Manned submersible observation window stress state monitoring device

Abstract

The invention relates to a manned submersible observation window stress state monitoring device, which belongs to the technical field of underwater equipment and mainly comprises a sealed container, a pressure-resistant sight glass and a monitoring camera. Wherein a pressure-resistant sight glass is arranged at the front end of the sealed container, a monitoring camera is arranged in the container, and a waterproof plug is arranged at the rear end of the container. The monitoring camera is connected with 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 underwater monitoring device is simple in structure and low in cost, underwater real-time monitoring is achieved through the combination of the sealed container, the pressure-resistant sight glass and the monitoring camera, and precise equipment is correspondingly protected; by combining the design of the expansion ring, the monitoring camera can be quickly fixed, the structure of the device is simplified, the corresponding mounting position design is reduced, the overall sealing performance and strength of the device are improved, the device is suitable for working in the deep sea environment, and the expansion ring can provide an additional supporting position for the sealed container, so that the overall pressure resistance is improved.

Description

Technical Field

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

[0002] During underwater operations of manned submersibles at great depths, common manned submersibles are designed with observation windows, the main purpose of which is to provide the crew with a more intuitive channel to observe the deep-sea environment, and to help alleviate the negative psychological effects of confined and narrow spaces on operators.

[0003] In reality, due to the size and material of the observation window, it can easily become a weak link in the overall strength of the submersible. Therefore, from a safety perspective, there is a need for continuous inspection of the observation window on the submersible in order to improve the safety of diving. Among them, high-precision in-situ inspection of the internal stress of the observation window is particularly needed. The purpose is to deeply understand the internal stress stratification distribution, elastic-plastic transition and stress accumulation release of the submersible observation window under the conditions of temperature, load time, loading rate and stress level, and accurately express the physical and mechanical response of the submersible observation window during the entire process of service, so as to avoid the occurrence of dangerous conditions as early as possible.

[0004] Therefore, the above detection can be completed through the RGB instantaneous photoelastic measurement technology based on the color polarization camera to complete the online monitoring of the stress state of the observation window. This detection method has the characteristics of lightweight, follow-up and high stability. It can be carried 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 of miniaturization, low power consumption, high anti-interference and adaptability to small spaces of deep-sea measuring instruments carried by submersibles.

[0005] However, since the observation window surface that the above equipment needs to measure is located on the high-pressure side (outside the submersible), the camera needs to be installed in the external space of the submersible. Therefore, based on the installation environment problem, two design schemes have emerged. One is to increase the external structure of the submersible and install a camera in it so that it can directly monitor the observation window. Although this design idea is easy to understand and improve the design, this scheme will significantly increase the overall design and production cost of the submersible, and the corresponding monitoring device is not universal and cannot be adapted to the already formed submersible; the other is to provide pressure-resistant and waterproof protection for the camera used in the scheme. If the existing camera is to be improved, it must be redesigned, which will not only significantly increase the cost of use, but also due to the complex deep-sea environment, there are other physical damages if the camera body is directly placed externally.

[0006] In summary, it is also necessary to design a stress state monitoring device for the observation window of a manned submersible that can be used in a deep-sea environment. Based on the above-mentioned detection technology, it can monitor the observation window in real time under low-cost conditions and have certain 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 an observation window of a manned submersible, which solves the above problems by optimizing the overall structural design.

[0008] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A stress state monitoring device for an observation window of a manned submersible, which mainly comprises a sealed container, a pressure-resistant sight glass, and a monitoring camera; 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 is in contact with 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.

[0009] Further, 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.

[0010] Furthermore, 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.

[0011] Furthermore, the sealed container is a segmented structure, including 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.

[0012] Furthermore, 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.

[0013] Furthermore, the contact surface between the rear flange and the cylinder is also provided with an annular groove and a sealing ring is installed; 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.

[0014] Furthermore, an annular groove is provided on the inner side surface of the front end cover and a sealing ring is installed.

