A stress state monitoring device for the observation window of a manned submersible

Abstract

A stress state monitoring device for the observation window of a manned submersible, belonging to the technical field of underwater equipment, mainly includes a sealed container, a pressure-resistant viewing glass, and a monitoring camera. Among them, the front end of the sealed container is provided with a pressure-resistant viewing glass, and a monitoring camera is installed inside the container, and a waterproof plug is arranged at the rear end of the container. The monitoring camera is connected to the sealed container through a camera support. The camera support is provided with an expansion ring, and at least part of the structure of the expansion ring is in interference fit with the sealed container. The structure of the present invention is simple and the cost is low. Through the combination of the sealed container, the pressure-resistant viewing glass and the monitoring camera, underwater real-time monitoring is realized, and corresponding protection is carried out on precision equipment; combined with the design of the expansion ring, the monitoring camera can be quickly fixed, and the structure of the device can be simplified, and the corresponding installation position design can be reduced, so as to improve its overall sealing performance and strength, suitable for working in deep-sea environments. Moreover, the expansion ring can also provide an additional support position for the sealed container, thereby increasing the overall compressive capacity.

Description

Technical Field

[0001] The present invention belongs to the technical field of underwater equipment, and particularly relates to a stress state monitoring device for the observation window of a manned submersible. Background Art

[0002] In the underwater operation of a large-depth manned submersible, the common manned submersible has an observation window design. The main purpose is to provide a more intuitive channel for the crew to observe the deep-sea environment, and it also helps to alleviate the negative psychological impact of the enclosed and narrow space on the operators.

[0003] In reality, due to the size and material problems of the observation window, it is likely to become a weak link in the overall strength of the submersible. Therefore, from a safety perspective, there is a need to continuously detect the observation window on the submersible to improve the safety of submerging navigation. Among them, what is particularly needed is the high-precision in-situ detection of the internal stress of the observation window, aiming to accurately express the physical and mechanical responses of the in-service process of the submersible observation window, such as the internal stress stratified distribution, elastic-plastic transformation, and stress aggregation and release under conditions such as temperature, load time, loading rate, and stress level, so as to avoid dangerous situations as early as possible.

[0004] Therefore, the above detection can be completed by the RGB instantaneous photoelastic measurement technology based on a color polarization camera to online monitor the stress state of the observation window. This detection method has the characteristics of light weight, follow-up automation, and high stability, and can be mounted on the external structure of the manned submersible. After the submersible enters the water, the camera can monitor the state of the observation window in real time, effectively solving the technical problems such as miniaturization, low power consumption, high anti-interference, and adaptability to narrow spaces of the deep-sea measurement instruments carried by the submersible.

[0005] However, since the surface of the observation window to be measured by the above device is on the high-pressure side (the outside of the submersible), the camera needs to be installed in the external space of the submersible. Therefore, due to the installation environment problem, there are two design schemes. One is to increase the external structure of the submersible and install a camera in it to directly monitor the observation window. Although this design idea is easy to understand and improve, this scheme will significantly increase the overall design and production cost of the submersible, and the corresponding monitoring device does not have universality and cannot be adapted to the existing submersibles. The other is to provide anti-pressure and waterproof protection for the camera used in the scheme. If the existing camera is improved, it needs to be redesigned, which will not only significantly increase the use cost, but also there are other physical damage situations due to the complex deep-sea environment and the direct external placement of the camera body.

[0006] In summary, it is still necessary to design a stress state monitoring device for the observation window of a manned submersible that can be used in the deep-sea environment. Based on the above detection technology, it can monitor the observation window in real time under low-cost conditions and has a certain degree of versatility and good maintainability. Summary of the Invention

[0007] In view of the problems existing in the prior art, the present invention provides a stress state monitoring device for the observation window of a manned submersible, and solves the above problems by optimizing the overall structural design.

