Test device for verifying the number of insertions of an underwater plug connector

Abstract

The application relates to a test device for verifying the plugging times of an underwater plug connector and belongs to the technical field of underwater plug connectors, in particular to a test device for verifying the plugging times of an underwater plug connector. A control terminal of the application controls a hydraulic system; a hydraulic cylinder of a plugging test device is tightly connected with an external test chamber through test chamber fastening screws; a hydraulic push rod of the hydraulic cylinder is assembled with an underwater plug connector plug; an underwater plug connector socket is oppositely arranged with the underwater plug connector plug and is assembled with the tail of an internal frame arranged in the external test chamber through a socket tail adjusting device; the hydraulic cylinder is connected with the hydraulic system, the hydraulic push rod drives the underwater plug connector plug to advance / retract, and the plugging of the underwater plug connector socket is realized. The technical scheme of the application solves the problem that the test device in the prior art cannot directly measure the service life state of the plugging electrical connection after a certain number of plugging times during the underwater plugging electrical test.

Description

Technical Field

[0001] This invention relates to a test apparatus for verifying the number of insertions and removals of underwater pluggable connectors, and more particularly to a test apparatus for verifying the number of insertions and removals of underwater pluggable connectors. Background Technology

[0002] Underwater pluggable connectors are an indispensable part of marine industry and marine military construction, used to connect cables or optical fibers underwater. They consist of a plug and a socket, allowing for direct insertion and removal underwater. Currently, research on underwater pluggable connectors is very mature abroad, with advanced designs and processes in this field.

[0003] The reliability and stability of underwater pluggable connectors under high-pressure environments are urgent problems to be solved in the development of underwater pluggable connectors in China.

[0004] Currently, the insertion and removal tests for prototypes are often based on actual sea trials. The common method is to put the prototype in the sea and, after a period of time, predict the number of insertions and removals that the underwater plug-and-play connector can complete by measuring the contact resistance between the underwater plug and socket. However, it is not possible to directly measure the lifespan of the underwater plug-and-play connector after a certain number of insertions and removals.

[0005] In view of the problems existing in the prior art, it is necessary to research and design a new test device for verifying the number of underwater plug-in and plug-out connectors, so as to overcome the problems existing in the prior art. Summary of the Invention

[0006] The existing test apparatus proposed above cannot directly measure the lifespan of the connector after a certain number of insertions and removals when performing underwater insertion and removal tests, which is a technical problem. Therefore, a test apparatus is provided to verify the number of insertions and removals of underwater connectors, which can directly measure the lifespan of the connector after a certain number of insertions and removals at a certain water depth.

[0007] The technical means employed in this invention are as follows:

[0008] A test apparatus for verifying the number of mating cycles of an underwater connector includes: a control terminal, a hydraulic system, and a mating test device;

[0009] Furthermore, the control terminal controls the hydraulic system, precisely controlling the propulsion speed, propulsion stroke, and thrust magnitude;

[0010] Furthermore, the insertion and removal test equipment includes: a hydraulic cylinder, an external test chamber, an internal frame, an underwater insertion and removal connector plug, an underwater insertion and removal connector socket, and a socket tail adjustment device;

[0011] Furthermore, the hydraulic cylinder is securely connected to the external experimental chamber via fastening screws in the experimental chamber; the hydraulic push rod of the hydraulic cylinder is equipped with an underwater plug-in connector plug.

[0012] Furthermore, the underwater pluggable connector socket and the underwater pluggable connector plug are positioned opposite each other, and are mounted on the tail of the internal frame set inside the external experimental chamber via a socket tail adjustment device; the socket tail adjustment device can achieve fine adjustment of the distance between the plug and the socket.

[0013] Furthermore, the hydraulic cylinder is connected to the hydraulic system, and the hydraulic system controls the hydraulic push rod of the hydraulic cylinder to drive the underwater plug-in connector plug forward / backward, realizing the plugging and unplugging with the underwater plug-in connector socket.

