from the underwater plug (3) to the underwater socket (2); S15: Detecting the effective reverse tilt forward rotation minimum plugging pressure by using the insertion loss tester (6); S16: adjusting the plugging pressure of the first hydraulic cylinder (13), causing the stirring propeller (7.1) to reverse, thereby driving the water flow along the axial direction from the underwater socket (2) to the underwater plug (3); S17: Detecting the effective anti-tilt reversal minimum insertion pressure through the insertion loss tester (6).

2. The test method of the underwater optical connector plug-in test device according to claim 1, characterized in that: The stirring assembly (7) further comprises a moving chamber (7.3), a flow channel (7.3.1) being provided between the moving chamber (7.3) and the test chamber (1), the moving chamber (7.3) being movably connected to the test chamber (1) along the axis of the test chamber (1), the moving chamber (7.3) being provided with two operating points in total, at one operating point, the stirring propeller (7.1) rotates forward, driving the water flow to move in the axial direction from the underwater plug (3) to the underwater socket (2), and at the other operating point, the stirring propeller (7.1) rotates reversely, driving the water flow to move in the flow channel (7.3.1) from the connecting rod through-cabin end cover (10) to the optical fiber through-cabin end cover (9), and then moving in the axial direction from the underwater socket (2) to the underwater plug (3).

3. The test method of the underwater optical connector plug-in test device according to claim 1, characterized in that: The method further comprises step A1: adjusting the component (8) so that the test chamber (1) is arranged horizontally; A2: adjusting the plugging pressure of the first hydraulic cylinder (13), the stirring propeller (7.1) is reversed, and the water flow is driven to move along the axial direction from the underwater socket (2) to the underwater plug (3); A3: Detect the effective horizontal reversal maximum plugging pressure through the insertion loss tester (6); A4: The plugging pressure of the first hydraulic cylinder (13) is adjusted, and the stirring propeller (7.1) rotates forward, driving the water flow along the axial direction from the underwater plug (3) to the underwater socket (2); A5: Use the insertion loss tester (6) to detect the effective horizontal forward maximum insertion pressure.

4. The test method of the underwater optical connector plug-in test device according to claim 3, characterized in that: The method further comprises step B1: adjusting the component (8) so that the test chamber (1) is tilted so that the underwater plug (3) is higher than the underwater socket (2); B2: adjusting the plugging pressure of the first hydraulic cylinder (13), causing the stirring propeller (7.1) to reverse, driving the water flow along the axial direction from the underwater socket (2) to the underwater plug (3); B3: Detecting the effective positive tilt reversal maximum plugging pressure through the insertion loss tester (6); B4: adjusting the plugging pressure of the first hydraulic cylinder (13), the stirring propeller (7.1) rotates forward, and drives the water flow along the axial direction from the underwater plug (3) to the underwater socket (2); B5: The effective positive tilt and positive rotation maximum plugging pressure is detected by the insertion loss tester (6).

5. The test method of the underwater optical connector plug-in test device according to claim 4, characterized in that: The method further comprises step C1: adjusting the assembly (8) so that the test chamber (1) is tilted so that the underwater plug (3) is lower than the underwater socket (2); C2: adjusting the plugging pressure of the first hydraulic cylinder (13), causing the stirring propeller (7.1) to reverse, driving the water flow along the axial direction from the underwater socket (2) to the underwater plug (3); C3: The effective anti-tilt reversal maximum plugging pressure is detected by the insertion loss tester (6); C4: adjusting the plugging pressure of the first hydraulic cylinder (13), the stirring propeller (7.1) rotates forward, and drives the water flow along the axial direction from the underwater plug (3) to the underwater socket (2); C5: The effective reverse tilt forward rotation maximum plugging pressure is detected by the insertion loss tester (6).

6. The test method of the underwater optical connector plug-in test device according to claim 5, characterized in that: In steps A1-A5, B1-B5, and C1-C5, first adjust to the specified pressure, and then perform steps A1-A5, B1-B5, and C1-C5 in sequence, and then increase the pressure until the maximum plugging pressure of horizontal reversal, the maximum plugging pressure of horizontal forward rotation, the maximum plugging pressure of positive tilt reversal, the maximum plugging pressure of positive tilt forward rotation, the maximum plugging pressure of reverse tilt reversal, and the maximum plugging pressure of reverse tilt forward rotation are measured in sequence.

7. The test method of the underwater optical connector plug-in test device according to claim 6, characterized in that: Before steps S4, S8, S13, A1, B1 and C1, the method further includes the step of draining mud and sand, wherein the test chamber (1) is tilted so that the underwater plug (3) is lower than the underwater socket (2) by adjusting the component (8), and the stirring propeller (7.1) is reversed to drive the water flow along the axial direction from the underwater socket (2) to the underwater plug (3), and the process is maintained for 3 to 5 minutes.

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