[0008] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] A stress state monitoring device for the observation window of a manned submersible mainly includes a sealed container, a pressure-resistant viewing glass, and a monitoring camera;

[0010] The pressure-resistant viewing glass is provided at the front end of the sealed container, and the monitoring camera is detachably installed inside the container;

[0011] A waterproof plug is provided at the rear end of the sealed container, and the monitoring camera is connected through a cable;

[0012] The monitoring camera is connected to the sealed container through a camera bracket;

[0013] The camera bracket is provided with an expansion ring, the expansion ring contacts the inner wall of the sealed container, and at least part of the structure of the expansion ring is in interference fit with the sealed container.

[0014] Further, the camera bracket includes an expansion ring, a connecting column, and a fixing frame;

[0015] At least one connecting column is fixedly provided on one end face of the expansion ring;

[0016] The connecting column is connected to the fixing frame;

[0017] The fixing frame is connected to the body of the monitoring camera.

[0018] Further, the expansion ring is of a split structure and has an I-shaped ring structure in the spliced state;

[0019] The expansion ring includes a front ring body and a rear ring body;

[0020] The front ring body is connected to the monitoring camera through an adapter, the rear ring body is connected to the front ring body by screws, and the splicing surface between the front ring body and the rear ring body is a slope structure;

[0021] The rear ring body is in interference fit with the sealed container through a cold assembly process.

[0022] Furthermore, the sealed container is of a segmented structure, including a front end cover, a cylinder body, and a rear end cover;

[0023] The pressure-resistant sight glass is installed in the front end cover;

[0024] The male end of the waterproof plug is installed in the rear end cover, and the female end of the waterproof plug is connected to the lower computer inside the submersible through a cable.

[0025] Furthermore, the front end cover is a hollow cylindrical structure and is connected to the cylinder body by bolts;

[0026] The front end cover is provided with a reduced-diameter rear flange, the rear flange is inserted into the interior of the cylinder body, and the pressure-resistant sight glass is snap-fitted onto the rear flange.

[0027] Furthermore, an annular groove is provided on the contact surface between the rear flange and the cylinder body, and a sealing ring is installed;

[0028] An annular groove is also provided on the contact surface between the rear flange and the pressure-resistant sight glass, and a sealing ring is installed;

[0029] An O-ring is further provided between the rear flange and the pressure-resistant sight glass, and the material of the O-ring is copper.

[0030] Furthermore, an annular groove is provided on the inner side surface of the front end cover, and a sealing ring is installed.

[0031] Furthermore, an annular clamping groove is provided on the inner side surface of the front end cover, and a snap ring is installed to fix the pressure-resistant sight glass.

[0032] Furthermore, the rear end cover is provided with a reduced-diameter front boss, the front boss is inserted into the interior of the cylinder body, and an annular groove is provided on the contact surface between the front boss and the cylinder body, and a sealing ring is installed;

[0033] A side-opening U-shaped counterbore is provided on the rear end cover, and it is connected to the cylinder body by bolts.

[0034] Furthermore, the monitoring device is placed in the sampling basket of the submersible, or is detachably connected to the manipulator of the submersible, or is detachably connected to the external hanging bracket of the submersible.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The device of the present invention has a simple structure and low cost. It realizes real-time underwater monitoring through the combination of a sealed container, a pressure-resistant sight glass and a monitoring camera, and provides corresponding protection for precision equipment. Combined with the design of the expansion ring, the monitoring camera can be quickly fixed, the structure of the device can be simplified, and the corresponding installation position design can be reduced, so as to improve its overall sealing performance and strength. It is suitable for working in deep-sea environments, and the expansion ring can also provide an additional support position for its sealed container, thereby increasing the overall compressive capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0038] Figure 1 It is the front-side perspective view in the specific embodiment of the present invention;

[0039] Figure 2 It is the rear-side perspective view in the specific embodiment of the present invention;

[0040] Figure 3 It is the longitudinal sectional view in the specific embodiment of the present invention;

[0041] Figure 4 It is the internal structure schematic diagram of the device in the specific embodiment of the present invention;

[0042] Figure 5 It is the schematic diagram of the installation positions of the monitoring camera and the pressure-resistant sight glass in the specific embodiment of the present invention;

[0043] Figure 6 It is the combined perspective view of the monitoring camera and the camera bracket in the specific embodiment of the present invention;