[0014] Furthermore, the overall pressure-bearing capacity of the external test chamber must meet the pressure-bearing capacity requirements at a water depth of 1000 meters, including the test chamber walls and flange blind plates;

[0015] Furthermore, a drain valve is installed at the bottom of the test chamber wall to release pressure and water from the chamber after the insertion and removal test;

[0016] Furthermore, a safety valve is installed on the flange blind plate to ensure safety under the design pressure inside the chamber, and the pressure inside the test chamber is displayed by a pressure gauge;

[0017] Furthermore, the flange blind plate is equipped with pressure testing holes so that it can be pressure tested using a manual pressure testing device.

[0018] Furthermore, the hydraulic cylinder includes: a cylinder body, a large flange of the cylinder body, and a small flange;

[0019] Furthermore, the oil inlet and outlet ports on the cylinder block are connected to the reversing valve via pipelines;

[0020] Furthermore, a large cylinder flange is provided at the front end of the cylinder body, which is fixedly connected to the external experimental chamber; an experimental chamber sealing ring is provided between the large cylinder flange and the external experimental chamber.

[0021] Furthermore, a small flange is fixedly mounted on the front end of the hydraulic push rod of the cylinder via a thread. The small flange is fixedly mounted to the plug of the underwater plug-in connector, thereby enabling the underwater plug-in connector plug to move forward / backward.

[0022] Furthermore, a plug fixing flange is provided between the small flange and the underwater pluggable connector plug;

[0023] Furthermore, the plug fixing flange is fitted together with the guide shaft on the internal frame via a linear bearing, enabling the underwater plug-in connector plug to be guided forward / backward.

[0024] Furthermore, the small flange is designed according to the shape of the end cap of different types of underwater plug-in connectors for fixation.

[0025] Furthermore, the socket end adjustment device includes: an adjusting end threaded cylinder, an adjusting middle threaded screw, and an adjusting front fastening flange;

[0026] Furthermore, the tail end threaded sleeve is fixedly installed inside the tail end of the internal frame;

[0027] Furthermore, the adjusting middle threaded screw and the adjusting tail threaded cylinder are assembled together by threads;

[0028] Furthermore, the front end of the adjusting threaded screw is fitted with an adjusting front end fastening flange;

[0029] Furthermore, the underwater plug-in connector socket is assembled by adjusting the front fastening flange and fastening screws of the socket flange.

[0030] Furthermore, a socket fixing flange is installed between the front fastening flange and the underwater plug-in connector socket;

[0031] Furthermore, the socket fixing flange is fitted together with the guide shaft on the internal frame via a linear bearing, enabling the underwater plug-in connector plug to be guided forward / backward.

[0032] Furthermore, an underwater camera is mounted on the internal frame;

[0033] Furthermore, the underwater camera is connected to the internal frame via a universal adjustment device, which allows the angle of the underwater camera to be adjusted arbitrarily.

[0034] Furthermore, the underwater camera is connected to the underwater camera plug installed on the flange blind plate;

[0035] Furthermore, the underwater camera is equipped with an underwater light that rotates with the camera to provide illumination.

[0036] Furthermore, the universal adjustment device includes: a U-shaped adjustment component, a tail-end adjustment screw, and a universal adjustment screw;

[0037] Furthermore, the tail end of the adjusting screw is screwed into the screw hole at the bottom of the socket fixing flange, and the front end is threadedly connected to the screw hole on the U-shaped adjusting piece.

[0038] Furthermore, the U-shaped adjustment component is connected to the underwater camera via a universal adjustment screw.

[0039] Furthermore, the hydraulic system includes: an electric motor, a relief valve, a speed control valve, and a directional valve connected in sequence via pipelines;

[0040] Furthermore, the motor is connected to the control terminal;

[0041] Furthermore, the electric motor and the reversing valve are connected to the oil reservoir via pipelines;

[0042] Furthermore, the directional valve is connected to the hydraulic cylinder to realize the directional switching of the hydraulic cylinder;

[0043] Furthermore, the speed control valve regulates the propulsion speed of the hydraulic cylinder;

[0044] Furthermore, the relief valve adjusts the thrust of the hydraulic cylinder.