[0015] Furthermore, an annular groove is provided on the inner side surface of the front end cover, and a clamping ring is installed thereon for fixing the pressure-resistant sight glass.

[0016] Furthermore, 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.

[0017] Furthermore, 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.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 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 expansion ring design, the monitoring camera can be quickly fixed, and the structure of the device is simplified, reducing the corresponding installation position design, so as to improve its overall sealing and strength, making it suitable for working in deep-sea environments. The expansion ring can also provide additional support positions for its sealed container, thereby increasing the overall pressure resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1It is a front perspective view of a specific embodiment of the present invention; Figure 2 It is a rear perspective view of a specific embodiment of the present invention; Figure 3 It is a longitudinal cross-sectional schematic diagram of a specific embodiment of the present invention; Figure 4 It is a schematic diagram of the internal structure of the device in a specific embodiment of the present invention; Figure 5 It is a schematic diagram of the installation position of the monitoring camera and the pressure-resistant mirror in a specific embodiment of the present invention; Figure 6 It is a stereoscopic diagram of the combination of a monitoring camera and a camera bracket in a specific embodiment of the present invention; Figure 7 A three-dimensional diagram of a camera bracket in a specific embodiment of the present invention; Figure 8 It is a cross-sectional view of an expansion ring in a specific embodiment of the present invention; Fig. 9 It is a three-dimensional diagram of the rear end cover in a specific embodiment of the present invention; Fig.10 It is a cross-sectional view of the rear end cover in a specific embodiment of the present invention; Fig.11 A three-dimensional diagram of a front end cover in a specific embodiment of the present invention; Fig.12 It is a cross-sectional view of the front end cover in a specific embodiment of the present invention.

[0021] In the figure: 1, rear end cover, 2, cylinder, 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 countersunk hole, 104, front boss, 301, front end cover body, 302, mounting countersunk hole, 303, rear flange, 304, annular groove, 305, second inner ring groove, 306, first inner ring groove, 307, outer ring groove, 701, expansion ring, 702, connecting column, 703, fixing frame, 7011, front ring body, 7012, rear ring body. DETAILED DESCRIPTION

[0022] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present invention, it is necessary to understand that the relative relationships indicated by the terms "front" and "rear" are based on the relationship of the device to the observation window when it is in the installed position in actual application. They are for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position. Therefore, they cannot be understood as limitations on the present invention.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] 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.

[0027] The present invention provides a Figure 1 , Figure 2 and Figure 3 The device for monitoring the stress state of the observation window of a manned submersible shown mainly comprises a sealed container, a pressure-resistant sight glass 4 , and a monitoring camera 6 .

[0028] The sealed container is the main structure, which is responsible for protecting the monitoring camera 6. Therefore, it needs to be airtight, pressure-resistant and light-transmissive on at least one side; it also needs to be detachable because the monitoring camera needs to be installed in it and has a certain degree of post-maintenance. Therefore, the sealed container of this embodiment is a segmented structure, which includes a front cover 3, a cylinder 2 and a rear cover 1.

[0029] Furthermore, the cylinder 2 is made of metal, and the end faces at both ends are processed with threaded blind holes, and countersunk holes are processed on the corresponding end covers on both sides so that the end covers can be fixedly connected to the cylinder 2 by bolts. Figure 3 and Figure 4 As shown, the internal monitoring camera 6 is protected by the end covers and the cylinder 2 at both ends.