[0044] Figure 7 It is the perspective view of the camera bracket in the specific embodiment of the present invention;

[0045] Figure 8 It is the sectional view of the expansion ring in the specific embodiment of the present invention;

[0046] Figure 9 It is the perspective view of the rear end cover in the specific embodiment of the present invention;

[0047] Figure 10 It is the sectional view of the rear end cover in the specific embodiment of the present invention;

[0048] Figure 11 It is the perspective view of the front end cover in the specific embodiment of the present invention;

[0049] Figure 12This is a cross-sectional view of the front end cover in a specific embodiment of the present invention.

[0050] In the figure: 1. Rear end cover, 2. Cylinder body, 3. Front end cover, 4. Pressure-resistant sight glass, 5. Waterproof plug, 6. Monitoring camera, 7. Camera bracket, 8. Camera cable, 101. Rear end cover body, 102. Plug mounting hole, 103. Side-opening U-shaped counterbore, 104. Front boss, 301. Front end cover body, 302. Mounting counterbore, 303. Rear flange, 304. Annular clamping groove, 305. Second inner ring groove, 306. First inner ring groove, 307. Outer ring groove, 701. Expansion ring, 702. Connecting column, 703. Fixed frame, 7011. Front ring body, 7012. Rear ring body. Specific embodiments

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0053] In the description of the present invention, it should be understood that the relative relationships indicated by terms such as "front" and "rear" are based on the relationship of the device facing the observation window when installed in the actual application. For the convenience of describing the present invention and simplifying the description, it does not indicate or imply that the device or element referred to must have a specific position. Therefore, it should not be construed as a limitation of the present invention.

[0054] In the present invention, unless otherwise clearly defined and limited, terms such as "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] It should be noted that the methods used in the present invention are all conventional methods unless otherwise specified; the raw materials and devices used are all conventional commercially available products unless otherwise specified.

[0056] The present invention provides a kind of as Figure 1, Figure 2 and Figure 3 the stress state monitoring device for the observation window of a manned submersible shown in the figure, which mainly includes a sealed container, a pressure-resistant viewing glass 4, and a monitoring camera 6.

[0057] Among them, the sealed container is the main structure, which undertakes the main protection work for the monitoring camera 6. Therefore, it is required to have sealing performance, compressive resistance, and light transmittance on at least one side; at the same time, it has detachable performance because the monitoring camera needs to be installed in it and has certain post-maintenance performance. Therefore, the sealed container in this embodiment is selected as a segmented structure, which includes a front end cover 3, a cylinder body 2, and a rear end cover 1.

[0058] Furthermore, the cylinder body 2 is made of metal, and threaded blind holes are processed on the end faces at both ends, and counterbores are processed on the corresponding end covers on both sides, so as to fixedly connect the end covers and the cylinder body 2 through bolts. As Figure 3 and Figure 4 shown in the figure, the internal monitoring camera 6 is protected by the end covers at both ends and the cylinder body 2.