[0045] Furthermore, the hydraulic rod drives the underwater plug-in connector plug to move forward / backward in the horizontal direction.

[0046] Compared with the prior art, the present invention has the following advantages:

[0047] 1. The test device for verifying the number of insertions and removals of underwater plug-in connectors provided by the present invention uses a control terminal to control the propulsion speed of the hydraulic system to simulate the results of various insertion and removal speed tests of the underwater plug-in connector plug and socket; and controls the propulsion stroke of the hydraulic system to simulate the results of various insertion stroke tests of the underwater plug-in connector plug and socket.

[0048] 2. The test device for verifying the number of insertions and removals of underwater pluggable connectors provided by the present invention can fully guarantee the sealing of the insertion and removal test equipment by providing a large flange at the front end of the hydraulic cylinder body for sealing and fixing with the external test chamber; by fixing the small flange at the front end of the hydraulic push rod to the plug end cover of the underwater pluggable connector, various underwater pluggable connector tests can be realized; the movement of the underwater pluggable connector plug is realized by the advancement of the hydraulic push rod.

[0049] 3. The test device for verifying the number of underwater plug-in and plug-out connectors provided by the present invention can achieve accurate plug-in and socket insertion by providing a guide shaft on the internal frame and an adjustment device at the end of the socket; the plug-in and plug-out process inside the test device can be monitored in real time by providing an underwater sensor and an underwater light on the internal frame.

[0050] In summary, the technical solution of this invention solves the problem of plug-and-socket testing for different types of underwater pluggable connectors in the prior art. Through the coordination of the control terminal and the hydraulic system, it can model the test results of plugs and sockets at different plug-and-socket speeds and with different insertion distances. The design of the plug-and-socket testing equipment can simulate the test results of plug-and-socket mating at different water depths. This invention of the testing device allows for thorough testing of underwater pluggable connector prototypes, providing testing assurance for deep-sea underwater pluggable connectors in China. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a structural diagram of the insertion and removal test equipment of the present invention;

[0053] Figure 2 This is a top view of the present invention;

[0054] Figure 3 This is a structural diagram of the hydraulic cylinder of the present invention;

[0055] Figure 4 This is a diagram of the internal framework structure of the present invention;

[0056] Figure 5 This is a cross-sectional view of the internal frame of the present invention;

[0057] Figure 6 This is a diagram of the adjustment structure at the end of the socket of the present invention;

[0058] Figure 7 This is a cross-sectional view of the adjusting structure at the end of the socket of the present invention;

[0059] Figure 8 This is a diagram of the universal joint structure at the tail end of the underwater camera of the present invention;

[0060] Figure 9 This is a structural diagram of the external experimental chamber of the present invention;

[0061] Figure 10 This is a schematic diagram of the hydraulic system of the present invention.

[0062] In the diagram: 1. Control terminal; 2. Hydraulic system; 3. Insertion and removal test equipment; 4. Reversing valve; 5. Relief valve; 6. Speed ​​control valve; 7. Electric motor; 8. Oil reservoir; 9. Hydraulic cylinder; 10. Oil inlet; 11. Oil outlet; 12. Large flange of hydraulic cylinder body; 13. Hydraulic push rod; 14. Small flange; 15. External test chamber; 16. Test chamber wall; 17. Test chamber sealing ring; 18. Test chamber fastening screws; 19. Flange blind plate; 20. Safety valve; 21. Drain valve; 22. Pressure testing hole; 23. Internal frame; 24. Water. 25. Bottom plug connector plug, 26. Underwater plug connector socket, 27. Plug fixing flange, 28. Socket fixing flange, 29. Guide shaft, 30. Linear bearing, 31. Underwater camera, 32. Universal adjustment device, 33. U-shaped adjustment component, 34. Tail end adjustment screw, 35. Universal fastening screw, 36. Socket tail end adjustment device, 37. Underwater camera underwater plug, 38. Adjusting tail end threaded hole, 39. Adjusting middle threaded screw, 40. Adjusting front end fastening flange, 40. Socket flange fastening screw. Detailed Implementation