[0030] Specifically, combined Figure 4-Figure 8As shown, the monitoring camera 6 of this embodiment is fixed inside the sealed container by a camera bracket 7. Preferably, the camera bracket 7 of this embodiment includes an expansion ring 701, a connecting column 702 and a fixed frame 703. Among them, the expansion ring 701 is an annular structure, and two symmetrically arranged connecting columns 702 are fixedly provided on one end face thereof, and the ends of the two connecting columns 702 are hinged to the fixed frame 703. The fixed frame 703 adopts a contoured design. Since the body of the monitoring camera 6 selected in this embodiment example is a square shell structure, the fixed frame 703 is designed to be a square frame, so that the fixed frame 703 can be fixedly connected to the monitoring camera 6 by fasteners. Further, in order to achieve better positioning and fixing effects, the expansion ring 701 of this embodiment is designed to be an I-ring structure, and the two flanges can effectively keep its axis coincident with the axis of the sealed container. Correspondingly, considering the increase in the sealing and strength requirements of the cylinder 2, the present embodiment does not process the mounting position on the cylinder 2, but instead fixes the expansion ring 701 and the cylinder 2 by interference fit. Furthermore, as Figure 8 As shown, it can be seen from the schematic diagram of the 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 set on the front ring body 7011, and it is connected to the monitoring camera 6 through a fixed frame 703; and the rear ring body 7012 is connected to the front ring body 7011 through a plurality of screws. Specifically, the lower end face of the front ring body 7011 is a slope, and the inclination direction is toward one side of the axis, and the upper end face of the rear ring body 7012 is also a slope, but the inclination direction is away from the axis, so as to realize the combination and splicing of the two slopes. The reason for this design is to facilitate the installation and centering of the camera. When the monitoring camera 6 needs to be installed, the front ring body 7011 and the fixing frame 703 are assembled first, and then the camera is installed. Since the outer diameter of the front ring body 7011 is equivalent to the inner diameter of the barrel 2 at normal temperature and pressure (interference fit or clearance fit), the camera bracket 7 without the rear ring body 7012 is first placed in the barrel 2, and the rear ring body 7012 is first cooled and reduced in radial size through a cold assembly process, and then placed in the barrel 2 and connected to the front ring body 7011 through screws. Afterwards, when the temperature is restored, the outer diameter of the ring body 7012 increases, thereby forming an interference fit with the barrel 2, and by increasing the screw installation torque, the radial size of the front ring body 701 is expanded under the action of the slope, which not only avoids irreversible effects on the camera during cold assembly, but also can be connected to the barrel 2 through interference fit from the direction of the two flanges, thereby having better connection performance and centering ability. When the submersible is diving, although the water temperature will decrease with depth, causing the expansion ring 701 to shrink in size, the high pressure will also cause the cylinder 2 to deform inward, thereby still maintaining a relatively good fixed state and providing internal support for the cylinder 2.

[0031] A pressure-resistant sight glass 4 is installed in the front cover 3, and the male end of the waterproof plug 5 is installed on the rear cover 1, which is connected to the internal monitoring camera 6 through the camera cable 8; and 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.

[0032] like Fig. 9 and Fig.10 As shown, the plug installation hole 102 is processed in the middle of the rear end cover body 101 of the rear end cover 1 specifically designed in this embodiment, which is used to install the waterproof plug 5. A side-opening U-shaped countersunk hole 103 is set on the peripheral side of the rear end cover body 101, and is connected to the cylinder 2 by bolts. Furthermore, a front boss 104 with a reduced diameter is set on the front side of the rear end cover body 101, and it is inserted into the cylinder 2, and an annular groove is also processed on the contact surface to install the O-ring. This design can improve the sealing between the rear end cover 1 and the cylinder 2.

[0033] like Fig.11 and Fig.12 As 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.

[0034] There are multiple choices for the material of the pressure-resistant mirror 4, and sapphire is selected in this embodiment.

[0035] 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.

[0036] 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 is in contact with 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.

2. The stress state monitoring device for observation window of manned submersible according to claim 1, characterized in that: 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.

3. The stress state monitoring device for observation window of manned submersible according to claim 1 or 2, characterized in that: 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.

4. 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.

5. The stress state monitoring device for observation window of manned submersible according to claim 4, 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.

6. The stress state monitoring device for observation window of manned submersible according to claim 5, 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.

7. The stress state monitoring device for observation window of manned submersible according to claim 5, 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.

8. The stress state monitoring device for observation window of manned submersible according to claim 5, 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.

9. The stress state monitoring device for observation window of manned submersible according to claim 4, 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.

10. 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.

Images