[0059] Specifically, as shown in Figures 4 - 8 the figure, the monitoring camera 6 in this embodiment is fixed inside the sealed container through a camera bracket 7. Preferably, the camera bracket 7 in this embodiment includes an expansion ring 701, a connecting column 702, and a fixing frame 703. Among them, the expansion ring 701 is a ring structure, and two symmetrically arranged connecting columns 702 are fixedly provided on one end face thereof, and the fixing frame 703 is hinged to the ends of the two connecting columns 702. The fixing frame 703 adopts a profiling design. Since the body of the monitoring camera 6 selected in this embodiment is a square shell structure, the fixing frame 703 is designed as a square frame, so that the fixing frame 703 and the monitoring camera 6 can be fixedly connected through fasteners. Further, in order to achieve better positioning and fixing effects, the expansion ring 701 in this embodiment is designed as an I-shaped ring structure, and the two flanges can effectively keep its axis coincident with the axis of the sealed container. Correspondingly, considering increasing the sealing performance and strength requirements of the cylinder body 2, the installation position is not processed on the cylinder body 2 in this embodiment, but the expansion ring 701 and the cylinder body 2 are fixed by an interference fit method. Furthermore, as Figure 8As shown, it can be seen from the schematic cross-sectional structure that the expansion ring 701 of this embodiment adopts a split design, which includes a front ring body 7011 and a rear ring body 7012. Two connecting columns 702 are provided on the front ring body 7011 and are connected to the monitoring camera 6 through a fixing frame 703; while the rear ring body 7012 is connected to the front ring body 7011 through a plurality of screws. Specifically, the lower end surface of the front ring body 7011 is a slope surface, with the inclined direction towards the axis side, and correspondingly, the upper end surface of the rear ring body 7012 is also a slope surface, but the inclined direction is away from the axis side, so as to realize the combined splicing of the two slope surfaces. Such a design is for the convenience of camera installation and centering. When installing the monitoring camera 6, first assemble the front ring body 7011 and the fixing frame 703, and then install the camera. Since the outer diameter of the front ring body 7011 is equivalent to the inner diameter of the cylinder body 2 at normal temperature and pressure (interference fit or clearance fit), the camera bracket 7 without the rear ring body 7012 is first placed into the cylinder body 2, and the rear ring body 7012, through a cold assembly process, first reduces the radial dimension by cooling and then is placed into the cylinder body 2 and is connected to the front ring body 7011 through screws. After that, when the temperature recovers, the outer diameter of the ring body 7012 increases, thus forming an interference fit with the cylinder body 2, and by increasing the screw installation torque, the radial dimension of the front ring body 701 is enlarged under the action of the slope surface. This not only avoids irreversible effects on the camera during cold assembly but also can form an interference fit connection with the cylinder body 2 from the directions of the two flanges, so it has good connection performance and centering ability. When the submersible is diving, although the water temperature will decrease with the depth, resulting in the reduction of the size of the expansion ring 701, the high pressure will also cause the cylinder body 2 to deform inward, thus still maintaining a good fixed state and providing internal support for the cylinder body 2.

[0060] A pressure-resistant sight glass 4 is installed in the front end cover 3, and the male end of a waterproof plug 5 is installed on the rear end cover 1, and the internal monitoring camera 6 is connected through a camera cable 8; while the female end of the waterproof plug 5 is connected to the lower computer inside the submersible through a cable, so as to transmit the camera data to the lower computer in real time.

[0061] As Figure 9 and Figure 10 As shown, a plug installation hole 102 is machined in the middle of the rear end cover body 101 of the rear end cover 1 specifically designed in this embodiment for installing the waterproof plug 5. A side-opening U-shaped counterbore 103 is provided on the circumferential side of the rear end cover body 101 and is connected to the cylinder body 2 through bolts. Further, a reduced-diameter front boss 104 is provided on the front side of the rear end cover body 101 and is inserted into the cylinder body 2, and an annular groove is machined on the contact surface for installing an O-ring. Such a design can improve the sealing performance between the rear end cover 1 and the cylinder body 2.

[0062] As Figure 11 and Figure 12As shown, the front end cover 3 is a hollow cylindrical structure, and the pressure-resistant sight glass 4 is installed inside. Furthermore, a plurality of mounting countersunk holes 302 are arranged on the peripheral side of the front end cover body 301, and the front end cover 3 is connected to the cylinder 2 by bolts. A reduced-diameter rear flange 303 is arranged on the rear side of the front end cover body 301, and an inner shoulder is arranged on the inner side of the rear flange 303 to receive the pressure-resistant sight glass 4, and a first inner ring groove 306 is processed on the inner shoulder to install a sealing ring to increase the sealing performance; further, an O-ring 8 is also arranged between the inner shoulder and the pressure-resistant sight glass 4, and the material of the O-ring 8 is copper, so that the possibility of the edge of the pressure-resistant sight glass 4 breaking after pressure is applied can be reduced by the deformation ability of the copper material. The rear flange 303 is also inserted into the cylinder 2, and an outer ring groove 307 is processed on the outer side of the rear flange 303. Similarly, a sealing ring is installed to increase the sealing performance between the front end cover 3 and the cylinder 2. A second inner ring groove 305 is also provided on the inner side surface of the front end cover 3 and a sealing ring is installed thereon. An annular groove 304 is processed at the front side port of the front end cover 3 and a clamping ring is installed thereon for fixing the pressure-resistant sight glass 4.