[0063] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0064] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0065] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0066] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0067] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0068] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0069] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0070] As shown in the figure, the present invention provides a test device for verifying the number of insertions and removals of an underwater pluggable connector, comprising: a control terminal 1, a hydraulic system 2, and a pluggable test device 3; the control terminal 1 controls the hydraulic system 2, precisely controlling the propulsion speed, propulsion stroke, and thrust magnitude; the pluggable test device 3 comprises: a hydraulic cylinder 9, an external test chamber 15, an internal frame 23, an underwater pluggable connector plug 24, an underwater pluggable connector socket 25, and a socket end adjustment device 35; the hydraulic cylinder 9 is securely connected to the external test chamber 15 via test chamber fastening screws 18. The hydraulic cylinder 9 has a hydraulic push rod 13 equipped with an underwater plug-in connector plug 24. The underwater plug-in connector socket 25 is arranged opposite to the underwater plug-in connector plug 24 and is mounted on the tail of the internal frame 23 set in the external experimental chamber 15 through the socket tail adjustment device 35. The socket tail adjustment device 35 can realize the fine adjustment of the distance between the plug and the socket. The hydraulic cylinder 9 is connected to the hydraulic system 2, and the hydraulic system 2 controls the hydraulic push rod 13 of the hydraulic cylinder 9 to drive the underwater plug-in connector plug 24 forward / backward to realize the plugging and unplugging with the underwater plug-in connector socket 25.

[0071] The overall pressure bearing capacity of the external test chamber 15 must meet the pressure bearing capacity of a water depth of 1000 meters, including: test chamber wall 16 and flange blind plate 19; the bottom of the test chamber wall 16 is equipped with a drain valve 21, which is used to release pressure and water in the chamber after the insertion and removal test; the flange blind plate 19 is equipped with a safety valve 20 to ensure safety under the design pressure in the chamber, and the pressure in the test chamber is displayed by a pressure gauge; the flange blind plate 19 is equipped with a pressure punch hole 22 so that pressure can be applied by manual pressure punching equipment.

[0072] The hydraulic cylinder 9 includes: a cylinder body, a large flange 12 and a small flange 14; an oil inlet 10 and an oil outlet 11 on the cylinder body are connected to the directional valve 4 through pipelines; a large flange 12 is provided at the front end of the cylinder body, and is fixedly connected to the external test chamber 15 through the large flange 12; a test chamber sealing ring 17 is provided between the large flange 12 and the external test chamber 15; a small flange 14 is fixedly assembled at the front end of the hydraulic push rod 13 of the cylinder body through threads, and the small flange 14 is fixedly assembled with the underwater plug-in connector plug 24 to realize the forward / backward movement of the underwater plug-in connector plug 24.

[0073] A plug fixing flange 26 is provided between the small flange 14 and the underwater plug-in connector plug 24; the plug fixing flange 26 is fitted together with the guide shaft 28 on the inner frame 23 through the linear bearing 29 to realize the forward / backward guidance of the underwater plug-in connector plug 24.

[0074] The small flange 14 is designed to be fixed according to the shape of the end cap of different types of underwater plug-in connectors.

[0075] The socket tail adjustment device 35 includes: an adjusting tail threaded cylinder 37, an adjusting middle threaded rod 38, and an adjusting front fastening flange 39; the adjusting tail threaded cylinder 37 is fixedly installed inside the tail end of the internal frame 23; the adjusting middle threaded rod 38 and the adjusting tail threaded cylinder 37 are threaded together; the adjusting middle threaded rod 38 is fitted with the adjusting front fastening flange 39 at its front end; the adjusting front fastening flange 39 is fitted with the underwater plug-in connector socket 25 via the socket flange fastening screw 40.