[0063] There are multiple choices for the material of the pressure-resistant mirror 4, and sapphire is selected in this embodiment.

[0064] Preferably, the monitoring device of this embodiment has a variety of installation methods and approaches. It can be placed in the sampling basket of the submersible according to the actual situation of the submersible, or detachably connected to the mechanical arm of the submersible, or detachably connected to the external bracket of the submersible, so that it has a wider adaptability.

[0065] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A stress state monitoring device for a manned submersible observation window, characterized in that: Including sealed containers, pressure-resistant sight glasses, and monitoring cameras; The front end of the sealed container is provided with the pressure-resistant sight glass, and the monitoring camera is detachably installed inside the container; The rear end of the sealed container is provided with a waterproof plug and is connected to the monitoring camera via a cable; The monitoring camera is connected to the sealed container via a camera bracket; The camera bracket is provided with an expansion ring, the expansion ring contacts the inner wall of the sealed container, and at least a part of the structure of the expansion ring is interference fit with the sealed container; The camera bracket includes an expansion ring, a connecting column and a fixing frame; At least one of the connecting columns is fixedly disposed on one end surface of the expansion ring; The connecting column is connected to the fixing frame; The fixing frame is connected to the body of the monitoring camera; The expansion ring is a split structure, and in the spliced ​​state it is an I-shaped ring structure; The expansion ring comprises a front ring body and a rear ring body; The front ring body is connected to the monitoring camera via an adapter, the rear ring body is connected to the front ring body via screws, and the joint surface between the front ring body and the rear ring body is a slope structure; The rear ring body is interference-fitted with the sealed container through a cold assembly process.

2. The stress state monitoring device for observation window of manned submersible according to claim 1, characterized in that: The sealed container is a segmented structure, comprising a front end cover, a cylinder and a rear end cover; The pressure-resistant sight glass is installed in the front end cover; The male end of the waterproof plug is installed in the rear end cover, and the female end of the waterproof plug is connected to the lower computer inside the submersible through a cable.

3. The stress state monitoring device for observation window of manned submersible according to claim 2, characterized in that: The front end cover is a hollow columnar structure, connected to the cylinder by bolts; The front end cover is provided with a rear flange with a reduced diameter, the rear flange is inserted into the interior of the cylinder, and the pressure-resistant sight glass is clamped on the rear flange.

4. The stress state monitoring device for observation window of manned submersible according to claim 3, characterized in that: The contact surface between the rear flange and the cylinder is also provided with an annular groove and a sealing ring; The contact surface between the rear flange and the pressure-resistant sight glass is also provided with an annular groove and a sealing ring is installed; An O-ring is also provided between the rear flange and the pressure-resistant sight glass, and the material of the O-ring is copper.

5. The stress state monitoring device for observation window of manned submersible according to claim 3, characterized in that: The inner side surface of the front end cover is provided with an annular groove and is equipped with a sealing ring.

6. The stress state monitoring device for observation window of manned submersible according to claim 3, characterized in that: The inner side surface of the front end cover is provided with an annular groove and is provided with a clamping ring for fixing the pressure-resistant sight glass.

7. The stress state monitoring device for observation window of manned submersible according to claim 2, characterized in that: The rear end cover is provided with a front boss with a reduced diameter, the front boss is inserted into the interior of the cylinder, and the contact surface between the front boss and the cylinder is also provided with an annular groove and a sealing ring is installed; The rear end cover is provided with a side-opening U-shaped countersunk hole and is connected to the cylinder body by bolts.

8. The stress state monitoring device for observation window of manned submersible according to claim 1, characterized in that: The monitoring device is placed in a sampling basket of the submersible, or is detachably connected to a mechanical arm of the submersible, or is detachably connected to an external bracket of the submersible.

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