[0076] A socket fixing flange 27 is installed between the front fastening flange 39 and the underwater plug-in connector socket 25; the socket fixing flange 27 is fitted together with the guide shaft 28 on the internal frame 23 through the linear bearing 29 to realize the forward / backward guidance of the underwater plug-in connector plug 24.

[0077] An underwater camera is mounted on the internal frame 23. The underwater camera 30 is connected to the internal frame 23 via a universal adjustment device 31, allowing for arbitrary adjustment of the camera's angle. The underwater camera 30 is connected to an underwater camera insert 36 mounted on the flange blind plate 19. An underwater light is mounted on the underwater camera 30, rotating with it to provide illumination. Both the underwater camera 30 and the underwater light have a water pressure resistance greater than 10 MPa. The underwater camera 30 and the underwater light are fixed to the flange blind plate 19 via a watertight insert, achieving a seal.

[0078] The universal adjustment device 31 includes: a U-shaped adjustment component 32, a tail-end adjustment screw 33, and a universal adjustment screw 34; the tail end of the tail-end adjustment screw 33 is screwed into the screw hole at the bottom of the socket fixing flange 27, and the front end is threadedly connected to the screw hole on the U-shaped adjustment component 32; the U-shaped adjustment component 32 is connected to the underwater camera 30 through the universal adjustment screw 34.

[0079] The hydraulic system includes: an electric motor 7, a relief valve 5, a speed control valve 6, and a directional valve 4 connected in sequence via pipelines; the electric motor 7 is connected to the control terminal 1; the electric motor 7 and the directional valve 4 are connected to the oil reservoir 8 via pipelines; the directional valve 4 is connected to the hydraulic cylinder 9 to realize the reversing of the hydraulic cylinder 9; the speed control valve 6 adjusts the thrust speed of the hydraulic cylinder 9; and the relief valve 5 adjusts the thrust of the hydraulic cylinder 9.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A test apparatus for verifying the number of insertions and removals of an underwater connector, characterized in that: The test apparatus includes: a control terminal (1), a hydraulic system (2), and a insertion / removal test device (3); The control terminal (1) controls the hydraulic system (2) and precisely controls the propulsion speed, propulsion stroke and thrust magnitude; The insertion and removal test equipment (3) includes: a hydraulic cylinder (9), an external test chamber (15), an internal frame (23), an underwater insertion and removal connector plug (24), an underwater insertion and removal connector socket (25), and a socket tail adjustment device (35). The hydraulic cylinder (9) is fastened to the external experimental chamber (15) by the test chamber fastening screw (18); the hydraulic push rod (13) of the hydraulic cylinder (9) is equipped with an underwater plug-in connector plug (24). The underwater plug-in connector socket (25) is arranged opposite to the underwater plug-in connector plug (24), and is mounted on the tail of the internal frame (23) set in the external experimental chamber (15) by means of the socket tail adjustment device (35); the socket tail adjustment device (35) can realize the fine adjustment of the distance between the plug and the socket. The hydraulic cylinder (9) is connected to the hydraulic system (2). The hydraulic system (2) controls the hydraulic push rod (13) of the hydraulic cylinder (9) to drive the underwater plug-in connector plug (24) forward / backward, so as to realize the plugging and unplugging with the underwater plug-in connector socket (25). The hydraulic cylinder (9) includes: a cylinder body, a cylinder body large flange (12) and a small flange (14); the oil inlet (10) and oil outlet (11) provided on the cylinder body are connected to the reversing valve (4) through pipelines; the front end of the cylinder body is provided with a cylinder body large flange (12), which is fixedly connected to the external experimental chamber (15) through the cylinder body large flange (12); a test chamber sealing ring (17) is provided between the cylinder body large flange (12) and the external experimental chamber (15); the front end of the hydraulic push rod (13) of the cylinder body is fixedly assembled with a small flange (14) through threads, and the small flange (14) is fixedly assembled with the underwater plug-in connector plug (24) to realize the forward / backward movement of the underwater plug-in connector plug (24); A plug fixing flange (26) is provided between the small flange (14) and the underwater plug-in connector plug (24); the plug fixing flange (26) is fitted together with the guide shaft (28) on the inner frame (23) through the linear bearing (29) to realize the forward / backward guidance of the underwater plug-in connector plug (24); The socket tail end adjustment device (35) includes: an adjusting tail end threaded cylinder (37), an adjusting middle threaded rod (38), and an adjusting front end fastening flange (39); the adjusting tail end threaded cylinder (37) is fixedly installed inside the tail end of the internal frame (23); the adjusting middle threaded rod (38) and the adjusting tail end threaded cylinder (37) are assembled together by threads; the adjusting middle threaded rod (38) is equipped with the adjusting front end fastening flange (39) at the front end; the adjusting front end fastening flange (39) is equipped with the underwater plug-in connector socket (25) by the socket flange fastening screw (40); The aforementioned adjustment front fastening flange (39) is fitted with a socket fixing flange (27) between the underwater plug-in connector socket (25); the socket fixing flange (27) is fitted together with the guide shaft (28) on the inner frame (23) through the linear bearing (29) to realize the forward / backward guidance of the underwater plug-in connector plug (24).

2. The test apparatus for verifying the number of insertions and removals of an underwater connector according to claim 1, characterized in that: The overall pressure bearing capacity of the external test chamber (15) must meet the pressure bearing capacity of a water depth of 1000 meters, including: the test chamber wall (16) and the flange blind plate (19). The bottom of the test chamber wall (16) is equipped with a drain valve (21) for depressurizing and releasing water after the insertion and removal test. The flange blind plate (19) is equipped with a safety valve (20) to ensure safety under the design pressure inside the chamber, and the pressure inside the test chamber is displayed by a pressure gauge; The flange blind plate (19) is equipped with a pressure hole (22) so that it can be pressured by a manual pressure testing device.

3. The test apparatus for verifying the number of insertions and removals of an underwater connector according to claim 1, characterized in that: The small flange (14) is designed according to the shape of the end cap of different types of underwater plug-in connectors for fixing.

4. The test apparatus for verifying the number of insertions and removals of an underwater connector according to claim 1, characterized in that: An underwater camera (30) is mounted on the internal frame (23); The underwater camera (30) is connected to the internal frame (23) via a universal adjustment device (31), and the angle of the underwater camera (30) can be adjusted arbitrarily via the universal adjustment device (31). The underwater camera (30) is connected to the underwater camera underwater plug (36) disposed on the flange blind plate (19); The underwater camera (30) is equipped with an underwater light that rotates with the underwater camera (30) to provide illumination for the underwater camera (30); The underwater camera (30) and underwater lighting have a water pressure resistance greater than 10 MPa. The underwater camera (30) and underwater lighting are fixed to the flange blind plate (19) by watertight plugs to achieve the purpose of sealing.

5. The test apparatus for verifying the number of insertions and removals of an underwater connector according to claim 4, characterized in that: The universal adjustment device (31) includes: a U-shaped adjustment component (32), a tail end adjustment screw (33), and a universal adjustment screw (34). The tail end of the tail end adjusting screw (33) is screwed into the screw hole at the bottom of the socket fixing flange (27), and the front end is threadedly connected to the screw hole on the U-shaped adjusting piece (32). The U-shaped adjusting component (32) is connected to the underwater camera (30) via a universal adjusting screw (34).

6. The test apparatus for verifying the number of insertions and removals of an underwater connector according to claim 1, characterized in that: The hydraulic system includes: an electric motor (7), a relief valve (5), a speed control valve (6), and a directional valve (4) connected in sequence via pipelines; The electric motor (7) is connected to the control terminal (1); The electric motor (7) and the reversing valve (4) are connected to the oil tank (8) through pipelines; The reversing valve (4) is connected to the hydraulic cylinder (9) to realize the reversing of the hydraulic cylinder (9); The speed control valve (6) regulates the propulsion speed of the hydraulic cylinder (9); The overflow valve (5) adjusts the thrust of the hydraulic cylinder (9).

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